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 | { | |
4db1a1dc | 2689 | char *data; |
36586728 TT |
2690 | struct cleanup *cleanup; |
2691 | const char *filename; | |
2692 | struct dwz_file *result; | |
acd13123 | 2693 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2694 | size_t buildid_len; |
2695 | bfd_byte *buildid; | |
36586728 TT |
2696 | |
2697 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2698 | return dwarf2_per_objfile->dwz_file; | |
2699 | ||
4db1a1dc TT |
2700 | bfd_set_error (bfd_error_no_error); |
2701 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
acd13123 | 2702 | &buildid_len_arg, &buildid); |
4db1a1dc TT |
2703 | if (data == NULL) |
2704 | { | |
2705 | if (bfd_get_error () == bfd_error_no_error) | |
2706 | return NULL; | |
2707 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2708 | bfd_errmsg (bfd_get_error ())); | |
2709 | } | |
36586728 | 2710 | cleanup = make_cleanup (xfree, data); |
dc294be5 | 2711 | make_cleanup (xfree, buildid); |
36586728 | 2712 | |
acd13123 TT |
2713 | buildid_len = (size_t) buildid_len_arg; |
2714 | ||
f9d83a0b | 2715 | filename = (const char *) data; |
d721ba37 PA |
2716 | |
2717 | std::string abs_storage; | |
36586728 TT |
2718 | if (!IS_ABSOLUTE_PATH (filename)) |
2719 | { | |
14278e1f TT |
2720 | gdb::unique_xmalloc_ptr<char> abs |
2721 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2722 | |
14278e1f | 2723 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2724 | filename = abs_storage.c_str (); |
36586728 TT |
2725 | } |
2726 | ||
dc294be5 TT |
2727 | /* First try the file name given in the section. If that doesn't |
2728 | work, try to use the build-id instead. */ | |
192b62ce | 2729 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2730 | if (dwz_bfd != NULL) |
36586728 | 2731 | { |
192b62ce TT |
2732 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
2733 | dwz_bfd.release (); | |
36586728 TT |
2734 | } |
2735 | ||
dc294be5 TT |
2736 | if (dwz_bfd == NULL) |
2737 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2738 | ||
2739 | if (dwz_bfd == NULL) | |
2740 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2741 | objfile_name (dwarf2_per_objfile->objfile)); | |
2742 | ||
36586728 TT |
2743 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, |
2744 | struct dwz_file); | |
192b62ce | 2745 | result->dwz_bfd = dwz_bfd.release (); |
36586728 | 2746 | |
192b62ce | 2747 | bfd_map_over_sections (result->dwz_bfd, locate_dwz_sections, result); |
36586728 TT |
2748 | |
2749 | do_cleanups (cleanup); | |
2750 | ||
192b62ce | 2751 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, result->dwz_bfd); |
8d2cc612 | 2752 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2753 | return result; |
2754 | } | |
9291a0cd | 2755 | \f |
7b9f3c50 DE |
2756 | /* DWARF quick_symbols_functions support. */ |
2757 | ||
2758 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2759 | unique line tables, so we maintain a separate table of all .debug_line | |
2760 | derived entries to support the sharing. | |
2761 | All the quick functions need is the list of file names. We discard the | |
2762 | line_header when we're done and don't need to record it here. */ | |
2763 | struct quick_file_names | |
2764 | { | |
094b34ac DE |
2765 | /* The data used to construct the hash key. */ |
2766 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2767 | |
2768 | /* The number of entries in file_names, real_names. */ | |
2769 | unsigned int num_file_names; | |
2770 | ||
2771 | /* The file names from the line table, after being run through | |
2772 | file_full_name. */ | |
2773 | const char **file_names; | |
2774 | ||
2775 | /* The file names from the line table after being run through | |
2776 | gdb_realpath. These are computed lazily. */ | |
2777 | const char **real_names; | |
2778 | }; | |
2779 | ||
2780 | /* When using the index (and thus not using psymtabs), each CU has an | |
2781 | object of this type. This is used to hold information needed by | |
2782 | the various "quick" methods. */ | |
2783 | struct dwarf2_per_cu_quick_data | |
2784 | { | |
2785 | /* The file table. This can be NULL if there was no file table | |
2786 | or it's currently not read in. | |
2787 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2788 | struct quick_file_names *file_names; | |
2789 | ||
2790 | /* The corresponding symbol table. This is NULL if symbols for this | |
2791 | CU have not yet been read. */ | |
43f3e411 | 2792 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2793 | |
2794 | /* A temporary mark bit used when iterating over all CUs in | |
2795 | expand_symtabs_matching. */ | |
2796 | unsigned int mark : 1; | |
2797 | ||
2798 | /* True if we've tried to read the file table and found there isn't one. | |
2799 | There will be no point in trying to read it again next time. */ | |
2800 | unsigned int no_file_data : 1; | |
2801 | }; | |
2802 | ||
094b34ac DE |
2803 | /* Utility hash function for a stmt_list_hash. */ |
2804 | ||
2805 | static hashval_t | |
2806 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2807 | { | |
2808 | hashval_t v = 0; | |
2809 | ||
2810 | if (stmt_list_hash->dwo_unit != NULL) | |
2811 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2812 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2813 | return v; |
2814 | } | |
2815 | ||
2816 | /* Utility equality function for a stmt_list_hash. */ | |
2817 | ||
2818 | static int | |
2819 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2820 | const struct stmt_list_hash *rhs) | |
2821 | { | |
2822 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2823 | return 0; | |
2824 | if (lhs->dwo_unit != NULL | |
2825 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2826 | return 0; | |
2827 | ||
9c541725 | 2828 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2829 | } |
2830 | ||
7b9f3c50 DE |
2831 | /* Hash function for a quick_file_names. */ |
2832 | ||
2833 | static hashval_t | |
2834 | hash_file_name_entry (const void *e) | |
2835 | { | |
9a3c8263 SM |
2836 | const struct quick_file_names *file_data |
2837 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2838 | |
094b34ac | 2839 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2840 | } |
2841 | ||
2842 | /* Equality function for a quick_file_names. */ | |
2843 | ||
2844 | static int | |
2845 | eq_file_name_entry (const void *a, const void *b) | |
2846 | { | |
9a3c8263 SM |
2847 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2848 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2849 | |
094b34ac | 2850 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2851 | } |
2852 | ||
2853 | /* Delete function for a quick_file_names. */ | |
2854 | ||
2855 | static void | |
2856 | delete_file_name_entry (void *e) | |
2857 | { | |
9a3c8263 | 2858 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2859 | int i; |
2860 | ||
2861 | for (i = 0; i < file_data->num_file_names; ++i) | |
2862 | { | |
2863 | xfree ((void*) file_data->file_names[i]); | |
2864 | if (file_data->real_names) | |
2865 | xfree ((void*) file_data->real_names[i]); | |
2866 | } | |
2867 | ||
2868 | /* The space for the struct itself lives on objfile_obstack, | |
2869 | so we don't free it here. */ | |
2870 | } | |
2871 | ||
2872 | /* Create a quick_file_names hash table. */ | |
2873 | ||
2874 | static htab_t | |
2875 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2876 | { | |
2877 | return htab_create_alloc (nr_initial_entries, | |
2878 | hash_file_name_entry, eq_file_name_entry, | |
2879 | delete_file_name_entry, xcalloc, xfree); | |
2880 | } | |
9291a0cd | 2881 | |
918dd910 JK |
2882 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2883 | have to be created afterwards. You should call age_cached_comp_units after | |
2884 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2885 | ||
2886 | static void | |
2887 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2888 | { | |
3019eac3 | 2889 | if (per_cu->is_debug_types) |
e5fe5e75 | 2890 | load_full_type_unit (per_cu); |
918dd910 | 2891 | else |
95554aad | 2892 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2893 | |
cc12ce38 DE |
2894 | if (per_cu->cu == NULL) |
2895 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2896 | |
2897 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2898 | } |
2899 | ||
a0f42c21 | 2900 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2901 | |
9291a0cd | 2902 | static void |
a0f42c21 | 2903 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2904 | { |
2905 | struct cleanup *back_to; | |
2906 | ||
f4dc4d17 DE |
2907 | /* Skip type_unit_groups, reading the type units they contain |
2908 | is handled elsewhere. */ | |
2909 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2910 | return; | |
2911 | ||
9291a0cd TT |
2912 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2913 | ||
95554aad | 2914 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2915 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2916 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2917 | { | |
2918 | queue_comp_unit (per_cu, language_minimal); | |
2919 | load_cu (per_cu); | |
89e63ee4 DE |
2920 | |
2921 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2922 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2923 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2924 | if (!per_cu->is_debug_types | |
cc12ce38 | 2925 | && per_cu->cu != NULL |
89e63ee4 DE |
2926 | && per_cu->cu->dwo_unit != NULL |
2927 | && dwarf2_per_objfile->index_table != NULL | |
2928 | && dwarf2_per_objfile->index_table->version <= 7 | |
2929 | /* DWP files aren't supported yet. */ | |
2930 | && get_dwp_file () == NULL) | |
2931 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2932 | } |
9291a0cd | 2933 | |
a0f42c21 | 2934 | process_queue (); |
9291a0cd TT |
2935 | |
2936 | /* Age the cache, releasing compilation units that have not | |
2937 | been used recently. */ | |
2938 | age_cached_comp_units (); | |
2939 | ||
2940 | do_cleanups (back_to); | |
2941 | } | |
2942 | ||
2943 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2944 | the objfile from which this CU came. Returns the resulting symbol | |
2945 | table. */ | |
2fdf6df6 | 2946 | |
43f3e411 | 2947 | static struct compunit_symtab * |
a0f42c21 | 2948 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2949 | { |
95554aad | 2950 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2951 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
2952 | { |
2953 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
c83dd867 | 2954 | scoped_restore decrementer = increment_reading_symtab (); |
a0f42c21 | 2955 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2956 | process_cu_includes (); |
9291a0cd TT |
2957 | do_cleanups (back_to); |
2958 | } | |
f194fefb | 2959 | |
43f3e411 | 2960 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2961 | } |
2962 | ||
8832e7e3 | 2963 | /* Return the CU/TU given its index. |
f4dc4d17 DE |
2964 | |
2965 | This is intended for loops like: | |
2966 | ||
2967 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2968 | + dwarf2_per_objfile->n_type_units); ++i) | |
2969 | { | |
8832e7e3 | 2970 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
f4dc4d17 DE |
2971 | |
2972 | ...; | |
2973 | } | |
2974 | */ | |
2fdf6df6 | 2975 | |
1fd400ff | 2976 | static struct dwarf2_per_cu_data * |
8832e7e3 | 2977 | dw2_get_cutu (int index) |
1fd400ff TT |
2978 | { |
2979 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2980 | { | |
f4dc4d17 | 2981 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2982 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2983 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2984 | } |
2985 | ||
2986 | return dwarf2_per_objfile->all_comp_units[index]; | |
2987 | } | |
2988 | ||
8832e7e3 DE |
2989 | /* Return the CU given its index. |
2990 | This differs from dw2_get_cutu in that it's for when you know INDEX | |
2991 | refers to a CU. */ | |
f4dc4d17 DE |
2992 | |
2993 | static struct dwarf2_per_cu_data * | |
8832e7e3 | 2994 | dw2_get_cu (int index) |
f4dc4d17 | 2995 | { |
8832e7e3 | 2996 | gdb_assert (index >= 0 && index < dwarf2_per_objfile->n_comp_units); |
f4dc4d17 | 2997 | |
1fd400ff TT |
2998 | return dwarf2_per_objfile->all_comp_units[index]; |
2999 | } | |
3000 | ||
2ec9a5e0 TT |
3001 | /* A helper for create_cus_from_index that handles a given list of |
3002 | CUs. */ | |
2fdf6df6 | 3003 | |
74a0d9f6 | 3004 | static void |
2ec9a5e0 TT |
3005 | create_cus_from_index_list (struct objfile *objfile, |
3006 | const gdb_byte *cu_list, offset_type n_elements, | |
3007 | struct dwarf2_section_info *section, | |
3008 | int is_dwz, | |
3009 | int base_offset) | |
9291a0cd TT |
3010 | { |
3011 | offset_type i; | |
9291a0cd | 3012 | |
2ec9a5e0 | 3013 | for (i = 0; i < n_elements; i += 2) |
9291a0cd | 3014 | { |
74a0d9f6 | 3015 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3016 | |
3017 | sect_offset sect_off | |
3018 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3019 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3020 | cu_list += 2 * 8; |
3021 | ||
9c541725 PA |
3022 | dwarf2_per_cu_data *the_cu |
3023 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3024 | struct dwarf2_per_cu_data); | |
3025 | the_cu->sect_off = sect_off; | |
9291a0cd TT |
3026 | the_cu->length = length; |
3027 | the_cu->objfile = objfile; | |
8a0459fd | 3028 | the_cu->section = section; |
9291a0cd TT |
3029 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3030 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
3031 | the_cu->is_dwz = is_dwz; |
3032 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 3033 | } |
9291a0cd TT |
3034 | } |
3035 | ||
2ec9a5e0 | 3036 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3037 | the CU objects for this objfile. */ |
2ec9a5e0 | 3038 | |
74a0d9f6 | 3039 | static void |
2ec9a5e0 TT |
3040 | create_cus_from_index (struct objfile *objfile, |
3041 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
3042 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3043 | { | |
3044 | struct dwz_file *dwz; | |
3045 | ||
3046 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
8d749320 SM |
3047 | dwarf2_per_objfile->all_comp_units = |
3048 | XOBNEWVEC (&objfile->objfile_obstack, struct dwarf2_per_cu_data *, | |
3049 | dwarf2_per_objfile->n_comp_units); | |
2ec9a5e0 | 3050 | |
74a0d9f6 JK |
3051 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
3052 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
3053 | |
3054 | if (dwz_elements == 0) | |
74a0d9f6 | 3055 | return; |
2ec9a5e0 TT |
3056 | |
3057 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
3058 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
3059 | cu_list_elements / 2); | |
2ec9a5e0 TT |
3060 | } |
3061 | ||
1fd400ff | 3062 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3063 | |
74a0d9f6 | 3064 | static void |
673bfd45 | 3065 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 3066 | struct dwarf2_section_info *section, |
673bfd45 DE |
3067 | const gdb_byte *bytes, |
3068 | offset_type elements) | |
1fd400ff TT |
3069 | { |
3070 | offset_type i; | |
673bfd45 | 3071 | htab_t sig_types_hash; |
1fd400ff | 3072 | |
6aa5f3a6 DE |
3073 | dwarf2_per_objfile->n_type_units |
3074 | = dwarf2_per_objfile->n_allocated_type_units | |
3075 | = elements / 3; | |
8d749320 SM |
3076 | dwarf2_per_objfile->all_type_units = |
3077 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
1fd400ff | 3078 | |
673bfd45 | 3079 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
3080 | |
3081 | for (i = 0; i < elements; i += 3) | |
3082 | { | |
52dc124a | 3083 | struct signatured_type *sig_type; |
9c541725 | 3084 | ULONGEST signature; |
1fd400ff | 3085 | void **slot; |
9c541725 | 3086 | cu_offset type_offset_in_tu; |
1fd400ff | 3087 | |
74a0d9f6 | 3088 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3089 | sect_offset sect_off |
3090 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3091 | type_offset_in_tu | |
3092 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3093 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3094 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3095 | bytes += 3 * 8; | |
3096 | ||
52dc124a | 3097 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3098 | struct signatured_type); |
52dc124a | 3099 | sig_type->signature = signature; |
9c541725 | 3100 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3101 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3102 | sig_type->per_cu.section = section; |
9c541725 | 3103 | sig_type->per_cu.sect_off = sect_off; |
52dc124a DE |
3104 | sig_type->per_cu.objfile = objfile; |
3105 | sig_type->per_cu.v.quick | |
1fd400ff TT |
3106 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3107 | struct dwarf2_per_cu_quick_data); | |
3108 | ||
52dc124a DE |
3109 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3110 | *slot = sig_type; | |
1fd400ff | 3111 | |
b4dd5633 | 3112 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
3113 | } |
3114 | ||
673bfd45 | 3115 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3116 | } |
3117 | ||
9291a0cd TT |
3118 | /* Read the address map data from the mapped index, and use it to |
3119 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3120 | |
9291a0cd TT |
3121 | static void |
3122 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
3123 | { | |
3e29f34a | 3124 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3125 | const gdb_byte *iter, *end; |
9291a0cd | 3126 | struct addrmap *mutable_map; |
9291a0cd TT |
3127 | CORE_ADDR baseaddr; |
3128 | ||
8268c778 PA |
3129 | auto_obstack temp_obstack; |
3130 | ||
9291a0cd TT |
3131 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3132 | ||
3133 | iter = index->address_table; | |
3134 | end = iter + index->address_table_size; | |
3135 | ||
3136 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
3137 | ||
3138 | while (iter < end) | |
3139 | { | |
3140 | ULONGEST hi, lo, cu_index; | |
3141 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3142 | iter += 8; | |
3143 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3144 | iter += 8; | |
3145 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3146 | iter += 4; | |
f652bce2 | 3147 | |
24a55014 | 3148 | if (lo > hi) |
f652bce2 | 3149 | { |
24a55014 DE |
3150 | complaint (&symfile_complaints, |
3151 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 3152 | hex_string (lo), hex_string (hi)); |
24a55014 | 3153 | continue; |
f652bce2 | 3154 | } |
24a55014 DE |
3155 | |
3156 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
3157 | { |
3158 | complaint (&symfile_complaints, | |
3159 | _(".gdb_index address table has invalid CU number %u"), | |
3160 | (unsigned) cu_index); | |
24a55014 | 3161 | continue; |
f652bce2 | 3162 | } |
24a55014 | 3163 | |
3e29f34a MR |
3164 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr); |
3165 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr); | |
3166 | addrmap_set_empty (mutable_map, lo, hi - 1, dw2_get_cutu (cu_index)); | |
9291a0cd TT |
3167 | } |
3168 | ||
3169 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
3170 | &objfile->objfile_obstack); | |
9291a0cd TT |
3171 | } |
3172 | ||
59d7bcaf JK |
3173 | /* The hash function for strings in the mapped index. This is the same as |
3174 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
3175 | implementation. This is necessary because the hash function is tied to the | |
3176 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
3177 | SYMBOL_HASH_NEXT. |
3178 | ||
3179 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 3180 | |
9291a0cd | 3181 | static hashval_t |
559a7a62 | 3182 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
3183 | { |
3184 | const unsigned char *str = (const unsigned char *) p; | |
3185 | hashval_t r = 0; | |
3186 | unsigned char c; | |
3187 | ||
3188 | while ((c = *str++) != 0) | |
559a7a62 JK |
3189 | { |
3190 | if (index_version >= 5) | |
3191 | c = tolower (c); | |
3192 | r = r * 67 + c - 113; | |
3193 | } | |
9291a0cd TT |
3194 | |
3195 | return r; | |
3196 | } | |
3197 | ||
3198 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
3199 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
3200 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 3201 | |
9291a0cd TT |
3202 | static int |
3203 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
3204 | offset_type **vec_out) | |
3205 | { | |
0cf03b49 JK |
3206 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
3207 | offset_type hash; | |
9291a0cd | 3208 | offset_type slot, step; |
559a7a62 | 3209 | int (*cmp) (const char *, const char *); |
9291a0cd | 3210 | |
0cf03b49 | 3211 | if (current_language->la_language == language_cplus |
45280282 IB |
3212 | || current_language->la_language == language_fortran |
3213 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3214 | { |
3215 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3216 | not contain any. */ | |
a8719064 | 3217 | |
72998fb3 | 3218 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3219 | { |
72998fb3 | 3220 | char *without_params = cp_remove_params (name); |
0cf03b49 | 3221 | |
72998fb3 DE |
3222 | if (without_params != NULL) |
3223 | { | |
3224 | make_cleanup (xfree, without_params); | |
3225 | name = without_params; | |
3226 | } | |
0cf03b49 JK |
3227 | } |
3228 | } | |
3229 | ||
559a7a62 | 3230 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3231 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3232 | simulate our NAME being searched is also lowercased. */ |
3233 | hash = mapped_index_string_hash ((index->version == 4 | |
3234 | && case_sensitivity == case_sensitive_off | |
3235 | ? 5 : index->version), | |
3236 | name); | |
3237 | ||
3876f04e DE |
3238 | slot = hash & (index->symbol_table_slots - 1); |
3239 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 3240 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3241 | |
3242 | for (;;) | |
3243 | { | |
3244 | /* Convert a slot number to an offset into the table. */ | |
3245 | offset_type i = 2 * slot; | |
3246 | const char *str; | |
3876f04e | 3247 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
3248 | { |
3249 | do_cleanups (back_to); | |
3250 | return 0; | |
3251 | } | |
9291a0cd | 3252 | |
3876f04e | 3253 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 3254 | if (!cmp (name, str)) |
9291a0cd TT |
3255 | { |
3256 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 3257 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 3258 | do_cleanups (back_to); |
9291a0cd TT |
3259 | return 1; |
3260 | } | |
3261 | ||
3876f04e | 3262 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
3263 | } |
3264 | } | |
3265 | ||
2ec9a5e0 TT |
3266 | /* A helper function that reads the .gdb_index from SECTION and fills |
3267 | in MAP. FILENAME is the name of the file containing the section; | |
3268 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
3269 | ok to use deprecated sections. | |
3270 | ||
3271 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3272 | out parameters that are filled in with information about the CU and | |
3273 | TU lists in the section. | |
3274 | ||
3275 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 3276 | |
9291a0cd | 3277 | static int |
2ec9a5e0 TT |
3278 | read_index_from_section (struct objfile *objfile, |
3279 | const char *filename, | |
3280 | int deprecated_ok, | |
3281 | struct dwarf2_section_info *section, | |
3282 | struct mapped_index *map, | |
3283 | const gdb_byte **cu_list, | |
3284 | offset_type *cu_list_elements, | |
3285 | const gdb_byte **types_list, | |
3286 | offset_type *types_list_elements) | |
9291a0cd | 3287 | { |
948f8e3d | 3288 | const gdb_byte *addr; |
2ec9a5e0 | 3289 | offset_type version; |
b3b272e1 | 3290 | offset_type *metadata; |
1fd400ff | 3291 | int i; |
9291a0cd | 3292 | |
2ec9a5e0 | 3293 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 3294 | return 0; |
82430852 JK |
3295 | |
3296 | /* Older elfutils strip versions could keep the section in the main | |
3297 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 3298 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
3299 | return 0; |
3300 | ||
2ec9a5e0 | 3301 | dwarf2_read_section (objfile, section); |
9291a0cd | 3302 | |
2ec9a5e0 | 3303 | addr = section->buffer; |
9291a0cd | 3304 | /* Version check. */ |
1fd400ff | 3305 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3306 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3307 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3308 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3309 | indices. */ |
831adc1f | 3310 | if (version < 4) |
481860b3 GB |
3311 | { |
3312 | static int warning_printed = 0; | |
3313 | if (!warning_printed) | |
3314 | { | |
3315 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3316 | filename); |
481860b3 GB |
3317 | warning_printed = 1; |
3318 | } | |
3319 | return 0; | |
3320 | } | |
3321 | /* Index version 4 uses a different hash function than index version | |
3322 | 5 and later. | |
3323 | ||
3324 | Versions earlier than 6 did not emit psymbols for inlined | |
3325 | functions. Using these files will cause GDB not to be able to | |
3326 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3327 | indices unless the user has done |
3328 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3329 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3330 | { |
3331 | static int warning_printed = 0; | |
3332 | if (!warning_printed) | |
3333 | { | |
e615022a DE |
3334 | warning (_("\ |
3335 | Skipping deprecated .gdb_index section in %s.\n\ | |
3336 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3337 | to use the section anyway."), | |
2ec9a5e0 | 3338 | filename); |
481860b3 GB |
3339 | warning_printed = 1; |
3340 | } | |
3341 | return 0; | |
3342 | } | |
796a7ff8 | 3343 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3344 | of the TU (for symbols coming from TUs), |
3345 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3346 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3347 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3348 | These are just performance bugs, and we can't distinguish gdb-generated | |
3349 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3350 | |
481860b3 | 3351 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3352 | longer backward compatible. */ |
796a7ff8 | 3353 | if (version > 8) |
594e8718 | 3354 | return 0; |
9291a0cd | 3355 | |
559a7a62 | 3356 | map->version = version; |
2ec9a5e0 | 3357 | map->total_size = section->size; |
9291a0cd TT |
3358 | |
3359 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
3360 | |
3361 | i = 0; | |
2ec9a5e0 TT |
3362 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3363 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3364 | / 8); | |
1fd400ff TT |
3365 | ++i; |
3366 | ||
2ec9a5e0 TT |
3367 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3368 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3369 | - MAYBE_SWAP (metadata[i])) | |
3370 | / 8); | |
987d643c | 3371 | ++i; |
1fd400ff TT |
3372 | |
3373 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
3374 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
3375 | - MAYBE_SWAP (metadata[i])); | |
3376 | ++i; | |
3377 | ||
3876f04e DE |
3378 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
3379 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
3380 | - MAYBE_SWAP (metadata[i])) | |
3381 | / (2 * sizeof (offset_type))); | |
1fd400ff | 3382 | ++i; |
9291a0cd | 3383 | |
f9d83a0b | 3384 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3385 | |
2ec9a5e0 TT |
3386 | return 1; |
3387 | } | |
3388 | ||
3389 | ||
3390 | /* Read the index file. If everything went ok, initialize the "quick" | |
3391 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
3392 | ||
3393 | static int | |
3394 | dwarf2_read_index (struct objfile *objfile) | |
3395 | { | |
3396 | struct mapped_index local_map, *map; | |
3397 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
3398 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3399 | struct dwz_file *dwz; |
2ec9a5e0 | 3400 | |
4262abfb | 3401 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
3402 | use_deprecated_index_sections, |
3403 | &dwarf2_per_objfile->gdb_index, &local_map, | |
3404 | &cu_list, &cu_list_elements, | |
3405 | &types_list, &types_list_elements)) | |
3406 | return 0; | |
3407 | ||
0fefef59 | 3408 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 3409 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
3410 | return 0; |
3411 | ||
2ec9a5e0 TT |
3412 | /* If there is a .dwz file, read it so we can get its CU list as |
3413 | well. */ | |
4db1a1dc TT |
3414 | dwz = dwarf2_get_dwz_file (); |
3415 | if (dwz != NULL) | |
2ec9a5e0 | 3416 | { |
2ec9a5e0 TT |
3417 | struct mapped_index dwz_map; |
3418 | const gdb_byte *dwz_types_ignore; | |
3419 | offset_type dwz_types_elements_ignore; | |
3420 | ||
3421 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
3422 | 1, | |
3423 | &dwz->gdb_index, &dwz_map, | |
3424 | &dwz_list, &dwz_list_elements, | |
3425 | &dwz_types_ignore, | |
3426 | &dwz_types_elements_ignore)) | |
3427 | { | |
3428 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
3429 | bfd_get_filename (dwz->dwz_bfd)); | |
3430 | return 0; | |
3431 | } | |
3432 | } | |
3433 | ||
74a0d9f6 JK |
3434 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
3435 | dwz_list_elements); | |
1fd400ff | 3436 | |
8b70b953 TT |
3437 | if (types_list_elements) |
3438 | { | |
3439 | struct dwarf2_section_info *section; | |
3440 | ||
3441 | /* We can only handle a single .debug_types when we have an | |
3442 | index. */ | |
3443 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
3444 | return 0; | |
3445 | ||
3446 | section = VEC_index (dwarf2_section_info_def, | |
3447 | dwarf2_per_objfile->types, 0); | |
3448 | ||
74a0d9f6 JK |
3449 | create_signatured_type_table_from_index (objfile, section, types_list, |
3450 | types_list_elements); | |
8b70b953 | 3451 | } |
9291a0cd | 3452 | |
2ec9a5e0 TT |
3453 | create_addrmap_from_index (objfile, &local_map); |
3454 | ||
8d749320 | 3455 | map = XOBNEW (&objfile->objfile_obstack, struct mapped_index); |
2ec9a5e0 | 3456 | *map = local_map; |
9291a0cd TT |
3457 | |
3458 | dwarf2_per_objfile->index_table = map; | |
3459 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
3460 | dwarf2_per_objfile->quick_file_names_table = |
3461 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
3462 | |
3463 | return 1; | |
3464 | } | |
3465 | ||
3466 | /* A helper for the "quick" functions which sets the global | |
3467 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 3468 | |
9291a0cd TT |
3469 | static void |
3470 | dw2_setup (struct objfile *objfile) | |
3471 | { | |
9a3c8263 SM |
3472 | dwarf2_per_objfile = ((struct dwarf2_per_objfile *) |
3473 | objfile_data (objfile, dwarf2_objfile_data_key)); | |
9291a0cd TT |
3474 | gdb_assert (dwarf2_per_objfile); |
3475 | } | |
3476 | ||
dee91e82 | 3477 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3478 | |
dee91e82 DE |
3479 | static void |
3480 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3481 | const gdb_byte *info_ptr, |
dee91e82 DE |
3482 | struct die_info *comp_unit_die, |
3483 | int has_children, | |
3484 | void *data) | |
9291a0cd | 3485 | { |
dee91e82 DE |
3486 | struct dwarf2_cu *cu = reader->cu; |
3487 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3488 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3489 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3490 | struct attribute *attr; |
dee91e82 | 3491 | int i; |
7b9f3c50 DE |
3492 | void **slot; |
3493 | struct quick_file_names *qfn; | |
9291a0cd | 3494 | |
0186c6a7 DE |
3495 | gdb_assert (! this_cu->is_debug_types); |
3496 | ||
07261596 TT |
3497 | /* Our callers never want to match partial units -- instead they |
3498 | will match the enclosing full CU. */ | |
3499 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3500 | { | |
3501 | this_cu->v.quick->no_file_data = 1; | |
3502 | return; | |
3503 | } | |
3504 | ||
0186c6a7 | 3505 | lh_cu = this_cu; |
7b9f3c50 | 3506 | slot = NULL; |
dee91e82 | 3507 | |
fff8551c | 3508 | line_header_up lh; |
9c541725 | 3509 | sect_offset line_offset {}; |
fff8551c | 3510 | |
dee91e82 | 3511 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
9291a0cd TT |
3512 | if (attr) |
3513 | { | |
7b9f3c50 DE |
3514 | struct quick_file_names find_entry; |
3515 | ||
9c541725 | 3516 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3517 | |
3518 | /* We may have already read in this line header (TU line header sharing). | |
3519 | If we have we're done. */ | |
094b34ac | 3520 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3521 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3522 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3523 | &find_entry, INSERT); | |
3524 | if (*slot != NULL) | |
3525 | { | |
9a3c8263 | 3526 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3527 | return; |
7b9f3c50 DE |
3528 | } |
3529 | ||
3019eac3 | 3530 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3531 | } |
3532 | if (lh == NULL) | |
3533 | { | |
094b34ac | 3534 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3535 | return; |
9291a0cd TT |
3536 | } |
3537 | ||
8d749320 | 3538 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3539 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3540 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3541 | gdb_assert (slot != NULL); |
3542 | *slot = qfn; | |
9291a0cd | 3543 | |
d721ba37 | 3544 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3545 | |
fff8551c | 3546 | qfn->num_file_names = lh->file_names.size (); |
8d749320 | 3547 | qfn->file_names = |
fff8551c PA |
3548 | XOBNEWVEC (&objfile->objfile_obstack, const char *, lh->file_names.size ()); |
3549 | for (i = 0; i < lh->file_names.size (); ++i) | |
3550 | qfn->file_names[i] = file_full_name (i + 1, lh.get (), fnd.comp_dir); | |
7b9f3c50 | 3551 | qfn->real_names = NULL; |
9291a0cd | 3552 | |
094b34ac | 3553 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3554 | } |
3555 | ||
3556 | /* A helper for the "quick" functions which attempts to read the line | |
3557 | table for THIS_CU. */ | |
3558 | ||
3559 | static struct quick_file_names * | |
e4a48d9d | 3560 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3561 | { |
0186c6a7 DE |
3562 | /* This should never be called for TUs. */ |
3563 | gdb_assert (! this_cu->is_debug_types); | |
3564 | /* Nor type unit groups. */ | |
3565 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3566 | |
dee91e82 DE |
3567 | if (this_cu->v.quick->file_names != NULL) |
3568 | return this_cu->v.quick->file_names; | |
3569 | /* If we know there is no line data, no point in looking again. */ | |
3570 | if (this_cu->v.quick->no_file_data) | |
3571 | return NULL; | |
3572 | ||
0186c6a7 | 3573 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3574 | |
3575 | if (this_cu->v.quick->no_file_data) | |
3576 | return NULL; | |
3577 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3578 | } |
3579 | ||
3580 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3581 | real path for a given file name from the line table. */ |
2fdf6df6 | 3582 | |
9291a0cd | 3583 | static const char * |
7b9f3c50 DE |
3584 | dw2_get_real_path (struct objfile *objfile, |
3585 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3586 | { |
7b9f3c50 DE |
3587 | if (qfn->real_names == NULL) |
3588 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3589 | qfn->num_file_names, const char *); |
9291a0cd | 3590 | |
7b9f3c50 | 3591 | if (qfn->real_names[index] == NULL) |
14278e1f | 3592 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3593 | |
7b9f3c50 | 3594 | return qfn->real_names[index]; |
9291a0cd TT |
3595 | } |
3596 | ||
3597 | static struct symtab * | |
3598 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3599 | { | |
43f3e411 | 3600 | struct compunit_symtab *cust; |
9291a0cd | 3601 | int index; |
ae2de4f8 | 3602 | |
9291a0cd TT |
3603 | dw2_setup (objfile); |
3604 | index = dwarf2_per_objfile->n_comp_units - 1; | |
43f3e411 DE |
3605 | cust = dw2_instantiate_symtab (dw2_get_cutu (index)); |
3606 | if (cust == NULL) | |
3607 | return NULL; | |
3608 | return compunit_primary_filetab (cust); | |
9291a0cd TT |
3609 | } |
3610 | ||
7b9f3c50 DE |
3611 | /* Traversal function for dw2_forget_cached_source_info. */ |
3612 | ||
3613 | static int | |
3614 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3615 | { |
7b9f3c50 | 3616 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3617 | |
7b9f3c50 | 3618 | if (file_data->real_names) |
9291a0cd | 3619 | { |
7b9f3c50 | 3620 | int i; |
9291a0cd | 3621 | |
7b9f3c50 | 3622 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3623 | { |
7b9f3c50 DE |
3624 | xfree ((void*) file_data->real_names[i]); |
3625 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3626 | } |
3627 | } | |
7b9f3c50 DE |
3628 | |
3629 | return 1; | |
3630 | } | |
3631 | ||
3632 | static void | |
3633 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3634 | { | |
3635 | dw2_setup (objfile); | |
3636 | ||
3637 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3638 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3639 | } |
3640 | ||
f8eba3c6 TT |
3641 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3642 | the symtabs and calls the iterator. */ | |
3643 | ||
3644 | static int | |
3645 | dw2_map_expand_apply (struct objfile *objfile, | |
3646 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3647 | const char *name, const char *real_path, |
14bc53a8 | 3648 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3649 | { |
43f3e411 | 3650 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3651 | |
3652 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3653 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3654 | return 0; |
3655 | ||
3656 | /* This may expand more than one symtab, and we want to iterate over | |
3657 | all of them. */ | |
a0f42c21 | 3658 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3659 | |
14bc53a8 PA |
3660 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3661 | last_made, callback); | |
f8eba3c6 TT |
3662 | } |
3663 | ||
3664 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3665 | ||
14bc53a8 PA |
3666 | static bool |
3667 | dw2_map_symtabs_matching_filename | |
3668 | (struct objfile *objfile, const char *name, const char *real_path, | |
3669 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd TT |
3670 | { |
3671 | int i; | |
c011a4f4 | 3672 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3673 | |
3674 | dw2_setup (objfile); | |
ae2de4f8 | 3675 | |
848e3e78 DE |
3676 | /* The rule is CUs specify all the files, including those used by |
3677 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3678 | |
848e3e78 | 3679 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3680 | { |
3681 | int j; | |
8832e7e3 | 3682 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3683 | struct quick_file_names *file_data; |
9291a0cd | 3684 | |
3d7bb9d9 | 3685 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3686 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3687 | continue; |
3688 | ||
e4a48d9d | 3689 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3690 | if (file_data == NULL) |
9291a0cd TT |
3691 | continue; |
3692 | ||
7b9f3c50 | 3693 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3694 | { |
7b9f3c50 | 3695 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3696 | const char *this_real_name; |
9291a0cd | 3697 | |
af529f8f | 3698 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3699 | { |
f5b95b50 | 3700 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3701 | callback)) |
3702 | return true; | |
288e77a7 | 3703 | continue; |
4aac40c8 | 3704 | } |
9291a0cd | 3705 | |
c011a4f4 DE |
3706 | /* Before we invoke realpath, which can get expensive when many |
3707 | files are involved, do a quick comparison of the basenames. */ | |
3708 | if (! basenames_may_differ | |
3709 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3710 | continue; | |
3711 | ||
da235a7c JK |
3712 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3713 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3714 | { |
da235a7c | 3715 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3716 | callback)) |
3717 | return true; | |
288e77a7 | 3718 | continue; |
da235a7c | 3719 | } |
9291a0cd | 3720 | |
da235a7c JK |
3721 | if (real_path != NULL) |
3722 | { | |
af529f8f JK |
3723 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3724 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3725 | if (this_real_name != NULL |
af529f8f | 3726 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3727 | { |
f5b95b50 | 3728 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3729 | callback)) |
3730 | return true; | |
288e77a7 | 3731 | continue; |
9291a0cd TT |
3732 | } |
3733 | } | |
3734 | } | |
3735 | } | |
3736 | ||
14bc53a8 | 3737 | return false; |
9291a0cd TT |
3738 | } |
3739 | ||
da51c347 DE |
3740 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3741 | ||
3742 | struct dw2_symtab_iterator | |
9291a0cd | 3743 | { |
da51c347 DE |
3744 | /* The internalized form of .gdb_index. */ |
3745 | struct mapped_index *index; | |
3746 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3747 | int want_specific_block; | |
3748 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3749 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3750 | int block_index; | |
3751 | /* The kind of symbol we're looking for. */ | |
3752 | domain_enum domain; | |
3753 | /* The list of CUs from the index entry of the symbol, | |
3754 | or NULL if not found. */ | |
3755 | offset_type *vec; | |
3756 | /* The next element in VEC to look at. */ | |
3757 | int next; | |
3758 | /* The number of elements in VEC, or zero if there is no match. */ | |
3759 | int length; | |
8943b874 DE |
3760 | /* Have we seen a global version of the symbol? |
3761 | If so we can ignore all further global instances. | |
3762 | This is to work around gold/15646, inefficient gold-generated | |
3763 | indices. */ | |
3764 | int global_seen; | |
da51c347 | 3765 | }; |
9291a0cd | 3766 | |
da51c347 DE |
3767 | /* Initialize the index symtab iterator ITER. |
3768 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3769 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3770 | |
9291a0cd | 3771 | static void |
da51c347 DE |
3772 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3773 | struct mapped_index *index, | |
3774 | int want_specific_block, | |
3775 | int block_index, | |
3776 | domain_enum domain, | |
3777 | const char *name) | |
3778 | { | |
3779 | iter->index = index; | |
3780 | iter->want_specific_block = want_specific_block; | |
3781 | iter->block_index = block_index; | |
3782 | iter->domain = domain; | |
3783 | iter->next = 0; | |
8943b874 | 3784 | iter->global_seen = 0; |
da51c347 DE |
3785 | |
3786 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3787 | iter->length = MAYBE_SWAP (*iter->vec); | |
3788 | else | |
3789 | { | |
3790 | iter->vec = NULL; | |
3791 | iter->length = 0; | |
3792 | } | |
3793 | } | |
3794 | ||
3795 | /* Return the next matching CU or NULL if there are no more. */ | |
3796 | ||
3797 | static struct dwarf2_per_cu_data * | |
3798 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3799 | { | |
3800 | for ( ; iter->next < iter->length; ++iter->next) | |
3801 | { | |
3802 | offset_type cu_index_and_attrs = | |
3803 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3804 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3805 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3806 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3807 | /* This value is only valid for index versions >= 7. */ | |
3808 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3809 | gdb_index_symbol_kind symbol_kind = | |
3810 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3811 | /* Only check the symbol attributes if they're present. | |
3812 | Indices prior to version 7 don't record them, | |
3813 | and indices >= 7 may elide them for certain symbols | |
3814 | (gold does this). */ | |
3815 | int attrs_valid = | |
3816 | (iter->index->version >= 7 | |
3817 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3818 | ||
3190f0c6 DE |
3819 | /* Don't crash on bad data. */ |
3820 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3821 | + dwarf2_per_objfile->n_type_units)) | |
3822 | { | |
3823 | complaint (&symfile_complaints, | |
3824 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3825 | " [in module %s]"), |
3826 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3827 | continue; |
3828 | } | |
3829 | ||
8832e7e3 | 3830 | per_cu = dw2_get_cutu (cu_index); |
3190f0c6 | 3831 | |
da51c347 | 3832 | /* Skip if already read in. */ |
43f3e411 | 3833 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3834 | continue; |
3835 | ||
8943b874 DE |
3836 | /* Check static vs global. */ |
3837 | if (attrs_valid) | |
3838 | { | |
3839 | if (iter->want_specific_block | |
3840 | && want_static != is_static) | |
3841 | continue; | |
3842 | /* Work around gold/15646. */ | |
3843 | if (!is_static && iter->global_seen) | |
3844 | continue; | |
3845 | if (!is_static) | |
3846 | iter->global_seen = 1; | |
3847 | } | |
da51c347 DE |
3848 | |
3849 | /* Only check the symbol's kind if it has one. */ | |
3850 | if (attrs_valid) | |
3851 | { | |
3852 | switch (iter->domain) | |
3853 | { | |
3854 | case VAR_DOMAIN: | |
3855 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3856 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3857 | /* Some types are also in VAR_DOMAIN. */ | |
3858 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3859 | continue; | |
3860 | break; | |
3861 | case STRUCT_DOMAIN: | |
3862 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3863 | continue; | |
3864 | break; | |
3865 | case LABEL_DOMAIN: | |
3866 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3867 | continue; | |
3868 | break; | |
3869 | default: | |
3870 | break; | |
3871 | } | |
3872 | } | |
3873 | ||
3874 | ++iter->next; | |
3875 | return per_cu; | |
3876 | } | |
3877 | ||
3878 | return NULL; | |
3879 | } | |
3880 | ||
43f3e411 | 3881 | static struct compunit_symtab * |
da51c347 DE |
3882 | dw2_lookup_symbol (struct objfile *objfile, int block_index, |
3883 | const char *name, domain_enum domain) | |
9291a0cd | 3884 | { |
43f3e411 | 3885 | struct compunit_symtab *stab_best = NULL; |
156942c7 DE |
3886 | struct mapped_index *index; |
3887 | ||
9291a0cd TT |
3888 | dw2_setup (objfile); |
3889 | ||
156942c7 DE |
3890 | index = dwarf2_per_objfile->index_table; |
3891 | ||
da51c347 | 3892 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3893 | if (index) |
9291a0cd | 3894 | { |
da51c347 DE |
3895 | struct dw2_symtab_iterator iter; |
3896 | struct dwarf2_per_cu_data *per_cu; | |
3897 | ||
3898 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3899 | |
da51c347 | 3900 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3901 | { |
b2e2f908 | 3902 | struct symbol *sym, *with_opaque = NULL; |
43f3e411 DE |
3903 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu); |
3904 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); | |
f194fefb | 3905 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3906 | |
b2e2f908 DE |
3907 | sym = block_find_symbol (block, name, domain, |
3908 | block_find_non_opaque_type_preferred, | |
3909 | &with_opaque); | |
3910 | ||
da51c347 DE |
3911 | /* Some caution must be observed with overloaded functions |
3912 | and methods, since the index will not contain any overload | |
3913 | information (but NAME might contain it). */ | |
da51c347 | 3914 | |
b2e2f908 | 3915 | if (sym != NULL |
a778f165 | 3916 | && SYMBOL_MATCHES_SEARCH_NAME (sym, name)) |
b2e2f908 DE |
3917 | return stab; |
3918 | if (with_opaque != NULL | |
a778f165 | 3919 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, name)) |
b2e2f908 | 3920 | stab_best = stab; |
da51c347 DE |
3921 | |
3922 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3923 | } |
3924 | } | |
9291a0cd | 3925 | |
da51c347 | 3926 | return stab_best; |
9291a0cd TT |
3927 | } |
3928 | ||
3929 | static void | |
3930 | dw2_print_stats (struct objfile *objfile) | |
3931 | { | |
e4a48d9d | 3932 | int i, total, count; |
9291a0cd TT |
3933 | |
3934 | dw2_setup (objfile); | |
e4a48d9d | 3935 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3936 | count = 0; |
e4a48d9d | 3937 | for (i = 0; i < total; ++i) |
9291a0cd | 3938 | { |
8832e7e3 | 3939 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 3940 | |
43f3e411 | 3941 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3942 | ++count; |
3943 | } | |
e4a48d9d | 3944 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3945 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3946 | } | |
3947 | ||
779bd270 DE |
3948 | /* This dumps minimal information about the index. |
3949 | It is called via "mt print objfiles". | |
3950 | One use is to verify .gdb_index has been loaded by the | |
3951 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3952 | ||
9291a0cd TT |
3953 | static void |
3954 | dw2_dump (struct objfile *objfile) | |
3955 | { | |
779bd270 DE |
3956 | dw2_setup (objfile); |
3957 | gdb_assert (dwarf2_per_objfile->using_index); | |
3958 | printf_filtered (".gdb_index:"); | |
3959 | if (dwarf2_per_objfile->index_table != NULL) | |
3960 | { | |
3961 | printf_filtered (" version %d\n", | |
3962 | dwarf2_per_objfile->index_table->version); | |
3963 | } | |
3964 | else | |
3965 | printf_filtered (" faked for \"readnow\"\n"); | |
3966 | printf_filtered ("\n"); | |
9291a0cd TT |
3967 | } |
3968 | ||
3969 | static void | |
3189cb12 DE |
3970 | dw2_relocate (struct objfile *objfile, |
3971 | const struct section_offsets *new_offsets, | |
3972 | const struct section_offsets *delta) | |
9291a0cd TT |
3973 | { |
3974 | /* There's nothing to relocate here. */ | |
3975 | } | |
3976 | ||
3977 | static void | |
3978 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3979 | const char *func_name) | |
3980 | { | |
da51c347 DE |
3981 | struct mapped_index *index; |
3982 | ||
3983 | dw2_setup (objfile); | |
3984 | ||
3985 | index = dwarf2_per_objfile->index_table; | |
3986 | ||
3987 | /* index is NULL if OBJF_READNOW. */ | |
3988 | if (index) | |
3989 | { | |
3990 | struct dw2_symtab_iterator iter; | |
3991 | struct dwarf2_per_cu_data *per_cu; | |
3992 | ||
3993 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3994 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3995 | func_name); | |
3996 | ||
3997 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3998 | dw2_instantiate_symtab (per_cu); | |
3999 | } | |
9291a0cd TT |
4000 | } |
4001 | ||
4002 | static void | |
4003 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4004 | { | |
4005 | int i; | |
4006 | ||
4007 | dw2_setup (objfile); | |
1fd400ff TT |
4008 | |
4009 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 4010 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4011 | { |
8832e7e3 | 4012 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4013 | |
a0f42c21 | 4014 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4015 | } |
4016 | } | |
4017 | ||
4018 | static void | |
652a8996 JK |
4019 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4020 | const char *fullname) | |
9291a0cd TT |
4021 | { |
4022 | int i; | |
4023 | ||
4024 | dw2_setup (objfile); | |
d4637a04 DE |
4025 | |
4026 | /* We don't need to consider type units here. | |
4027 | This is only called for examining code, e.g. expand_line_sal. | |
4028 | There can be an order of magnitude (or more) more type units | |
4029 | than comp units, and we avoid them if we can. */ | |
4030 | ||
4031 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
4032 | { |
4033 | int j; | |
8832e7e3 | 4034 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
7b9f3c50 | 4035 | struct quick_file_names *file_data; |
9291a0cd | 4036 | |
3d7bb9d9 | 4037 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4038 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4039 | continue; |
4040 | ||
e4a48d9d | 4041 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4042 | if (file_data == NULL) |
9291a0cd TT |
4043 | continue; |
4044 | ||
7b9f3c50 | 4045 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4046 | { |
652a8996 JK |
4047 | const char *this_fullname = file_data->file_names[j]; |
4048 | ||
4049 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4050 | { |
a0f42c21 | 4051 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
4052 | break; |
4053 | } | |
4054 | } | |
4055 | } | |
4056 | } | |
4057 | ||
9291a0cd | 4058 | static void |
ade7ed9e | 4059 | dw2_map_matching_symbols (struct objfile *objfile, |
fe978cb0 | 4060 | const char * name, domain_enum domain, |
ade7ed9e | 4061 | int global, |
40658b94 PH |
4062 | int (*callback) (struct block *, |
4063 | struct symbol *, void *), | |
2edb89d3 JK |
4064 | void *data, symbol_compare_ftype *match, |
4065 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 4066 | { |
40658b94 | 4067 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4068 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4069 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4070 | } |
4071 | ||
4072 | static void | |
f8eba3c6 TT |
4073 | dw2_expand_symtabs_matching |
4074 | (struct objfile *objfile, | |
14bc53a8 PA |
4075 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4076 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4077 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4078 | enum search_domain kind) | |
9291a0cd TT |
4079 | { |
4080 | int i; | |
4081 | offset_type iter; | |
4b5246aa | 4082 | struct mapped_index *index; |
9291a0cd TT |
4083 | |
4084 | dw2_setup (objfile); | |
ae2de4f8 DE |
4085 | |
4086 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
4087 | if (!dwarf2_per_objfile->index_table) |
4088 | return; | |
4b5246aa | 4089 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 4090 | |
7b08b9eb | 4091 | if (file_matcher != NULL) |
24c79950 | 4092 | { |
fc4007c9 TT |
4093 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, |
4094 | htab_eq_pointer, | |
4095 | NULL, xcalloc, xfree)); | |
4096 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
4097 | htab_eq_pointer, | |
4098 | NULL, xcalloc, xfree)); | |
24c79950 | 4099 | |
848e3e78 DE |
4100 | /* The rule is CUs specify all the files, including those used by |
4101 | any TU, so there's no need to scan TUs here. */ | |
4102 | ||
4103 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
4104 | { |
4105 | int j; | |
8832e7e3 | 4106 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
24c79950 TT |
4107 | struct quick_file_names *file_data; |
4108 | void **slot; | |
7b08b9eb | 4109 | |
61d96d7e DE |
4110 | QUIT; |
4111 | ||
24c79950 | 4112 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 4113 | |
24c79950 | 4114 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4115 | if (per_cu->v.quick->compunit_symtab) |
24c79950 | 4116 | continue; |
7b08b9eb | 4117 | |
e4a48d9d | 4118 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
4119 | if (file_data == NULL) |
4120 | continue; | |
7b08b9eb | 4121 | |
fc4007c9 | 4122 | if (htab_find (visited_not_found.get (), file_data) != NULL) |
24c79950 | 4123 | continue; |
fc4007c9 | 4124 | else if (htab_find (visited_found.get (), file_data) != NULL) |
24c79950 TT |
4125 | { |
4126 | per_cu->v.quick->mark = 1; | |
4127 | continue; | |
4128 | } | |
4129 | ||
4130 | for (j = 0; j < file_data->num_file_names; ++j) | |
4131 | { | |
da235a7c JK |
4132 | const char *this_real_name; |
4133 | ||
14bc53a8 | 4134 | if (file_matcher (file_data->file_names[j], false)) |
24c79950 TT |
4135 | { |
4136 | per_cu->v.quick->mark = 1; | |
4137 | break; | |
4138 | } | |
da235a7c JK |
4139 | |
4140 | /* Before we invoke realpath, which can get expensive when many | |
4141 | files are involved, do a quick comparison of the basenames. */ | |
4142 | if (!basenames_may_differ | |
4143 | && !file_matcher (lbasename (file_data->file_names[j]), | |
14bc53a8 | 4144 | true)) |
da235a7c JK |
4145 | continue; |
4146 | ||
4147 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
14bc53a8 | 4148 | if (file_matcher (this_real_name, false)) |
da235a7c JK |
4149 | { |
4150 | per_cu->v.quick->mark = 1; | |
4151 | break; | |
4152 | } | |
24c79950 TT |
4153 | } |
4154 | ||
4155 | slot = htab_find_slot (per_cu->v.quick->mark | |
fc4007c9 TT |
4156 | ? visited_found.get () |
4157 | : visited_not_found.get (), | |
24c79950 TT |
4158 | file_data, INSERT); |
4159 | *slot = file_data; | |
4160 | } | |
24c79950 | 4161 | } |
9291a0cd | 4162 | |
3876f04e | 4163 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
4164 | { |
4165 | offset_type idx = 2 * iter; | |
4166 | const char *name; | |
4167 | offset_type *vec, vec_len, vec_idx; | |
8943b874 | 4168 | int global_seen = 0; |
9291a0cd | 4169 | |
61d96d7e DE |
4170 | QUIT; |
4171 | ||
3876f04e | 4172 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
4173 | continue; |
4174 | ||
3876f04e | 4175 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 4176 | |
14bc53a8 | 4177 | if (!symbol_matcher (name)) |
9291a0cd TT |
4178 | continue; |
4179 | ||
4180 | /* The name was matched, now expand corresponding CUs that were | |
4181 | marked. */ | |
4b5246aa | 4182 | vec = (offset_type *) (index->constant_pool |
3876f04e | 4183 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
4184 | vec_len = MAYBE_SWAP (vec[0]); |
4185 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4186 | { | |
e254ef6a | 4187 | struct dwarf2_per_cu_data *per_cu; |
156942c7 | 4188 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
8943b874 DE |
4189 | /* This value is only valid for index versions >= 7. */ |
4190 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
156942c7 DE |
4191 | gdb_index_symbol_kind symbol_kind = |
4192 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4193 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
4194 | /* Only check the symbol attributes if they're present. |
4195 | Indices prior to version 7 don't record them, | |
4196 | and indices >= 7 may elide them for certain symbols | |
4197 | (gold does this). */ | |
4198 | int attrs_valid = | |
4199 | (index->version >= 7 | |
4200 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4201 | ||
8943b874 DE |
4202 | /* Work around gold/15646. */ |
4203 | if (attrs_valid) | |
4204 | { | |
4205 | if (!is_static && global_seen) | |
4206 | continue; | |
4207 | if (!is_static) | |
4208 | global_seen = 1; | |
4209 | } | |
4210 | ||
3190f0c6 DE |
4211 | /* Only check the symbol's kind if it has one. */ |
4212 | if (attrs_valid) | |
156942c7 DE |
4213 | { |
4214 | switch (kind) | |
4215 | { | |
4216 | case VARIABLES_DOMAIN: | |
4217 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4218 | continue; | |
4219 | break; | |
4220 | case FUNCTIONS_DOMAIN: | |
4221 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
4222 | continue; | |
4223 | break; | |
4224 | case TYPES_DOMAIN: | |
4225 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4226 | continue; | |
4227 | break; | |
4228 | default: | |
4229 | break; | |
4230 | } | |
4231 | } | |
4232 | ||
3190f0c6 DE |
4233 | /* Don't crash on bad data. */ |
4234 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
4235 | + dwarf2_per_objfile->n_type_units)) | |
4236 | { | |
4237 | complaint (&symfile_complaints, | |
4238 | _(".gdb_index entry has bad CU index" | |
4262abfb | 4239 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
4240 | continue; |
4241 | } | |
4242 | ||
8832e7e3 | 4243 | per_cu = dw2_get_cutu (cu_index); |
7b08b9eb | 4244 | if (file_matcher == NULL || per_cu->v.quick->mark) |
276d885b GB |
4245 | { |
4246 | int symtab_was_null = | |
4247 | (per_cu->v.quick->compunit_symtab == NULL); | |
4248 | ||
4249 | dw2_instantiate_symtab (per_cu); | |
4250 | ||
4251 | if (expansion_notify != NULL | |
4252 | && symtab_was_null | |
4253 | && per_cu->v.quick->compunit_symtab != NULL) | |
4254 | { | |
14bc53a8 | 4255 | expansion_notify (per_cu->v.quick->compunit_symtab); |
276d885b GB |
4256 | } |
4257 | } | |
9291a0cd TT |
4258 | } |
4259 | } | |
4260 | } | |
4261 | ||
43f3e411 | 4262 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific |
9703b513 TT |
4263 | symtab. */ |
4264 | ||
43f3e411 DE |
4265 | static struct compunit_symtab * |
4266 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4267 | CORE_ADDR pc) | |
9703b513 TT |
4268 | { |
4269 | int i; | |
4270 | ||
43f3e411 DE |
4271 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL |
4272 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4273 | return cust; | |
9703b513 | 4274 | |
43f3e411 | 4275 | if (cust->includes == NULL) |
a3ec0bb1 DE |
4276 | return NULL; |
4277 | ||
43f3e411 | 4278 | for (i = 0; cust->includes[i]; ++i) |
9703b513 | 4279 | { |
43f3e411 | 4280 | struct compunit_symtab *s = cust->includes[i]; |
9703b513 | 4281 | |
43f3e411 | 4282 | s = recursively_find_pc_sect_compunit_symtab (s, pc); |
9703b513 TT |
4283 | if (s != NULL) |
4284 | return s; | |
4285 | } | |
4286 | ||
4287 | return NULL; | |
4288 | } | |
4289 | ||
43f3e411 DE |
4290 | static struct compunit_symtab * |
4291 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4292 | struct bound_minimal_symbol msymbol, | |
4293 | CORE_ADDR pc, | |
4294 | struct obj_section *section, | |
4295 | int warn_if_readin) | |
9291a0cd TT |
4296 | { |
4297 | struct dwarf2_per_cu_data *data; | |
43f3e411 | 4298 | struct compunit_symtab *result; |
9291a0cd TT |
4299 | |
4300 | dw2_setup (objfile); | |
4301 | ||
4302 | if (!objfile->psymtabs_addrmap) | |
4303 | return NULL; | |
4304 | ||
9a3c8263 SM |
4305 | data = (struct dwarf2_per_cu_data *) addrmap_find (objfile->psymtabs_addrmap, |
4306 | pc); | |
9291a0cd TT |
4307 | if (!data) |
4308 | return NULL; | |
4309 | ||
43f3e411 | 4310 | if (warn_if_readin && data->v.quick->compunit_symtab) |
abebb8b0 | 4311 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
4312 | paddress (get_objfile_arch (objfile), pc)); |
4313 | ||
43f3e411 DE |
4314 | result |
4315 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data), | |
4316 | pc); | |
9703b513 TT |
4317 | gdb_assert (result != NULL); |
4318 | return result; | |
9291a0cd TT |
4319 | } |
4320 | ||
9291a0cd | 4321 | static void |
44b13c5a | 4322 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 4323 | void *data, int need_fullname) |
9291a0cd | 4324 | { |
9291a0cd | 4325 | dw2_setup (objfile); |
ae2de4f8 | 4326 | |
bbf2f4df | 4327 | if (!dwarf2_per_objfile->filenames_cache) |
24c79950 | 4328 | { |
bbf2f4df | 4329 | dwarf2_per_objfile->filenames_cache.emplace (); |
24c79950 | 4330 | |
bbf2f4df PA |
4331 | htab_up visited (htab_create_alloc (10, |
4332 | htab_hash_pointer, htab_eq_pointer, | |
4333 | NULL, xcalloc, xfree)); | |
24c79950 | 4334 | |
bbf2f4df PA |
4335 | /* The rule is CUs specify all the files, including those used |
4336 | by any TU, so there's no need to scan TUs here. We can | |
4337 | ignore file names coming from already-expanded CUs. */ | |
24c79950 | 4338 | |
bbf2f4df PA |
4339 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
4340 | { | |
4341 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); | |
9291a0cd | 4342 | |
bbf2f4df PA |
4343 | if (per_cu->v.quick->compunit_symtab) |
4344 | { | |
4345 | void **slot = htab_find_slot (visited.get (), | |
4346 | per_cu->v.quick->file_names, | |
4347 | INSERT); | |
9291a0cd | 4348 | |
bbf2f4df PA |
4349 | *slot = per_cu->v.quick->file_names; |
4350 | } | |
24c79950 | 4351 | } |
24c79950 | 4352 | |
bbf2f4df | 4353 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 4354 | { |
bbf2f4df PA |
4355 | int j; |
4356 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
4357 | struct quick_file_names *file_data; | |
4358 | void **slot; | |
4359 | ||
4360 | /* We only need to look at symtabs not already expanded. */ | |
4361 | if (per_cu->v.quick->compunit_symtab) | |
4362 | continue; | |
74e2f255 | 4363 | |
bbf2f4df PA |
4364 | file_data = dw2_get_file_names (per_cu); |
4365 | if (file_data == NULL) | |
4366 | continue; | |
4367 | ||
4368 | slot = htab_find_slot (visited.get (), file_data, INSERT); | |
4369 | if (*slot) | |
4370 | { | |
4371 | /* Already visited. */ | |
4372 | continue; | |
4373 | } | |
4374 | *slot = file_data; | |
4375 | ||
4376 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4377 | { | |
4378 | const char *filename = file_data->file_names[j]; | |
4379 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4380 | } | |
9291a0cd TT |
4381 | } |
4382 | } | |
bbf2f4df PA |
4383 | |
4384 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4385 | { | |
14278e1f | 4386 | gdb::unique_xmalloc_ptr<char> this_real_name; |
bbf2f4df PA |
4387 | |
4388 | if (need_fullname) | |
4389 | this_real_name = gdb_realpath (filename); | |
14278e1f | 4390 | (*fun) (filename, this_real_name.get (), data); |
bbf2f4df | 4391 | }); |
9291a0cd TT |
4392 | } |
4393 | ||
4394 | static int | |
4395 | dw2_has_symbols (struct objfile *objfile) | |
4396 | { | |
4397 | return 1; | |
4398 | } | |
4399 | ||
4400 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4401 | { | |
4402 | dw2_has_symbols, | |
4403 | dw2_find_last_source_symtab, | |
4404 | dw2_forget_cached_source_info, | |
f8eba3c6 | 4405 | dw2_map_symtabs_matching_filename, |
9291a0cd | 4406 | dw2_lookup_symbol, |
9291a0cd TT |
4407 | dw2_print_stats, |
4408 | dw2_dump, | |
4409 | dw2_relocate, | |
4410 | dw2_expand_symtabs_for_function, | |
4411 | dw2_expand_all_symtabs, | |
652a8996 | 4412 | dw2_expand_symtabs_with_fullname, |
40658b94 | 4413 | dw2_map_matching_symbols, |
9291a0cd | 4414 | dw2_expand_symtabs_matching, |
43f3e411 | 4415 | dw2_find_pc_sect_compunit_symtab, |
9291a0cd TT |
4416 | dw2_map_symbol_filenames |
4417 | }; | |
4418 | ||
4419 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
4420 | file will use psymtabs, or 1 if using the GNU index. */ | |
4421 | ||
4422 | int | |
4423 | dwarf2_initialize_objfile (struct objfile *objfile) | |
4424 | { | |
4425 | /* If we're about to read full symbols, don't bother with the | |
4426 | indices. In this case we also don't care if some other debug | |
4427 | format is making psymtabs, because they are all about to be | |
4428 | expanded anyway. */ | |
4429 | if ((objfile->flags & OBJF_READNOW)) | |
4430 | { | |
4431 | int i; | |
4432 | ||
4433 | dwarf2_per_objfile->using_index = 1; | |
4434 | create_all_comp_units (objfile); | |
0e50663e | 4435 | create_all_type_units (objfile); |
7b9f3c50 DE |
4436 | dwarf2_per_objfile->quick_file_names_table = |
4437 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 4438 | |
1fd400ff | 4439 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 4440 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 4441 | { |
8832e7e3 | 4442 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
9291a0cd | 4443 | |
e254ef6a DE |
4444 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
4445 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
4446 | } |
4447 | ||
4448 | /* Return 1 so that gdb sees the "quick" functions. However, | |
4449 | these functions will be no-ops because we will have expanded | |
4450 | all symtabs. */ | |
4451 | return 1; | |
4452 | } | |
4453 | ||
4454 | if (dwarf2_read_index (objfile)) | |
4455 | return 1; | |
4456 | ||
9291a0cd TT |
4457 | return 0; |
4458 | } | |
4459 | ||
4460 | \f | |
4461 | ||
dce234bc PP |
4462 | /* Build a partial symbol table. */ |
4463 | ||
4464 | void | |
f29dff0a | 4465 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 4466 | { |
c9bf0622 | 4467 | |
f29dff0a | 4468 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
4469 | { |
4470 | init_psymbol_list (objfile, 1024); | |
4471 | } | |
4472 | ||
492d29ea | 4473 | TRY |
c9bf0622 TT |
4474 | { |
4475 | /* This isn't really ideal: all the data we allocate on the | |
4476 | objfile's obstack is still uselessly kept around. However, | |
4477 | freeing it seems unsafe. */ | |
906768f9 | 4478 | psymtab_discarder psymtabs (objfile); |
c9bf0622 | 4479 | dwarf2_build_psymtabs_hard (objfile); |
906768f9 | 4480 | psymtabs.keep (); |
c9bf0622 | 4481 | } |
492d29ea PA |
4482 | CATCH (except, RETURN_MASK_ERROR) |
4483 | { | |
4484 | exception_print (gdb_stderr, except); | |
4485 | } | |
4486 | END_CATCH | |
c906108c | 4487 | } |
c906108c | 4488 | |
1ce1cefd DE |
4489 | /* Return the total length of the CU described by HEADER. */ |
4490 | ||
4491 | static unsigned int | |
4492 | get_cu_length (const struct comp_unit_head *header) | |
4493 | { | |
4494 | return header->initial_length_size + header->length; | |
4495 | } | |
4496 | ||
9c541725 | 4497 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 4498 | |
9c541725 PA |
4499 | static inline bool |
4500 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 4501 | { |
9c541725 PA |
4502 | sect_offset bottom = cu_header->sect_off; |
4503 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 4504 | |
9c541725 | 4505 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
4506 | } |
4507 | ||
3b80fe9b DE |
4508 | /* Find the base address of the compilation unit for range lists and |
4509 | location lists. It will normally be specified by DW_AT_low_pc. | |
4510 | In DWARF-3 draft 4, the base address could be overridden by | |
4511 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
4512 | compilation units with discontinuous ranges. */ | |
4513 | ||
4514 | static void | |
4515 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
4516 | { | |
4517 | struct attribute *attr; | |
4518 | ||
4519 | cu->base_known = 0; | |
4520 | cu->base_address = 0; | |
4521 | ||
4522 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
4523 | if (attr) | |
4524 | { | |
31aa7e4e | 4525 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4526 | cu->base_known = 1; |
4527 | } | |
4528 | else | |
4529 | { | |
4530 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4531 | if (attr) | |
4532 | { | |
31aa7e4e | 4533 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
4534 | cu->base_known = 1; |
4535 | } | |
4536 | } | |
4537 | } | |
4538 | ||
93311388 | 4539 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 4540 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
4541 | NOTE: This leaves members offset, first_die_offset to be filled in |
4542 | by the caller. */ | |
107d2387 | 4543 | |
d521ce57 | 4544 | static const gdb_byte * |
107d2387 | 4545 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
4546 | const gdb_byte *info_ptr, |
4547 | struct dwarf2_section_info *section, | |
4548 | rcuh_kind section_kind) | |
107d2387 AC |
4549 | { |
4550 | int signed_addr; | |
891d2f0b | 4551 | unsigned int bytes_read; |
43988095 JK |
4552 | const char *filename = get_section_file_name (section); |
4553 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
4554 | |
4555 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4556 | cu_header->initial_length_size = bytes_read; | |
4557 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4558 | info_ptr += bytes_read; |
107d2387 AC |
4559 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4560 | info_ptr += 2; | |
43988095 JK |
4561 | if (cu_header->version < 5) |
4562 | switch (section_kind) | |
4563 | { | |
4564 | case rcuh_kind::COMPILE: | |
4565 | cu_header->unit_type = DW_UT_compile; | |
4566 | break; | |
4567 | case rcuh_kind::TYPE: | |
4568 | cu_header->unit_type = DW_UT_type; | |
4569 | break; | |
4570 | default: | |
4571 | internal_error (__FILE__, __LINE__, | |
4572 | _("read_comp_unit_head: invalid section_kind")); | |
4573 | } | |
4574 | else | |
4575 | { | |
4576 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
4577 | (read_1_byte (abfd, info_ptr)); | |
4578 | info_ptr += 1; | |
4579 | switch (cu_header->unit_type) | |
4580 | { | |
4581 | case DW_UT_compile: | |
4582 | if (section_kind != rcuh_kind::COMPILE) | |
4583 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
4584 | "(is DW_UT_compile, should be DW_UT_type) [in module %s]"), | |
4585 | filename); | |
4586 | break; | |
4587 | case DW_UT_type: | |
4588 | section_kind = rcuh_kind::TYPE; | |
4589 | break; | |
4590 | default: | |
4591 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
4592 | "(is %d, should be %d or %d) [in module %s]"), | |
4593 | cu_header->unit_type, DW_UT_compile, DW_UT_type, filename); | |
4594 | } | |
4595 | ||
4596 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
4597 | info_ptr += 1; | |
4598 | } | |
9c541725 PA |
4599 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
4600 | cu_header, | |
4601 | &bytes_read); | |
613e1657 | 4602 | info_ptr += bytes_read; |
43988095 JK |
4603 | if (cu_header->version < 5) |
4604 | { | |
4605 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
4606 | info_ptr += 1; | |
4607 | } | |
107d2387 AC |
4608 | signed_addr = bfd_get_sign_extend_vma (abfd); |
4609 | if (signed_addr < 0) | |
8e65ff28 | 4610 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4611 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4612 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4613 | |
43988095 JK |
4614 | if (section_kind == rcuh_kind::TYPE) |
4615 | { | |
4616 | LONGEST type_offset; | |
4617 | ||
4618 | cu_header->signature = read_8_bytes (abfd, info_ptr); | |
4619 | info_ptr += 8; | |
4620 | ||
4621 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); | |
4622 | info_ptr += bytes_read; | |
9c541725 PA |
4623 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
4624 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
4625 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
4626 | "header (is %s) [in module %s]"), plongest (type_offset), | |
4627 | filename); | |
4628 | } | |
4629 | ||
107d2387 AC |
4630 | return info_ptr; |
4631 | } | |
4632 | ||
36586728 TT |
4633 | /* Helper function that returns the proper abbrev section for |
4634 | THIS_CU. */ | |
4635 | ||
4636 | static struct dwarf2_section_info * | |
4637 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4638 | { | |
4639 | struct dwarf2_section_info *abbrev; | |
4640 | ||
4641 | if (this_cu->is_dwz) | |
4642 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4643 | else | |
4644 | abbrev = &dwarf2_per_objfile->abbrev; | |
4645 | ||
4646 | return abbrev; | |
4647 | } | |
4648 | ||
9ff913ba DE |
4649 | /* Subroutine of read_and_check_comp_unit_head and |
4650 | read_and_check_type_unit_head to simplify them. | |
4651 | Perform various error checking on the header. */ | |
4652 | ||
4653 | static void | |
4654 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4655 | struct dwarf2_section_info *section, |
4656 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4657 | { |
a32a8923 | 4658 | const char *filename = get_section_file_name (section); |
9ff913ba | 4659 | |
43988095 | 4660 | if (header->version < 2 || header->version > 5) |
9ff913ba | 4661 | error (_("Dwarf Error: wrong version in compilation unit header " |
43988095 | 4662 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header->version, |
9ff913ba DE |
4663 | filename); |
4664 | ||
9c541725 | 4665 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 4666 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9c541725 PA |
4667 | error (_("Dwarf Error: bad offset (0x%x) in compilation unit header " |
4668 | "(offset 0x%x + 6) [in module %s]"), | |
4669 | to_underlying (header->abbrev_sect_off), | |
4670 | to_underlying (header->sect_off), | |
9ff913ba DE |
4671 | filename); |
4672 | ||
9c541725 | 4673 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 4674 | avoid potential 32-bit overflow. */ |
9c541725 | 4675 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 4676 | > section->size) |
9c541725 PA |
4677 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
4678 | "(offset 0x%x + 0) [in module %s]"), | |
4679 | header->length, to_underlying (header->sect_off), | |
9ff913ba DE |
4680 | filename); |
4681 | } | |
4682 | ||
4683 | /* Read in a CU/TU header and perform some basic error checking. | |
4684 | The contents of the header are stored in HEADER. | |
4685 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4686 | |
d521ce57 | 4687 | static const gdb_byte * |
9ff913ba DE |
4688 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4689 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4690 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4691 | const gdb_byte *info_ptr, |
43988095 | 4692 | rcuh_kind section_kind) |
72bf9492 | 4693 | { |
d521ce57 | 4694 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4695 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4696 | |
9c541725 | 4697 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 4698 | |
43988095 | 4699 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 4700 | |
9c541725 | 4701 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 4702 | |
4bdcc0c1 | 4703 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4704 | |
4705 | return info_ptr; | |
348e048f DE |
4706 | } |
4707 | ||
f4dc4d17 DE |
4708 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4709 | ||
4710 | static sect_offset | |
4711 | read_abbrev_offset (struct dwarf2_section_info *section, | |
9c541725 | 4712 | sect_offset sect_off) |
f4dc4d17 | 4713 | { |
a32a8923 | 4714 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4715 | const gdb_byte *info_ptr; |
ac298888 | 4716 | unsigned int initial_length_size, offset_size; |
43988095 | 4717 | uint16_t version; |
f4dc4d17 DE |
4718 | |
4719 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 4720 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 4721 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 4722 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
4723 | info_ptr += initial_length_size; |
4724 | ||
4725 | version = read_2_bytes (abfd, info_ptr); | |
4726 | info_ptr += 2; | |
4727 | if (version >= 5) | |
4728 | { | |
4729 | /* Skip unit type and address size. */ | |
4730 | info_ptr += 2; | |
4731 | } | |
4732 | ||
9c541725 | 4733 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
4734 | } |
4735 | ||
aaa75496 JB |
4736 | /* Allocate a new partial symtab for file named NAME and mark this new |
4737 | partial symtab as being an include of PST. */ | |
4738 | ||
4739 | static void | |
d521ce57 | 4740 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4741 | struct objfile *objfile) |
4742 | { | |
4743 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4744 | ||
fbd9ab74 JK |
4745 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4746 | { | |
4747 | /* It shares objfile->objfile_obstack. */ | |
4748 | subpst->dirname = pst->dirname; | |
4749 | } | |
4750 | ||
aaa75496 JB |
4751 | subpst->textlow = 0; |
4752 | subpst->texthigh = 0; | |
4753 | ||
8d749320 SM |
4754 | subpst->dependencies |
4755 | = XOBNEW (&objfile->objfile_obstack, struct partial_symtab *); | |
aaa75496 JB |
4756 | subpst->dependencies[0] = pst; |
4757 | subpst->number_of_dependencies = 1; | |
4758 | ||
4759 | subpst->globals_offset = 0; | |
4760 | subpst->n_global_syms = 0; | |
4761 | subpst->statics_offset = 0; | |
4762 | subpst->n_static_syms = 0; | |
43f3e411 | 4763 | subpst->compunit_symtab = NULL; |
aaa75496 JB |
4764 | subpst->read_symtab = pst->read_symtab; |
4765 | subpst->readin = 0; | |
4766 | ||
4767 | /* No private part is necessary for include psymtabs. This property | |
4768 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4769 | the regular ones. */ |
58a9656e | 4770 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4771 | } |
4772 | ||
4773 | /* Read the Line Number Program data and extract the list of files | |
4774 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4775 | partial symtab for each of these included files. */ |
aaa75496 JB |
4776 | |
4777 | static void | |
4778 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4779 | struct die_info *die, |
4780 | struct partial_symtab *pst) | |
aaa75496 | 4781 | { |
fff8551c | 4782 | line_header_up lh; |
d85a05f0 | 4783 | struct attribute *attr; |
aaa75496 | 4784 | |
d85a05f0 DJ |
4785 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4786 | if (attr) | |
9c541725 | 4787 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
4788 | if (lh == NULL) |
4789 | return; /* No linetable, so no includes. */ | |
4790 | ||
c6da4cef | 4791 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
fff8551c | 4792 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, pst->textlow, 1); |
aaa75496 JB |
4793 | } |
4794 | ||
348e048f | 4795 | static hashval_t |
52dc124a | 4796 | hash_signatured_type (const void *item) |
348e048f | 4797 | { |
9a3c8263 SM |
4798 | const struct signatured_type *sig_type |
4799 | = (const struct signatured_type *) item; | |
9a619af0 | 4800 | |
348e048f | 4801 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4802 | return sig_type->signature; |
348e048f DE |
4803 | } |
4804 | ||
4805 | static int | |
52dc124a | 4806 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 4807 | { |
9a3c8263 SM |
4808 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
4809 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 4810 | |
348e048f DE |
4811 | return lhs->signature == rhs->signature; |
4812 | } | |
4813 | ||
1fd400ff TT |
4814 | /* Allocate a hash table for signatured types. */ |
4815 | ||
4816 | static htab_t | |
673bfd45 | 4817 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4818 | { |
4819 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4820 | hash_signatured_type, |
4821 | eq_signatured_type, | |
1fd400ff TT |
4822 | NULL, |
4823 | &objfile->objfile_obstack, | |
4824 | hashtab_obstack_allocate, | |
4825 | dummy_obstack_deallocate); | |
4826 | } | |
4827 | ||
d467dd73 | 4828 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4829 | |
4830 | static int | |
d467dd73 | 4831 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 4832 | { |
9a3c8263 SM |
4833 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
4834 | struct signatured_type ***datap = (struct signatured_type ***) datum; | |
1fd400ff | 4835 | |
b4dd5633 | 4836 | **datap = sigt; |
1fd400ff TT |
4837 | ++*datap; |
4838 | ||
4839 | return 1; | |
4840 | } | |
4841 | ||
78d4d2c5 | 4842 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
4843 | and fill them into TYPES_HTAB. It will process only type units, |
4844 | therefore DW_UT_type. */ | |
c88ee1f0 | 4845 | |
78d4d2c5 JK |
4846 | static void |
4847 | create_debug_type_hash_table (struct dwo_file *dwo_file, | |
43988095 JK |
4848 | dwarf2_section_info *section, htab_t &types_htab, |
4849 | rcuh_kind section_kind) | |
348e048f | 4850 | { |
3019eac3 | 4851 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 4852 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
4853 | bfd *abfd; |
4854 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 4855 | |
4bdcc0c1 DE |
4856 | abbrev_section = (dwo_file != NULL |
4857 | ? &dwo_file->sections.abbrev | |
4858 | : &dwarf2_per_objfile->abbrev); | |
4859 | ||
b4f54984 | 4860 | if (dwarf_read_debug) |
43988095 JK |
4861 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
4862 | get_section_name (section), | |
a32a8923 | 4863 | get_section_file_name (abbrev_section)); |
09406207 | 4864 | |
78d4d2c5 JK |
4865 | dwarf2_read_section (objfile, section); |
4866 | info_ptr = section->buffer; | |
348e048f | 4867 | |
78d4d2c5 JK |
4868 | if (info_ptr == NULL) |
4869 | return; | |
348e048f | 4870 | |
78d4d2c5 JK |
4871 | /* We can't set abfd until now because the section may be empty or |
4872 | not present, in which case the bfd is unknown. */ | |
4873 | abfd = get_section_bfd_owner (section); | |
348e048f | 4874 | |
78d4d2c5 JK |
4875 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4876 | because we don't need to read any dies: the signature is in the | |
4877 | header. */ | |
3019eac3 | 4878 | |
78d4d2c5 JK |
4879 | end_ptr = info_ptr + section->size; |
4880 | while (info_ptr < end_ptr) | |
4881 | { | |
78d4d2c5 JK |
4882 | struct signatured_type *sig_type; |
4883 | struct dwo_unit *dwo_tu; | |
4884 | void **slot; | |
4885 | const gdb_byte *ptr = info_ptr; | |
4886 | struct comp_unit_head header; | |
4887 | unsigned int length; | |
8b70b953 | 4888 | |
9c541725 | 4889 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 4890 | |
a49dd8dd JK |
4891 | /* Initialize it due to a false compiler warning. */ |
4892 | header.signature = -1; | |
9c541725 | 4893 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 4894 | |
78d4d2c5 JK |
4895 | /* We need to read the type's signature in order to build the hash |
4896 | table, but we don't need anything else just yet. */ | |
348e048f | 4897 | |
43988095 JK |
4898 | ptr = read_and_check_comp_unit_head (&header, section, |
4899 | abbrev_section, ptr, section_kind); | |
348e048f | 4900 | |
78d4d2c5 | 4901 | length = get_cu_length (&header); |
6caca83c | 4902 | |
78d4d2c5 JK |
4903 | /* Skip dummy type units. */ |
4904 | if (ptr >= info_ptr + length | |
43988095 JK |
4905 | || peek_abbrev_code (abfd, ptr) == 0 |
4906 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
4907 | { |
4908 | info_ptr += length; | |
4909 | continue; | |
4910 | } | |
dee91e82 | 4911 | |
78d4d2c5 JK |
4912 | if (types_htab == NULL) |
4913 | { | |
4914 | if (dwo_file) | |
4915 | types_htab = allocate_dwo_unit_table (objfile); | |
4916 | else | |
4917 | types_htab = allocate_signatured_type_table (objfile); | |
4918 | } | |
8b70b953 | 4919 | |
78d4d2c5 JK |
4920 | if (dwo_file) |
4921 | { | |
4922 | sig_type = NULL; | |
4923 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4924 | struct dwo_unit); | |
4925 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 4926 | dwo_tu->signature = header.signature; |
9c541725 | 4927 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 4928 | dwo_tu->section = section; |
9c541725 | 4929 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
4930 | dwo_tu->length = length; |
4931 | } | |
4932 | else | |
4933 | { | |
4934 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4935 | The real type_offset is in the DWO file. */ | |
4936 | dwo_tu = NULL; | |
4937 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4938 | struct signatured_type); | |
43988095 | 4939 | sig_type->signature = header.signature; |
9c541725 | 4940 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 JK |
4941 | sig_type->per_cu.objfile = objfile; |
4942 | sig_type->per_cu.is_debug_types = 1; | |
4943 | sig_type->per_cu.section = section; | |
9c541725 | 4944 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
4945 | sig_type->per_cu.length = length; |
4946 | } | |
4947 | ||
4948 | slot = htab_find_slot (types_htab, | |
4949 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4950 | INSERT); | |
4951 | gdb_assert (slot != NULL); | |
4952 | if (*slot != NULL) | |
4953 | { | |
9c541725 | 4954 | sect_offset dup_sect_off; |
0349ea22 | 4955 | |
3019eac3 DE |
4956 | if (dwo_file) |
4957 | { | |
78d4d2c5 JK |
4958 | const struct dwo_unit *dup_tu |
4959 | = (const struct dwo_unit *) *slot; | |
4960 | ||
9c541725 | 4961 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
4962 | } |
4963 | else | |
4964 | { | |
78d4d2c5 JK |
4965 | const struct signatured_type *dup_tu |
4966 | = (const struct signatured_type *) *slot; | |
4967 | ||
9c541725 | 4968 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 4969 | } |
8b70b953 | 4970 | |
78d4d2c5 JK |
4971 | complaint (&symfile_complaints, |
4972 | _("debug type entry at offset 0x%x is duplicate to" | |
4973 | " the entry at offset 0x%x, signature %s"), | |
9c541725 | 4974 | to_underlying (sect_off), to_underlying (dup_sect_off), |
43988095 | 4975 | hex_string (header.signature)); |
78d4d2c5 JK |
4976 | } |
4977 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 4978 | |
78d4d2c5 JK |
4979 | if (dwarf_read_debug > 1) |
4980 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", | |
9c541725 | 4981 | to_underlying (sect_off), |
43988095 | 4982 | hex_string (header.signature)); |
3019eac3 | 4983 | |
78d4d2c5 JK |
4984 | info_ptr += length; |
4985 | } | |
4986 | } | |
3019eac3 | 4987 | |
78d4d2c5 JK |
4988 | /* Create the hash table of all entries in the .debug_types |
4989 | (or .debug_types.dwo) section(s). | |
4990 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4991 | otherwise it is NULL. | |
b3c8eb43 | 4992 | |
78d4d2c5 | 4993 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 4994 | |
78d4d2c5 | 4995 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 4996 | |
78d4d2c5 JK |
4997 | static void |
4998 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4999 | VEC (dwarf2_section_info_def) *types, | |
5000 | htab_t &types_htab) | |
5001 | { | |
5002 | int ix; | |
5003 | struct dwarf2_section_info *section; | |
5004 | ||
5005 | if (VEC_empty (dwarf2_section_info_def, types)) | |
5006 | return; | |
348e048f | 5007 | |
78d4d2c5 JK |
5008 | for (ix = 0; |
5009 | VEC_iterate (dwarf2_section_info_def, types, ix, section); | |
5010 | ++ix) | |
43988095 JK |
5011 | create_debug_type_hash_table (dwo_file, section, types_htab, |
5012 | rcuh_kind::TYPE); | |
3019eac3 DE |
5013 | } |
5014 | ||
5015 | /* Create the hash table of all entries in the .debug_types section, | |
5016 | and initialize all_type_units. | |
5017 | The result is zero if there is an error (e.g. missing .debug_types section), | |
5018 | otherwise non-zero. */ | |
5019 | ||
5020 | static int | |
5021 | create_all_type_units (struct objfile *objfile) | |
5022 | { | |
78d4d2c5 | 5023 | htab_t types_htab = NULL; |
b4dd5633 | 5024 | struct signatured_type **iter; |
3019eac3 | 5025 | |
43988095 JK |
5026 | create_debug_type_hash_table (NULL, &dwarf2_per_objfile->info, types_htab, |
5027 | rcuh_kind::COMPILE); | |
78d4d2c5 | 5028 | create_debug_types_hash_table (NULL, dwarf2_per_objfile->types, types_htab); |
3019eac3 DE |
5029 | if (types_htab == NULL) |
5030 | { | |
5031 | dwarf2_per_objfile->signatured_types = NULL; | |
5032 | return 0; | |
5033 | } | |
5034 | ||
348e048f DE |
5035 | dwarf2_per_objfile->signatured_types = types_htab; |
5036 | ||
6aa5f3a6 DE |
5037 | dwarf2_per_objfile->n_type_units |
5038 | = dwarf2_per_objfile->n_allocated_type_units | |
5039 | = htab_elements (types_htab); | |
8d749320 SM |
5040 | dwarf2_per_objfile->all_type_units = |
5041 | XNEWVEC (struct signatured_type *, dwarf2_per_objfile->n_type_units); | |
d467dd73 DE |
5042 | iter = &dwarf2_per_objfile->all_type_units[0]; |
5043 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
5044 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
5045 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 5046 | |
348e048f DE |
5047 | return 1; |
5048 | } | |
5049 | ||
6aa5f3a6 DE |
5050 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
5051 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
5052 | Otherwise we find one. */ | |
5053 | ||
5054 | static struct signatured_type * | |
5055 | add_type_unit (ULONGEST sig, void **slot) | |
5056 | { | |
5057 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5058 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
5059 | struct signatured_type *sig_type; | |
5060 | ||
5061 | gdb_assert (n_type_units <= dwarf2_per_objfile->n_allocated_type_units); | |
5062 | ++n_type_units; | |
5063 | if (n_type_units > dwarf2_per_objfile->n_allocated_type_units) | |
5064 | { | |
5065 | if (dwarf2_per_objfile->n_allocated_type_units == 0) | |
5066 | dwarf2_per_objfile->n_allocated_type_units = 1; | |
5067 | dwarf2_per_objfile->n_allocated_type_units *= 2; | |
5068 | dwarf2_per_objfile->all_type_units | |
224c3ddb SM |
5069 | = XRESIZEVEC (struct signatured_type *, |
5070 | dwarf2_per_objfile->all_type_units, | |
5071 | dwarf2_per_objfile->n_allocated_type_units); | |
6aa5f3a6 DE |
5072 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; |
5073 | } | |
5074 | dwarf2_per_objfile->n_type_units = n_type_units; | |
5075 | ||
5076 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5077 | struct signatured_type); | |
5078 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
5079 | sig_type->signature = sig; | |
5080 | sig_type->per_cu.is_debug_types = 1; | |
5081 | if (dwarf2_per_objfile->using_index) | |
5082 | { | |
5083 | sig_type->per_cu.v.quick = | |
5084 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5085 | struct dwarf2_per_cu_quick_data); | |
5086 | } | |
5087 | ||
5088 | if (slot == NULL) | |
5089 | { | |
5090 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5091 | sig_type, INSERT); | |
5092 | } | |
5093 | gdb_assert (*slot == NULL); | |
5094 | *slot = sig_type; | |
5095 | /* The rest of sig_type must be filled in by the caller. */ | |
5096 | return sig_type; | |
5097 | } | |
5098 | ||
a2ce51a0 DE |
5099 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5100 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5101 | ||
5102 | static void | |
5103 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
5104 | struct signatured_type *sig_entry, | |
5105 | struct dwo_unit *dwo_entry) | |
5106 | { | |
7ee85ab1 | 5107 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
5108 | gdb_assert (! sig_entry->per_cu.queued); |
5109 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
5110 | if (dwarf2_per_objfile->using_index) |
5111 | { | |
5112 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 5113 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
5114 | } |
5115 | else | |
5116 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 5117 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5118 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5119 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5120 | gdb_assert (sig_entry->dwo_unit == NULL); |
5121 | ||
5122 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 5123 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
5124 | sig_entry->per_cu.length = dwo_entry->length; |
5125 | sig_entry->per_cu.reading_dwo_directly = 1; | |
5126 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
5127 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5128 | sig_entry->dwo_unit = dwo_entry; | |
5129 | } | |
5130 | ||
5131 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5132 | If we haven't read the TU yet, create the signatured_type data structure |
5133 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5134 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5135 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5136 | containing that CU. Otherwise we could end up reading several other DWO | |
5137 | files (due to comdat folding) to process the transitive closure of all the | |
5138 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5139 | type signature that it needs. | |
a2ce51a0 DE |
5140 | We only do this for .gdb_index because in the psymtab case we already have |
5141 | to read all the DWOs to build the type unit groups. */ | |
5142 | ||
5143 | static struct signatured_type * | |
5144 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5145 | { | |
5146 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5147 | struct dwo_file *dwo_file; | |
5148 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5149 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5150 | void **slot; |
a2ce51a0 DE |
5151 | |
5152 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5153 | ||
6aa5f3a6 DE |
5154 | /* If TU skeletons have been removed then we may not have read in any |
5155 | TUs yet. */ | |
5156 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5157 | { | |
5158 | dwarf2_per_objfile->signatured_types | |
5159 | = allocate_signatured_type_table (objfile); | |
5160 | } | |
a2ce51a0 DE |
5161 | |
5162 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5163 | Use the global signatured_types array to do our own comdat-folding |
5164 | of types. If this is the first time we're reading this TU, and | |
5165 | the TU has an entry in .gdb_index, replace the recorded data from | |
5166 | .gdb_index with this TU. */ | |
a2ce51a0 | 5167 | |
a2ce51a0 | 5168 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
5169 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
5170 | &find_sig_entry, INSERT); | |
9a3c8263 | 5171 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5172 | |
5173 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5174 | read. Don't reassign the global entry to point to this DWO if that's |
5175 | the case. Also note that if the TU is already being read, it may not | |
5176 | have come from a DWO, the program may be a mix of Fission-compiled | |
5177 | code and non-Fission-compiled code. */ | |
5178 | ||
5179 | /* Have we already tried to read this TU? | |
5180 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5181 | needn't exist in the global table yet). */ | |
5182 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
5183 | return sig_entry; |
5184 | ||
6aa5f3a6 DE |
5185 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
5186 | dwo_unit of the TU itself. */ | |
5187 | dwo_file = cu->dwo_unit->dwo_file; | |
5188 | ||
a2ce51a0 DE |
5189 | /* Ok, this is the first time we're reading this TU. */ |
5190 | if (dwo_file->tus == NULL) | |
5191 | return NULL; | |
5192 | find_dwo_entry.signature = sig; | |
9a3c8263 | 5193 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
5194 | if (dwo_entry == NULL) |
5195 | return NULL; | |
5196 | ||
6aa5f3a6 DE |
5197 | /* If the global table doesn't have an entry for this TU, add one. */ |
5198 | if (sig_entry == NULL) | |
5199 | sig_entry = add_type_unit (sig, slot); | |
5200 | ||
a2ce51a0 | 5201 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
89e63ee4 | 5202 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
5203 | return sig_entry; |
5204 | } | |
5205 | ||
a2ce51a0 DE |
5206 | /* Subroutine of lookup_signatured_type. |
5207 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
5208 | then try the DWP file. If the TU stub (skeleton) has been removed then |
5209 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
5210 | |
5211 | static struct signatured_type * | |
5212 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5213 | { | |
5214 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5215 | struct dwp_file *dwp_file = get_dwp_file (); | |
5216 | struct dwo_unit *dwo_entry; | |
5217 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5218 | void **slot; |
a2ce51a0 DE |
5219 | |
5220 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
5221 | gdb_assert (dwp_file != NULL); | |
5222 | ||
6aa5f3a6 DE |
5223 | /* If TU skeletons have been removed then we may not have read in any |
5224 | TUs yet. */ | |
5225 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 5226 | { |
6aa5f3a6 DE |
5227 | dwarf2_per_objfile->signatured_types |
5228 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
5229 | } |
5230 | ||
6aa5f3a6 DE |
5231 | find_sig_entry.signature = sig; |
5232 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
5233 | &find_sig_entry, INSERT); | |
9a3c8263 | 5234 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
5235 | |
5236 | /* Have we already tried to read this TU? | |
5237 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
5238 | needn't exist in the global table yet). */ | |
5239 | if (sig_entry != NULL) | |
5240 | return sig_entry; | |
5241 | ||
a2ce51a0 DE |
5242 | if (dwp_file->tus == NULL) |
5243 | return NULL; | |
57d63ce2 DE |
5244 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
5245 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
5246 | if (dwo_entry == NULL) |
5247 | return NULL; | |
5248 | ||
6aa5f3a6 | 5249 | sig_entry = add_type_unit (sig, slot); |
a2ce51a0 DE |
5250 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); |
5251 | ||
a2ce51a0 DE |
5252 | return sig_entry; |
5253 | } | |
5254 | ||
380bca97 | 5255 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
5256 | Returns NULL if signature SIG is not present in the table. |
5257 | It is up to the caller to complain about this. */ | |
348e048f DE |
5258 | |
5259 | static struct signatured_type * | |
a2ce51a0 | 5260 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 5261 | { |
a2ce51a0 DE |
5262 | if (cu->dwo_unit |
5263 | && dwarf2_per_objfile->using_index) | |
5264 | { | |
5265 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
5266 | These cases require special processing. */ | |
5267 | if (get_dwp_file () == NULL) | |
5268 | return lookup_dwo_signatured_type (cu, sig); | |
5269 | else | |
5270 | return lookup_dwp_signatured_type (cu, sig); | |
5271 | } | |
5272 | else | |
5273 | { | |
5274 | struct signatured_type find_entry, *entry; | |
348e048f | 5275 | |
a2ce51a0 DE |
5276 | if (dwarf2_per_objfile->signatured_types == NULL) |
5277 | return NULL; | |
5278 | find_entry.signature = sig; | |
9a3c8263 SM |
5279 | entry = ((struct signatured_type *) |
5280 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
5281 | return entry; |
5282 | } | |
348e048f | 5283 | } |
42e7ad6c DE |
5284 | \f |
5285 | /* Low level DIE reading support. */ | |
348e048f | 5286 | |
d85a05f0 DJ |
5287 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
5288 | ||
5289 | static void | |
5290 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 5291 | struct dwarf2_cu *cu, |
3019eac3 DE |
5292 | struct dwarf2_section_info *section, |
5293 | struct dwo_file *dwo_file) | |
d85a05f0 | 5294 | { |
fceca515 | 5295 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 5296 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 5297 | reader->cu = cu; |
3019eac3 | 5298 | reader->dwo_file = dwo_file; |
dee91e82 DE |
5299 | reader->die_section = section; |
5300 | reader->buffer = section->buffer; | |
f664829e | 5301 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 5302 | reader->comp_dir = NULL; |
d85a05f0 DJ |
5303 | } |
5304 | ||
b0c7bfa9 DE |
5305 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
5306 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
5307 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
5308 | already. | |
5309 | ||
5310 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
5311 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
5312 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
5313 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
5314 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
5315 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
5316 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
5317 | are filled in with the info of the DIE from the DWO file. | |
5318 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
5319 | provided an abbrev table to use. | |
5320 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
5321 | ||
5322 | static int | |
5323 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
5324 | struct dwo_unit *dwo_unit, | |
5325 | int abbrev_table_provided, | |
5326 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 5327 | const char *stub_comp_dir, |
b0c7bfa9 | 5328 | struct die_reader_specs *result_reader, |
d521ce57 | 5329 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
5330 | struct die_info **result_comp_unit_die, |
5331 | int *result_has_children) | |
5332 | { | |
5333 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5334 | struct dwarf2_cu *cu = this_cu->cu; | |
5335 | struct dwarf2_section_info *section; | |
5336 | bfd *abfd; | |
d521ce57 | 5337 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
5338 | ULONGEST signature; /* Or dwo_id. */ |
5339 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
5340 | int i,num_extra_attrs; | |
5341 | struct dwarf2_section_info *dwo_abbrev_section; | |
5342 | struct attribute *attr; | |
5343 | struct die_info *comp_unit_die; | |
5344 | ||
b0aeadb3 DE |
5345 | /* At most one of these may be provided. */ |
5346 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 5347 | |
b0c7bfa9 DE |
5348 | /* These attributes aren't processed until later: |
5349 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
5350 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
5351 | referenced later. However, these attributes are found in the stub | |
5352 | which we won't have later. In order to not impose this complication | |
5353 | on the rest of the code, we read them here and copy them to the | |
5354 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
5355 | |
5356 | stmt_list = NULL; | |
5357 | low_pc = NULL; | |
5358 | high_pc = NULL; | |
5359 | ranges = NULL; | |
5360 | comp_dir = NULL; | |
5361 | ||
5362 | if (stub_comp_unit_die != NULL) | |
5363 | { | |
5364 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
5365 | DWO file. */ | |
5366 | if (! this_cu->is_debug_types) | |
5367 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
5368 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
5369 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
5370 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
5371 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
5372 | ||
5373 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
5374 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
5375 | cu->addr_base = 0; | |
5376 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
5377 | if (attr) | |
5378 | cu->addr_base = DW_UNSND (attr); | |
5379 | ||
5380 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
5381 | We need the value before we can process DW_AT_ranges. */ | |
5382 | cu->ranges_base = 0; | |
5383 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
5384 | if (attr) | |
5385 | cu->ranges_base = DW_UNSND (attr); | |
5386 | } | |
a2ce51a0 DE |
5387 | else if (stub_comp_dir != NULL) |
5388 | { | |
5389 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 5390 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
5391 | comp_dir->name = DW_AT_comp_dir; |
5392 | comp_dir->form = DW_FORM_string; | |
5393 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
5394 | DW_STRING (comp_dir) = stub_comp_dir; | |
5395 | } | |
b0c7bfa9 DE |
5396 | |
5397 | /* Set up for reading the DWO CU/TU. */ | |
5398 | cu->dwo_unit = dwo_unit; | |
5399 | section = dwo_unit->section; | |
5400 | dwarf2_read_section (objfile, section); | |
a32a8923 | 5401 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
5402 | begin_info_ptr = info_ptr = (section->buffer |
5403 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 DE |
5404 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
5405 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
5406 | ||
5407 | if (this_cu->is_debug_types) | |
5408 | { | |
b0c7bfa9 DE |
5409 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
5410 | ||
43988095 | 5411 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
b0c7bfa9 | 5412 | dwo_abbrev_section, |
43988095 | 5413 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 5414 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 5415 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
5416 | { |
5417 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
5418 | " TU at offset 0x%x [in module %s]"), | |
5419 | hex_string (sig_type->signature), | |
43988095 | 5420 | hex_string (cu->header.signature), |
9c541725 | 5421 | to_underlying (dwo_unit->sect_off), |
a2ce51a0 DE |
5422 | bfd_get_filename (abfd)); |
5423 | } | |
9c541725 | 5424 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
5425 | /* For DWOs coming from DWP files, we don't know the CU length |
5426 | nor the type's offset in the TU until now. */ | |
5427 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 5428 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
5429 | |
5430 | /* Establish the type offset that can be used to lookup the type. | |
5431 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
5432 | sig_type->type_offset_in_section |
5433 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
5434 | } |
5435 | else | |
5436 | { | |
5437 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
5438 | dwo_abbrev_section, | |
43988095 | 5439 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 5440 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
5441 | /* For DWOs coming from DWP files, we don't know the CU length |
5442 | until now. */ | |
5443 | dwo_unit->length = get_cu_length (&cu->header); | |
5444 | } | |
5445 | ||
02142a6c DE |
5446 | /* Replace the CU's original abbrev table with the DWO's. |
5447 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
5448 | if (abbrev_table_provided) |
5449 | { | |
5450 | /* Don't free the provided abbrev table, the caller of | |
5451 | init_cutu_and_read_dies owns it. */ | |
5452 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5453 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
5454 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5455 | } | |
5456 | else | |
5457 | { | |
5458 | dwarf2_free_abbrev_table (cu); | |
5459 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 5460 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
5461 | } |
5462 | ||
5463 | /* Read in the die, but leave space to copy over the attributes | |
5464 | from the stub. This has the benefit of simplifying the rest of | |
5465 | the code - all the work to maintain the illusion of a single | |
5466 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
5467 | num_extra_attrs = ((stmt_list != NULL) | |
5468 | + (low_pc != NULL) | |
5469 | + (high_pc != NULL) | |
5470 | + (ranges != NULL) | |
5471 | + (comp_dir != NULL)); | |
5472 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
5473 | result_has_children, num_extra_attrs); | |
5474 | ||
5475 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
5476 | comp_unit_die = *result_comp_unit_die; | |
5477 | i = comp_unit_die->num_attrs; | |
5478 | if (stmt_list != NULL) | |
5479 | comp_unit_die->attrs[i++] = *stmt_list; | |
5480 | if (low_pc != NULL) | |
5481 | comp_unit_die->attrs[i++] = *low_pc; | |
5482 | if (high_pc != NULL) | |
5483 | comp_unit_die->attrs[i++] = *high_pc; | |
5484 | if (ranges != NULL) | |
5485 | comp_unit_die->attrs[i++] = *ranges; | |
5486 | if (comp_dir != NULL) | |
5487 | comp_unit_die->attrs[i++] = *comp_dir; | |
5488 | comp_unit_die->num_attrs += num_extra_attrs; | |
5489 | ||
b4f54984 | 5490 | if (dwarf_die_debug) |
bf6af496 DE |
5491 | { |
5492 | fprintf_unfiltered (gdb_stdlog, | |
5493 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 5494 | get_section_name (section), |
bf6af496 DE |
5495 | (unsigned) (begin_info_ptr - section->buffer), |
5496 | bfd_get_filename (abfd)); | |
b4f54984 | 5497 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
5498 | } |
5499 | ||
a2ce51a0 DE |
5500 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
5501 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
5502 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
5503 | to get it via circuitous means. Blech. */ | |
5504 | if (comp_dir != NULL) | |
5505 | result_reader->comp_dir = DW_STRING (comp_dir); | |
5506 | ||
b0c7bfa9 DE |
5507 | /* Skip dummy compilation units. */ |
5508 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
5509 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
5510 | return 0; | |
5511 | ||
5512 | *result_info_ptr = info_ptr; | |
5513 | return 1; | |
5514 | } | |
5515 | ||
5516 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
5517 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 5518 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
5519 | |
5520 | static struct dwo_unit * | |
5521 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
5522 | struct die_info *comp_unit_die) | |
5523 | { | |
5524 | struct dwarf2_cu *cu = this_cu->cu; | |
5525 | struct attribute *attr; | |
5526 | ULONGEST signature; | |
5527 | struct dwo_unit *dwo_unit; | |
5528 | const char *comp_dir, *dwo_name; | |
5529 | ||
a2ce51a0 DE |
5530 | gdb_assert (cu != NULL); |
5531 | ||
b0c7bfa9 | 5532 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
7d45c7c3 KB |
5533 | dwo_name = dwarf2_string_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5534 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
b0c7bfa9 DE |
5535 | |
5536 | if (this_cu->is_debug_types) | |
5537 | { | |
5538 | struct signatured_type *sig_type; | |
5539 | ||
5540 | /* Since this_cu is the first member of struct signatured_type, | |
5541 | we can go from a pointer to one to a pointer to the other. */ | |
5542 | sig_type = (struct signatured_type *) this_cu; | |
5543 | signature = sig_type->signature; | |
5544 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
5545 | } | |
5546 | else | |
5547 | { | |
5548 | struct attribute *attr; | |
5549 | ||
5550 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
5551 | if (! attr) | |
5552 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
5553 | " [in module %s]"), | |
4262abfb | 5554 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
5555 | signature = DW_UNSND (attr); |
5556 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
5557 | signature); | |
5558 | } | |
5559 | ||
b0c7bfa9 DE |
5560 | return dwo_unit; |
5561 | } | |
5562 | ||
a2ce51a0 | 5563 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 DE |
5564 | See it for a description of the parameters. |
5565 | Read a TU directly from a DWO file, bypassing the stub. | |
5566 | ||
5567 | Note: This function could be a little bit simpler if we shared cleanups | |
5568 | with our caller, init_cutu_and_read_dies. That's generally a fragile thing | |
5569 | to do, so we keep this function self-contained. Or we could move this | |
5570 | into our caller, but it's complex enough already. */ | |
a2ce51a0 DE |
5571 | |
5572 | static void | |
6aa5f3a6 DE |
5573 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
5574 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
5575 | die_reader_func_ftype *die_reader_func, |
5576 | void *data) | |
5577 | { | |
5578 | struct dwarf2_cu *cu; | |
5579 | struct signatured_type *sig_type; | |
6aa5f3a6 | 5580 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
a2ce51a0 DE |
5581 | struct die_reader_specs reader; |
5582 | const gdb_byte *info_ptr; | |
5583 | struct die_info *comp_unit_die; | |
5584 | int has_children; | |
5585 | ||
5586 | /* Verify we can do the following downcast, and that we have the | |
5587 | data we need. */ | |
5588 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
5589 | sig_type = (struct signatured_type *) this_cu; | |
5590 | gdb_assert (sig_type->dwo_unit != NULL); | |
5591 | ||
5592 | cleanups = make_cleanup (null_cleanup, NULL); | |
5593 | ||
6aa5f3a6 DE |
5594 | if (use_existing_cu && this_cu->cu != NULL) |
5595 | { | |
5596 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
5597 | cu = this_cu->cu; | |
5598 | /* There's no need to do the rereading_dwo_cu handling that | |
5599 | init_cutu_and_read_dies does since we don't read the stub. */ | |
5600 | } | |
5601 | else | |
5602 | { | |
5603 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5604 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5605 | cu = XNEW (struct dwarf2_cu); |
6aa5f3a6 DE |
5606 | init_one_comp_unit (cu, this_cu); |
5607 | /* If an error occurs while loading, release our storage. */ | |
5608 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
5609 | } | |
5610 | ||
5611 | /* A future optimization, if needed, would be to use an existing | |
5612 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
5613 | could share abbrev tables. */ | |
a2ce51a0 DE |
5614 | |
5615 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
5616 | 0 /* abbrev_table_provided */, | |
5617 | NULL /* stub_comp_unit_die */, | |
5618 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5619 | &reader, &info_ptr, | |
5620 | &comp_unit_die, &has_children) == 0) | |
5621 | { | |
5622 | /* Dummy die. */ | |
5623 | do_cleanups (cleanups); | |
5624 | return; | |
5625 | } | |
5626 | ||
5627 | /* All the "real" work is done here. */ | |
5628 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5629 | ||
6aa5f3a6 | 5630 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
5631 | but the alternative is making the latter more complex. |
5632 | This function is only for the special case of using DWO files directly: | |
5633 | no point in overly complicating the general case just to handle this. */ | |
6aa5f3a6 | 5634 | if (free_cu_cleanup != NULL) |
a2ce51a0 | 5635 | { |
6aa5f3a6 DE |
5636 | if (keep) |
5637 | { | |
5638 | /* We've successfully allocated this compilation unit. Let our | |
5639 | caller clean it up when finished with it. */ | |
5640 | discard_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5641 | |
6aa5f3a6 DE |
5642 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5643 | So we have to manually free the abbrev table. */ | |
5644 | dwarf2_free_abbrev_table (cu); | |
a2ce51a0 | 5645 | |
6aa5f3a6 DE |
5646 | /* Link this CU into read_in_chain. */ |
5647 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5648 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5649 | } | |
5650 | else | |
5651 | do_cleanups (free_cu_cleanup); | |
a2ce51a0 | 5652 | } |
a2ce51a0 DE |
5653 | |
5654 | do_cleanups (cleanups); | |
5655 | } | |
5656 | ||
fd820528 | 5657 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5658 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5659 | |
f4dc4d17 DE |
5660 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5661 | Otherwise the table specified in the comp unit header is read in and used. | |
5662 | This is an optimization for when we already have the abbrev table. | |
5663 | ||
dee91e82 DE |
5664 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5665 | Otherwise, a new CU is allocated with xmalloc. | |
5666 | ||
5667 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5668 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5669 | ||
5670 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5671 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5672 | |
70221824 | 5673 | static void |
fd820528 | 5674 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5675 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5676 | int use_existing_cu, int keep, |
5677 | die_reader_func_ftype *die_reader_func, | |
5678 | void *data) | |
c906108c | 5679 | { |
dee91e82 | 5680 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5681 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5682 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5683 | struct dwarf2_cu *cu; |
d521ce57 | 5684 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5685 | struct die_reader_specs reader; |
d85a05f0 | 5686 | struct die_info *comp_unit_die; |
dee91e82 | 5687 | int has_children; |
d85a05f0 | 5688 | struct attribute *attr; |
365156ad | 5689 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5690 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5691 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5692 | /* Non-zero if CU currently points to a DWO file and we need to |
5693 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5694 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5695 | int rereading_dwo_cu = 0; |
c906108c | 5696 | |
b4f54984 | 5697 | if (dwarf_die_debug) |
09406207 DE |
5698 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5699 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 5700 | to_underlying (this_cu->sect_off)); |
09406207 | 5701 | |
dee91e82 DE |
5702 | if (use_existing_cu) |
5703 | gdb_assert (keep); | |
23745b47 | 5704 | |
a2ce51a0 DE |
5705 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5706 | file (instead of going through the stub), short-circuit all of this. */ | |
5707 | if (this_cu->reading_dwo_directly) | |
5708 | { | |
5709 | /* Narrow down the scope of possibilities to have to understand. */ | |
5710 | gdb_assert (this_cu->is_debug_types); | |
5711 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
5712 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
5713 | die_reader_func, data); | |
a2ce51a0 DE |
5714 | return; |
5715 | } | |
5716 | ||
dee91e82 DE |
5717 | cleanups = make_cleanup (null_cleanup, NULL); |
5718 | ||
5719 | /* This is cheap if the section is already read in. */ | |
5720 | dwarf2_read_section (objfile, section); | |
5721 | ||
9c541725 | 5722 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
5723 | |
5724 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5725 | |
5726 | if (use_existing_cu && this_cu->cu != NULL) | |
5727 | { | |
5728 | cu = this_cu->cu; | |
42e7ad6c DE |
5729 | /* If this CU is from a DWO file we need to start over, we need to |
5730 | refetch the attributes from the skeleton CU. | |
5731 | This could be optimized by retrieving those attributes from when we | |
5732 | were here the first time: the previous comp_unit_die was stored in | |
5733 | comp_unit_obstack. But there's no data yet that we need this | |
5734 | optimization. */ | |
5735 | if (cu->dwo_unit != NULL) | |
5736 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5737 | } |
5738 | else | |
5739 | { | |
5740 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5741 | gdb_assert (this_cu->cu == NULL); | |
8d749320 | 5742 | cu = XNEW (struct dwarf2_cu); |
dee91e82 | 5743 | init_one_comp_unit (cu, this_cu); |
dee91e82 | 5744 | /* If an error occurs while loading, release our storage. */ |
365156ad | 5745 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5746 | } |
dee91e82 | 5747 | |
b0c7bfa9 | 5748 | /* Get the header. */ |
9c541725 | 5749 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
5750 | { |
5751 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 5752 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
5753 | } |
5754 | else | |
5755 | { | |
3019eac3 | 5756 | if (this_cu->is_debug_types) |
dee91e82 | 5757 | { |
43988095 | 5758 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4bdcc0c1 | 5759 | abbrev_section, info_ptr, |
43988095 | 5760 | rcuh_kind::TYPE); |
dee91e82 | 5761 | |
42e7ad6c DE |
5762 | /* Since per_cu is the first member of struct signatured_type, |
5763 | we can go from a pointer to one to a pointer to the other. */ | |
5764 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 5765 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
5766 | gdb_assert (sig_type->type_offset_in_tu |
5767 | == cu->header.type_cu_offset_in_tu); | |
5768 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 5769 | |
42e7ad6c DE |
5770 | /* LENGTH has not been set yet for type units if we're |
5771 | using .gdb_index. */ | |
1ce1cefd | 5772 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5773 | |
5774 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
5775 | sig_type->type_offset_in_section = |
5776 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
5777 | |
5778 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
5779 | } |
5780 | else | |
5781 | { | |
4bdcc0c1 DE |
5782 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5783 | abbrev_section, | |
43988095 JK |
5784 | info_ptr, |
5785 | rcuh_kind::COMPILE); | |
dee91e82 | 5786 | |
9c541725 | 5787 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 5788 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 5789 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
5790 | } |
5791 | } | |
10b3939b | 5792 | |
6caca83c | 5793 | /* Skip dummy compilation units. */ |
dee91e82 | 5794 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5795 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5796 | { | |
dee91e82 | 5797 | do_cleanups (cleanups); |
21b2bd31 | 5798 | return; |
6caca83c CC |
5799 | } |
5800 | ||
433df2d4 DE |
5801 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5802 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5803 | done. Note that it's important that if the CU had an abbrev table |
5804 | on entry we don't free it when we're done: Somewhere up the call stack | |
5805 | it may be in use. */ | |
f4dc4d17 DE |
5806 | if (abbrev_table != NULL) |
5807 | { | |
5808 | gdb_assert (cu->abbrev_table == NULL); | |
9c541725 | 5809 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
f4dc4d17 DE |
5810 | cu->abbrev_table = abbrev_table; |
5811 | } | |
5812 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5813 | { |
4bdcc0c1 | 5814 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5815 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5816 | } | |
42e7ad6c DE |
5817 | else if (rereading_dwo_cu) |
5818 | { | |
5819 | dwarf2_free_abbrev_table (cu); | |
5820 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5821 | } | |
af703f96 | 5822 | |
dee91e82 | 5823 | /* Read the top level CU/TU die. */ |
3019eac3 | 5824 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5825 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5826 | |
b0c7bfa9 DE |
5827 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5828 | from the DWO file. | |
5829 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5830 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5831 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5832 | if (attr) | |
5833 | { | |
3019eac3 | 5834 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5835 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5836 | |
5837 | if (has_children) | |
6a506a2d DE |
5838 | { |
5839 | complaint (&symfile_complaints, | |
5840 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5841 | " has children (offset 0x%x) [in module %s]"), | |
9c541725 | 5842 | to_underlying (this_cu->sect_off), bfd_get_filename (abfd)); |
6a506a2d | 5843 | } |
b0c7bfa9 | 5844 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5845 | if (dwo_unit != NULL) |
3019eac3 | 5846 | { |
6a506a2d DE |
5847 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5848 | abbrev_table != NULL, | |
a2ce51a0 | 5849 | comp_unit_die, NULL, |
6a506a2d DE |
5850 | &reader, &info_ptr, |
5851 | &dwo_comp_unit_die, &has_children) == 0) | |
5852 | { | |
5853 | /* Dummy die. */ | |
5854 | do_cleanups (cleanups); | |
5855 | return; | |
5856 | } | |
5857 | comp_unit_die = dwo_comp_unit_die; | |
5858 | } | |
5859 | else | |
5860 | { | |
5861 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5862 | the stub. A complaint has already been logged. There's | |
5863 | not much more we can do except pass on the stub DIE to | |
5864 | die_reader_func. We don't want to throw an error on bad | |
5865 | debug info. */ | |
3019eac3 DE |
5866 | } |
5867 | } | |
5868 | ||
b0c7bfa9 | 5869 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5870 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5871 | ||
b0c7bfa9 | 5872 | /* Done, clean up. */ |
365156ad | 5873 | if (free_cu_cleanup != NULL) |
348e048f | 5874 | { |
365156ad TT |
5875 | if (keep) |
5876 | { | |
5877 | /* We've successfully allocated this compilation unit. Let our | |
5878 | caller clean it up when finished with it. */ | |
5879 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5880 | |
365156ad TT |
5881 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5882 | So we have to manually free the abbrev table. */ | |
5883 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5884 | |
365156ad TT |
5885 | /* Link this CU into read_in_chain. */ |
5886 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5887 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5888 | } | |
5889 | else | |
5890 | do_cleanups (free_cu_cleanup); | |
348e048f | 5891 | } |
365156ad TT |
5892 | |
5893 | do_cleanups (cleanups); | |
dee91e82 DE |
5894 | } |
5895 | ||
33e80786 DE |
5896 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
5897 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
5898 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
5899 | |
5900 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5901 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5902 | |
5903 | We fill in THIS_CU->length. | |
5904 | ||
5905 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5906 | linker) then DIE_READER_FUNC will not get called. | |
5907 | ||
5908 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5909 | This is done in order to not leave THIS_CU->cu in a state where we have |
5910 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5911 | |
5912 | static void | |
5913 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 5914 | struct dwo_file *dwo_file, |
dee91e82 DE |
5915 | die_reader_func_ftype *die_reader_func, |
5916 | void *data) | |
5917 | { | |
5918 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5919 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5920 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 5921 | struct dwarf2_section_info *abbrev_section; |
dee91e82 | 5922 | struct dwarf2_cu cu; |
d521ce57 | 5923 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5924 | struct die_reader_specs reader; |
5925 | struct cleanup *cleanups; | |
5926 | struct die_info *comp_unit_die; | |
5927 | int has_children; | |
5928 | ||
b4f54984 | 5929 | if (dwarf_die_debug) |
09406207 DE |
5930 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", |
5931 | this_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 5932 | to_underlying (this_cu->sect_off)); |
09406207 | 5933 | |
dee91e82 DE |
5934 | gdb_assert (this_cu->cu == NULL); |
5935 | ||
33e80786 DE |
5936 | abbrev_section = (dwo_file != NULL |
5937 | ? &dwo_file->sections.abbrev | |
5938 | : get_abbrev_section_for_cu (this_cu)); | |
5939 | ||
dee91e82 DE |
5940 | /* This is cheap if the section is already read in. */ |
5941 | dwarf2_read_section (objfile, section); | |
5942 | ||
5943 | init_one_comp_unit (&cu, this_cu); | |
5944 | ||
5945 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5946 | ||
9c541725 | 5947 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
4bdcc0c1 DE |
5948 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5949 | abbrev_section, info_ptr, | |
43988095 JK |
5950 | (this_cu->is_debug_types |
5951 | ? rcuh_kind::TYPE | |
5952 | : rcuh_kind::COMPILE)); | |
dee91e82 | 5953 | |
1ce1cefd | 5954 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5955 | |
5956 | /* Skip dummy compilation units. */ | |
5957 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5958 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5959 | { |
dee91e82 | 5960 | do_cleanups (cleanups); |
21b2bd31 | 5961 | return; |
93311388 | 5962 | } |
72bf9492 | 5963 | |
dee91e82 DE |
5964 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5965 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5966 | ||
3019eac3 | 5967 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5968 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5969 | ||
5970 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5971 | ||
5972 | do_cleanups (cleanups); | |
5973 | } | |
5974 | ||
3019eac3 DE |
5975 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5976 | does not lookup the specified DWO file. | |
5977 | This cannot be used to read DWO files. | |
dee91e82 DE |
5978 | |
5979 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5980 | This is done in order to not leave THIS_CU->cu in a state where we have |
5981 | to care whether it refers to the "main" CU or the DWO CU. | |
5982 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5983 | |
5984 | static void | |
5985 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5986 | die_reader_func_ftype *die_reader_func, | |
5987 | void *data) | |
5988 | { | |
33e80786 | 5989 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 5990 | } |
0018ea6f DE |
5991 | \f |
5992 | /* Type Unit Groups. | |
dee91e82 | 5993 | |
0018ea6f DE |
5994 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5995 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5996 | so that all types coming from the same compilation (.o file) are grouped | |
5997 | together. A future step could be to put the types in the same symtab as | |
5998 | the CU the types ultimately came from. */ | |
ff013f42 | 5999 | |
f4dc4d17 DE |
6000 | static hashval_t |
6001 | hash_type_unit_group (const void *item) | |
6002 | { | |
9a3c8263 SM |
6003 | const struct type_unit_group *tu_group |
6004 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6005 | |
094b34ac | 6006 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6007 | } |
348e048f DE |
6008 | |
6009 | static int | |
f4dc4d17 | 6010 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6011 | { |
9a3c8263 SM |
6012 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6013 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6014 | |
094b34ac | 6015 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6016 | } |
348e048f | 6017 | |
f4dc4d17 DE |
6018 | /* Allocate a hash table for type unit groups. */ |
6019 | ||
6020 | static htab_t | |
6021 | allocate_type_unit_groups_table (void) | |
6022 | { | |
6023 | return htab_create_alloc_ex (3, | |
6024 | hash_type_unit_group, | |
6025 | eq_type_unit_group, | |
6026 | NULL, | |
6027 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
6028 | hashtab_obstack_allocate, | |
6029 | dummy_obstack_deallocate); | |
6030 | } | |
dee91e82 | 6031 | |
f4dc4d17 DE |
6032 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6033 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6034 | of any one psymtab grow too big. */ | |
6035 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6036 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6037 | |
094b34ac | 6038 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6039 | Create the type_unit_group object used to hold one or more TUs. */ |
6040 | ||
6041 | static struct type_unit_group * | |
094b34ac | 6042 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
6043 | { |
6044 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 6045 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 6046 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
6047 | |
6048 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6049 | struct type_unit_group); | |
094b34ac | 6050 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 6051 | per_cu->objfile = objfile; |
f4dc4d17 | 6052 | |
094b34ac DE |
6053 | if (dwarf2_per_objfile->using_index) |
6054 | { | |
6055 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6056 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6057 | } |
6058 | else | |
6059 | { | |
9c541725 | 6060 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac DE |
6061 | struct partial_symtab *pst; |
6062 | char *name; | |
6063 | ||
6064 | /* Give the symtab a useful name for debug purposes. */ | |
6065 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
6066 | name = xstrprintf ("<type_units_%d>", | |
6067 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
6068 | else | |
6069 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
6070 | ||
6071 | pst = create_partial_symtab (per_cu, name); | |
6072 | pst->anonymous = 1; | |
f4dc4d17 | 6073 | |
094b34ac DE |
6074 | xfree (name); |
6075 | } | |
f4dc4d17 | 6076 | |
094b34ac | 6077 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6078 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6079 | |
6080 | return tu_group; | |
6081 | } | |
6082 | ||
094b34ac DE |
6083 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6084 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6085 | |
6086 | static struct type_unit_group * | |
ff39bb5e | 6087 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
6088 | { |
6089 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6090 | struct type_unit_group *tu_group; | |
6091 | void **slot; | |
6092 | unsigned int line_offset; | |
6093 | struct type_unit_group type_unit_group_for_lookup; | |
6094 | ||
6095 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
6096 | { | |
6097 | dwarf2_per_objfile->type_unit_groups = | |
6098 | allocate_type_unit_groups_table (); | |
6099 | } | |
6100 | ||
6101 | /* Do we need to create a new group, or can we use an existing one? */ | |
6102 | ||
6103 | if (stmt_list) | |
6104 | { | |
6105 | line_offset = DW_UNSND (stmt_list); | |
6106 | ++tu_stats->nr_symtab_sharers; | |
6107 | } | |
6108 | else | |
6109 | { | |
6110 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6111 | We can do various things here like create one group per TU or | |
6112 | spread them over multiple groups to split up the expansion work. | |
6113 | To avoid worst case scenarios (too many groups or too large groups) | |
6114 | we, umm, group them in bunches. */ | |
6115 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6116 | | (tu_stats->nr_stmt_less_type_units | |
6117 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6118 | ++tu_stats->nr_stmt_less_type_units; | |
6119 | } | |
6120 | ||
094b34ac | 6121 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6122 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
6123 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
6124 | &type_unit_group_for_lookup, INSERT); | |
6125 | if (*slot != NULL) | |
6126 | { | |
9a3c8263 | 6127 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
6128 | gdb_assert (tu_group != NULL); |
6129 | } | |
6130 | else | |
6131 | { | |
9c541725 | 6132 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 6133 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
6134 | *slot = tu_group; |
6135 | ++tu_stats->nr_symtabs; | |
6136 | } | |
6137 | ||
6138 | return tu_group; | |
6139 | } | |
0018ea6f DE |
6140 | \f |
6141 | /* Partial symbol tables. */ | |
6142 | ||
6143 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6144 | ||
6145 | The caller must fill in the following details: | |
6146 | dirname, textlow, texthigh. */ | |
6147 | ||
6148 | static struct partial_symtab * | |
6149 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
6150 | { | |
6151 | struct objfile *objfile = per_cu->objfile; | |
6152 | struct partial_symtab *pst; | |
6153 | ||
18a94d75 | 6154 | pst = start_psymtab_common (objfile, name, 0, |
0018ea6f DE |
6155 | objfile->global_psymbols.next, |
6156 | objfile->static_psymbols.next); | |
6157 | ||
6158 | pst->psymtabs_addrmap_supported = 1; | |
6159 | ||
6160 | /* This is the glue that links PST into GDB's symbol API. */ | |
6161 | pst->read_symtab_private = per_cu; | |
6162 | pst->read_symtab = dwarf2_read_symtab; | |
6163 | per_cu->v.psymtab = pst; | |
6164 | ||
6165 | return pst; | |
6166 | } | |
6167 | ||
b93601f3 TT |
6168 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
6169 | type. */ | |
6170 | ||
6171 | struct process_psymtab_comp_unit_data | |
6172 | { | |
6173 | /* True if we are reading a DW_TAG_partial_unit. */ | |
6174 | ||
6175 | int want_partial_unit; | |
6176 | ||
6177 | /* The "pretend" language that is used if the CU doesn't declare a | |
6178 | language. */ | |
6179 | ||
6180 | enum language pretend_language; | |
6181 | }; | |
6182 | ||
0018ea6f DE |
6183 | /* die_reader_func for process_psymtab_comp_unit. */ |
6184 | ||
6185 | static void | |
6186 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6187 | const gdb_byte *info_ptr, |
0018ea6f DE |
6188 | struct die_info *comp_unit_die, |
6189 | int has_children, | |
6190 | void *data) | |
6191 | { | |
6192 | struct dwarf2_cu *cu = reader->cu; | |
6193 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 6194 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 6195 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
6196 | CORE_ADDR baseaddr; |
6197 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
6198 | struct partial_symtab *pst; | |
3a2b436a | 6199 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 6200 | const char *filename; |
9a3c8263 SM |
6201 | struct process_psymtab_comp_unit_data *info |
6202 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 6203 | |
b93601f3 | 6204 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
6205 | return; |
6206 | ||
6207 | gdb_assert (! per_cu->is_debug_types); | |
6208 | ||
b93601f3 | 6209 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
6210 | |
6211 | cu->list_in_scope = &file_symbols; | |
6212 | ||
6213 | /* Allocate a new partial symbol table structure. */ | |
7d45c7c3 KB |
6214 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
6215 | if (filename == NULL) | |
0018ea6f | 6216 | filename = ""; |
0018ea6f DE |
6217 | |
6218 | pst = create_partial_symtab (per_cu, filename); | |
6219 | ||
6220 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 6221 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f DE |
6222 | |
6223 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6224 | ||
6225 | dwarf2_find_base_address (comp_unit_die, cu); | |
6226 | ||
6227 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6228 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6229 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6230 | &best_highpc, cu, pst); | |
6231 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
0018ea6f DE |
6232 | /* Store the contiguous range if it is not empty; it can be empty for |
6233 | CUs with no code. */ | |
6234 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
3e29f34a MR |
6235 | gdbarch_adjust_dwarf2_addr (gdbarch, |
6236 | best_lowpc + baseaddr), | |
6237 | gdbarch_adjust_dwarf2_addr (gdbarch, | |
6238 | best_highpc + baseaddr) - 1, | |
6239 | pst); | |
0018ea6f DE |
6240 | |
6241 | /* Check if comp unit has_children. | |
6242 | If so, read the rest of the partial symbols from this comp unit. | |
6243 | If not, there's no more debug_info for this comp unit. */ | |
6244 | if (has_children) | |
6245 | { | |
6246 | struct partial_die_info *first_die; | |
6247 | CORE_ADDR lowpc, highpc; | |
6248 | ||
6249 | lowpc = ((CORE_ADDR) -1); | |
6250 | highpc = ((CORE_ADDR) 0); | |
6251 | ||
6252 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6253 | ||
6254 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6255 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6256 | |
6257 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6258 | complaints from `maint check'. */ | |
6259 | if (lowpc == ((CORE_ADDR) -1)) | |
6260 | lowpc = highpc; | |
6261 | ||
6262 | /* If the compilation unit didn't have an explicit address range, | |
6263 | then use the information extracted from its child dies. */ | |
e385593e | 6264 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6265 | { |
6266 | best_lowpc = lowpc; | |
6267 | best_highpc = highpc; | |
6268 | } | |
6269 | } | |
3e29f34a MR |
6270 | pst->textlow = gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr); |
6271 | pst->texthigh = gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr); | |
0018ea6f | 6272 | |
8763cede | 6273 | end_psymtab_common (objfile, pst); |
0018ea6f DE |
6274 | |
6275 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
6276 | { | |
6277 | int i; | |
6278 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6279 | struct dwarf2_per_cu_data *iter; | |
6280 | ||
6281 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6282 | post-pass. */ | |
6283 | pst->number_of_dependencies = len; | |
8d749320 SM |
6284 | pst->dependencies = |
6285 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
0018ea6f DE |
6286 | for (i = 0; |
6287 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
6288 | i, iter); | |
6289 | ++i) | |
6290 | pst->dependencies[i] = iter->v.psymtab; | |
6291 | ||
6292 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
6293 | } | |
6294 | ||
6295 | /* Get the list of files included in the current compilation unit, | |
6296 | and build a psymtab for each of them. */ | |
6297 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
6298 | ||
b4f54984 | 6299 | if (dwarf_read_debug) |
0018ea6f DE |
6300 | { |
6301 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6302 | ||
6303 | fprintf_unfiltered (gdb_stdlog, | |
6304 | "Psymtab for %s unit @0x%x: %s - %s" | |
6305 | ", %d global, %d static syms\n", | |
6306 | per_cu->is_debug_types ? "type" : "comp", | |
9c541725 | 6307 | to_underlying (per_cu->sect_off), |
0018ea6f DE |
6308 | paddress (gdbarch, pst->textlow), |
6309 | paddress (gdbarch, pst->texthigh), | |
6310 | pst->n_global_syms, pst->n_static_syms); | |
6311 | } | |
6312 | } | |
6313 | ||
6314 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6315 | Process compilation unit THIS_CU for a psymtab. */ | |
6316 | ||
6317 | static void | |
6318 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
6319 | int want_partial_unit, |
6320 | enum language pretend_language) | |
0018ea6f DE |
6321 | { |
6322 | /* If this compilation unit was already read in, free the | |
6323 | cached copy in order to read it in again. This is | |
6324 | necessary because we skipped some symbols when we first | |
6325 | read in the compilation unit (see load_partial_dies). | |
6326 | This problem could be avoided, but the benefit is unclear. */ | |
6327 | if (this_cu->cu != NULL) | |
6328 | free_one_cached_comp_unit (this_cu); | |
6329 | ||
f1902523 JK |
6330 | if (this_cu->is_debug_types) |
6331 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, build_type_psymtabs_reader, | |
6332 | NULL); | |
6333 | else | |
6334 | { | |
6335 | process_psymtab_comp_unit_data info; | |
6336 | info.want_partial_unit = want_partial_unit; | |
6337 | info.pretend_language = pretend_language; | |
6338 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
6339 | process_psymtab_comp_unit_reader, &info); | |
6340 | } | |
0018ea6f DE |
6341 | |
6342 | /* Age out any secondary CUs. */ | |
6343 | age_cached_comp_units (); | |
6344 | } | |
f4dc4d17 DE |
6345 | |
6346 | /* Reader function for build_type_psymtabs. */ | |
6347 | ||
6348 | static void | |
6349 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6350 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
6351 | struct die_info *type_unit_die, |
6352 | int has_children, | |
6353 | void *data) | |
6354 | { | |
6355 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6356 | struct dwarf2_cu *cu = reader->cu; | |
6357 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 6358 | struct signatured_type *sig_type; |
f4dc4d17 DE |
6359 | struct type_unit_group *tu_group; |
6360 | struct attribute *attr; | |
6361 | struct partial_die_info *first_die; | |
6362 | CORE_ADDR lowpc, highpc; | |
6363 | struct partial_symtab *pst; | |
6364 | ||
6365 | gdb_assert (data == NULL); | |
0186c6a7 DE |
6366 | gdb_assert (per_cu->is_debug_types); |
6367 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
6368 | |
6369 | if (! has_children) | |
6370 | return; | |
6371 | ||
6372 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 6373 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 6374 | |
0186c6a7 | 6375 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
6376 | |
6377 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
6378 | cu->list_in_scope = &file_symbols; | |
6379 | pst = create_partial_symtab (per_cu, ""); | |
6380 | pst->anonymous = 1; | |
6381 | ||
6382 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6383 | ||
6384 | lowpc = (CORE_ADDR) -1; | |
6385 | highpc = (CORE_ADDR) 0; | |
6386 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
6387 | ||
8763cede | 6388 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
6389 | } |
6390 | ||
73051182 DE |
6391 | /* Struct used to sort TUs by their abbreviation table offset. */ |
6392 | ||
6393 | struct tu_abbrev_offset | |
6394 | { | |
6395 | struct signatured_type *sig_type; | |
6396 | sect_offset abbrev_offset; | |
6397 | }; | |
6398 | ||
6399 | /* Helper routine for build_type_psymtabs_1, passed to qsort. */ | |
6400 | ||
6401 | static int | |
6402 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
6403 | { | |
9a3c8263 SM |
6404 | const struct tu_abbrev_offset * const *a |
6405 | = (const struct tu_abbrev_offset * const*) ap; | |
6406 | const struct tu_abbrev_offset * const *b | |
6407 | = (const struct tu_abbrev_offset * const*) bp; | |
9c541725 PA |
6408 | sect_offset aoff = (*a)->abbrev_offset; |
6409 | sect_offset boff = (*b)->abbrev_offset; | |
73051182 DE |
6410 | |
6411 | return (aoff > boff) - (aoff < boff); | |
6412 | } | |
6413 | ||
6414 | /* Efficiently read all the type units. | |
6415 | This does the bulk of the work for build_type_psymtabs. | |
6416 | ||
6417 | The efficiency is because we sort TUs by the abbrev table they use and | |
6418 | only read each abbrev table once. In one program there are 200K TUs | |
6419 | sharing 8K abbrev tables. | |
6420 | ||
6421 | The main purpose of this function is to support building the | |
6422 | dwarf2_per_objfile->type_unit_groups table. | |
6423 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
6424 | can collapse the search space by grouping them by stmt_list. | |
6425 | The savings can be significant, in the same program from above the 200K TUs | |
6426 | share 8K stmt_list tables. | |
6427 | ||
6428 | FUNC is expected to call get_type_unit_group, which will create the | |
6429 | struct type_unit_group if necessary and add it to | |
6430 | dwarf2_per_objfile->type_unit_groups. */ | |
6431 | ||
6432 | static void | |
6433 | build_type_psymtabs_1 (void) | |
6434 | { | |
73051182 DE |
6435 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
6436 | struct cleanup *cleanups; | |
6437 | struct abbrev_table *abbrev_table; | |
6438 | sect_offset abbrev_offset; | |
6439 | struct tu_abbrev_offset *sorted_by_abbrev; | |
73051182 DE |
6440 | int i; |
6441 | ||
6442 | /* It's up to the caller to not call us multiple times. */ | |
6443 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
6444 | ||
6445 | if (dwarf2_per_objfile->n_type_units == 0) | |
6446 | return; | |
6447 | ||
6448 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
6449 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
6450 | read each abbrev table in. | |
6451 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
6452 | This is simpler and efficient enough for now. | |
6453 | ||
6454 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
6455 | symtab to use). Typically TUs with the same abbrev offset have the same | |
6456 | stmt_list value too so in practice this should work well. | |
6457 | ||
6458 | The basic algorithm here is: | |
6459 | ||
6460 | sort TUs by abbrev table | |
6461 | for each TU with same abbrev table: | |
6462 | read abbrev table if first user | |
6463 | read TU top level DIE | |
6464 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
6465 | call FUNC */ | |
6466 | ||
b4f54984 | 6467 | if (dwarf_read_debug) |
73051182 DE |
6468 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
6469 | ||
6470 | /* Sort in a separate table to maintain the order of all_type_units | |
6471 | for .gdb_index: TU indices directly index all_type_units. */ | |
6472 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
6473 | dwarf2_per_objfile->n_type_units); | |
6474 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6475 | { | |
6476 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
6477 | ||
6478 | sorted_by_abbrev[i].sig_type = sig_type; | |
6479 | sorted_by_abbrev[i].abbrev_offset = | |
6480 | read_abbrev_offset (sig_type->per_cu.section, | |
9c541725 | 6481 | sig_type->per_cu.sect_off); |
73051182 DE |
6482 | } |
6483 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
6484 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
6485 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
6486 | ||
9c541725 | 6487 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 DE |
6488 | abbrev_table = NULL; |
6489 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
6490 | ||
6491 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
6492 | { | |
6493 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
6494 | ||
6495 | /* Switch to the next abbrev table if necessary. */ | |
6496 | if (abbrev_table == NULL | |
9c541725 | 6497 | || tu->abbrev_offset != abbrev_offset) |
73051182 DE |
6498 | { |
6499 | if (abbrev_table != NULL) | |
6500 | { | |
6501 | abbrev_table_free (abbrev_table); | |
6502 | /* Reset to NULL in case abbrev_table_read_table throws | |
6503 | an error: abbrev_table_free_cleanup will get called. */ | |
6504 | abbrev_table = NULL; | |
6505 | } | |
6506 | abbrev_offset = tu->abbrev_offset; | |
6507 | abbrev_table = | |
6508 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
6509 | abbrev_offset); | |
6510 | ++tu_stats->nr_uniq_abbrev_tables; | |
6511 | } | |
6512 | ||
6513 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
6514 | build_type_psymtabs_reader, NULL); | |
6515 | } | |
6516 | ||
73051182 | 6517 | do_cleanups (cleanups); |
6aa5f3a6 | 6518 | } |
73051182 | 6519 | |
6aa5f3a6 DE |
6520 | /* Print collected type unit statistics. */ |
6521 | ||
6522 | static void | |
6523 | print_tu_stats (void) | |
6524 | { | |
6525 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
6526 | ||
6527 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
6528 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
6529 | dwarf2_per_objfile->n_type_units); | |
6530 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
6531 | tu_stats->nr_uniq_abbrev_tables); | |
6532 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
6533 | tu_stats->nr_symtabs); | |
6534 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
6535 | tu_stats->nr_symtab_sharers); | |
6536 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
6537 | tu_stats->nr_stmt_less_type_units); | |
6538 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
6539 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
6540 | } |
6541 | ||
f4dc4d17 DE |
6542 | /* Traversal function for build_type_psymtabs. */ |
6543 | ||
6544 | static int | |
6545 | build_type_psymtab_dependencies (void **slot, void *info) | |
6546 | { | |
6547 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6548 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 6549 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 6550 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
6551 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
6552 | struct signatured_type *iter; | |
f4dc4d17 DE |
6553 | int i; |
6554 | ||
6555 | gdb_assert (len > 0); | |
0186c6a7 | 6556 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
6557 | |
6558 | pst->number_of_dependencies = len; | |
8d749320 SM |
6559 | pst->dependencies = |
6560 | XOBNEWVEC (&objfile->objfile_obstack, struct partial_symtab *, len); | |
f4dc4d17 | 6561 | for (i = 0; |
0186c6a7 | 6562 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
6563 | ++i) |
6564 | { | |
0186c6a7 DE |
6565 | gdb_assert (iter->per_cu.is_debug_types); |
6566 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 6567 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
6568 | } |
6569 | ||
0186c6a7 | 6570 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
6571 | |
6572 | return 1; | |
6573 | } | |
6574 | ||
6575 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
6576 | Build partial symbol tables for the .debug_types comp-units. */ | |
6577 | ||
6578 | static void | |
6579 | build_type_psymtabs (struct objfile *objfile) | |
6580 | { | |
0e50663e | 6581 | if (! create_all_type_units (objfile)) |
348e048f DE |
6582 | return; |
6583 | ||
73051182 | 6584 | build_type_psymtabs_1 (); |
6aa5f3a6 | 6585 | } |
f4dc4d17 | 6586 | |
6aa5f3a6 DE |
6587 | /* Traversal function for process_skeletonless_type_unit. |
6588 | Read a TU in a DWO file and build partial symbols for it. */ | |
6589 | ||
6590 | static int | |
6591 | process_skeletonless_type_unit (void **slot, void *info) | |
6592 | { | |
6593 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9a3c8263 | 6594 | struct objfile *objfile = (struct objfile *) info; |
6aa5f3a6 DE |
6595 | struct signatured_type find_entry, *entry; |
6596 | ||
6597 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
6598 | ||
6599 | if (dwarf2_per_objfile->signatured_types == NULL) | |
6600 | { | |
6601 | dwarf2_per_objfile->signatured_types | |
6602 | = allocate_signatured_type_table (objfile); | |
6603 | } | |
6604 | ||
6605 | find_entry.signature = dwo_unit->signature; | |
6606 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
6607 | INSERT); | |
6608 | /* If we've already seen this type there's nothing to do. What's happening | |
6609 | is we're doing our own version of comdat-folding here. */ | |
6610 | if (*slot != NULL) | |
6611 | return 1; | |
6612 | ||
6613 | /* This does the job that create_all_type_units would have done for | |
6614 | this TU. */ | |
6615 | entry = add_type_unit (dwo_unit->signature, slot); | |
6616 | fill_in_sig_entry_from_dwo_entry (objfile, entry, dwo_unit); | |
6617 | *slot = entry; | |
6618 | ||
6619 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6620 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, | |
6621 | build_type_psymtabs_reader, NULL); | |
6622 | ||
6623 | return 1; | |
6624 | } | |
6625 | ||
6626 | /* Traversal function for process_skeletonless_type_units. */ | |
6627 | ||
6628 | static int | |
6629 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
6630 | { | |
6631 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
6632 | ||
6633 | if (dwo_file->tus != NULL) | |
6634 | { | |
6635 | htab_traverse_noresize (dwo_file->tus, | |
6636 | process_skeletonless_type_unit, info); | |
6637 | } | |
6638 | ||
6639 | return 1; | |
6640 | } | |
6641 | ||
6642 | /* Scan all TUs of DWO files, verifying we've processed them. | |
6643 | This is needed in case a TU was emitted without its skeleton. | |
6644 | Note: This can't be done until we know what all the DWO files are. */ | |
6645 | ||
6646 | static void | |
6647 | process_skeletonless_type_units (struct objfile *objfile) | |
6648 | { | |
6649 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
6650 | if (get_dwp_file () == NULL | |
6651 | && dwarf2_per_objfile->dwo_files != NULL) | |
6652 | { | |
6653 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files, | |
6654 | process_dwo_file_for_skeletonless_type_units, | |
6655 | objfile); | |
6656 | } | |
348e048f DE |
6657 | } |
6658 | ||
60606b2c TT |
6659 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6660 | ||
6661 | static void | |
6662 | psymtabs_addrmap_cleanup (void *o) | |
6663 | { | |
9a3c8263 | 6664 | struct objfile *objfile = (struct objfile *) o; |
ec61707d | 6665 | |
60606b2c TT |
6666 | objfile->psymtabs_addrmap = NULL; |
6667 | } | |
6668 | ||
95554aad TT |
6669 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6670 | ||
6671 | static void | |
6672 | set_partial_user (struct objfile *objfile) | |
6673 | { | |
6674 | int i; | |
6675 | ||
6676 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6677 | { | |
8832e7e3 | 6678 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
95554aad TT |
6679 | struct partial_symtab *pst = per_cu->v.psymtab; |
6680 | int j; | |
6681 | ||
36586728 TT |
6682 | if (pst == NULL) |
6683 | continue; | |
6684 | ||
95554aad TT |
6685 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6686 | { | |
6687 | /* Set the 'user' field only if it is not already set. */ | |
6688 | if (pst->dependencies[j]->user == NULL) | |
6689 | pst->dependencies[j]->user = pst; | |
6690 | } | |
6691 | } | |
6692 | } | |
6693 | ||
93311388 DE |
6694 | /* Build the partial symbol table by doing a quick pass through the |
6695 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6696 | |
93311388 | 6697 | static void |
c67a9c90 | 6698 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6699 | { |
60606b2c | 6700 | struct cleanup *back_to, *addrmap_cleanup; |
21b2bd31 | 6701 | int i; |
93311388 | 6702 | |
b4f54984 | 6703 | if (dwarf_read_debug) |
45cfd468 DE |
6704 | { |
6705 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6706 | objfile_name (objfile)); |
45cfd468 DE |
6707 | } |
6708 | ||
98bfdba5 PA |
6709 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6710 | ||
be391dca | 6711 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6712 | |
93311388 DE |
6713 | /* Any cached compilation units will be linked by the per-objfile |
6714 | read_in_chain. Make sure to free them when we're done. */ | |
6715 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6716 | |
348e048f DE |
6717 | build_type_psymtabs (objfile); |
6718 | ||
93311388 | 6719 | create_all_comp_units (objfile); |
c906108c | 6720 | |
60606b2c TT |
6721 | /* Create a temporary address map on a temporary obstack. We later |
6722 | copy this to the final obstack. */ | |
8268c778 | 6723 | auto_obstack temp_obstack; |
60606b2c TT |
6724 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); |
6725 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6726 | |
21b2bd31 | 6727 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6728 | { |
8832e7e3 | 6729 | struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i); |
aaa75496 | 6730 | |
b93601f3 | 6731 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6732 | } |
ff013f42 | 6733 | |
6aa5f3a6 DE |
6734 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
6735 | process_skeletonless_type_units (objfile); | |
6736 | ||
6737 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6738 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
6739 | { | |
6740 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6741 | build_type_psymtab_dependencies, NULL); | |
6742 | } | |
6743 | ||
b4f54984 | 6744 | if (dwarf_read_debug) |
6aa5f3a6 DE |
6745 | print_tu_stats (); |
6746 | ||
95554aad TT |
6747 | set_partial_user (objfile); |
6748 | ||
ff013f42 JK |
6749 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6750 | &objfile->objfile_obstack); | |
60606b2c | 6751 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6752 | |
ae038cb0 | 6753 | do_cleanups (back_to); |
45cfd468 | 6754 | |
b4f54984 | 6755 | if (dwarf_read_debug) |
45cfd468 | 6756 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 6757 | objfile_name (objfile)); |
ae038cb0 DJ |
6758 | } |
6759 | ||
3019eac3 | 6760 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6761 | |
6762 | static void | |
dee91e82 | 6763 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6764 | const gdb_byte *info_ptr, |
dee91e82 DE |
6765 | struct die_info *comp_unit_die, |
6766 | int has_children, | |
6767 | void *data) | |
ae038cb0 | 6768 | { |
dee91e82 | 6769 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6770 | |
95554aad | 6771 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6772 | |
ae038cb0 DJ |
6773 | /* Check if comp unit has_children. |
6774 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6775 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6776 | if (has_children) |
dee91e82 DE |
6777 | load_partial_dies (reader, info_ptr, 0); |
6778 | } | |
98bfdba5 | 6779 | |
dee91e82 DE |
6780 | /* Load the partial DIEs for a secondary CU into memory. |
6781 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6782 | |
dee91e82 DE |
6783 | static void |
6784 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6785 | { | |
f4dc4d17 DE |
6786 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6787 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6788 | } |
6789 | ||
ae038cb0 | 6790 | static void |
36586728 TT |
6791 | read_comp_units_from_section (struct objfile *objfile, |
6792 | struct dwarf2_section_info *section, | |
f1902523 | 6793 | struct dwarf2_section_info *abbrev_section, |
36586728 TT |
6794 | unsigned int is_dwz, |
6795 | int *n_allocated, | |
6796 | int *n_comp_units, | |
6797 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6798 | { |
d521ce57 | 6799 | const gdb_byte *info_ptr; |
a32a8923 | 6800 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6801 | |
b4f54984 | 6802 | if (dwarf_read_debug) |
bf6af496 | 6803 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
6804 | get_section_name (section), |
6805 | get_section_file_name (section)); | |
bf6af496 | 6806 | |
36586728 | 6807 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6808 | |
36586728 | 6809 | info_ptr = section->buffer; |
6e70227d | 6810 | |
36586728 | 6811 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6812 | { |
ae038cb0 | 6813 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 6814 | |
9c541725 | 6815 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 6816 | |
f1902523 JK |
6817 | comp_unit_head cu_header; |
6818 | read_and_check_comp_unit_head (&cu_header, section, abbrev_section, | |
6819 | info_ptr, rcuh_kind::COMPILE); | |
ae038cb0 DJ |
6820 | |
6821 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
6822 | if (cu_header.unit_type != DW_UT_type) |
6823 | { | |
6824 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
6825 | struct dwarf2_per_cu_data); | |
6826 | memset (this_cu, 0, sizeof (*this_cu)); | |
6827 | } | |
6828 | else | |
6829 | { | |
6830 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
6831 | struct signatured_type); | |
6832 | memset (sig_type, 0, sizeof (*sig_type)); | |
6833 | sig_type->signature = cu_header.signature; | |
6834 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
6835 | this_cu = &sig_type->per_cu; | |
6836 | } | |
6837 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 6838 | this_cu->sect_off = sect_off; |
f1902523 | 6839 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 6840 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6841 | this_cu->objfile = objfile; |
8a0459fd | 6842 | this_cu->section = section; |
ae038cb0 | 6843 | |
36586728 | 6844 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6845 | { |
36586728 | 6846 | *n_allocated *= 2; |
224c3ddb SM |
6847 | *all_comp_units = XRESIZEVEC (struct dwarf2_per_cu_data *, |
6848 | *all_comp_units, *n_allocated); | |
ae038cb0 | 6849 | } |
36586728 TT |
6850 | (*all_comp_units)[*n_comp_units] = this_cu; |
6851 | ++*n_comp_units; | |
ae038cb0 DJ |
6852 | |
6853 | info_ptr = info_ptr + this_cu->length; | |
6854 | } | |
36586728 TT |
6855 | } |
6856 | ||
6857 | /* Create a list of all compilation units in OBJFILE. | |
6858 | This is only done for -readnow and building partial symtabs. */ | |
6859 | ||
6860 | static void | |
6861 | create_all_comp_units (struct objfile *objfile) | |
6862 | { | |
6863 | int n_allocated; | |
6864 | int n_comp_units; | |
6865 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6866 | struct dwz_file *dwz; |
36586728 TT |
6867 | |
6868 | n_comp_units = 0; | |
6869 | n_allocated = 10; | |
8d749320 | 6870 | all_comp_units = XNEWVEC (struct dwarf2_per_cu_data *, n_allocated); |
36586728 | 6871 | |
f1902523 JK |
6872 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, |
6873 | &dwarf2_per_objfile->abbrev, 0, | |
36586728 TT |
6874 | &n_allocated, &n_comp_units, &all_comp_units); |
6875 | ||
4db1a1dc TT |
6876 | dwz = dwarf2_get_dwz_file (); |
6877 | if (dwz != NULL) | |
f1902523 | 6878 | read_comp_units_from_section (objfile, &dwz->info, &dwz->abbrev, 1, |
4db1a1dc TT |
6879 | &n_allocated, &n_comp_units, |
6880 | &all_comp_units); | |
ae038cb0 | 6881 | |
8d749320 SM |
6882 | dwarf2_per_objfile->all_comp_units = XOBNEWVEC (&objfile->objfile_obstack, |
6883 | struct dwarf2_per_cu_data *, | |
6884 | n_comp_units); | |
ae038cb0 DJ |
6885 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, |
6886 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6887 | xfree (all_comp_units); | |
6888 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6889 | } |
6890 | ||
5734ee8b | 6891 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 6892 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 6893 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
6894 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
6895 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 6896 | |
72bf9492 DJ |
6897 | static void |
6898 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
6899 | CORE_ADDR *highpc, int set_addrmap, |
6900 | struct dwarf2_cu *cu) | |
c906108c | 6901 | { |
72bf9492 | 6902 | struct partial_die_info *pdi; |
c906108c | 6903 | |
91c24f0a DC |
6904 | /* Now, march along the PDI's, descending into ones which have |
6905 | interesting children but skipping the children of the other ones, | |
6906 | until we reach the end of the compilation unit. */ | |
c906108c | 6907 | |
72bf9492 | 6908 | pdi = first_die; |
91c24f0a | 6909 | |
72bf9492 DJ |
6910 | while (pdi != NULL) |
6911 | { | |
6912 | fixup_partial_die (pdi, cu); | |
c906108c | 6913 | |
f55ee35c | 6914 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6915 | children, so we need to look at them. Ditto for anonymous |
6916 | enums. */ | |
933c6fe4 | 6917 | |
72bf9492 | 6918 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6919 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6920 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6921 | { |
72bf9492 | 6922 | switch (pdi->tag) |
c906108c SS |
6923 | { |
6924 | case DW_TAG_subprogram: | |
cdc07690 | 6925 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 6926 | break; |
72929c62 | 6927 | case DW_TAG_constant: |
c906108c SS |
6928 | case DW_TAG_variable: |
6929 | case DW_TAG_typedef: | |
91c24f0a | 6930 | case DW_TAG_union_type: |
72bf9492 | 6931 | if (!pdi->is_declaration) |
63d06c5c | 6932 | { |
72bf9492 | 6933 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6934 | } |
6935 | break; | |
c906108c | 6936 | case DW_TAG_class_type: |
680b30c7 | 6937 | case DW_TAG_interface_type: |
c906108c | 6938 | case DW_TAG_structure_type: |
72bf9492 | 6939 | if (!pdi->is_declaration) |
c906108c | 6940 | { |
72bf9492 | 6941 | add_partial_symbol (pdi, cu); |
c906108c | 6942 | } |
e98c9e7c TT |
6943 | if (cu->language == language_rust && pdi->has_children) |
6944 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
6945 | set_addrmap, cu); | |
c906108c | 6946 | break; |
91c24f0a | 6947 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6948 | if (!pdi->is_declaration) |
6949 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6950 | break; |
6951 | case DW_TAG_base_type: | |
a02abb62 | 6952 | case DW_TAG_subrange_type: |
c906108c | 6953 | /* File scope base type definitions are added to the partial |
c5aa993b | 6954 | symbol table. */ |
72bf9492 | 6955 | add_partial_symbol (pdi, cu); |
c906108c | 6956 | break; |
d9fa45fe | 6957 | case DW_TAG_namespace: |
cdc07690 | 6958 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 6959 | break; |
5d7cb8df | 6960 | case DW_TAG_module: |
cdc07690 | 6961 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); |
5d7cb8df | 6962 | break; |
95554aad TT |
6963 | case DW_TAG_imported_unit: |
6964 | { | |
6965 | struct dwarf2_per_cu_data *per_cu; | |
6966 | ||
f4dc4d17 DE |
6967 | /* For now we don't handle imported units in type units. */ |
6968 | if (cu->per_cu->is_debug_types) | |
6969 | { | |
6970 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6971 | " supported in type units [in module %s]"), | |
4262abfb | 6972 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6973 | } |
6974 | ||
9c541725 | 6975 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.sect_off, |
36586728 | 6976 | pdi->is_dwz, |
95554aad TT |
6977 | cu->objfile); |
6978 | ||
6979 | /* Go read the partial unit, if needed. */ | |
6980 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6981 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6982 | |
f4dc4d17 | 6983 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6984 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6985 | } |
6986 | break; | |
74921315 KS |
6987 | case DW_TAG_imported_declaration: |
6988 | add_partial_symbol (pdi, cu); | |
6989 | break; | |
c906108c SS |
6990 | default: |
6991 | break; | |
6992 | } | |
6993 | } | |
6994 | ||
72bf9492 DJ |
6995 | /* If the die has a sibling, skip to the sibling. */ |
6996 | ||
6997 | pdi = pdi->die_sibling; | |
6998 | } | |
6999 | } | |
7000 | ||
7001 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7002 | |
72bf9492 | 7003 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7004 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7005 | Enumerators are an exception; they use the scope of their parent |
7006 | enumeration type, i.e. the name of the enumeration type is not | |
7007 | prepended to the enumerator. | |
91c24f0a | 7008 | |
72bf9492 DJ |
7009 | There are two complexities. One is DW_AT_specification; in this |
7010 | case "parent" means the parent of the target of the specification, | |
7011 | instead of the direct parent of the DIE. The other is compilers | |
7012 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7013 | the fully qualified name of structure types from their members' | |
7014 | linkage names. This must be done using the DIE's children rather | |
7015 | than the children of any DW_AT_specification target. We only need | |
7016 | to do this for structures at the top level, i.e. if the target of | |
7017 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7018 | have a parent. */ | |
7019 | ||
7020 | /* Compute the scope prefix associated with PDI's parent, in | |
7021 | compilation unit CU. The result will be allocated on CU's | |
7022 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7023 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7024 | static const char * |
72bf9492 DJ |
7025 | partial_die_parent_scope (struct partial_die_info *pdi, |
7026 | struct dwarf2_cu *cu) | |
7027 | { | |
15d034d0 | 7028 | const char *grandparent_scope; |
72bf9492 | 7029 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7030 | |
72bf9492 DJ |
7031 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7032 | then this means the parent of the specification DIE. */ | |
7033 | ||
7034 | real_pdi = pdi; | |
72bf9492 | 7035 | while (real_pdi->has_specification) |
36586728 TT |
7036 | real_pdi = find_partial_die (real_pdi->spec_offset, |
7037 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
7038 | |
7039 | parent = real_pdi->die_parent; | |
7040 | if (parent == NULL) | |
7041 | return NULL; | |
7042 | ||
7043 | if (parent->scope_set) | |
7044 | return parent->scope; | |
7045 | ||
7046 | fixup_partial_die (parent, cu); | |
7047 | ||
10b3939b | 7048 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7049 | |
acebe513 UW |
7050 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7051 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7052 | Work around this problem here. */ | |
7053 | if (cu->language == language_cplus | |
6e70227d | 7054 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
7055 | && strcmp (parent->name, "::") == 0 |
7056 | && grandparent_scope == NULL) | |
7057 | { | |
7058 | parent->scope = NULL; | |
7059 | parent->scope_set = 1; | |
7060 | return NULL; | |
7061 | } | |
7062 | ||
9c6c53f7 SA |
7063 | if (pdi->tag == DW_TAG_enumerator) |
7064 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7065 | parent->scope = grandparent_scope; | |
7066 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7067 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7068 | || parent->tag == DW_TAG_structure_type |
7069 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7070 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
7071 | || parent->tag == DW_TAG_union_type |
7072 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
7073 | { |
7074 | if (grandparent_scope == NULL) | |
7075 | parent->scope = parent->name; | |
7076 | else | |
3e43a32a MS |
7077 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7078 | grandparent_scope, | |
f55ee35c | 7079 | parent->name, 0, cu); |
72bf9492 | 7080 | } |
72bf9492 DJ |
7081 | else |
7082 | { | |
7083 | /* FIXME drow/2004-04-01: What should we be doing with | |
7084 | function-local names? For partial symbols, we should probably be | |
7085 | ignoring them. */ | |
7086 | complaint (&symfile_complaints, | |
e2e0b3e5 | 7087 | _("unhandled containing DIE tag %d for DIE at %d"), |
9c541725 | 7088 | parent->tag, to_underlying (pdi->sect_off)); |
72bf9492 | 7089 | parent->scope = grandparent_scope; |
c906108c SS |
7090 | } |
7091 | ||
72bf9492 DJ |
7092 | parent->scope_set = 1; |
7093 | return parent->scope; | |
7094 | } | |
7095 | ||
7096 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7097 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7098 | |
72bf9492 DJ |
7099 | static char * |
7100 | partial_die_full_name (struct partial_die_info *pdi, | |
7101 | struct dwarf2_cu *cu) | |
7102 | { | |
15d034d0 | 7103 | const char *parent_scope; |
72bf9492 | 7104 | |
98bfdba5 PA |
7105 | /* If this is a template instantiation, we can not work out the |
7106 | template arguments from partial DIEs. So, unfortunately, we have | |
7107 | to go through the full DIEs. At least any work we do building | |
7108 | types here will be reused if full symbols are loaded later. */ | |
7109 | if (pdi->has_template_arguments) | |
7110 | { | |
7111 | fixup_partial_die (pdi, cu); | |
7112 | ||
7113 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
7114 | { | |
7115 | struct die_info *die; | |
7116 | struct attribute attr; | |
7117 | struct dwarf2_cu *ref_cu = cu; | |
7118 | ||
b64f50a1 | 7119 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7120 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7121 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7122 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7123 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7124 | ||
7125 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
7126 | } | |
7127 | } | |
7128 | ||
72bf9492 DJ |
7129 | parent_scope = partial_die_parent_scope (pdi, cu); |
7130 | if (parent_scope == NULL) | |
7131 | return NULL; | |
7132 | else | |
f55ee35c | 7133 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
7134 | } |
7135 | ||
7136 | static void | |
72bf9492 | 7137 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7138 | { |
e7c27a73 | 7139 | struct objfile *objfile = cu->objfile; |
3e29f34a | 7140 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 7141 | CORE_ADDR addr = 0; |
15d034d0 | 7142 | const char *actual_name = NULL; |
e142c38c | 7143 | CORE_ADDR baseaddr; |
15d034d0 | 7144 | char *built_actual_name; |
e142c38c DJ |
7145 | |
7146 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 7147 | |
15d034d0 TT |
7148 | built_actual_name = partial_die_full_name (pdi, cu); |
7149 | if (built_actual_name != NULL) | |
7150 | actual_name = built_actual_name; | |
63d06c5c | 7151 | |
72bf9492 DJ |
7152 | if (actual_name == NULL) |
7153 | actual_name = pdi->name; | |
7154 | ||
c906108c SS |
7155 | switch (pdi->tag) |
7156 | { | |
7157 | case DW_TAG_subprogram: | |
3e29f34a | 7158 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr); |
2cfa0c8d | 7159 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 7160 | { |
2cfa0c8d JB |
7161 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
7162 | of the global scope. But in Ada, we want to be able to access | |
7163 | nested procedures globally. So all Ada subprograms are stored | |
7164 | in the global scope. */ | |
f47fb265 | 7165 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7166 | built_actual_name != NULL, |
f47fb265 MS |
7167 | VAR_DOMAIN, LOC_BLOCK, |
7168 | &objfile->global_psymbols, | |
1762568f | 7169 | addr, cu->language, objfile); |
c906108c SS |
7170 | } |
7171 | else | |
7172 | { | |
f47fb265 | 7173 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7174 | built_actual_name != NULL, |
f47fb265 MS |
7175 | VAR_DOMAIN, LOC_BLOCK, |
7176 | &objfile->static_psymbols, | |
1762568f | 7177 | addr, cu->language, objfile); |
c906108c | 7178 | } |
0c1b455e TT |
7179 | |
7180 | if (pdi->main_subprogram && actual_name != NULL) | |
7181 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7182 | break; |
72929c62 JB |
7183 | case DW_TAG_constant: |
7184 | { | |
7185 | struct psymbol_allocation_list *list; | |
7186 | ||
7187 | if (pdi->is_external) | |
7188 | list = &objfile->global_psymbols; | |
7189 | else | |
7190 | list = &objfile->static_psymbols; | |
f47fb265 | 7191 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7192 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
1762568f | 7193 | list, 0, cu->language, objfile); |
72929c62 JB |
7194 | } |
7195 | break; | |
c906108c | 7196 | case DW_TAG_variable: |
95554aad TT |
7197 | if (pdi->d.locdesc) |
7198 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 7199 | |
95554aad | 7200 | if (pdi->d.locdesc |
caac4577 JG |
7201 | && addr == 0 |
7202 | && !dwarf2_per_objfile->has_section_at_zero) | |
7203 | { | |
7204 | /* A global or static variable may also have been stripped | |
7205 | out by the linker if unused, in which case its address | |
7206 | will be nullified; do not add such variables into partial | |
7207 | symbol table then. */ | |
7208 | } | |
7209 | else if (pdi->is_external) | |
c906108c SS |
7210 | { |
7211 | /* Global Variable. | |
7212 | Don't enter into the minimal symbol tables as there is | |
7213 | a minimal symbol table entry from the ELF symbols already. | |
7214 | Enter into partial symbol table if it has a location | |
7215 | descriptor or a type. | |
7216 | If the location descriptor is missing, new_symbol will create | |
7217 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
7218 | be determined from the minimal symbol table whenever the variable | |
7219 | is referenced. | |
7220 | The address for the partial symbol table entry is not | |
7221 | used by GDB, but it comes in handy for debugging partial symbol | |
7222 | table building. */ | |
7223 | ||
95554aad | 7224 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 7225 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7226 | built_actual_name != NULL, |
f47fb265 MS |
7227 | VAR_DOMAIN, LOC_STATIC, |
7228 | &objfile->global_psymbols, | |
1762568f | 7229 | addr + baseaddr, |
f47fb265 | 7230 | cu->language, objfile); |
c906108c SS |
7231 | } |
7232 | else | |
7233 | { | |
ff908ebf AW |
7234 | int has_loc = pdi->d.locdesc != NULL; |
7235 | ||
7236 | /* Static Variable. Skip symbols whose value we cannot know (those | |
7237 | without location descriptors or constant values). */ | |
7238 | if (!has_loc && !pdi->has_const_value) | |
decbce07 | 7239 | { |
15d034d0 | 7240 | xfree (built_actual_name); |
decbce07 MS |
7241 | return; |
7242 | } | |
ff908ebf | 7243 | |
f47fb265 | 7244 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7245 | built_actual_name != NULL, |
f47fb265 MS |
7246 | VAR_DOMAIN, LOC_STATIC, |
7247 | &objfile->static_psymbols, | |
ff908ebf | 7248 | has_loc ? addr + baseaddr : (CORE_ADDR) 0, |
f47fb265 | 7249 | cu->language, objfile); |
c906108c SS |
7250 | } |
7251 | break; | |
7252 | case DW_TAG_typedef: | |
7253 | case DW_TAG_base_type: | |
a02abb62 | 7254 | case DW_TAG_subrange_type: |
38d518c9 | 7255 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7256 | built_actual_name != NULL, |
176620f1 | 7257 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 7258 | &objfile->static_psymbols, |
1762568f | 7259 | 0, cu->language, objfile); |
c906108c | 7260 | break; |
74921315 | 7261 | case DW_TAG_imported_declaration: |
72bf9492 DJ |
7262 | case DW_TAG_namespace: |
7263 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 7264 | built_actual_name != NULL, |
72bf9492 DJ |
7265 | VAR_DOMAIN, LOC_TYPEDEF, |
7266 | &objfile->global_psymbols, | |
1762568f | 7267 | 0, cu->language, objfile); |
72bf9492 | 7268 | break; |
530e8392 KB |
7269 | case DW_TAG_module: |
7270 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
7271 | built_actual_name != NULL, | |
7272 | MODULE_DOMAIN, LOC_TYPEDEF, | |
7273 | &objfile->global_psymbols, | |
1762568f | 7274 | 0, cu->language, objfile); |
530e8392 | 7275 | break; |
c906108c | 7276 | case DW_TAG_class_type: |
680b30c7 | 7277 | case DW_TAG_interface_type: |
c906108c SS |
7278 | case DW_TAG_structure_type: |
7279 | case DW_TAG_union_type: | |
7280 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
7281 | /* Skip external references. The DWARF standard says in the section |
7282 | about "Structure, Union, and Class Type Entries": "An incomplete | |
7283 | structure, union or class type is represented by a structure, | |
7284 | union or class entry that does not have a byte size attribute | |
7285 | and that has a DW_AT_declaration attribute." */ | |
7286 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 7287 | { |
15d034d0 | 7288 | xfree (built_actual_name); |
decbce07 MS |
7289 | return; |
7290 | } | |
fa4028e9 | 7291 | |
63d06c5c DC |
7292 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7293 | static vs. global. */ | |
38d518c9 | 7294 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7295 | built_actual_name != NULL, |
176620f1 | 7296 | STRUCT_DOMAIN, LOC_TYPEDEF, |
9c37b5ae | 7297 | cu->language == language_cplus |
63d06c5c DC |
7298 | ? &objfile->global_psymbols |
7299 | : &objfile->static_psymbols, | |
1762568f | 7300 | 0, cu->language, objfile); |
c906108c | 7301 | |
c906108c SS |
7302 | break; |
7303 | case DW_TAG_enumerator: | |
38d518c9 | 7304 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 7305 | built_actual_name != NULL, |
176620f1 | 7306 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 7307 | cu->language == language_cplus |
f6fe98ef DJ |
7308 | ? &objfile->global_psymbols |
7309 | : &objfile->static_psymbols, | |
1762568f | 7310 | 0, cu->language, objfile); |
c906108c SS |
7311 | break; |
7312 | default: | |
7313 | break; | |
7314 | } | |
5c4e30ca | 7315 | |
15d034d0 | 7316 | xfree (built_actual_name); |
c906108c SS |
7317 | } |
7318 | ||
5c4e30ca DC |
7319 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7320 | corresponding to that namespace to the symbol table. NAMESPACE is | |
7321 | the name of the enclosing namespace. */ | |
91c24f0a | 7322 | |
72bf9492 DJ |
7323 | static void |
7324 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 7325 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 7326 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 7327 | { |
72bf9492 | 7328 | /* Add a symbol for the namespace. */ |
e7c27a73 | 7329 | |
72bf9492 | 7330 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
7331 | |
7332 | /* Now scan partial symbols in that namespace. */ | |
7333 | ||
91c24f0a | 7334 | if (pdi->has_children) |
cdc07690 | 7335 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
7336 | } |
7337 | ||
5d7cb8df JK |
7338 | /* Read a partial die corresponding to a Fortran module. */ |
7339 | ||
7340 | static void | |
7341 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 7342 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 7343 | { |
530e8392 KB |
7344 | /* Add a symbol for the namespace. */ |
7345 | ||
7346 | add_partial_symbol (pdi, cu); | |
7347 | ||
f55ee35c | 7348 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
7349 | |
7350 | if (pdi->has_children) | |
cdc07690 | 7351 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
7352 | } |
7353 | ||
bc30ff58 JB |
7354 | /* Read a partial die corresponding to a subprogram and create a partial |
7355 | symbol for that subprogram. When the CU language allows it, this | |
7356 | routine also defines a partial symbol for each nested subprogram | |
cdc07690 | 7357 | that this subprogram contains. If SET_ADDRMAP is true, record the |
428fc5fc YQ |
7358 | covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest |
7359 | and highest PC values found in PDI. | |
6e70227d | 7360 | |
cdc07690 YQ |
7361 | PDI may also be a lexical block, in which case we simply search |
7362 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
7363 | Again, this is only performed when the CU language allows this |
7364 | type of definitions. */ | |
7365 | ||
7366 | static void | |
7367 | add_partial_subprogram (struct partial_die_info *pdi, | |
7368 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 7369 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 JB |
7370 | { |
7371 | if (pdi->tag == DW_TAG_subprogram) | |
7372 | { | |
7373 | if (pdi->has_pc_info) | |
7374 | { | |
7375 | if (pdi->lowpc < *lowpc) | |
7376 | *lowpc = pdi->lowpc; | |
7377 | if (pdi->highpc > *highpc) | |
7378 | *highpc = pdi->highpc; | |
cdc07690 | 7379 | if (set_addrmap) |
5734ee8b | 7380 | { |
5734ee8b | 7381 | struct objfile *objfile = cu->objfile; |
3e29f34a MR |
7382 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
7383 | CORE_ADDR baseaddr; | |
7384 | CORE_ADDR highpc; | |
7385 | CORE_ADDR lowpc; | |
5734ee8b DJ |
7386 | |
7387 | baseaddr = ANOFFSET (objfile->section_offsets, | |
7388 | SECT_OFF_TEXT (objfile)); | |
3e29f34a MR |
7389 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, |
7390 | pdi->lowpc + baseaddr); | |
7391 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
7392 | pdi->highpc + baseaddr); | |
7393 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
9291a0cd | 7394 | cu->per_cu->v.psymtab); |
5734ee8b | 7395 | } |
481860b3 GB |
7396 | } |
7397 | ||
7398 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
7399 | { | |
bc30ff58 | 7400 | if (!pdi->is_declaration) |
e8d05480 JB |
7401 | /* Ignore subprogram DIEs that do not have a name, they are |
7402 | illegal. Do not emit a complaint at this point, we will | |
7403 | do so when we convert this psymtab into a symtab. */ | |
7404 | if (pdi->name) | |
7405 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
7406 | } |
7407 | } | |
6e70227d | 7408 | |
bc30ff58 JB |
7409 | if (! pdi->has_children) |
7410 | return; | |
7411 | ||
7412 | if (cu->language == language_ada) | |
7413 | { | |
7414 | pdi = pdi->die_child; | |
7415 | while (pdi != NULL) | |
7416 | { | |
7417 | fixup_partial_die (pdi, cu); | |
7418 | if (pdi->tag == DW_TAG_subprogram | |
7419 | || pdi->tag == DW_TAG_lexical_block) | |
cdc07690 | 7420 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
7421 | pdi = pdi->die_sibling; |
7422 | } | |
7423 | } | |
7424 | } | |
7425 | ||
91c24f0a DC |
7426 | /* Read a partial die corresponding to an enumeration type. */ |
7427 | ||
72bf9492 DJ |
7428 | static void |
7429 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
7430 | struct dwarf2_cu *cu) | |
91c24f0a | 7431 | { |
72bf9492 | 7432 | struct partial_die_info *pdi; |
91c24f0a DC |
7433 | |
7434 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
7435 | add_partial_symbol (enum_pdi, cu); |
7436 | ||
7437 | pdi = enum_pdi->die_child; | |
7438 | while (pdi) | |
91c24f0a | 7439 | { |
72bf9492 | 7440 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 7441 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 7442 | else |
72bf9492 DJ |
7443 | add_partial_symbol (pdi, cu); |
7444 | pdi = pdi->die_sibling; | |
91c24f0a | 7445 | } |
91c24f0a DC |
7446 | } |
7447 | ||
6caca83c CC |
7448 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
7449 | ||
7450 | static unsigned int | |
d521ce57 | 7451 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
7452 | { |
7453 | unsigned int bytes_read; | |
7454 | ||
7455 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7456 | } | |
7457 | ||
4bb7a0a7 DJ |
7458 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
7459 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
7460 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
7461 | the initial number. */ | |
7462 | ||
7463 | static struct abbrev_info * | |
d521ce57 | 7464 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 7465 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
7466 | { |
7467 | bfd *abfd = cu->objfile->obfd; | |
7468 | unsigned int abbrev_number; | |
7469 | struct abbrev_info *abbrev; | |
7470 | ||
7471 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
7472 | ||
7473 | if (abbrev_number == 0) | |
7474 | return NULL; | |
7475 | ||
433df2d4 | 7476 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
7477 | if (!abbrev) |
7478 | { | |
422b9917 DE |
7479 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
7480 | " at offset 0x%x [in module %s]"), | |
7481 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", | |
9c541725 | 7482 | to_underlying (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
7483 | } |
7484 | ||
7485 | return abbrev; | |
7486 | } | |
7487 | ||
93311388 DE |
7488 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7489 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
7490 | DIE. Any children of the skipped DIEs will also be skipped. */ |
7491 | ||
d521ce57 TT |
7492 | static const gdb_byte * |
7493 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 7494 | { |
dee91e82 | 7495 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
7496 | struct abbrev_info *abbrev; |
7497 | unsigned int bytes_read; | |
7498 | ||
7499 | while (1) | |
7500 | { | |
7501 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
7502 | if (abbrev == NULL) | |
7503 | return info_ptr + bytes_read; | |
7504 | else | |
dee91e82 | 7505 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
7506 | } |
7507 | } | |
7508 | ||
93311388 DE |
7509 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
7510 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
7511 | abbrev corresponding to that skipped uleb128 should be passed in |
7512 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
7513 | children. */ | |
7514 | ||
d521ce57 TT |
7515 | static const gdb_byte * |
7516 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 7517 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
7518 | { |
7519 | unsigned int bytes_read; | |
7520 | struct attribute attr; | |
dee91e82 DE |
7521 | bfd *abfd = reader->abfd; |
7522 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 7523 | const gdb_byte *buffer = reader->buffer; |
f664829e | 7524 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
7525 | unsigned int form, i; |
7526 | ||
7527 | for (i = 0; i < abbrev->num_attrs; i++) | |
7528 | { | |
7529 | /* The only abbrev we care about is DW_AT_sibling. */ | |
7530 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
7531 | { | |
dee91e82 | 7532 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 7533 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
7534 | complaint (&symfile_complaints, |
7535 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 7536 | else |
b9502d3f | 7537 | { |
9c541725 PA |
7538 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
7539 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
7540 | |
7541 | if (sibling_ptr < info_ptr) | |
7542 | complaint (&symfile_complaints, | |
7543 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
7544 | else if (sibling_ptr > reader->buffer_end) |
7545 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
7546 | else |
7547 | return sibling_ptr; | |
7548 | } | |
4bb7a0a7 DJ |
7549 | } |
7550 | ||
7551 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
7552 | form = abbrev->attrs[i].form; | |
7553 | skip_attribute: | |
7554 | switch (form) | |
7555 | { | |
4bb7a0a7 | 7556 | case DW_FORM_ref_addr: |
ae411497 TT |
7557 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
7558 | and later it is offset sized. */ | |
7559 | if (cu->header.version == 2) | |
7560 | info_ptr += cu->header.addr_size; | |
7561 | else | |
7562 | info_ptr += cu->header.offset_size; | |
7563 | break; | |
36586728 TT |
7564 | case DW_FORM_GNU_ref_alt: |
7565 | info_ptr += cu->header.offset_size; | |
7566 | break; | |
ae411497 | 7567 | case DW_FORM_addr: |
4bb7a0a7 DJ |
7568 | info_ptr += cu->header.addr_size; |
7569 | break; | |
7570 | case DW_FORM_data1: | |
7571 | case DW_FORM_ref1: | |
7572 | case DW_FORM_flag: | |
7573 | info_ptr += 1; | |
7574 | break; | |
2dc7f7b3 | 7575 | case DW_FORM_flag_present: |
43988095 | 7576 | case DW_FORM_implicit_const: |
2dc7f7b3 | 7577 | break; |
4bb7a0a7 DJ |
7578 | case DW_FORM_data2: |
7579 | case DW_FORM_ref2: | |
7580 | info_ptr += 2; | |
7581 | break; | |
7582 | case DW_FORM_data4: | |
7583 | case DW_FORM_ref4: | |
7584 | info_ptr += 4; | |
7585 | break; | |
7586 | case DW_FORM_data8: | |
7587 | case DW_FORM_ref8: | |
55f1336d | 7588 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
7589 | info_ptr += 8; |
7590 | break; | |
0224619f JK |
7591 | case DW_FORM_data16: |
7592 | info_ptr += 16; | |
7593 | break; | |
4bb7a0a7 | 7594 | case DW_FORM_string: |
9b1c24c8 | 7595 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
7596 | info_ptr += bytes_read; |
7597 | break; | |
2dc7f7b3 | 7598 | case DW_FORM_sec_offset: |
4bb7a0a7 | 7599 | case DW_FORM_strp: |
36586728 | 7600 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
7601 | info_ptr += cu->header.offset_size; |
7602 | break; | |
2dc7f7b3 | 7603 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
7604 | case DW_FORM_block: |
7605 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7606 | info_ptr += bytes_read; | |
7607 | break; | |
7608 | case DW_FORM_block1: | |
7609 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
7610 | break; | |
7611 | case DW_FORM_block2: | |
7612 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
7613 | break; | |
7614 | case DW_FORM_block4: | |
7615 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
7616 | break; | |
7617 | case DW_FORM_sdata: | |
7618 | case DW_FORM_udata: | |
7619 | case DW_FORM_ref_udata: | |
3019eac3 DE |
7620 | case DW_FORM_GNU_addr_index: |
7621 | case DW_FORM_GNU_str_index: | |
d521ce57 | 7622 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
7623 | break; |
7624 | case DW_FORM_indirect: | |
7625 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
7626 | info_ptr += bytes_read; | |
7627 | /* We need to continue parsing from here, so just go back to | |
7628 | the top. */ | |
7629 | goto skip_attribute; | |
7630 | ||
7631 | default: | |
3e43a32a MS |
7632 | error (_("Dwarf Error: Cannot handle %s " |
7633 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
7634 | dwarf_form_name (form), |
7635 | bfd_get_filename (abfd)); | |
7636 | } | |
7637 | } | |
7638 | ||
7639 | if (abbrev->has_children) | |
dee91e82 | 7640 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
7641 | else |
7642 | return info_ptr; | |
7643 | } | |
7644 | ||
93311388 | 7645 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 7646 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 7647 | |
d521ce57 | 7648 | static const gdb_byte * |
dee91e82 DE |
7649 | locate_pdi_sibling (const struct die_reader_specs *reader, |
7650 | struct partial_die_info *orig_pdi, | |
d521ce57 | 7651 | const gdb_byte *info_ptr) |
91c24f0a DC |
7652 | { |
7653 | /* Do we know the sibling already? */ | |
72bf9492 | 7654 | |
91c24f0a DC |
7655 | if (orig_pdi->sibling) |
7656 | return orig_pdi->sibling; | |
7657 | ||
7658 | /* Are there any children to deal with? */ | |
7659 | ||
7660 | if (!orig_pdi->has_children) | |
7661 | return info_ptr; | |
7662 | ||
4bb7a0a7 | 7663 | /* Skip the children the long way. */ |
91c24f0a | 7664 | |
dee91e82 | 7665 | return skip_children (reader, info_ptr); |
91c24f0a DC |
7666 | } |
7667 | ||
257e7a09 | 7668 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 7669 | not NULL. */ |
c906108c SS |
7670 | |
7671 | static void | |
257e7a09 YQ |
7672 | dwarf2_read_symtab (struct partial_symtab *self, |
7673 | struct objfile *objfile) | |
c906108c | 7674 | { |
257e7a09 | 7675 | if (self->readin) |
c906108c | 7676 | { |
442e4d9c | 7677 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 7678 | self->filename); |
442e4d9c YQ |
7679 | } |
7680 | else | |
7681 | { | |
7682 | if (info_verbose) | |
c906108c | 7683 | { |
442e4d9c | 7684 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 7685 | self->filename); |
442e4d9c | 7686 | gdb_flush (gdb_stdout); |
c906108c | 7687 | } |
c906108c | 7688 | |
442e4d9c | 7689 | /* Restore our global data. */ |
9a3c8263 SM |
7690 | dwarf2_per_objfile |
7691 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
7692 | dwarf2_objfile_data_key); | |
10b3939b | 7693 | |
442e4d9c YQ |
7694 | /* If this psymtab is constructed from a debug-only objfile, the |
7695 | has_section_at_zero flag will not necessarily be correct. We | |
7696 | can get the correct value for this flag by looking at the data | |
7697 | associated with the (presumably stripped) associated objfile. */ | |
7698 | if (objfile->separate_debug_objfile_backlink) | |
7699 | { | |
7700 | struct dwarf2_per_objfile *dpo_backlink | |
9a3c8263 SM |
7701 | = ((struct dwarf2_per_objfile *) |
7702 | objfile_data (objfile->separate_debug_objfile_backlink, | |
7703 | dwarf2_objfile_data_key)); | |
9a619af0 | 7704 | |
442e4d9c YQ |
7705 | dwarf2_per_objfile->has_section_at_zero |
7706 | = dpo_backlink->has_section_at_zero; | |
7707 | } | |
b2ab525c | 7708 | |
442e4d9c | 7709 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 7710 | |
257e7a09 | 7711 | psymtab_to_symtab_1 (self); |
c906108c | 7712 | |
442e4d9c YQ |
7713 | /* Finish up the debug error message. */ |
7714 | if (info_verbose) | |
7715 | printf_filtered (_("done.\n")); | |
c906108c | 7716 | } |
95554aad TT |
7717 | |
7718 | process_cu_includes (); | |
c906108c | 7719 | } |
9cdd5dbd DE |
7720 | \f |
7721 | /* Reading in full CUs. */ | |
c906108c | 7722 | |
10b3939b DJ |
7723 | /* Add PER_CU to the queue. */ |
7724 | ||
7725 | static void | |
95554aad TT |
7726 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7727 | enum language pretend_language) | |
10b3939b DJ |
7728 | { |
7729 | struct dwarf2_queue_item *item; | |
7730 | ||
7731 | per_cu->queued = 1; | |
8d749320 | 7732 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 7733 | item->per_cu = per_cu; |
95554aad | 7734 | item->pretend_language = pretend_language; |
10b3939b DJ |
7735 | item->next = NULL; |
7736 | ||
7737 | if (dwarf2_queue == NULL) | |
7738 | dwarf2_queue = item; | |
7739 | else | |
7740 | dwarf2_queue_tail->next = item; | |
7741 | ||
7742 | dwarf2_queue_tail = item; | |
7743 | } | |
7744 | ||
89e63ee4 DE |
7745 | /* If PER_CU is not yet queued, add it to the queue. |
7746 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7747 | dependency. | |
0907af0c | 7748 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7749 | meaning either PER_CU is already queued or it is already loaded. |
7750 | ||
7751 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7752 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7753 | |
7754 | static int | |
89e63ee4 | 7755 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7756 | struct dwarf2_per_cu_data *per_cu, |
7757 | enum language pretend_language) | |
7758 | { | |
7759 | /* We may arrive here during partial symbol reading, if we need full | |
7760 | DIEs to process an unusual case (e.g. template arguments). Do | |
7761 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7762 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7763 | { | |
7764 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7765 | return 1; | |
7766 | return 0; | |
7767 | } | |
7768 | ||
7769 | /* Mark the dependence relation so that we don't flush PER_CU | |
7770 | too early. */ | |
89e63ee4 DE |
7771 | if (dependent_cu != NULL) |
7772 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7773 | |
7774 | /* If it's already on the queue, we have nothing to do. */ | |
7775 | if (per_cu->queued) | |
7776 | return 0; | |
7777 | ||
7778 | /* If the compilation unit is already loaded, just mark it as | |
7779 | used. */ | |
7780 | if (per_cu->cu != NULL) | |
7781 | { | |
7782 | per_cu->cu->last_used = 0; | |
7783 | return 0; | |
7784 | } | |
7785 | ||
7786 | /* Add it to the queue. */ | |
7787 | queue_comp_unit (per_cu, pretend_language); | |
7788 | ||
7789 | return 1; | |
7790 | } | |
7791 | ||
10b3939b DJ |
7792 | /* Process the queue. */ |
7793 | ||
7794 | static void | |
a0f42c21 | 7795 | process_queue (void) |
10b3939b DJ |
7796 | { |
7797 | struct dwarf2_queue_item *item, *next_item; | |
7798 | ||
b4f54984 | 7799 | if (dwarf_read_debug) |
45cfd468 DE |
7800 | { |
7801 | fprintf_unfiltered (gdb_stdlog, | |
7802 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7803 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7804 | } |
7805 | ||
03dd20cc DJ |
7806 | /* The queue starts out with one item, but following a DIE reference |
7807 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7808 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7809 | { | |
cc12ce38 DE |
7810 | if ((dwarf2_per_objfile->using_index |
7811 | ? !item->per_cu->v.quick->compunit_symtab | |
7812 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
7813 | /* Skip dummy CUs. */ | |
7814 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
7815 | { |
7816 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 7817 | unsigned int debug_print_threshold; |
247f5c4f | 7818 | char buf[100]; |
f4dc4d17 | 7819 | |
247f5c4f | 7820 | if (per_cu->is_debug_types) |
f4dc4d17 | 7821 | { |
247f5c4f DE |
7822 | struct signatured_type *sig_type = |
7823 | (struct signatured_type *) per_cu; | |
7824 | ||
7825 | sprintf (buf, "TU %s at offset 0x%x", | |
73be47f5 | 7826 | hex_string (sig_type->signature), |
9c541725 | 7827 | to_underlying (per_cu->sect_off)); |
73be47f5 DE |
7828 | /* There can be 100s of TUs. |
7829 | Only print them in verbose mode. */ | |
7830 | debug_print_threshold = 2; | |
f4dc4d17 | 7831 | } |
247f5c4f | 7832 | else |
73be47f5 | 7833 | { |
9c541725 PA |
7834 | sprintf (buf, "CU at offset 0x%x", |
7835 | to_underlying (per_cu->sect_off)); | |
73be47f5 DE |
7836 | debug_print_threshold = 1; |
7837 | } | |
247f5c4f | 7838 | |
b4f54984 | 7839 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7840 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
7841 | |
7842 | if (per_cu->is_debug_types) | |
7843 | process_full_type_unit (per_cu, item->pretend_language); | |
7844 | else | |
7845 | process_full_comp_unit (per_cu, item->pretend_language); | |
7846 | ||
b4f54984 | 7847 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 7848 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7849 | } |
10b3939b DJ |
7850 | |
7851 | item->per_cu->queued = 0; | |
7852 | next_item = item->next; | |
7853 | xfree (item); | |
7854 | } | |
7855 | ||
7856 | dwarf2_queue_tail = NULL; | |
45cfd468 | 7857 | |
b4f54984 | 7858 | if (dwarf_read_debug) |
45cfd468 DE |
7859 | { |
7860 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7861 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7862 | } |
10b3939b DJ |
7863 | } |
7864 | ||
7865 | /* Free all allocated queue entries. This function only releases anything if | |
7866 | an error was thrown; if the queue was processed then it would have been | |
7867 | freed as we went along. */ | |
7868 | ||
7869 | static void | |
7870 | dwarf2_release_queue (void *dummy) | |
7871 | { | |
7872 | struct dwarf2_queue_item *item, *last; | |
7873 | ||
7874 | item = dwarf2_queue; | |
7875 | while (item) | |
7876 | { | |
7877 | /* Anything still marked queued is likely to be in an | |
7878 | inconsistent state, so discard it. */ | |
7879 | if (item->per_cu->queued) | |
7880 | { | |
7881 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7882 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7883 | item->per_cu->queued = 0; |
7884 | } | |
7885 | ||
7886 | last = item; | |
7887 | item = item->next; | |
7888 | xfree (last); | |
7889 | } | |
7890 | ||
7891 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7892 | } | |
7893 | ||
7894 | /* Read in full symbols for PST, and anything it depends on. */ | |
7895 | ||
c906108c | 7896 | static void |
fba45db2 | 7897 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7898 | { |
10b3939b | 7899 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7900 | int i; |
7901 | ||
95554aad TT |
7902 | if (pst->readin) |
7903 | return; | |
7904 | ||
aaa75496 | 7905 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7906 | if (!pst->dependencies[i]->readin |
7907 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7908 | { |
7909 | /* Inform about additional files that need to be read in. */ | |
7910 | if (info_verbose) | |
7911 | { | |
a3f17187 | 7912 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7913 | fputs_filtered (" ", gdb_stdout); |
7914 | wrap_here (""); | |
7915 | fputs_filtered ("and ", gdb_stdout); | |
7916 | wrap_here (""); | |
7917 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7918 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7919 | gdb_flush (gdb_stdout); |
7920 | } | |
7921 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7922 | } | |
7923 | ||
9a3c8263 | 7924 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
7925 | |
7926 | if (per_cu == NULL) | |
aaa75496 JB |
7927 | { |
7928 | /* It's an include file, no symbols to read for it. | |
7929 | Everything is in the parent symtab. */ | |
7930 | pst->readin = 1; | |
7931 | return; | |
7932 | } | |
c906108c | 7933 | |
a0f42c21 | 7934 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7935 | } |
7936 | ||
dee91e82 DE |
7937 | /* Trivial hash function for die_info: the hash value of a DIE |
7938 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7939 | |
dee91e82 DE |
7940 | static hashval_t |
7941 | die_hash (const void *item) | |
10b3939b | 7942 | { |
9a3c8263 | 7943 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 7944 | |
9c541725 | 7945 | return to_underlying (die->sect_off); |
dee91e82 | 7946 | } |
63d06c5c | 7947 | |
dee91e82 DE |
7948 | /* Trivial comparison function for die_info structures: two DIEs |
7949 | are equal if they have the same offset. */ | |
98bfdba5 | 7950 | |
dee91e82 DE |
7951 | static int |
7952 | die_eq (const void *item_lhs, const void *item_rhs) | |
7953 | { | |
9a3c8263 SM |
7954 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
7955 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 7956 | |
9c541725 | 7957 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 7958 | } |
c906108c | 7959 | |
dee91e82 DE |
7960 | /* die_reader_func for load_full_comp_unit. |
7961 | This is identical to read_signatured_type_reader, | |
7962 | but is kept separate for now. */ | |
c906108c | 7963 | |
dee91e82 DE |
7964 | static void |
7965 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7966 | const gdb_byte *info_ptr, |
dee91e82 DE |
7967 | struct die_info *comp_unit_die, |
7968 | int has_children, | |
7969 | void *data) | |
7970 | { | |
7971 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 7972 | enum language *language_ptr = (enum language *) data; |
6caca83c | 7973 | |
dee91e82 DE |
7974 | gdb_assert (cu->die_hash == NULL); |
7975 | cu->die_hash = | |
7976 | htab_create_alloc_ex (cu->header.length / 12, | |
7977 | die_hash, | |
7978 | die_eq, | |
7979 | NULL, | |
7980 | &cu->comp_unit_obstack, | |
7981 | hashtab_obstack_allocate, | |
7982 | dummy_obstack_deallocate); | |
e142c38c | 7983 | |
dee91e82 DE |
7984 | if (has_children) |
7985 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7986 | &info_ptr, comp_unit_die); | |
7987 | cu->dies = comp_unit_die; | |
7988 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7989 | |
7990 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7991 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7992 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7993 | or we won't be able to build types correctly. |
7994 | Similarly, if we do not read the producer, we can not apply | |
7995 | producer-specific interpretation. */ | |
95554aad | 7996 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7997 | } |
10b3939b | 7998 | |
dee91e82 | 7999 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 8000 | |
dee91e82 | 8001 | static void |
95554aad TT |
8002 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8003 | enum language pretend_language) | |
dee91e82 | 8004 | { |
3019eac3 | 8005 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 8006 | |
f4dc4d17 DE |
8007 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
8008 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
8009 | } |
8010 | ||
3da10d80 KS |
8011 | /* Add a DIE to the delayed physname list. */ |
8012 | ||
8013 | static void | |
8014 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8015 | const char *name, struct die_info *die, | |
8016 | struct dwarf2_cu *cu) | |
8017 | { | |
8018 | struct delayed_method_info mi; | |
8019 | mi.type = type; | |
8020 | mi.fnfield_index = fnfield_index; | |
8021 | mi.index = index; | |
8022 | mi.name = name; | |
8023 | mi.die = die; | |
8024 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
8025 | } | |
8026 | ||
8027 | /* A cleanup for freeing the delayed method list. */ | |
8028 | ||
8029 | static void | |
8030 | free_delayed_list (void *ptr) | |
8031 | { | |
8032 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
8033 | if (cu->method_list != NULL) | |
8034 | { | |
8035 | VEC_free (delayed_method_info, cu->method_list); | |
8036 | cu->method_list = NULL; | |
8037 | } | |
8038 | } | |
8039 | ||
3693fdb3 PA |
8040 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8041 | "const" / "volatile". If so, decrements LEN by the length of the | |
8042 | modifier and return true. Otherwise return false. */ | |
8043 | ||
8044 | template<size_t N> | |
8045 | static bool | |
8046 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8047 | { | |
8048 | size_t mod_len = sizeof (mod) - 1; | |
8049 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8050 | { | |
8051 | len -= mod_len; | |
8052 | return true; | |
8053 | } | |
8054 | return false; | |
8055 | } | |
8056 | ||
3da10d80 KS |
8057 | /* Compute the physnames of any methods on the CU's method list. |
8058 | ||
8059 | The computation of method physnames is delayed in order to avoid the | |
8060 | (bad) condition that one of the method's formal parameters is of an as yet | |
8061 | incomplete type. */ | |
8062 | ||
8063 | static void | |
8064 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8065 | { | |
8066 | int i; | |
8067 | struct delayed_method_info *mi; | |
3693fdb3 PA |
8068 | |
8069 | /* Only C++ delays computing physnames. */ | |
8070 | if (VEC_empty (delayed_method_info, cu->method_list)) | |
8071 | return; | |
8072 | gdb_assert (cu->language == language_cplus); | |
8073 | ||
3da10d80 KS |
8074 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) |
8075 | { | |
1d06ead6 | 8076 | const char *physname; |
3da10d80 KS |
8077 | struct fn_fieldlist *fn_flp |
8078 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 8079 | physname = dwarf2_physname (mi->name, mi->die, cu); |
005e54bb DE |
8080 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi->index) |
8081 | = physname ? physname : ""; | |
3693fdb3 PA |
8082 | |
8083 | /* Since there's no tag to indicate whether a method is a | |
8084 | const/volatile overload, extract that information out of the | |
8085 | demangled name. */ | |
8086 | if (physname != NULL) | |
8087 | { | |
8088 | size_t len = strlen (physname); | |
8089 | ||
8090 | while (1) | |
8091 | { | |
8092 | if (physname[len] == ')') /* shortcut */ | |
8093 | break; | |
8094 | else if (check_modifier (physname, len, " const")) | |
8095 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi->index) = 1; | |
8096 | else if (check_modifier (physname, len, " volatile")) | |
8097 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi->index) = 1; | |
8098 | else | |
8099 | break; | |
8100 | } | |
8101 | } | |
3da10d80 KS |
8102 | } |
8103 | } | |
8104 | ||
a766d390 DE |
8105 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8106 | and it's not clear if/how imported objects will appear. | |
8107 | To keep Go support simple until that's worked out, | |
8108 | go back through what we've read and create something usable. | |
8109 | We could do this while processing each DIE, and feels kinda cleaner, | |
8110 | but that way is more invasive. | |
8111 | This is to, for example, allow the user to type "p var" or "b main" | |
8112 | without having to specify the package name, and allow lookups | |
8113 | of module.object to work in contexts that use the expression | |
8114 | parser. */ | |
8115 | ||
8116 | static void | |
8117 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8118 | { | |
8119 | char *package_name = NULL; | |
8120 | struct pending *list; | |
8121 | int i; | |
8122 | ||
8123 | for (list = global_symbols; list != NULL; list = list->next) | |
8124 | { | |
8125 | for (i = 0; i < list->nsyms; ++i) | |
8126 | { | |
8127 | struct symbol *sym = list->symbol[i]; | |
8128 | ||
8129 | if (SYMBOL_LANGUAGE (sym) == language_go | |
8130 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
8131 | { | |
8132 | char *this_package_name = go_symbol_package_name (sym); | |
8133 | ||
8134 | if (this_package_name == NULL) | |
8135 | continue; | |
8136 | if (package_name == NULL) | |
8137 | package_name = this_package_name; | |
8138 | else | |
8139 | { | |
8140 | if (strcmp (package_name, this_package_name) != 0) | |
8141 | complaint (&symfile_complaints, | |
8142 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
08be3fe3 DE |
8143 | (symbol_symtab (sym) != NULL |
8144 | ? symtab_to_filename_for_display | |
8145 | (symbol_symtab (sym)) | |
4262abfb | 8146 | : objfile_name (cu->objfile)), |
a766d390 DE |
8147 | this_package_name, package_name); |
8148 | xfree (this_package_name); | |
8149 | } | |
8150 | } | |
8151 | } | |
8152 | } | |
8153 | ||
8154 | if (package_name != NULL) | |
8155 | { | |
8156 | struct objfile *objfile = cu->objfile; | |
34a68019 | 8157 | const char *saved_package_name |
224c3ddb SM |
8158 | = (const char *) obstack_copy0 (&objfile->per_bfd->storage_obstack, |
8159 | package_name, | |
8160 | strlen (package_name)); | |
19f392bc UW |
8161 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8162 | saved_package_name); | |
a766d390 DE |
8163 | struct symbol *sym; |
8164 | ||
8165 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
8166 | ||
e623cf5d | 8167 | sym = allocate_symbol (objfile); |
f85f34ed | 8168 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
8169 | SYMBOL_SET_NAMES (sym, saved_package_name, |
8170 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
8171 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8172 | e.g., "main" finds the "main" module and not C's main(). */ | |
8173 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8174 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8175 | SYMBOL_TYPE (sym) = type; |
8176 | ||
8177 | add_symbol_to_list (sym, &global_symbols); | |
8178 | ||
8179 | xfree (package_name); | |
8180 | } | |
8181 | } | |
8182 | ||
95554aad TT |
8183 | /* Return the symtab for PER_CU. This works properly regardless of |
8184 | whether we're using the index or psymtabs. */ | |
8185 | ||
43f3e411 DE |
8186 | static struct compunit_symtab * |
8187 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad TT |
8188 | { |
8189 | return (dwarf2_per_objfile->using_index | |
43f3e411 DE |
8190 | ? per_cu->v.quick->compunit_symtab |
8191 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
8192 | } |
8193 | ||
8194 | /* A helper function for computing the list of all symbol tables | |
8195 | included by PER_CU. */ | |
8196 | ||
8197 | static void | |
43f3e411 | 8198 | recursively_compute_inclusions (VEC (compunit_symtab_ptr) **result, |
ec94af83 | 8199 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 8200 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 8201 | struct compunit_symtab *immediate_parent) |
95554aad TT |
8202 | { |
8203 | void **slot; | |
8204 | int ix; | |
43f3e411 | 8205 | struct compunit_symtab *cust; |
95554aad TT |
8206 | struct dwarf2_per_cu_data *iter; |
8207 | ||
8208 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
8209 | if (*slot != NULL) | |
8210 | { | |
8211 | /* This inclusion and its children have been processed. */ | |
8212 | return; | |
8213 | } | |
8214 | ||
8215 | *slot = per_cu; | |
8216 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
8217 | cust = get_compunit_symtab (per_cu); |
8218 | if (cust != NULL) | |
ec94af83 DE |
8219 | { |
8220 | /* If this is a type unit only add its symbol table if we haven't | |
8221 | seen it yet (type unit per_cu's can share symtabs). */ | |
8222 | if (per_cu->is_debug_types) | |
8223 | { | |
43f3e411 | 8224 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
8225 | if (*slot == NULL) |
8226 | { | |
43f3e411 DE |
8227 | *slot = cust; |
8228 | VEC_safe_push (compunit_symtab_ptr, *result, cust); | |
8229 | if (cust->user == NULL) | |
8230 | cust->user = immediate_parent; | |
ec94af83 DE |
8231 | } |
8232 | } | |
8233 | else | |
f9125b6c | 8234 | { |
43f3e411 DE |
8235 | VEC_safe_push (compunit_symtab_ptr, *result, cust); |
8236 | if (cust->user == NULL) | |
8237 | cust->user = immediate_parent; | |
f9125b6c | 8238 | } |
ec94af83 | 8239 | } |
95554aad TT |
8240 | |
8241 | for (ix = 0; | |
796a7ff8 | 8242 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 8243 | ++ix) |
ec94af83 DE |
8244 | { |
8245 | recursively_compute_inclusions (result, all_children, | |
43f3e411 | 8246 | all_type_symtabs, iter, cust); |
ec94af83 | 8247 | } |
95554aad TT |
8248 | } |
8249 | ||
43f3e411 | 8250 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
8251 | PER_CU. */ |
8252 | ||
8253 | static void | |
43f3e411 | 8254 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 8255 | { |
f4dc4d17 DE |
8256 | gdb_assert (! per_cu->is_debug_types); |
8257 | ||
796a7ff8 | 8258 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
8259 | { |
8260 | int ix, len; | |
ec94af83 | 8261 | struct dwarf2_per_cu_data *per_cu_iter; |
43f3e411 DE |
8262 | struct compunit_symtab *compunit_symtab_iter; |
8263 | VEC (compunit_symtab_ptr) *result_symtabs = NULL; | |
ec94af83 | 8264 | htab_t all_children, all_type_symtabs; |
43f3e411 | 8265 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
8266 | |
8267 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 8268 | if (cust == NULL) |
95554aad TT |
8269 | return; |
8270 | ||
8271 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
8272 | NULL, xcalloc, xfree); | |
ec94af83 DE |
8273 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
8274 | NULL, xcalloc, xfree); | |
95554aad TT |
8275 | |
8276 | for (ix = 0; | |
796a7ff8 | 8277 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 8278 | ix, per_cu_iter); |
95554aad | 8279 | ++ix) |
ec94af83 DE |
8280 | { |
8281 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c | 8282 | all_type_symtabs, per_cu_iter, |
43f3e411 | 8283 | cust); |
ec94af83 | 8284 | } |
95554aad | 8285 | |
ec94af83 | 8286 | /* Now we have a transitive closure of all the included symtabs. */ |
43f3e411 DE |
8287 | len = VEC_length (compunit_symtab_ptr, result_symtabs); |
8288 | cust->includes | |
8d749320 SM |
8289 | = XOBNEWVEC (&dwarf2_per_objfile->objfile->objfile_obstack, |
8290 | struct compunit_symtab *, len + 1); | |
95554aad | 8291 | for (ix = 0; |
43f3e411 DE |
8292 | VEC_iterate (compunit_symtab_ptr, result_symtabs, ix, |
8293 | compunit_symtab_iter); | |
95554aad | 8294 | ++ix) |
43f3e411 DE |
8295 | cust->includes[ix] = compunit_symtab_iter; |
8296 | cust->includes[len] = NULL; | |
95554aad | 8297 | |
43f3e411 | 8298 | VEC_free (compunit_symtab_ptr, result_symtabs); |
95554aad | 8299 | htab_delete (all_children); |
ec94af83 | 8300 | htab_delete (all_type_symtabs); |
95554aad TT |
8301 | } |
8302 | } | |
8303 | ||
8304 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
8305 | read. */ | |
8306 | ||
8307 | static void | |
8308 | process_cu_includes (void) | |
8309 | { | |
8310 | int ix; | |
8311 | struct dwarf2_per_cu_data *iter; | |
8312 | ||
8313 | for (ix = 0; | |
8314 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
8315 | ix, iter); | |
8316 | ++ix) | |
f4dc4d17 DE |
8317 | { |
8318 | if (! iter->is_debug_types) | |
43f3e411 | 8319 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 8320 | } |
95554aad TT |
8321 | |
8322 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
8323 | } | |
8324 | ||
9cdd5dbd | 8325 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
8326 | already been loaded into memory. */ |
8327 | ||
8328 | static void | |
95554aad TT |
8329 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8330 | enum language pretend_language) | |
10b3939b | 8331 | { |
10b3939b | 8332 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 8333 | struct objfile *objfile = per_cu->objfile; |
3e29f34a | 8334 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 8335 | CORE_ADDR lowpc, highpc; |
43f3e411 | 8336 | struct compunit_symtab *cust; |
3da10d80 | 8337 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 8338 | CORE_ADDR baseaddr; |
4359dff1 | 8339 | struct block *static_block; |
3e29f34a | 8340 | CORE_ADDR addr; |
10b3939b DJ |
8341 | |
8342 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
8343 | ||
10b3939b DJ |
8344 | buildsym_init (); |
8345 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 8346 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
8347 | |
8348 | cu->list_in_scope = &file_symbols; | |
c906108c | 8349 | |
95554aad TT |
8350 | cu->language = pretend_language; |
8351 | cu->language_defn = language_def (cu->language); | |
8352 | ||
c906108c | 8353 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 8354 | process_die (cu->dies, cu); |
c906108c | 8355 | |
a766d390 DE |
8356 | /* For now fudge the Go package. */ |
8357 | if (cu->language == language_go) | |
8358 | fixup_go_packaging (cu); | |
8359 | ||
3da10d80 KS |
8360 | /* Now that we have processed all the DIEs in the CU, all the types |
8361 | should be complete, and it should now be safe to compute all of the | |
8362 | physnames. */ | |
8363 | compute_delayed_physnames (cu); | |
8364 | do_cleanups (delayed_list_cleanup); | |
8365 | ||
fae299cd DC |
8366 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
8367 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
8368 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 8369 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 8370 | |
3e29f34a MR |
8371 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
8372 | static_block = end_symtab_get_static_block (addr, 0, 1); | |
4359dff1 JK |
8373 | |
8374 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
8375 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
8376 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
8377 | addrmap to help ensure it has an accurate map of pc values belonging to | |
8378 | this comp unit. */ | |
8379 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
8380 | ||
43f3e411 DE |
8381 | cust = end_symtab_from_static_block (static_block, |
8382 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 8383 | |
43f3e411 | 8384 | if (cust != NULL) |
c906108c | 8385 | { |
df15bd07 | 8386 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 8387 | |
8be455d7 JK |
8388 | /* Set symtab language to language from DW_AT_language. If the |
8389 | compilation is from a C file generated by language preprocessors, do | |
8390 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 8391 | if (!(cu->language == language_c |
40e3ad0e | 8392 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 8393 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
8394 | |
8395 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
8396 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
8397 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
8398 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
8399 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
8400 | |
8401 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
8402 | needed, it would be wrong due to missing DW_AT_producer there. | |
8403 | ||
8404 | Still one can confuse GDB by using non-standard GCC compilation | |
8405 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
8406 | */ | |
ab260dad | 8407 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 8408 | cust->locations_valid = 1; |
e0d00bc7 JK |
8409 | |
8410 | if (gcc_4_minor >= 5) | |
43f3e411 | 8411 | cust->epilogue_unwind_valid = 1; |
96408a79 | 8412 | |
43f3e411 | 8413 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 8414 | } |
9291a0cd TT |
8415 | |
8416 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8417 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
8418 | else |
8419 | { | |
8420 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8421 | pst->compunit_symtab = cust; |
9291a0cd TT |
8422 | pst->readin = 1; |
8423 | } | |
c906108c | 8424 | |
95554aad TT |
8425 | /* Push it for inclusion processing later. */ |
8426 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
8427 | ||
c906108c | 8428 | do_cleanups (back_to); |
f4dc4d17 | 8429 | } |
45cfd468 | 8430 | |
f4dc4d17 DE |
8431 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
8432 | already been loaded into memory. */ | |
8433 | ||
8434 | static void | |
8435 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
8436 | enum language pretend_language) | |
8437 | { | |
8438 | struct dwarf2_cu *cu = per_cu->cu; | |
8439 | struct objfile *objfile = per_cu->objfile; | |
43f3e411 | 8440 | struct compunit_symtab *cust; |
f4dc4d17 | 8441 | struct cleanup *back_to, *delayed_list_cleanup; |
0186c6a7 DE |
8442 | struct signatured_type *sig_type; |
8443 | ||
8444 | gdb_assert (per_cu->is_debug_types); | |
8445 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8446 | |
8447 | buildsym_init (); | |
8448 | back_to = make_cleanup (really_free_pendings, NULL); | |
8449 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
8450 | ||
8451 | cu->list_in_scope = &file_symbols; | |
8452 | ||
8453 | cu->language = pretend_language; | |
8454 | cu->language_defn = language_def (cu->language); | |
8455 | ||
8456 | /* The symbol tables are set up in read_type_unit_scope. */ | |
8457 | process_die (cu->dies, cu); | |
8458 | ||
8459 | /* For now fudge the Go package. */ | |
8460 | if (cu->language == language_go) | |
8461 | fixup_go_packaging (cu); | |
8462 | ||
8463 | /* Now that we have processed all the DIEs in the CU, all the types | |
8464 | should be complete, and it should now be safe to compute all of the | |
8465 | physnames. */ | |
8466 | compute_delayed_physnames (cu); | |
8467 | do_cleanups (delayed_list_cleanup); | |
8468 | ||
8469 | /* TUs share symbol tables. | |
8470 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
8471 | of it with end_expandable_symtab. Otherwise, complete the addition of |
8472 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 8473 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 8474 | { |
43f3e411 DE |
8475 | cust = end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); |
8476 | sig_type->type_unit_group->compunit_symtab = cust; | |
f4dc4d17 | 8477 | |
43f3e411 | 8478 | if (cust != NULL) |
f4dc4d17 DE |
8479 | { |
8480 | /* Set symtab language to language from DW_AT_language. If the | |
8481 | compilation is from a C file generated by language preprocessors, | |
8482 | do not set the language if it was already deduced by | |
8483 | start_subfile. */ | |
43f3e411 DE |
8484 | if (!(cu->language == language_c |
8485 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
8486 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
8487 | } |
8488 | } | |
8489 | else | |
8490 | { | |
0ab9ce85 | 8491 | augment_type_symtab (); |
43f3e411 | 8492 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
8493 | } |
8494 | ||
8495 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 8496 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
8497 | else |
8498 | { | |
8499 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 8500 | pst->compunit_symtab = cust; |
f4dc4d17 | 8501 | pst->readin = 1; |
45cfd468 | 8502 | } |
f4dc4d17 DE |
8503 | |
8504 | do_cleanups (back_to); | |
c906108c SS |
8505 | } |
8506 | ||
95554aad TT |
8507 | /* Process an imported unit DIE. */ |
8508 | ||
8509 | static void | |
8510 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
8511 | { | |
8512 | struct attribute *attr; | |
8513 | ||
f4dc4d17 DE |
8514 | /* For now we don't handle imported units in type units. */ |
8515 | if (cu->per_cu->is_debug_types) | |
8516 | { | |
8517 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8518 | " supported in type units [in module %s]"), | |
4262abfb | 8519 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
8520 | } |
8521 | ||
95554aad TT |
8522 | attr = dwarf2_attr (die, DW_AT_import, cu); |
8523 | if (attr != NULL) | |
8524 | { | |
9c541725 PA |
8525 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
8526 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
8527 | dwarf2_per_cu_data *per_cu | |
8528 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, cu->objfile); | |
95554aad | 8529 | |
69d751e3 | 8530 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
8531 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
8532 | load_full_comp_unit (per_cu, cu->language); | |
8533 | ||
796a7ff8 | 8534 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
8535 | per_cu); |
8536 | } | |
8537 | } | |
8538 | ||
4c8aa72d PA |
8539 | /* RAII object that represents a process_die scope: i.e., |
8540 | starts/finishes processing a DIE. */ | |
8541 | class process_die_scope | |
adde2bff | 8542 | { |
4c8aa72d PA |
8543 | public: |
8544 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
8545 | : m_die (die), m_cu (cu) | |
8546 | { | |
8547 | /* We should only be processing DIEs not already in process. */ | |
8548 | gdb_assert (!m_die->in_process); | |
8549 | m_die->in_process = true; | |
8550 | } | |
8c3cb9fa | 8551 | |
4c8aa72d PA |
8552 | ~process_die_scope () |
8553 | { | |
8554 | m_die->in_process = false; | |
8555 | ||
8556 | /* If we're done processing the DIE for the CU that owns the line | |
8557 | header, we don't need the line header anymore. */ | |
8558 | if (m_cu->line_header_die_owner == m_die) | |
8559 | { | |
8560 | delete m_cu->line_header; | |
8561 | m_cu->line_header = NULL; | |
8562 | m_cu->line_header_die_owner = NULL; | |
8563 | } | |
8564 | } | |
8565 | ||
8566 | private: | |
8567 | die_info *m_die; | |
8568 | dwarf2_cu *m_cu; | |
8569 | }; | |
adde2bff | 8570 | |
c906108c SS |
8571 | /* Process a die and its children. */ |
8572 | ||
8573 | static void | |
e7c27a73 | 8574 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8575 | { |
4c8aa72d | 8576 | process_die_scope scope (die, cu); |
adde2bff | 8577 | |
c906108c SS |
8578 | switch (die->tag) |
8579 | { | |
8580 | case DW_TAG_padding: | |
8581 | break; | |
8582 | case DW_TAG_compile_unit: | |
95554aad | 8583 | case DW_TAG_partial_unit: |
e7c27a73 | 8584 | read_file_scope (die, cu); |
c906108c | 8585 | break; |
348e048f DE |
8586 | case DW_TAG_type_unit: |
8587 | read_type_unit_scope (die, cu); | |
8588 | break; | |
c906108c | 8589 | case DW_TAG_subprogram: |
c906108c | 8590 | case DW_TAG_inlined_subroutine: |
edb3359d | 8591 | read_func_scope (die, cu); |
c906108c SS |
8592 | break; |
8593 | case DW_TAG_lexical_block: | |
14898363 L |
8594 | case DW_TAG_try_block: |
8595 | case DW_TAG_catch_block: | |
e7c27a73 | 8596 | read_lexical_block_scope (die, cu); |
c906108c | 8597 | break; |
216f72a1 | 8598 | case DW_TAG_call_site: |
96408a79 SA |
8599 | case DW_TAG_GNU_call_site: |
8600 | read_call_site_scope (die, cu); | |
8601 | break; | |
c906108c | 8602 | case DW_TAG_class_type: |
680b30c7 | 8603 | case DW_TAG_interface_type: |
c906108c SS |
8604 | case DW_TAG_structure_type: |
8605 | case DW_TAG_union_type: | |
134d01f1 | 8606 | process_structure_scope (die, cu); |
c906108c SS |
8607 | break; |
8608 | case DW_TAG_enumeration_type: | |
134d01f1 | 8609 | process_enumeration_scope (die, cu); |
c906108c | 8610 | break; |
134d01f1 | 8611 | |
f792889a DJ |
8612 | /* These dies have a type, but processing them does not create |
8613 | a symbol or recurse to process the children. Therefore we can | |
8614 | read them on-demand through read_type_die. */ | |
c906108c | 8615 | case DW_TAG_subroutine_type: |
72019c9c | 8616 | case DW_TAG_set_type: |
c906108c | 8617 | case DW_TAG_array_type: |
c906108c | 8618 | case DW_TAG_pointer_type: |
c906108c | 8619 | case DW_TAG_ptr_to_member_type: |
c906108c | 8620 | case DW_TAG_reference_type: |
4297a3f0 | 8621 | case DW_TAG_rvalue_reference_type: |
c906108c | 8622 | case DW_TAG_string_type: |
c906108c | 8623 | break; |
134d01f1 | 8624 | |
c906108c | 8625 | case DW_TAG_base_type: |
a02abb62 | 8626 | case DW_TAG_subrange_type: |
cb249c71 | 8627 | case DW_TAG_typedef: |
134d01f1 DJ |
8628 | /* Add a typedef symbol for the type definition, if it has a |
8629 | DW_AT_name. */ | |
f792889a | 8630 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 8631 | break; |
c906108c | 8632 | case DW_TAG_common_block: |
e7c27a73 | 8633 | read_common_block (die, cu); |
c906108c SS |
8634 | break; |
8635 | case DW_TAG_common_inclusion: | |
8636 | break; | |
d9fa45fe | 8637 | case DW_TAG_namespace: |
4d4ec4e5 | 8638 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 8639 | read_namespace (die, cu); |
d9fa45fe | 8640 | break; |
5d7cb8df | 8641 | case DW_TAG_module: |
4d4ec4e5 | 8642 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
8643 | read_module (die, cu); |
8644 | break; | |
d9fa45fe | 8645 | case DW_TAG_imported_declaration: |
74921315 KS |
8646 | cu->processing_has_namespace_info = 1; |
8647 | if (read_namespace_alias (die, cu)) | |
8648 | break; | |
8649 | /* The declaration is not a global namespace alias: fall through. */ | |
d9fa45fe | 8650 | case DW_TAG_imported_module: |
4d4ec4e5 | 8651 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
8652 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
8653 | || cu->language != language_fortran)) | |
8654 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
8655 | dwarf_tag_name (die->tag)); | |
8656 | read_import_statement (die, cu); | |
d9fa45fe | 8657 | break; |
95554aad TT |
8658 | |
8659 | case DW_TAG_imported_unit: | |
8660 | process_imported_unit_die (die, cu); | |
8661 | break; | |
8662 | ||
c906108c | 8663 | default: |
e7c27a73 | 8664 | new_symbol (die, NULL, cu); |
c906108c SS |
8665 | break; |
8666 | } | |
8667 | } | |
ca69b9e6 DE |
8668 | \f |
8669 | /* DWARF name computation. */ | |
c906108c | 8670 | |
94af9270 KS |
8671 | /* A helper function for dwarf2_compute_name which determines whether DIE |
8672 | needs to have the name of the scope prepended to the name listed in the | |
8673 | die. */ | |
8674 | ||
8675 | static int | |
8676 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
8677 | { | |
1c809c68 TT |
8678 | struct attribute *attr; |
8679 | ||
94af9270 KS |
8680 | switch (die->tag) |
8681 | { | |
8682 | case DW_TAG_namespace: | |
8683 | case DW_TAG_typedef: | |
8684 | case DW_TAG_class_type: | |
8685 | case DW_TAG_interface_type: | |
8686 | case DW_TAG_structure_type: | |
8687 | case DW_TAG_union_type: | |
8688 | case DW_TAG_enumeration_type: | |
8689 | case DW_TAG_enumerator: | |
8690 | case DW_TAG_subprogram: | |
08a76f8a | 8691 | case DW_TAG_inlined_subroutine: |
94af9270 | 8692 | case DW_TAG_member: |
74921315 | 8693 | case DW_TAG_imported_declaration: |
94af9270 KS |
8694 | return 1; |
8695 | ||
8696 | case DW_TAG_variable: | |
c2b0a229 | 8697 | case DW_TAG_constant: |
94af9270 KS |
8698 | /* We only need to prefix "globally" visible variables. These include |
8699 | any variable marked with DW_AT_external or any variable that | |
8700 | lives in a namespace. [Variables in anonymous namespaces | |
8701 | require prefixing, but they are not DW_AT_external.] */ | |
8702 | ||
8703 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
8704 | { | |
8705 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 8706 | |
94af9270 KS |
8707 | return die_needs_namespace (die_specification (die, &spec_cu), |
8708 | spec_cu); | |
8709 | } | |
8710 | ||
1c809c68 | 8711 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
8712 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
8713 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
8714 | return 0; |
8715 | /* A variable in a lexical block of some kind does not need a | |
8716 | namespace, even though in C++ such variables may be external | |
8717 | and have a mangled name. */ | |
8718 | if (die->parent->tag == DW_TAG_lexical_block | |
8719 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
8720 | || die->parent->tag == DW_TAG_catch_block |
8721 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
8722 | return 0; |
8723 | return 1; | |
94af9270 KS |
8724 | |
8725 | default: | |
8726 | return 0; | |
8727 | } | |
8728 | } | |
8729 | ||
73b9be8b KS |
8730 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
8731 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
8732 | defined for the given DIE. */ | |
8733 | ||
8734 | static struct attribute * | |
8735 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
8736 | { | |
8737 | struct attribute *attr; | |
8738 | ||
8739 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8740 | if (attr == NULL) | |
8741 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8742 | ||
8743 | return attr; | |
8744 | } | |
8745 | ||
8746 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
8747 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
8748 | defined for the given DIE. */ | |
8749 | ||
8750 | static const char * | |
8751 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
8752 | { | |
8753 | const char *linkage_name; | |
8754 | ||
8755 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
8756 | if (linkage_name == NULL) | |
8757 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8758 | ||
8759 | return linkage_name; | |
8760 | } | |
8761 | ||
94af9270 | 8762 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 8763 | compute the physname for the object, which include a method's: |
9c37b5ae | 8764 | - formal parameters (C++), |
a766d390 | 8765 | - receiver type (Go), |
a766d390 DE |
8766 | |
8767 | The term "physname" is a bit confusing. | |
8768 | For C++, for example, it is the demangled name. | |
8769 | For Go, for example, it's the mangled name. | |
94af9270 | 8770 | |
af6b7be1 JB |
8771 | For Ada, return the DIE's linkage name rather than the fully qualified |
8772 | name. PHYSNAME is ignored.. | |
8773 | ||
94af9270 KS |
8774 | The result is allocated on the objfile_obstack and canonicalized. */ |
8775 | ||
8776 | static const char * | |
15d034d0 TT |
8777 | dwarf2_compute_name (const char *name, |
8778 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
8779 | int physname) |
8780 | { | |
bb5ed363 DE |
8781 | struct objfile *objfile = cu->objfile; |
8782 | ||
94af9270 KS |
8783 | if (name == NULL) |
8784 | name = dwarf2_name (die, cu); | |
8785 | ||
2ee7123e DE |
8786 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
8787 | but otherwise compute it by typename_concat inside GDB. | |
8788 | FIXME: Actually this is not really true, or at least not always true. | |
8789 | It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle | |
8790 | Fortran names because there is no mangling standard. So new_symbol_full | |
8791 | will set the demangled name to the result of dwarf2_full_name, and it is | |
8792 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
8793 | if (cu->language == language_ada |
8794 | || (cu->language == language_fortran && physname)) | |
8795 | { | |
8796 | /* For Ada unit, we prefer the linkage name over the name, as | |
8797 | the former contains the exported name, which the user expects | |
8798 | to be able to reference. Ideally, we want the user to be able | |
8799 | to reference this entity using either natural or linkage name, | |
8800 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 8801 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 8802 | |
2ee7123e DE |
8803 | if (linkage_name != NULL) |
8804 | return linkage_name; | |
f55ee35c JK |
8805 | } |
8806 | ||
94af9270 KS |
8807 | /* These are the only languages we know how to qualify names in. */ |
8808 | if (name != NULL | |
9c37b5ae | 8809 | && (cu->language == language_cplus |
c44af4eb TT |
8810 | || cu->language == language_fortran || cu->language == language_d |
8811 | || cu->language == language_rust)) | |
94af9270 KS |
8812 | { |
8813 | if (die_needs_namespace (die, cu)) | |
8814 | { | |
8815 | long length; | |
0d5cff50 | 8816 | const char *prefix; |
34a68019 | 8817 | const char *canonical_name = NULL; |
94af9270 | 8818 | |
d7e74731 PA |
8819 | string_file buf; |
8820 | ||
94af9270 | 8821 | prefix = determine_prefix (die, cu); |
94af9270 KS |
8822 | if (*prefix != '\0') |
8823 | { | |
f55ee35c JK |
8824 | char *prefixed_name = typename_concat (NULL, prefix, name, |
8825 | physname, cu); | |
9a619af0 | 8826 | |
d7e74731 | 8827 | buf.puts (prefixed_name); |
94af9270 KS |
8828 | xfree (prefixed_name); |
8829 | } | |
8830 | else | |
d7e74731 | 8831 | buf.puts (name); |
94af9270 | 8832 | |
98bfdba5 PA |
8833 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8834 | as children with DW_TAG_template_type_param or | |
8835 | DW_TAG_value_type_param. If the latter, add them to the name | |
8836 | here. If the name already has template parameters, then | |
8837 | skip this step; some versions of GCC emit both, and | |
8838 | it is more efficient to use the pre-computed name. | |
8839 | ||
8840 | Something to keep in mind about this process: it is very | |
8841 | unlikely, or in some cases downright impossible, to produce | |
8842 | something that will match the mangled name of a function. | |
8843 | If the definition of the function has the same debug info, | |
8844 | we should be able to match up with it anyway. But fallbacks | |
8845 | using the minimal symbol, for instance to find a method | |
8846 | implemented in a stripped copy of libstdc++, will not work. | |
8847 | If we do not have debug info for the definition, we will have to | |
8848 | match them up some other way. | |
8849 | ||
8850 | When we do name matching there is a related problem with function | |
8851 | templates; two instantiated function templates are allowed to | |
8852 | differ only by their return types, which we do not add here. */ | |
8853 | ||
8854 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8855 | { | |
8856 | struct attribute *attr; | |
8857 | struct die_info *child; | |
8858 | int first = 1; | |
8859 | ||
8860 | die->building_fullname = 1; | |
8861 | ||
8862 | for (child = die->child; child != NULL; child = child->sibling) | |
8863 | { | |
8864 | struct type *type; | |
12df843f | 8865 | LONGEST value; |
d521ce57 | 8866 | const gdb_byte *bytes; |
98bfdba5 PA |
8867 | struct dwarf2_locexpr_baton *baton; |
8868 | struct value *v; | |
8869 | ||
8870 | if (child->tag != DW_TAG_template_type_param | |
8871 | && child->tag != DW_TAG_template_value_param) | |
8872 | continue; | |
8873 | ||
8874 | if (first) | |
8875 | { | |
d7e74731 | 8876 | buf.puts ("<"); |
98bfdba5 PA |
8877 | first = 0; |
8878 | } | |
8879 | else | |
d7e74731 | 8880 | buf.puts (", "); |
98bfdba5 PA |
8881 | |
8882 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8883 | if (attr == NULL) | |
8884 | { | |
8885 | complaint (&symfile_complaints, | |
8886 | _("template parameter missing DW_AT_type")); | |
d7e74731 | 8887 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
8888 | continue; |
8889 | } | |
8890 | type = die_type (child, cu); | |
8891 | ||
8892 | if (child->tag == DW_TAG_template_type_param) | |
8893 | { | |
d7e74731 | 8894 | c_print_type (type, "", &buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8895 | continue; |
8896 | } | |
8897 | ||
8898 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8899 | if (attr == NULL) | |
8900 | { | |
8901 | complaint (&symfile_complaints, | |
3e43a32a MS |
8902 | _("template parameter missing " |
8903 | "DW_AT_const_value")); | |
d7e74731 | 8904 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
8905 | continue; |
8906 | } | |
8907 | ||
8908 | dwarf2_const_value_attr (attr, type, name, | |
8909 | &cu->comp_unit_obstack, cu, | |
8910 | &value, &bytes, &baton); | |
8911 | ||
8912 | if (TYPE_NOSIGN (type)) | |
8913 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8914 | changed, this can use value_print instead. */ | |
d7e74731 | 8915 | c_printchar (value, type, &buf); |
98bfdba5 PA |
8916 | else |
8917 | { | |
8918 | struct value_print_options opts; | |
8919 | ||
8920 | if (baton != NULL) | |
8921 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8922 | baton->data, | |
8923 | baton->size, | |
8924 | baton->per_cu); | |
8925 | else if (bytes != NULL) | |
8926 | { | |
8927 | v = allocate_value (type); | |
8928 | memcpy (value_contents_writeable (v), bytes, | |
8929 | TYPE_LENGTH (type)); | |
8930 | } | |
8931 | else | |
8932 | v = value_from_longest (type, value); | |
8933 | ||
3e43a32a MS |
8934 | /* Specify decimal so that we do not depend on |
8935 | the radix. */ | |
98bfdba5 PA |
8936 | get_formatted_print_options (&opts, 'd'); |
8937 | opts.raw = 1; | |
d7e74731 | 8938 | value_print (v, &buf, &opts); |
98bfdba5 PA |
8939 | release_value (v); |
8940 | value_free (v); | |
8941 | } | |
8942 | } | |
8943 | ||
8944 | die->building_fullname = 0; | |
8945 | ||
8946 | if (!first) | |
8947 | { | |
8948 | /* Close the argument list, with a space if necessary | |
8949 | (nested templates). */ | |
d7e74731 PA |
8950 | if (!buf.empty () && buf.string ().back () == '>') |
8951 | buf.puts (" >"); | |
98bfdba5 | 8952 | else |
d7e74731 | 8953 | buf.puts (">"); |
98bfdba5 PA |
8954 | } |
8955 | } | |
8956 | ||
9c37b5ae | 8957 | /* For C++ methods, append formal parameter type |
94af9270 | 8958 | information, if PHYSNAME. */ |
6e70227d | 8959 | |
94af9270 | 8960 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 8961 | && cu->language == language_cplus) |
94af9270 KS |
8962 | { |
8963 | struct type *type = read_type_die (die, cu); | |
8964 | ||
d7e74731 | 8965 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 8966 | &type_print_raw_options); |
94af9270 | 8967 | |
9c37b5ae | 8968 | if (cu->language == language_cplus) |
94af9270 | 8969 | { |
60430eff DJ |
8970 | /* Assume that an artificial first parameter is |
8971 | "this", but do not crash if it is not. RealView | |
8972 | marks unnamed (and thus unused) parameters as | |
8973 | artificial; there is no way to differentiate | |
8974 | the two cases. */ | |
94af9270 KS |
8975 | if (TYPE_NFIELDS (type) > 0 |
8976 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8977 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8978 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8979 | 0)))) | |
d7e74731 | 8980 | buf.puts (" const"); |
94af9270 KS |
8981 | } |
8982 | } | |
8983 | ||
d7e74731 | 8984 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
8985 | |
8986 | if (cu->language == language_cplus) | |
34a68019 | 8987 | canonical_name |
322a8516 | 8988 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
8989 | &objfile->per_bfd->storage_obstack); |
8990 | ||
8991 | /* If we only computed INTERMEDIATE_NAME, or if | |
8992 | INTERMEDIATE_NAME is already canonical, then we need to | |
8993 | copy it to the appropriate obstack. */ | |
322a8516 | 8994 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
224c3ddb SM |
8995 | name = ((const char *) |
8996 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
322a8516 PA |
8997 | intermediate_name.c_str (), |
8998 | intermediate_name.length ())); | |
34a68019 TT |
8999 | else |
9000 | name = canonical_name; | |
94af9270 KS |
9001 | } |
9002 | } | |
9003 | ||
9004 | return name; | |
9005 | } | |
9006 | ||
0114d602 DJ |
9007 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
9008 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 9009 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
9010 | not have a name. NAME may either be from a previous call to |
9011 | dwarf2_name or NULL. | |
9012 | ||
9c37b5ae | 9013 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
9014 | |
9015 | static const char * | |
15d034d0 | 9016 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 9017 | { |
94af9270 KS |
9018 | return dwarf2_compute_name (name, die, cu, 0); |
9019 | } | |
0114d602 | 9020 | |
94af9270 KS |
9021 | /* Construct a physname for the given DIE in CU. NAME may either be |
9022 | from a previous call to dwarf2_name or NULL. The result will be | |
9023 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
9024 | name. | |
0114d602 | 9025 | |
9c37b5ae | 9026 | The output string will be canonicalized (if C++). */ |
0114d602 | 9027 | |
94af9270 | 9028 | static const char * |
15d034d0 | 9029 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 9030 | { |
bb5ed363 | 9031 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
9032 | const char *retval, *mangled = NULL, *canon = NULL; |
9033 | struct cleanup *back_to; | |
9034 | int need_copy = 1; | |
9035 | ||
9036 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
9037 | on its own. */ | |
9038 | if (!die_needs_namespace (die, cu)) | |
9039 | return dwarf2_compute_name (name, die, cu, 1); | |
9040 | ||
9041 | back_to = make_cleanup (null_cleanup, NULL); | |
9042 | ||
73b9be8b | 9043 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 9044 | |
e98c9e7c TT |
9045 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9046 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9047 | if (cu->language == language_rust && mangled != NULL | |
9048 | && strchr (mangled, '{') != NULL) | |
9049 | mangled = NULL; | |
9050 | ||
900e11f9 JK |
9051 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
9052 | has computed. */ | |
7d45c7c3 | 9053 | if (mangled != NULL) |
900e11f9 JK |
9054 | { |
9055 | char *demangled; | |
9056 | ||
900e11f9 JK |
9057 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return |
9058 | type. It is easier for GDB users to search for such functions as | |
9059 | `name(params)' than `long name(params)'. In such case the minimal | |
9060 | symbol names do not match the full symbol names but for template | |
9061 | functions there is never a need to look up their definition from their | |
9062 | declaration so the only disadvantage remains the minimal symbol | |
9063 | variant `long name(params)' does not have the proper inferior type. | |
9064 | */ | |
9065 | ||
a766d390 DE |
9066 | if (cu->language == language_go) |
9067 | { | |
9068 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
9069 | new_symbol_full assumes we return the mangled name. | |
9070 | This just undoes that lie until things are cleaned up. */ | |
9071 | demangled = NULL; | |
9072 | } | |
9073 | else | |
9074 | { | |
8de20a37 | 9075 | demangled = gdb_demangle (mangled, |
9c37b5ae | 9076 | (DMGL_PARAMS | DMGL_ANSI | DMGL_RET_DROP)); |
a766d390 | 9077 | } |
900e11f9 JK |
9078 | if (demangled) |
9079 | { | |
9080 | make_cleanup (xfree, demangled); | |
9081 | canon = demangled; | |
9082 | } | |
9083 | else | |
9084 | { | |
9085 | canon = mangled; | |
9086 | need_copy = 0; | |
9087 | } | |
9088 | } | |
9089 | ||
9090 | if (canon == NULL || check_physname) | |
9091 | { | |
9092 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
9093 | ||
9094 | if (canon != NULL && strcmp (physname, canon) != 0) | |
9095 | { | |
9096 | /* It may not mean a bug in GDB. The compiler could also | |
9097 | compute DW_AT_linkage_name incorrectly. But in such case | |
9098 | GDB would need to be bug-to-bug compatible. */ | |
9099 | ||
9100 | complaint (&symfile_complaints, | |
9101 | _("Computed physname <%s> does not match demangled <%s> " | |
9102 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
9c541725 | 9103 | physname, canon, mangled, to_underlying (die->sect_off), |
4262abfb | 9104 | objfile_name (objfile)); |
900e11f9 JK |
9105 | |
9106 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
9107 | is available here - over computed PHYSNAME. It is safer | |
9108 | against both buggy GDB and buggy compilers. */ | |
9109 | ||
9110 | retval = canon; | |
9111 | } | |
9112 | else | |
9113 | { | |
9114 | retval = physname; | |
9115 | need_copy = 0; | |
9116 | } | |
9117 | } | |
9118 | else | |
9119 | retval = canon; | |
9120 | ||
9121 | if (need_copy) | |
224c3ddb SM |
9122 | retval = ((const char *) |
9123 | obstack_copy0 (&objfile->per_bfd->storage_obstack, | |
9124 | retval, strlen (retval))); | |
900e11f9 JK |
9125 | |
9126 | do_cleanups (back_to); | |
9127 | return retval; | |
0114d602 DJ |
9128 | } |
9129 | ||
74921315 KS |
9130 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
9131 | a new symbol for it. | |
9132 | ||
9133 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
9134 | ||
9135 | static int | |
9136 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
9137 | { | |
9138 | struct attribute *attr; | |
9139 | ||
9140 | /* If the die does not have a name, this is not a namespace | |
9141 | alias. */ | |
9142 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
9143 | if (attr != NULL) | |
9144 | { | |
9145 | int num; | |
9146 | struct die_info *d = die; | |
9147 | struct dwarf2_cu *imported_cu = cu; | |
9148 | ||
9149 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
9150 | keep inspecting DIEs until we hit the underlying import. */ | |
9151 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
9152 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
9153 | { | |
9154 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
9155 | if (attr == NULL) | |
9156 | break; | |
9157 | ||
9158 | d = follow_die_ref (d, attr, &imported_cu); | |
9159 | if (d->tag != DW_TAG_imported_declaration) | |
9160 | break; | |
9161 | } | |
9162 | ||
9163 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
9164 | { | |
9165 | complaint (&symfile_complaints, | |
9166 | _("DIE at 0x%x has too many recursively imported " | |
9c541725 | 9167 | "declarations"), to_underlying (d->sect_off)); |
74921315 KS |
9168 | return 0; |
9169 | } | |
9170 | ||
9171 | if (attr != NULL) | |
9172 | { | |
9173 | struct type *type; | |
9c541725 | 9174 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 9175 | |
9c541725 | 9176 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
9177 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
9178 | { | |
9179 | /* This declaration is a global namespace alias. Add | |
9180 | a symbol for it whose type is the aliased namespace. */ | |
9181 | new_symbol (die, type, cu); | |
9182 | return 1; | |
9183 | } | |
9184 | } | |
9185 | } | |
9186 | ||
9187 | return 0; | |
9188 | } | |
9189 | ||
22cee43f PMR |
9190 | /* Return the using directives repository (global or local?) to use in the |
9191 | current context for LANGUAGE. | |
9192 | ||
9193 | For Ada, imported declarations can materialize renamings, which *may* be | |
9194 | global. However it is impossible (for now?) in DWARF to distinguish | |
9195 | "external" imported declarations and "static" ones. As all imported | |
9196 | declarations seem to be static in all other languages, make them all CU-wide | |
9197 | global only in Ada. */ | |
9198 | ||
9199 | static struct using_direct ** | |
9200 | using_directives (enum language language) | |
9201 | { | |
9202 | if (language == language_ada && context_stack_depth == 0) | |
9203 | return &global_using_directives; | |
9204 | else | |
9205 | return &local_using_directives; | |
9206 | } | |
9207 | ||
27aa8d6a SW |
9208 | /* Read the import statement specified by the given die and record it. */ |
9209 | ||
9210 | static void | |
9211 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
9212 | { | |
bb5ed363 | 9213 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 9214 | struct attribute *import_attr; |
32019081 | 9215 | struct die_info *imported_die, *child_die; |
de4affc9 | 9216 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 9217 | const char *imported_name; |
794684b6 | 9218 | const char *imported_name_prefix; |
13387711 SW |
9219 | const char *canonical_name; |
9220 | const char *import_alias; | |
9221 | const char *imported_declaration = NULL; | |
794684b6 | 9222 | const char *import_prefix; |
eb1e02fd | 9223 | std::vector<const char *> excludes; |
13387711 | 9224 | |
27aa8d6a SW |
9225 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
9226 | if (import_attr == NULL) | |
9227 | { | |
9228 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9229 | dwarf_tag_name (die->tag)); | |
9230 | return; | |
9231 | } | |
9232 | ||
de4affc9 CC |
9233 | imported_cu = cu; |
9234 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
9235 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
9236 | if (imported_name == NULL) |
9237 | { | |
9238 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
9239 | ||
9240 | The import in the following code: | |
9241 | namespace A | |
9242 | { | |
9243 | typedef int B; | |
9244 | } | |
9245 | ||
9246 | int main () | |
9247 | { | |
9248 | using A::B; | |
9249 | B b; | |
9250 | return b; | |
9251 | } | |
9252 | ||
9253 | ... | |
9254 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
9255 | <52> DW_AT_decl_file : 1 | |
9256 | <53> DW_AT_decl_line : 6 | |
9257 | <54> DW_AT_import : <0x75> | |
9258 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
9259 | <59> DW_AT_name : B | |
9260 | <5b> DW_AT_decl_file : 1 | |
9261 | <5c> DW_AT_decl_line : 2 | |
9262 | <5d> DW_AT_type : <0x6e> | |
9263 | ... | |
9264 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
9265 | <76> DW_AT_byte_size : 4 | |
9266 | <77> DW_AT_encoding : 5 (signed) | |
9267 | ||
9268 | imports the wrong die ( 0x75 instead of 0x58 ). | |
9269 | This case will be ignored until the gcc bug is fixed. */ | |
9270 | return; | |
9271 | } | |
9272 | ||
82856980 SW |
9273 | /* Figure out the local name after import. */ |
9274 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 9275 | |
794684b6 SW |
9276 | /* Figure out where the statement is being imported to. */ |
9277 | import_prefix = determine_prefix (die, cu); | |
9278 | ||
9279 | /* Figure out what the scope of the imported die is and prepend it | |
9280 | to the name of the imported die. */ | |
de4affc9 | 9281 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 9282 | |
f55ee35c JK |
9283 | if (imported_die->tag != DW_TAG_namespace |
9284 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 9285 | { |
13387711 SW |
9286 | imported_declaration = imported_name; |
9287 | canonical_name = imported_name_prefix; | |
794684b6 | 9288 | } |
13387711 | 9289 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 9290 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
9291 | imported_name_prefix, |
9292 | (cu->language == language_d ? "." : "::"), | |
9293 | imported_name, (char *) NULL); | |
13387711 SW |
9294 | else |
9295 | canonical_name = imported_name; | |
794684b6 | 9296 | |
32019081 JK |
9297 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
9298 | for (child_die = die->child; child_die && child_die->tag; | |
9299 | child_die = sibling_die (child_die)) | |
9300 | { | |
9301 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
9302 | represented by an imported module entry with an import attribute | |
9303 | referring to the module and owned entries corresponding to those | |
9304 | entities that are renamed as part of being imported. */ | |
9305 | ||
9306 | if (child_die->tag != DW_TAG_imported_declaration) | |
9307 | { | |
9308 | complaint (&symfile_complaints, | |
9309 | _("child DW_TAG_imported_declaration expected " | |
9310 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 9311 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9312 | continue; |
9313 | } | |
9314 | ||
9315 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
9316 | if (import_attr == NULL) | |
9317 | { | |
9318 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
9319 | dwarf_tag_name (child_die->tag)); | |
9320 | continue; | |
9321 | } | |
9322 | ||
9323 | imported_cu = cu; | |
9324 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
9325 | &imported_cu); | |
9326 | imported_name = dwarf2_name (imported_die, imported_cu); | |
9327 | if (imported_name == NULL) | |
9328 | { | |
9329 | complaint (&symfile_complaints, | |
9330 | _("child DW_TAG_imported_declaration has unknown " | |
9331 | "imported name - DIE at 0x%x [in module %s]"), | |
9c541725 | 9332 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
32019081 JK |
9333 | continue; |
9334 | } | |
9335 | ||
eb1e02fd | 9336 | excludes.push_back (imported_name); |
32019081 JK |
9337 | |
9338 | process_die (child_die, cu); | |
9339 | } | |
9340 | ||
22cee43f PMR |
9341 | add_using_directive (using_directives (cu->language), |
9342 | import_prefix, | |
9343 | canonical_name, | |
9344 | import_alias, | |
9345 | imported_declaration, | |
9346 | excludes, | |
9347 | 0, | |
9348 | &objfile->objfile_obstack); | |
27aa8d6a SW |
9349 | } |
9350 | ||
5230b05a WT |
9351 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
9352 | types, but gives them a size of zero. Starting with version 14, | |
9353 | ICC is compatible with GCC. */ | |
9354 | ||
9355 | static int | |
9356 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) | |
9357 | { | |
9358 | if (!cu->checked_producer) | |
9359 | check_producer (cu); | |
9360 | ||
9361 | return cu->producer_is_icc_lt_14; | |
9362 | } | |
9363 | ||
1b80a9fa JK |
9364 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
9365 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
9366 | this, it was first present in GCC release 4.3.0. */ | |
9367 | ||
9368 | static int | |
9369 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
9370 | { | |
9371 | if (!cu->checked_producer) | |
9372 | check_producer (cu); | |
9373 | ||
9374 | return cu->producer_is_gcc_lt_4_3; | |
9375 | } | |
9376 | ||
d721ba37 PA |
9377 | static file_and_directory |
9378 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 9379 | { |
d721ba37 PA |
9380 | file_and_directory res; |
9381 | ||
9291a0cd TT |
9382 | /* Find the filename. Do not use dwarf2_name here, since the filename |
9383 | is not a source language identifier. */ | |
d721ba37 PA |
9384 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
9385 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 9386 | |
d721ba37 PA |
9387 | if (res.comp_dir == NULL |
9388 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
9389 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 9390 | { |
d721ba37 PA |
9391 | res.comp_dir_storage = ldirname (res.name); |
9392 | if (!res.comp_dir_storage.empty ()) | |
9393 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 9394 | } |
d721ba37 | 9395 | if (res.comp_dir != NULL) |
9291a0cd TT |
9396 | { |
9397 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
9398 | directory, get rid of it. */ | |
d721ba37 | 9399 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 9400 | |
d721ba37 PA |
9401 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
9402 | res.comp_dir = cp + 1; | |
9291a0cd TT |
9403 | } |
9404 | ||
d721ba37 PA |
9405 | if (res.name == NULL) |
9406 | res.name = "<unknown>"; | |
9407 | ||
9408 | return res; | |
9291a0cd TT |
9409 | } |
9410 | ||
f4dc4d17 DE |
9411 | /* Handle DW_AT_stmt_list for a compilation unit. |
9412 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
9413 | COMP_DIR is the compilation directory. LOWPC is passed to |
9414 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
9415 | |
9416 | static void | |
9417 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 9418 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 9419 | { |
527f3840 | 9420 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 9421 | struct attribute *attr; |
527f3840 JK |
9422 | struct line_header line_header_local; |
9423 | hashval_t line_header_local_hash; | |
9424 | unsigned u; | |
9425 | void **slot; | |
9426 | int decode_mapping; | |
2ab95328 | 9427 | |
f4dc4d17 DE |
9428 | gdb_assert (! cu->per_cu->is_debug_types); |
9429 | ||
2ab95328 | 9430 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
9431 | if (attr == NULL) |
9432 | return; | |
9433 | ||
9c541725 | 9434 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
9435 | |
9436 | /* The line header hash table is only created if needed (it exists to | |
9437 | prevent redundant reading of the line table for partial_units). | |
9438 | If we're given a partial_unit, we'll need it. If we're given a | |
9439 | compile_unit, then use the line header hash table if it's already | |
9440 | created, but don't create one just yet. */ | |
9441 | ||
9442 | if (dwarf2_per_objfile->line_header_hash == NULL | |
9443 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 9444 | { |
527f3840 JK |
9445 | dwarf2_per_objfile->line_header_hash |
9446 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
9447 | line_header_eq_voidp, | |
9448 | free_line_header_voidp, | |
9449 | &objfile->objfile_obstack, | |
9450 | hashtab_obstack_allocate, | |
9451 | dummy_obstack_deallocate); | |
9452 | } | |
2ab95328 | 9453 | |
9c541725 | 9454 | line_header_local.sect_off = line_offset; |
527f3840 JK |
9455 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
9456 | line_header_local_hash = line_header_hash (&line_header_local); | |
9457 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
9458 | { | |
9459 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9460 | &line_header_local, | |
9461 | line_header_local_hash, NO_INSERT); | |
9462 | ||
9463 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
9464 | is not present in *SLOT (since if there is something in *SLOT then | |
9465 | it will be for a partial_unit). */ | |
9466 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 9467 | { |
527f3840 | 9468 | gdb_assert (*slot != NULL); |
9a3c8263 | 9469 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 9470 | return; |
dee91e82 | 9471 | } |
2ab95328 | 9472 | } |
527f3840 JK |
9473 | |
9474 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
9475 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
9476 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
9477 | if (lh == NULL) | |
527f3840 | 9478 | return; |
4c8aa72d PA |
9479 | |
9480 | cu->line_header = lh.release (); | |
9481 | cu->line_header_die_owner = die; | |
527f3840 JK |
9482 | |
9483 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
9484 | slot = NULL; | |
9485 | else | |
9486 | { | |
9487 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
9488 | &line_header_local, | |
9489 | line_header_local_hash, INSERT); | |
9490 | gdb_assert (slot != NULL); | |
9491 | } | |
9492 | if (slot != NULL && *slot == NULL) | |
9493 | { | |
9494 | /* This newly decoded line number information unit will be owned | |
9495 | by line_header_hash hash table. */ | |
9496 | *slot = cu->line_header; | |
4c8aa72d | 9497 | cu->line_header_die_owner = NULL; |
527f3840 JK |
9498 | } |
9499 | else | |
9500 | { | |
9501 | /* We cannot free any current entry in (*slot) as that struct line_header | |
9502 | may be already used by multiple CUs. Create only temporary decoded | |
9503 | line_header for this CU - it may happen at most once for each line | |
9504 | number information unit. And if we're not using line_header_hash | |
9505 | then this is what we want as well. */ | |
9506 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
9507 | } |
9508 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
9509 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
9510 | decode_mapping); | |
fff8551c | 9511 | |
2ab95328 TT |
9512 | } |
9513 | ||
95554aad | 9514 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 9515 | |
c906108c | 9516 | static void |
e7c27a73 | 9517 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9518 | { |
dee91e82 | 9519 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 9520 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 9521 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
9522 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
9523 | struct attribute *attr; | |
c906108c | 9524 | struct die_info *child_die; |
e142c38c | 9525 | CORE_ADDR baseaddr; |
6e70227d | 9526 | |
e142c38c | 9527 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 9528 | |
fae299cd | 9529 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
9530 | |
9531 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
9532 | from finish_block. */ | |
2acceee2 | 9533 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 9534 | lowpc = highpc; |
3e29f34a | 9535 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 9536 | |
d721ba37 | 9537 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 9538 | |
95554aad | 9539 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 9540 | |
f4b8a18d KW |
9541 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
9542 | standardised yet. As a workaround for the language detection we fall | |
9543 | back to the DW_AT_producer string. */ | |
9544 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
9545 | cu->language = language_opencl; | |
9546 | ||
3019eac3 DE |
9547 | /* Similar hack for Go. */ |
9548 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
9549 | set_cu_language (DW_LANG_Go, cu); | |
9550 | ||
d721ba37 | 9551 | dwarf2_start_symtab (cu, fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
9552 | |
9553 | /* Decode line number information if present. We do this before | |
9554 | processing child DIEs, so that the line header table is available | |
9555 | for DW_AT_decl_file. */ | |
d721ba37 | 9556 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
9557 | |
9558 | /* Process all dies in compilation unit. */ | |
9559 | if (die->child != NULL) | |
9560 | { | |
9561 | child_die = die->child; | |
9562 | while (child_die && child_die->tag) | |
9563 | { | |
9564 | process_die (child_die, cu); | |
9565 | child_die = sibling_die (child_die); | |
9566 | } | |
9567 | } | |
9568 | ||
9569 | /* Decode macro information, if present. Dwarf 2 macro information | |
9570 | refers to information in the line number info statement program | |
9571 | header, so we can only read it if we've read the header | |
9572 | successfully. */ | |
0af92d60 JK |
9573 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
9574 | if (attr == NULL) | |
9575 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
9576 | if (attr && cu->line_header) |
9577 | { | |
9578 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
9579 | complaint (&symfile_complaints, | |
0af92d60 | 9580 | _("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 9581 | |
43f3e411 | 9582 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
9583 | } |
9584 | else | |
9585 | { | |
9586 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
9587 | if (attr && cu->line_header) | |
9588 | { | |
9589 | unsigned int macro_offset = DW_UNSND (attr); | |
9590 | ||
43f3e411 | 9591 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
9592 | } |
9593 | } | |
3019eac3 DE |
9594 | } |
9595 | ||
f4dc4d17 DE |
9596 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
9597 | Create the set of symtabs used by this TU, or if this TU is sharing | |
9598 | symtabs with another TU and the symtabs have already been created | |
9599 | then restore those symtabs in the line header. | |
9600 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
9601 | |
9602 | static void | |
f4dc4d17 | 9603 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 9604 | { |
f4dc4d17 DE |
9605 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
9606 | struct type_unit_group *tu_group; | |
9607 | int first_time; | |
3019eac3 | 9608 | struct attribute *attr; |
9c541725 | 9609 | unsigned int i; |
0186c6a7 | 9610 | struct signatured_type *sig_type; |
3019eac3 | 9611 | |
f4dc4d17 | 9612 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 9613 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 9614 | |
f4dc4d17 | 9615 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 9616 | |
f4dc4d17 | 9617 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 9618 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
9619 | if (sig_type->type_unit_group == NULL) |
9620 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
9621 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
9622 | |
9623 | /* If we've already processed this stmt_list there's no real need to | |
9624 | do it again, we could fake it and just recreate the part we need | |
9625 | (file name,index -> symtab mapping). If data shows this optimization | |
9626 | is useful we can do it then. */ | |
43f3e411 | 9627 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
9628 | |
9629 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
9630 | debug info. */ | |
fff8551c | 9631 | line_header_up lh; |
f4dc4d17 | 9632 | if (attr != NULL) |
3019eac3 | 9633 | { |
9c541725 | 9634 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
f4dc4d17 DE |
9635 | lh = dwarf_decode_line_header (line_offset, cu); |
9636 | } | |
9637 | if (lh == NULL) | |
9638 | { | |
9639 | if (first_time) | |
9640 | dwarf2_start_symtab (cu, "", NULL, 0); | |
9641 | else | |
9642 | { | |
9643 | gdb_assert (tu_group->symtabs == NULL); | |
0ab9ce85 | 9644 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9645 | } |
f4dc4d17 | 9646 | return; |
3019eac3 DE |
9647 | } |
9648 | ||
4c8aa72d PA |
9649 | cu->line_header = lh.release (); |
9650 | cu->line_header_die_owner = die; | |
3019eac3 | 9651 | |
f4dc4d17 DE |
9652 | if (first_time) |
9653 | { | |
43f3e411 | 9654 | struct compunit_symtab *cust = dwarf2_start_symtab (cu, "", NULL, 0); |
3019eac3 | 9655 | |
1fd60fc0 DE |
9656 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
9657 | still initializing it, and our caller (a few levels up) | |
9658 | process_full_type_unit still needs to know if this is the first | |
9659 | time. */ | |
9660 | ||
4c8aa72d PA |
9661 | tu_group->num_symtabs = cu->line_header->file_names.size (); |
9662 | tu_group->symtabs = XNEWVEC (struct symtab *, | |
9663 | cu->line_header->file_names.size ()); | |
3019eac3 | 9664 | |
4c8aa72d | 9665 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 9666 | { |
4c8aa72d | 9667 | file_entry &fe = cu->line_header->file_names[i]; |
3019eac3 | 9668 | |
4c8aa72d | 9669 | dwarf2_start_subfile (fe.name, fe.include_dir (cu->line_header)); |
3019eac3 | 9670 | |
f4dc4d17 DE |
9671 | if (current_subfile->symtab == NULL) |
9672 | { | |
4c8aa72d PA |
9673 | /* NOTE: start_subfile will recognize when it's been |
9674 | passed a file it has already seen. So we can't | |
9675 | assume there's a simple mapping from | |
9676 | cu->line_header->file_names to subfiles, plus | |
9677 | cu->line_header->file_names may contain dups. */ | |
43f3e411 DE |
9678 | current_subfile->symtab |
9679 | = allocate_symtab (cust, current_subfile->name); | |
f4dc4d17 DE |
9680 | } |
9681 | ||
8c43009f PA |
9682 | fe.symtab = current_subfile->symtab; |
9683 | tu_group->symtabs[i] = fe.symtab; | |
f4dc4d17 DE |
9684 | } |
9685 | } | |
9686 | else | |
3019eac3 | 9687 | { |
0ab9ce85 | 9688 | restart_symtab (tu_group->compunit_symtab, "", 0); |
f4dc4d17 | 9689 | |
4c8aa72d | 9690 | for (i = 0; i < cu->line_header->file_names.size (); ++i) |
f4dc4d17 | 9691 | { |
4c8aa72d | 9692 | file_entry &fe = cu->line_header->file_names[i]; |
f4dc4d17 | 9693 | |
4c8aa72d | 9694 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 9695 | } |
3019eac3 DE |
9696 | } |
9697 | ||
f4dc4d17 DE |
9698 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
9699 | so they don't have a "real" (so to speak) symtab anyway. | |
9700 | There is later code that will assign the main symtab to all symbols | |
9701 | that don't have one. We need to handle the case of a symbol with a | |
9702 | missing symtab (DW_AT_decl_file) anyway. */ | |
9703 | } | |
3019eac3 | 9704 | |
f4dc4d17 DE |
9705 | /* Process DW_TAG_type_unit. |
9706 | For TUs we want to skip the first top level sibling if it's not the | |
9707 | actual type being defined by this TU. In this case the first top | |
9708 | level sibling is there to provide context only. */ | |
3019eac3 | 9709 | |
f4dc4d17 DE |
9710 | static void |
9711 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9712 | { | |
9713 | struct die_info *child_die; | |
3019eac3 | 9714 | |
f4dc4d17 DE |
9715 | prepare_one_comp_unit (cu, die, language_minimal); |
9716 | ||
9717 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
9718 | We do this before processing child DIEs, so that the line header table | |
9719 | is available for DW_AT_decl_file. */ | |
9720 | setup_type_unit_groups (die, cu); | |
9721 | ||
9722 | if (die->child != NULL) | |
9723 | { | |
9724 | child_die = die->child; | |
9725 | while (child_die && child_die->tag) | |
9726 | { | |
9727 | process_die (child_die, cu); | |
9728 | child_die = sibling_die (child_die); | |
9729 | } | |
9730 | } | |
3019eac3 DE |
9731 | } |
9732 | \f | |
80626a55 DE |
9733 | /* DWO/DWP files. |
9734 | ||
9735 | http://gcc.gnu.org/wiki/DebugFission | |
9736 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
9737 | ||
9738 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
9739 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
9740 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
9741 | |
9742 | static hashval_t | |
9743 | hash_dwo_file (const void *item) | |
9744 | { | |
9a3c8263 | 9745 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 9746 | hashval_t hash; |
3019eac3 | 9747 | |
a2ce51a0 DE |
9748 | hash = htab_hash_string (dwo_file->dwo_name); |
9749 | if (dwo_file->comp_dir != NULL) | |
9750 | hash += htab_hash_string (dwo_file->comp_dir); | |
9751 | return hash; | |
3019eac3 DE |
9752 | } |
9753 | ||
9754 | static int | |
9755 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
9756 | { | |
9a3c8263 SM |
9757 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
9758 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 9759 | |
a2ce51a0 DE |
9760 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
9761 | return 0; | |
9762 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
9763 | return lhs->comp_dir == rhs->comp_dir; | |
9764 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
9765 | } |
9766 | ||
9767 | /* Allocate a hash table for DWO files. */ | |
9768 | ||
9769 | static htab_t | |
9770 | allocate_dwo_file_hash_table (void) | |
9771 | { | |
9772 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9773 | ||
9774 | return htab_create_alloc_ex (41, | |
9775 | hash_dwo_file, | |
9776 | eq_dwo_file, | |
9777 | NULL, | |
9778 | &objfile->objfile_obstack, | |
9779 | hashtab_obstack_allocate, | |
9780 | dummy_obstack_deallocate); | |
9781 | } | |
9782 | ||
80626a55 DE |
9783 | /* Lookup DWO file DWO_NAME. */ |
9784 | ||
9785 | static void ** | |
0ac5b59e | 9786 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
9787 | { |
9788 | struct dwo_file find_entry; | |
9789 | void **slot; | |
9790 | ||
9791 | if (dwarf2_per_objfile->dwo_files == NULL) | |
9792 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
9793 | ||
9794 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
9795 | find_entry.dwo_name = dwo_name; |
9796 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
9797 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
9798 | ||
9799 | return slot; | |
9800 | } | |
9801 | ||
3019eac3 DE |
9802 | static hashval_t |
9803 | hash_dwo_unit (const void *item) | |
9804 | { | |
9a3c8263 | 9805 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
9806 | |
9807 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
9808 | return dwo_unit->signature; | |
9809 | } | |
9810 | ||
9811 | static int | |
9812 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
9813 | { | |
9a3c8263 SM |
9814 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
9815 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
9816 | |
9817 | /* The signature is assumed to be unique within the DWO file. | |
9818 | So while object file CU dwo_id's always have the value zero, | |
9819 | that's OK, assuming each object file DWO file has only one CU, | |
9820 | and that's the rule for now. */ | |
9821 | return lhs->signature == rhs->signature; | |
9822 | } | |
9823 | ||
9824 | /* Allocate a hash table for DWO CUs,TUs. | |
9825 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
9826 | ||
9827 | static htab_t | |
9828 | allocate_dwo_unit_table (struct objfile *objfile) | |
9829 | { | |
9830 | /* Start out with a pretty small number. | |
9831 | Generally DWO files contain only one CU and maybe some TUs. */ | |
9832 | return htab_create_alloc_ex (3, | |
9833 | hash_dwo_unit, | |
9834 | eq_dwo_unit, | |
9835 | NULL, | |
9836 | &objfile->objfile_obstack, | |
9837 | hashtab_obstack_allocate, | |
9838 | dummy_obstack_deallocate); | |
9839 | } | |
9840 | ||
80626a55 | 9841 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 9842 | |
19c3d4c9 | 9843 | struct create_dwo_cu_data |
3019eac3 DE |
9844 | { |
9845 | struct dwo_file *dwo_file; | |
19c3d4c9 | 9846 | struct dwo_unit dwo_unit; |
3019eac3 DE |
9847 | }; |
9848 | ||
19c3d4c9 | 9849 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
9850 | |
9851 | static void | |
19c3d4c9 DE |
9852 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
9853 | const gdb_byte *info_ptr, | |
9854 | struct die_info *comp_unit_die, | |
9855 | int has_children, | |
9856 | void *datap) | |
3019eac3 DE |
9857 | { |
9858 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 9859 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 9860 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 9861 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 9862 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 9863 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 9864 | struct attribute *attr; |
3019eac3 DE |
9865 | |
9866 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
9867 | if (attr == NULL) | |
9868 | { | |
19c3d4c9 DE |
9869 | complaint (&symfile_complaints, |
9870 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
9871 | " its dwo_id [in module %s]"), | |
9c541725 | 9872 | to_underlying (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
9873 | return; |
9874 | } | |
9875 | ||
3019eac3 DE |
9876 | dwo_unit->dwo_file = dwo_file; |
9877 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 9878 | dwo_unit->section = section; |
9c541725 | 9879 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
9880 | dwo_unit->length = cu->per_cu->length; |
9881 | ||
b4f54984 | 9882 | if (dwarf_read_debug) |
4031ecc5 | 9883 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
9c541725 PA |
9884 | to_underlying (sect_off), |
9885 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
9886 | } |
9887 | ||
33c5cd75 | 9888 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 9889 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 9890 | |
33c5cd75 DB |
9891 | static void |
9892 | create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
9893 | htab_t &cus_htab) | |
3019eac3 DE |
9894 | { |
9895 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
33c5cd75 | 9896 | const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev; |
d521ce57 | 9897 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 9898 | |
33c5cd75 DB |
9899 | dwarf2_read_section (objfile, §ion); |
9900 | info_ptr = section.buffer; | |
3019eac3 DE |
9901 | |
9902 | if (info_ptr == NULL) | |
33c5cd75 | 9903 | return; |
3019eac3 | 9904 | |
b4f54984 | 9905 | if (dwarf_read_debug) |
19c3d4c9 DE |
9906 | { |
9907 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
9908 | get_section_name (§ion), |
9909 | get_section_file_name (§ion)); | |
19c3d4c9 | 9910 | } |
3019eac3 | 9911 | |
33c5cd75 | 9912 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
9913 | while (info_ptr < end_ptr) |
9914 | { | |
9915 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
9916 | struct create_dwo_cu_data create_dwo_cu_data; |
9917 | struct dwo_unit *dwo_unit; | |
9918 | void **slot; | |
9919 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 9920 | |
19c3d4c9 DE |
9921 | memset (&create_dwo_cu_data.dwo_unit, 0, |
9922 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
9923 | memset (&per_cu, 0, sizeof (per_cu)); |
9924 | per_cu.objfile = objfile; | |
9925 | per_cu.is_debug_types = 0; | |
33c5cd75 DB |
9926 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
9927 | per_cu.section = §ion; | |
c5ed0576 | 9928 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
9929 | |
9930 | init_cutu_and_read_dies_no_follow ( | |
9931 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
9932 | info_ptr += per_cu.length; | |
9933 | ||
9934 | // If the unit could not be parsed, skip it. | |
9935 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
9936 | continue; | |
3019eac3 | 9937 | |
33c5cd75 DB |
9938 | if (cus_htab == NULL) |
9939 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 9940 | |
33c5cd75 DB |
9941 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
9942 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
9943 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
9944 | gdb_assert (slot != NULL); | |
9945 | if (*slot != NULL) | |
19c3d4c9 | 9946 | { |
33c5cd75 DB |
9947 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
9948 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 9949 | |
33c5cd75 DB |
9950 | complaint (&symfile_complaints, |
9951 | _("debug cu entry at offset 0x%x is duplicate to" | |
9952 | " the entry at offset 0x%x, signature %s"), | |
9953 | to_underlying (sect_off), to_underlying (dup_sect_off), | |
9954 | hex_string (dwo_unit->signature)); | |
19c3d4c9 | 9955 | } |
33c5cd75 | 9956 | *slot = (void *)dwo_unit; |
3019eac3 | 9957 | } |
3019eac3 DE |
9958 | } |
9959 | ||
80626a55 DE |
9960 | /* DWP file .debug_{cu,tu}_index section format: |
9961 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9962 | ||
d2415c6c DE |
9963 | DWP Version 1: |
9964 | ||
80626a55 DE |
9965 | Both index sections have the same format, and serve to map a 64-bit |
9966 | signature to a set of section numbers. Each section begins with a header, | |
9967 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9968 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9969 | aligned at 8-byte boundaries in the file. | |
9970 | ||
d2415c6c DE |
9971 | The index section header consists of: |
9972 | ||
9973 | V, 32 bit version number | |
9974 | -, 32 bits unused | |
9975 | N, 32 bit number of compilation units or type units in the index | |
9976 | M, 32 bit number of slots in the hash table | |
80626a55 | 9977 | |
d2415c6c | 9978 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9979 | |
d2415c6c DE |
9980 | The hash table begins at offset 16 in the section, and consists of an array |
9981 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9982 | order of the application binary). Unused slots in the hash table are 0. | |
9983 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9984 | |
d2415c6c DE |
9985 | The parallel table begins immediately after the hash table |
9986 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9987 | array of 32-bit indexes (using the byte order of the application binary), | |
9988 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9989 | table contains a 32-bit index into the pool of section numbers. For unused | |
9990 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9991 | |
73869dc2 DE |
9992 | The pool of section numbers begins immediately following the hash table |
9993 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9994 | section numbers consists of an array of 32-bit words (using the byte order | |
9995 | of the application binary). Each item in the array is indexed starting | |
9996 | from 0. The hash table entry provides the index of the first section | |
9997 | number in the set. Additional section numbers in the set follow, and the | |
9998 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
9999 | ||
10000 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10001 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10002 | be the second entry. Other members of the set may follow in any order. | |
10003 | ||
10004 | --- | |
10005 | ||
10006 | DWP Version 2: | |
10007 | ||
10008 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
10009 | and the entries in the index tables are now offsets into these sections. | |
10010 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10011 | section. | |
10012 | ||
10013 | Index Section Contents: | |
10014 | Header | |
10015 | Hash Table of Signatures dwp_hash_table.hash_table | |
10016 | Parallel Table of Indices dwp_hash_table.unit_table | |
10017 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
10018 | Table of Section Sizes dwp_hash_table.v2.sizes | |
10019 | ||
10020 | The index section header consists of: | |
10021 | ||
10022 | V, 32 bit version number | |
10023 | L, 32 bit number of columns in the table of section offsets | |
10024 | N, 32 bit number of compilation units or type units in the index | |
10025 | M, 32 bit number of slots in the hash table | |
10026 | ||
10027 | Numbers are recorded using the byte order of the application binary. | |
10028 | ||
10029 | The hash table has the same format as version 1. | |
10030 | The parallel table of indices has the same format as version 1, | |
10031 | except that the entries are origin-1 indices into the table of sections | |
10032 | offsets and the table of section sizes. | |
10033 | ||
10034 | The table of offsets begins immediately following the parallel table | |
10035 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
10036 | a two-dimensional array of 32-bit words (using the byte order of the | |
10037 | application binary), with L columns and N+1 rows, in row-major order. | |
10038 | Each row in the array is indexed starting from 0. The first row provides | |
10039 | a key to the remaining rows: each column in this row provides an identifier | |
10040 | for a debug section, and the offsets in the same column of subsequent rows | |
10041 | refer to that section. The section identifiers are: | |
10042 | ||
10043 | DW_SECT_INFO 1 .debug_info.dwo | |
10044 | DW_SECT_TYPES 2 .debug_types.dwo | |
10045 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
10046 | DW_SECT_LINE 4 .debug_line.dwo | |
10047 | DW_SECT_LOC 5 .debug_loc.dwo | |
10048 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
10049 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
10050 | DW_SECT_MACRO 8 .debug_macro.dwo | |
10051 | ||
10052 | The offsets provided by the CU and TU index sections are the base offsets | |
10053 | for the contributions made by each CU or TU to the corresponding section | |
10054 | in the package file. Each CU and TU header contains an abbrev_offset | |
10055 | field, used to find the abbreviations table for that CU or TU within the | |
10056 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
10057 | be interpreted as relative to the base offset given in the index section. | |
10058 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
10059 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
10060 | and offsets into other debug sections obtained from DWARF attributes should | |
10061 | also be interpreted as relative to the corresponding base offset. | |
10062 | ||
10063 | The table of sizes begins immediately following the table of offsets. | |
10064 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
10065 | with L columns and N rows, in row-major order. Each row in the array is | |
10066 | indexed starting from 1 (row 0 is shared by the two tables). | |
10067 | ||
10068 | --- | |
10069 | ||
10070 | Hash table lookup is handled the same in version 1 and 2: | |
10071 | ||
10072 | We assume that N and M will not exceed 2^32 - 1. | |
10073 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
10074 | ||
d2415c6c DE |
10075 | Given a 64-bit compilation unit signature or a type signature S, an entry |
10076 | in the hash table is located as follows: | |
80626a55 | 10077 | |
d2415c6c DE |
10078 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
10079 | the low-order k bits all set to 1. | |
80626a55 | 10080 | |
d2415c6c | 10081 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 10082 | |
d2415c6c DE |
10083 | 3) If the hash table entry at index H matches the signature, use that |
10084 | entry. If the hash table entry at index H is unused (all zeroes), | |
10085 | terminate the search: the signature is not present in the table. | |
80626a55 | 10086 | |
d2415c6c | 10087 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 10088 | |
d2415c6c | 10089 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 10090 | to stop at an unused slot or find the match. */ |
80626a55 DE |
10091 | |
10092 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
10093 | .debug_{info,types}.dwo in DWP_FILE. | |
10094 | Returns NULL if there isn't one. | |
10095 | Note: This function processes DWP files only, not DWO files. */ | |
10096 | ||
10097 | static struct dwp_hash_table * | |
10098 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
10099 | { | |
10100 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10101 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 10102 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 10103 | struct dwarf2_section_info *index; |
73869dc2 | 10104 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
10105 | struct dwp_hash_table *htab; |
10106 | ||
10107 | if (is_debug_types) | |
10108 | index = &dwp_file->sections.tu_index; | |
10109 | else | |
10110 | index = &dwp_file->sections.cu_index; | |
10111 | ||
10112 | if (dwarf2_section_empty_p (index)) | |
10113 | return NULL; | |
10114 | dwarf2_read_section (objfile, index); | |
10115 | ||
10116 | index_ptr = index->buffer; | |
10117 | index_end = index_ptr + index->size; | |
10118 | ||
10119 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
10120 | index_ptr += 4; |
10121 | if (version == 2) | |
10122 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
10123 | else | |
10124 | nr_columns = 0; | |
10125 | index_ptr += 4; | |
80626a55 DE |
10126 | nr_units = read_4_bytes (dbfd, index_ptr); |
10127 | index_ptr += 4; | |
10128 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
10129 | index_ptr += 4; | |
10130 | ||
73869dc2 | 10131 | if (version != 1 && version != 2) |
80626a55 | 10132 | { |
21aa081e | 10133 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 10134 | " [in module %s]"), |
21aa081e | 10135 | pulongest (version), dwp_file->name); |
80626a55 DE |
10136 | } |
10137 | if (nr_slots != (nr_slots & -nr_slots)) | |
10138 | { | |
21aa081e | 10139 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 10140 | " is not power of 2 [in module %s]"), |
21aa081e | 10141 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
10142 | } |
10143 | ||
10144 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
10145 | htab->version = version; |
10146 | htab->nr_columns = nr_columns; | |
80626a55 DE |
10147 | htab->nr_units = nr_units; |
10148 | htab->nr_slots = nr_slots; | |
10149 | htab->hash_table = index_ptr; | |
10150 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
10151 | |
10152 | /* Exit early if the table is empty. */ | |
10153 | if (nr_slots == 0 || nr_units == 0 | |
10154 | || (version == 2 && nr_columns == 0)) | |
10155 | { | |
10156 | /* All must be zero. */ | |
10157 | if (nr_slots != 0 || nr_units != 0 | |
10158 | || (version == 2 && nr_columns != 0)) | |
10159 | { | |
10160 | complaint (&symfile_complaints, | |
10161 | _("Empty DWP but nr_slots,nr_units,nr_columns not" | |
10162 | " all zero [in modules %s]"), | |
10163 | dwp_file->name); | |
10164 | } | |
10165 | return htab; | |
10166 | } | |
10167 | ||
10168 | if (version == 1) | |
10169 | { | |
10170 | htab->section_pool.v1.indices = | |
10171 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10172 | /* It's harder to decide whether the section is too small in v1. | |
10173 | V1 is deprecated anyway so we punt. */ | |
10174 | } | |
10175 | else | |
10176 | { | |
10177 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
10178 | int *ids = htab->section_pool.v2.section_ids; | |
10179 | /* Reverse map for error checking. */ | |
10180 | int ids_seen[DW_SECT_MAX + 1]; | |
10181 | int i; | |
10182 | ||
10183 | if (nr_columns < 2) | |
10184 | { | |
10185 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
10186 | " in section table [in module %s]"), | |
10187 | dwp_file->name); | |
10188 | } | |
10189 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
10190 | { | |
10191 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
10192 | " in section table [in module %s]"), | |
10193 | dwp_file->name); | |
10194 | } | |
10195 | memset (ids, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10196 | memset (ids_seen, 255, (DW_SECT_MAX + 1) * sizeof (int32_t)); | |
10197 | for (i = 0; i < nr_columns; ++i) | |
10198 | { | |
10199 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
10200 | ||
10201 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
10202 | { | |
10203 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
10204 | " in section table [in module %s]"), | |
10205 | id, dwp_file->name); | |
10206 | } | |
10207 | if (ids_seen[id] != -1) | |
10208 | { | |
10209 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
10210 | " id %d in section table [in module %s]"), | |
10211 | id, dwp_file->name); | |
10212 | } | |
10213 | ids_seen[id] = i; | |
10214 | ids[i] = id; | |
10215 | } | |
10216 | /* Must have exactly one info or types section. */ | |
10217 | if (((ids_seen[DW_SECT_INFO] != -1) | |
10218 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
10219 | != 1) | |
10220 | { | |
10221 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
10222 | " DWO info/types section [in module %s]"), | |
10223 | dwp_file->name); | |
10224 | } | |
10225 | /* Must have an abbrev section. */ | |
10226 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
10227 | { | |
10228 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
10229 | " section [in module %s]"), | |
10230 | dwp_file->name); | |
10231 | } | |
10232 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
10233 | htab->section_pool.v2.sizes = | |
10234 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
10235 | * nr_units * nr_columns); | |
10236 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
10237 | * nr_units * nr_columns)) | |
10238 | > index_end) | |
10239 | { | |
10240 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
10241 | " [in module %s]"), | |
10242 | dwp_file->name); | |
10243 | } | |
10244 | } | |
80626a55 DE |
10245 | |
10246 | return htab; | |
10247 | } | |
10248 | ||
10249 | /* Update SECTIONS with the data from SECTP. | |
10250 | ||
10251 | This function is like the other "locate" section routines that are | |
10252 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 10253 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
10254 | |
10255 | The result is non-zero for success, or zero if an error was found. */ | |
10256 | ||
10257 | static int | |
73869dc2 DE |
10258 | locate_v1_virtual_dwo_sections (asection *sectp, |
10259 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
10260 | { |
10261 | const struct dwop_section_names *names = &dwop_section_names; | |
10262 | ||
10263 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10264 | { | |
10265 | /* There can be only one. */ | |
049412e3 | 10266 | if (sections->abbrev.s.section != NULL) |
80626a55 | 10267 | return 0; |
049412e3 | 10268 | sections->abbrev.s.section = sectp; |
80626a55 DE |
10269 | sections->abbrev.size = bfd_get_section_size (sectp); |
10270 | } | |
10271 | else if (section_is_p (sectp->name, &names->info_dwo) | |
10272 | || section_is_p (sectp->name, &names->types_dwo)) | |
10273 | { | |
10274 | /* There can be only one. */ | |
049412e3 | 10275 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 10276 | return 0; |
049412e3 | 10277 | sections->info_or_types.s.section = sectp; |
80626a55 DE |
10278 | sections->info_or_types.size = bfd_get_section_size (sectp); |
10279 | } | |
10280 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10281 | { | |
10282 | /* There can be only one. */ | |
049412e3 | 10283 | if (sections->line.s.section != NULL) |
80626a55 | 10284 | return 0; |
049412e3 | 10285 | sections->line.s.section = sectp; |
80626a55 DE |
10286 | sections->line.size = bfd_get_section_size (sectp); |
10287 | } | |
10288 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10289 | { | |
10290 | /* There can be only one. */ | |
049412e3 | 10291 | if (sections->loc.s.section != NULL) |
80626a55 | 10292 | return 0; |
049412e3 | 10293 | sections->loc.s.section = sectp; |
80626a55 DE |
10294 | sections->loc.size = bfd_get_section_size (sectp); |
10295 | } | |
10296 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10297 | { | |
10298 | /* There can be only one. */ | |
049412e3 | 10299 | if (sections->macinfo.s.section != NULL) |
80626a55 | 10300 | return 0; |
049412e3 | 10301 | sections->macinfo.s.section = sectp; |
80626a55 DE |
10302 | sections->macinfo.size = bfd_get_section_size (sectp); |
10303 | } | |
10304 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10305 | { | |
10306 | /* There can be only one. */ | |
049412e3 | 10307 | if (sections->macro.s.section != NULL) |
80626a55 | 10308 | return 0; |
049412e3 | 10309 | sections->macro.s.section = sectp; |
80626a55 DE |
10310 | sections->macro.size = bfd_get_section_size (sectp); |
10311 | } | |
10312 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10313 | { | |
10314 | /* There can be only one. */ | |
049412e3 | 10315 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 10316 | return 0; |
049412e3 | 10317 | sections->str_offsets.s.section = sectp; |
80626a55 DE |
10318 | sections->str_offsets.size = bfd_get_section_size (sectp); |
10319 | } | |
10320 | else | |
10321 | { | |
10322 | /* No other kind of section is valid. */ | |
10323 | return 0; | |
10324 | } | |
10325 | ||
10326 | return 1; | |
10327 | } | |
10328 | ||
73869dc2 DE |
10329 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
10330 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10331 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10332 | This is for DWP version 1 files. */ | |
80626a55 DE |
10333 | |
10334 | static struct dwo_unit * | |
73869dc2 DE |
10335 | create_dwo_unit_in_dwp_v1 (struct dwp_file *dwp_file, |
10336 | uint32_t unit_index, | |
10337 | const char *comp_dir, | |
10338 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
10339 | { |
10340 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
10341 | const struct dwp_hash_table *dwp_htab = |
10342 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 DE |
10343 | bfd *dbfd = dwp_file->dbfd; |
10344 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10345 | struct dwo_file *dwo_file; | |
10346 | struct dwo_unit *dwo_unit; | |
73869dc2 | 10347 | struct virtual_v1_dwo_sections sections; |
80626a55 DE |
10348 | void **dwo_file_slot; |
10349 | char *virtual_dwo_name; | |
80626a55 DE |
10350 | struct cleanup *cleanups; |
10351 | int i; | |
10352 | ||
73869dc2 DE |
10353 | gdb_assert (dwp_file->version == 1); |
10354 | ||
b4f54984 | 10355 | if (dwarf_read_debug) |
80626a55 | 10356 | { |
73869dc2 | 10357 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 10358 | kind, |
73869dc2 | 10359 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
10360 | dwp_file->name); |
10361 | } | |
10362 | ||
19ac8c2e | 10363 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
10364 | Put a limit on the number of sections we look for so that bad data |
10365 | doesn't cause us to loop forever. */ | |
10366 | ||
73869dc2 | 10367 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
10368 | (1 /* .debug_info or .debug_types */ \ |
10369 | + 1 /* .debug_abbrev */ \ | |
10370 | + 1 /* .debug_line */ \ | |
10371 | + 1 /* .debug_loc */ \ | |
10372 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 10373 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
10374 | + 1 /* trailing zero */) |
10375 | ||
10376 | memset (§ions, 0, sizeof (sections)); | |
10377 | cleanups = make_cleanup (null_cleanup, 0); | |
10378 | ||
73869dc2 | 10379 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
10380 | { |
10381 | asection *sectp; | |
10382 | uint32_t section_nr = | |
10383 | read_4_bytes (dbfd, | |
73869dc2 DE |
10384 | dwp_htab->section_pool.v1.indices |
10385 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
10386 | |
10387 | if (section_nr == 0) | |
10388 | break; | |
10389 | if (section_nr >= dwp_file->num_sections) | |
10390 | { | |
10391 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
10392 | " [in module %s]"), | |
10393 | dwp_file->name); | |
10394 | } | |
10395 | ||
10396 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 10397 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
10398 | { |
10399 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
10400 | " [in module %s]"), | |
10401 | dwp_file->name); | |
10402 | } | |
10403 | } | |
10404 | ||
10405 | if (i < 2 | |
a32a8923 DE |
10406 | || dwarf2_section_empty_p (§ions.info_or_types) |
10407 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
10408 | { |
10409 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
10410 | " [in module %s]"), | |
10411 | dwp_file->name); | |
10412 | } | |
73869dc2 | 10413 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
10414 | { |
10415 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
10416 | " [in module %s]"), | |
10417 | dwp_file->name); | |
10418 | } | |
10419 | ||
10420 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10421 | have dwo_unit "live" in that. At least for now. | |
10422 | ||
10423 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 10424 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
10425 | file, we can combine them back into a virtual DWO file to save space |
10426 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
10427 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
10428 | ||
2792b94d PM |
10429 | virtual_dwo_name = |
10430 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
10431 | get_section_id (§ions.abbrev), |
10432 | get_section_id (§ions.line), | |
10433 | get_section_id (§ions.loc), | |
10434 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
10435 | make_cleanup (xfree, virtual_dwo_name); |
10436 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 10437 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
10438 | /* Create one if necessary. */ |
10439 | if (*dwo_file_slot == NULL) | |
10440 | { | |
b4f54984 | 10441 | if (dwarf_read_debug) |
80626a55 DE |
10442 | { |
10443 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10444 | virtual_dwo_name); | |
10445 | } | |
10446 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10447 | dwo_file->dwo_name |
10448 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10449 | virtual_dwo_name, | |
10450 | strlen (virtual_dwo_name)); | |
0ac5b59e | 10451 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
10452 | dwo_file->sections.abbrev = sections.abbrev; |
10453 | dwo_file->sections.line = sections.line; | |
10454 | dwo_file->sections.loc = sections.loc; | |
10455 | dwo_file->sections.macinfo = sections.macinfo; | |
10456 | dwo_file->sections.macro = sections.macro; | |
10457 | dwo_file->sections.str_offsets = sections.str_offsets; | |
10458 | /* The "str" section is global to the entire DWP file. */ | |
10459 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 10460 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
10461 | there's no need to record it in dwo_file. |
10462 | Also, we can't simply record type sections in dwo_file because | |
10463 | we record a pointer into the vector in dwo_unit. As we collect more | |
10464 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
10465 | for it, invalidating all copies of pointers into the previous |
10466 | contents. */ | |
80626a55 DE |
10467 | *dwo_file_slot = dwo_file; |
10468 | } | |
10469 | else | |
10470 | { | |
b4f54984 | 10471 | if (dwarf_read_debug) |
80626a55 DE |
10472 | { |
10473 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10474 | virtual_dwo_name); | |
10475 | } | |
9a3c8263 | 10476 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 DE |
10477 | } |
10478 | do_cleanups (cleanups); | |
10479 | ||
10480 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10481 | dwo_unit->dwo_file = dwo_file; | |
10482 | dwo_unit->signature = signature; | |
8d749320 SM |
10483 | dwo_unit->section = |
10484 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 10485 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 10486 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
10487 | |
10488 | return dwo_unit; | |
10489 | } | |
10490 | ||
73869dc2 DE |
10491 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
10492 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
10493 | piece within that section used by a TU/CU, return a virtual section | |
10494 | of just that piece. */ | |
10495 | ||
10496 | static struct dwarf2_section_info | |
10497 | create_dwp_v2_section (struct dwarf2_section_info *section, | |
10498 | bfd_size_type offset, bfd_size_type size) | |
10499 | { | |
10500 | struct dwarf2_section_info result; | |
10501 | asection *sectp; | |
10502 | ||
10503 | gdb_assert (section != NULL); | |
10504 | gdb_assert (!section->is_virtual); | |
10505 | ||
10506 | memset (&result, 0, sizeof (result)); | |
10507 | result.s.containing_section = section; | |
10508 | result.is_virtual = 1; | |
10509 | ||
10510 | if (size == 0) | |
10511 | return result; | |
10512 | ||
10513 | sectp = get_section_bfd_section (section); | |
10514 | ||
10515 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
10516 | bounds of the real section. This is a pretty-rare event, so just | |
10517 | flag an error (easier) instead of a warning and trying to cope. */ | |
10518 | if (sectp == NULL | |
10519 | || offset + size > bfd_get_section_size (sectp)) | |
10520 | { | |
10521 | bfd *abfd = sectp->owner; | |
10522 | ||
10523 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" | |
10524 | " in section %s [in module %s]"), | |
10525 | sectp ? bfd_section_name (abfd, sectp) : "<unknown>", | |
10526 | objfile_name (dwarf2_per_objfile->objfile)); | |
10527 | } | |
10528 | ||
10529 | result.virtual_offset = offset; | |
10530 | result.size = size; | |
10531 | return result; | |
10532 | } | |
10533 | ||
10534 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
10535 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
10536 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
10537 | This is for DWP version 2 files. */ | |
10538 | ||
10539 | static struct dwo_unit * | |
10540 | create_dwo_unit_in_dwp_v2 (struct dwp_file *dwp_file, | |
10541 | uint32_t unit_index, | |
10542 | const char *comp_dir, | |
10543 | ULONGEST signature, int is_debug_types) | |
10544 | { | |
10545 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
10546 | const struct dwp_hash_table *dwp_htab = | |
10547 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
10548 | bfd *dbfd = dwp_file->dbfd; | |
10549 | const char *kind = is_debug_types ? "TU" : "CU"; | |
10550 | struct dwo_file *dwo_file; | |
10551 | struct dwo_unit *dwo_unit; | |
10552 | struct virtual_v2_dwo_sections sections; | |
10553 | void **dwo_file_slot; | |
10554 | char *virtual_dwo_name; | |
73869dc2 DE |
10555 | struct cleanup *cleanups; |
10556 | int i; | |
10557 | ||
10558 | gdb_assert (dwp_file->version == 2); | |
10559 | ||
b4f54984 | 10560 | if (dwarf_read_debug) |
73869dc2 DE |
10561 | { |
10562 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
10563 | kind, | |
10564 | pulongest (unit_index), hex_string (signature), | |
10565 | dwp_file->name); | |
10566 | } | |
10567 | ||
10568 | /* Fetch the section offsets of this DWO unit. */ | |
10569 | ||
10570 | memset (§ions, 0, sizeof (sections)); | |
10571 | cleanups = make_cleanup (null_cleanup, 0); | |
10572 | ||
10573 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
10574 | { | |
10575 | uint32_t offset = read_4_bytes (dbfd, | |
10576 | dwp_htab->section_pool.v2.offsets | |
10577 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10578 | + i) | |
10579 | * sizeof (uint32_t))); | |
10580 | uint32_t size = read_4_bytes (dbfd, | |
10581 | dwp_htab->section_pool.v2.sizes | |
10582 | + (((unit_index - 1) * dwp_htab->nr_columns | |
10583 | + i) | |
10584 | * sizeof (uint32_t))); | |
10585 | ||
10586 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
10587 | { | |
10588 | case DW_SECT_INFO: | |
10589 | case DW_SECT_TYPES: | |
10590 | sections.info_or_types_offset = offset; | |
10591 | sections.info_or_types_size = size; | |
10592 | break; | |
10593 | case DW_SECT_ABBREV: | |
10594 | sections.abbrev_offset = offset; | |
10595 | sections.abbrev_size = size; | |
10596 | break; | |
10597 | case DW_SECT_LINE: | |
10598 | sections.line_offset = offset; | |
10599 | sections.line_size = size; | |
10600 | break; | |
10601 | case DW_SECT_LOC: | |
10602 | sections.loc_offset = offset; | |
10603 | sections.loc_size = size; | |
10604 | break; | |
10605 | case DW_SECT_STR_OFFSETS: | |
10606 | sections.str_offsets_offset = offset; | |
10607 | sections.str_offsets_size = size; | |
10608 | break; | |
10609 | case DW_SECT_MACINFO: | |
10610 | sections.macinfo_offset = offset; | |
10611 | sections.macinfo_size = size; | |
10612 | break; | |
10613 | case DW_SECT_MACRO: | |
10614 | sections.macro_offset = offset; | |
10615 | sections.macro_size = size; | |
10616 | break; | |
10617 | } | |
10618 | } | |
10619 | ||
10620 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
10621 | have dwo_unit "live" in that. At least for now. | |
10622 | ||
10623 | The DWP file can be made up of a random collection of CUs and TUs. | |
10624 | However, for each CU + set of TUs that came from the same original DWO | |
10625 | file, we can combine them back into a virtual DWO file to save space | |
10626 | (fewer struct dwo_file objects to allocate). Remember that for really | |
10627 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
10628 | ||
10629 | virtual_dwo_name = | |
10630 | xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
10631 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
10632 | (long) (sections.line_size ? sections.line_offset : 0), | |
10633 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
10634 | (long) (sections.str_offsets_size | |
10635 | ? sections.str_offsets_offset : 0)); | |
10636 | make_cleanup (xfree, virtual_dwo_name); | |
10637 | /* Can we use an existing virtual DWO file? */ | |
10638 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); | |
10639 | /* Create one if necessary. */ | |
10640 | if (*dwo_file_slot == NULL) | |
10641 | { | |
b4f54984 | 10642 | if (dwarf_read_debug) |
73869dc2 DE |
10643 | { |
10644 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
10645 | virtual_dwo_name); | |
10646 | } | |
10647 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
224c3ddb SM |
10648 | dwo_file->dwo_name |
10649 | = (const char *) obstack_copy0 (&objfile->objfile_obstack, | |
10650 | virtual_dwo_name, | |
10651 | strlen (virtual_dwo_name)); | |
73869dc2 DE |
10652 | dwo_file->comp_dir = comp_dir; |
10653 | dwo_file->sections.abbrev = | |
10654 | create_dwp_v2_section (&dwp_file->sections.abbrev, | |
10655 | sections.abbrev_offset, sections.abbrev_size); | |
10656 | dwo_file->sections.line = | |
10657 | create_dwp_v2_section (&dwp_file->sections.line, | |
10658 | sections.line_offset, sections.line_size); | |
10659 | dwo_file->sections.loc = | |
10660 | create_dwp_v2_section (&dwp_file->sections.loc, | |
10661 | sections.loc_offset, sections.loc_size); | |
10662 | dwo_file->sections.macinfo = | |
10663 | create_dwp_v2_section (&dwp_file->sections.macinfo, | |
10664 | sections.macinfo_offset, sections.macinfo_size); | |
10665 | dwo_file->sections.macro = | |
10666 | create_dwp_v2_section (&dwp_file->sections.macro, | |
10667 | sections.macro_offset, sections.macro_size); | |
10668 | dwo_file->sections.str_offsets = | |
10669 | create_dwp_v2_section (&dwp_file->sections.str_offsets, | |
10670 | sections.str_offsets_offset, | |
10671 | sections.str_offsets_size); | |
10672 | /* The "str" section is global to the entire DWP file. */ | |
10673 | dwo_file->sections.str = dwp_file->sections.str; | |
10674 | /* The info or types section is assigned below to dwo_unit, | |
10675 | there's no need to record it in dwo_file. | |
10676 | Also, we can't simply record type sections in dwo_file because | |
10677 | we record a pointer into the vector in dwo_unit. As we collect more | |
10678 | types we'll grow the vector and eventually have to reallocate space | |
10679 | for it, invalidating all copies of pointers into the previous | |
10680 | contents. */ | |
10681 | *dwo_file_slot = dwo_file; | |
10682 | } | |
10683 | else | |
10684 | { | |
b4f54984 | 10685 | if (dwarf_read_debug) |
73869dc2 DE |
10686 | { |
10687 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
10688 | virtual_dwo_name); | |
10689 | } | |
9a3c8263 | 10690 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 DE |
10691 | } |
10692 | do_cleanups (cleanups); | |
10693 | ||
10694 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
10695 | dwo_unit->dwo_file = dwo_file; | |
10696 | dwo_unit->signature = signature; | |
8d749320 SM |
10697 | dwo_unit->section = |
10698 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
73869dc2 DE |
10699 | *dwo_unit->section = create_dwp_v2_section (is_debug_types |
10700 | ? &dwp_file->sections.types | |
10701 | : &dwp_file->sections.info, | |
10702 | sections.info_or_types_offset, | |
10703 | sections.info_or_types_size); | |
10704 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
10705 | ||
10706 | return dwo_unit; | |
10707 | } | |
10708 | ||
57d63ce2 DE |
10709 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
10710 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
10711 | |
10712 | static struct dwo_unit * | |
57d63ce2 DE |
10713 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
10714 | ULONGEST signature, int is_debug_types) | |
80626a55 | 10715 | { |
57d63ce2 DE |
10716 | const struct dwp_hash_table *dwp_htab = |
10717 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 10718 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 10719 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
10720 | uint32_t hash = signature & mask; |
10721 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
10722 | unsigned int i; | |
10723 | void **slot; | |
870f88f7 | 10724 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
10725 | |
10726 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
10727 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
10728 | slot = htab_find_slot (is_debug_types |
10729 | ? dwp_file->loaded_tus | |
10730 | : dwp_file->loaded_cus, | |
10731 | &find_dwo_cu, INSERT); | |
80626a55 DE |
10732 | |
10733 | if (*slot != NULL) | |
9a3c8263 | 10734 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10735 | |
10736 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 10737 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
10738 | { |
10739 | ULONGEST signature_in_table; | |
10740 | ||
10741 | signature_in_table = | |
57d63ce2 | 10742 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
10743 | if (signature_in_table == signature) |
10744 | { | |
57d63ce2 DE |
10745 | uint32_t unit_index = |
10746 | read_4_bytes (dbfd, | |
10747 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 10748 | |
73869dc2 DE |
10749 | if (dwp_file->version == 1) |
10750 | { | |
10751 | *slot = create_dwo_unit_in_dwp_v1 (dwp_file, unit_index, | |
10752 | comp_dir, signature, | |
10753 | is_debug_types); | |
10754 | } | |
10755 | else | |
10756 | { | |
10757 | *slot = create_dwo_unit_in_dwp_v2 (dwp_file, unit_index, | |
10758 | comp_dir, signature, | |
10759 | is_debug_types); | |
10760 | } | |
9a3c8263 | 10761 | return (struct dwo_unit *) *slot; |
80626a55 DE |
10762 | } |
10763 | if (signature_in_table == 0) | |
10764 | return NULL; | |
10765 | hash = (hash + hash2) & mask; | |
10766 | } | |
10767 | ||
10768 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
10769 | " [in module %s]"), | |
10770 | dwp_file->name); | |
10771 | } | |
10772 | ||
ab5088bf | 10773 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
10774 | Open the file specified by FILE_NAME and hand it off to BFD for |
10775 | preliminary analysis. Return a newly initialized bfd *, which | |
10776 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 10777 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
10778 | SEARCH_CWD is true if the current directory is to be searched. |
10779 | It will be searched before debug-file-directory. | |
13aaf454 DE |
10780 | If successful, the file is added to the bfd include table of the |
10781 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 10782 | If unable to find/open the file, return NULL. |
3019eac3 DE |
10783 | NOTE: This function is derived from symfile_bfd_open. */ |
10784 | ||
192b62ce | 10785 | static gdb_bfd_ref_ptr |
6ac97d4c | 10786 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 10787 | { |
80626a55 | 10788 | int desc, flags; |
3019eac3 | 10789 | char *absolute_name; |
9c02c129 DE |
10790 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
10791 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
10792 | to debug_file_directory. */ | |
10793 | char *search_path; | |
10794 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
10795 | ||
6ac97d4c DE |
10796 | if (search_cwd) |
10797 | { | |
10798 | if (*debug_file_directory != '\0') | |
10799 | search_path = concat (".", dirname_separator_string, | |
b36cec19 | 10800 | debug_file_directory, (char *) NULL); |
6ac97d4c DE |
10801 | else |
10802 | search_path = xstrdup ("."); | |
10803 | } | |
9c02c129 | 10804 | else |
6ac97d4c | 10805 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 10806 | |
492c0ab7 | 10807 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
10808 | if (is_dwp) |
10809 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 10810 | desc = openp (search_path, flags, file_name, |
3019eac3 | 10811 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 10812 | xfree (search_path); |
3019eac3 DE |
10813 | if (desc < 0) |
10814 | return NULL; | |
10815 | ||
192b62ce | 10816 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name, gnutarget, desc)); |
a4453b7e | 10817 | xfree (absolute_name); |
9c02c129 DE |
10818 | if (sym_bfd == NULL) |
10819 | return NULL; | |
192b62ce | 10820 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 10821 | |
192b62ce TT |
10822 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
10823 | return NULL; | |
3019eac3 | 10824 | |
13aaf454 DE |
10825 | /* Success. Record the bfd as having been included by the objfile's bfd. |
10826 | This is important because things like demangled_names_hash lives in the | |
10827 | objfile's per_bfd space and may have references to things like symbol | |
10828 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 10829 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 10830 | |
3019eac3 DE |
10831 | return sym_bfd; |
10832 | } | |
10833 | ||
ab5088bf | 10834 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
10835 | COMP_DIR is the DW_AT_comp_dir attribute. |
10836 | The result is the bfd handle of the file. | |
10837 | If there is a problem finding or opening the file, return NULL. | |
10838 | Upon success, the canonicalized path of the file is stored in the bfd, | |
10839 | same as symfile_bfd_open. */ | |
10840 | ||
192b62ce | 10841 | static gdb_bfd_ref_ptr |
ab5088bf | 10842 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 | 10843 | { |
80626a55 | 10844 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 10845 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
10846 | |
10847 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
10848 | ||
10849 | if (comp_dir != NULL) | |
10850 | { | |
b36cec19 PA |
10851 | char *path_to_try = concat (comp_dir, SLASH_STRING, |
10852 | file_name, (char *) NULL); | |
3019eac3 DE |
10853 | |
10854 | /* NOTE: If comp_dir is a relative path, this will also try the | |
10855 | search path, which seems useful. */ | |
192b62ce TT |
10856 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (path_to_try, 0 /*is_dwp*/, |
10857 | 1 /*search_cwd*/)); | |
3019eac3 DE |
10858 | xfree (path_to_try); |
10859 | if (abfd != NULL) | |
10860 | return abfd; | |
10861 | } | |
10862 | ||
10863 | /* That didn't work, try debug-file-directory, which, despite its name, | |
10864 | is a list of paths. */ | |
10865 | ||
10866 | if (*debug_file_directory == '\0') | |
10867 | return NULL; | |
10868 | ||
6ac97d4c | 10869 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
10870 | } |
10871 | ||
80626a55 DE |
10872 | /* This function is mapped across the sections and remembers the offset and |
10873 | size of each of the DWO debugging sections we are interested in. */ | |
10874 | ||
10875 | static void | |
10876 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
10877 | { | |
9a3c8263 | 10878 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
10879 | const struct dwop_section_names *names = &dwop_section_names; |
10880 | ||
10881 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
10882 | { | |
049412e3 | 10883 | dwo_sections->abbrev.s.section = sectp; |
80626a55 DE |
10884 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); |
10885 | } | |
10886 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
10887 | { | |
049412e3 | 10888 | dwo_sections->info.s.section = sectp; |
80626a55 DE |
10889 | dwo_sections->info.size = bfd_get_section_size (sectp); |
10890 | } | |
10891 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
10892 | { | |
049412e3 | 10893 | dwo_sections->line.s.section = sectp; |
80626a55 DE |
10894 | dwo_sections->line.size = bfd_get_section_size (sectp); |
10895 | } | |
10896 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
10897 | { | |
049412e3 | 10898 | dwo_sections->loc.s.section = sectp; |
80626a55 DE |
10899 | dwo_sections->loc.size = bfd_get_section_size (sectp); |
10900 | } | |
10901 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
10902 | { | |
049412e3 | 10903 | dwo_sections->macinfo.s.section = sectp; |
80626a55 DE |
10904 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); |
10905 | } | |
10906 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
10907 | { | |
049412e3 | 10908 | dwo_sections->macro.s.section = sectp; |
80626a55 DE |
10909 | dwo_sections->macro.size = bfd_get_section_size (sectp); |
10910 | } | |
10911 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
10912 | { | |
049412e3 | 10913 | dwo_sections->str.s.section = sectp; |
80626a55 DE |
10914 | dwo_sections->str.size = bfd_get_section_size (sectp); |
10915 | } | |
10916 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
10917 | { | |
049412e3 | 10918 | dwo_sections->str_offsets.s.section = sectp; |
80626a55 DE |
10919 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); |
10920 | } | |
10921 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
10922 | { | |
10923 | struct dwarf2_section_info type_section; | |
10924 | ||
10925 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 10926 | type_section.s.section = sectp; |
80626a55 DE |
10927 | type_section.size = bfd_get_section_size (sectp); |
10928 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
10929 | &type_section); | |
10930 | } | |
10931 | } | |
10932 | ||
ab5088bf | 10933 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 10934 | by PER_CU. This is for the non-DWP case. |
80626a55 | 10935 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
10936 | |
10937 | static struct dwo_file * | |
0ac5b59e DE |
10938 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
10939 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
10940 | { |
10941 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 10942 | struct dwo_file *dwo_file; |
3019eac3 DE |
10943 | struct cleanup *cleanups; |
10944 | ||
192b62ce | 10945 | gdb_bfd_ref_ptr dbfd (open_dwo_file (dwo_name, comp_dir)); |
80626a55 DE |
10946 | if (dbfd == NULL) |
10947 | { | |
b4f54984 | 10948 | if (dwarf_read_debug) |
80626a55 DE |
10949 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
10950 | return NULL; | |
10951 | } | |
10952 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
10953 | dwo_file->dwo_name = dwo_name; |
10954 | dwo_file->comp_dir = comp_dir; | |
192b62ce | 10955 | dwo_file->dbfd = dbfd.release (); |
3019eac3 DE |
10956 | |
10957 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
10958 | ||
192b62ce TT |
10959 | bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections, |
10960 | &dwo_file->sections); | |
3019eac3 | 10961 | |
33c5cd75 | 10962 | create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus); |
3019eac3 | 10963 | |
78d4d2c5 JK |
10964 | create_debug_types_hash_table (dwo_file, dwo_file->sections.types, |
10965 | dwo_file->tus); | |
3019eac3 DE |
10966 | |
10967 | discard_cleanups (cleanups); | |
10968 | ||
b4f54984 | 10969 | if (dwarf_read_debug) |
80626a55 DE |
10970 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
10971 | ||
3019eac3 DE |
10972 | return dwo_file; |
10973 | } | |
10974 | ||
80626a55 | 10975 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
10976 | size of each of the DWP debugging sections common to version 1 and 2 that |
10977 | we are interested in. */ | |
3019eac3 | 10978 | |
80626a55 | 10979 | static void |
73869dc2 DE |
10980 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
10981 | void *dwp_file_ptr) | |
3019eac3 | 10982 | { |
9a3c8263 | 10983 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
10984 | const struct dwop_section_names *names = &dwop_section_names; |
10985 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 10986 | |
80626a55 | 10987 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 10988 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
10989 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
10990 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 10991 | |
80626a55 DE |
10992 | /* Look for specific sections that we need. */ |
10993 | if (section_is_p (sectp->name, &names->str_dwo)) | |
10994 | { | |
049412e3 | 10995 | dwp_file->sections.str.s.section = sectp; |
80626a55 DE |
10996 | dwp_file->sections.str.size = bfd_get_section_size (sectp); |
10997 | } | |
10998 | else if (section_is_p (sectp->name, &names->cu_index)) | |
10999 | { | |
049412e3 | 11000 | dwp_file->sections.cu_index.s.section = sectp; |
80626a55 DE |
11001 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); |
11002 | } | |
11003 | else if (section_is_p (sectp->name, &names->tu_index)) | |
11004 | { | |
049412e3 | 11005 | dwp_file->sections.tu_index.s.section = sectp; |
80626a55 DE |
11006 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); |
11007 | } | |
11008 | } | |
3019eac3 | 11009 | |
73869dc2 DE |
11010 | /* This function is mapped across the sections and remembers the offset and |
11011 | size of each of the DWP version 2 debugging sections that we are interested | |
11012 | in. This is split into a separate function because we don't know if we | |
11013 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
11014 | ||
11015 | static void | |
11016 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
11017 | { | |
9a3c8263 | 11018 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
11019 | const struct dwop_section_names *names = &dwop_section_names; |
11020 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
11021 | ||
11022 | /* Record the ELF section number for later lookup: this is what the | |
11023 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
11024 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
11025 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
11026 | ||
11027 | /* Look for specific sections that we need. */ | |
11028 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11029 | { | |
049412e3 | 11030 | dwp_file->sections.abbrev.s.section = sectp; |
73869dc2 DE |
11031 | dwp_file->sections.abbrev.size = bfd_get_section_size (sectp); |
11032 | } | |
11033 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
11034 | { | |
049412e3 | 11035 | dwp_file->sections.info.s.section = sectp; |
73869dc2 DE |
11036 | dwp_file->sections.info.size = bfd_get_section_size (sectp); |
11037 | } | |
11038 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11039 | { | |
049412e3 | 11040 | dwp_file->sections.line.s.section = sectp; |
73869dc2 DE |
11041 | dwp_file->sections.line.size = bfd_get_section_size (sectp); |
11042 | } | |
11043 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11044 | { | |
049412e3 | 11045 | dwp_file->sections.loc.s.section = sectp; |
73869dc2 DE |
11046 | dwp_file->sections.loc.size = bfd_get_section_size (sectp); |
11047 | } | |
11048 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11049 | { | |
049412e3 | 11050 | dwp_file->sections.macinfo.s.section = sectp; |
73869dc2 DE |
11051 | dwp_file->sections.macinfo.size = bfd_get_section_size (sectp); |
11052 | } | |
11053 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11054 | { | |
049412e3 | 11055 | dwp_file->sections.macro.s.section = sectp; |
73869dc2 DE |
11056 | dwp_file->sections.macro.size = bfd_get_section_size (sectp); |
11057 | } | |
11058 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11059 | { | |
049412e3 | 11060 | dwp_file->sections.str_offsets.s.section = sectp; |
73869dc2 DE |
11061 | dwp_file->sections.str_offsets.size = bfd_get_section_size (sectp); |
11062 | } | |
11063 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
11064 | { | |
049412e3 | 11065 | dwp_file->sections.types.s.section = sectp; |
73869dc2 DE |
11066 | dwp_file->sections.types.size = bfd_get_section_size (sectp); |
11067 | } | |
11068 | } | |
11069 | ||
80626a55 | 11070 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11071 | |
80626a55 DE |
11072 | static hashval_t |
11073 | hash_dwp_loaded_cutus (const void *item) | |
11074 | { | |
9a3c8263 | 11075 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 11076 | |
80626a55 DE |
11077 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
11078 | return dwo_unit->signature; | |
3019eac3 DE |
11079 | } |
11080 | ||
80626a55 | 11081 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11082 | |
80626a55 DE |
11083 | static int |
11084 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 11085 | { |
9a3c8263 SM |
11086 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
11087 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 11088 | |
80626a55 DE |
11089 | return dua->signature == dub->signature; |
11090 | } | |
3019eac3 | 11091 | |
80626a55 | 11092 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 11093 | |
80626a55 DE |
11094 | static htab_t |
11095 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
11096 | { | |
11097 | return htab_create_alloc_ex (3, | |
11098 | hash_dwp_loaded_cutus, | |
11099 | eq_dwp_loaded_cutus, | |
11100 | NULL, | |
11101 | &objfile->objfile_obstack, | |
11102 | hashtab_obstack_allocate, | |
11103 | dummy_obstack_deallocate); | |
11104 | } | |
3019eac3 | 11105 | |
ab5088bf DE |
11106 | /* Try to open DWP file FILE_NAME. |
11107 | The result is the bfd handle of the file. | |
11108 | If there is a problem finding or opening the file, return NULL. | |
11109 | Upon success, the canonicalized path of the file is stored in the bfd, | |
11110 | same as symfile_bfd_open. */ | |
11111 | ||
192b62ce | 11112 | static gdb_bfd_ref_ptr |
ab5088bf DE |
11113 | open_dwp_file (const char *file_name) |
11114 | { | |
192b62ce TT |
11115 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (file_name, 1 /*is_dwp*/, |
11116 | 1 /*search_cwd*/)); | |
6ac97d4c DE |
11117 | if (abfd != NULL) |
11118 | return abfd; | |
11119 | ||
11120 | /* Work around upstream bug 15652. | |
11121 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
11122 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
11123 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
11124 | of the executable's path may have discarded the needed info. | |
11125 | [IWBN if the dwp file name was recorded in the executable, akin to | |
11126 | .gnu_debuglink, but that doesn't exist yet.] | |
11127 | Strip the directory from FILE_NAME and search again. */ | |
11128 | if (*debug_file_directory != '\0') | |
11129 | { | |
11130 | /* Don't implicitly search the current directory here. | |
11131 | If the user wants to search "." to handle this case, | |
11132 | it must be added to debug-file-directory. */ | |
11133 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
11134 | 0 /*search_cwd*/); | |
11135 | } | |
11136 | ||
11137 | return NULL; | |
ab5088bf DE |
11138 | } |
11139 | ||
80626a55 DE |
11140 | /* Initialize the use of the DWP file for the current objfile. |
11141 | By convention the name of the DWP file is ${objfile}.dwp. | |
11142 | The result is NULL if it can't be found. */ | |
a766d390 | 11143 | |
80626a55 | 11144 | static struct dwp_file * |
ab5088bf | 11145 | open_and_init_dwp_file (void) |
80626a55 DE |
11146 | { |
11147 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11148 | struct dwp_file *dwp_file; | |
80626a55 | 11149 | |
82bf32bc JK |
11150 | /* Try to find first .dwp for the binary file before any symbolic links |
11151 | resolving. */ | |
6c447423 DE |
11152 | |
11153 | /* If the objfile is a debug file, find the name of the real binary | |
11154 | file and get the name of dwp file from there. */ | |
d721ba37 | 11155 | std::string dwp_name; |
6c447423 DE |
11156 | if (objfile->separate_debug_objfile_backlink != NULL) |
11157 | { | |
11158 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
11159 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 11160 | |
d721ba37 | 11161 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
11162 | } |
11163 | else | |
d721ba37 PA |
11164 | dwp_name = objfile->original_name; |
11165 | ||
11166 | dwp_name += ".dwp"; | |
80626a55 | 11167 | |
d721ba37 | 11168 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwp_name.c_str ())); |
82bf32bc JK |
11169 | if (dbfd == NULL |
11170 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
11171 | { | |
11172 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
11173 | dwp_name = objfile_name (objfile); |
11174 | dwp_name += ".dwp"; | |
11175 | dbfd = open_dwp_file (dwp_name.c_str ()); | |
82bf32bc JK |
11176 | } |
11177 | ||
80626a55 DE |
11178 | if (dbfd == NULL) |
11179 | { | |
b4f54984 | 11180 | if (dwarf_read_debug) |
d721ba37 | 11181 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
80626a55 | 11182 | return NULL; |
3019eac3 | 11183 | } |
80626a55 | 11184 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
192b62ce TT |
11185 | dwp_file->name = bfd_get_filename (dbfd.get ()); |
11186 | dwp_file->dbfd = dbfd.release (); | |
c906108c | 11187 | |
80626a55 | 11188 | /* +1: section 0 is unused */ |
192b62ce | 11189 | dwp_file->num_sections = bfd_count_sections (dwp_file->dbfd) + 1; |
80626a55 DE |
11190 | dwp_file->elf_sections = |
11191 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
11192 | dwp_file->num_sections, asection *); | |
11193 | ||
192b62ce TT |
11194 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_common_dwp_sections, |
11195 | dwp_file); | |
80626a55 DE |
11196 | |
11197 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
11198 | ||
11199 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
11200 | ||
73869dc2 DE |
11201 | /* The DWP file version is stored in the hash table. Oh well. */ |
11202 | if (dwp_file->cus->version != dwp_file->tus->version) | |
11203 | { | |
11204 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 11205 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 11206 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
11207 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
11208 | " TU version %s [in DWP file %s]"), | |
11209 | pulongest (dwp_file->cus->version), | |
d721ba37 | 11210 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 DE |
11211 | } |
11212 | dwp_file->version = dwp_file->cus->version; | |
11213 | ||
11214 | if (dwp_file->version == 2) | |
192b62ce TT |
11215 | bfd_map_over_sections (dwp_file->dbfd, dwarf2_locate_v2_dwp_sections, |
11216 | dwp_file); | |
73869dc2 | 11217 | |
19ac8c2e DE |
11218 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
11219 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 11220 | |
b4f54984 | 11221 | if (dwarf_read_debug) |
80626a55 DE |
11222 | { |
11223 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
11224 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
11225 | " %s CUs, %s TUs\n", |
11226 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
11227 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
11228 | } |
11229 | ||
11230 | return dwp_file; | |
3019eac3 | 11231 | } |
c906108c | 11232 | |
ab5088bf DE |
11233 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
11234 | ||
11235 | static struct dwp_file * | |
11236 | get_dwp_file (void) | |
11237 | { | |
11238 | if (! dwarf2_per_objfile->dwp_checked) | |
11239 | { | |
11240 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
11241 | dwarf2_per_objfile->dwp_checked = 1; | |
11242 | } | |
11243 | return dwarf2_per_objfile->dwp_file; | |
11244 | } | |
11245 | ||
80626a55 DE |
11246 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
11247 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
11248 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 11249 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
11250 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
11251 | ||
11252 | This is called, for example, when wanting to read a variable with a | |
11253 | complex location. Therefore we don't want to do file i/o for every call. | |
11254 | Therefore we don't want to look for a DWO file on every call. | |
11255 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
11256 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
11257 | for a DWO file. | |
11258 | ||
1c658ad5 | 11259 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 11260 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 11261 | |
3019eac3 | 11262 | static struct dwo_unit * |
80626a55 DE |
11263 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
11264 | const char *dwo_name, const char *comp_dir, | |
11265 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
11266 | { |
11267 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
11268 | const char *kind = is_debug_types ? "TU" : "CU"; |
11269 | void **dwo_file_slot; | |
3019eac3 | 11270 | struct dwo_file *dwo_file; |
80626a55 | 11271 | struct dwp_file *dwp_file; |
cb1df416 | 11272 | |
6a506a2d DE |
11273 | /* First see if there's a DWP file. |
11274 | If we have a DWP file but didn't find the DWO inside it, don't | |
11275 | look for the original DWO file. It makes gdb behave differently | |
11276 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 11277 | |
ab5088bf | 11278 | dwp_file = get_dwp_file (); |
80626a55 | 11279 | if (dwp_file != NULL) |
cf2c3c16 | 11280 | { |
80626a55 DE |
11281 | const struct dwp_hash_table *dwp_htab = |
11282 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11283 | ||
11284 | if (dwp_htab != NULL) | |
11285 | { | |
11286 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
11287 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
11288 | signature, is_debug_types); | |
80626a55 DE |
11289 | |
11290 | if (dwo_cutu != NULL) | |
11291 | { | |
b4f54984 | 11292 | if (dwarf_read_debug) |
80626a55 DE |
11293 | { |
11294 | fprintf_unfiltered (gdb_stdlog, | |
11295 | "Virtual DWO %s %s found: @%s\n", | |
11296 | kind, hex_string (signature), | |
11297 | host_address_to_string (dwo_cutu)); | |
11298 | } | |
11299 | return dwo_cutu; | |
11300 | } | |
11301 | } | |
11302 | } | |
6a506a2d | 11303 | else |
80626a55 | 11304 | { |
6a506a2d | 11305 | /* No DWP file, look for the DWO file. */ |
80626a55 | 11306 | |
6a506a2d DE |
11307 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
11308 | if (*dwo_file_slot == NULL) | |
80626a55 | 11309 | { |
6a506a2d DE |
11310 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
11311 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 11312 | } |
6a506a2d | 11313 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 11314 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 11315 | |
6a506a2d | 11316 | if (dwo_file != NULL) |
19c3d4c9 | 11317 | { |
6a506a2d DE |
11318 | struct dwo_unit *dwo_cutu = NULL; |
11319 | ||
11320 | if (is_debug_types && dwo_file->tus) | |
11321 | { | |
11322 | struct dwo_unit find_dwo_cutu; | |
11323 | ||
11324 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11325 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
11326 | dwo_cutu |
11327 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 11328 | } |
33c5cd75 | 11329 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 11330 | { |
33c5cd75 DB |
11331 | struct dwo_unit find_dwo_cutu; |
11332 | ||
11333 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
11334 | find_dwo_cutu.signature = signature; | |
11335 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
11336 | &find_dwo_cutu); | |
6a506a2d DE |
11337 | } |
11338 | ||
11339 | if (dwo_cutu != NULL) | |
11340 | { | |
b4f54984 | 11341 | if (dwarf_read_debug) |
6a506a2d DE |
11342 | { |
11343 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
11344 | kind, dwo_name, hex_string (signature), | |
11345 | host_address_to_string (dwo_cutu)); | |
11346 | } | |
11347 | return dwo_cutu; | |
80626a55 DE |
11348 | } |
11349 | } | |
2e276125 | 11350 | } |
9cdd5dbd | 11351 | |
80626a55 DE |
11352 | /* We didn't find it. This could mean a dwo_id mismatch, or |
11353 | someone deleted the DWO/DWP file, or the search path isn't set up | |
11354 | correctly to find the file. */ | |
11355 | ||
b4f54984 | 11356 | if (dwarf_read_debug) |
80626a55 DE |
11357 | { |
11358 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
11359 | kind, dwo_name, hex_string (signature)); | |
11360 | } | |
3019eac3 | 11361 | |
6656a72d DE |
11362 | /* This is a warning and not a complaint because it can be caused by |
11363 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
11364 | { |
11365 | /* Print the name of the DWP file if we looked there, helps the user | |
11366 | better diagnose the problem. */ | |
11367 | char *dwp_text = NULL; | |
11368 | struct cleanup *cleanups; | |
11369 | ||
11370 | if (dwp_file != NULL) | |
11371 | dwp_text = xstrprintf (" [in DWP file %s]", lbasename (dwp_file->name)); | |
11372 | cleanups = make_cleanup (xfree, dwp_text); | |
11373 | ||
11374 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x" | |
11375 | " [in module %s]"), | |
11376 | kind, dwo_name, hex_string (signature), | |
11377 | dwp_text != NULL ? dwp_text : "", | |
11378 | this_unit->is_debug_types ? "TU" : "CU", | |
9c541725 | 11379 | to_underlying (this_unit->sect_off), objfile_name (objfile)); |
43942612 DE |
11380 | |
11381 | do_cleanups (cleanups); | |
11382 | } | |
3019eac3 | 11383 | return NULL; |
5fb290d7 DJ |
11384 | } |
11385 | ||
80626a55 DE |
11386 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
11387 | See lookup_dwo_cutu_unit for details. */ | |
11388 | ||
11389 | static struct dwo_unit * | |
11390 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
11391 | const char *dwo_name, const char *comp_dir, | |
11392 | ULONGEST signature) | |
11393 | { | |
11394 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
11395 | } | |
11396 | ||
11397 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
11398 | See lookup_dwo_cutu_unit for details. */ | |
11399 | ||
11400 | static struct dwo_unit * | |
11401 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
11402 | const char *dwo_name, const char *comp_dir) | |
11403 | { | |
11404 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
11405 | } | |
11406 | ||
89e63ee4 DE |
11407 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
11408 | ||
11409 | static int | |
11410 | queue_and_load_dwo_tu (void **slot, void *info) | |
11411 | { | |
11412 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
11413 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
11414 | ULONGEST signature = dwo_unit->signature; | |
11415 | struct signatured_type *sig_type = | |
11416 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
11417 | ||
11418 | if (sig_type != NULL) | |
11419 | { | |
11420 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
11421 | ||
11422 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
11423 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
11424 | while processing PER_CU. */ | |
11425 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
11426 | load_full_type_unit (sig_cu); | |
11427 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
11428 | } | |
11429 | ||
11430 | return 1; | |
11431 | } | |
11432 | ||
11433 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
11434 | The DWO may have the only definition of the type, though it may not be | |
11435 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
11436 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
11437 | ||
11438 | static void | |
11439 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
11440 | { | |
11441 | struct dwo_unit *dwo_unit; | |
11442 | struct dwo_file *dwo_file; | |
11443 | ||
11444 | gdb_assert (!per_cu->is_debug_types); | |
11445 | gdb_assert (get_dwp_file () == NULL); | |
11446 | gdb_assert (per_cu->cu != NULL); | |
11447 | ||
11448 | dwo_unit = per_cu->cu->dwo_unit; | |
11449 | gdb_assert (dwo_unit != NULL); | |
11450 | ||
11451 | dwo_file = dwo_unit->dwo_file; | |
11452 | if (dwo_file->tus != NULL) | |
11453 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
11454 | } | |
11455 | ||
3019eac3 DE |
11456 | /* Free all resources associated with DWO_FILE. |
11457 | Close the DWO file and munmap the sections. | |
11458 | All memory should be on the objfile obstack. */ | |
348e048f DE |
11459 | |
11460 | static void | |
3019eac3 | 11461 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 11462 | { |
348e048f | 11463 | |
5c6fa7ab | 11464 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 11465 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 11466 | |
3019eac3 DE |
11467 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
11468 | } | |
348e048f | 11469 | |
3019eac3 | 11470 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 11471 | |
3019eac3 DE |
11472 | static void |
11473 | free_dwo_file_cleanup (void *arg) | |
11474 | { | |
11475 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
11476 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 11477 | |
3019eac3 DE |
11478 | free_dwo_file (dwo_file, objfile); |
11479 | } | |
348e048f | 11480 | |
3019eac3 | 11481 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 11482 | |
3019eac3 DE |
11483 | static int |
11484 | free_dwo_file_from_slot (void **slot, void *info) | |
11485 | { | |
11486 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
11487 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 11488 | |
3019eac3 | 11489 | free_dwo_file (dwo_file, objfile); |
348e048f | 11490 | |
3019eac3 DE |
11491 | return 1; |
11492 | } | |
348e048f | 11493 | |
3019eac3 | 11494 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 11495 | |
3019eac3 DE |
11496 | static void |
11497 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
11498 | { | |
11499 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 11500 | } |
3019eac3 DE |
11501 | \f |
11502 | /* Read in various DIEs. */ | |
348e048f | 11503 | |
d389af10 JK |
11504 | /* qsort helper for inherit_abstract_dies. */ |
11505 | ||
11506 | static int | |
11507 | unsigned_int_compar (const void *ap, const void *bp) | |
11508 | { | |
11509 | unsigned int a = *(unsigned int *) ap; | |
11510 | unsigned int b = *(unsigned int *) bp; | |
11511 | ||
11512 | return (a > b) - (b > a); | |
11513 | } | |
11514 | ||
11515 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
11516 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
11517 | already referenced by DW_AT_abstract_origin from the children of the | |
11518 | current DIE. */ | |
d389af10 JK |
11519 | |
11520 | static void | |
11521 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
11522 | { | |
11523 | struct die_info *child_die; | |
11524 | unsigned die_children_count; | |
11525 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
11526 | sect_offset *offsets; |
11527 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
11528 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
11529 | struct die_info *origin_die; | |
11530 | /* Iterator of the ORIGIN_DIE children. */ | |
11531 | struct die_info *origin_child_die; | |
11532 | struct cleanup *cleanups; | |
11533 | struct attribute *attr; | |
cd02d79d PA |
11534 | struct dwarf2_cu *origin_cu; |
11535 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
11536 | |
11537 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
11538 | if (!attr) | |
11539 | return; | |
11540 | ||
cd02d79d PA |
11541 | /* Note that following die references may follow to a die in a |
11542 | different cu. */ | |
11543 | ||
11544 | origin_cu = cu; | |
11545 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
11546 | ||
11547 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
11548 | symbols in. */ | |
11549 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
11550 | origin_cu->list_in_scope = cu->list_in_scope; | |
11551 | ||
edb3359d DJ |
11552 | if (die->tag != origin_die->tag |
11553 | && !(die->tag == DW_TAG_inlined_subroutine | |
11554 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11555 | complaint (&symfile_complaints, |
11556 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
9c541725 PA |
11557 | to_underlying (die->sect_off), |
11558 | to_underlying (origin_die->sect_off)); | |
d389af10 JK |
11559 | |
11560 | child_die = die->child; | |
11561 | die_children_count = 0; | |
11562 | while (child_die && child_die->tag) | |
11563 | { | |
11564 | child_die = sibling_die (child_die); | |
11565 | die_children_count++; | |
11566 | } | |
8d749320 | 11567 | offsets = XNEWVEC (sect_offset, die_children_count); |
d389af10 JK |
11568 | cleanups = make_cleanup (xfree, offsets); |
11569 | ||
11570 | offsets_end = offsets; | |
3ea89b92 PMR |
11571 | for (child_die = die->child; |
11572 | child_die && child_die->tag; | |
11573 | child_die = sibling_die (child_die)) | |
11574 | { | |
11575 | struct die_info *child_origin_die; | |
11576 | struct dwarf2_cu *child_origin_cu; | |
11577 | ||
11578 | /* We are trying to process concrete instance entries: | |
216f72a1 | 11579 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
11580 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
11581 | present in the abstract instance but not referenced in the concrete | |
11582 | one. */ | |
216f72a1 JK |
11583 | if (child_die->tag == DW_TAG_call_site |
11584 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
11585 | continue; |
11586 | ||
c38f313d DJ |
11587 | /* For each CHILD_DIE, find the corresponding child of |
11588 | ORIGIN_DIE. If there is more than one layer of | |
11589 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
11590 | but GCC versions at least through 4.4 generate this (GCC PR | |
11591 | 40573). */ | |
3ea89b92 PMR |
11592 | child_origin_die = child_die; |
11593 | child_origin_cu = cu; | |
c38f313d DJ |
11594 | while (1) |
11595 | { | |
cd02d79d PA |
11596 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
11597 | child_origin_cu); | |
c38f313d DJ |
11598 | if (attr == NULL) |
11599 | break; | |
cd02d79d PA |
11600 | child_origin_die = follow_die_ref (child_origin_die, attr, |
11601 | &child_origin_cu); | |
c38f313d DJ |
11602 | } |
11603 | ||
d389af10 JK |
11604 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
11605 | counterpart may exist. */ | |
c38f313d | 11606 | if (child_origin_die != child_die) |
d389af10 | 11607 | { |
edb3359d DJ |
11608 | if (child_die->tag != child_origin_die->tag |
11609 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
11610 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
11611 | complaint (&symfile_complaints, |
11612 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
11613 | "different tags"), |
11614 | to_underlying (child_die->sect_off), | |
11615 | to_underlying (child_origin_die->sect_off)); | |
c38f313d DJ |
11616 | if (child_origin_die->parent != origin_die) |
11617 | complaint (&symfile_complaints, | |
11618 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
9c541725 PA |
11619 | "different parents"), |
11620 | to_underlying (child_die->sect_off), | |
11621 | to_underlying (child_origin_die->sect_off)); | |
c38f313d | 11622 | else |
9c541725 | 11623 | *offsets_end++ = child_origin_die->sect_off; |
d389af10 | 11624 | } |
d389af10 JK |
11625 | } |
11626 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
11627 | unsigned_int_compar); | |
11628 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 11629 | if (offsetp[-1] == *offsetp) |
3e43a32a MS |
11630 | complaint (&symfile_complaints, |
11631 | _("Multiple children of DIE 0x%x refer " | |
11632 | "to DIE 0x%x as their abstract origin"), | |
9c541725 | 11633 | to_underlying (die->sect_off), to_underlying (*offsetp)); |
d389af10 JK |
11634 | |
11635 | offsetp = offsets; | |
11636 | origin_child_die = origin_die->child; | |
11637 | while (origin_child_die && origin_child_die->tag) | |
11638 | { | |
11639 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 11640 | while (offsetp < offsets_end |
9c541725 | 11641 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 11642 | offsetp++; |
b64f50a1 | 11643 | if (offsetp >= offsets_end |
9c541725 | 11644 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 11645 | { |
adde2bff DE |
11646 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
11647 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
11648 | This can happen with mutually referenced abstract_origins. | |
11649 | PR 16581. */ | |
11650 | if (!origin_child_die->in_process) | |
11651 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
11652 | } |
11653 | origin_child_die = sibling_die (origin_child_die); | |
11654 | } | |
cd02d79d | 11655 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
11656 | |
11657 | do_cleanups (cleanups); | |
11658 | } | |
11659 | ||
c906108c | 11660 | static void |
e7c27a73 | 11661 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11662 | { |
e7c27a73 | 11663 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11664 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11665 | struct context_stack *newobj; |
c906108c SS |
11666 | CORE_ADDR lowpc; |
11667 | CORE_ADDR highpc; | |
11668 | struct die_info *child_die; | |
edb3359d | 11669 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 11670 | const char *name; |
e142c38c | 11671 | CORE_ADDR baseaddr; |
801e3a5b | 11672 | struct block *block; |
edb3359d | 11673 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
11674 | VEC (symbolp) *template_args = NULL; |
11675 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
11676 | |
11677 | if (inlined_func) | |
11678 | { | |
11679 | /* If we do not have call site information, we can't show the | |
11680 | caller of this inlined function. That's too confusing, so | |
11681 | only use the scope for local variables. */ | |
11682 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
11683 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
11684 | if (call_line == NULL || call_file == NULL) | |
11685 | { | |
11686 | read_lexical_block_scope (die, cu); | |
11687 | return; | |
11688 | } | |
11689 | } | |
c906108c | 11690 | |
e142c38c DJ |
11691 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
11692 | ||
94af9270 | 11693 | name = dwarf2_name (die, cu); |
c906108c | 11694 | |
e8d05480 JB |
11695 | /* Ignore functions with missing or empty names. These are actually |
11696 | illegal according to the DWARF standard. */ | |
11697 | if (name == NULL) | |
11698 | { | |
11699 | complaint (&symfile_complaints, | |
b64f50a1 | 11700 | _("missing name for subprogram DIE at %d"), |
9c541725 | 11701 | to_underlying (die->sect_off)); |
e8d05480 JB |
11702 | return; |
11703 | } | |
11704 | ||
11705 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 11706 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 11707 | <= PC_BOUNDS_INVALID) |
e8d05480 | 11708 | { |
ae4d0c03 PM |
11709 | attr = dwarf2_attr (die, DW_AT_external, cu); |
11710 | if (!attr || !DW_UNSND (attr)) | |
11711 | complaint (&symfile_complaints, | |
3e43a32a MS |
11712 | _("cannot get low and high bounds " |
11713 | "for subprogram DIE at %d"), | |
9c541725 | 11714 | to_underlying (die->sect_off)); |
e8d05480 JB |
11715 | return; |
11716 | } | |
c906108c | 11717 | |
3e29f34a MR |
11718 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11719 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 11720 | |
34eaf542 TT |
11721 | /* If we have any template arguments, then we must allocate a |
11722 | different sort of symbol. */ | |
11723 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
11724 | { | |
11725 | if (child_die->tag == DW_TAG_template_type_param | |
11726 | || child_die->tag == DW_TAG_template_value_param) | |
11727 | { | |
e623cf5d | 11728 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
11729 | templ_func->base.is_cplus_template_function = 1; |
11730 | break; | |
11731 | } | |
11732 | } | |
11733 | ||
fe978cb0 PA |
11734 | newobj = push_context (0, lowpc); |
11735 | newobj->name = new_symbol_full (die, read_type_die (die, cu), cu, | |
34eaf542 | 11736 | (struct symbol *) templ_func); |
4c2df51b | 11737 | |
4cecd739 DJ |
11738 | /* If there is a location expression for DW_AT_frame_base, record |
11739 | it. */ | |
e142c38c | 11740 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 11741 | if (attr) |
fe978cb0 | 11742 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 11743 | |
63e43d3a PMR |
11744 | /* If there is a location for the static link, record it. */ |
11745 | newobj->static_link = NULL; | |
11746 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
11747 | if (attr) | |
11748 | { | |
224c3ddb SM |
11749 | newobj->static_link |
11750 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
63e43d3a PMR |
11751 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link); |
11752 | } | |
11753 | ||
e142c38c | 11754 | cu->list_in_scope = &local_symbols; |
c906108c | 11755 | |
639d11d3 | 11756 | if (die->child != NULL) |
c906108c | 11757 | { |
639d11d3 | 11758 | child_die = die->child; |
c906108c SS |
11759 | while (child_die && child_die->tag) |
11760 | { | |
34eaf542 TT |
11761 | if (child_die->tag == DW_TAG_template_type_param |
11762 | || child_die->tag == DW_TAG_template_value_param) | |
11763 | { | |
11764 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11765 | ||
f1078f66 DJ |
11766 | if (arg != NULL) |
11767 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11768 | } |
11769 | else | |
11770 | process_die (child_die, cu); | |
c906108c SS |
11771 | child_die = sibling_die (child_die); |
11772 | } | |
11773 | } | |
11774 | ||
d389af10 JK |
11775 | inherit_abstract_dies (die, cu); |
11776 | ||
4a811a97 UW |
11777 | /* If we have a DW_AT_specification, we might need to import using |
11778 | directives from the context of the specification DIE. See the | |
11779 | comment in determine_prefix. */ | |
11780 | if (cu->language == language_cplus | |
11781 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
11782 | { | |
11783 | struct dwarf2_cu *spec_cu = cu; | |
11784 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
11785 | ||
11786 | while (spec_die) | |
11787 | { | |
11788 | child_die = spec_die->child; | |
11789 | while (child_die && child_die->tag) | |
11790 | { | |
11791 | if (child_die->tag == DW_TAG_imported_module) | |
11792 | process_die (child_die, spec_cu); | |
11793 | child_die = sibling_die (child_die); | |
11794 | } | |
11795 | ||
11796 | /* In some cases, GCC generates specification DIEs that | |
11797 | themselves contain DW_AT_specification attributes. */ | |
11798 | spec_die = die_specification (spec_die, &spec_cu); | |
11799 | } | |
11800 | } | |
11801 | ||
fe978cb0 | 11802 | newobj = pop_context (); |
c906108c | 11803 | /* Make a block for the local symbols within. */ |
fe978cb0 | 11804 | block = finish_block (newobj->name, &local_symbols, newobj->old_blocks, |
63e43d3a | 11805 | newobj->static_link, lowpc, highpc); |
801e3a5b | 11806 | |
df8a16a1 | 11807 | /* For C++, set the block's scope. */ |
45280282 IB |
11808 | if ((cu->language == language_cplus |
11809 | || cu->language == language_fortran | |
c44af4eb TT |
11810 | || cu->language == language_d |
11811 | || cu->language == language_rust) | |
4d4ec4e5 | 11812 | && cu->processing_has_namespace_info) |
195a3f6c TT |
11813 | block_set_scope (block, determine_prefix (die, cu), |
11814 | &objfile->objfile_obstack); | |
df8a16a1 | 11815 | |
801e3a5b JB |
11816 | /* If we have address ranges, record them. */ |
11817 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 11818 | |
fe978cb0 | 11819 | gdbarch_make_symbol_special (gdbarch, newobj->name, objfile); |
3e29f34a | 11820 | |
34eaf542 TT |
11821 | /* Attach template arguments to function. */ |
11822 | if (! VEC_empty (symbolp, template_args)) | |
11823 | { | |
11824 | gdb_assert (templ_func != NULL); | |
11825 | ||
11826 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
11827 | templ_func->template_arguments | |
8d749320 SM |
11828 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
11829 | templ_func->n_template_arguments); | |
34eaf542 TT |
11830 | memcpy (templ_func->template_arguments, |
11831 | VEC_address (symbolp, template_args), | |
11832 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
11833 | VEC_free (symbolp, template_args); | |
11834 | } | |
11835 | ||
208d8187 JB |
11836 | /* In C++, we can have functions nested inside functions (e.g., when |
11837 | a function declares a class that has methods). This means that | |
11838 | when we finish processing a function scope, we may need to go | |
11839 | back to building a containing block's symbol lists. */ | |
fe978cb0 | 11840 | local_symbols = newobj->locals; |
22cee43f | 11841 | local_using_directives = newobj->local_using_directives; |
208d8187 | 11842 | |
921e78cf JB |
11843 | /* If we've finished processing a top-level function, subsequent |
11844 | symbols go in the file symbol list. */ | |
11845 | if (outermost_context_p ()) | |
e142c38c | 11846 | cu->list_in_scope = &file_symbols; |
c906108c SS |
11847 | } |
11848 | ||
11849 | /* Process all the DIES contained within a lexical block scope. Start | |
11850 | a new scope, process the dies, and then close the scope. */ | |
11851 | ||
11852 | static void | |
e7c27a73 | 11853 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11854 | { |
e7c27a73 | 11855 | struct objfile *objfile = cu->objfile; |
3e29f34a | 11856 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 11857 | struct context_stack *newobj; |
c906108c SS |
11858 | CORE_ADDR lowpc, highpc; |
11859 | struct die_info *child_die; | |
e142c38c DJ |
11860 | CORE_ADDR baseaddr; |
11861 | ||
11862 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
11863 | |
11864 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
11865 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
11866 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 11867 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 11868 | describe ranges. */ |
e385593e JK |
11869 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
11870 | { | |
11871 | case PC_BOUNDS_NOT_PRESENT: | |
11872 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
11873 | there was no wrapping by that DW_TAG_lexical_block. | |
11874 | GCC does no longer produces such DWARF since GCC r224161. */ | |
11875 | for (child_die = die->child; | |
11876 | child_die != NULL && child_die->tag; | |
11877 | child_die = sibling_die (child_die)) | |
11878 | process_die (child_die, cu); | |
11879 | return; | |
11880 | case PC_BOUNDS_INVALID: | |
11881 | return; | |
11882 | } | |
3e29f34a MR |
11883 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
11884 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c SS |
11885 | |
11886 | push_context (0, lowpc); | |
639d11d3 | 11887 | if (die->child != NULL) |
c906108c | 11888 | { |
639d11d3 | 11889 | child_die = die->child; |
c906108c SS |
11890 | while (child_die && child_die->tag) |
11891 | { | |
e7c27a73 | 11892 | process_die (child_die, cu); |
c906108c SS |
11893 | child_die = sibling_die (child_die); |
11894 | } | |
11895 | } | |
3ea89b92 | 11896 | inherit_abstract_dies (die, cu); |
fe978cb0 | 11897 | newobj = pop_context (); |
c906108c | 11898 | |
22cee43f | 11899 | if (local_symbols != NULL || local_using_directives != NULL) |
c906108c | 11900 | { |
801e3a5b | 11901 | struct block *block |
63e43d3a | 11902 | = finish_block (0, &local_symbols, newobj->old_blocks, NULL, |
fe978cb0 | 11903 | newobj->start_addr, highpc); |
801e3a5b JB |
11904 | |
11905 | /* Note that recording ranges after traversing children, as we | |
11906 | do here, means that recording a parent's ranges entails | |
11907 | walking across all its children's ranges as they appear in | |
11908 | the address map, which is quadratic behavior. | |
11909 | ||
11910 | It would be nicer to record the parent's ranges before | |
11911 | traversing its children, simply overriding whatever you find | |
11912 | there. But since we don't even decide whether to create a | |
11913 | block until after we've traversed its children, that's hard | |
11914 | to do. */ | |
11915 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 11916 | } |
fe978cb0 | 11917 | local_symbols = newobj->locals; |
22cee43f | 11918 | local_using_directives = newobj->local_using_directives; |
c906108c SS |
11919 | } |
11920 | ||
216f72a1 | 11921 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
11922 | |
11923 | static void | |
11924 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11925 | { | |
11926 | struct objfile *objfile = cu->objfile; | |
11927 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
11928 | CORE_ADDR pc, baseaddr; | |
11929 | struct attribute *attr; | |
11930 | struct call_site *call_site, call_site_local; | |
11931 | void **slot; | |
11932 | int nparams; | |
11933 | struct die_info *child_die; | |
11934 | ||
11935 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
11936 | ||
216f72a1 JK |
11937 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
11938 | if (attr == NULL) | |
11939 | { | |
11940 | /* This was a pre-DWARF-5 GNU extension alias | |
11941 | for DW_AT_call_return_pc. */ | |
11942 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
11943 | } | |
96408a79 SA |
11944 | if (!attr) |
11945 | { | |
11946 | complaint (&symfile_complaints, | |
216f72a1 | 11947 | _("missing DW_AT_call_return_pc for DW_TAG_call_site " |
96408a79 | 11948 | "DIE 0x%x [in module %s]"), |
9c541725 | 11949 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
11950 | return; |
11951 | } | |
31aa7e4e | 11952 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 11953 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
11954 | |
11955 | if (cu->call_site_htab == NULL) | |
11956 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
11957 | NULL, &objfile->objfile_obstack, | |
11958 | hashtab_obstack_allocate, NULL); | |
11959 | call_site_local.pc = pc; | |
11960 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
11961 | if (*slot != NULL) | |
11962 | { | |
11963 | complaint (&symfile_complaints, | |
216f72a1 | 11964 | _("Duplicate PC %s for DW_TAG_call_site " |
96408a79 | 11965 | "DIE 0x%x [in module %s]"), |
9c541725 | 11966 | paddress (gdbarch, pc), to_underlying (die->sect_off), |
4262abfb | 11967 | objfile_name (objfile)); |
96408a79 SA |
11968 | return; |
11969 | } | |
11970 | ||
11971 | /* Count parameters at the caller. */ | |
11972 | ||
11973 | nparams = 0; | |
11974 | for (child_die = die->child; child_die && child_die->tag; | |
11975 | child_die = sibling_die (child_die)) | |
11976 | { | |
216f72a1 JK |
11977 | if (child_die->tag != DW_TAG_call_site_parameter |
11978 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
11979 | { |
11980 | complaint (&symfile_complaints, | |
216f72a1 JK |
11981 | _("Tag %d is not DW_TAG_call_site_parameter in " |
11982 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 | 11983 | child_die->tag, to_underlying (child_die->sect_off), |
4262abfb | 11984 | objfile_name (objfile)); |
96408a79 SA |
11985 | continue; |
11986 | } | |
11987 | ||
11988 | nparams++; | |
11989 | } | |
11990 | ||
224c3ddb SM |
11991 | call_site |
11992 | = ((struct call_site *) | |
11993 | obstack_alloc (&objfile->objfile_obstack, | |
11994 | sizeof (*call_site) | |
11995 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
11996 | *slot = call_site; |
11997 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
11998 | call_site->pc = pc; | |
11999 | ||
216f72a1 JK |
12000 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
12001 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
12002 | { |
12003 | struct die_info *func_die; | |
12004 | ||
12005 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
12006 | for (func_die = die->parent; | |
12007 | func_die && func_die->tag != DW_TAG_subprogram | |
12008 | && func_die->tag != DW_TAG_subroutine_type; | |
12009 | func_die = func_die->parent); | |
12010 | ||
216f72a1 JK |
12011 | /* DW_AT_call_all_calls is a superset |
12012 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 12013 | if (func_die |
216f72a1 | 12014 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 12015 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 12016 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
12017 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
12018 | { | |
12019 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
12020 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
12021 | both the initial caller containing the real return address PC and | |
12022 | the final callee containing the current PC of a chain of tail | |
12023 | calls do not need to have the tail call list complete. But any | |
12024 | function candidate for a virtual tail call frame searched via | |
12025 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
12026 | determined unambiguously. */ | |
12027 | } | |
12028 | else | |
12029 | { | |
12030 | struct type *func_type = NULL; | |
12031 | ||
12032 | if (func_die) | |
12033 | func_type = get_die_type (func_die, cu); | |
12034 | if (func_type != NULL) | |
12035 | { | |
12036 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
12037 | ||
12038 | /* Enlist this call site to the function. */ | |
12039 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
12040 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
12041 | } | |
12042 | else | |
12043 | complaint (&symfile_complaints, | |
216f72a1 | 12044 | _("Cannot find function owning DW_TAG_call_site " |
96408a79 | 12045 | "DIE 0x%x [in module %s]"), |
9c541725 | 12046 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12047 | } |
12048 | } | |
12049 | ||
216f72a1 JK |
12050 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
12051 | if (attr == NULL) | |
12052 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
12053 | if (attr == NULL) | |
12054 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 12055 | if (attr == NULL) |
216f72a1 JK |
12056 | { |
12057 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
12058 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12059 | } | |
96408a79 SA |
12060 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
12061 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
12062 | /* Keep NULL DWARF_BLOCK. */; | |
12063 | else if (attr_form_is_block (attr)) | |
12064 | { | |
12065 | struct dwarf2_locexpr_baton *dlbaton; | |
12066 | ||
8d749320 | 12067 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
12068 | dlbaton->data = DW_BLOCK (attr)->data; |
12069 | dlbaton->size = DW_BLOCK (attr)->size; | |
12070 | dlbaton->per_cu = cu->per_cu; | |
12071 | ||
12072 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
12073 | } | |
7771576e | 12074 | else if (attr_form_is_ref (attr)) |
96408a79 | 12075 | { |
96408a79 SA |
12076 | struct dwarf2_cu *target_cu = cu; |
12077 | struct die_info *target_die; | |
12078 | ||
ac9ec31b | 12079 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
12080 | gdb_assert (target_cu->objfile == objfile); |
12081 | if (die_is_declaration (target_die, target_cu)) | |
12082 | { | |
7d45c7c3 | 12083 | const char *target_physname; |
9112db09 JK |
12084 | |
12085 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 12086 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 12087 | if (target_physname == NULL) |
9112db09 | 12088 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 SA |
12089 | if (target_physname == NULL) |
12090 | complaint (&symfile_complaints, | |
216f72a1 | 12091 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12092 | "physname, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12093 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12094 | else |
7d455152 | 12095 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
12096 | } |
12097 | else | |
12098 | { | |
12099 | CORE_ADDR lowpc; | |
12100 | ||
12101 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 12102 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 12103 | <= PC_BOUNDS_INVALID) |
96408a79 | 12104 | complaint (&symfile_complaints, |
216f72a1 | 12105 | _("DW_AT_call_target target DIE has invalid " |
96408a79 | 12106 | "low pc, for referencing DIE 0x%x [in module %s]"), |
9c541725 | 12107 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 | 12108 | else |
3e29f34a MR |
12109 | { |
12110 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
12111 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
12112 | } | |
96408a79 SA |
12113 | } |
12114 | } | |
12115 | else | |
12116 | complaint (&symfile_complaints, | |
216f72a1 | 12117 | _("DW_TAG_call_site DW_AT_call_target is neither " |
96408a79 | 12118 | "block nor reference, for DIE 0x%x [in module %s]"), |
9c541725 | 12119 | to_underlying (die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12120 | |
12121 | call_site->per_cu = cu->per_cu; | |
12122 | ||
12123 | for (child_die = die->child; | |
12124 | child_die && child_die->tag; | |
12125 | child_die = sibling_die (child_die)) | |
12126 | { | |
96408a79 | 12127 | struct call_site_parameter *parameter; |
1788b2d3 | 12128 | struct attribute *loc, *origin; |
96408a79 | 12129 | |
216f72a1 JK |
12130 | if (child_die->tag != DW_TAG_call_site_parameter |
12131 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
12132 | { |
12133 | /* Already printed the complaint above. */ | |
12134 | continue; | |
12135 | } | |
12136 | ||
12137 | gdb_assert (call_site->parameter_count < nparams); | |
12138 | parameter = &call_site->parameter[call_site->parameter_count]; | |
12139 | ||
1788b2d3 JK |
12140 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
12141 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 12142 | register is contained in DW_AT_call_value. */ |
96408a79 | 12143 | |
24c5c679 | 12144 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
12145 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
12146 | if (origin == NULL) | |
12147 | { | |
12148 | /* This was a pre-DWARF-5 GNU extension alias | |
12149 | for DW_AT_call_parameter. */ | |
12150 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
12151 | } | |
7771576e | 12152 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 12153 | { |
1788b2d3 | 12154 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
12155 | |
12156 | sect_offset sect_off | |
12157 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
12158 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
12159 | { |
12160 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
12161 | binding can be done only inside one CU. Such referenced DIE | |
12162 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
12163 | complaint (&symfile_complaints, | |
216f72a1 JK |
12164 | _("DW_AT_call_parameter offset is not in CU for " |
12165 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12166 | to_underlying (child_die->sect_off), |
12167 | objfile_name (objfile)); | |
d76b7dbc JK |
12168 | continue; |
12169 | } | |
9c541725 PA |
12170 | parameter->u.param_cu_off |
12171 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
12172 | } |
12173 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
12174 | { |
12175 | complaint (&symfile_complaints, | |
12176 | _("No DW_FORM_block* DW_AT_location for " | |
216f72a1 | 12177 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), |
9c541725 | 12178 | to_underlying (child_die->sect_off), objfile_name (objfile)); |
96408a79 SA |
12179 | continue; |
12180 | } | |
24c5c679 | 12181 | else |
96408a79 | 12182 | { |
24c5c679 JK |
12183 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
12184 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
12185 | if (parameter->u.dwarf_reg != -1) | |
12186 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
12187 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
12188 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
12189 | ¶meter->u.fb_offset)) | |
12190 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
12191 | else | |
12192 | { | |
12193 | complaint (&symfile_complaints, | |
12194 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
12195 | "for DW_FORM_block* DW_AT_location is supported for " | |
216f72a1 | 12196 | "DW_TAG_call_site child DIE 0x%x " |
24c5c679 | 12197 | "[in module %s]"), |
9c541725 PA |
12198 | to_underlying (child_die->sect_off), |
12199 | objfile_name (objfile)); | |
24c5c679 JK |
12200 | continue; |
12201 | } | |
96408a79 SA |
12202 | } |
12203 | ||
216f72a1 JK |
12204 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
12205 | if (attr == NULL) | |
12206 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
12207 | if (!attr_form_is_block (attr)) |
12208 | { | |
12209 | complaint (&symfile_complaints, | |
216f72a1 JK |
12210 | _("No DW_FORM_block* DW_AT_call_value for " |
12211 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12212 | to_underlying (child_die->sect_off), |
12213 | objfile_name (objfile)); | |
96408a79 SA |
12214 | continue; |
12215 | } | |
12216 | parameter->value = DW_BLOCK (attr)->data; | |
12217 | parameter->value_size = DW_BLOCK (attr)->size; | |
12218 | ||
12219 | /* Parameters are not pre-cleared by memset above. */ | |
12220 | parameter->data_value = NULL; | |
12221 | parameter->data_value_size = 0; | |
12222 | call_site->parameter_count++; | |
12223 | ||
216f72a1 JK |
12224 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
12225 | if (attr == NULL) | |
12226 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
96408a79 SA |
12227 | if (attr) |
12228 | { | |
12229 | if (!attr_form_is_block (attr)) | |
12230 | complaint (&symfile_complaints, | |
216f72a1 JK |
12231 | _("No DW_FORM_block* DW_AT_call_data_value for " |
12232 | "DW_TAG_call_site child DIE 0x%x [in module %s]"), | |
9c541725 PA |
12233 | to_underlying (child_die->sect_off), |
12234 | objfile_name (objfile)); | |
96408a79 SA |
12235 | else |
12236 | { | |
12237 | parameter->data_value = DW_BLOCK (attr)->data; | |
12238 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
12239 | } | |
12240 | } | |
12241 | } | |
12242 | } | |
12243 | ||
43988095 JK |
12244 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
12245 | reading .debug_rnglists. | |
12246 | Callback's type should be: | |
12247 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12248 | Return true if the attributes are present and valid, otherwise, | |
12249 | return false. */ | |
12250 | ||
12251 | template <typename Callback> | |
12252 | static bool | |
12253 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
12254 | Callback &&callback) | |
12255 | { | |
12256 | struct objfile *objfile = cu->objfile; | |
12257 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12258 | struct comp_unit_head *cu_header = &cu->header; | |
12259 | bfd *obfd = objfile->obfd; | |
12260 | unsigned int addr_size = cu_header->addr_size; | |
12261 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12262 | /* Base address selection entry. */ | |
12263 | CORE_ADDR base; | |
12264 | int found_base; | |
12265 | unsigned int dummy; | |
12266 | const gdb_byte *buffer; | |
12267 | CORE_ADDR low = 0; | |
12268 | CORE_ADDR high = 0; | |
12269 | CORE_ADDR baseaddr; | |
12270 | bool overflow = false; | |
12271 | ||
12272 | found_base = cu->base_known; | |
12273 | base = cu->base_address; | |
12274 | ||
12275 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
12276 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
12277 | { | |
12278 | complaint (&symfile_complaints, | |
12279 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12280 | offset); | |
12281 | return false; | |
12282 | } | |
12283 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
12284 | ||
12285 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
12286 | ||
12287 | while (1) | |
12288 | { | |
7814882a JK |
12289 | /* Initialize it due to a false compiler warning. */ |
12290 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
12291 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
12292 | + dwarf2_per_objfile->rnglists.size); | |
12293 | unsigned int bytes_read; | |
12294 | ||
12295 | if (buffer == buf_end) | |
12296 | { | |
12297 | overflow = true; | |
12298 | break; | |
12299 | } | |
12300 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
12301 | switch (rlet) | |
12302 | { | |
12303 | case DW_RLE_end_of_list: | |
12304 | break; | |
12305 | case DW_RLE_base_address: | |
12306 | if (buffer + cu->header.addr_size > buf_end) | |
12307 | { | |
12308 | overflow = true; | |
12309 | break; | |
12310 | } | |
12311 | base = read_address (obfd, buffer, cu, &bytes_read); | |
12312 | found_base = 1; | |
12313 | buffer += bytes_read; | |
12314 | break; | |
12315 | case DW_RLE_start_length: | |
12316 | if (buffer + cu->header.addr_size > buf_end) | |
12317 | { | |
12318 | overflow = true; | |
12319 | break; | |
12320 | } | |
12321 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12322 | buffer += bytes_read; | |
12323 | range_end = (range_beginning | |
12324 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
12325 | buffer += bytes_read; | |
12326 | if (buffer > buf_end) | |
12327 | { | |
12328 | overflow = true; | |
12329 | break; | |
12330 | } | |
12331 | break; | |
12332 | case DW_RLE_offset_pair: | |
12333 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12334 | buffer += bytes_read; | |
12335 | if (buffer > buf_end) | |
12336 | { | |
12337 | overflow = true; | |
12338 | break; | |
12339 | } | |
12340 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
12341 | buffer += bytes_read; | |
12342 | if (buffer > buf_end) | |
12343 | { | |
12344 | overflow = true; | |
12345 | break; | |
12346 | } | |
12347 | break; | |
12348 | case DW_RLE_start_end: | |
12349 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
12350 | { | |
12351 | overflow = true; | |
12352 | break; | |
12353 | } | |
12354 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
12355 | buffer += bytes_read; | |
12356 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
12357 | buffer += bytes_read; | |
12358 | break; | |
12359 | default: | |
12360 | complaint (&symfile_complaints, | |
12361 | _("Invalid .debug_rnglists data (no base address)")); | |
12362 | return false; | |
12363 | } | |
12364 | if (rlet == DW_RLE_end_of_list || overflow) | |
12365 | break; | |
12366 | if (rlet == DW_RLE_base_address) | |
12367 | continue; | |
12368 | ||
12369 | if (!found_base) | |
12370 | { | |
12371 | /* We have no valid base address for the ranges | |
12372 | data. */ | |
12373 | complaint (&symfile_complaints, | |
12374 | _("Invalid .debug_rnglists data (no base address)")); | |
12375 | return false; | |
12376 | } | |
12377 | ||
12378 | if (range_beginning > range_end) | |
12379 | { | |
12380 | /* Inverted range entries are invalid. */ | |
12381 | complaint (&symfile_complaints, | |
12382 | _("Invalid .debug_rnglists data (inverted range)")); | |
12383 | return false; | |
12384 | } | |
12385 | ||
12386 | /* Empty range entries have no effect. */ | |
12387 | if (range_beginning == range_end) | |
12388 | continue; | |
12389 | ||
12390 | range_beginning += base; | |
12391 | range_end += base; | |
12392 | ||
12393 | /* A not-uncommon case of bad debug info. | |
12394 | Don't pollute the addrmap with bad data. */ | |
12395 | if (range_beginning + baseaddr == 0 | |
12396 | && !dwarf2_per_objfile->has_section_at_zero) | |
12397 | { | |
12398 | complaint (&symfile_complaints, | |
12399 | _(".debug_rnglists entry has start address of zero" | |
12400 | " [in module %s]"), objfile_name (objfile)); | |
12401 | continue; | |
12402 | } | |
12403 | ||
12404 | callback (range_beginning, range_end); | |
12405 | } | |
12406 | ||
12407 | if (overflow) | |
12408 | { | |
12409 | complaint (&symfile_complaints, | |
12410 | _("Offset %d is not terminated " | |
12411 | "for DW_AT_ranges attribute"), | |
12412 | offset); | |
12413 | return false; | |
12414 | } | |
12415 | ||
12416 | return true; | |
12417 | } | |
12418 | ||
12419 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
12420 | Callback's type should be: | |
12421 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 12422 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 12423 | |
43988095 | 12424 | template <typename Callback> |
43039443 | 12425 | static int |
5f46c5a5 | 12426 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 12427 | Callback &&callback) |
43039443 JK |
12428 | { |
12429 | struct objfile *objfile = cu->objfile; | |
3e29f34a | 12430 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
43039443 JK |
12431 | struct comp_unit_head *cu_header = &cu->header; |
12432 | bfd *obfd = objfile->obfd; | |
12433 | unsigned int addr_size = cu_header->addr_size; | |
12434 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12435 | /* Base address selection entry. */ | |
12436 | CORE_ADDR base; | |
12437 | int found_base; | |
12438 | unsigned int dummy; | |
d521ce57 | 12439 | const gdb_byte *buffer; |
ff013f42 | 12440 | CORE_ADDR baseaddr; |
43039443 | 12441 | |
43988095 JK |
12442 | if (cu_header->version >= 5) |
12443 | return dwarf2_rnglists_process (offset, cu, callback); | |
12444 | ||
d00adf39 DE |
12445 | found_base = cu->base_known; |
12446 | base = cu->base_address; | |
43039443 | 12447 | |
be391dca | 12448 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 12449 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
12450 | { |
12451 | complaint (&symfile_complaints, | |
12452 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
12453 | offset); | |
12454 | return 0; | |
12455 | } | |
dce234bc | 12456 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 12457 | |
e7030f15 | 12458 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 12459 | |
43039443 JK |
12460 | while (1) |
12461 | { | |
12462 | CORE_ADDR range_beginning, range_end; | |
12463 | ||
12464 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
12465 | buffer += addr_size; | |
12466 | range_end = read_address (obfd, buffer, cu, &dummy); | |
12467 | buffer += addr_size; | |
12468 | offset += 2 * addr_size; | |
12469 | ||
12470 | /* An end of list marker is a pair of zero addresses. */ | |
12471 | if (range_beginning == 0 && range_end == 0) | |
12472 | /* Found the end of list entry. */ | |
12473 | break; | |
12474 | ||
12475 | /* Each base address selection entry is a pair of 2 values. | |
12476 | The first is the largest possible address, the second is | |
12477 | the base address. Check for a base address here. */ | |
12478 | if ((range_beginning & mask) == mask) | |
12479 | { | |
28d2bfb9 AB |
12480 | /* If we found the largest possible address, then we already |
12481 | have the base address in range_end. */ | |
12482 | base = range_end; | |
43039443 JK |
12483 | found_base = 1; |
12484 | continue; | |
12485 | } | |
12486 | ||
12487 | if (!found_base) | |
12488 | { | |
12489 | /* We have no valid base address for the ranges | |
12490 | data. */ | |
12491 | complaint (&symfile_complaints, | |
12492 | _("Invalid .debug_ranges data (no base address)")); | |
12493 | return 0; | |
12494 | } | |
12495 | ||
9277c30c UW |
12496 | if (range_beginning > range_end) |
12497 | { | |
12498 | /* Inverted range entries are invalid. */ | |
12499 | complaint (&symfile_complaints, | |
12500 | _("Invalid .debug_ranges data (inverted range)")); | |
12501 | return 0; | |
12502 | } | |
12503 | ||
12504 | /* Empty range entries have no effect. */ | |
12505 | if (range_beginning == range_end) | |
12506 | continue; | |
12507 | ||
43039443 JK |
12508 | range_beginning += base; |
12509 | range_end += base; | |
12510 | ||
01093045 DE |
12511 | /* A not-uncommon case of bad debug info. |
12512 | Don't pollute the addrmap with bad data. */ | |
12513 | if (range_beginning + baseaddr == 0 | |
12514 | && !dwarf2_per_objfile->has_section_at_zero) | |
12515 | { | |
12516 | complaint (&symfile_complaints, | |
12517 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 12518 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
12519 | continue; |
12520 | } | |
12521 | ||
5f46c5a5 JK |
12522 | callback (range_beginning, range_end); |
12523 | } | |
12524 | ||
12525 | return 1; | |
12526 | } | |
12527 | ||
12528 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
12529 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
12530 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
12531 | ||
12532 | static int | |
12533 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
12534 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
12535 | struct partial_symtab *ranges_pst) | |
12536 | { | |
12537 | struct objfile *objfile = cu->objfile; | |
12538 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12539 | const CORE_ADDR baseaddr = ANOFFSET (objfile->section_offsets, | |
12540 | SECT_OFF_TEXT (objfile)); | |
12541 | int low_set = 0; | |
12542 | CORE_ADDR low = 0; | |
12543 | CORE_ADDR high = 0; | |
12544 | int retval; | |
12545 | ||
12546 | retval = dwarf2_ranges_process (offset, cu, | |
12547 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
12548 | { | |
9277c30c | 12549 | if (ranges_pst != NULL) |
3e29f34a MR |
12550 | { |
12551 | CORE_ADDR lowpc; | |
12552 | CORE_ADDR highpc; | |
12553 | ||
12554 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12555 | range_beginning + baseaddr); | |
12556 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, | |
12557 | range_end + baseaddr); | |
12558 | addrmap_set_empty (objfile->psymtabs_addrmap, lowpc, highpc - 1, | |
12559 | ranges_pst); | |
12560 | } | |
ff013f42 | 12561 | |
43039443 JK |
12562 | /* FIXME: This is recording everything as a low-high |
12563 | segment of consecutive addresses. We should have a | |
12564 | data structure for discontiguous block ranges | |
12565 | instead. */ | |
12566 | if (! low_set) | |
12567 | { | |
12568 | low = range_beginning; | |
12569 | high = range_end; | |
12570 | low_set = 1; | |
12571 | } | |
12572 | else | |
12573 | { | |
12574 | if (range_beginning < low) | |
12575 | low = range_beginning; | |
12576 | if (range_end > high) | |
12577 | high = range_end; | |
12578 | } | |
5f46c5a5 JK |
12579 | }); |
12580 | if (!retval) | |
12581 | return 0; | |
43039443 JK |
12582 | |
12583 | if (! low_set) | |
12584 | /* If the first entry is an end-of-list marker, the range | |
12585 | describes an empty scope, i.e. no instructions. */ | |
12586 | return 0; | |
12587 | ||
12588 | if (low_return) | |
12589 | *low_return = low; | |
12590 | if (high_return) | |
12591 | *high_return = high; | |
12592 | return 1; | |
12593 | } | |
12594 | ||
3a2b436a JK |
12595 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
12596 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 12597 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 12598 | |
3a2b436a | 12599 | static enum pc_bounds_kind |
af34e669 | 12600 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
12601 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
12602 | struct partial_symtab *pst) | |
c906108c SS |
12603 | { |
12604 | struct attribute *attr; | |
91da1414 | 12605 | struct attribute *attr_high; |
af34e669 DJ |
12606 | CORE_ADDR low = 0; |
12607 | CORE_ADDR high = 0; | |
e385593e | 12608 | enum pc_bounds_kind ret; |
c906108c | 12609 | |
91da1414 MW |
12610 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12611 | if (attr_high) | |
af34e669 | 12612 | { |
e142c38c | 12613 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 12614 | if (attr) |
91da1414 | 12615 | { |
31aa7e4e JB |
12616 | low = attr_value_as_address (attr); |
12617 | high = attr_value_as_address (attr_high); | |
12618 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12619 | high += low; | |
91da1414 | 12620 | } |
af34e669 DJ |
12621 | else |
12622 | /* Found high w/o low attribute. */ | |
e385593e | 12623 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
12624 | |
12625 | /* Found consecutive range of addresses. */ | |
3a2b436a | 12626 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 12627 | } |
c906108c | 12628 | else |
af34e669 | 12629 | { |
e142c38c | 12630 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
12631 | if (attr != NULL) |
12632 | { | |
ab435259 DE |
12633 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12634 | We take advantage of the fact that DW_AT_ranges does not appear | |
12635 | in DW_TAG_compile_unit of DWO files. */ | |
12636 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
12637 | unsigned int ranges_offset = (DW_UNSND (attr) | |
12638 | + (need_ranges_base | |
12639 | ? cu->ranges_base | |
12640 | : 0)); | |
2e3cf129 | 12641 | |
af34e669 | 12642 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 12643 | .debug_ranges section. */ |
2e3cf129 | 12644 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 12645 | return PC_BOUNDS_INVALID; |
43039443 | 12646 | /* Found discontinuous range of addresses. */ |
3a2b436a | 12647 | ret = PC_BOUNDS_RANGES; |
af34e669 | 12648 | } |
e385593e JK |
12649 | else |
12650 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 12651 | } |
c906108c | 12652 | |
9373cf26 JK |
12653 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
12654 | if (high <= low) | |
e385593e | 12655 | return PC_BOUNDS_INVALID; |
c906108c SS |
12656 | |
12657 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
12658 | eliminate duplicate copies of functions and vtables and such. | |
12659 | The linker will arbitrarily choose one and discard the others. | |
12660 | The AT_*_pc values for such functions refer to local labels in | |
12661 | these sections. If the section from that file was discarded, the | |
12662 | labels are not in the output, so the relocs get a value of 0. | |
12663 | If this is a discarded function, mark the pc bounds as invalid, | |
12664 | so that GDB will ignore it. */ | |
72dca2f5 | 12665 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 12666 | return PC_BOUNDS_INVALID; |
c906108c SS |
12667 | |
12668 | *lowpc = low; | |
96408a79 SA |
12669 | if (highpc) |
12670 | *highpc = high; | |
af34e669 | 12671 | return ret; |
c906108c SS |
12672 | } |
12673 | ||
b084d499 JB |
12674 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
12675 | its low and high PC addresses. Do nothing if these addresses could not | |
12676 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
12677 | and HIGHPC to the high address if greater than HIGHPC. */ | |
12678 | ||
12679 | static void | |
12680 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
12681 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12682 | struct dwarf2_cu *cu) | |
12683 | { | |
12684 | CORE_ADDR low, high; | |
12685 | struct die_info *child = die->child; | |
12686 | ||
e385593e | 12687 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 12688 | { |
325fac50 PA |
12689 | *lowpc = std::min (*lowpc, low); |
12690 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
12691 | } |
12692 | ||
12693 | /* If the language does not allow nested subprograms (either inside | |
12694 | subprograms or lexical blocks), we're done. */ | |
12695 | if (cu->language != language_ada) | |
12696 | return; | |
6e70227d | 12697 | |
b084d499 JB |
12698 | /* Check all the children of the given DIE. If it contains nested |
12699 | subprograms, then check their pc bounds. Likewise, we need to | |
12700 | check lexical blocks as well, as they may also contain subprogram | |
12701 | definitions. */ | |
12702 | while (child && child->tag) | |
12703 | { | |
12704 | if (child->tag == DW_TAG_subprogram | |
12705 | || child->tag == DW_TAG_lexical_block) | |
12706 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
12707 | child = sibling_die (child); | |
12708 | } | |
12709 | } | |
12710 | ||
fae299cd DC |
12711 | /* Get the low and high pc's represented by the scope DIE, and store |
12712 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
12713 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
12714 | ||
12715 | static void | |
12716 | get_scope_pc_bounds (struct die_info *die, | |
12717 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
12718 | struct dwarf2_cu *cu) | |
12719 | { | |
12720 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
12721 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
12722 | CORE_ADDR current_low, current_high; | |
12723 | ||
3a2b436a | 12724 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 12725 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
12726 | { |
12727 | best_low = current_low; | |
12728 | best_high = current_high; | |
12729 | } | |
12730 | else | |
12731 | { | |
12732 | struct die_info *child = die->child; | |
12733 | ||
12734 | while (child && child->tag) | |
12735 | { | |
12736 | switch (child->tag) { | |
12737 | case DW_TAG_subprogram: | |
b084d499 | 12738 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
12739 | break; |
12740 | case DW_TAG_namespace: | |
f55ee35c | 12741 | case DW_TAG_module: |
fae299cd DC |
12742 | /* FIXME: carlton/2004-01-16: Should we do this for |
12743 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
12744 | that current GCC's always emit the DIEs corresponding | |
12745 | to definitions of methods of classes as children of a | |
12746 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
12747 | the DIEs giving the declarations, which could be | |
12748 | anywhere). But I don't see any reason why the | |
12749 | standards says that they have to be there. */ | |
12750 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
12751 | ||
12752 | if (current_low != ((CORE_ADDR) -1)) | |
12753 | { | |
325fac50 PA |
12754 | best_low = std::min (best_low, current_low); |
12755 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
12756 | } |
12757 | break; | |
12758 | default: | |
0963b4bd | 12759 | /* Ignore. */ |
fae299cd DC |
12760 | break; |
12761 | } | |
12762 | ||
12763 | child = sibling_die (child); | |
12764 | } | |
12765 | } | |
12766 | ||
12767 | *lowpc = best_low; | |
12768 | *highpc = best_high; | |
12769 | } | |
12770 | ||
801e3a5b JB |
12771 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
12772 | in DIE. */ | |
380bca97 | 12773 | |
801e3a5b JB |
12774 | static void |
12775 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
12776 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
12777 | { | |
bb5ed363 | 12778 | struct objfile *objfile = cu->objfile; |
3e29f34a | 12779 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 12780 | struct attribute *attr; |
91da1414 | 12781 | struct attribute *attr_high; |
801e3a5b | 12782 | |
91da1414 MW |
12783 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
12784 | if (attr_high) | |
801e3a5b | 12785 | { |
801e3a5b JB |
12786 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
12787 | if (attr) | |
12788 | { | |
31aa7e4e JB |
12789 | CORE_ADDR low = attr_value_as_address (attr); |
12790 | CORE_ADDR high = attr_value_as_address (attr_high); | |
12791 | ||
12792 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
12793 | high += low; | |
9a619af0 | 12794 | |
3e29f34a MR |
12795 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
12796 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
12797 | record_block_range (block, low, high - 1); | |
801e3a5b JB |
12798 | } |
12799 | } | |
12800 | ||
12801 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
12802 | if (attr) | |
12803 | { | |
bb5ed363 | 12804 | bfd *obfd = objfile->obfd; |
ab435259 DE |
12805 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
12806 | We take advantage of the fact that DW_AT_ranges does not appear | |
12807 | in DW_TAG_compile_unit of DWO files. */ | |
12808 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
12809 | |
12810 | /* The value of the DW_AT_ranges attribute is the offset of the | |
12811 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
12812 | unsigned long offset = (DW_UNSND (attr) |
12813 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 12814 | const gdb_byte *buffer; |
801e3a5b JB |
12815 | |
12816 | /* For some target architectures, but not others, the | |
12817 | read_address function sign-extends the addresses it returns. | |
12818 | To recognize base address selection entries, we need a | |
12819 | mask. */ | |
12820 | unsigned int addr_size = cu->header.addr_size; | |
12821 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
12822 | ||
12823 | /* The base address, to which the next pair is relative. Note | |
12824 | that this 'base' is a DWARF concept: most entries in a range | |
12825 | list are relative, to reduce the number of relocs against the | |
12826 | debugging information. This is separate from this function's | |
12827 | 'baseaddr' argument, which GDB uses to relocate debugging | |
12828 | information from a shared library based on the address at | |
12829 | which the library was loaded. */ | |
d00adf39 DE |
12830 | CORE_ADDR base = cu->base_address; |
12831 | int base_known = cu->base_known; | |
801e3a5b | 12832 | |
5f46c5a5 JK |
12833 | dwarf2_ranges_process (offset, cu, |
12834 | [&] (CORE_ADDR start, CORE_ADDR end) | |
12835 | { | |
58fdfd2c JK |
12836 | start += baseaddr; |
12837 | end += baseaddr; | |
5f46c5a5 JK |
12838 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
12839 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
12840 | record_block_range (block, start, end - 1); | |
12841 | }); | |
801e3a5b JB |
12842 | } |
12843 | } | |
12844 | ||
685b1105 JK |
12845 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
12846 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 12847 | |
685b1105 JK |
12848 | static void |
12849 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 12850 | { |
38360086 | 12851 | int major, minor; |
60d5a603 JK |
12852 | |
12853 | if (cu->producer == NULL) | |
12854 | { | |
12855 | /* For unknown compilers expect their behavior is DWARF version | |
12856 | compliant. | |
12857 | ||
12858 | GCC started to support .debug_types sections by -gdwarf-4 since | |
12859 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
12860 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
12861 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
12862 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 12863 | } |
b1ffba5a | 12864 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 12865 | { |
38360086 MW |
12866 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
12867 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 12868 | } |
5230b05a WT |
12869 | else if (producer_is_icc (cu->producer, &major, &minor)) |
12870 | cu->producer_is_icc_lt_14 = major < 14; | |
685b1105 JK |
12871 | else |
12872 | { | |
12873 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
12874 | compliant. */ | |
60d5a603 JK |
12875 | } |
12876 | ||
ba919b58 | 12877 | cu->checked_producer = 1; |
685b1105 | 12878 | } |
ba919b58 | 12879 | |
685b1105 JK |
12880 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
12881 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
12882 | during 4.6.0 experimental. */ | |
12883 | ||
12884 | static int | |
12885 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
12886 | { | |
12887 | if (!cu->checked_producer) | |
12888 | check_producer (cu); | |
12889 | ||
12890 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
12891 | } |
12892 | ||
12893 | /* Return the default accessibility type if it is not overriden by | |
12894 | DW_AT_accessibility. */ | |
12895 | ||
12896 | static enum dwarf_access_attribute | |
12897 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
12898 | { | |
12899 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
12900 | { | |
12901 | /* The default DWARF 2 accessibility for members is public, the default | |
12902 | accessibility for inheritance is private. */ | |
12903 | ||
12904 | if (die->tag != DW_TAG_inheritance) | |
12905 | return DW_ACCESS_public; | |
12906 | else | |
12907 | return DW_ACCESS_private; | |
12908 | } | |
12909 | else | |
12910 | { | |
12911 | /* DWARF 3+ defines the default accessibility a different way. The same | |
12912 | rules apply now for DW_TAG_inheritance as for the members and it only | |
12913 | depends on the container kind. */ | |
12914 | ||
12915 | if (die->parent->tag == DW_TAG_class_type) | |
12916 | return DW_ACCESS_private; | |
12917 | else | |
12918 | return DW_ACCESS_public; | |
12919 | } | |
12920 | } | |
12921 | ||
74ac6d43 TT |
12922 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
12923 | offset. If the attribute was not found return 0, otherwise return | |
12924 | 1. If it was found but could not properly be handled, set *OFFSET | |
12925 | to 0. */ | |
12926 | ||
12927 | static int | |
12928 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
12929 | LONGEST *offset) | |
12930 | { | |
12931 | struct attribute *attr; | |
12932 | ||
12933 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
12934 | if (attr != NULL) | |
12935 | { | |
12936 | *offset = 0; | |
12937 | ||
12938 | /* Note that we do not check for a section offset first here. | |
12939 | This is because DW_AT_data_member_location is new in DWARF 4, | |
12940 | so if we see it, we can assume that a constant form is really | |
12941 | a constant and not a section offset. */ | |
12942 | if (attr_form_is_constant (attr)) | |
12943 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
12944 | else if (attr_form_is_section_offset (attr)) | |
12945 | dwarf2_complex_location_expr_complaint (); | |
12946 | else if (attr_form_is_block (attr)) | |
12947 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
12948 | else | |
12949 | dwarf2_complex_location_expr_complaint (); | |
12950 | ||
12951 | return 1; | |
12952 | } | |
12953 | ||
12954 | return 0; | |
12955 | } | |
12956 | ||
c906108c SS |
12957 | /* Add an aggregate field to the field list. */ |
12958 | ||
12959 | static void | |
107d2387 | 12960 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 12961 | struct dwarf2_cu *cu) |
6e70227d | 12962 | { |
e7c27a73 | 12963 | struct objfile *objfile = cu->objfile; |
5e2b427d | 12964 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12965 | struct nextfield *new_field; |
12966 | struct attribute *attr; | |
12967 | struct field *fp; | |
15d034d0 | 12968 | const char *fieldname = ""; |
c906108c SS |
12969 | |
12970 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 12971 | new_field = XNEW (struct nextfield); |
b8c9b27d | 12972 | make_cleanup (xfree, new_field); |
c906108c | 12973 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
12974 | |
12975 | if (die->tag == DW_TAG_inheritance) | |
12976 | { | |
12977 | new_field->next = fip->baseclasses; | |
12978 | fip->baseclasses = new_field; | |
12979 | } | |
12980 | else | |
12981 | { | |
12982 | new_field->next = fip->fields; | |
12983 | fip->fields = new_field; | |
12984 | } | |
c906108c SS |
12985 | fip->nfields++; |
12986 | ||
e142c38c | 12987 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
12988 | if (attr) |
12989 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
12990 | else |
12991 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
12992 | if (new_field->accessibility != DW_ACCESS_public) |
12993 | fip->non_public_fields = 1; | |
60d5a603 | 12994 | |
e142c38c | 12995 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
12996 | if (attr) |
12997 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
12998 | else |
12999 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
13000 | |
13001 | fp = &new_field->field; | |
a9a9bd0f | 13002 | |
e142c38c | 13003 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 13004 | { |
74ac6d43 TT |
13005 | LONGEST offset; |
13006 | ||
a9a9bd0f | 13007 | /* Data member other than a C++ static data member. */ |
6e70227d | 13008 | |
c906108c | 13009 | /* Get type of field. */ |
e7c27a73 | 13010 | fp->type = die_type (die, cu); |
c906108c | 13011 | |
d6a843b5 | 13012 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 13013 | |
c906108c | 13014 | /* Get bit size of field (zero if none). */ |
e142c38c | 13015 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
13016 | if (attr) |
13017 | { | |
13018 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
13019 | } | |
13020 | else | |
13021 | { | |
13022 | FIELD_BITSIZE (*fp) = 0; | |
13023 | } | |
13024 | ||
13025 | /* Get bit offset of field. */ | |
74ac6d43 TT |
13026 | if (handle_data_member_location (die, cu, &offset)) |
13027 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 13028 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
13029 | if (attr) |
13030 | { | |
5e2b427d | 13031 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
13032 | { |
13033 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
13034 | additional bit offset from the MSB of the containing |
13035 | anonymous object to the MSB of the field. We don't | |
13036 | have to do anything special since we don't need to | |
13037 | know the size of the anonymous object. */ | |
f41f5e61 | 13038 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
13039 | } |
13040 | else | |
13041 | { | |
13042 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
13043 | MSB of the anonymous object, subtract off the number of |
13044 | bits from the MSB of the field to the MSB of the | |
13045 | object, and then subtract off the number of bits of | |
13046 | the field itself. The result is the bit offset of | |
13047 | the LSB of the field. */ | |
c906108c SS |
13048 | int anonymous_size; |
13049 | int bit_offset = DW_UNSND (attr); | |
13050 | ||
e142c38c | 13051 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13052 | if (attr) |
13053 | { | |
13054 | /* The size of the anonymous object containing | |
13055 | the bit field is explicit, so use the | |
13056 | indicated size (in bytes). */ | |
13057 | anonymous_size = DW_UNSND (attr); | |
13058 | } | |
13059 | else | |
13060 | { | |
13061 | /* The size of the anonymous object containing | |
13062 | the bit field must be inferred from the type | |
13063 | attribute of the data member containing the | |
13064 | bit field. */ | |
13065 | anonymous_size = TYPE_LENGTH (fp->type); | |
13066 | } | |
f41f5e61 PA |
13067 | SET_FIELD_BITPOS (*fp, |
13068 | (FIELD_BITPOS (*fp) | |
13069 | + anonymous_size * bits_per_byte | |
13070 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
13071 | } |
13072 | } | |
da5b30da AA |
13073 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
13074 | if (attr != NULL) | |
13075 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
13076 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
13077 | |
13078 | /* Get name of field. */ | |
39cbfefa DJ |
13079 | fieldname = dwarf2_name (die, cu); |
13080 | if (fieldname == NULL) | |
13081 | fieldname = ""; | |
d8151005 DJ |
13082 | |
13083 | /* The name is already allocated along with this objfile, so we don't | |
13084 | need to duplicate it for the type. */ | |
13085 | fp->name = fieldname; | |
c906108c SS |
13086 | |
13087 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 13088 | pointer or virtual base class pointer) to private. */ |
e142c38c | 13089 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 13090 | { |
d48cc9dd | 13091 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
13092 | new_field->accessibility = DW_ACCESS_private; |
13093 | fip->non_public_fields = 1; | |
13094 | } | |
13095 | } | |
a9a9bd0f | 13096 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 13097 | { |
a9a9bd0f DC |
13098 | /* C++ static member. */ |
13099 | ||
13100 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
13101 | is a declaration, but all versions of G++ as of this writing | |
13102 | (so through at least 3.2.1) incorrectly generate | |
13103 | DW_TAG_variable tags. */ | |
6e70227d | 13104 | |
ff355380 | 13105 | const char *physname; |
c906108c | 13106 | |
a9a9bd0f | 13107 | /* Get name of field. */ |
39cbfefa DJ |
13108 | fieldname = dwarf2_name (die, cu); |
13109 | if (fieldname == NULL) | |
c906108c SS |
13110 | return; |
13111 | ||
254e6b9e | 13112 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
13113 | if (attr |
13114 | /* Only create a symbol if this is an external value. | |
13115 | new_symbol checks this and puts the value in the global symbol | |
13116 | table, which we want. If it is not external, new_symbol | |
13117 | will try to put the value in cu->list_in_scope which is wrong. */ | |
13118 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
13119 | { |
13120 | /* A static const member, not much different than an enum as far as | |
13121 | we're concerned, except that we can support more types. */ | |
13122 | new_symbol (die, NULL, cu); | |
13123 | } | |
13124 | ||
2df3850c | 13125 | /* Get physical name. */ |
ff355380 | 13126 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 13127 | |
d8151005 DJ |
13128 | /* The name is already allocated along with this objfile, so we don't |
13129 | need to duplicate it for the type. */ | |
13130 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 13131 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 13132 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
13133 | } |
13134 | else if (die->tag == DW_TAG_inheritance) | |
13135 | { | |
74ac6d43 | 13136 | LONGEST offset; |
d4b96c9a | 13137 | |
74ac6d43 TT |
13138 | /* C++ base class field. */ |
13139 | if (handle_data_member_location (die, cu, &offset)) | |
13140 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 13141 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 13142 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
13143 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
13144 | fip->nbaseclasses++; | |
13145 | } | |
13146 | } | |
13147 | ||
98751a41 JK |
13148 | /* Add a typedef defined in the scope of the FIP's class. */ |
13149 | ||
13150 | static void | |
13151 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
13152 | struct dwarf2_cu *cu) | |
6e70227d | 13153 | { |
98751a41 | 13154 | struct typedef_field_list *new_field; |
98751a41 | 13155 | struct typedef_field *fp; |
98751a41 JK |
13156 | |
13157 | /* Allocate a new field list entry and link it in. */ | |
8d749320 | 13158 | new_field = XCNEW (struct typedef_field_list); |
98751a41 JK |
13159 | make_cleanup (xfree, new_field); |
13160 | ||
13161 | gdb_assert (die->tag == DW_TAG_typedef); | |
13162 | ||
13163 | fp = &new_field->field; | |
13164 | ||
13165 | /* Get name of field. */ | |
13166 | fp->name = dwarf2_name (die, cu); | |
13167 | if (fp->name == NULL) | |
13168 | return; | |
13169 | ||
13170 | fp->type = read_type_die (die, cu); | |
13171 | ||
13172 | new_field->next = fip->typedef_field_list; | |
13173 | fip->typedef_field_list = new_field; | |
13174 | fip->typedef_field_list_count++; | |
13175 | } | |
13176 | ||
c906108c SS |
13177 | /* Create the vector of fields, and attach it to the type. */ |
13178 | ||
13179 | static void | |
fba45db2 | 13180 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13181 | struct dwarf2_cu *cu) |
c906108c SS |
13182 | { |
13183 | int nfields = fip->nfields; | |
13184 | ||
13185 | /* Record the field count, allocate space for the array of fields, | |
13186 | and create blank accessibility bitfields if necessary. */ | |
13187 | TYPE_NFIELDS (type) = nfields; | |
13188 | TYPE_FIELDS (type) = (struct field *) | |
13189 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
13190 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
13191 | ||
b4ba55a1 | 13192 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
13193 | { |
13194 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13195 | ||
13196 | TYPE_FIELD_PRIVATE_BITS (type) = | |
13197 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13198 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
13199 | ||
13200 | TYPE_FIELD_PROTECTED_BITS (type) = | |
13201 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13202 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
13203 | ||
774b6a14 TT |
13204 | TYPE_FIELD_IGNORE_BITS (type) = |
13205 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
13206 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
13207 | } |
13208 | ||
13209 | /* If the type has baseclasses, allocate and clear a bit vector for | |
13210 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 13211 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
13212 | { |
13213 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 13214 | unsigned char *pointer; |
c906108c SS |
13215 | |
13216 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 13217 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 13218 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
c906108c SS |
13219 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
13220 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
13221 | } | |
13222 | ||
3e43a32a MS |
13223 | /* Copy the saved-up fields into the field vector. Start from the head of |
13224 | the list, adding to the tail of the field array, so that they end up in | |
13225 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
13226 | while (nfields-- > 0) |
13227 | { | |
7d0ccb61 DJ |
13228 | struct nextfield *fieldp; |
13229 | ||
13230 | if (fip->fields) | |
13231 | { | |
13232 | fieldp = fip->fields; | |
13233 | fip->fields = fieldp->next; | |
13234 | } | |
13235 | else | |
13236 | { | |
13237 | fieldp = fip->baseclasses; | |
13238 | fip->baseclasses = fieldp->next; | |
13239 | } | |
13240 | ||
13241 | TYPE_FIELD (type, nfields) = fieldp->field; | |
13242 | switch (fieldp->accessibility) | |
c906108c | 13243 | { |
c5aa993b | 13244 | case DW_ACCESS_private: |
b4ba55a1 JB |
13245 | if (cu->language != language_ada) |
13246 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 13247 | break; |
c906108c | 13248 | |
c5aa993b | 13249 | case DW_ACCESS_protected: |
b4ba55a1 JB |
13250 | if (cu->language != language_ada) |
13251 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 13252 | break; |
c906108c | 13253 | |
c5aa993b JM |
13254 | case DW_ACCESS_public: |
13255 | break; | |
c906108c | 13256 | |
c5aa993b JM |
13257 | default: |
13258 | /* Unknown accessibility. Complain and treat it as public. */ | |
13259 | { | |
e2e0b3e5 | 13260 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 13261 | fieldp->accessibility); |
c5aa993b JM |
13262 | } |
13263 | break; | |
c906108c SS |
13264 | } |
13265 | if (nfields < fip->nbaseclasses) | |
13266 | { | |
7d0ccb61 | 13267 | switch (fieldp->virtuality) |
c906108c | 13268 | { |
c5aa993b JM |
13269 | case DW_VIRTUALITY_virtual: |
13270 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 13271 | if (cu->language == language_ada) |
a73c6dcd | 13272 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
13273 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
13274 | break; | |
c906108c SS |
13275 | } |
13276 | } | |
c906108c SS |
13277 | } |
13278 | } | |
13279 | ||
7d27a96d TT |
13280 | /* Return true if this member function is a constructor, false |
13281 | otherwise. */ | |
13282 | ||
13283 | static int | |
13284 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
13285 | { | |
13286 | const char *fieldname; | |
fe978cb0 | 13287 | const char *type_name; |
7d27a96d TT |
13288 | int len; |
13289 | ||
13290 | if (die->parent == NULL) | |
13291 | return 0; | |
13292 | ||
13293 | if (die->parent->tag != DW_TAG_structure_type | |
13294 | && die->parent->tag != DW_TAG_union_type | |
13295 | && die->parent->tag != DW_TAG_class_type) | |
13296 | return 0; | |
13297 | ||
13298 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
13299 | type_name = dwarf2_name (die->parent, cu); |
13300 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
13301 | return 0; |
13302 | ||
13303 | len = strlen (fieldname); | |
fe978cb0 PA |
13304 | return (strncmp (fieldname, type_name, len) == 0 |
13305 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
13306 | } |
13307 | ||
c906108c SS |
13308 | /* Add a member function to the proper fieldlist. */ |
13309 | ||
13310 | static void | |
107d2387 | 13311 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 13312 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 13313 | { |
e7c27a73 | 13314 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13315 | struct attribute *attr; |
13316 | struct fnfieldlist *flp; | |
13317 | int i; | |
13318 | struct fn_field *fnp; | |
15d034d0 | 13319 | const char *fieldname; |
c906108c | 13320 | struct nextfnfield *new_fnfield; |
f792889a | 13321 | struct type *this_type; |
60d5a603 | 13322 | enum dwarf_access_attribute accessibility; |
c906108c | 13323 | |
b4ba55a1 | 13324 | if (cu->language == language_ada) |
a73c6dcd | 13325 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 13326 | |
2df3850c | 13327 | /* Get name of member function. */ |
39cbfefa DJ |
13328 | fieldname = dwarf2_name (die, cu); |
13329 | if (fieldname == NULL) | |
2df3850c | 13330 | return; |
c906108c | 13331 | |
c906108c SS |
13332 | /* Look up member function name in fieldlist. */ |
13333 | for (i = 0; i < fip->nfnfields; i++) | |
13334 | { | |
27bfe10e | 13335 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
13336 | break; |
13337 | } | |
13338 | ||
13339 | /* Create new list element if necessary. */ | |
13340 | if (i < fip->nfnfields) | |
13341 | flp = &fip->fnfieldlists[i]; | |
13342 | else | |
13343 | { | |
13344 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
13345 | { | |
13346 | fip->fnfieldlists = (struct fnfieldlist *) | |
13347 | xrealloc (fip->fnfieldlists, | |
13348 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 13349 | * sizeof (struct fnfieldlist)); |
c906108c | 13350 | if (fip->nfnfields == 0) |
c13c43fd | 13351 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
13352 | } |
13353 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
13354 | flp->name = fieldname; | |
13355 | flp->length = 0; | |
13356 | flp->head = NULL; | |
3da10d80 | 13357 | i = fip->nfnfields++; |
c906108c SS |
13358 | } |
13359 | ||
13360 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 13361 | entry. */ |
8d749320 | 13362 | new_fnfield = XNEW (struct nextfnfield); |
b8c9b27d | 13363 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
13364 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
13365 | new_fnfield->next = flp->head; | |
13366 | flp->head = new_fnfield; | |
13367 | flp->length++; | |
13368 | ||
13369 | /* Fill in the member function field info. */ | |
13370 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
13371 | |
13372 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 13373 | if (cu->language == language_cplus) |
3da10d80 KS |
13374 | { |
13375 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
13376 | die, cu); | |
13377 | } | |
13378 | else | |
13379 | { | |
1d06ead6 | 13380 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
13381 | fnp->physname = physname ? physname : ""; |
13382 | } | |
13383 | ||
c906108c | 13384 | fnp->type = alloc_type (objfile); |
f792889a DJ |
13385 | this_type = read_type_die (die, cu); |
13386 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 13387 | { |
f792889a | 13388 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 13389 | |
f792889a | 13390 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
13391 | of the method itself (TYPE_CODE_METHOD). */ |
13392 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
13393 | TYPE_TARGET_TYPE (this_type), |
13394 | TYPE_FIELDS (this_type), | |
13395 | TYPE_NFIELDS (this_type), | |
13396 | TYPE_VARARGS (this_type)); | |
c906108c SS |
13397 | |
13398 | /* Handle static member functions. | |
c5aa993b | 13399 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
13400 | member functions. G++ helps GDB by marking the first |
13401 | parameter for non-static member functions (which is the this | |
13402 | pointer) as artificial. We obtain this information from | |
13403 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 13404 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
13405 | fnp->voffset = VOFFSET_STATIC; |
13406 | } | |
13407 | else | |
e2e0b3e5 | 13408 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 13409 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
13410 | |
13411 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 13412 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 13413 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 13414 | |
3e43a32a MS |
13415 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
13416 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
13417 | |
13418 | /* Get accessibility. */ | |
e142c38c | 13419 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 13420 | if (attr) |
aead7601 | 13421 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
13422 | else |
13423 | accessibility = dwarf2_default_access_attribute (die, cu); | |
13424 | switch (accessibility) | |
c906108c | 13425 | { |
60d5a603 JK |
13426 | case DW_ACCESS_private: |
13427 | fnp->is_private = 1; | |
13428 | break; | |
13429 | case DW_ACCESS_protected: | |
13430 | fnp->is_protected = 1; | |
13431 | break; | |
c906108c SS |
13432 | } |
13433 | ||
b02dede2 | 13434 | /* Check for artificial methods. */ |
e142c38c | 13435 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
13436 | if (attr && DW_UNSND (attr) != 0) |
13437 | fnp->is_artificial = 1; | |
13438 | ||
7d27a96d TT |
13439 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
13440 | ||
0d564a31 | 13441 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
13442 | function. For older versions of GCC, this is an offset in the |
13443 | appropriate virtual table, as specified by DW_AT_containing_type. | |
13444 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
13445 | to the object address. */ |
13446 | ||
e142c38c | 13447 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 13448 | if (attr) |
8e19ed76 | 13449 | { |
aec5aa8b | 13450 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 13451 | { |
aec5aa8b TT |
13452 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
13453 | { | |
13454 | /* Old-style GCC. */ | |
13455 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
13456 | } | |
13457 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
13458 | || (DW_BLOCK (attr)->size > 1 | |
13459 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
13460 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
13461 | { | |
aec5aa8b TT |
13462 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
13463 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
13464 | dwarf2_complex_location_expr_complaint (); | |
13465 | else | |
13466 | fnp->voffset /= cu->header.addr_size; | |
13467 | fnp->voffset += 2; | |
13468 | } | |
13469 | else | |
13470 | dwarf2_complex_location_expr_complaint (); | |
13471 | ||
13472 | if (!fnp->fcontext) | |
7e993ebf KS |
13473 | { |
13474 | /* If there is no `this' field and no DW_AT_containing_type, | |
13475 | we cannot actually find a base class context for the | |
13476 | vtable! */ | |
13477 | if (TYPE_NFIELDS (this_type) == 0 | |
13478 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
13479 | { | |
13480 | complaint (&symfile_complaints, | |
13481 | _("cannot determine context for virtual member " | |
13482 | "function \"%s\" (offset %d)"), | |
9c541725 | 13483 | fieldname, to_underlying (die->sect_off)); |
7e993ebf KS |
13484 | } |
13485 | else | |
13486 | { | |
13487 | fnp->fcontext | |
13488 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
13489 | } | |
13490 | } | |
aec5aa8b | 13491 | } |
3690dd37 | 13492 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 13493 | { |
4d3c2250 | 13494 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13495 | } |
13496 | else | |
13497 | { | |
4d3c2250 KB |
13498 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
13499 | fieldname); | |
8e19ed76 | 13500 | } |
0d564a31 | 13501 | } |
d48cc9dd DJ |
13502 | else |
13503 | { | |
13504 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
13505 | if (attr && DW_UNSND (attr)) | |
13506 | { | |
13507 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
13508 | complaint (&symfile_complaints, | |
3e43a32a MS |
13509 | _("Member function \"%s\" (offset %d) is virtual " |
13510 | "but the vtable offset is not specified"), | |
9c541725 | 13511 | fieldname, to_underlying (die->sect_off)); |
9655fd1a | 13512 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
13513 | TYPE_CPLUS_DYNAMIC (type) = 1; |
13514 | } | |
13515 | } | |
c906108c SS |
13516 | } |
13517 | ||
13518 | /* Create the vector of member function fields, and attach it to the type. */ | |
13519 | ||
13520 | static void | |
fba45db2 | 13521 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 13522 | struct dwarf2_cu *cu) |
c906108c SS |
13523 | { |
13524 | struct fnfieldlist *flp; | |
c906108c SS |
13525 | int i; |
13526 | ||
b4ba55a1 | 13527 | if (cu->language == language_ada) |
a73c6dcd | 13528 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 13529 | |
c906108c SS |
13530 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
13531 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
13532 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
13533 | ||
13534 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
13535 | { | |
13536 | struct nextfnfield *nfp = flp->head; | |
13537 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
13538 | int k; | |
13539 | ||
13540 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
13541 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
13542 | fn_flp->fn_fields = (struct fn_field *) | |
13543 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
13544 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 13545 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
13546 | } |
13547 | ||
13548 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
13549 | } |
13550 | ||
1168df01 JB |
13551 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
13552 | language, zero otherwise. */ | |
13553 | static int | |
13554 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
13555 | { | |
13556 | static const char vptr[] = "_vptr"; | |
987504bb | 13557 | static const char vtable[] = "vtable"; |
1168df01 | 13558 | |
9c37b5ae TT |
13559 | /* Look for the C++ form of the vtable. */ |
13560 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
13561 | return 1; |
13562 | ||
13563 | return 0; | |
13564 | } | |
13565 | ||
c0dd20ea | 13566 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
13567 | functions, with the ABI-specified layout. If TYPE describes |
13568 | such a structure, smash it into a member function type. | |
61049d3b DJ |
13569 | |
13570 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
13571 | This is GCC PR debug/28767. */ | |
c0dd20ea | 13572 | |
0b92b5bb TT |
13573 | static void |
13574 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 13575 | { |
09e2d7c7 | 13576 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
13577 | |
13578 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
13579 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
13580 | return; | |
c0dd20ea DJ |
13581 | |
13582 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
13583 | if (TYPE_FIELD_NAME (type, 0) == NULL |
13584 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
13585 | || TYPE_FIELD_NAME (type, 1) == NULL | |
13586 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
13587 | return; | |
c0dd20ea DJ |
13588 | |
13589 | /* Find the type of the method. */ | |
0b92b5bb | 13590 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
13591 | if (pfn_type == NULL |
13592 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
13593 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 13594 | return; |
c0dd20ea DJ |
13595 | |
13596 | /* Look for the "this" argument. */ | |
13597 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
13598 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 13599 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 13600 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 13601 | return; |
c0dd20ea | 13602 | |
09e2d7c7 | 13603 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 13604 | new_type = alloc_type (objfile); |
09e2d7c7 | 13605 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
13606 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
13607 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 13608 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 13609 | } |
1168df01 | 13610 | |
685b1105 | 13611 | |
c906108c | 13612 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
13613 | (definition) to create a type for the structure or union. Fill in |
13614 | the type's name and general properties; the members will not be | |
83655187 DE |
13615 | processed until process_structure_scope. A symbol table entry for |
13616 | the type will also not be done until process_structure_scope (assuming | |
13617 | the type has a name). | |
c906108c | 13618 | |
c767944b DJ |
13619 | NOTE: we need to call these functions regardless of whether or not the |
13620 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 13621 | structure or union. This gets the type entered into our set of |
83655187 | 13622 | user defined types. */ |
c906108c | 13623 | |
f792889a | 13624 | static struct type * |
134d01f1 | 13625 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13626 | { |
e7c27a73 | 13627 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13628 | struct type *type; |
13629 | struct attribute *attr; | |
15d034d0 | 13630 | const char *name; |
c906108c | 13631 | |
348e048f DE |
13632 | /* If the definition of this type lives in .debug_types, read that type. |
13633 | Don't follow DW_AT_specification though, that will take us back up | |
13634 | the chain and we want to go down. */ | |
45e58e77 | 13635 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
13636 | if (attr) |
13637 | { | |
ac9ec31b | 13638 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 13639 | |
ac9ec31b | 13640 | /* The type's CU may not be the same as CU. |
02142a6c | 13641 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
13642 | return set_die_type (die, type, cu); |
13643 | } | |
13644 | ||
c0dd20ea | 13645 | type = alloc_type (objfile); |
c906108c | 13646 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 13647 | |
39cbfefa DJ |
13648 | name = dwarf2_name (die, cu); |
13649 | if (name != NULL) | |
c906108c | 13650 | { |
987504bb | 13651 | if (cu->language == language_cplus |
c44af4eb TT |
13652 | || cu->language == language_d |
13653 | || cu->language == language_rust) | |
63d06c5c | 13654 | { |
15d034d0 | 13655 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
13656 | |
13657 | /* dwarf2_full_name might have already finished building the DIE's | |
13658 | type. If so, there is no need to continue. */ | |
13659 | if (get_die_type (die, cu) != NULL) | |
13660 | return get_die_type (die, cu); | |
13661 | ||
13662 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
13663 | if (die->tag == DW_TAG_structure_type |
13664 | || die->tag == DW_TAG_class_type) | |
13665 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
13666 | } |
13667 | else | |
13668 | { | |
d8151005 DJ |
13669 | /* The name is already allocated along with this objfile, so |
13670 | we don't need to duplicate it for the type. */ | |
7d455152 | 13671 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
13672 | if (die->tag == DW_TAG_class_type) |
13673 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 13674 | } |
c906108c SS |
13675 | } |
13676 | ||
13677 | if (die->tag == DW_TAG_structure_type) | |
13678 | { | |
13679 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
13680 | } | |
13681 | else if (die->tag == DW_TAG_union_type) | |
13682 | { | |
13683 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
13684 | } | |
13685 | else | |
13686 | { | |
4753d33b | 13687 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
13688 | } |
13689 | ||
0cc2414c TT |
13690 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
13691 | TYPE_DECLARED_CLASS (type) = 1; | |
13692 | ||
e142c38c | 13693 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13694 | if (attr) |
13695 | { | |
155bfbd3 JB |
13696 | if (attr_form_is_constant (attr)) |
13697 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13698 | else | |
13699 | { | |
13700 | /* For the moment, dynamic type sizes are not supported | |
13701 | by GDB's struct type. The actual size is determined | |
13702 | on-demand when resolving the type of a given object, | |
13703 | so set the type's length to zero for now. Otherwise, | |
13704 | we record an expression as the length, and that expression | |
13705 | could lead to a very large value, which could eventually | |
13706 | lead to us trying to allocate that much memory when creating | |
13707 | a value of that type. */ | |
13708 | TYPE_LENGTH (type) = 0; | |
13709 | } | |
c906108c SS |
13710 | } |
13711 | else | |
13712 | { | |
13713 | TYPE_LENGTH (type) = 0; | |
13714 | } | |
13715 | ||
5230b05a | 13716 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 13717 | { |
5230b05a WT |
13718 | /* ICC<14 does not output the required DW_AT_declaration on |
13719 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 13720 | TYPE_STUB (type) = 1; |
685b1105 JK |
13721 | } |
13722 | else | |
13723 | TYPE_STUB_SUPPORTED (type) = 1; | |
13724 | ||
dc718098 | 13725 | if (die_is_declaration (die, cu)) |
876cecd0 | 13726 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
13727 | else if (attr == NULL && die->child == NULL |
13728 | && producer_is_realview (cu->producer)) | |
13729 | /* RealView does not output the required DW_AT_declaration | |
13730 | on incomplete types. */ | |
13731 | TYPE_STUB (type) = 1; | |
dc718098 | 13732 | |
c906108c SS |
13733 | /* We need to add the type field to the die immediately so we don't |
13734 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 13735 | type within the structure itself. */ |
1c379e20 | 13736 | set_die_type (die, type, cu); |
c906108c | 13737 | |
7e314c57 JK |
13738 | /* set_die_type should be already done. */ |
13739 | set_descriptive_type (type, die, cu); | |
13740 | ||
c767944b DJ |
13741 | return type; |
13742 | } | |
13743 | ||
13744 | /* Finish creating a structure or union type, including filling in | |
13745 | its members and creating a symbol for it. */ | |
13746 | ||
13747 | static void | |
13748 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13749 | { | |
13750 | struct objfile *objfile = cu->objfile; | |
ca040673 | 13751 | struct die_info *child_die; |
c767944b DJ |
13752 | struct type *type; |
13753 | ||
13754 | type = get_die_type (die, cu); | |
13755 | if (type == NULL) | |
13756 | type = read_structure_type (die, cu); | |
13757 | ||
e142c38c | 13758 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
13759 | { |
13760 | struct field_info fi; | |
34eaf542 | 13761 | VEC (symbolp) *template_args = NULL; |
c767944b | 13762 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
13763 | |
13764 | memset (&fi, 0, sizeof (struct field_info)); | |
13765 | ||
639d11d3 | 13766 | child_die = die->child; |
c906108c SS |
13767 | |
13768 | while (child_die && child_die->tag) | |
13769 | { | |
a9a9bd0f DC |
13770 | if (child_die->tag == DW_TAG_member |
13771 | || child_die->tag == DW_TAG_variable) | |
c906108c | 13772 | { |
a9a9bd0f DC |
13773 | /* NOTE: carlton/2002-11-05: A C++ static data member |
13774 | should be a DW_TAG_member that is a declaration, but | |
13775 | all versions of G++ as of this writing (so through at | |
13776 | least 3.2.1) incorrectly generate DW_TAG_variable | |
13777 | tags for them instead. */ | |
e7c27a73 | 13778 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13779 | } |
8713b1b1 | 13780 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 13781 | { |
e98c9e7c TT |
13782 | /* Rust doesn't have member functions in the C++ sense. |
13783 | However, it does emit ordinary functions as children | |
13784 | of a struct DIE. */ | |
13785 | if (cu->language == language_rust) | |
13786 | read_func_scope (child_die, cu); | |
13787 | else | |
13788 | { | |
13789 | /* C++ member function. */ | |
13790 | dwarf2_add_member_fn (&fi, child_die, type, cu); | |
13791 | } | |
c906108c SS |
13792 | } |
13793 | else if (child_die->tag == DW_TAG_inheritance) | |
13794 | { | |
13795 | /* C++ base class field. */ | |
e7c27a73 | 13796 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 13797 | } |
98751a41 JK |
13798 | else if (child_die->tag == DW_TAG_typedef) |
13799 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
13800 | else if (child_die->tag == DW_TAG_template_type_param |
13801 | || child_die->tag == DW_TAG_template_value_param) | |
13802 | { | |
13803 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13804 | ||
f1078f66 DJ |
13805 | if (arg != NULL) |
13806 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
13807 | } |
13808 | ||
c906108c SS |
13809 | child_die = sibling_die (child_die); |
13810 | } | |
13811 | ||
34eaf542 TT |
13812 | /* Attach template arguments to type. */ |
13813 | if (! VEC_empty (symbolp, template_args)) | |
13814 | { | |
13815 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
13816 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13817 | = VEC_length (symbolp, template_args); | |
13818 | TYPE_TEMPLATE_ARGUMENTS (type) | |
8d749320 SM |
13819 | = XOBNEWVEC (&objfile->objfile_obstack, |
13820 | struct symbol *, | |
13821 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 TT |
13822 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
13823 | VEC_address (symbolp, template_args), | |
13824 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
13825 | * sizeof (struct symbol *))); | |
13826 | VEC_free (symbolp, template_args); | |
13827 | } | |
13828 | ||
c906108c SS |
13829 | /* Attach fields and member functions to the type. */ |
13830 | if (fi.nfields) | |
e7c27a73 | 13831 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
13832 | if (fi.nfnfields) |
13833 | { | |
e7c27a73 | 13834 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 13835 | |
c5aa993b | 13836 | /* Get the type which refers to the base class (possibly this |
c906108c | 13837 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
13838 | class from the DW_AT_containing_type attribute. This use of |
13839 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 13840 | |
e142c38c | 13841 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 13842 | { |
e7c27a73 | 13843 | struct type *t = die_containing_type (die, cu); |
c906108c | 13844 | |
ae6ae975 | 13845 | set_type_vptr_basetype (type, t); |
c906108c SS |
13846 | if (type == t) |
13847 | { | |
c906108c SS |
13848 | int i; |
13849 | ||
13850 | /* Our own class provides vtbl ptr. */ | |
13851 | for (i = TYPE_NFIELDS (t) - 1; | |
13852 | i >= TYPE_N_BASECLASSES (t); | |
13853 | --i) | |
13854 | { | |
0d5cff50 | 13855 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 13856 | |
1168df01 | 13857 | if (is_vtable_name (fieldname, cu)) |
c906108c | 13858 | { |
ae6ae975 | 13859 | set_type_vptr_fieldno (type, i); |
c906108c SS |
13860 | break; |
13861 | } | |
13862 | } | |
13863 | ||
13864 | /* Complain if virtual function table field not found. */ | |
13865 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 13866 | complaint (&symfile_complaints, |
3e43a32a MS |
13867 | _("virtual function table pointer " |
13868 | "not found when defining class '%s'"), | |
4d3c2250 KB |
13869 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
13870 | ""); | |
c906108c SS |
13871 | } |
13872 | else | |
13873 | { | |
ae6ae975 | 13874 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
13875 | } |
13876 | } | |
f6235d4c | 13877 | else if (cu->producer |
61012eef | 13878 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
13879 | { |
13880 | /* The IBM XLC compiler does not provide direct indication | |
13881 | of the containing type, but the vtable pointer is | |
13882 | always named __vfp. */ | |
13883 | ||
13884 | int i; | |
13885 | ||
13886 | for (i = TYPE_NFIELDS (type) - 1; | |
13887 | i >= TYPE_N_BASECLASSES (type); | |
13888 | --i) | |
13889 | { | |
13890 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
13891 | { | |
ae6ae975 DE |
13892 | set_type_vptr_fieldno (type, i); |
13893 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
13894 | break; |
13895 | } | |
13896 | } | |
13897 | } | |
c906108c | 13898 | } |
98751a41 JK |
13899 | |
13900 | /* Copy fi.typedef_field_list linked list elements content into the | |
13901 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
13902 | if (fi.typedef_field_list) | |
13903 | { | |
13904 | int i = fi.typedef_field_list_count; | |
13905 | ||
a0d7a4ff | 13906 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 13907 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
224c3ddb SM |
13908 | = ((struct typedef_field *) |
13909 | TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i)); | |
98751a41 JK |
13910 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; |
13911 | ||
13912 | /* Reverse the list order to keep the debug info elements order. */ | |
13913 | while (--i >= 0) | |
13914 | { | |
13915 | struct typedef_field *dest, *src; | |
6e70227d | 13916 | |
98751a41 JK |
13917 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
13918 | src = &fi.typedef_field_list->field; | |
13919 | fi.typedef_field_list = fi.typedef_field_list->next; | |
13920 | *dest = *src; | |
13921 | } | |
13922 | } | |
c767944b DJ |
13923 | |
13924 | do_cleanups (back_to); | |
c906108c | 13925 | } |
63d06c5c | 13926 | |
bb5ed363 | 13927 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 13928 | |
90aeadfc DC |
13929 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
13930 | snapshots) has been known to create a die giving a declaration | |
13931 | for a class that has, as a child, a die giving a definition for a | |
13932 | nested class. So we have to process our children even if the | |
13933 | current die is a declaration. Normally, of course, a declaration | |
13934 | won't have any children at all. */ | |
134d01f1 | 13935 | |
ca040673 DE |
13936 | child_die = die->child; |
13937 | ||
90aeadfc DC |
13938 | while (child_die != NULL && child_die->tag) |
13939 | { | |
13940 | if (child_die->tag == DW_TAG_member | |
13941 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
13942 | || child_die->tag == DW_TAG_inheritance |
13943 | || child_die->tag == DW_TAG_template_value_param | |
13944 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 13945 | { |
90aeadfc | 13946 | /* Do nothing. */ |
134d01f1 | 13947 | } |
90aeadfc DC |
13948 | else |
13949 | process_die (child_die, cu); | |
134d01f1 | 13950 | |
90aeadfc | 13951 | child_die = sibling_die (child_die); |
134d01f1 DJ |
13952 | } |
13953 | ||
fa4028e9 JB |
13954 | /* Do not consider external references. According to the DWARF standard, |
13955 | these DIEs are identified by the fact that they have no byte_size | |
13956 | attribute, and a declaration attribute. */ | |
13957 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
13958 | || !die_is_declaration (die, cu)) | |
c767944b | 13959 | new_symbol (die, type, cu); |
134d01f1 DJ |
13960 | } |
13961 | ||
55426c9d JB |
13962 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
13963 | update TYPE using some information only available in DIE's children. */ | |
13964 | ||
13965 | static void | |
13966 | update_enumeration_type_from_children (struct die_info *die, | |
13967 | struct type *type, | |
13968 | struct dwarf2_cu *cu) | |
13969 | { | |
60f7655a | 13970 | struct die_info *child_die; |
55426c9d JB |
13971 | int unsigned_enum = 1; |
13972 | int flag_enum = 1; | |
13973 | ULONGEST mask = 0; | |
55426c9d | 13974 | |
8268c778 | 13975 | auto_obstack obstack; |
55426c9d | 13976 | |
60f7655a DE |
13977 | for (child_die = die->child; |
13978 | child_die != NULL && child_die->tag; | |
13979 | child_die = sibling_die (child_die)) | |
55426c9d JB |
13980 | { |
13981 | struct attribute *attr; | |
13982 | LONGEST value; | |
13983 | const gdb_byte *bytes; | |
13984 | struct dwarf2_locexpr_baton *baton; | |
13985 | const char *name; | |
60f7655a | 13986 | |
55426c9d JB |
13987 | if (child_die->tag != DW_TAG_enumerator) |
13988 | continue; | |
13989 | ||
13990 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
13991 | if (attr == NULL) | |
13992 | continue; | |
13993 | ||
13994 | name = dwarf2_name (child_die, cu); | |
13995 | if (name == NULL) | |
13996 | name = "<anonymous enumerator>"; | |
13997 | ||
13998 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
13999 | &value, &bytes, &baton); | |
14000 | if (value < 0) | |
14001 | { | |
14002 | unsigned_enum = 0; | |
14003 | flag_enum = 0; | |
14004 | } | |
14005 | else if ((mask & value) != 0) | |
14006 | flag_enum = 0; | |
14007 | else | |
14008 | mask |= value; | |
14009 | ||
14010 | /* If we already know that the enum type is neither unsigned, nor | |
14011 | a flag type, no need to look at the rest of the enumerates. */ | |
14012 | if (!unsigned_enum && !flag_enum) | |
14013 | break; | |
55426c9d JB |
14014 | } |
14015 | ||
14016 | if (unsigned_enum) | |
14017 | TYPE_UNSIGNED (type) = 1; | |
14018 | if (flag_enum) | |
14019 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
14020 | } |
14021 | ||
134d01f1 DJ |
14022 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
14023 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 14024 | |
f792889a | 14025 | static struct type * |
134d01f1 | 14026 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14027 | { |
e7c27a73 | 14028 | struct objfile *objfile = cu->objfile; |
c906108c | 14029 | struct type *type; |
c906108c | 14030 | struct attribute *attr; |
0114d602 | 14031 | const char *name; |
134d01f1 | 14032 | |
348e048f DE |
14033 | /* If the definition of this type lives in .debug_types, read that type. |
14034 | Don't follow DW_AT_specification though, that will take us back up | |
14035 | the chain and we want to go down. */ | |
45e58e77 | 14036 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
14037 | if (attr) |
14038 | { | |
ac9ec31b | 14039 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 14040 | |
ac9ec31b | 14041 | /* The type's CU may not be the same as CU. |
02142a6c | 14042 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
14043 | return set_die_type (die, type, cu); |
14044 | } | |
14045 | ||
c906108c SS |
14046 | type = alloc_type (objfile); |
14047 | ||
14048 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 14049 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 14050 | if (name != NULL) |
7d455152 | 14051 | TYPE_TAG_NAME (type) = name; |
c906108c | 14052 | |
0626fc76 TT |
14053 | attr = dwarf2_attr (die, DW_AT_type, cu); |
14054 | if (attr != NULL) | |
14055 | { | |
14056 | struct type *underlying_type = die_type (die, cu); | |
14057 | ||
14058 | TYPE_TARGET_TYPE (type) = underlying_type; | |
14059 | } | |
14060 | ||
e142c38c | 14061 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14062 | if (attr) |
14063 | { | |
14064 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14065 | } | |
14066 | else | |
14067 | { | |
14068 | TYPE_LENGTH (type) = 0; | |
14069 | } | |
14070 | ||
137033e9 JB |
14071 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
14072 | declared as private in the package spec, and then defined only | |
14073 | inside the package body. Such types are known as Taft Amendment | |
14074 | Types. When another package uses such a type, an incomplete DIE | |
14075 | may be generated by the compiler. */ | |
02eb380e | 14076 | if (die_is_declaration (die, cu)) |
876cecd0 | 14077 | TYPE_STUB (type) = 1; |
02eb380e | 14078 | |
0626fc76 TT |
14079 | /* Finish the creation of this type by using the enum's children. |
14080 | We must call this even when the underlying type has been provided | |
14081 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
14082 | update_enumeration_type_from_children (die, type, cu); |
14083 | ||
0626fc76 TT |
14084 | /* If this type has an underlying type that is not a stub, then we |
14085 | may use its attributes. We always use the "unsigned" attribute | |
14086 | in this situation, because ordinarily we guess whether the type | |
14087 | is unsigned -- but the guess can be wrong and the underlying type | |
14088 | can tell us the reality. However, we defer to a local size | |
14089 | attribute if one exists, because this lets the compiler override | |
14090 | the underlying type if needed. */ | |
14091 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
14092 | { | |
14093 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
14094 | if (TYPE_LENGTH (type) == 0) | |
14095 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
14096 | } | |
14097 | ||
3d567982 TT |
14098 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
14099 | ||
f792889a | 14100 | return set_die_type (die, type, cu); |
134d01f1 DJ |
14101 | } |
14102 | ||
14103 | /* Given a pointer to a die which begins an enumeration, process all | |
14104 | the dies that define the members of the enumeration, and create the | |
14105 | symbol for the enumeration type. | |
14106 | ||
14107 | NOTE: We reverse the order of the element list. */ | |
14108 | ||
14109 | static void | |
14110 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
14111 | { | |
f792889a | 14112 | struct type *this_type; |
134d01f1 | 14113 | |
f792889a DJ |
14114 | this_type = get_die_type (die, cu); |
14115 | if (this_type == NULL) | |
14116 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 14117 | |
639d11d3 | 14118 | if (die->child != NULL) |
c906108c | 14119 | { |
9dc481d3 DE |
14120 | struct die_info *child_die; |
14121 | struct symbol *sym; | |
14122 | struct field *fields = NULL; | |
14123 | int num_fields = 0; | |
15d034d0 | 14124 | const char *name; |
9dc481d3 | 14125 | |
639d11d3 | 14126 | child_die = die->child; |
c906108c SS |
14127 | while (child_die && child_die->tag) |
14128 | { | |
14129 | if (child_die->tag != DW_TAG_enumerator) | |
14130 | { | |
e7c27a73 | 14131 | process_die (child_die, cu); |
c906108c SS |
14132 | } |
14133 | else | |
14134 | { | |
39cbfefa DJ |
14135 | name = dwarf2_name (child_die, cu); |
14136 | if (name) | |
c906108c | 14137 | { |
f792889a | 14138 | sym = new_symbol (child_die, this_type, cu); |
c906108c SS |
14139 | |
14140 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
14141 | { | |
14142 | fields = (struct field *) | |
14143 | xrealloc (fields, | |
14144 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 14145 | * sizeof (struct field)); |
c906108c SS |
14146 | } |
14147 | ||
3567439c | 14148 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 14149 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 14150 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
14151 | FIELD_BITSIZE (fields[num_fields]) = 0; |
14152 | ||
14153 | num_fields++; | |
14154 | } | |
14155 | } | |
14156 | ||
14157 | child_die = sibling_die (child_die); | |
14158 | } | |
14159 | ||
14160 | if (num_fields) | |
14161 | { | |
f792889a DJ |
14162 | TYPE_NFIELDS (this_type) = num_fields; |
14163 | TYPE_FIELDS (this_type) = (struct field *) | |
14164 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
14165 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 14166 | sizeof (struct field) * num_fields); |
b8c9b27d | 14167 | xfree (fields); |
c906108c | 14168 | } |
c906108c | 14169 | } |
134d01f1 | 14170 | |
6c83ed52 TT |
14171 | /* If we are reading an enum from a .debug_types unit, and the enum |
14172 | is a declaration, and the enum is not the signatured type in the | |
14173 | unit, then we do not want to add a symbol for it. Adding a | |
14174 | symbol would in some cases obscure the true definition of the | |
14175 | enum, giving users an incomplete type when the definition is | |
14176 | actually available. Note that we do not want to do this for all | |
14177 | enums which are just declarations, because C++0x allows forward | |
14178 | enum declarations. */ | |
3019eac3 | 14179 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
14180 | && die_is_declaration (die, cu)) |
14181 | { | |
52dc124a | 14182 | struct signatured_type *sig_type; |
6c83ed52 | 14183 | |
c0f78cd4 | 14184 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
14185 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
14186 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
14187 | return; |
14188 | } | |
14189 | ||
f792889a | 14190 | new_symbol (die, this_type, cu); |
c906108c SS |
14191 | } |
14192 | ||
14193 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
14194 | the DIE's type field. For now, this only handles one dimensional | |
14195 | arrays. */ | |
14196 | ||
f792889a | 14197 | static struct type * |
e7c27a73 | 14198 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14199 | { |
e7c27a73 | 14200 | struct objfile *objfile = cu->objfile; |
c906108c | 14201 | struct die_info *child_die; |
7e314c57 | 14202 | struct type *type; |
c906108c SS |
14203 | struct type *element_type, *range_type, *index_type; |
14204 | struct type **range_types = NULL; | |
14205 | struct attribute *attr; | |
14206 | int ndim = 0; | |
14207 | struct cleanup *back_to; | |
15d034d0 | 14208 | const char *name; |
dc53a7ad | 14209 | unsigned int bit_stride = 0; |
c906108c | 14210 | |
e7c27a73 | 14211 | element_type = die_type (die, cu); |
c906108c | 14212 | |
7e314c57 JK |
14213 | /* The die_type call above may have already set the type for this DIE. */ |
14214 | type = get_die_type (die, cu); | |
14215 | if (type) | |
14216 | return type; | |
14217 | ||
dc53a7ad JB |
14218 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
14219 | if (attr != NULL) | |
14220 | bit_stride = DW_UNSND (attr) * 8; | |
14221 | ||
14222 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
14223 | if (attr != NULL) | |
14224 | bit_stride = DW_UNSND (attr); | |
14225 | ||
c906108c SS |
14226 | /* Irix 6.2 native cc creates array types without children for |
14227 | arrays with unspecified length. */ | |
639d11d3 | 14228 | if (die->child == NULL) |
c906108c | 14229 | { |
46bf5051 | 14230 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14231 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad JB |
14232 | type = create_array_type_with_stride (NULL, element_type, range_type, |
14233 | bit_stride); | |
f792889a | 14234 | return set_die_type (die, type, cu); |
c906108c SS |
14235 | } |
14236 | ||
14237 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 14238 | child_die = die->child; |
c906108c SS |
14239 | while (child_die && child_die->tag) |
14240 | { | |
14241 | if (child_die->tag == DW_TAG_subrange_type) | |
14242 | { | |
f792889a | 14243 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 14244 | |
f792889a | 14245 | if (child_type != NULL) |
a02abb62 | 14246 | { |
0963b4bd MS |
14247 | /* The range type was succesfully read. Save it for the |
14248 | array type creation. */ | |
a02abb62 JB |
14249 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
14250 | { | |
14251 | range_types = (struct type **) | |
14252 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
14253 | * sizeof (struct type *)); | |
14254 | if (ndim == 0) | |
14255 | make_cleanup (free_current_contents, &range_types); | |
14256 | } | |
f792889a | 14257 | range_types[ndim++] = child_type; |
a02abb62 | 14258 | } |
c906108c SS |
14259 | } |
14260 | child_die = sibling_die (child_die); | |
14261 | } | |
14262 | ||
14263 | /* Dwarf2 dimensions are output from left to right, create the | |
14264 | necessary array types in backwards order. */ | |
7ca2d3a3 | 14265 | |
c906108c | 14266 | type = element_type; |
7ca2d3a3 DL |
14267 | |
14268 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
14269 | { | |
14270 | int i = 0; | |
9a619af0 | 14271 | |
7ca2d3a3 | 14272 | while (i < ndim) |
dc53a7ad JB |
14273 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
14274 | bit_stride); | |
7ca2d3a3 DL |
14275 | } |
14276 | else | |
14277 | { | |
14278 | while (ndim-- > 0) | |
dc53a7ad JB |
14279 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
14280 | bit_stride); | |
7ca2d3a3 | 14281 | } |
c906108c | 14282 | |
f5f8a009 EZ |
14283 | /* Understand Dwarf2 support for vector types (like they occur on |
14284 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
14285 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
14286 | custom vendor extension. The main difference between a regular | |
14287 | array and the vector variant is that vectors are passed by value | |
14288 | to functions. */ | |
e142c38c | 14289 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 14290 | if (attr) |
ea37ba09 | 14291 | make_vector_type (type); |
f5f8a009 | 14292 | |
dbc98a8b KW |
14293 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
14294 | implementation may choose to implement triple vectors using this | |
14295 | attribute. */ | |
14296 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
14297 | if (attr) | |
14298 | { | |
14299 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
14300 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14301 | else | |
3e43a32a MS |
14302 | complaint (&symfile_complaints, |
14303 | _("DW_AT_byte_size for array type smaller " | |
14304 | "than the total size of elements")); | |
dbc98a8b KW |
14305 | } |
14306 | ||
39cbfefa DJ |
14307 | name = dwarf2_name (die, cu); |
14308 | if (name) | |
14309 | TYPE_NAME (type) = name; | |
6e70227d | 14310 | |
0963b4bd | 14311 | /* Install the type in the die. */ |
7e314c57 JK |
14312 | set_die_type (die, type, cu); |
14313 | ||
14314 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
14315 | set_descriptive_type (type, die, cu); |
14316 | ||
c906108c SS |
14317 | do_cleanups (back_to); |
14318 | ||
7e314c57 | 14319 | return type; |
c906108c SS |
14320 | } |
14321 | ||
7ca2d3a3 | 14322 | static enum dwarf_array_dim_ordering |
6e70227d | 14323 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
14324 | { |
14325 | struct attribute *attr; | |
14326 | ||
14327 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
14328 | ||
aead7601 SM |
14329 | if (attr) |
14330 | return (enum dwarf_array_dim_ordering) DW_SND (attr); | |
7ca2d3a3 | 14331 | |
0963b4bd MS |
14332 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
14333 | opposite order to the dwarf2 specification, but data is still | |
14334 | laid out as per normal fortran. | |
7ca2d3a3 | 14335 | |
0963b4bd MS |
14336 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
14337 | version checking. */ | |
7ca2d3a3 | 14338 | |
905e0470 PM |
14339 | if (cu->language == language_fortran |
14340 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
14341 | { |
14342 | return DW_ORD_row_major; | |
14343 | } | |
14344 | ||
6e70227d | 14345 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
14346 | { |
14347 | case array_column_major: | |
14348 | return DW_ORD_col_major; | |
14349 | case array_row_major: | |
14350 | default: | |
14351 | return DW_ORD_row_major; | |
14352 | }; | |
14353 | } | |
14354 | ||
72019c9c | 14355 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 14356 | the DIE's type field. */ |
72019c9c | 14357 | |
f792889a | 14358 | static struct type * |
72019c9c GM |
14359 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
14360 | { | |
7e314c57 JK |
14361 | struct type *domain_type, *set_type; |
14362 | struct attribute *attr; | |
f792889a | 14363 | |
7e314c57 JK |
14364 | domain_type = die_type (die, cu); |
14365 | ||
14366 | /* The die_type call above may have already set the type for this DIE. */ | |
14367 | set_type = get_die_type (die, cu); | |
14368 | if (set_type) | |
14369 | return set_type; | |
14370 | ||
14371 | set_type = create_set_type (NULL, domain_type); | |
14372 | ||
14373 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
14374 | if (attr) |
14375 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 14376 | |
f792889a | 14377 | return set_die_type (die, set_type, cu); |
72019c9c | 14378 | } |
7ca2d3a3 | 14379 | |
0971de02 TT |
14380 | /* A helper for read_common_block that creates a locexpr baton. |
14381 | SYM is the symbol which we are marking as computed. | |
14382 | COMMON_DIE is the DIE for the common block. | |
14383 | COMMON_LOC is the location expression attribute for the common | |
14384 | block itself. | |
14385 | MEMBER_LOC is the location expression attribute for the particular | |
14386 | member of the common block that we are processing. | |
14387 | CU is the CU from which the above come. */ | |
14388 | ||
14389 | static void | |
14390 | mark_common_block_symbol_computed (struct symbol *sym, | |
14391 | struct die_info *common_die, | |
14392 | struct attribute *common_loc, | |
14393 | struct attribute *member_loc, | |
14394 | struct dwarf2_cu *cu) | |
14395 | { | |
14396 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14397 | struct dwarf2_locexpr_baton *baton; | |
14398 | gdb_byte *ptr; | |
14399 | unsigned int cu_off; | |
14400 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
14401 | LONGEST offset = 0; | |
14402 | ||
14403 | gdb_assert (common_loc && member_loc); | |
14404 | gdb_assert (attr_form_is_block (common_loc)); | |
14405 | gdb_assert (attr_form_is_block (member_loc) | |
14406 | || attr_form_is_constant (member_loc)); | |
14407 | ||
8d749320 | 14408 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
14409 | baton->per_cu = cu->per_cu; |
14410 | gdb_assert (baton->per_cu); | |
14411 | ||
14412 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
14413 | ||
14414 | if (attr_form_is_constant (member_loc)) | |
14415 | { | |
14416 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
14417 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
14418 | } | |
14419 | else | |
14420 | baton->size += DW_BLOCK (member_loc)->size; | |
14421 | ||
224c3ddb | 14422 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
14423 | baton->data = ptr; |
14424 | ||
14425 | *ptr++ = DW_OP_call4; | |
9c541725 | 14426 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
14427 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
14428 | ptr += 4; | |
14429 | ||
14430 | if (attr_form_is_constant (member_loc)) | |
14431 | { | |
14432 | *ptr++ = DW_OP_addr; | |
14433 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
14434 | ptr += cu->header.addr_size; | |
14435 | } | |
14436 | else | |
14437 | { | |
14438 | /* We have to copy the data here, because DW_OP_call4 will only | |
14439 | use a DW_AT_location attribute. */ | |
14440 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
14441 | ptr += DW_BLOCK (member_loc)->size; | |
14442 | } | |
14443 | ||
14444 | *ptr++ = DW_OP_plus; | |
14445 | gdb_assert (ptr - baton->data == baton->size); | |
14446 | ||
0971de02 | 14447 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 14448 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
14449 | } |
14450 | ||
4357ac6c TT |
14451 | /* Create appropriate locally-scoped variables for all the |
14452 | DW_TAG_common_block entries. Also create a struct common_block | |
14453 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
14454 | is used to sepate the common blocks name namespace from regular | |
14455 | variable names. */ | |
c906108c SS |
14456 | |
14457 | static void | |
e7c27a73 | 14458 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14459 | { |
0971de02 TT |
14460 | struct attribute *attr; |
14461 | ||
14462 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
14463 | if (attr) | |
14464 | { | |
14465 | /* Support the .debug_loc offsets. */ | |
14466 | if (attr_form_is_block (attr)) | |
14467 | { | |
14468 | /* Ok. */ | |
14469 | } | |
14470 | else if (attr_form_is_section_offset (attr)) | |
14471 | { | |
14472 | dwarf2_complex_location_expr_complaint (); | |
14473 | attr = NULL; | |
14474 | } | |
14475 | else | |
14476 | { | |
14477 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
14478 | "common block member"); | |
14479 | attr = NULL; | |
14480 | } | |
14481 | } | |
14482 | ||
639d11d3 | 14483 | if (die->child != NULL) |
c906108c | 14484 | { |
4357ac6c TT |
14485 | struct objfile *objfile = cu->objfile; |
14486 | struct die_info *child_die; | |
14487 | size_t n_entries = 0, size; | |
14488 | struct common_block *common_block; | |
14489 | struct symbol *sym; | |
74ac6d43 | 14490 | |
4357ac6c TT |
14491 | for (child_die = die->child; |
14492 | child_die && child_die->tag; | |
14493 | child_die = sibling_die (child_die)) | |
14494 | ++n_entries; | |
14495 | ||
14496 | size = (sizeof (struct common_block) | |
14497 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
14498 | common_block |
14499 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
14500 | size); | |
4357ac6c TT |
14501 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
14502 | common_block->n_entries = 0; | |
14503 | ||
14504 | for (child_die = die->child; | |
14505 | child_die && child_die->tag; | |
14506 | child_die = sibling_die (child_die)) | |
14507 | { | |
14508 | /* Create the symbol in the DW_TAG_common_block block in the current | |
14509 | symbol scope. */ | |
e7c27a73 | 14510 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
14511 | if (sym != NULL) |
14512 | { | |
14513 | struct attribute *member_loc; | |
14514 | ||
14515 | common_block->contents[common_block->n_entries++] = sym; | |
14516 | ||
14517 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
14518 | cu); | |
14519 | if (member_loc) | |
14520 | { | |
14521 | /* GDB has handled this for a long time, but it is | |
14522 | not specified by DWARF. It seems to have been | |
14523 | emitted by gfortran at least as recently as: | |
14524 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
14525 | complaint (&symfile_complaints, | |
14526 | _("Variable in common block has " | |
14527 | "DW_AT_data_member_location " | |
14528 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 14529 | to_underlying (child_die->sect_off), |
4262abfb | 14530 | objfile_name (cu->objfile)); |
0971de02 TT |
14531 | |
14532 | if (attr_form_is_section_offset (member_loc)) | |
14533 | dwarf2_complex_location_expr_complaint (); | |
14534 | else if (attr_form_is_constant (member_loc) | |
14535 | || attr_form_is_block (member_loc)) | |
14536 | { | |
14537 | if (attr) | |
14538 | mark_common_block_symbol_computed (sym, die, attr, | |
14539 | member_loc, cu); | |
14540 | } | |
14541 | else | |
14542 | dwarf2_complex_location_expr_complaint (); | |
14543 | } | |
14544 | } | |
c906108c | 14545 | } |
4357ac6c TT |
14546 | |
14547 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
14548 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
14549 | } |
14550 | } | |
14551 | ||
0114d602 | 14552 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 14553 | |
0114d602 DJ |
14554 | static struct type * |
14555 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 14556 | { |
e7c27a73 | 14557 | struct objfile *objfile = cu->objfile; |
0114d602 | 14558 | const char *previous_prefix, *name; |
9219021c | 14559 | int is_anonymous; |
0114d602 DJ |
14560 | struct type *type; |
14561 | ||
14562 | /* For extensions, reuse the type of the original namespace. */ | |
14563 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
14564 | { | |
14565 | struct die_info *ext_die; | |
14566 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 14567 | |
0114d602 DJ |
14568 | ext_die = dwarf2_extension (die, &ext_cu); |
14569 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
14570 | |
14571 | /* EXT_CU may not be the same as CU. | |
02142a6c | 14572 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
14573 | return set_die_type (die, type, cu); |
14574 | } | |
9219021c | 14575 | |
e142c38c | 14576 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
14577 | |
14578 | /* Now build the name of the current namespace. */ | |
14579 | ||
0114d602 DJ |
14580 | previous_prefix = determine_prefix (die, cu); |
14581 | if (previous_prefix[0] != '\0') | |
14582 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 14583 | previous_prefix, name, 0, cu); |
0114d602 DJ |
14584 | |
14585 | /* Create the type. */ | |
19f392bc | 14586 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 DJ |
14587 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
14588 | ||
60531b24 | 14589 | return set_die_type (die, type, cu); |
0114d602 DJ |
14590 | } |
14591 | ||
22cee43f | 14592 | /* Read a namespace scope. */ |
0114d602 DJ |
14593 | |
14594 | static void | |
14595 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
14596 | { | |
14597 | struct objfile *objfile = cu->objfile; | |
0114d602 | 14598 | int is_anonymous; |
9219021c | 14599 | |
5c4e30ca DC |
14600 | /* Add a symbol associated to this if we haven't seen the namespace |
14601 | before. Also, add a using directive if it's an anonymous | |
14602 | namespace. */ | |
9219021c | 14603 | |
f2f0e013 | 14604 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
14605 | { |
14606 | struct type *type; | |
14607 | ||
0114d602 | 14608 | type = read_type_die (die, cu); |
e7c27a73 | 14609 | new_symbol (die, type, cu); |
5c4e30ca | 14610 | |
e8e80198 | 14611 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 14612 | if (is_anonymous) |
0114d602 DJ |
14613 | { |
14614 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 14615 | |
eb1e02fd | 14616 | std::vector<const char *> excludes; |
22cee43f PMR |
14617 | add_using_directive (using_directives (cu->language), |
14618 | previous_prefix, TYPE_NAME (type), NULL, | |
eb1e02fd | 14619 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 14620 | } |
5c4e30ca | 14621 | } |
9219021c | 14622 | |
639d11d3 | 14623 | if (die->child != NULL) |
d9fa45fe | 14624 | { |
639d11d3 | 14625 | struct die_info *child_die = die->child; |
6e70227d | 14626 | |
d9fa45fe DC |
14627 | while (child_die && child_die->tag) |
14628 | { | |
e7c27a73 | 14629 | process_die (child_die, cu); |
d9fa45fe DC |
14630 | child_die = sibling_die (child_die); |
14631 | } | |
14632 | } | |
38d518c9 EZ |
14633 | } |
14634 | ||
f55ee35c JK |
14635 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
14636 | imported module. Still we need that type as local Fortran "use ... only" | |
14637 | declaration imports depend on the created type in determine_prefix. */ | |
14638 | ||
14639 | static struct type * | |
14640 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
14641 | { | |
14642 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 14643 | const char *module_name; |
f55ee35c JK |
14644 | struct type *type; |
14645 | ||
14646 | module_name = dwarf2_name (die, cu); | |
14647 | if (!module_name) | |
3e43a32a MS |
14648 | complaint (&symfile_complaints, |
14649 | _("DW_TAG_module has no name, offset 0x%x"), | |
9c541725 | 14650 | to_underlying (die->sect_off)); |
19f392bc | 14651 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c JK |
14652 | |
14653 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
14654 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
14655 | ||
14656 | return set_die_type (die, type, cu); | |
14657 | } | |
14658 | ||
5d7cb8df JK |
14659 | /* Read a Fortran module. */ |
14660 | ||
14661 | static void | |
14662 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
14663 | { | |
14664 | struct die_info *child_die = die->child; | |
530e8392 KB |
14665 | struct type *type; |
14666 | ||
14667 | type = read_type_die (die, cu); | |
14668 | new_symbol (die, type, cu); | |
5d7cb8df | 14669 | |
5d7cb8df JK |
14670 | while (child_die && child_die->tag) |
14671 | { | |
14672 | process_die (child_die, cu); | |
14673 | child_die = sibling_die (child_die); | |
14674 | } | |
14675 | } | |
14676 | ||
38d518c9 EZ |
14677 | /* Return the name of the namespace represented by DIE. Set |
14678 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
14679 | namespace. */ | |
14680 | ||
14681 | static const char * | |
e142c38c | 14682 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
14683 | { |
14684 | struct die_info *current_die; | |
14685 | const char *name = NULL; | |
14686 | ||
14687 | /* Loop through the extensions until we find a name. */ | |
14688 | ||
14689 | for (current_die = die; | |
14690 | current_die != NULL; | |
f2f0e013 | 14691 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 14692 | { |
96553a0c DE |
14693 | /* We don't use dwarf2_name here so that we can detect the absence |
14694 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 14695 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 14696 | |
38d518c9 EZ |
14697 | if (name != NULL) |
14698 | break; | |
14699 | } | |
14700 | ||
14701 | /* Is it an anonymous namespace? */ | |
14702 | ||
14703 | *is_anonymous = (name == NULL); | |
14704 | if (*is_anonymous) | |
2b1dbab0 | 14705 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
14706 | |
14707 | return name; | |
d9fa45fe DC |
14708 | } |
14709 | ||
c906108c SS |
14710 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
14711 | the user defined type vector. */ | |
14712 | ||
f792889a | 14713 | static struct type * |
e7c27a73 | 14714 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14715 | { |
5e2b427d | 14716 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 14717 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 14718 | struct type *type; |
8b2dbe47 KB |
14719 | struct attribute *attr_byte_size; |
14720 | struct attribute *attr_address_class; | |
14721 | int byte_size, addr_class; | |
7e314c57 JK |
14722 | struct type *target_type; |
14723 | ||
14724 | target_type = die_type (die, cu); | |
c906108c | 14725 | |
7e314c57 JK |
14726 | /* The die_type call above may have already set the type for this DIE. */ |
14727 | type = get_die_type (die, cu); | |
14728 | if (type) | |
14729 | return type; | |
14730 | ||
14731 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 14732 | |
e142c38c | 14733 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
14734 | if (attr_byte_size) |
14735 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 14736 | else |
8b2dbe47 KB |
14737 | byte_size = cu_header->addr_size; |
14738 | ||
e142c38c | 14739 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
14740 | if (attr_address_class) |
14741 | addr_class = DW_UNSND (attr_address_class); | |
14742 | else | |
14743 | addr_class = DW_ADDR_none; | |
14744 | ||
14745 | /* If the pointer size or address class is different than the | |
14746 | default, create a type variant marked as such and set the | |
14747 | length accordingly. */ | |
14748 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 14749 | { |
5e2b427d | 14750 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
14751 | { |
14752 | int type_flags; | |
14753 | ||
849957d9 | 14754 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 14755 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
14756 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
14757 | == 0); | |
8b2dbe47 KB |
14758 | type = make_type_with_address_space (type, type_flags); |
14759 | } | |
14760 | else if (TYPE_LENGTH (type) != byte_size) | |
14761 | { | |
3e43a32a MS |
14762 | complaint (&symfile_complaints, |
14763 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 14764 | } |
6e70227d | 14765 | else |
9a619af0 MS |
14766 | { |
14767 | /* Should we also complain about unhandled address classes? */ | |
14768 | } | |
c906108c | 14769 | } |
8b2dbe47 KB |
14770 | |
14771 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 14772 | return set_die_type (die, type, cu); |
c906108c SS |
14773 | } |
14774 | ||
14775 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
14776 | the user defined type vector. */ | |
14777 | ||
f792889a | 14778 | static struct type * |
e7c27a73 | 14779 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
14780 | { |
14781 | struct type *type; | |
14782 | struct type *to_type; | |
14783 | struct type *domain; | |
14784 | ||
e7c27a73 DJ |
14785 | to_type = die_type (die, cu); |
14786 | domain = die_containing_type (die, cu); | |
0d5de010 | 14787 | |
7e314c57 JK |
14788 | /* The calls above may have already set the type for this DIE. */ |
14789 | type = get_die_type (die, cu); | |
14790 | if (type) | |
14791 | return type; | |
14792 | ||
0d5de010 DJ |
14793 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
14794 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
14795 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
14796 | { | |
14797 | struct type *new_type = alloc_type (cu->objfile); | |
14798 | ||
14799 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
14800 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
14801 | TYPE_VARARGS (to_type)); | |
14802 | type = lookup_methodptr_type (new_type); | |
14803 | } | |
0d5de010 DJ |
14804 | else |
14805 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 14806 | |
f792889a | 14807 | return set_die_type (die, type, cu); |
c906108c SS |
14808 | } |
14809 | ||
4297a3f0 | 14810 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
14811 | the user defined type vector. */ |
14812 | ||
f792889a | 14813 | static struct type * |
4297a3f0 AV |
14814 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
14815 | enum type_code refcode) | |
c906108c | 14816 | { |
e7c27a73 | 14817 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 14818 | struct type *type, *target_type; |
c906108c SS |
14819 | struct attribute *attr; |
14820 | ||
4297a3f0 AV |
14821 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
14822 | ||
7e314c57 JK |
14823 | target_type = die_type (die, cu); |
14824 | ||
14825 | /* The die_type call above may have already set the type for this DIE. */ | |
14826 | type = get_die_type (die, cu); | |
14827 | if (type) | |
14828 | return type; | |
14829 | ||
4297a3f0 | 14830 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 14831 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
14832 | if (attr) |
14833 | { | |
14834 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
14835 | } | |
14836 | else | |
14837 | { | |
107d2387 | 14838 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 14839 | } |
f792889a | 14840 | return set_die_type (die, type, cu); |
c906108c SS |
14841 | } |
14842 | ||
cf363f18 MW |
14843 | /* Add the given cv-qualifiers to the element type of the array. GCC |
14844 | outputs DWARF type qualifiers that apply to an array, not the | |
14845 | element type. But GDB relies on the array element type to carry | |
14846 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
14847 | specification. */ | |
14848 | ||
14849 | static struct type * | |
14850 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
14851 | struct type *base_type, int cnst, int voltl) | |
14852 | { | |
14853 | struct type *el_type, *inner_array; | |
14854 | ||
14855 | base_type = copy_type (base_type); | |
14856 | inner_array = base_type; | |
14857 | ||
14858 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
14859 | { | |
14860 | TYPE_TARGET_TYPE (inner_array) = | |
14861 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
14862 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
14863 | } | |
14864 | ||
14865 | el_type = TYPE_TARGET_TYPE (inner_array); | |
14866 | cnst |= TYPE_CONST (el_type); | |
14867 | voltl |= TYPE_VOLATILE (el_type); | |
14868 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
14869 | ||
14870 | return set_die_type (die, base_type, cu); | |
14871 | } | |
14872 | ||
f792889a | 14873 | static struct type * |
e7c27a73 | 14874 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14875 | { |
f792889a | 14876 | struct type *base_type, *cv_type; |
c906108c | 14877 | |
e7c27a73 | 14878 | base_type = die_type (die, cu); |
7e314c57 JK |
14879 | |
14880 | /* The die_type call above may have already set the type for this DIE. */ | |
14881 | cv_type = get_die_type (die, cu); | |
14882 | if (cv_type) | |
14883 | return cv_type; | |
14884 | ||
2f608a3a KW |
14885 | /* In case the const qualifier is applied to an array type, the element type |
14886 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
14887 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 14888 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 14889 | |
f792889a DJ |
14890 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
14891 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14892 | } |
14893 | ||
f792889a | 14894 | static struct type * |
e7c27a73 | 14895 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14896 | { |
f792889a | 14897 | struct type *base_type, *cv_type; |
c906108c | 14898 | |
e7c27a73 | 14899 | base_type = die_type (die, cu); |
7e314c57 JK |
14900 | |
14901 | /* The die_type call above may have already set the type for this DIE. */ | |
14902 | cv_type = get_die_type (die, cu); | |
14903 | if (cv_type) | |
14904 | return cv_type; | |
14905 | ||
cf363f18 MW |
14906 | /* In case the volatile qualifier is applied to an array type, the |
14907 | element type is so qualified, not the array type (section 6.7.3 | |
14908 | of C99). */ | |
14909 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
14910 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
14911 | ||
f792889a DJ |
14912 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
14913 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
14914 | } |
14915 | ||
06d66ee9 TT |
14916 | /* Handle DW_TAG_restrict_type. */ |
14917 | ||
14918 | static struct type * | |
14919 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
14920 | { | |
14921 | struct type *base_type, *cv_type; | |
14922 | ||
14923 | base_type = die_type (die, cu); | |
14924 | ||
14925 | /* The die_type call above may have already set the type for this DIE. */ | |
14926 | cv_type = get_die_type (die, cu); | |
14927 | if (cv_type) | |
14928 | return cv_type; | |
14929 | ||
14930 | cv_type = make_restrict_type (base_type); | |
14931 | return set_die_type (die, cv_type, cu); | |
14932 | } | |
14933 | ||
a2c2acaf MW |
14934 | /* Handle DW_TAG_atomic_type. */ |
14935 | ||
14936 | static struct type * | |
14937 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
14938 | { | |
14939 | struct type *base_type, *cv_type; | |
14940 | ||
14941 | base_type = die_type (die, cu); | |
14942 | ||
14943 | /* The die_type call above may have already set the type for this DIE. */ | |
14944 | cv_type = get_die_type (die, cu); | |
14945 | if (cv_type) | |
14946 | return cv_type; | |
14947 | ||
14948 | cv_type = make_atomic_type (base_type); | |
14949 | return set_die_type (die, cv_type, cu); | |
14950 | } | |
14951 | ||
c906108c SS |
14952 | /* Extract all information from a DW_TAG_string_type DIE and add to |
14953 | the user defined type vector. It isn't really a user defined type, | |
14954 | but it behaves like one, with other DIE's using an AT_user_def_type | |
14955 | attribute to reference it. */ | |
14956 | ||
f792889a | 14957 | static struct type * |
e7c27a73 | 14958 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 14959 | { |
e7c27a73 | 14960 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 14961 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14962 | struct type *type, *range_type, *index_type, *char_type; |
14963 | struct attribute *attr; | |
14964 | unsigned int length; | |
14965 | ||
e142c38c | 14966 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
14967 | if (attr) |
14968 | { | |
14969 | length = DW_UNSND (attr); | |
14970 | } | |
14971 | else | |
14972 | { | |
0963b4bd | 14973 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 14974 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
14975 | if (attr) |
14976 | { | |
14977 | length = DW_UNSND (attr); | |
14978 | } | |
14979 | else | |
14980 | { | |
14981 | length = 1; | |
14982 | } | |
c906108c | 14983 | } |
6ccb9162 | 14984 | |
46bf5051 | 14985 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 14986 | range_type = create_static_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
14987 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
14988 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 14989 | |
f792889a | 14990 | return set_die_type (die, type, cu); |
c906108c SS |
14991 | } |
14992 | ||
4d804846 JB |
14993 | /* Assuming that DIE corresponds to a function, returns nonzero |
14994 | if the function is prototyped. */ | |
14995 | ||
14996 | static int | |
14997 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
14998 | { | |
14999 | struct attribute *attr; | |
15000 | ||
15001 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
15002 | if (attr && (DW_UNSND (attr) != 0)) | |
15003 | return 1; | |
15004 | ||
15005 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
15006 | is only meaninful for C, but the concept also extends to other | |
15007 | languages that allow unprototyped functions (Eg: Objective C). | |
15008 | For all other languages, assume that functions are always | |
15009 | prototyped. */ | |
15010 | if (cu->language != language_c | |
15011 | && cu->language != language_objc | |
15012 | && cu->language != language_opencl) | |
15013 | return 1; | |
15014 | ||
15015 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
15016 | prototyped and unprototyped functions; default to prototyped, | |
15017 | since that is more common in modern code (and RealView warns | |
15018 | about unprototyped functions). */ | |
15019 | if (producer_is_realview (cu->producer)) | |
15020 | return 1; | |
15021 | ||
15022 | return 0; | |
15023 | } | |
15024 | ||
c906108c SS |
15025 | /* Handle DIES due to C code like: |
15026 | ||
15027 | struct foo | |
c5aa993b JM |
15028 | { |
15029 | int (*funcp)(int a, long l); | |
15030 | int b; | |
15031 | }; | |
c906108c | 15032 | |
0963b4bd | 15033 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 15034 | |
f792889a | 15035 | static struct type * |
e7c27a73 | 15036 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15037 | { |
bb5ed363 | 15038 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
15039 | struct type *type; /* Type that this function returns. */ |
15040 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
15041 | struct attribute *attr; |
15042 | ||
e7c27a73 | 15043 | type = die_type (die, cu); |
7e314c57 JK |
15044 | |
15045 | /* The die_type call above may have already set the type for this DIE. */ | |
15046 | ftype = get_die_type (die, cu); | |
15047 | if (ftype) | |
15048 | return ftype; | |
15049 | ||
0c8b41f1 | 15050 | ftype = lookup_function_type (type); |
c906108c | 15051 | |
4d804846 | 15052 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 15053 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 15054 | |
c055b101 CV |
15055 | /* Store the calling convention in the type if it's available in |
15056 | the subroutine die. Otherwise set the calling convention to | |
15057 | the default value DW_CC_normal. */ | |
15058 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
15059 | if (attr) |
15060 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
15061 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
15062 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
15063 | else | |
15064 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 15065 | |
743649fd MW |
15066 | /* Record whether the function returns normally to its caller or not |
15067 | if the DWARF producer set that information. */ | |
15068 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
15069 | if (attr && (DW_UNSND (attr) != 0)) | |
15070 | TYPE_NO_RETURN (ftype) = 1; | |
15071 | ||
76c10ea2 GM |
15072 | /* We need to add the subroutine type to the die immediately so |
15073 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 15074 | declared as the same subroutine type. */ |
76c10ea2 | 15075 | set_die_type (die, ftype, cu); |
6e70227d | 15076 | |
639d11d3 | 15077 | if (die->child != NULL) |
c906108c | 15078 | { |
bb5ed363 | 15079 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 15080 | struct die_info *child_die; |
8072405b | 15081 | int nparams, iparams; |
c906108c SS |
15082 | |
15083 | /* Count the number of parameters. | |
15084 | FIXME: GDB currently ignores vararg functions, but knows about | |
15085 | vararg member functions. */ | |
8072405b | 15086 | nparams = 0; |
639d11d3 | 15087 | child_die = die->child; |
c906108c SS |
15088 | while (child_die && child_die->tag) |
15089 | { | |
15090 | if (child_die->tag == DW_TAG_formal_parameter) | |
15091 | nparams++; | |
15092 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 15093 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
15094 | child_die = sibling_die (child_die); |
15095 | } | |
15096 | ||
15097 | /* Allocate storage for parameters and fill them in. */ | |
15098 | TYPE_NFIELDS (ftype) = nparams; | |
15099 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 15100 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 15101 | |
8072405b JK |
15102 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
15103 | even if we error out during the parameters reading below. */ | |
15104 | for (iparams = 0; iparams < nparams; iparams++) | |
15105 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
15106 | ||
15107 | iparams = 0; | |
639d11d3 | 15108 | child_die = die->child; |
c906108c SS |
15109 | while (child_die && child_die->tag) |
15110 | { | |
15111 | if (child_die->tag == DW_TAG_formal_parameter) | |
15112 | { | |
3ce3b1ba PA |
15113 | struct type *arg_type; |
15114 | ||
15115 | /* DWARF version 2 has no clean way to discern C++ | |
15116 | static and non-static member functions. G++ helps | |
15117 | GDB by marking the first parameter for non-static | |
15118 | member functions (which is the this pointer) as | |
15119 | artificial. We pass this information to | |
15120 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
15121 | ||
15122 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
15123 | 4.5 does not yet generate. */ | |
e142c38c | 15124 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
15125 | if (attr) |
15126 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
15127 | else | |
9c37b5ae | 15128 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
15129 | arg_type = die_type (child_die, cu); |
15130 | ||
15131 | /* RealView does not mark THIS as const, which the testsuite | |
15132 | expects. GCC marks THIS as const in method definitions, | |
15133 | but not in the class specifications (GCC PR 43053). */ | |
15134 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
15135 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
15136 | { | |
15137 | int is_this = 0; | |
15138 | struct dwarf2_cu *arg_cu = cu; | |
15139 | const char *name = dwarf2_name (child_die, cu); | |
15140 | ||
15141 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
15142 | if (attr) | |
15143 | { | |
15144 | /* If the compiler emits this, use it. */ | |
15145 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
15146 | is_this = 1; | |
15147 | } | |
15148 | else if (name && strcmp (name, "this") == 0) | |
15149 | /* Function definitions will have the argument names. */ | |
15150 | is_this = 1; | |
15151 | else if (name == NULL && iparams == 0) | |
15152 | /* Declarations may not have the names, so like | |
15153 | elsewhere in GDB, assume an artificial first | |
15154 | argument is "this". */ | |
15155 | is_this = 1; | |
15156 | ||
15157 | if (is_this) | |
15158 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
15159 | arg_type, 0); | |
15160 | } | |
15161 | ||
15162 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
15163 | iparams++; |
15164 | } | |
15165 | child_die = sibling_die (child_die); | |
15166 | } | |
15167 | } | |
15168 | ||
76c10ea2 | 15169 | return ftype; |
c906108c SS |
15170 | } |
15171 | ||
f792889a | 15172 | static struct type * |
e7c27a73 | 15173 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15174 | { |
e7c27a73 | 15175 | struct objfile *objfile = cu->objfile; |
0114d602 | 15176 | const char *name = NULL; |
3c8e0968 | 15177 | struct type *this_type, *target_type; |
c906108c | 15178 | |
94af9270 | 15179 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
15180 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
15181 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 15182 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
15183 | target_type = die_type (die, cu); |
15184 | if (target_type != this_type) | |
15185 | TYPE_TARGET_TYPE (this_type) = target_type; | |
15186 | else | |
15187 | { | |
15188 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
15189 | spec and cause infinite loops in GDB. */ | |
15190 | complaint (&symfile_complaints, | |
15191 | _("Self-referential DW_TAG_typedef " | |
15192 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15193 | to_underlying (die->sect_off), objfile_name (objfile)); |
3c8e0968 DE |
15194 | TYPE_TARGET_TYPE (this_type) = NULL; |
15195 | } | |
f792889a | 15196 | return this_type; |
c906108c SS |
15197 | } |
15198 | ||
9b790ce7 UW |
15199 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
15200 | (which may be different from NAME) to the architecture back-end to allow | |
15201 | it to guess the correct format if necessary. */ | |
15202 | ||
15203 | static struct type * | |
15204 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
15205 | const char *name_hint) | |
15206 | { | |
15207 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15208 | const struct floatformat **format; | |
15209 | struct type *type; | |
15210 | ||
15211 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
15212 | if (format) | |
15213 | type = init_float_type (objfile, bits, name, format); | |
15214 | else | |
15215 | type = init_type (objfile, TYPE_CODE_ERROR, bits / TARGET_CHAR_BIT, name); | |
15216 | ||
15217 | return type; | |
15218 | } | |
15219 | ||
c906108c SS |
15220 | /* Find a representation of a given base type and install |
15221 | it in the TYPE field of the die. */ | |
15222 | ||
f792889a | 15223 | static struct type * |
e7c27a73 | 15224 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15225 | { |
e7c27a73 | 15226 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15227 | struct type *type; |
15228 | struct attribute *attr; | |
19f392bc | 15229 | int encoding = 0, bits = 0; |
15d034d0 | 15230 | const char *name; |
c906108c | 15231 | |
e142c38c | 15232 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
15233 | if (attr) |
15234 | { | |
15235 | encoding = DW_UNSND (attr); | |
15236 | } | |
e142c38c | 15237 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
15238 | if (attr) |
15239 | { | |
19f392bc | 15240 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
c906108c | 15241 | } |
39cbfefa | 15242 | name = dwarf2_name (die, cu); |
6ccb9162 | 15243 | if (!name) |
c906108c | 15244 | { |
6ccb9162 UW |
15245 | complaint (&symfile_complaints, |
15246 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 15247 | } |
6ccb9162 UW |
15248 | |
15249 | switch (encoding) | |
c906108c | 15250 | { |
6ccb9162 UW |
15251 | case DW_ATE_address: |
15252 | /* Turn DW_ATE_address into a void * pointer. */ | |
19f392bc UW |
15253 | type = init_type (objfile, TYPE_CODE_VOID, 1, NULL); |
15254 | type = init_pointer_type (objfile, bits, name, type); | |
6ccb9162 UW |
15255 | break; |
15256 | case DW_ATE_boolean: | |
19f392bc | 15257 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
15258 | break; |
15259 | case DW_ATE_complex_float: | |
9b790ce7 | 15260 | type = dwarf2_init_float_type (objfile, bits / 2, NULL, name); |
19f392bc | 15261 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
15262 | break; |
15263 | case DW_ATE_decimal_float: | |
19f392bc | 15264 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
15265 | break; |
15266 | case DW_ATE_float: | |
9b790ce7 | 15267 | type = dwarf2_init_float_type (objfile, bits, name, name); |
6ccb9162 UW |
15268 | break; |
15269 | case DW_ATE_signed: | |
19f392bc | 15270 | type = init_integer_type (objfile, bits, 0, name); |
6ccb9162 UW |
15271 | break; |
15272 | case DW_ATE_unsigned: | |
3b2b8fea TT |
15273 | if (cu->language == language_fortran |
15274 | && name | |
61012eef | 15275 | && startswith (name, "character(")) |
19f392bc UW |
15276 | type = init_character_type (objfile, bits, 1, name); |
15277 | else | |
15278 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 UW |
15279 | break; |
15280 | case DW_ATE_signed_char: | |
6e70227d | 15281 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
15282 | || cu->language == language_pascal |
15283 | || cu->language == language_fortran) | |
19f392bc UW |
15284 | type = init_character_type (objfile, bits, 0, name); |
15285 | else | |
15286 | type = init_integer_type (objfile, bits, 0, name); | |
6ccb9162 UW |
15287 | break; |
15288 | case DW_ATE_unsigned_char: | |
868a0084 | 15289 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 15290 | || cu->language == language_pascal |
c44af4eb TT |
15291 | || cu->language == language_fortran |
15292 | || cu->language == language_rust) | |
19f392bc UW |
15293 | type = init_character_type (objfile, bits, 1, name); |
15294 | else | |
15295 | type = init_integer_type (objfile, bits, 1, name); | |
6ccb9162 | 15296 | break; |
75079b2b | 15297 | case DW_ATE_UTF: |
53e710ac PA |
15298 | { |
15299 | gdbarch *arch = get_objfile_arch (objfile); | |
15300 | ||
15301 | if (bits == 16) | |
15302 | type = builtin_type (arch)->builtin_char16; | |
15303 | else if (bits == 32) | |
15304 | type = builtin_type (arch)->builtin_char32; | |
15305 | else | |
15306 | { | |
15307 | complaint (&symfile_complaints, | |
15308 | _("unsupported DW_ATE_UTF bit size: '%d'"), | |
15309 | bits); | |
15310 | type = init_integer_type (objfile, bits, 1, name); | |
15311 | } | |
15312 | return set_die_type (die, type, cu); | |
15313 | } | |
75079b2b TT |
15314 | break; |
15315 | ||
6ccb9162 UW |
15316 | default: |
15317 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
15318 | dwarf_type_encoding_name (encoding)); | |
19f392bc UW |
15319 | type = init_type (objfile, TYPE_CODE_ERROR, |
15320 | bits / TARGET_CHAR_BIT, name); | |
6ccb9162 | 15321 | break; |
c906108c | 15322 | } |
6ccb9162 | 15323 | |
0114d602 | 15324 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 15325 | TYPE_NOSIGN (type) = 1; |
0114d602 | 15326 | |
f792889a | 15327 | return set_die_type (die, type, cu); |
c906108c SS |
15328 | } |
15329 | ||
80180f79 SA |
15330 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
15331 | resulting value of the attribute into struct bound_prop. | |
15332 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
15333 | ||
15334 | static int | |
15335 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
15336 | struct dwarf2_cu *cu, struct dynamic_prop *prop) | |
15337 | { | |
15338 | struct dwarf2_property_baton *baton; | |
15339 | struct obstack *obstack = &cu->objfile->objfile_obstack; | |
15340 | ||
15341 | if (attr == NULL || prop == NULL) | |
15342 | return 0; | |
15343 | ||
15344 | if (attr_form_is_block (attr)) | |
15345 | { | |
8d749320 | 15346 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
80180f79 SA |
15347 | baton->referenced_type = NULL; |
15348 | baton->locexpr.per_cu = cu->per_cu; | |
15349 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
15350 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
15351 | prop->data.baton = baton; | |
15352 | prop->kind = PROP_LOCEXPR; | |
15353 | gdb_assert (prop->data.baton != NULL); | |
15354 | } | |
15355 | else if (attr_form_is_ref (attr)) | |
15356 | { | |
15357 | struct dwarf2_cu *target_cu = cu; | |
15358 | struct die_info *target_die; | |
15359 | struct attribute *target_attr; | |
15360 | ||
15361 | target_die = follow_die_ref (die, attr, &target_cu); | |
15362 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
15363 | if (target_attr == NULL) |
15364 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
15365 | target_cu); | |
80180f79 SA |
15366 | if (target_attr == NULL) |
15367 | return 0; | |
15368 | ||
df25ebbd | 15369 | switch (target_attr->name) |
80180f79 | 15370 | { |
df25ebbd JB |
15371 | case DW_AT_location: |
15372 | if (attr_form_is_section_offset (target_attr)) | |
15373 | { | |
8d749320 | 15374 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15375 | baton->referenced_type = die_type (target_die, target_cu); |
15376 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); | |
15377 | prop->data.baton = baton; | |
15378 | prop->kind = PROP_LOCLIST; | |
15379 | gdb_assert (prop->data.baton != NULL); | |
15380 | } | |
15381 | else if (attr_form_is_block (target_attr)) | |
15382 | { | |
8d749320 | 15383 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
df25ebbd JB |
15384 | baton->referenced_type = die_type (target_die, target_cu); |
15385 | baton->locexpr.per_cu = cu->per_cu; | |
15386 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
15387 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
15388 | prop->data.baton = baton; | |
15389 | prop->kind = PROP_LOCEXPR; | |
15390 | gdb_assert (prop->data.baton != NULL); | |
15391 | } | |
15392 | else | |
15393 | { | |
15394 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
15395 | "dynamic property"); | |
15396 | return 0; | |
15397 | } | |
15398 | break; | |
15399 | case DW_AT_data_member_location: | |
15400 | { | |
15401 | LONGEST offset; | |
15402 | ||
15403 | if (!handle_data_member_location (target_die, target_cu, | |
15404 | &offset)) | |
15405 | return 0; | |
15406 | ||
8d749320 | 15407 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
6ad395a7 JB |
15408 | baton->referenced_type = read_type_die (target_die->parent, |
15409 | target_cu); | |
df25ebbd JB |
15410 | baton->offset_info.offset = offset; |
15411 | baton->offset_info.type = die_type (target_die, target_cu); | |
15412 | prop->data.baton = baton; | |
15413 | prop->kind = PROP_ADDR_OFFSET; | |
15414 | break; | |
15415 | } | |
80180f79 SA |
15416 | } |
15417 | } | |
15418 | else if (attr_form_is_constant (attr)) | |
15419 | { | |
15420 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
15421 | prop->kind = PROP_CONST; | |
15422 | } | |
15423 | else | |
15424 | { | |
15425 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
15426 | dwarf2_name (die, cu)); | |
15427 | return 0; | |
15428 | } | |
15429 | ||
15430 | return 1; | |
15431 | } | |
15432 | ||
a02abb62 JB |
15433 | /* Read the given DW_AT_subrange DIE. */ |
15434 | ||
f792889a | 15435 | static struct type * |
a02abb62 JB |
15436 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
15437 | { | |
4c9ad8c2 | 15438 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
15439 | struct type *range_type; |
15440 | struct attribute *attr; | |
729efb13 | 15441 | struct dynamic_prop low, high; |
4fae6e18 | 15442 | int low_default_is_valid; |
c451ebe5 | 15443 | int high_bound_is_count = 0; |
15d034d0 | 15444 | const char *name; |
43bbcdc2 | 15445 | LONGEST negative_mask; |
e77813c8 | 15446 | |
4c9ad8c2 TT |
15447 | orig_base_type = die_type (die, cu); |
15448 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
15449 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
15450 | creating the range type, but we use the result of check_typedef | |
15451 | when examining properties of the type. */ | |
15452 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 15453 | |
7e314c57 JK |
15454 | /* The die_type call above may have already set the type for this DIE. */ |
15455 | range_type = get_die_type (die, cu); | |
15456 | if (range_type) | |
15457 | return range_type; | |
15458 | ||
729efb13 SA |
15459 | low.kind = PROP_CONST; |
15460 | high.kind = PROP_CONST; | |
15461 | high.data.const_val = 0; | |
15462 | ||
4fae6e18 JK |
15463 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
15464 | omitting DW_AT_lower_bound. */ | |
15465 | switch (cu->language) | |
6e70227d | 15466 | { |
4fae6e18 JK |
15467 | case language_c: |
15468 | case language_cplus: | |
729efb13 | 15469 | low.data.const_val = 0; |
4fae6e18 JK |
15470 | low_default_is_valid = 1; |
15471 | break; | |
15472 | case language_fortran: | |
729efb13 | 15473 | low.data.const_val = 1; |
4fae6e18 JK |
15474 | low_default_is_valid = 1; |
15475 | break; | |
15476 | case language_d: | |
4fae6e18 | 15477 | case language_objc: |
c44af4eb | 15478 | case language_rust: |
729efb13 | 15479 | low.data.const_val = 0; |
4fae6e18 JK |
15480 | low_default_is_valid = (cu->header.version >= 4); |
15481 | break; | |
15482 | case language_ada: | |
15483 | case language_m2: | |
15484 | case language_pascal: | |
729efb13 | 15485 | low.data.const_val = 1; |
4fae6e18 JK |
15486 | low_default_is_valid = (cu->header.version >= 4); |
15487 | break; | |
15488 | default: | |
729efb13 | 15489 | low.data.const_val = 0; |
4fae6e18 JK |
15490 | low_default_is_valid = 0; |
15491 | break; | |
a02abb62 JB |
15492 | } |
15493 | ||
e142c38c | 15494 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 15495 | if (attr) |
11c1ba78 | 15496 | attr_to_dynamic_prop (attr, die, cu, &low); |
4fae6e18 JK |
15497 | else if (!low_default_is_valid) |
15498 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
15499 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 15500 | to_underlying (die->sect_off), objfile_name (cu->objfile)); |
a02abb62 | 15501 | |
e142c38c | 15502 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
80180f79 | 15503 | if (!attr_to_dynamic_prop (attr, die, cu, &high)) |
e77813c8 PM |
15504 | { |
15505 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
c451ebe5 | 15506 | if (attr_to_dynamic_prop (attr, die, cu, &high)) |
6b662e19 | 15507 | { |
c451ebe5 SA |
15508 | /* If bounds are constant do the final calculation here. */ |
15509 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
15510 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
15511 | else | |
15512 | high_bound_is_count = 1; | |
c2ff108b | 15513 | } |
e77813c8 PM |
15514 | } |
15515 | ||
15516 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
15517 | without specifying a base type. | |
15518 | In that case, the base type must be set to the type of | |
15519 | the lower bound, upper bound or count, in that order, if any of these | |
15520 | three attributes references an object that has a type. | |
15521 | If no base type is found, the Dwarf-2 specifications say that | |
15522 | a signed integer type of size equal to the size of an address should | |
15523 | be used. | |
15524 | For the following C code: `extern char gdb_int [];' | |
15525 | GCC produces an empty range DIE. | |
15526 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 15527 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
15528 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
15529 | { | |
15530 | struct objfile *objfile = cu->objfile; | |
15531 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
15532 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
15533 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
15534 | ||
15535 | /* Test "int", "long int", and "long long int" objfile types, | |
15536 | and select the first one having a size above or equal to the | |
15537 | architecture address size. */ | |
15538 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15539 | base_type = int_type; | |
15540 | else | |
15541 | { | |
15542 | int_type = objfile_type (objfile)->builtin_long; | |
15543 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15544 | base_type = int_type; | |
15545 | else | |
15546 | { | |
15547 | int_type = objfile_type (objfile)->builtin_long_long; | |
15548 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
15549 | base_type = int_type; | |
15550 | } | |
15551 | } | |
15552 | } | |
a02abb62 | 15553 | |
dbb9c2b1 JB |
15554 | /* Normally, the DWARF producers are expected to use a signed |
15555 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
15556 | But this is unfortunately not always the case, as witnessed | |
15557 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
15558 | is used instead. To work around that ambiguity, we treat | |
15559 | the bounds as signed, and thus sign-extend their values, when | |
15560 | the base type is signed. */ | |
6e70227d | 15561 | negative_mask = |
66c6502d | 15562 | -((LONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
15563 | if (low.kind == PROP_CONST |
15564 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
15565 | low.data.const_val |= negative_mask; | |
15566 | if (high.kind == PROP_CONST | |
15567 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
15568 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 15569 | |
729efb13 | 15570 | range_type = create_range_type (NULL, orig_base_type, &low, &high); |
a02abb62 | 15571 | |
c451ebe5 SA |
15572 | if (high_bound_is_count) |
15573 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
15574 | ||
c2ff108b JK |
15575 | /* Ada expects an empty array on no boundary attributes. */ |
15576 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 15577 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 15578 | |
39cbfefa DJ |
15579 | name = dwarf2_name (die, cu); |
15580 | if (name) | |
15581 | TYPE_NAME (range_type) = name; | |
6e70227d | 15582 | |
e142c38c | 15583 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
15584 | if (attr) |
15585 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
15586 | ||
7e314c57 JK |
15587 | set_die_type (die, range_type, cu); |
15588 | ||
15589 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15590 | set_descriptive_type (range_type, die, cu); |
15591 | ||
7e314c57 | 15592 | return range_type; |
a02abb62 | 15593 | } |
6e70227d | 15594 | |
f792889a | 15595 | static struct type * |
81a17f79 JB |
15596 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
15597 | { | |
15598 | struct type *type; | |
81a17f79 | 15599 | |
81a17f79 JB |
15600 | /* For now, we only support the C meaning of an unspecified type: void. */ |
15601 | ||
19f392bc | 15602 | type = init_type (cu->objfile, TYPE_CODE_VOID, 0, NULL); |
0114d602 | 15603 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 15604 | |
f792889a | 15605 | return set_die_type (die, type, cu); |
81a17f79 | 15606 | } |
a02abb62 | 15607 | |
639d11d3 DC |
15608 | /* Read a single die and all its descendents. Set the die's sibling |
15609 | field to NULL; set other fields in the die correctly, and set all | |
15610 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
15611 | location of the info_ptr after reading all of those dies. PARENT | |
15612 | is the parent of the die in question. */ | |
15613 | ||
15614 | static struct die_info * | |
dee91e82 | 15615 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
15616 | const gdb_byte *info_ptr, |
15617 | const gdb_byte **new_info_ptr, | |
dee91e82 | 15618 | struct die_info *parent) |
639d11d3 DC |
15619 | { |
15620 | struct die_info *die; | |
d521ce57 | 15621 | const gdb_byte *cur_ptr; |
639d11d3 DC |
15622 | int has_children; |
15623 | ||
bf6af496 | 15624 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
15625 | if (die == NULL) |
15626 | { | |
15627 | *new_info_ptr = cur_ptr; | |
15628 | return NULL; | |
15629 | } | |
93311388 | 15630 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
15631 | |
15632 | if (has_children) | |
bf6af496 | 15633 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
15634 | else |
15635 | { | |
15636 | die->child = NULL; | |
15637 | *new_info_ptr = cur_ptr; | |
15638 | } | |
15639 | ||
15640 | die->sibling = NULL; | |
15641 | die->parent = parent; | |
15642 | return die; | |
15643 | } | |
15644 | ||
15645 | /* Read a die, all of its descendents, and all of its siblings; set | |
15646 | all of the fields of all of the dies correctly. Arguments are as | |
15647 | in read_die_and_children. */ | |
15648 | ||
15649 | static struct die_info * | |
bf6af496 | 15650 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
15651 | const gdb_byte *info_ptr, |
15652 | const gdb_byte **new_info_ptr, | |
bf6af496 | 15653 | struct die_info *parent) |
639d11d3 DC |
15654 | { |
15655 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 15656 | const gdb_byte *cur_ptr; |
639d11d3 | 15657 | |
c906108c | 15658 | cur_ptr = info_ptr; |
639d11d3 DC |
15659 | first_die = last_sibling = NULL; |
15660 | ||
15661 | while (1) | |
c906108c | 15662 | { |
639d11d3 | 15663 | struct die_info *die |
dee91e82 | 15664 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 15665 | |
1d325ec1 | 15666 | if (die == NULL) |
c906108c | 15667 | { |
639d11d3 DC |
15668 | *new_info_ptr = cur_ptr; |
15669 | return first_die; | |
c906108c | 15670 | } |
1d325ec1 DJ |
15671 | |
15672 | if (!first_die) | |
15673 | first_die = die; | |
c906108c | 15674 | else |
1d325ec1 DJ |
15675 | last_sibling->sibling = die; |
15676 | ||
15677 | last_sibling = die; | |
c906108c | 15678 | } |
c906108c SS |
15679 | } |
15680 | ||
bf6af496 DE |
15681 | /* Read a die, all of its descendents, and all of its siblings; set |
15682 | all of the fields of all of the dies correctly. Arguments are as | |
15683 | in read_die_and_children. | |
15684 | This the main entry point for reading a DIE and all its children. */ | |
15685 | ||
15686 | static struct die_info * | |
15687 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
15688 | const gdb_byte *info_ptr, |
15689 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
15690 | struct die_info *parent) |
15691 | { | |
15692 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
15693 | new_info_ptr, parent); | |
15694 | ||
b4f54984 | 15695 | if (dwarf_die_debug) |
bf6af496 DE |
15696 | { |
15697 | fprintf_unfiltered (gdb_stdlog, | |
15698 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15699 | get_section_name (reader->die_section), |
bf6af496 DE |
15700 | (unsigned) (info_ptr - reader->die_section->buffer), |
15701 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15702 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
15703 | } |
15704 | ||
15705 | return die; | |
15706 | } | |
15707 | ||
3019eac3 DE |
15708 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
15709 | attributes. | |
15710 | The caller is responsible for filling in the extra attributes | |
15711 | and updating (*DIEP)->num_attrs. | |
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. */ | |
93311388 | 15715 | |
d521ce57 | 15716 | static const gdb_byte * |
3019eac3 | 15717 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 15718 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 15719 | int *has_children, int num_extra_attrs) |
93311388 | 15720 | { |
b64f50a1 | 15721 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
15722 | struct abbrev_info *abbrev; |
15723 | struct die_info *die; | |
15724 | struct dwarf2_cu *cu = reader->cu; | |
15725 | bfd *abfd = reader->abfd; | |
15726 | ||
9c541725 | 15727 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
15728 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
15729 | info_ptr += bytes_read; | |
15730 | if (!abbrev_number) | |
15731 | { | |
15732 | *diep = NULL; | |
15733 | *has_children = 0; | |
15734 | return info_ptr; | |
15735 | } | |
15736 | ||
433df2d4 | 15737 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 15738 | if (!abbrev) |
348e048f DE |
15739 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
15740 | abbrev_number, | |
15741 | bfd_get_filename (abfd)); | |
15742 | ||
3019eac3 | 15743 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 15744 | die->sect_off = sect_off; |
93311388 DE |
15745 | die->tag = abbrev->tag; |
15746 | die->abbrev = abbrev_number; | |
15747 | ||
3019eac3 DE |
15748 | /* Make the result usable. |
15749 | The caller needs to update num_attrs after adding the extra | |
15750 | attributes. */ | |
93311388 DE |
15751 | die->num_attrs = abbrev->num_attrs; |
15752 | ||
15753 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
15754 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
15755 | info_ptr); | |
93311388 DE |
15756 | |
15757 | *diep = die; | |
15758 | *has_children = abbrev->has_children; | |
15759 | return info_ptr; | |
15760 | } | |
15761 | ||
3019eac3 DE |
15762 | /* Read a die and all its attributes. |
15763 | Set DIEP to point to a newly allocated die with its information, | |
15764 | except for its child, sibling, and parent fields. | |
15765 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
15766 | ||
d521ce57 | 15767 | static const gdb_byte * |
3019eac3 | 15768 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 15769 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
15770 | int *has_children) |
15771 | { | |
d521ce57 | 15772 | const gdb_byte *result; |
bf6af496 DE |
15773 | |
15774 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
15775 | ||
b4f54984 | 15776 | if (dwarf_die_debug) |
bf6af496 DE |
15777 | { |
15778 | fprintf_unfiltered (gdb_stdlog, | |
15779 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 15780 | get_section_name (reader->die_section), |
bf6af496 DE |
15781 | (unsigned) (info_ptr - reader->die_section->buffer), |
15782 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 15783 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
15784 | } |
15785 | ||
15786 | return result; | |
3019eac3 | 15787 | } |
433df2d4 DE |
15788 | \f |
15789 | /* Abbreviation tables. | |
3019eac3 | 15790 | |
433df2d4 | 15791 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
15792 | stored in a separate .debug_abbrev section. Before we read any |
15793 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
15794 | in a hash table. */ |
15795 | ||
15796 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
15797 | ||
15798 | static struct abbrev_info * | |
15799 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
15800 | { | |
15801 | struct abbrev_info *abbrev; | |
15802 | ||
8d749320 | 15803 | abbrev = XOBNEW (&abbrev_table->abbrev_obstack, struct abbrev_info); |
433df2d4 | 15804 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 15805 | |
433df2d4 DE |
15806 | return abbrev; |
15807 | } | |
15808 | ||
15809 | /* Add an abbreviation to the table. */ | |
c906108c SS |
15810 | |
15811 | static void | |
433df2d4 DE |
15812 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
15813 | unsigned int abbrev_number, | |
15814 | struct abbrev_info *abbrev) | |
15815 | { | |
15816 | unsigned int hash_number; | |
15817 | ||
15818 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15819 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
15820 | abbrev_table->abbrevs[hash_number] = abbrev; | |
15821 | } | |
dee91e82 | 15822 | |
433df2d4 DE |
15823 | /* Look up an abbrev in the table. |
15824 | Returns NULL if the abbrev is not found. */ | |
15825 | ||
15826 | static struct abbrev_info * | |
15827 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
15828 | unsigned int abbrev_number) | |
c906108c | 15829 | { |
433df2d4 DE |
15830 | unsigned int hash_number; |
15831 | struct abbrev_info *abbrev; | |
15832 | ||
15833 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
15834 | abbrev = abbrev_table->abbrevs[hash_number]; | |
15835 | ||
15836 | while (abbrev) | |
15837 | { | |
15838 | if (abbrev->number == abbrev_number) | |
15839 | return abbrev; | |
15840 | abbrev = abbrev->next; | |
15841 | } | |
15842 | return NULL; | |
15843 | } | |
15844 | ||
15845 | /* Read in an abbrev table. */ | |
15846 | ||
15847 | static struct abbrev_table * | |
15848 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
9c541725 | 15849 | sect_offset sect_off) |
433df2d4 DE |
15850 | { |
15851 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 15852 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 15853 | struct abbrev_table *abbrev_table; |
d521ce57 | 15854 | const gdb_byte *abbrev_ptr; |
c906108c SS |
15855 | struct abbrev_info *cur_abbrev; |
15856 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 15857 | unsigned int abbrev_form; |
f3dd6933 DJ |
15858 | struct attr_abbrev *cur_attrs; |
15859 | unsigned int allocated_attrs; | |
c906108c | 15860 | |
70ba0933 | 15861 | abbrev_table = XNEW (struct abbrev_table); |
9c541725 | 15862 | abbrev_table->sect_off = sect_off; |
433df2d4 | 15863 | obstack_init (&abbrev_table->abbrev_obstack); |
8d749320 SM |
15864 | abbrev_table->abbrevs = |
15865 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct abbrev_info *, | |
15866 | ABBREV_HASH_SIZE); | |
433df2d4 DE |
15867 | memset (abbrev_table->abbrevs, 0, |
15868 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 15869 | |
433df2d4 | 15870 | dwarf2_read_section (objfile, section); |
9c541725 | 15871 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
15872 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15873 | abbrev_ptr += bytes_read; | |
15874 | ||
f3dd6933 | 15875 | allocated_attrs = ATTR_ALLOC_CHUNK; |
8d749320 | 15876 | cur_attrs = XNEWVEC (struct attr_abbrev, allocated_attrs); |
6e70227d | 15877 | |
0963b4bd | 15878 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
15879 | while (abbrev_number) |
15880 | { | |
433df2d4 | 15881 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
15882 | |
15883 | /* read in abbrev header */ | |
15884 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
15885 | cur_abbrev->tag |
15886 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
15887 | abbrev_ptr += bytes_read; |
15888 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
15889 | abbrev_ptr += 1; | |
15890 | ||
15891 | /* now read in declarations */ | |
22d2f3ab | 15892 | for (;;) |
c906108c | 15893 | { |
43988095 JK |
15894 | LONGEST implicit_const; |
15895 | ||
22d2f3ab JK |
15896 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
15897 | abbrev_ptr += bytes_read; | |
15898 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15899 | abbrev_ptr += bytes_read; | |
43988095 JK |
15900 | if (abbrev_form == DW_FORM_implicit_const) |
15901 | { | |
15902 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
15903 | &bytes_read); | |
15904 | abbrev_ptr += bytes_read; | |
15905 | } | |
15906 | else | |
15907 | { | |
15908 | /* Initialize it due to a false compiler warning. */ | |
15909 | implicit_const = -1; | |
15910 | } | |
22d2f3ab JK |
15911 | |
15912 | if (abbrev_name == 0) | |
15913 | break; | |
15914 | ||
f3dd6933 | 15915 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 15916 | { |
f3dd6933 DJ |
15917 | allocated_attrs += ATTR_ALLOC_CHUNK; |
15918 | cur_attrs | |
224c3ddb | 15919 | = XRESIZEVEC (struct attr_abbrev, cur_attrs, allocated_attrs); |
c906108c | 15920 | } |
ae038cb0 | 15921 | |
aead7601 SM |
15922 | cur_attrs[cur_abbrev->num_attrs].name |
15923 | = (enum dwarf_attribute) abbrev_name; | |
22d2f3ab | 15924 | cur_attrs[cur_abbrev->num_attrs].form |
aead7601 | 15925 | = (enum dwarf_form) abbrev_form; |
43988095 | 15926 | cur_attrs[cur_abbrev->num_attrs].implicit_const = implicit_const; |
22d2f3ab | 15927 | ++cur_abbrev->num_attrs; |
c906108c SS |
15928 | } |
15929 | ||
8d749320 SM |
15930 | cur_abbrev->attrs = |
15931 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
15932 | cur_abbrev->num_attrs); | |
f3dd6933 DJ |
15933 | memcpy (cur_abbrev->attrs, cur_attrs, |
15934 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
15935 | ||
433df2d4 | 15936 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
15937 | |
15938 | /* Get next abbreviation. | |
15939 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
15940 | always properly terminated with an abbrev number of 0. |
15941 | Exit loop if we encounter an abbreviation which we have | |
15942 | already read (which means we are about to read the abbreviations | |
15943 | for the next compile unit) or if the end of the abbreviation | |
15944 | table is reached. */ | |
433df2d4 | 15945 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
15946 | break; |
15947 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
15948 | abbrev_ptr += bytes_read; | |
433df2d4 | 15949 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
15950 | break; |
15951 | } | |
f3dd6933 DJ |
15952 | |
15953 | xfree (cur_attrs); | |
433df2d4 | 15954 | return abbrev_table; |
c906108c SS |
15955 | } |
15956 | ||
433df2d4 | 15957 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 15958 | |
c906108c | 15959 | static void |
433df2d4 | 15960 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 15961 | { |
433df2d4 DE |
15962 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
15963 | xfree (abbrev_table); | |
c906108c SS |
15964 | } |
15965 | ||
f4dc4d17 DE |
15966 | /* Same as abbrev_table_free but as a cleanup. |
15967 | We pass in a pointer to the pointer to the table so that we can | |
15968 | set the pointer to NULL when we're done. It also simplifies | |
73051182 | 15969 | build_type_psymtabs_1. */ |
f4dc4d17 DE |
15970 | |
15971 | static void | |
15972 | abbrev_table_free_cleanup (void *table_ptr) | |
15973 | { | |
9a3c8263 | 15974 | struct abbrev_table **abbrev_table_ptr = (struct abbrev_table **) table_ptr; |
f4dc4d17 DE |
15975 | |
15976 | if (*abbrev_table_ptr != NULL) | |
15977 | abbrev_table_free (*abbrev_table_ptr); | |
15978 | *abbrev_table_ptr = NULL; | |
15979 | } | |
15980 | ||
433df2d4 DE |
15981 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
15982 | ||
15983 | static void | |
15984 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
15985 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 15986 | { |
433df2d4 | 15987 | cu->abbrev_table = |
9c541725 | 15988 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_sect_off); |
433df2d4 | 15989 | } |
c906108c | 15990 | |
433df2d4 | 15991 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 15992 | |
433df2d4 DE |
15993 | static void |
15994 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
15995 | { | |
9a3c8263 | 15996 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr_to_cu; |
c906108c | 15997 | |
a2ce51a0 DE |
15998 | if (cu->abbrev_table != NULL) |
15999 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
16000 | /* Set this to NULL so that we SEGV if we try to read it later, |
16001 | and also because free_comp_unit verifies this is NULL. */ | |
16002 | cu->abbrev_table = NULL; | |
16003 | } | |
16004 | \f | |
72bf9492 DJ |
16005 | /* Returns nonzero if TAG represents a type that we might generate a partial |
16006 | symbol for. */ | |
16007 | ||
16008 | static int | |
16009 | is_type_tag_for_partial (int tag) | |
16010 | { | |
16011 | switch (tag) | |
16012 | { | |
16013 | #if 0 | |
16014 | /* Some types that would be reasonable to generate partial symbols for, | |
16015 | that we don't at present. */ | |
16016 | case DW_TAG_array_type: | |
16017 | case DW_TAG_file_type: | |
16018 | case DW_TAG_ptr_to_member_type: | |
16019 | case DW_TAG_set_type: | |
16020 | case DW_TAG_string_type: | |
16021 | case DW_TAG_subroutine_type: | |
16022 | #endif | |
16023 | case DW_TAG_base_type: | |
16024 | case DW_TAG_class_type: | |
680b30c7 | 16025 | case DW_TAG_interface_type: |
72bf9492 DJ |
16026 | case DW_TAG_enumeration_type: |
16027 | case DW_TAG_structure_type: | |
16028 | case DW_TAG_subrange_type: | |
16029 | case DW_TAG_typedef: | |
16030 | case DW_TAG_union_type: | |
16031 | return 1; | |
16032 | default: | |
16033 | return 0; | |
16034 | } | |
16035 | } | |
16036 | ||
16037 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
16038 | ||
16039 | static struct partial_die_info * | |
dee91e82 | 16040 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 16041 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 16042 | { |
dee91e82 | 16043 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16044 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
16045 | struct partial_die_info *part_die; |
16046 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
16047 | struct abbrev_info *abbrev; | |
16048 | unsigned int bytes_read; | |
5afb4e99 | 16049 | unsigned int load_all = 0; |
72bf9492 DJ |
16050 | int nesting_level = 1; |
16051 | ||
16052 | parent_die = NULL; | |
16053 | last_die = NULL; | |
16054 | ||
7adf1e79 DE |
16055 | gdb_assert (cu->per_cu != NULL); |
16056 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
16057 | load_all = 1; |
16058 | ||
72bf9492 DJ |
16059 | cu->partial_dies |
16060 | = htab_create_alloc_ex (cu->header.length / 12, | |
16061 | partial_die_hash, | |
16062 | partial_die_eq, | |
16063 | NULL, | |
16064 | &cu->comp_unit_obstack, | |
16065 | hashtab_obstack_allocate, | |
16066 | dummy_obstack_deallocate); | |
16067 | ||
8d749320 | 16068 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16069 | |
16070 | while (1) | |
16071 | { | |
16072 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
16073 | ||
16074 | /* A NULL abbrev means the end of a series of children. */ | |
16075 | if (abbrev == NULL) | |
16076 | { | |
16077 | if (--nesting_level == 0) | |
16078 | { | |
16079 | /* PART_DIE was probably the last thing allocated on the | |
16080 | comp_unit_obstack, so we could call obstack_free | |
16081 | here. We don't do that because the waste is small, | |
16082 | and will be cleaned up when we're done with this | |
16083 | compilation unit. This way, we're also more robust | |
16084 | against other users of the comp_unit_obstack. */ | |
16085 | return first_die; | |
16086 | } | |
16087 | info_ptr += bytes_read; | |
16088 | last_die = parent_die; | |
16089 | parent_die = parent_die->die_parent; | |
16090 | continue; | |
16091 | } | |
16092 | ||
98bfdba5 PA |
16093 | /* Check for template arguments. We never save these; if |
16094 | they're seen, we just mark the parent, and go on our way. */ | |
16095 | if (parent_die != NULL | |
16096 | && cu->language == language_cplus | |
16097 | && (abbrev->tag == DW_TAG_template_type_param | |
16098 | || abbrev->tag == DW_TAG_template_value_param)) | |
16099 | { | |
16100 | parent_die->has_template_arguments = 1; | |
16101 | ||
16102 | if (!load_all) | |
16103 | { | |
16104 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 16105 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16106 | continue; |
16107 | } | |
16108 | } | |
16109 | ||
0d99eb77 | 16110 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
16111 | Skip their other children. */ |
16112 | if (!load_all | |
16113 | && cu->language == language_cplus | |
16114 | && parent_die != NULL | |
16115 | && parent_die->tag == DW_TAG_subprogram) | |
16116 | { | |
dee91e82 | 16117 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
16118 | continue; |
16119 | } | |
16120 | ||
5afb4e99 DJ |
16121 | /* Check whether this DIE is interesting enough to save. Normally |
16122 | we would not be interested in members here, but there may be | |
16123 | later variables referencing them via DW_AT_specification (for | |
16124 | static members). */ | |
16125 | if (!load_all | |
16126 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 16127 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
16128 | && abbrev->tag != DW_TAG_enumerator |
16129 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 16130 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 16131 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 16132 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 16133 | && abbrev->tag != DW_TAG_module |
95554aad | 16134 | && abbrev->tag != DW_TAG_member |
74921315 KS |
16135 | && abbrev->tag != DW_TAG_imported_unit |
16136 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
16137 | { |
16138 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16139 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
16140 | continue; |
16141 | } | |
16142 | ||
dee91e82 DE |
16143 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
16144 | info_ptr); | |
72bf9492 DJ |
16145 | |
16146 | /* This two-pass algorithm for processing partial symbols has a | |
16147 | high cost in cache pressure. Thus, handle some simple cases | |
16148 | here which cover the majority of C partial symbols. DIEs | |
16149 | which neither have specification tags in them, nor could have | |
16150 | specification tags elsewhere pointing at them, can simply be | |
16151 | processed and discarded. | |
16152 | ||
16153 | This segment is also optional; scan_partial_symbols and | |
16154 | add_partial_symbol will handle these DIEs if we chain | |
16155 | them in normally. When compilers which do not emit large | |
16156 | quantities of duplicate debug information are more common, | |
16157 | this code can probably be removed. */ | |
16158 | ||
16159 | /* Any complete simple types at the top level (pretty much all | |
16160 | of them, for a language without namespaces), can be processed | |
16161 | directly. */ | |
16162 | if (parent_die == NULL | |
16163 | && part_die->has_specification == 0 | |
16164 | && part_die->is_declaration == 0 | |
d8228535 | 16165 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
16166 | || part_die->tag == DW_TAG_base_type |
16167 | || part_die->tag == DW_TAG_subrange_type)) | |
16168 | { | |
16169 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 16170 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16171 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 | 16172 | &objfile->static_psymbols, |
1762568f | 16173 | 0, cu->language, objfile); |
dee91e82 | 16174 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16175 | continue; |
16176 | } | |
16177 | ||
d8228535 JK |
16178 | /* The exception for DW_TAG_typedef with has_children above is |
16179 | a workaround of GCC PR debug/47510. In the case of this complaint | |
16180 | type_name_no_tag_or_error will error on such types later. | |
16181 | ||
16182 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
16183 | it could not find the child DIEs referenced later, this is checked | |
16184 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
16185 | ||
16186 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
16187 | complaint (&symfile_complaints, | |
16188 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
16189 | "- DIE at 0x%x [in module %s]"), | |
9c541725 | 16190 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
d8228535 | 16191 | |
72bf9492 DJ |
16192 | /* If we're at the second level, and we're an enumerator, and |
16193 | our parent has no specification (meaning possibly lives in a | |
16194 | namespace elsewhere), then we can add the partial symbol now | |
16195 | instead of queueing it. */ | |
16196 | if (part_die->tag == DW_TAG_enumerator | |
16197 | && parent_die != NULL | |
16198 | && parent_die->die_parent == NULL | |
16199 | && parent_die->tag == DW_TAG_enumeration_type | |
16200 | && parent_die->has_specification == 0) | |
16201 | { | |
16202 | if (part_die->name == NULL) | |
3e43a32a MS |
16203 | complaint (&symfile_complaints, |
16204 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 16205 | else if (building_psymtab) |
04a679b8 | 16206 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 16207 | VAR_DOMAIN, LOC_CONST, |
9c37b5ae | 16208 | cu->language == language_cplus |
bb5ed363 DE |
16209 | ? &objfile->global_psymbols |
16210 | : &objfile->static_psymbols, | |
1762568f | 16211 | 0, cu->language, objfile); |
72bf9492 | 16212 | |
dee91e82 | 16213 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
16214 | continue; |
16215 | } | |
16216 | ||
16217 | /* We'll save this DIE so link it in. */ | |
16218 | part_die->die_parent = parent_die; | |
16219 | part_die->die_sibling = NULL; | |
16220 | part_die->die_child = NULL; | |
16221 | ||
16222 | if (last_die && last_die == parent_die) | |
16223 | last_die->die_child = part_die; | |
16224 | else if (last_die) | |
16225 | last_die->die_sibling = part_die; | |
16226 | ||
16227 | last_die = part_die; | |
16228 | ||
16229 | if (first_die == NULL) | |
16230 | first_die = part_die; | |
16231 | ||
16232 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
16233 | find interesting need to be in the hash table, because we | |
16234 | also have the parent/sibling/child chains; only those that we | |
16235 | might refer to by offset later during partial symbol reading. | |
16236 | ||
16237 | For now this means things that might have be the target of a | |
16238 | DW_AT_specification, DW_AT_abstract_origin, or | |
16239 | DW_AT_extension. DW_AT_extension will refer only to | |
16240 | namespaces; DW_AT_abstract_origin refers to functions (and | |
16241 | many things under the function DIE, but we do not recurse | |
16242 | into function DIEs during partial symbol reading) and | |
16243 | possibly variables as well; DW_AT_specification refers to | |
16244 | declarations. Declarations ought to have the DW_AT_declaration | |
16245 | flag. It happens that GCC forgets to put it in sometimes, but | |
16246 | only for functions, not for types. | |
16247 | ||
16248 | Adding more things than necessary to the hash table is harmless | |
16249 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
16250 | wasted time in find_partial_die, when we reread the compilation |
16251 | unit with load_all_dies set. */ | |
72bf9492 | 16252 | |
5afb4e99 | 16253 | if (load_all |
72929c62 | 16254 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 16255 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
16256 | || abbrev->tag == DW_TAG_variable |
16257 | || abbrev->tag == DW_TAG_namespace | |
16258 | || part_die->is_declaration) | |
16259 | { | |
16260 | void **slot; | |
16261 | ||
16262 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
16263 | to_underlying (part_die->sect_off), |
16264 | INSERT); | |
72bf9492 DJ |
16265 | *slot = part_die; |
16266 | } | |
16267 | ||
8d749320 | 16268 | part_die = XOBNEW (&cu->comp_unit_obstack, struct partial_die_info); |
72bf9492 DJ |
16269 | |
16270 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 16271 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
16272 | languages we have to, so that we can get at method physnames |
16273 | to infer fully qualified class names, for DW_AT_specification, | |
16274 | and for C++ template arguments. For C++, we also look one level | |
16275 | inside functions to find template arguments (if the name of the | |
16276 | function does not already contain the template arguments). | |
bc30ff58 JB |
16277 | |
16278 | For Ada, we need to scan the children of subprograms and lexical | |
16279 | blocks as well because Ada allows the definition of nested | |
16280 | entities that could be interesting for the debugger, such as | |
16281 | nested subprograms for instance. */ | |
72bf9492 | 16282 | if (last_die->has_children |
5afb4e99 DJ |
16283 | && (load_all |
16284 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 16285 | || last_die->tag == DW_TAG_module |
72bf9492 | 16286 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
16287 | || (cu->language == language_cplus |
16288 | && last_die->tag == DW_TAG_subprogram | |
16289 | && (last_die->name == NULL | |
16290 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
16291 | || (cu->language != language_c |
16292 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 16293 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 16294 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
16295 | || last_die->tag == DW_TAG_union_type)) |
16296 | || (cu->language == language_ada | |
16297 | && (last_die->tag == DW_TAG_subprogram | |
16298 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
16299 | { |
16300 | nesting_level++; | |
16301 | parent_die = last_die; | |
16302 | continue; | |
16303 | } | |
16304 | ||
16305 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 16306 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
16307 | |
16308 | /* Back to the top, do it again. */ | |
16309 | } | |
16310 | } | |
16311 | ||
c906108c SS |
16312 | /* Read a minimal amount of information into the minimal die structure. */ |
16313 | ||
d521ce57 | 16314 | static const gdb_byte * |
dee91e82 DE |
16315 | read_partial_die (const struct die_reader_specs *reader, |
16316 | struct partial_die_info *part_die, | |
16317 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 16318 | const gdb_byte *info_ptr) |
c906108c | 16319 | { |
dee91e82 | 16320 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 16321 | struct objfile *objfile = cu->objfile; |
d521ce57 | 16322 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 16323 | unsigned int i; |
c906108c | 16324 | struct attribute attr; |
c5aa993b | 16325 | int has_low_pc_attr = 0; |
c906108c | 16326 | int has_high_pc_attr = 0; |
91da1414 | 16327 | int high_pc_relative = 0; |
c906108c | 16328 | |
72bf9492 | 16329 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 16330 | |
9c541725 | 16331 | part_die->sect_off = (sect_offset) (info_ptr - buffer); |
72bf9492 DJ |
16332 | |
16333 | info_ptr += abbrev_len; | |
16334 | ||
16335 | if (abbrev == NULL) | |
16336 | return info_ptr; | |
16337 | ||
c906108c SS |
16338 | part_die->tag = abbrev->tag; |
16339 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
16340 | |
16341 | for (i = 0; i < abbrev->num_attrs; ++i) | |
16342 | { | |
dee91e82 | 16343 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
16344 | |
16345 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 16346 | partial symbol table. */ |
c906108c SS |
16347 | switch (attr.name) |
16348 | { | |
16349 | case DW_AT_name: | |
71c25dea TT |
16350 | switch (part_die->tag) |
16351 | { | |
16352 | case DW_TAG_compile_unit: | |
95554aad | 16353 | case DW_TAG_partial_unit: |
348e048f | 16354 | case DW_TAG_type_unit: |
71c25dea TT |
16355 | /* Compilation units have a DW_AT_name that is a filename, not |
16356 | a source language identifier. */ | |
16357 | case DW_TAG_enumeration_type: | |
16358 | case DW_TAG_enumerator: | |
16359 | /* These tags always have simple identifiers already; no need | |
16360 | to canonicalize them. */ | |
16361 | part_die->name = DW_STRING (&attr); | |
16362 | break; | |
16363 | default: | |
16364 | part_die->name | |
16365 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
34a68019 | 16366 | &objfile->per_bfd->storage_obstack); |
71c25dea TT |
16367 | break; |
16368 | } | |
c906108c | 16369 | break; |
31ef98ae | 16370 | case DW_AT_linkage_name: |
c906108c | 16371 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
16372 | /* Note that both forms of linkage name might appear. We |
16373 | assume they will be the same, and we only store the last | |
16374 | one we see. */ | |
94af9270 KS |
16375 | if (cu->language == language_ada) |
16376 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 16377 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
16378 | break; |
16379 | case DW_AT_low_pc: | |
16380 | has_low_pc_attr = 1; | |
31aa7e4e | 16381 | part_die->lowpc = attr_value_as_address (&attr); |
c906108c SS |
16382 | break; |
16383 | case DW_AT_high_pc: | |
16384 | has_high_pc_attr = 1; | |
31aa7e4e JB |
16385 | part_die->highpc = attr_value_as_address (&attr); |
16386 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) | |
16387 | high_pc_relative = 1; | |
c906108c SS |
16388 | break; |
16389 | case DW_AT_location: | |
0963b4bd | 16390 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
16391 | if (attr_form_is_block (&attr)) |
16392 | { | |
95554aad | 16393 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 16394 | } |
3690dd37 | 16395 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 16396 | { |
4d3c2250 | 16397 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
16398 | } |
16399 | else | |
16400 | { | |
4d3c2250 KB |
16401 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
16402 | "partial symbol information"); | |
8e19ed76 | 16403 | } |
c906108c | 16404 | break; |
c906108c SS |
16405 | case DW_AT_external: |
16406 | part_die->is_external = DW_UNSND (&attr); | |
16407 | break; | |
16408 | case DW_AT_declaration: | |
16409 | part_die->is_declaration = DW_UNSND (&attr); | |
16410 | break; | |
16411 | case DW_AT_type: | |
16412 | part_die->has_type = 1; | |
16413 | break; | |
16414 | case DW_AT_abstract_origin: | |
16415 | case DW_AT_specification: | |
72bf9492 DJ |
16416 | case DW_AT_extension: |
16417 | part_die->has_specification = 1; | |
c764a876 | 16418 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16419 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16420 | || cu->per_cu->is_dwz); | |
c906108c SS |
16421 | break; |
16422 | case DW_AT_sibling: | |
16423 | /* Ignore absolute siblings, they might point outside of | |
16424 | the current compile unit. */ | |
16425 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
16426 | complaint (&symfile_complaints, |
16427 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 16428 | else |
b9502d3f | 16429 | { |
9c541725 PA |
16430 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
16431 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
16432 | |
16433 | if (sibling_ptr < info_ptr) | |
16434 | complaint (&symfile_complaints, | |
16435 | _("DW_AT_sibling points backwards")); | |
22869d73 KS |
16436 | else if (sibling_ptr > reader->buffer_end) |
16437 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
16438 | else |
16439 | part_die->sibling = sibling_ptr; | |
16440 | } | |
c906108c | 16441 | break; |
fa4028e9 JB |
16442 | case DW_AT_byte_size: |
16443 | part_die->has_byte_size = 1; | |
16444 | break; | |
ff908ebf AW |
16445 | case DW_AT_const_value: |
16446 | part_die->has_const_value = 1; | |
16447 | break; | |
68511cec CES |
16448 | case DW_AT_calling_convention: |
16449 | /* DWARF doesn't provide a way to identify a program's source-level | |
16450 | entry point. DW_AT_calling_convention attributes are only meant | |
16451 | to describe functions' calling conventions. | |
16452 | ||
16453 | However, because it's a necessary piece of information in | |
0c1b455e TT |
16454 | Fortran, and before DWARF 4 DW_CC_program was the only |
16455 | piece of debugging information whose definition refers to | |
16456 | a 'main program' at all, several compilers marked Fortran | |
16457 | main programs with DW_CC_program --- even when those | |
16458 | functions use the standard calling conventions. | |
16459 | ||
16460 | Although DWARF now specifies a way to provide this | |
16461 | information, we support this practice for backward | |
16462 | compatibility. */ | |
68511cec | 16463 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e TT |
16464 | && cu->language == language_fortran) |
16465 | part_die->main_subprogram = 1; | |
68511cec | 16466 | break; |
481860b3 GB |
16467 | case DW_AT_inline: |
16468 | if (DW_UNSND (&attr) == DW_INL_inlined | |
16469 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
16470 | part_die->may_be_inlined = 1; | |
16471 | break; | |
95554aad TT |
16472 | |
16473 | case DW_AT_import: | |
16474 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 | 16475 | { |
9c541725 | 16476 | part_die->d.sect_off = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
16477 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
16478 | || cu->per_cu->is_dwz); | |
16479 | } | |
95554aad TT |
16480 | break; |
16481 | ||
0c1b455e TT |
16482 | case DW_AT_main_subprogram: |
16483 | part_die->main_subprogram = DW_UNSND (&attr); | |
16484 | break; | |
16485 | ||
c906108c SS |
16486 | default: |
16487 | break; | |
16488 | } | |
16489 | } | |
16490 | ||
91da1414 MW |
16491 | if (high_pc_relative) |
16492 | part_die->highpc += part_die->lowpc; | |
16493 | ||
9373cf26 JK |
16494 | if (has_low_pc_attr && has_high_pc_attr) |
16495 | { | |
16496 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
16497 | eliminate duplicate copies of functions and vtables and such. | |
16498 | The linker will arbitrarily choose one and discard the others. | |
16499 | The AT_*_pc values for such functions refer to local labels in | |
16500 | these sections. If the section from that file was discarded, the | |
16501 | labels are not in the output, so the relocs get a value of 0. | |
16502 | If this is a discarded function, mark the pc bounds as invalid, | |
16503 | so that GDB will ignore it. */ | |
16504 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
16505 | { | |
bb5ed363 | 16506 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16507 | |
16508 | complaint (&symfile_complaints, | |
16509 | _("DW_AT_low_pc %s is zero " | |
16510 | "for DIE at 0x%x [in module %s]"), | |
16511 | paddress (gdbarch, part_die->lowpc), | |
9c541725 | 16512 | to_underlying (part_die->sect_off), objfile_name (objfile)); |
9373cf26 JK |
16513 | } |
16514 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
16515 | else if (part_die->lowpc >= part_die->highpc) | |
16516 | { | |
bb5ed363 | 16517 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
16518 | |
16519 | complaint (&symfile_complaints, | |
16520 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
16521 | "for DIE at 0x%x [in module %s]"), | |
16522 | paddress (gdbarch, part_die->lowpc), | |
16523 | paddress (gdbarch, part_die->highpc), | |
9c541725 PA |
16524 | to_underlying (part_die->sect_off), |
16525 | objfile_name (objfile)); | |
9373cf26 JK |
16526 | } |
16527 | else | |
16528 | part_die->has_pc_info = 1; | |
16529 | } | |
85cbf3d3 | 16530 | |
c906108c SS |
16531 | return info_ptr; |
16532 | } | |
16533 | ||
72bf9492 DJ |
16534 | /* Find a cached partial DIE at OFFSET in CU. */ |
16535 | ||
16536 | static struct partial_die_info * | |
9c541725 | 16537 | find_partial_die_in_comp_unit (sect_offset sect_off, struct dwarf2_cu *cu) |
72bf9492 DJ |
16538 | { |
16539 | struct partial_die_info *lookup_die = NULL; | |
16540 | struct partial_die_info part_die; | |
16541 | ||
9c541725 | 16542 | part_die.sect_off = sect_off; |
9a3c8263 SM |
16543 | lookup_die = ((struct partial_die_info *) |
16544 | htab_find_with_hash (cu->partial_dies, &part_die, | |
9c541725 | 16545 | to_underlying (sect_off))); |
72bf9492 | 16546 | |
72bf9492 DJ |
16547 | return lookup_die; |
16548 | } | |
16549 | ||
348e048f DE |
16550 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
16551 | except in the case of .debug_types DIEs which do not reference | |
16552 | outside their CU (they do however referencing other types via | |
55f1336d | 16553 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
16554 | |
16555 | static struct partial_die_info * | |
9c541725 | 16556 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 16557 | { |
bb5ed363 | 16558 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
16559 | struct dwarf2_per_cu_data *per_cu = NULL; |
16560 | struct partial_die_info *pd = NULL; | |
72bf9492 | 16561 | |
36586728 | 16562 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 16563 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 16564 | { |
9c541725 | 16565 | pd = find_partial_die_in_comp_unit (sect_off, cu); |
5afb4e99 DJ |
16566 | if (pd != NULL) |
16567 | return pd; | |
0d99eb77 DE |
16568 | /* We missed recording what we needed. |
16569 | Load all dies and try again. */ | |
16570 | per_cu = cu->per_cu; | |
5afb4e99 | 16571 | } |
0d99eb77 DE |
16572 | else |
16573 | { | |
16574 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 16575 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 16576 | { |
9c541725 PA |
16577 | error (_("Dwarf Error: Type Unit at offset 0x%x contains" |
16578 | " external reference to offset 0x%x [in module %s].\n"), | |
16579 | to_underlying (cu->header.sect_off), to_underlying (sect_off), | |
0d99eb77 DE |
16580 | bfd_get_filename (objfile->obfd)); |
16581 | } | |
9c541725 | 16582 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 16583 | objfile); |
72bf9492 | 16584 | |
0d99eb77 DE |
16585 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
16586 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 16587 | |
0d99eb77 | 16588 | per_cu->cu->last_used = 0; |
9c541725 | 16589 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
0d99eb77 | 16590 | } |
5afb4e99 | 16591 | |
dee91e82 DE |
16592 | /* If we didn't find it, and not all dies have been loaded, |
16593 | load them all and try again. */ | |
16594 | ||
5afb4e99 DJ |
16595 | if (pd == NULL && per_cu->load_all_dies == 0) |
16596 | { | |
5afb4e99 | 16597 | per_cu->load_all_dies = 1; |
fd820528 DE |
16598 | |
16599 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
16600 | THIS_CU->cu may already be in use. So we can't just free it and | |
16601 | replace its DIEs with the ones we read in. Instead, we leave those | |
16602 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
16603 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
16604 | set. */ | |
dee91e82 | 16605 | load_partial_comp_unit (per_cu); |
5afb4e99 | 16606 | |
9c541725 | 16607 | pd = find_partial_die_in_comp_unit (sect_off, per_cu->cu); |
5afb4e99 DJ |
16608 | } |
16609 | ||
16610 | if (pd == NULL) | |
16611 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
16612 | _("could not find partial DIE 0x%x " |
16613 | "in cache [from module %s]\n"), | |
9c541725 | 16614 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); |
5afb4e99 | 16615 | return pd; |
72bf9492 DJ |
16616 | } |
16617 | ||
abc72ce4 DE |
16618 | /* See if we can figure out if the class lives in a namespace. We do |
16619 | this by looking for a member function; its demangled name will | |
16620 | contain namespace info, if there is any. */ | |
16621 | ||
16622 | static void | |
16623 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
16624 | struct dwarf2_cu *cu) | |
16625 | { | |
16626 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
16627 | what template types look like, because the demangler | |
16628 | frequently doesn't give the same name as the debug info. We | |
16629 | could fix this by only using the demangled name to get the | |
16630 | prefix (but see comment in read_structure_type). */ | |
16631 | ||
16632 | struct partial_die_info *real_pdi; | |
16633 | struct partial_die_info *child_pdi; | |
16634 | ||
16635 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
16636 | we should not do this. We'll prepend the parent's fully qualified | |
16637 | name when we create the partial symbol. */ | |
16638 | ||
16639 | real_pdi = struct_pdi; | |
16640 | while (real_pdi->has_specification) | |
36586728 TT |
16641 | real_pdi = find_partial_die (real_pdi->spec_offset, |
16642 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
16643 | |
16644 | if (real_pdi->die_parent != NULL) | |
16645 | return; | |
16646 | ||
16647 | for (child_pdi = struct_pdi->die_child; | |
16648 | child_pdi != NULL; | |
16649 | child_pdi = child_pdi->die_sibling) | |
16650 | { | |
16651 | if (child_pdi->tag == DW_TAG_subprogram | |
16652 | && child_pdi->linkage_name != NULL) | |
16653 | { | |
16654 | char *actual_class_name | |
16655 | = language_class_name_from_physname (cu->language_defn, | |
16656 | child_pdi->linkage_name); | |
16657 | if (actual_class_name != NULL) | |
16658 | { | |
16659 | struct_pdi->name | |
224c3ddb SM |
16660 | = ((const char *) |
16661 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16662 | actual_class_name, | |
16663 | strlen (actual_class_name))); | |
abc72ce4 DE |
16664 | xfree (actual_class_name); |
16665 | } | |
16666 | break; | |
16667 | } | |
16668 | } | |
16669 | } | |
16670 | ||
72bf9492 DJ |
16671 | /* Adjust PART_DIE before generating a symbol for it. This function |
16672 | may set the is_external flag or change the DIE's name. */ | |
16673 | ||
16674 | static void | |
16675 | fixup_partial_die (struct partial_die_info *part_die, | |
16676 | struct dwarf2_cu *cu) | |
16677 | { | |
abc72ce4 DE |
16678 | /* Once we've fixed up a die, there's no point in doing so again. |
16679 | This also avoids a memory leak if we were to call | |
16680 | guess_partial_die_structure_name multiple times. */ | |
16681 | if (part_die->fixup_called) | |
16682 | return; | |
16683 | ||
72bf9492 DJ |
16684 | /* If we found a reference attribute and the DIE has no name, try |
16685 | to find a name in the referred to DIE. */ | |
16686 | ||
16687 | if (part_die->name == NULL && part_die->has_specification) | |
16688 | { | |
16689 | struct partial_die_info *spec_die; | |
72bf9492 | 16690 | |
36586728 TT |
16691 | spec_die = find_partial_die (part_die->spec_offset, |
16692 | part_die->spec_is_dwz, cu); | |
72bf9492 | 16693 | |
10b3939b | 16694 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
16695 | |
16696 | if (spec_die->name) | |
16697 | { | |
16698 | part_die->name = spec_die->name; | |
16699 | ||
16700 | /* Copy DW_AT_external attribute if it is set. */ | |
16701 | if (spec_die->is_external) | |
16702 | part_die->is_external = spec_die->is_external; | |
16703 | } | |
16704 | } | |
16705 | ||
16706 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
16707 | |
16708 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 16709 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 16710 | |
abc72ce4 DE |
16711 | /* If there is no parent die to provide a namespace, and there are |
16712 | children, see if we can determine the namespace from their linkage | |
122d1940 | 16713 | name. */ |
abc72ce4 | 16714 | if (cu->language == language_cplus |
8b70b953 | 16715 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16716 | && part_die->die_parent == NULL |
16717 | && part_die->has_children | |
16718 | && (part_die->tag == DW_TAG_class_type | |
16719 | || part_die->tag == DW_TAG_structure_type | |
16720 | || part_die->tag == DW_TAG_union_type)) | |
16721 | guess_partial_die_structure_name (part_die, cu); | |
16722 | ||
53832f31 TT |
16723 | /* GCC might emit a nameless struct or union that has a linkage |
16724 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16725 | if (part_die->name == NULL | |
96408a79 SA |
16726 | && (part_die->tag == DW_TAG_class_type |
16727 | || part_die->tag == DW_TAG_interface_type | |
16728 | || part_die->tag == DW_TAG_structure_type | |
16729 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
16730 | && part_die->linkage_name != NULL) |
16731 | { | |
16732 | char *demangled; | |
16733 | ||
8de20a37 | 16734 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
16735 | if (demangled) |
16736 | { | |
96408a79 SA |
16737 | const char *base; |
16738 | ||
16739 | /* Strip any leading namespaces/classes, keep only the base name. | |
16740 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16741 | base = strrchr (demangled, ':'); | |
16742 | if (base && base > demangled && base[-1] == ':') | |
16743 | base++; | |
16744 | else | |
16745 | base = demangled; | |
16746 | ||
34a68019 | 16747 | part_die->name |
224c3ddb SM |
16748 | = ((const char *) |
16749 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
16750 | base, strlen (base))); | |
53832f31 TT |
16751 | xfree (demangled); |
16752 | } | |
16753 | } | |
16754 | ||
abc72ce4 | 16755 | part_die->fixup_called = 1; |
72bf9492 DJ |
16756 | } |
16757 | ||
a8329558 | 16758 | /* Read an attribute value described by an attribute form. */ |
c906108c | 16759 | |
d521ce57 | 16760 | static const gdb_byte * |
dee91e82 DE |
16761 | read_attribute_value (const struct die_reader_specs *reader, |
16762 | struct attribute *attr, unsigned form, | |
43988095 | 16763 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 16764 | { |
dee91e82 | 16765 | struct dwarf2_cu *cu = reader->cu; |
3e29f34a MR |
16766 | struct objfile *objfile = cu->objfile; |
16767 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
dee91e82 | 16768 | bfd *abfd = reader->abfd; |
e7c27a73 | 16769 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
16770 | unsigned int bytes_read; |
16771 | struct dwarf_block *blk; | |
16772 | ||
aead7601 | 16773 | attr->form = (enum dwarf_form) form; |
a8329558 | 16774 | switch (form) |
c906108c | 16775 | { |
c906108c | 16776 | case DW_FORM_ref_addr: |
ae411497 | 16777 | if (cu->header.version == 2) |
4568ecf9 | 16778 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 16779 | else |
4568ecf9 DE |
16780 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
16781 | &cu->header, &bytes_read); | |
ae411497 TT |
16782 | info_ptr += bytes_read; |
16783 | break; | |
36586728 TT |
16784 | case DW_FORM_GNU_ref_alt: |
16785 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16786 | info_ptr += bytes_read; | |
16787 | break; | |
ae411497 | 16788 | case DW_FORM_addr: |
e7c27a73 | 16789 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 16790 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 16791 | info_ptr += bytes_read; |
c906108c SS |
16792 | break; |
16793 | case DW_FORM_block2: | |
7b5a2f43 | 16794 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16795 | blk->size = read_2_bytes (abfd, info_ptr); |
16796 | info_ptr += 2; | |
16797 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16798 | info_ptr += blk->size; | |
16799 | DW_BLOCK (attr) = blk; | |
16800 | break; | |
16801 | case DW_FORM_block4: | |
7b5a2f43 | 16802 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16803 | blk->size = read_4_bytes (abfd, info_ptr); |
16804 | info_ptr += 4; | |
16805 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16806 | info_ptr += blk->size; | |
16807 | DW_BLOCK (attr) = blk; | |
16808 | break; | |
16809 | case DW_FORM_data2: | |
16810 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
16811 | info_ptr += 2; | |
16812 | break; | |
16813 | case DW_FORM_data4: | |
16814 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
16815 | info_ptr += 4; | |
16816 | break; | |
16817 | case DW_FORM_data8: | |
16818 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
16819 | info_ptr += 8; | |
16820 | break; | |
0224619f JK |
16821 | case DW_FORM_data16: |
16822 | blk = dwarf_alloc_block (cu); | |
16823 | blk->size = 16; | |
16824 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
16825 | info_ptr += 16; | |
16826 | DW_BLOCK (attr) = blk; | |
16827 | break; | |
2dc7f7b3 TT |
16828 | case DW_FORM_sec_offset: |
16829 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
16830 | info_ptr += bytes_read; | |
16831 | break; | |
c906108c | 16832 | case DW_FORM_string: |
9b1c24c8 | 16833 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 16834 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
16835 | info_ptr += bytes_read; |
16836 | break; | |
4bdf3d34 | 16837 | case DW_FORM_strp: |
36586728 TT |
16838 | if (!cu->per_cu->is_dwz) |
16839 | { | |
16840 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
16841 | &bytes_read); | |
16842 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16843 | info_ptr += bytes_read; | |
16844 | break; | |
16845 | } | |
16846 | /* FALLTHROUGH */ | |
43988095 JK |
16847 | case DW_FORM_line_strp: |
16848 | if (!cu->per_cu->is_dwz) | |
16849 | { | |
16850 | DW_STRING (attr) = read_indirect_line_string (abfd, info_ptr, | |
16851 | cu_header, &bytes_read); | |
16852 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16853 | info_ptr += bytes_read; | |
16854 | break; | |
16855 | } | |
16856 | /* FALLTHROUGH */ | |
36586728 TT |
16857 | case DW_FORM_GNU_strp_alt: |
16858 | { | |
16859 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
16860 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
16861 | &bytes_read); | |
16862 | ||
16863 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
16864 | DW_STRING_IS_CANONICAL (attr) = 0; | |
16865 | info_ptr += bytes_read; | |
16866 | } | |
4bdf3d34 | 16867 | break; |
2dc7f7b3 | 16868 | case DW_FORM_exprloc: |
c906108c | 16869 | case DW_FORM_block: |
7b5a2f43 | 16870 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16871 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16872 | info_ptr += bytes_read; | |
16873 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16874 | info_ptr += blk->size; | |
16875 | DW_BLOCK (attr) = blk; | |
16876 | break; | |
16877 | case DW_FORM_block1: | |
7b5a2f43 | 16878 | blk = dwarf_alloc_block (cu); |
c906108c SS |
16879 | blk->size = read_1_byte (abfd, info_ptr); |
16880 | info_ptr += 1; | |
16881 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
16882 | info_ptr += blk->size; | |
16883 | DW_BLOCK (attr) = blk; | |
16884 | break; | |
16885 | case DW_FORM_data1: | |
16886 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16887 | info_ptr += 1; | |
16888 | break; | |
16889 | case DW_FORM_flag: | |
16890 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
16891 | info_ptr += 1; | |
16892 | break; | |
2dc7f7b3 TT |
16893 | case DW_FORM_flag_present: |
16894 | DW_UNSND (attr) = 1; | |
16895 | break; | |
c906108c SS |
16896 | case DW_FORM_sdata: |
16897 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16898 | info_ptr += bytes_read; | |
16899 | break; | |
16900 | case DW_FORM_udata: | |
16901 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16902 | info_ptr += bytes_read; | |
16903 | break; | |
16904 | case DW_FORM_ref1: | |
9c541725 | 16905 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16906 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
16907 | info_ptr += 1; |
16908 | break; | |
16909 | case DW_FORM_ref2: | |
9c541725 | 16910 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16911 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
16912 | info_ptr += 2; |
16913 | break; | |
16914 | case DW_FORM_ref4: | |
9c541725 | 16915 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16916 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
16917 | info_ptr += 4; |
16918 | break; | |
613e1657 | 16919 | case DW_FORM_ref8: |
9c541725 | 16920 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16921 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
16922 | info_ptr += 8; |
16923 | break; | |
55f1336d | 16924 | case DW_FORM_ref_sig8: |
ac9ec31b | 16925 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
16926 | info_ptr += 8; |
16927 | break; | |
c906108c | 16928 | case DW_FORM_ref_udata: |
9c541725 | 16929 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 16930 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
16931 | info_ptr += bytes_read; |
16932 | break; | |
c906108c | 16933 | case DW_FORM_indirect: |
a8329558 KW |
16934 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
16935 | info_ptr += bytes_read; | |
43988095 JK |
16936 | if (form == DW_FORM_implicit_const) |
16937 | { | |
16938 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
16939 | info_ptr += bytes_read; | |
16940 | } | |
16941 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
16942 | info_ptr); | |
16943 | break; | |
16944 | case DW_FORM_implicit_const: | |
16945 | DW_SND (attr) = implicit_const; | |
a8329558 | 16946 | break; |
3019eac3 DE |
16947 | case DW_FORM_GNU_addr_index: |
16948 | if (reader->dwo_file == NULL) | |
16949 | { | |
16950 | /* For now flag a hard error. | |
16951 | Later we can turn this into a complaint. */ | |
16952 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16953 | dwarf_form_name (form), | |
16954 | bfd_get_filename (abfd)); | |
16955 | } | |
16956 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
16957 | info_ptr += bytes_read; | |
16958 | break; | |
16959 | case DW_FORM_GNU_str_index: | |
16960 | if (reader->dwo_file == NULL) | |
16961 | { | |
16962 | /* For now flag a hard error. | |
16963 | Later we can turn this into a complaint if warranted. */ | |
16964 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
16965 | dwarf_form_name (form), | |
16966 | bfd_get_filename (abfd)); | |
16967 | } | |
16968 | { | |
16969 | ULONGEST str_index = | |
16970 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
16971 | ||
342587c4 | 16972 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 DE |
16973 | DW_STRING_IS_CANONICAL (attr) = 0; |
16974 | info_ptr += bytes_read; | |
16975 | } | |
16976 | break; | |
c906108c | 16977 | default: |
8a3fe4f8 | 16978 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
16979 | dwarf_form_name (form), |
16980 | bfd_get_filename (abfd)); | |
c906108c | 16981 | } |
28e94949 | 16982 | |
36586728 | 16983 | /* Super hack. */ |
7771576e | 16984 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
16985 | attr->form = DW_FORM_GNU_ref_alt; |
16986 | ||
28e94949 JB |
16987 | /* We have seen instances where the compiler tried to emit a byte |
16988 | size attribute of -1 which ended up being encoded as an unsigned | |
16989 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
16990 | an object of this size seems pretty unlikely so we can relatively | |
16991 | safely treat these cases as if the size attribute was invalid and | |
16992 | treat them as zero by default. */ | |
16993 | if (attr->name == DW_AT_byte_size | |
16994 | && form == DW_FORM_data4 | |
16995 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
16996 | { |
16997 | complaint | |
16998 | (&symfile_complaints, | |
43bbcdc2 PH |
16999 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
17000 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
17001 | DW_UNSND (attr) = 0; |
17002 | } | |
28e94949 | 17003 | |
c906108c SS |
17004 | return info_ptr; |
17005 | } | |
17006 | ||
a8329558 KW |
17007 | /* Read an attribute described by an abbreviated attribute. */ |
17008 | ||
d521ce57 | 17009 | static const gdb_byte * |
dee91e82 DE |
17010 | read_attribute (const struct die_reader_specs *reader, |
17011 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 17012 | const gdb_byte *info_ptr) |
a8329558 KW |
17013 | { |
17014 | attr->name = abbrev->name; | |
43988095 JK |
17015 | return read_attribute_value (reader, attr, abbrev->form, |
17016 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
17017 | } |
17018 | ||
0963b4bd | 17019 | /* Read dwarf information from a buffer. */ |
c906108c SS |
17020 | |
17021 | static unsigned int | |
a1855c1d | 17022 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17023 | { |
fe1b8b76 | 17024 | return bfd_get_8 (abfd, buf); |
c906108c SS |
17025 | } |
17026 | ||
17027 | static int | |
a1855c1d | 17028 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 17029 | { |
fe1b8b76 | 17030 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
17031 | } |
17032 | ||
17033 | static unsigned int | |
a1855c1d | 17034 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17035 | { |
fe1b8b76 | 17036 | return bfd_get_16 (abfd, buf); |
c906108c SS |
17037 | } |
17038 | ||
21ae7a4d | 17039 | static int |
a1855c1d | 17040 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17041 | { |
17042 | return bfd_get_signed_16 (abfd, buf); | |
17043 | } | |
17044 | ||
c906108c | 17045 | static unsigned int |
a1855c1d | 17046 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17047 | { |
fe1b8b76 | 17048 | return bfd_get_32 (abfd, buf); |
c906108c SS |
17049 | } |
17050 | ||
21ae7a4d | 17051 | static int |
a1855c1d | 17052 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
17053 | { |
17054 | return bfd_get_signed_32 (abfd, buf); | |
17055 | } | |
17056 | ||
93311388 | 17057 | static ULONGEST |
a1855c1d | 17058 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 17059 | { |
fe1b8b76 | 17060 | return bfd_get_64 (abfd, buf); |
c906108c SS |
17061 | } |
17062 | ||
17063 | static CORE_ADDR | |
d521ce57 | 17064 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 17065 | unsigned int *bytes_read) |
c906108c | 17066 | { |
e7c27a73 | 17067 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
17068 | CORE_ADDR retval = 0; |
17069 | ||
107d2387 | 17070 | if (cu_header->signed_addr_p) |
c906108c | 17071 | { |
107d2387 AC |
17072 | switch (cu_header->addr_size) |
17073 | { | |
17074 | case 2: | |
fe1b8b76 | 17075 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
17076 | break; |
17077 | case 4: | |
fe1b8b76 | 17078 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
17079 | break; |
17080 | case 8: | |
fe1b8b76 | 17081 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
17082 | break; |
17083 | default: | |
8e65ff28 | 17084 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 17085 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 17086 | bfd_get_filename (abfd)); |
107d2387 AC |
17087 | } |
17088 | } | |
17089 | else | |
17090 | { | |
17091 | switch (cu_header->addr_size) | |
17092 | { | |
17093 | case 2: | |
fe1b8b76 | 17094 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
17095 | break; |
17096 | case 4: | |
fe1b8b76 | 17097 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
17098 | break; |
17099 | case 8: | |
fe1b8b76 | 17100 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
17101 | break; |
17102 | default: | |
8e65ff28 | 17103 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
17104 | _("read_address: bad switch, " |
17105 | "unsigned [in module %s]"), | |
659b0389 | 17106 | bfd_get_filename (abfd)); |
107d2387 | 17107 | } |
c906108c | 17108 | } |
64367e0a | 17109 | |
107d2387 AC |
17110 | *bytes_read = cu_header->addr_size; |
17111 | return retval; | |
c906108c SS |
17112 | } |
17113 | ||
f7ef9339 | 17114 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
17115 | specification allows the initial length to take up either 4 bytes |
17116 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
17117 | bytes describe the length and all offsets will be 8 bytes in length | |
17118 | instead of 4. | |
17119 | ||
f7ef9339 KB |
17120 | An older, non-standard 64-bit format is also handled by this |
17121 | function. The older format in question stores the initial length | |
17122 | as an 8-byte quantity without an escape value. Lengths greater | |
17123 | than 2^32 aren't very common which means that the initial 4 bytes | |
17124 | is almost always zero. Since a length value of zero doesn't make | |
17125 | sense for the 32-bit format, this initial zero can be considered to | |
17126 | be an escape value which indicates the presence of the older 64-bit | |
17127 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
17128 | greater than 4GB. If it becomes necessary to handle lengths |
17129 | somewhat larger than 4GB, we could allow other small values (such | |
17130 | as the non-sensical values of 1, 2, and 3) to also be used as | |
17131 | escape values indicating the presence of the old format. | |
f7ef9339 | 17132 | |
917c78fc MK |
17133 | The value returned via bytes_read should be used to increment the |
17134 | relevant pointer after calling read_initial_length(). | |
c764a876 | 17135 | |
613e1657 KB |
17136 | [ Note: read_initial_length() and read_offset() are based on the |
17137 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 17138 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
17139 | from: |
17140 | ||
f7ef9339 | 17141 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 17142 | |
613e1657 KB |
17143 | This document is only a draft and is subject to change. (So beware.) |
17144 | ||
f7ef9339 | 17145 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
17146 | determined empirically by examining 64-bit ELF files produced by |
17147 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
17148 | |
17149 | - Kevin, July 16, 2002 | |
613e1657 KB |
17150 | ] */ |
17151 | ||
17152 | static LONGEST | |
d521ce57 | 17153 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 17154 | { |
fe1b8b76 | 17155 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 17156 | |
dd373385 | 17157 | if (length == 0xffffffff) |
613e1657 | 17158 | { |
fe1b8b76 | 17159 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 17160 | *bytes_read = 12; |
613e1657 | 17161 | } |
dd373385 | 17162 | else if (length == 0) |
f7ef9339 | 17163 | { |
dd373385 | 17164 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 17165 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 17166 | *bytes_read = 8; |
f7ef9339 | 17167 | } |
613e1657 KB |
17168 | else |
17169 | { | |
17170 | *bytes_read = 4; | |
613e1657 KB |
17171 | } |
17172 | ||
c764a876 DE |
17173 | return length; |
17174 | } | |
dd373385 | 17175 | |
c764a876 DE |
17176 | /* Cover function for read_initial_length. |
17177 | Returns the length of the object at BUF, and stores the size of the | |
17178 | initial length in *BYTES_READ and stores the size that offsets will be in | |
17179 | *OFFSET_SIZE. | |
17180 | If the initial length size is not equivalent to that specified in | |
17181 | CU_HEADER then issue a complaint. | |
17182 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 17183 | |
c764a876 | 17184 | static LONGEST |
d521ce57 | 17185 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
17186 | const struct comp_unit_head *cu_header, |
17187 | unsigned int *bytes_read, | |
17188 | unsigned int *offset_size) | |
17189 | { | |
17190 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
17191 | ||
17192 | gdb_assert (cu_header->initial_length_size == 4 | |
17193 | || cu_header->initial_length_size == 8 | |
17194 | || cu_header->initial_length_size == 12); | |
17195 | ||
17196 | if (cu_header->initial_length_size != *bytes_read) | |
17197 | complaint (&symfile_complaints, | |
17198 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 17199 | |
c764a876 | 17200 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 17201 | return length; |
613e1657 KB |
17202 | } |
17203 | ||
17204 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 17205 | given by cu_header->offset_size. */ |
613e1657 KB |
17206 | |
17207 | static LONGEST | |
d521ce57 TT |
17208 | read_offset (bfd *abfd, const gdb_byte *buf, |
17209 | const struct comp_unit_head *cu_header, | |
891d2f0b | 17210 | unsigned int *bytes_read) |
c764a876 DE |
17211 | { |
17212 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 17213 | |
c764a876 DE |
17214 | *bytes_read = cu_header->offset_size; |
17215 | return offset; | |
17216 | } | |
17217 | ||
17218 | /* Read an offset from the data stream. */ | |
17219 | ||
17220 | static LONGEST | |
d521ce57 | 17221 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
17222 | { |
17223 | LONGEST retval = 0; | |
17224 | ||
c764a876 | 17225 | switch (offset_size) |
613e1657 KB |
17226 | { |
17227 | case 4: | |
fe1b8b76 | 17228 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
17229 | break; |
17230 | case 8: | |
fe1b8b76 | 17231 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
17232 | break; |
17233 | default: | |
8e65ff28 | 17234 | internal_error (__FILE__, __LINE__, |
c764a876 | 17235 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 17236 | bfd_get_filename (abfd)); |
613e1657 KB |
17237 | } |
17238 | ||
917c78fc | 17239 | return retval; |
613e1657 KB |
17240 | } |
17241 | ||
d521ce57 TT |
17242 | static const gdb_byte * |
17243 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
17244 | { |
17245 | /* If the size of a host char is 8 bits, we can return a pointer | |
17246 | to the buffer, otherwise we have to copy the data to a buffer | |
17247 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17248 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 17249 | return buf; |
c906108c SS |
17250 | } |
17251 | ||
d521ce57 TT |
17252 | static const char * |
17253 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
17254 | unsigned int *bytes_read_ptr) | |
c906108c SS |
17255 | { |
17256 | /* If the size of a host char is 8 bits, we can return a pointer | |
17257 | to the string, otherwise we have to copy the string to a buffer | |
17258 | allocated on the temporary obstack. */ | |
4bdf3d34 | 17259 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
17260 | if (*buf == '\0') |
17261 | { | |
17262 | *bytes_read_ptr = 1; | |
17263 | return NULL; | |
17264 | } | |
d521ce57 TT |
17265 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
17266 | return (const char *) buf; | |
4bdf3d34 JJ |
17267 | } |
17268 | ||
43988095 JK |
17269 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
17270 | reporting strings FORM_NAME and SECT_NAME. */ | |
17271 | ||
d521ce57 | 17272 | static const char * |
43988095 JK |
17273 | read_indirect_string_at_offset_from (bfd *abfd, LONGEST str_offset, |
17274 | struct dwarf2_section_info *sect, | |
17275 | const char *form_name, | |
17276 | const char *sect_name) | |
17277 | { | |
17278 | dwarf2_read_section (dwarf2_per_objfile->objfile, sect); | |
17279 | if (sect->buffer == NULL) | |
17280 | error (_("%s used without %s section [in module %s]"), | |
17281 | form_name, sect_name, bfd_get_filename (abfd)); | |
17282 | if (str_offset >= sect->size) | |
17283 | error (_("%s pointing outside of %s section [in module %s]"), | |
17284 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 17285 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 17286 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 17287 | return NULL; |
43988095 JK |
17288 | return (const char *) (sect->buffer + str_offset); |
17289 | } | |
17290 | ||
17291 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
17292 | ||
17293 | static const char * | |
17294 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17295 | { | |
17296 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17297 | &dwarf2_per_objfile->str, | |
17298 | "DW_FORM_strp", ".debug_str"); | |
17299 | } | |
17300 | ||
17301 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
17302 | ||
17303 | static const char * | |
17304 | read_indirect_line_string_at_offset (bfd *abfd, LONGEST str_offset) | |
17305 | { | |
17306 | return read_indirect_string_at_offset_from (abfd, str_offset, | |
17307 | &dwarf2_per_objfile->line_str, | |
17308 | "DW_FORM_line_strp", | |
17309 | ".debug_line_str"); | |
c906108c SS |
17310 | } |
17311 | ||
36586728 TT |
17312 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
17313 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
17314 | the string consists of a single NUL byte, return NULL; otherwise | |
17315 | return a pointer to the string. */ | |
17316 | ||
d521ce57 | 17317 | static const char * |
36586728 TT |
17318 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
17319 | { | |
17320 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
17321 | ||
17322 | if (dwz->str.buffer == NULL) | |
17323 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
17324 | "section [in module %s]"), | |
17325 | bfd_get_filename (dwz->dwz_bfd)); | |
17326 | if (str_offset >= dwz->str.size) | |
17327 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
17328 | ".debug_str section [in module %s]"), | |
17329 | bfd_get_filename (dwz->dwz_bfd)); | |
17330 | gdb_assert (HOST_CHAR_BIT == 8); | |
17331 | if (dwz->str.buffer[str_offset] == '\0') | |
17332 | return NULL; | |
d521ce57 | 17333 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
17334 | } |
17335 | ||
43988095 JK |
17336 | /* Return pointer to string at .debug_str offset as read from BUF. |
17337 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17338 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17339 | ||
d521ce57 TT |
17340 | static const char * |
17341 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
17342 | const struct comp_unit_head *cu_header, |
17343 | unsigned int *bytes_read_ptr) | |
17344 | { | |
17345 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17346 | ||
17347 | return read_indirect_string_at_offset (abfd, str_offset); | |
17348 | } | |
17349 | ||
43988095 JK |
17350 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
17351 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
17352 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
17353 | ||
17354 | static const char * | |
17355 | read_indirect_line_string (bfd *abfd, const gdb_byte *buf, | |
17356 | const struct comp_unit_head *cu_header, | |
17357 | unsigned int *bytes_read_ptr) | |
17358 | { | |
17359 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
17360 | ||
17361 | return read_indirect_line_string_at_offset (abfd, str_offset); | |
17362 | } | |
17363 | ||
17364 | ULONGEST | |
d521ce57 | 17365 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 17366 | unsigned int *bytes_read_ptr) |
c906108c | 17367 | { |
12df843f | 17368 | ULONGEST result; |
ce5d95e1 | 17369 | unsigned int num_read; |
870f88f7 | 17370 | int shift; |
c906108c SS |
17371 | unsigned char byte; |
17372 | ||
17373 | result = 0; | |
17374 | shift = 0; | |
17375 | num_read = 0; | |
c906108c SS |
17376 | while (1) |
17377 | { | |
fe1b8b76 | 17378 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17379 | buf++; |
17380 | num_read++; | |
12df843f | 17381 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
17382 | if ((byte & 128) == 0) |
17383 | { | |
17384 | break; | |
17385 | } | |
17386 | shift += 7; | |
17387 | } | |
17388 | *bytes_read_ptr = num_read; | |
17389 | return result; | |
17390 | } | |
17391 | ||
12df843f | 17392 | static LONGEST |
d521ce57 TT |
17393 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
17394 | unsigned int *bytes_read_ptr) | |
c906108c | 17395 | { |
12df843f | 17396 | LONGEST result; |
870f88f7 | 17397 | int shift, num_read; |
c906108c SS |
17398 | unsigned char byte; |
17399 | ||
17400 | result = 0; | |
17401 | shift = 0; | |
c906108c | 17402 | num_read = 0; |
c906108c SS |
17403 | while (1) |
17404 | { | |
fe1b8b76 | 17405 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
17406 | buf++; |
17407 | num_read++; | |
12df843f | 17408 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
17409 | shift += 7; |
17410 | if ((byte & 128) == 0) | |
17411 | { | |
17412 | break; | |
17413 | } | |
17414 | } | |
77e0b926 | 17415 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 17416 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
17417 | *bytes_read_ptr = num_read; |
17418 | return result; | |
17419 | } | |
17420 | ||
3019eac3 DE |
17421 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
17422 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
17423 | ADDR_SIZE is the size of addresses from the CU header. */ | |
17424 | ||
17425 | static CORE_ADDR | |
17426 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
17427 | { | |
17428 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17429 | bfd *abfd = objfile->obfd; | |
17430 | const gdb_byte *info_ptr; | |
17431 | ||
17432 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
17433 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
17434 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 17435 | objfile_name (objfile)); |
3019eac3 DE |
17436 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
17437 | error (_("DW_FORM_addr_index pointing outside of " | |
17438 | ".debug_addr section [in module %s]"), | |
4262abfb | 17439 | objfile_name (objfile)); |
3019eac3 DE |
17440 | info_ptr = (dwarf2_per_objfile->addr.buffer |
17441 | + addr_base + addr_index * addr_size); | |
17442 | if (addr_size == 4) | |
17443 | return bfd_get_32 (abfd, info_ptr); | |
17444 | else | |
17445 | return bfd_get_64 (abfd, info_ptr); | |
17446 | } | |
17447 | ||
17448 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
17449 | ||
17450 | static CORE_ADDR | |
17451 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
17452 | { | |
17453 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
17454 | } | |
17455 | ||
17456 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
17457 | ||
17458 | static CORE_ADDR | |
d521ce57 | 17459 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
17460 | unsigned int *bytes_read) |
17461 | { | |
17462 | bfd *abfd = cu->objfile->obfd; | |
17463 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
17464 | ||
17465 | return read_addr_index (cu, addr_index); | |
17466 | } | |
17467 | ||
17468 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
17469 | back to dwarf2_read_addr_index. */ | |
17470 | ||
17471 | struct dwarf2_read_addr_index_data | |
17472 | { | |
17473 | ULONGEST addr_base; | |
17474 | int addr_size; | |
17475 | }; | |
17476 | ||
17477 | /* die_reader_func for dwarf2_read_addr_index. */ | |
17478 | ||
17479 | static void | |
17480 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 17481 | const gdb_byte *info_ptr, |
3019eac3 DE |
17482 | struct die_info *comp_unit_die, |
17483 | int has_children, | |
17484 | void *data) | |
17485 | { | |
17486 | struct dwarf2_cu *cu = reader->cu; | |
17487 | struct dwarf2_read_addr_index_data *aidata = | |
17488 | (struct dwarf2_read_addr_index_data *) data; | |
17489 | ||
17490 | aidata->addr_base = cu->addr_base; | |
17491 | aidata->addr_size = cu->header.addr_size; | |
17492 | } | |
17493 | ||
17494 | /* Given an index in .debug_addr, fetch the value. | |
17495 | NOTE: This can be called during dwarf expression evaluation, | |
17496 | long after the debug information has been read, and thus per_cu->cu | |
17497 | may no longer exist. */ | |
17498 | ||
17499 | CORE_ADDR | |
17500 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
17501 | unsigned int addr_index) | |
17502 | { | |
17503 | struct objfile *objfile = per_cu->objfile; | |
17504 | struct dwarf2_cu *cu = per_cu->cu; | |
17505 | ULONGEST addr_base; | |
17506 | int addr_size; | |
17507 | ||
17508 | /* This is intended to be called from outside this file. */ | |
17509 | dw2_setup (objfile); | |
17510 | ||
17511 | /* We need addr_base and addr_size. | |
17512 | If we don't have PER_CU->cu, we have to get it. | |
17513 | Nasty, but the alternative is storing the needed info in PER_CU, | |
17514 | which at this point doesn't seem justified: it's not clear how frequently | |
17515 | it would get used and it would increase the size of every PER_CU. | |
17516 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
17517 | so we're not in uncharted territory here. | |
17518 | Alas we need to be a bit more complicated as addr_base is contained | |
17519 | in the DIE. | |
17520 | ||
17521 | We don't need to read the entire CU(/TU). | |
17522 | We just need the header and top level die. | |
a1b64ce1 | 17523 | |
3019eac3 | 17524 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 17525 | For now we skip this optimization. */ |
3019eac3 DE |
17526 | |
17527 | if (cu != NULL) | |
17528 | { | |
17529 | addr_base = cu->addr_base; | |
17530 | addr_size = cu->header.addr_size; | |
17531 | } | |
17532 | else | |
17533 | { | |
17534 | struct dwarf2_read_addr_index_data aidata; | |
17535 | ||
a1b64ce1 DE |
17536 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
17537 | we need addr_base. */ | |
17538 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
17539 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
17540 | addr_base = aidata.addr_base; |
17541 | addr_size = aidata.addr_size; | |
17542 | } | |
17543 | ||
17544 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
17545 | } | |
17546 | ||
57d63ce2 DE |
17547 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
17548 | This is only used by the Fission support. */ | |
3019eac3 | 17549 | |
d521ce57 | 17550 | static const char * |
342587c4 | 17551 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 DE |
17552 | { |
17553 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
c5164cbc | 17554 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 17555 | bfd *abfd = objfile->obfd; |
342587c4 | 17556 | struct dwarf2_cu *cu = reader->cu; |
73869dc2 DE |
17557 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
17558 | struct dwarf2_section_info *str_offsets_section = | |
17559 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 17560 | const gdb_byte *info_ptr; |
3019eac3 | 17561 | ULONGEST str_offset; |
57d63ce2 | 17562 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 | 17563 | |
73869dc2 DE |
17564 | dwarf2_read_section (objfile, str_section); |
17565 | dwarf2_read_section (objfile, str_offsets_section); | |
17566 | if (str_section->buffer == NULL) | |
57d63ce2 | 17567 | error (_("%s used without .debug_str.dwo section" |
9c541725 PA |
17568 | " in CU at offset 0x%x [in module %s]"), |
17569 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17570 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 17571 | error (_("%s used without .debug_str_offsets.dwo section" |
9c541725 PA |
17572 | " in CU at offset 0x%x [in module %s]"), |
17573 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17574 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 17575 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9c541725 PA |
17576 | " section in CU at offset 0x%x [in module %s]"), |
17577 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17578 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
17579 | + str_index * cu->header.offset_size); |
17580 | if (cu->header.offset_size == 4) | |
17581 | str_offset = bfd_get_32 (abfd, info_ptr); | |
17582 | else | |
17583 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 17584 | if (str_offset >= str_section->size) |
57d63ce2 | 17585 | error (_("Offset from %s pointing outside of" |
9c541725 PA |
17586 | " .debug_str.dwo section in CU at offset 0x%x [in module %s]"), |
17587 | form_name, to_underlying (cu->header.sect_off), objf_name); | |
73869dc2 | 17588 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
17589 | } |
17590 | ||
3019eac3 DE |
17591 | /* Return the length of an LEB128 number in BUF. */ |
17592 | ||
17593 | static int | |
17594 | leb128_size (const gdb_byte *buf) | |
17595 | { | |
17596 | const gdb_byte *begin = buf; | |
17597 | gdb_byte byte; | |
17598 | ||
17599 | while (1) | |
17600 | { | |
17601 | byte = *buf++; | |
17602 | if ((byte & 128) == 0) | |
17603 | return buf - begin; | |
17604 | } | |
17605 | } | |
17606 | ||
c906108c | 17607 | static void |
e142c38c | 17608 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
17609 | { |
17610 | switch (lang) | |
17611 | { | |
17612 | case DW_LANG_C89: | |
76bee0cc | 17613 | case DW_LANG_C99: |
0cfd832f | 17614 | case DW_LANG_C11: |
c906108c | 17615 | case DW_LANG_C: |
d1be3247 | 17616 | case DW_LANG_UPC: |
e142c38c | 17617 | cu->language = language_c; |
c906108c | 17618 | break; |
9c37b5ae | 17619 | case DW_LANG_Java: |
c906108c | 17620 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
17621 | case DW_LANG_C_plus_plus_11: |
17622 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 17623 | cu->language = language_cplus; |
c906108c | 17624 | break; |
6aecb9c2 JB |
17625 | case DW_LANG_D: |
17626 | cu->language = language_d; | |
17627 | break; | |
c906108c SS |
17628 | case DW_LANG_Fortran77: |
17629 | case DW_LANG_Fortran90: | |
b21b22e0 | 17630 | case DW_LANG_Fortran95: |
f7de9aab MW |
17631 | case DW_LANG_Fortran03: |
17632 | case DW_LANG_Fortran08: | |
e142c38c | 17633 | cu->language = language_fortran; |
c906108c | 17634 | break; |
a766d390 DE |
17635 | case DW_LANG_Go: |
17636 | cu->language = language_go; | |
17637 | break; | |
c906108c | 17638 | case DW_LANG_Mips_Assembler: |
e142c38c | 17639 | cu->language = language_asm; |
c906108c SS |
17640 | break; |
17641 | case DW_LANG_Ada83: | |
8aaf0b47 | 17642 | case DW_LANG_Ada95: |
bc5f45f8 JB |
17643 | cu->language = language_ada; |
17644 | break; | |
72019c9c GM |
17645 | case DW_LANG_Modula2: |
17646 | cu->language = language_m2; | |
17647 | break; | |
fe8e67fd PM |
17648 | case DW_LANG_Pascal83: |
17649 | cu->language = language_pascal; | |
17650 | break; | |
22566fbd DJ |
17651 | case DW_LANG_ObjC: |
17652 | cu->language = language_objc; | |
17653 | break; | |
c44af4eb TT |
17654 | case DW_LANG_Rust: |
17655 | case DW_LANG_Rust_old: | |
17656 | cu->language = language_rust; | |
17657 | break; | |
c906108c SS |
17658 | case DW_LANG_Cobol74: |
17659 | case DW_LANG_Cobol85: | |
c906108c | 17660 | default: |
e142c38c | 17661 | cu->language = language_minimal; |
c906108c SS |
17662 | break; |
17663 | } | |
e142c38c | 17664 | cu->language_defn = language_def (cu->language); |
c906108c SS |
17665 | } |
17666 | ||
17667 | /* Return the named attribute or NULL if not there. */ | |
17668 | ||
17669 | static struct attribute * | |
e142c38c | 17670 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 17671 | { |
a48e046c | 17672 | for (;;) |
c906108c | 17673 | { |
a48e046c TT |
17674 | unsigned int i; |
17675 | struct attribute *spec = NULL; | |
17676 | ||
17677 | for (i = 0; i < die->num_attrs; ++i) | |
17678 | { | |
17679 | if (die->attrs[i].name == name) | |
17680 | return &die->attrs[i]; | |
17681 | if (die->attrs[i].name == DW_AT_specification | |
17682 | || die->attrs[i].name == DW_AT_abstract_origin) | |
17683 | spec = &die->attrs[i]; | |
17684 | } | |
17685 | ||
17686 | if (!spec) | |
17687 | break; | |
c906108c | 17688 | |
f2f0e013 | 17689 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 17690 | } |
c5aa993b | 17691 | |
c906108c SS |
17692 | return NULL; |
17693 | } | |
17694 | ||
348e048f DE |
17695 | /* Return the named attribute or NULL if not there, |
17696 | but do not follow DW_AT_specification, etc. | |
17697 | This is for use in contexts where we're reading .debug_types dies. | |
17698 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
17699 | back up the chain, and we want to go down. */ | |
17700 | ||
17701 | static struct attribute * | |
45e58e77 | 17702 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
17703 | { |
17704 | unsigned int i; | |
17705 | ||
17706 | for (i = 0; i < die->num_attrs; ++i) | |
17707 | if (die->attrs[i].name == name) | |
17708 | return &die->attrs[i]; | |
17709 | ||
17710 | return NULL; | |
17711 | } | |
17712 | ||
7d45c7c3 KB |
17713 | /* Return the string associated with a string-typed attribute, or NULL if it |
17714 | is either not found or is of an incorrect type. */ | |
17715 | ||
17716 | static const char * | |
17717 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
17718 | { | |
17719 | struct attribute *attr; | |
17720 | const char *str = NULL; | |
17721 | ||
17722 | attr = dwarf2_attr (die, name, cu); | |
17723 | ||
17724 | if (attr != NULL) | |
17725 | { | |
43988095 | 17726 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 L |
17727 | || attr->form == DW_FORM_string |
17728 | || attr->form == DW_FORM_GNU_str_index | |
16eb6b2d | 17729 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
17730 | str = DW_STRING (attr); |
17731 | else | |
17732 | complaint (&symfile_complaints, | |
17733 | _("string type expected for attribute %s for " | |
17734 | "DIE at 0x%x in module %s"), | |
9c541725 | 17735 | dwarf_attr_name (name), to_underlying (die->sect_off), |
7d45c7c3 KB |
17736 | objfile_name (cu->objfile)); |
17737 | } | |
17738 | ||
17739 | return str; | |
17740 | } | |
17741 | ||
05cf31d1 JB |
17742 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
17743 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 17744 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
17745 | |
17746 | static int | |
17747 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
17748 | { | |
17749 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
17750 | ||
17751 | return (attr && DW_UNSND (attr)); | |
17752 | } | |
17753 | ||
3ca72b44 | 17754 | static int |
e142c38c | 17755 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 17756 | { |
05cf31d1 JB |
17757 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
17758 | which value is non-zero. However, we have to be careful with | |
17759 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
17760 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
17761 | end up accidently finding a declaration attribute that belongs | |
17762 | to a different DIE referenced by the specification attribute, | |
17763 | even though the given DIE does not have a declaration attribute. */ | |
17764 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
17765 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
17766 | } |
17767 | ||
63d06c5c | 17768 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 17769 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
17770 | containing the return value on output. If there is no |
17771 | specification, but there is an abstract origin, that is | |
17772 | returned. */ | |
63d06c5c DC |
17773 | |
17774 | static struct die_info * | |
f2f0e013 | 17775 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 17776 | { |
f2f0e013 DJ |
17777 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
17778 | *spec_cu); | |
63d06c5c | 17779 | |
edb3359d DJ |
17780 | if (spec_attr == NULL) |
17781 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
17782 | ||
63d06c5c DC |
17783 | if (spec_attr == NULL) |
17784 | return NULL; | |
17785 | else | |
f2f0e013 | 17786 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 17787 | } |
c906108c | 17788 | |
527f3840 JK |
17789 | /* Stub for free_line_header to match void * callback types. */ |
17790 | ||
17791 | static void | |
17792 | free_line_header_voidp (void *arg) | |
17793 | { | |
9a3c8263 | 17794 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 17795 | |
fff8551c | 17796 | delete lh; |
527f3840 JK |
17797 | } |
17798 | ||
fff8551c PA |
17799 | void |
17800 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 17801 | { |
27e0867f | 17802 | if (dwarf_line_debug >= 2) |
fff8551c PA |
17803 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", |
17804 | include_dirs.size () + 1, include_dir); | |
27e0867f | 17805 | |
fff8551c | 17806 | include_dirs.push_back (include_dir); |
debd256d | 17807 | } |
6e70227d | 17808 | |
fff8551c PA |
17809 | void |
17810 | line_header::add_file_name (const char *name, | |
ecfb656c | 17811 | dir_index d_index, |
fff8551c PA |
17812 | unsigned int mod_time, |
17813 | unsigned int length) | |
debd256d | 17814 | { |
27e0867f DE |
17815 | if (dwarf_line_debug >= 2) |
17816 | fprintf_unfiltered (gdb_stdlog, "Adding file %u: %s\n", | |
fff8551c | 17817 | (unsigned) file_names.size () + 1, name); |
27e0867f | 17818 | |
ecfb656c | 17819 | file_names.emplace_back (name, d_index, mod_time, length); |
debd256d | 17820 | } |
6e70227d | 17821 | |
83769d0b | 17822 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
17823 | |
17824 | static struct dwarf2_section_info * | |
17825 | get_debug_line_section (struct dwarf2_cu *cu) | |
17826 | { | |
17827 | struct dwarf2_section_info *section; | |
17828 | ||
17829 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
17830 | DWO file. */ | |
17831 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
17832 | section = &cu->dwo_unit->dwo_file->sections.line; | |
17833 | else if (cu->per_cu->is_dwz) | |
17834 | { | |
17835 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
17836 | ||
17837 | section = &dwz->line; | |
17838 | } | |
17839 | else | |
17840 | section = &dwarf2_per_objfile->line; | |
17841 | ||
17842 | return section; | |
17843 | } | |
17844 | ||
43988095 JK |
17845 | /* Read directory or file name entry format, starting with byte of |
17846 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
17847 | entries count and the entries themselves in the described entry | |
17848 | format. */ | |
17849 | ||
17850 | static void | |
17851 | read_formatted_entries (bfd *abfd, const gdb_byte **bufp, | |
17852 | struct line_header *lh, | |
17853 | const struct comp_unit_head *cu_header, | |
17854 | void (*callback) (struct line_header *lh, | |
17855 | const char *name, | |
ecfb656c | 17856 | dir_index d_index, |
43988095 JK |
17857 | unsigned int mod_time, |
17858 | unsigned int length)) | |
17859 | { | |
17860 | gdb_byte format_count, formati; | |
17861 | ULONGEST data_count, datai; | |
17862 | const gdb_byte *buf = *bufp; | |
17863 | const gdb_byte *format_header_data; | |
17864 | int i; | |
17865 | unsigned int bytes_read; | |
17866 | ||
17867 | format_count = read_1_byte (abfd, buf); | |
17868 | buf += 1; | |
17869 | format_header_data = buf; | |
17870 | for (formati = 0; formati < format_count; formati++) | |
17871 | { | |
17872 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17873 | buf += bytes_read; | |
17874 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17875 | buf += bytes_read; | |
17876 | } | |
17877 | ||
17878 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
17879 | buf += bytes_read; | |
17880 | for (datai = 0; datai < data_count; datai++) | |
17881 | { | |
17882 | const gdb_byte *format = format_header_data; | |
17883 | struct file_entry fe; | |
17884 | ||
43988095 JK |
17885 | for (formati = 0; formati < format_count; formati++) |
17886 | { | |
ecfb656c | 17887 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 17888 | format += bytes_read; |
43988095 | 17889 | |
ecfb656c | 17890 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 17891 | format += bytes_read; |
ecfb656c PA |
17892 | |
17893 | gdb::optional<const char *> string; | |
17894 | gdb::optional<unsigned int> uint; | |
17895 | ||
43988095 JK |
17896 | switch (form) |
17897 | { | |
17898 | case DW_FORM_string: | |
ecfb656c | 17899 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
17900 | buf += bytes_read; |
17901 | break; | |
17902 | ||
17903 | case DW_FORM_line_strp: | |
ecfb656c PA |
17904 | string.emplace (read_indirect_line_string (abfd, buf, |
17905 | cu_header, | |
17906 | &bytes_read)); | |
43988095 JK |
17907 | buf += bytes_read; |
17908 | break; | |
17909 | ||
17910 | case DW_FORM_data1: | |
ecfb656c | 17911 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
17912 | buf += 1; |
17913 | break; | |
17914 | ||
17915 | case DW_FORM_data2: | |
ecfb656c | 17916 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
17917 | buf += 2; |
17918 | break; | |
17919 | ||
17920 | case DW_FORM_data4: | |
ecfb656c | 17921 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
17922 | buf += 4; |
17923 | break; | |
17924 | ||
17925 | case DW_FORM_data8: | |
ecfb656c | 17926 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
17927 | buf += 8; |
17928 | break; | |
17929 | ||
17930 | case DW_FORM_udata: | |
ecfb656c | 17931 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
17932 | buf += bytes_read; |
17933 | break; | |
17934 | ||
17935 | case DW_FORM_block: | |
17936 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
17937 | current GDB. */ | |
17938 | break; | |
17939 | } | |
ecfb656c PA |
17940 | |
17941 | switch (content_type) | |
17942 | { | |
17943 | case DW_LNCT_path: | |
17944 | if (string.has_value ()) | |
17945 | fe.name = *string; | |
17946 | break; | |
17947 | case DW_LNCT_directory_index: | |
17948 | if (uint.has_value ()) | |
17949 | fe.d_index = (dir_index) *uint; | |
17950 | break; | |
17951 | case DW_LNCT_timestamp: | |
17952 | if (uint.has_value ()) | |
17953 | fe.mod_time = *uint; | |
17954 | break; | |
17955 | case DW_LNCT_size: | |
17956 | if (uint.has_value ()) | |
17957 | fe.length = *uint; | |
17958 | break; | |
17959 | case DW_LNCT_MD5: | |
17960 | break; | |
17961 | default: | |
17962 | complaint (&symfile_complaints, | |
17963 | _("Unknown format content type %s"), | |
17964 | pulongest (content_type)); | |
17965 | } | |
43988095 JK |
17966 | } |
17967 | ||
ecfb656c | 17968 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
17969 | } |
17970 | ||
17971 | *bufp = buf; | |
17972 | } | |
17973 | ||
debd256d | 17974 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 17975 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 17976 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
17977 | Returns NULL if there is a problem reading the header, e.g., if it |
17978 | has a version we don't understand. | |
debd256d JB |
17979 | |
17980 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
17981 | the returned object point into the dwarf line section buffer, |
17982 | and must not be freed. */ | |
ae2de4f8 | 17983 | |
fff8551c | 17984 | static line_header_up |
9c541725 | 17985 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 17986 | { |
d521ce57 | 17987 | const gdb_byte *line_ptr; |
c764a876 | 17988 | unsigned int bytes_read, offset_size; |
debd256d | 17989 | int i; |
d521ce57 | 17990 | const char *cur_dir, *cur_file; |
3019eac3 DE |
17991 | struct dwarf2_section_info *section; |
17992 | bfd *abfd; | |
17993 | ||
36586728 | 17994 | section = get_debug_line_section (cu); |
3019eac3 DE |
17995 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
17996 | if (section->buffer == NULL) | |
debd256d | 17997 | { |
3019eac3 DE |
17998 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
17999 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
18000 | else | |
18001 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
18002 | return 0; |
18003 | } | |
18004 | ||
fceca515 DE |
18005 | /* We can't do this until we know the section is non-empty. |
18006 | Only then do we know we have such a section. */ | |
a32a8923 | 18007 | abfd = get_section_bfd_owner (section); |
fceca515 | 18008 | |
a738430d MK |
18009 | /* Make sure that at least there's room for the total_length field. |
18010 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 18011 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 18012 | { |
4d3c2250 | 18013 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18014 | return 0; |
18015 | } | |
18016 | ||
fff8551c | 18017 | line_header_up lh (new line_header ()); |
debd256d | 18018 | |
9c541725 | 18019 | lh->sect_off = sect_off; |
527f3840 JK |
18020 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
18021 | ||
9c541725 | 18022 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 18023 | |
a738430d | 18024 | /* Read in the header. */ |
6e70227d | 18025 | lh->total_length = |
c764a876 DE |
18026 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
18027 | &bytes_read, &offset_size); | |
debd256d | 18028 | line_ptr += bytes_read; |
3019eac3 | 18029 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 18030 | { |
4d3c2250 | 18031 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
18032 | return 0; |
18033 | } | |
18034 | lh->statement_program_end = line_ptr + lh->total_length; | |
18035 | lh->version = read_2_bytes (abfd, line_ptr); | |
18036 | line_ptr += 2; | |
43988095 | 18037 | if (lh->version > 5) |
cd366ee8 DE |
18038 | { |
18039 | /* This is a version we don't understand. The format could have | |
18040 | changed in ways we don't handle properly so just punt. */ | |
18041 | complaint (&symfile_complaints, | |
18042 | _("unsupported version in .debug_line section")); | |
18043 | return NULL; | |
18044 | } | |
43988095 JK |
18045 | if (lh->version >= 5) |
18046 | { | |
18047 | gdb_byte segment_selector_size; | |
18048 | ||
18049 | /* Skip address size. */ | |
18050 | read_1_byte (abfd, line_ptr); | |
18051 | line_ptr += 1; | |
18052 | ||
18053 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
18054 | line_ptr += 1; | |
18055 | if (segment_selector_size != 0) | |
18056 | { | |
18057 | complaint (&symfile_complaints, | |
18058 | _("unsupported segment selector size %u " | |
18059 | "in .debug_line section"), | |
18060 | segment_selector_size); | |
18061 | return NULL; | |
18062 | } | |
18063 | } | |
c764a876 DE |
18064 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
18065 | line_ptr += offset_size; | |
debd256d JB |
18066 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
18067 | line_ptr += 1; | |
2dc7f7b3 TT |
18068 | if (lh->version >= 4) |
18069 | { | |
18070 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
18071 | line_ptr += 1; | |
18072 | } | |
18073 | else | |
18074 | lh->maximum_ops_per_instruction = 1; | |
18075 | ||
18076 | if (lh->maximum_ops_per_instruction == 0) | |
18077 | { | |
18078 | lh->maximum_ops_per_instruction = 1; | |
18079 | complaint (&symfile_complaints, | |
3e43a32a MS |
18080 | _("invalid maximum_ops_per_instruction " |
18081 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
18082 | } |
18083 | ||
debd256d JB |
18084 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
18085 | line_ptr += 1; | |
18086 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
18087 | line_ptr += 1; | |
18088 | lh->line_range = read_1_byte (abfd, line_ptr); | |
18089 | line_ptr += 1; | |
18090 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
18091 | line_ptr += 1; | |
fff8551c | 18092 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
18093 | |
18094 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
18095 | for (i = 1; i < lh->opcode_base; ++i) | |
18096 | { | |
18097 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
18098 | line_ptr += 1; | |
18099 | } | |
18100 | ||
43988095 | 18101 | if (lh->version >= 5) |
debd256d | 18102 | { |
43988095 | 18103 | /* Read directory table. */ |
fff8551c PA |
18104 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18105 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18106 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18107 | unsigned int length) |
18108 | { | |
18109 | lh->add_include_dir (name); | |
18110 | }); | |
debd256d | 18111 | |
43988095 | 18112 | /* Read file name table. */ |
fff8551c PA |
18113 | read_formatted_entries (abfd, &line_ptr, lh.get (), &cu->header, |
18114 | [] (struct line_header *lh, const char *name, | |
ecfb656c | 18115 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
18116 | unsigned int length) |
18117 | { | |
ecfb656c | 18118 | lh->add_file_name (name, d_index, mod_time, length); |
fff8551c | 18119 | }); |
43988095 JK |
18120 | } |
18121 | else | |
debd256d | 18122 | { |
43988095 JK |
18123 | /* Read directory table. */ |
18124 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18125 | { | |
18126 | line_ptr += bytes_read; | |
fff8551c | 18127 | lh->add_include_dir (cur_dir); |
43988095 | 18128 | } |
debd256d JB |
18129 | line_ptr += bytes_read; |
18130 | ||
43988095 JK |
18131 | /* Read file name table. */ |
18132 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
18133 | { | |
ecfb656c PA |
18134 | unsigned int mod_time, length; |
18135 | dir_index d_index; | |
43988095 JK |
18136 | |
18137 | line_ptr += bytes_read; | |
ecfb656c | 18138 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
18139 | line_ptr += bytes_read; |
18140 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18141 | line_ptr += bytes_read; | |
18142 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18143 | line_ptr += bytes_read; | |
18144 | ||
ecfb656c | 18145 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
18146 | } |
18147 | line_ptr += bytes_read; | |
debd256d | 18148 | } |
6e70227d | 18149 | lh->statement_program_start = line_ptr; |
debd256d | 18150 | |
3019eac3 | 18151 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 18152 | complaint (&symfile_complaints, |
3e43a32a MS |
18153 | _("line number info header doesn't " |
18154 | "fit in `.debug_line' section")); | |
debd256d | 18155 | |
debd256d JB |
18156 | return lh; |
18157 | } | |
c906108c | 18158 | |
c6da4cef DE |
18159 | /* Subroutine of dwarf_decode_lines to simplify it. |
18160 | Return the file name of the psymtab for included file FILE_INDEX | |
18161 | in line header LH of PST. | |
18162 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18163 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
18164 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
18165 | ||
18166 | The function creates dangling cleanup registration. */ | |
c6da4cef | 18167 | |
d521ce57 | 18168 | static const char * |
c6da4cef DE |
18169 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
18170 | const struct partial_symtab *pst, | |
18171 | const char *comp_dir) | |
18172 | { | |
8c43009f | 18173 | const file_entry &fe = lh->file_names[file_index]; |
d521ce57 TT |
18174 | const char *include_name = fe.name; |
18175 | const char *include_name_to_compare = include_name; | |
72b9f47f TT |
18176 | const char *pst_filename; |
18177 | char *copied_name = NULL; | |
c6da4cef DE |
18178 | int file_is_pst; |
18179 | ||
8c43009f | 18180 | const char *dir_name = fe.include_dir (lh); |
c6da4cef DE |
18181 | |
18182 | if (!IS_ABSOLUTE_PATH (include_name) | |
18183 | && (dir_name != NULL || comp_dir != NULL)) | |
18184 | { | |
18185 | /* Avoid creating a duplicate psymtab for PST. | |
18186 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
18187 | Before we do the comparison, however, we need to account | |
18188 | for DIR_NAME and COMP_DIR. | |
18189 | First prepend dir_name (if non-NULL). If we still don't | |
18190 | have an absolute path prepend comp_dir (if non-NULL). | |
18191 | However, the directory we record in the include-file's | |
18192 | psymtab does not contain COMP_DIR (to match the | |
18193 | corresponding symtab(s)). | |
18194 | ||
18195 | Example: | |
18196 | ||
18197 | bash$ cd /tmp | |
18198 | bash$ gcc -g ./hello.c | |
18199 | include_name = "hello.c" | |
18200 | dir_name = "." | |
18201 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
18202 | DW_AT_name = "./hello.c" |
18203 | ||
18204 | */ | |
c6da4cef DE |
18205 | |
18206 | if (dir_name != NULL) | |
18207 | { | |
d521ce57 TT |
18208 | char *tem = concat (dir_name, SLASH_STRING, |
18209 | include_name, (char *)NULL); | |
18210 | ||
18211 | make_cleanup (xfree, tem); | |
18212 | include_name = tem; | |
c6da4cef | 18213 | include_name_to_compare = include_name; |
c6da4cef DE |
18214 | } |
18215 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
18216 | { | |
d521ce57 TT |
18217 | char *tem = concat (comp_dir, SLASH_STRING, |
18218 | include_name, (char *)NULL); | |
18219 | ||
18220 | make_cleanup (xfree, tem); | |
18221 | include_name_to_compare = tem; | |
c6da4cef DE |
18222 | } |
18223 | } | |
18224 | ||
18225 | pst_filename = pst->filename; | |
18226 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
18227 | { | |
72b9f47f TT |
18228 | copied_name = concat (pst->dirname, SLASH_STRING, |
18229 | pst_filename, (char *)NULL); | |
18230 | pst_filename = copied_name; | |
c6da4cef DE |
18231 | } |
18232 | ||
1e3fad37 | 18233 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 18234 | |
72b9f47f TT |
18235 | if (copied_name != NULL) |
18236 | xfree (copied_name); | |
c6da4cef DE |
18237 | |
18238 | if (file_is_pst) | |
18239 | return NULL; | |
18240 | return include_name; | |
18241 | } | |
18242 | ||
d9b3de22 DE |
18243 | /* State machine to track the state of the line number program. */ |
18244 | ||
6f77053d | 18245 | class lnp_state_machine |
d9b3de22 | 18246 | { |
6f77053d PA |
18247 | public: |
18248 | /* Initialize a machine state for the start of a line number | |
18249 | program. */ | |
18250 | lnp_state_machine (gdbarch *arch, line_header *lh, bool record_lines_p); | |
18251 | ||
8c43009f PA |
18252 | file_entry *current_file () |
18253 | { | |
18254 | /* lh->file_names is 0-based, but the file name numbers in the | |
18255 | statement program are 1-based. */ | |
6f77053d PA |
18256 | return m_line_header->file_name_at (m_file); |
18257 | } | |
18258 | ||
18259 | /* Record the line in the state machine. END_SEQUENCE is true if | |
18260 | we're processing the end of a sequence. */ | |
18261 | void record_line (bool end_sequence); | |
18262 | ||
18263 | /* Check address and if invalid nop-out the rest of the lines in this | |
18264 | sequence. */ | |
18265 | void check_line_address (struct dwarf2_cu *cu, | |
18266 | const gdb_byte *line_ptr, | |
18267 | CORE_ADDR lowpc, CORE_ADDR address); | |
18268 | ||
18269 | void handle_set_discriminator (unsigned int discriminator) | |
18270 | { | |
18271 | m_discriminator = discriminator; | |
18272 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
18273 | } | |
18274 | ||
18275 | /* Handle DW_LNE_set_address. */ | |
18276 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
18277 | { | |
18278 | m_op_index = 0; | |
18279 | address += baseaddr; | |
18280 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
18281 | } | |
18282 | ||
18283 | /* Handle DW_LNS_advance_pc. */ | |
18284 | void handle_advance_pc (CORE_ADDR adjust); | |
18285 | ||
18286 | /* Handle a special opcode. */ | |
18287 | void handle_special_opcode (unsigned char op_code); | |
18288 | ||
18289 | /* Handle DW_LNS_advance_line. */ | |
18290 | void handle_advance_line (int line_delta) | |
18291 | { | |
18292 | advance_line (line_delta); | |
18293 | } | |
18294 | ||
18295 | /* Handle DW_LNS_set_file. */ | |
18296 | void handle_set_file (file_name_index file); | |
18297 | ||
18298 | /* Handle DW_LNS_negate_stmt. */ | |
18299 | void handle_negate_stmt () | |
18300 | { | |
18301 | m_is_stmt = !m_is_stmt; | |
18302 | } | |
18303 | ||
18304 | /* Handle DW_LNS_const_add_pc. */ | |
18305 | void handle_const_add_pc (); | |
18306 | ||
18307 | /* Handle DW_LNS_fixed_advance_pc. */ | |
18308 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
18309 | { | |
18310 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18311 | m_op_index = 0; | |
18312 | } | |
18313 | ||
18314 | /* Handle DW_LNS_copy. */ | |
18315 | void handle_copy () | |
18316 | { | |
18317 | record_line (false); | |
18318 | m_discriminator = 0; | |
18319 | } | |
18320 | ||
18321 | /* Handle DW_LNE_end_sequence. */ | |
18322 | void handle_end_sequence () | |
18323 | { | |
18324 | m_record_line_callback = ::record_line; | |
18325 | } | |
18326 | ||
18327 | private: | |
18328 | /* Advance the line by LINE_DELTA. */ | |
18329 | void advance_line (int line_delta) | |
18330 | { | |
18331 | m_line += line_delta; | |
18332 | ||
18333 | if (line_delta != 0) | |
18334 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
18335 | } |
18336 | ||
6f77053d PA |
18337 | gdbarch *m_gdbarch; |
18338 | ||
18339 | /* True if we're recording lines. | |
18340 | Otherwise we're building partial symtabs and are just interested in | |
18341 | finding include files mentioned by the line number program. */ | |
18342 | bool m_record_lines_p; | |
18343 | ||
8c43009f | 18344 | /* The line number header. */ |
6f77053d | 18345 | line_header *m_line_header; |
8c43009f | 18346 | |
6f77053d PA |
18347 | /* These are part of the standard DWARF line number state machine, |
18348 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 18349 | |
6f77053d | 18350 | unsigned char m_op_index = 0; |
8c43009f | 18351 | /* The line table index (1-based) of the current file. */ |
6f77053d PA |
18352 | file_name_index m_file = (file_name_index) 1; |
18353 | unsigned int m_line = 1; | |
18354 | ||
18355 | /* These are initialized in the constructor. */ | |
18356 | ||
18357 | CORE_ADDR m_address; | |
18358 | bool m_is_stmt; | |
18359 | unsigned int m_discriminator; | |
d9b3de22 DE |
18360 | |
18361 | /* Additional bits of state we need to track. */ | |
18362 | ||
18363 | /* The last file that we called dwarf2_start_subfile for. | |
18364 | This is only used for TLLs. */ | |
6f77053d | 18365 | unsigned int m_last_file = 0; |
d9b3de22 | 18366 | /* The last file a line number was recorded for. */ |
6f77053d | 18367 | struct subfile *m_last_subfile = NULL; |
d9b3de22 DE |
18368 | |
18369 | /* The function to call to record a line. */ | |
6f77053d | 18370 | record_line_ftype *m_record_line_callback = NULL; |
d9b3de22 DE |
18371 | |
18372 | /* The last line number that was recorded, used to coalesce | |
18373 | consecutive entries for the same line. This can happen, for | |
18374 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
18375 | unsigned int m_last_line = 0; |
18376 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 18377 | }; |
d9b3de22 | 18378 | |
6f77053d PA |
18379 | void |
18380 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
18381 | { | |
18382 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
18383 | / m_line_header->maximum_ops_per_instruction) | |
18384 | * m_line_header->minimum_instruction_length); | |
18385 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18386 | m_op_index = ((m_op_index + adjust) | |
18387 | % m_line_header->maximum_ops_per_instruction); | |
18388 | } | |
d9b3de22 | 18389 | |
6f77053d PA |
18390 | void |
18391 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 18392 | { |
6f77053d PA |
18393 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
18394 | CORE_ADDR addr_adj = (((m_op_index | |
18395 | + (adj_opcode / m_line_header->line_range)) | |
18396 | / m_line_header->maximum_ops_per_instruction) | |
18397 | * m_line_header->minimum_instruction_length); | |
18398 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18399 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
18400 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 18401 | |
6f77053d PA |
18402 | int line_delta = (m_line_header->line_base |
18403 | + (adj_opcode % m_line_header->line_range)); | |
18404 | advance_line (line_delta); | |
18405 | record_line (false); | |
18406 | m_discriminator = 0; | |
18407 | } | |
d9b3de22 | 18408 | |
6f77053d PA |
18409 | void |
18410 | lnp_state_machine::handle_set_file (file_name_index file) | |
18411 | { | |
18412 | m_file = file; | |
18413 | ||
18414 | const file_entry *fe = current_file (); | |
18415 | if (fe == NULL) | |
18416 | dwarf2_debug_line_missing_file_complaint (); | |
18417 | else if (m_record_lines_p) | |
18418 | { | |
18419 | const char *dir = fe->include_dir (m_line_header); | |
18420 | ||
18421 | m_last_subfile = current_subfile; | |
18422 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
18423 | dwarf2_start_subfile (fe->name, dir); | |
18424 | } | |
18425 | } | |
18426 | ||
18427 | void | |
18428 | lnp_state_machine::handle_const_add_pc () | |
18429 | { | |
18430 | CORE_ADDR adjust | |
18431 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
18432 | ||
18433 | CORE_ADDR addr_adj | |
18434 | = (((m_op_index + adjust) | |
18435 | / m_line_header->maximum_ops_per_instruction) | |
18436 | * m_line_header->minimum_instruction_length); | |
18437 | ||
18438 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
18439 | m_op_index = ((m_op_index + adjust) | |
18440 | % m_line_header->maximum_ops_per_instruction); | |
18441 | } | |
d9b3de22 | 18442 | |
c91513d8 PP |
18443 | /* Ignore this record_line request. */ |
18444 | ||
18445 | static void | |
18446 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
18447 | { | |
18448 | return; | |
18449 | } | |
18450 | ||
a05a36a5 DE |
18451 | /* Return non-zero if we should add LINE to the line number table. |
18452 | LINE is the line to add, LAST_LINE is the last line that was added, | |
18453 | LAST_SUBFILE is the subfile for LAST_LINE. | |
18454 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
18455 | had a non-zero discriminator. | |
18456 | ||
18457 | We have to be careful in the presence of discriminators. | |
18458 | E.g., for this line: | |
18459 | ||
18460 | for (i = 0; i < 100000; i++); | |
18461 | ||
18462 | clang can emit four line number entries for that one line, | |
18463 | each with a different discriminator. | |
18464 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
18465 | ||
18466 | However, we want gdb to coalesce all four entries into one. | |
18467 | Otherwise the user could stepi into the middle of the line and | |
18468 | gdb would get confused about whether the pc really was in the | |
18469 | middle of the line. | |
18470 | ||
18471 | Things are further complicated by the fact that two consecutive | |
18472 | line number entries for the same line is a heuristic used by gcc | |
18473 | to denote the end of the prologue. So we can't just discard duplicate | |
18474 | entries, we have to be selective about it. The heuristic we use is | |
18475 | that we only collapse consecutive entries for the same line if at least | |
18476 | one of those entries has a non-zero discriminator. PR 17276. | |
18477 | ||
18478 | Note: Addresses in the line number state machine can never go backwards | |
18479 | within one sequence, thus this coalescing is ok. */ | |
18480 | ||
18481 | static int | |
18482 | dwarf_record_line_p (unsigned int line, unsigned int last_line, | |
18483 | int line_has_non_zero_discriminator, | |
18484 | struct subfile *last_subfile) | |
18485 | { | |
18486 | if (current_subfile != last_subfile) | |
18487 | return 1; | |
18488 | if (line != last_line) | |
18489 | return 1; | |
18490 | /* Same line for the same file that we've seen already. | |
18491 | As a last check, for pr 17276, only record the line if the line | |
18492 | has never had a non-zero discriminator. */ | |
18493 | if (!line_has_non_zero_discriminator) | |
18494 | return 1; | |
18495 | return 0; | |
18496 | } | |
18497 | ||
252a6764 DE |
18498 | /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS |
18499 | in the line table of subfile SUBFILE. */ | |
18500 | ||
18501 | static void | |
d9b3de22 DE |
18502 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
18503 | unsigned int line, CORE_ADDR address, | |
18504 | record_line_ftype p_record_line) | |
252a6764 DE |
18505 | { |
18506 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
18507 | ||
27e0867f DE |
18508 | if (dwarf_line_debug) |
18509 | { | |
18510 | fprintf_unfiltered (gdb_stdlog, | |
18511 | "Recording line %u, file %s, address %s\n", | |
18512 | line, lbasename (subfile->name), | |
18513 | paddress (gdbarch, address)); | |
18514 | } | |
18515 | ||
d5962de5 | 18516 | (*p_record_line) (subfile, line, addr); |
252a6764 DE |
18517 | } |
18518 | ||
18519 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
18520 | Mark the end of a set of line number records. | |
d9b3de22 | 18521 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
18522 | If SUBFILE is NULL the request is ignored. */ |
18523 | ||
18524 | static void | |
18525 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
18526 | CORE_ADDR address, record_line_ftype p_record_line) | |
18527 | { | |
27e0867f DE |
18528 | if (subfile == NULL) |
18529 | return; | |
18530 | ||
18531 | if (dwarf_line_debug) | |
18532 | { | |
18533 | fprintf_unfiltered (gdb_stdlog, | |
18534 | "Finishing current line, file %s, address %s\n", | |
18535 | lbasename (subfile->name), | |
18536 | paddress (gdbarch, address)); | |
18537 | } | |
18538 | ||
d9b3de22 DE |
18539 | dwarf_record_line_1 (gdbarch, subfile, 0, address, p_record_line); |
18540 | } | |
18541 | ||
6f77053d PA |
18542 | void |
18543 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 18544 | { |
d9b3de22 DE |
18545 | if (dwarf_line_debug) |
18546 | { | |
18547 | fprintf_unfiltered (gdb_stdlog, | |
18548 | "Processing actual line %u: file %u," | |
18549 | " address %s, is_stmt %u, discrim %u\n", | |
6f77053d PA |
18550 | m_line, to_underlying (m_file), |
18551 | paddress (m_gdbarch, m_address), | |
18552 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
18553 | } |
18554 | ||
6f77053d | 18555 | file_entry *fe = current_file (); |
8c43009f PA |
18556 | |
18557 | if (fe == NULL) | |
d9b3de22 DE |
18558 | dwarf2_debug_line_missing_file_complaint (); |
18559 | /* For now we ignore lines not starting on an instruction boundary. | |
18560 | But not when processing end_sequence for compatibility with the | |
18561 | previous version of the code. */ | |
6f77053d | 18562 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 18563 | { |
8c43009f | 18564 | fe->included_p = 1; |
6f77053d | 18565 | if (m_record_lines_p && m_is_stmt) |
d9b3de22 | 18566 | { |
6f77053d | 18567 | if (m_last_subfile != current_subfile || end_sequence) |
d9b3de22 | 18568 | { |
6f77053d PA |
18569 | dwarf_finish_line (m_gdbarch, m_last_subfile, |
18570 | m_address, m_record_line_callback); | |
d9b3de22 DE |
18571 | } |
18572 | ||
18573 | if (!end_sequence) | |
18574 | { | |
6f77053d PA |
18575 | if (dwarf_record_line_p (m_line, m_last_line, |
18576 | m_line_has_non_zero_discriminator, | |
18577 | m_last_subfile)) | |
d9b3de22 | 18578 | { |
6f77053d PA |
18579 | dwarf_record_line_1 (m_gdbarch, current_subfile, |
18580 | m_line, m_address, | |
18581 | m_record_line_callback); | |
d9b3de22 | 18582 | } |
6f77053d PA |
18583 | m_last_subfile = current_subfile; |
18584 | m_last_line = m_line; | |
d9b3de22 DE |
18585 | } |
18586 | } | |
18587 | } | |
18588 | } | |
18589 | ||
6f77053d PA |
18590 | lnp_state_machine::lnp_state_machine (gdbarch *arch, line_header *lh, |
18591 | bool record_lines_p) | |
d9b3de22 | 18592 | { |
6f77053d PA |
18593 | m_gdbarch = arch; |
18594 | m_record_lines_p = record_lines_p; | |
18595 | m_line_header = lh; | |
d9b3de22 | 18596 | |
6f77053d | 18597 | m_record_line_callback = ::record_line; |
d9b3de22 | 18598 | |
d9b3de22 DE |
18599 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
18600 | was a line entry for it so that the backend has a chance to adjust it | |
18601 | and also record it in case it needs it. This is currently used by MIPS | |
18602 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
18603 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
18604 | m_is_stmt = lh->default_is_stmt; | |
18605 | m_discriminator = 0; | |
252a6764 DE |
18606 | } |
18607 | ||
6f77053d PA |
18608 | void |
18609 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
18610 | const gdb_byte *line_ptr, | |
18611 | CORE_ADDR lowpc, CORE_ADDR address) | |
924c2928 DE |
18612 | { |
18613 | /* If address < lowpc then it's not a usable value, it's outside the | |
18614 | pc range of the CU. However, we restrict the test to only address | |
18615 | values of zero to preserve GDB's previous behaviour which is to | |
18616 | handle the specific case of a function being GC'd by the linker. */ | |
18617 | ||
18618 | if (address == 0 && address < lowpc) | |
18619 | { | |
18620 | /* This line table is for a function which has been | |
18621 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
18622 | ||
18623 | struct objfile *objfile = cu->objfile; | |
18624 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; | |
18625 | ||
18626 | complaint (&symfile_complaints, | |
18627 | _(".debug_line address at offset 0x%lx is 0 [in module %s]"), | |
18628 | line_offset, objfile_name (objfile)); | |
6f77053d PA |
18629 | m_record_line_callback = noop_record_line; |
18630 | /* Note: record_line_callback is left as noop_record_line until | |
18631 | we see DW_LNE_end_sequence. */ | |
924c2928 DE |
18632 | } |
18633 | } | |
18634 | ||
f3f5162e | 18635 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
18636 | Process the line number information in LH. |
18637 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
18638 | program in order to set included_p for every referenced header. */ | |
debd256d | 18639 | |
c906108c | 18640 | static void |
43f3e411 DE |
18641 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
18642 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 18643 | { |
d521ce57 TT |
18644 | const gdb_byte *line_ptr, *extended_end; |
18645 | const gdb_byte *line_end; | |
a8c50c1f | 18646 | unsigned int bytes_read, extended_len; |
699ca60a | 18647 | unsigned char op_code, extended_op; |
e142c38c DJ |
18648 | CORE_ADDR baseaddr; |
18649 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 18650 | bfd *abfd = objfile->obfd; |
fbf65064 | 18651 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
18652 | /* True if we're recording line info (as opposed to building partial |
18653 | symtabs and just interested in finding include files mentioned by | |
18654 | the line number program). */ | |
18655 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c DJ |
18656 | |
18657 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 18658 | |
debd256d JB |
18659 | line_ptr = lh->statement_program_start; |
18660 | line_end = lh->statement_program_end; | |
c906108c SS |
18661 | |
18662 | /* Read the statement sequences until there's nothing left. */ | |
18663 | while (line_ptr < line_end) | |
18664 | { | |
6f77053d PA |
18665 | /* The DWARF line number program state machine. Reset the state |
18666 | machine at the start of each sequence. */ | |
18667 | lnp_state_machine state_machine (gdbarch, lh, record_lines_p); | |
18668 | bool end_sequence = false; | |
d9b3de22 | 18669 | |
8c43009f | 18670 | if (record_lines_p) |
c906108c | 18671 | { |
8c43009f PA |
18672 | /* Start a subfile for the current file of the state |
18673 | machine. */ | |
18674 | const file_entry *fe = state_machine.current_file (); | |
18675 | ||
18676 | if (fe != NULL) | |
18677 | dwarf2_start_subfile (fe->name, fe->include_dir (lh)); | |
c906108c SS |
18678 | } |
18679 | ||
a738430d | 18680 | /* Decode the table. */ |
d9b3de22 | 18681 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
18682 | { |
18683 | op_code = read_1_byte (abfd, line_ptr); | |
18684 | line_ptr += 1; | |
9aa1fe7e | 18685 | |
debd256d | 18686 | if (op_code >= lh->opcode_base) |
6e70227d | 18687 | { |
8e07a239 | 18688 | /* Special opcode. */ |
6f77053d | 18689 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
18690 | } |
18691 | else switch (op_code) | |
c906108c SS |
18692 | { |
18693 | case DW_LNS_extended_op: | |
3e43a32a MS |
18694 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
18695 | &bytes_read); | |
473b7be6 | 18696 | line_ptr += bytes_read; |
a8c50c1f | 18697 | extended_end = line_ptr + extended_len; |
c906108c SS |
18698 | extended_op = read_1_byte (abfd, line_ptr); |
18699 | line_ptr += 1; | |
18700 | switch (extended_op) | |
18701 | { | |
18702 | case DW_LNE_end_sequence: | |
6f77053d PA |
18703 | state_machine.handle_end_sequence (); |
18704 | end_sequence = true; | |
c906108c SS |
18705 | break; |
18706 | case DW_LNE_set_address: | |
d9b3de22 DE |
18707 | { |
18708 | CORE_ADDR address | |
18709 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 18710 | line_ptr += bytes_read; |
6f77053d PA |
18711 | |
18712 | state_machine.check_line_address (cu, line_ptr, | |
18713 | lowpc, address); | |
18714 | state_machine.handle_set_address (baseaddr, address); | |
d9b3de22 | 18715 | } |
c906108c SS |
18716 | break; |
18717 | case DW_LNE_define_file: | |
debd256d | 18718 | { |
d521ce57 | 18719 | const char *cur_file; |
ecfb656c PA |
18720 | unsigned int mod_time, length; |
18721 | dir_index dindex; | |
6e70227d | 18722 | |
3e43a32a MS |
18723 | cur_file = read_direct_string (abfd, line_ptr, |
18724 | &bytes_read); | |
debd256d | 18725 | line_ptr += bytes_read; |
ecfb656c | 18726 | dindex = (dir_index) |
debd256d JB |
18727 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
18728 | line_ptr += bytes_read; | |
18729 | mod_time = | |
18730 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18731 | line_ptr += bytes_read; | |
18732 | length = | |
18733 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18734 | line_ptr += bytes_read; | |
ecfb656c | 18735 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 18736 | } |
c906108c | 18737 | break; |
d0c6ba3d | 18738 | case DW_LNE_set_discriminator: |
6f77053d PA |
18739 | { |
18740 | /* The discriminator is not interesting to the | |
18741 | debugger; just ignore it. We still need to | |
18742 | check its value though: | |
18743 | if there are consecutive entries for the same | |
18744 | (non-prologue) line we want to coalesce them. | |
18745 | PR 17276. */ | |
18746 | unsigned int discr | |
18747 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18748 | line_ptr += bytes_read; | |
18749 | ||
18750 | state_machine.handle_set_discriminator (discr); | |
18751 | } | |
d0c6ba3d | 18752 | break; |
c906108c | 18753 | default: |
4d3c2250 | 18754 | complaint (&symfile_complaints, |
e2e0b3e5 | 18755 | _("mangled .debug_line section")); |
debd256d | 18756 | return; |
c906108c | 18757 | } |
a8c50c1f DJ |
18758 | /* Make sure that we parsed the extended op correctly. If e.g. |
18759 | we expected a different address size than the producer used, | |
18760 | we may have read the wrong number of bytes. */ | |
18761 | if (line_ptr != extended_end) | |
18762 | { | |
18763 | complaint (&symfile_complaints, | |
18764 | _("mangled .debug_line section")); | |
18765 | return; | |
18766 | } | |
c906108c SS |
18767 | break; |
18768 | case DW_LNS_copy: | |
6f77053d | 18769 | state_machine.handle_copy (); |
c906108c SS |
18770 | break; |
18771 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
18772 | { |
18773 | CORE_ADDR adjust | |
18774 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 18775 | line_ptr += bytes_read; |
6f77053d PA |
18776 | |
18777 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 18778 | } |
c906108c SS |
18779 | break; |
18780 | case DW_LNS_advance_line: | |
a05a36a5 DE |
18781 | { |
18782 | int line_delta | |
18783 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 18784 | line_ptr += bytes_read; |
6f77053d PA |
18785 | |
18786 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 18787 | } |
c906108c SS |
18788 | break; |
18789 | case DW_LNS_set_file: | |
d9b3de22 | 18790 | { |
6f77053d | 18791 | file_name_index file |
ecfb656c PA |
18792 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
18793 | &bytes_read); | |
d9b3de22 | 18794 | line_ptr += bytes_read; |
8c43009f | 18795 | |
6f77053d | 18796 | state_machine.handle_set_file (file); |
d9b3de22 | 18797 | } |
c906108c SS |
18798 | break; |
18799 | case DW_LNS_set_column: | |
0ad93d4f | 18800 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
18801 | line_ptr += bytes_read; |
18802 | break; | |
18803 | case DW_LNS_negate_stmt: | |
6f77053d | 18804 | state_machine.handle_negate_stmt (); |
c906108c SS |
18805 | break; |
18806 | case DW_LNS_set_basic_block: | |
c906108c | 18807 | break; |
c2c6d25f JM |
18808 | /* Add to the address register of the state machine the |
18809 | address increment value corresponding to special opcode | |
a738430d MK |
18810 | 255. I.e., this value is scaled by the minimum |
18811 | instruction length since special opcode 255 would have | |
b021a221 | 18812 | scaled the increment. */ |
c906108c | 18813 | case DW_LNS_const_add_pc: |
6f77053d | 18814 | state_machine.handle_const_add_pc (); |
c906108c SS |
18815 | break; |
18816 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 18817 | { |
6f77053d | 18818 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 18819 | line_ptr += 2; |
6f77053d PA |
18820 | |
18821 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 18822 | } |
c906108c | 18823 | break; |
9aa1fe7e | 18824 | default: |
a738430d MK |
18825 | { |
18826 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 18827 | int i; |
a738430d | 18828 | |
debd256d | 18829 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
18830 | { |
18831 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
18832 | line_ptr += bytes_read; | |
18833 | } | |
18834 | } | |
c906108c SS |
18835 | } |
18836 | } | |
d9b3de22 DE |
18837 | |
18838 | if (!end_sequence) | |
18839 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
18840 | ||
18841 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
18842 | in which case we still finish recording the last line). */ | |
6f77053d | 18843 | state_machine.record_line (true); |
c906108c | 18844 | } |
f3f5162e DE |
18845 | } |
18846 | ||
18847 | /* Decode the Line Number Program (LNP) for the given line_header | |
18848 | structure and CU. The actual information extracted and the type | |
18849 | of structures created from the LNP depends on the value of PST. | |
18850 | ||
18851 | 1. If PST is NULL, then this procedure uses the data from the program | |
18852 | to create all necessary symbol tables, and their linetables. | |
18853 | ||
18854 | 2. If PST is not NULL, this procedure reads the program to determine | |
18855 | the list of files included by the unit represented by PST, and | |
18856 | builds all the associated partial symbol tables. | |
18857 | ||
18858 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
18859 | It is used for relative paths in the line table. | |
18860 | NOTE: When processing partial symtabs (pst != NULL), | |
18861 | comp_dir == pst->dirname. | |
18862 | ||
18863 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
18864 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
18865 | symtab we don't use it in the name of the psymtabs we create. | |
18866 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
18867 | A good testcase for this is mb-inline.exp. |
18868 | ||
527f3840 JK |
18869 | LOWPC is the lowest address in CU (or 0 if not known). |
18870 | ||
18871 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
18872 | for its PC<->lines mapping information. Otherwise only the filename | |
18873 | table is read in. */ | |
f3f5162e DE |
18874 | |
18875 | static void | |
18876 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 18877 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 18878 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e DE |
18879 | { |
18880 | struct objfile *objfile = cu->objfile; | |
18881 | const int decode_for_pst_p = (pst != NULL); | |
f3f5162e | 18882 | |
527f3840 JK |
18883 | if (decode_mapping) |
18884 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
18885 | |
18886 | if (decode_for_pst_p) | |
18887 | { | |
18888 | int file_index; | |
18889 | ||
18890 | /* Now that we're done scanning the Line Header Program, we can | |
18891 | create the psymtab of each included file. */ | |
fff8551c | 18892 | for (file_index = 0; file_index < lh->file_names.size (); file_index++) |
aaa75496 JB |
18893 | if (lh->file_names[file_index].included_p == 1) |
18894 | { | |
d521ce57 | 18895 | const char *include_name = |
c6da4cef DE |
18896 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
18897 | if (include_name != NULL) | |
aaa75496 JB |
18898 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
18899 | } | |
18900 | } | |
cb1df416 DJ |
18901 | else |
18902 | { | |
18903 | /* Make sure a symtab is created for every file, even files | |
18904 | which contain only variables (i.e. no code with associated | |
18905 | line numbers). */ | |
43f3e411 | 18906 | struct compunit_symtab *cust = buildsym_compunit_symtab (); |
cb1df416 | 18907 | int i; |
cb1df416 | 18908 | |
fff8551c | 18909 | for (i = 0; i < lh->file_names.size (); i++) |
cb1df416 | 18910 | { |
8c43009f | 18911 | file_entry &fe = lh->file_names[i]; |
9a619af0 | 18912 | |
8c43009f | 18913 | dwarf2_start_subfile (fe.name, fe.include_dir (lh)); |
cb1df416 | 18914 | |
cb1df416 | 18915 | if (current_subfile->symtab == NULL) |
43f3e411 DE |
18916 | { |
18917 | current_subfile->symtab | |
18918 | = allocate_symtab (cust, current_subfile->name); | |
18919 | } | |
8c43009f | 18920 | fe.symtab = current_subfile->symtab; |
cb1df416 DJ |
18921 | } |
18922 | } | |
c906108c SS |
18923 | } |
18924 | ||
18925 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
18926 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 18927 | or NULL if not known. |
c906108c SS |
18928 | This routine tries to keep line numbers from identical absolute and |
18929 | relative file names in a common subfile. | |
18930 | ||
18931 | Using the `list' example from the GDB testsuite, which resides in | |
18932 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
18933 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
18934 | ||
c5aa993b | 18935 | DW_AT_name: /srcdir/list0.c |
4d663531 | 18936 | DW_AT_comp_dir: /compdir |
357e46e7 | 18937 | files.files[0].name: list0.h |
c5aa993b | 18938 | files.files[0].dir: /srcdir |
357e46e7 | 18939 | files.files[1].name: list0.c |
c5aa993b | 18940 | files.files[1].dir: /srcdir |
c906108c SS |
18941 | |
18942 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
18943 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
18944 | start_subfile will ensure that this happens provided that we pass the | |
18945 | concatenation of files.files[1].dir and files.files[1].name as the | |
18946 | subfile's name. */ | |
c906108c SS |
18947 | |
18948 | static void | |
4d663531 | 18949 | dwarf2_start_subfile (const char *filename, const char *dirname) |
c906108c | 18950 | { |
d521ce57 | 18951 | char *copy = NULL; |
4f1520fb | 18952 | |
4d663531 | 18953 | /* In order not to lose the line information directory, |
4f1520fb FR |
18954 | we concatenate it to the filename when it makes sense. |
18955 | Note that the Dwarf3 standard says (speaking of filenames in line | |
18956 | information): ``The directory index is ignored for file names | |
18957 | that represent full path names''. Thus ignoring dirname in the | |
18958 | `else' branch below isn't an issue. */ | |
c906108c | 18959 | |
d5166ae1 | 18960 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
18961 | { |
18962 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
18963 | filename = copy; | |
18964 | } | |
c906108c | 18965 | |
4d663531 | 18966 | start_subfile (filename); |
4f1520fb | 18967 | |
d521ce57 TT |
18968 | if (copy != NULL) |
18969 | xfree (copy); | |
c906108c SS |
18970 | } |
18971 | ||
f4dc4d17 DE |
18972 | /* Start a symtab for DWARF. |
18973 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
18974 | ||
43f3e411 | 18975 | static struct compunit_symtab * |
f4dc4d17 | 18976 | dwarf2_start_symtab (struct dwarf2_cu *cu, |
15d034d0 | 18977 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 | 18978 | { |
43f3e411 DE |
18979 | struct compunit_symtab *cust |
18980 | = start_symtab (cu->objfile, name, comp_dir, low_pc); | |
18981 | ||
f4dc4d17 DE |
18982 | record_debugformat ("DWARF 2"); |
18983 | record_producer (cu->producer); | |
18984 | ||
18985 | /* We assume that we're processing GCC output. */ | |
18986 | processing_gcc_compilation = 2; | |
18987 | ||
4d4ec4e5 | 18988 | cu->processing_has_namespace_info = 0; |
43f3e411 DE |
18989 | |
18990 | return cust; | |
f4dc4d17 DE |
18991 | } |
18992 | ||
4c2df51b DJ |
18993 | static void |
18994 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18995 | struct dwarf2_cu *cu) |
4c2df51b | 18996 | { |
e7c27a73 DJ |
18997 | struct objfile *objfile = cu->objfile; |
18998 | struct comp_unit_head *cu_header = &cu->header; | |
18999 | ||
4c2df51b DJ |
19000 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
19001 | code here to turn a symbol with DW_AT_external and a | |
19002 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
19003 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
19004 | with some versions of binutils) where shared libraries could have | |
19005 | relocations against symbols in their debug information - the | |
19006 | minimal symbol would have the right address, but the debug info | |
19007 | would not. It's no longer necessary, because we will explicitly | |
19008 | apply relocations when we read in the debug information now. */ | |
19009 | ||
19010 | /* A DW_AT_location attribute with no contents indicates that a | |
19011 | variable has been optimized away. */ | |
19012 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
19013 | { | |
f1e6e072 | 19014 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
19015 | return; |
19016 | } | |
19017 | ||
19018 | /* Handle one degenerate form of location expression specially, to | |
19019 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
19020 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
19021 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
19022 | |
19023 | if (attr_form_is_block (attr) | |
3019eac3 DE |
19024 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
19025 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
19026 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
19027 | && (DW_BLOCK (attr)->size | |
19028 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 19029 | { |
891d2f0b | 19030 | unsigned int dummy; |
4c2df51b | 19031 | |
3019eac3 DE |
19032 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
19033 | SYMBOL_VALUE_ADDRESS (sym) = | |
19034 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
19035 | else | |
19036 | SYMBOL_VALUE_ADDRESS (sym) = | |
19037 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 19038 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
19039 | fixup_symbol_section (sym, objfile); |
19040 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
19041 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
19042 | return; |
19043 | } | |
19044 | ||
19045 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
19046 | expression evaluator, and use LOC_COMPUTED only when necessary | |
19047 | (i.e. when the value of a register or memory location is | |
19048 | referenced, or a thread-local block, etc.). Then again, it might | |
19049 | not be worthwhile. I'm assuming that it isn't unless performance | |
19050 | or memory numbers show me otherwise. */ | |
19051 | ||
f1e6e072 | 19052 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 19053 | |
f1e6e072 | 19054 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 19055 | cu->has_loclist = 1; |
4c2df51b DJ |
19056 | } |
19057 | ||
c906108c SS |
19058 | /* Given a pointer to a DWARF information entry, figure out if we need |
19059 | to make a symbol table entry for it, and if so, create a new entry | |
19060 | and return a pointer to it. | |
19061 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
19062 | used the passed type. |
19063 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
19064 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
19065 | |
19066 | static struct symbol * | |
34eaf542 TT |
19067 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
19068 | struct symbol *space) | |
c906108c | 19069 | { |
e7c27a73 | 19070 | struct objfile *objfile = cu->objfile; |
3e29f34a | 19071 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 19072 | struct symbol *sym = NULL; |
15d034d0 | 19073 | const char *name; |
c906108c SS |
19074 | struct attribute *attr = NULL; |
19075 | struct attribute *attr2 = NULL; | |
e142c38c | 19076 | CORE_ADDR baseaddr; |
e37fd15a SW |
19077 | struct pending **list_to_add = NULL; |
19078 | ||
edb3359d | 19079 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
19080 | |
19081 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 19082 | |
94af9270 | 19083 | name = dwarf2_name (die, cu); |
c906108c SS |
19084 | if (name) |
19085 | { | |
94af9270 | 19086 | const char *linkagename; |
34eaf542 | 19087 | int suppress_add = 0; |
94af9270 | 19088 | |
34eaf542 TT |
19089 | if (space) |
19090 | sym = space; | |
19091 | else | |
e623cf5d | 19092 | sym = allocate_symbol (objfile); |
c906108c | 19093 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
19094 | |
19095 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 19096 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
19097 | linkagename = dwarf2_physname (name, die, cu); |
19098 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 19099 | |
f55ee35c JK |
19100 | /* Fortran does not have mangling standard and the mangling does differ |
19101 | between gfortran, iFort etc. */ | |
19102 | if (cu->language == language_fortran | |
b250c185 | 19103 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 19104 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 19105 | dwarf2_full_name (name, die, cu), |
29df156d | 19106 | NULL); |
f55ee35c | 19107 | |
c906108c | 19108 | /* Default assumptions. |
c5aa993b | 19109 | Use the passed type or decode it from the die. */ |
176620f1 | 19110 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 19111 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
19112 | if (type != NULL) |
19113 | SYMBOL_TYPE (sym) = type; | |
19114 | else | |
e7c27a73 | 19115 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
19116 | attr = dwarf2_attr (die, |
19117 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
19118 | cu); | |
c906108c SS |
19119 | if (attr) |
19120 | { | |
19121 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
19122 | } | |
cb1df416 | 19123 | |
edb3359d DJ |
19124 | attr = dwarf2_attr (die, |
19125 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
19126 | cu); | |
cb1df416 DJ |
19127 | if (attr) |
19128 | { | |
ecfb656c | 19129 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 19130 | struct file_entry *fe; |
9a619af0 | 19131 | |
ecfb656c PA |
19132 | if (cu->line_header != NULL) |
19133 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
19134 | else |
19135 | fe = NULL; | |
19136 | ||
19137 | if (fe == NULL) | |
cb1df416 DJ |
19138 | complaint (&symfile_complaints, |
19139 | _("file index out of range")); | |
8c43009f PA |
19140 | else |
19141 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
19142 | } |
19143 | ||
c906108c SS |
19144 | switch (die->tag) |
19145 | { | |
19146 | case DW_TAG_label: | |
e142c38c | 19147 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c | 19148 | if (attr) |
3e29f34a MR |
19149 | { |
19150 | CORE_ADDR addr; | |
19151 | ||
19152 | addr = attr_value_as_address (attr); | |
19153 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
19154 | SYMBOL_VALUE_ADDRESS (sym) = addr; | |
19155 | } | |
0f5238ed TT |
19156 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
19157 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 19158 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 19159 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
19160 | break; |
19161 | case DW_TAG_subprogram: | |
19162 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19163 | finish_block. */ | |
f1e6e072 | 19164 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 19165 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
19166 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
19167 | || cu->language == language_ada) | |
c906108c | 19168 | { |
2cfa0c8d JB |
19169 | /* Subprograms marked external are stored as a global symbol. |
19170 | Ada subprograms, whether marked external or not, are always | |
19171 | stored as a global symbol, because we want to be able to | |
19172 | access them globally. For instance, we want to be able | |
19173 | to break on a nested subprogram without having to | |
19174 | specify the context. */ | |
e37fd15a | 19175 | list_to_add = &global_symbols; |
c906108c SS |
19176 | } |
19177 | else | |
19178 | { | |
e37fd15a | 19179 | list_to_add = cu->list_in_scope; |
c906108c SS |
19180 | } |
19181 | break; | |
edb3359d DJ |
19182 | case DW_TAG_inlined_subroutine: |
19183 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
19184 | finish_block. */ | |
f1e6e072 | 19185 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 19186 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 19187 | list_to_add = cu->list_in_scope; |
edb3359d | 19188 | break; |
34eaf542 TT |
19189 | case DW_TAG_template_value_param: |
19190 | suppress_add = 1; | |
19191 | /* Fall through. */ | |
72929c62 | 19192 | case DW_TAG_constant: |
c906108c | 19193 | case DW_TAG_variable: |
254e6b9e | 19194 | case DW_TAG_member: |
0963b4bd MS |
19195 | /* Compilation with minimal debug info may result in |
19196 | variables with missing type entries. Change the | |
19197 | misleading `void' type to something sensible. */ | |
c906108c | 19198 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 19199 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 19200 | |
e142c38c | 19201 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
19202 | /* In the case of DW_TAG_member, we should only be called for |
19203 | static const members. */ | |
19204 | if (die->tag == DW_TAG_member) | |
19205 | { | |
3863f96c DE |
19206 | /* dwarf2_add_field uses die_is_declaration, |
19207 | so we do the same. */ | |
254e6b9e DE |
19208 | gdb_assert (die_is_declaration (die, cu)); |
19209 | gdb_assert (attr); | |
19210 | } | |
c906108c SS |
19211 | if (attr) |
19212 | { | |
e7c27a73 | 19213 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 19214 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 19215 | if (!suppress_add) |
34eaf542 TT |
19216 | { |
19217 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 19218 | list_to_add = &global_symbols; |
34eaf542 | 19219 | else |
e37fd15a | 19220 | list_to_add = cu->list_in_scope; |
34eaf542 | 19221 | } |
c906108c SS |
19222 | break; |
19223 | } | |
e142c38c | 19224 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19225 | if (attr) |
19226 | { | |
e7c27a73 | 19227 | var_decode_location (attr, sym, cu); |
e142c38c | 19228 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
19229 | |
19230 | /* Fortran explicitly imports any global symbols to the local | |
19231 | scope by DW_TAG_common_block. */ | |
19232 | if (cu->language == language_fortran && die->parent | |
19233 | && die->parent->tag == DW_TAG_common_block) | |
19234 | attr2 = NULL; | |
19235 | ||
caac4577 JG |
19236 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
19237 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
19238 | && !dwarf2_per_objfile->has_section_at_zero) | |
19239 | { | |
19240 | /* When a static variable is eliminated by the linker, | |
19241 | the corresponding debug information is not stripped | |
19242 | out, but the variable address is set to null; | |
19243 | do not add such variables into symbol table. */ | |
19244 | } | |
19245 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 19246 | { |
f55ee35c JK |
19247 | /* Workaround gfortran PR debug/40040 - it uses |
19248 | DW_AT_location for variables in -fPIC libraries which may | |
19249 | get overriden by other libraries/executable and get | |
19250 | a different address. Resolve it by the minimal symbol | |
19251 | which may come from inferior's executable using copy | |
19252 | relocation. Make this workaround only for gfortran as for | |
19253 | other compilers GDB cannot guess the minimal symbol | |
19254 | Fortran mangling kind. */ | |
19255 | if (cu->language == language_fortran && die->parent | |
19256 | && die->parent->tag == DW_TAG_module | |
19257 | && cu->producer | |
28586665 | 19258 | && startswith (cu->producer, "GNU Fortran")) |
f1e6e072 | 19259 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 19260 | |
1c809c68 TT |
19261 | /* A variable with DW_AT_external is never static, |
19262 | but it may be block-scoped. */ | |
19263 | list_to_add = (cu->list_in_scope == &file_symbols | |
19264 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 19265 | } |
c906108c | 19266 | else |
e37fd15a | 19267 | list_to_add = cu->list_in_scope; |
c906108c SS |
19268 | } |
19269 | else | |
19270 | { | |
19271 | /* We do not know the address of this symbol. | |
c5aa993b JM |
19272 | If it is an external symbol and we have type information |
19273 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
19274 | The address of the variable will then be determined from | |
19275 | the minimal symbol table whenever the variable is | |
19276 | referenced. */ | |
e142c38c | 19277 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
19278 | |
19279 | /* Fortran explicitly imports any global symbols to the local | |
19280 | scope by DW_TAG_common_block. */ | |
19281 | if (cu->language == language_fortran && die->parent | |
19282 | && die->parent->tag == DW_TAG_common_block) | |
19283 | { | |
19284 | /* SYMBOL_CLASS doesn't matter here because | |
19285 | read_common_block is going to reset it. */ | |
19286 | if (!suppress_add) | |
19287 | list_to_add = cu->list_in_scope; | |
19288 | } | |
19289 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
19290 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 19291 | { |
0fe7935b DJ |
19292 | /* A variable with DW_AT_external is never static, but it |
19293 | may be block-scoped. */ | |
19294 | list_to_add = (cu->list_in_scope == &file_symbols | |
19295 | ? &global_symbols : cu->list_in_scope); | |
19296 | ||
f1e6e072 | 19297 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 19298 | } |
442ddf59 JK |
19299 | else if (!die_is_declaration (die, cu)) |
19300 | { | |
19301 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
19302 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
19303 | if (!suppress_add) |
19304 | list_to_add = cu->list_in_scope; | |
442ddf59 | 19305 | } |
c906108c SS |
19306 | } |
19307 | break; | |
19308 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
19309 | /* If we are inside a function, mark this as an argument. If |
19310 | not, we might be looking at an argument to an inlined function | |
19311 | when we do not have enough information to show inlined frames; | |
19312 | pretend it's a local variable in that case so that the user can | |
19313 | still see it. */ | |
19314 | if (context_stack_depth > 0 | |
19315 | && context_stack[context_stack_depth - 1].name != NULL) | |
19316 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 19317 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
19318 | if (attr) |
19319 | { | |
e7c27a73 | 19320 | var_decode_location (attr, sym, cu); |
c906108c | 19321 | } |
e142c38c | 19322 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19323 | if (attr) |
19324 | { | |
e7c27a73 | 19325 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19326 | } |
f346a30d | 19327 | |
e37fd15a | 19328 | list_to_add = cu->list_in_scope; |
c906108c SS |
19329 | break; |
19330 | case DW_TAG_unspecified_parameters: | |
19331 | /* From varargs functions; gdb doesn't seem to have any | |
19332 | interest in this information, so just ignore it for now. | |
19333 | (FIXME?) */ | |
19334 | break; | |
34eaf542 TT |
19335 | case DW_TAG_template_type_param: |
19336 | suppress_add = 1; | |
19337 | /* Fall through. */ | |
c906108c | 19338 | case DW_TAG_class_type: |
680b30c7 | 19339 | case DW_TAG_interface_type: |
c906108c SS |
19340 | case DW_TAG_structure_type: |
19341 | case DW_TAG_union_type: | |
72019c9c | 19342 | case DW_TAG_set_type: |
c906108c | 19343 | case DW_TAG_enumeration_type: |
f1e6e072 | 19344 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19345 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 19346 | |
63d06c5c | 19347 | { |
9c37b5ae | 19348 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
19349 | really ever be static objects: otherwise, if you try |
19350 | to, say, break of a class's method and you're in a file | |
19351 | which doesn't mention that class, it won't work unless | |
19352 | the check for all static symbols in lookup_symbol_aux | |
19353 | saves you. See the OtherFileClass tests in | |
19354 | gdb.c++/namespace.exp. */ | |
19355 | ||
e37fd15a | 19356 | if (!suppress_add) |
34eaf542 | 19357 | { |
34eaf542 | 19358 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19359 | && cu->language == language_cplus |
34eaf542 | 19360 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19361 | |
64382290 | 19362 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 19363 | ... }" also defines a typedef for "foo". */ |
64382290 | 19364 | if (cu->language == language_cplus |
45280282 | 19365 | || cu->language == language_ada |
c44af4eb TT |
19366 | || cu->language == language_d |
19367 | || cu->language == language_rust) | |
64382290 TT |
19368 | { |
19369 | /* The symbol's name is already allocated along | |
19370 | with this objfile, so we don't need to | |
19371 | duplicate it for the type. */ | |
19372 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
19373 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
19374 | } | |
63d06c5c DC |
19375 | } |
19376 | } | |
c906108c SS |
19377 | break; |
19378 | case DW_TAG_typedef: | |
f1e6e072 | 19379 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 19380 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19381 | list_to_add = cu->list_in_scope; |
63d06c5c | 19382 | break; |
c906108c | 19383 | case DW_TAG_base_type: |
a02abb62 | 19384 | case DW_TAG_subrange_type: |
f1e6e072 | 19385 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 19386 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 19387 | list_to_add = cu->list_in_scope; |
c906108c SS |
19388 | break; |
19389 | case DW_TAG_enumerator: | |
e142c38c | 19390 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
19391 | if (attr) |
19392 | { | |
e7c27a73 | 19393 | dwarf2_const_value (attr, sym, cu); |
c906108c | 19394 | } |
63d06c5c DC |
19395 | { |
19396 | /* NOTE: carlton/2003-11-10: See comment above in the | |
19397 | DW_TAG_class_type, etc. block. */ | |
19398 | ||
e142c38c | 19399 | list_to_add = (cu->list_in_scope == &file_symbols |
9c37b5ae | 19400 | && cu->language == language_cplus |
e142c38c | 19401 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 19402 | } |
c906108c | 19403 | break; |
74921315 | 19404 | case DW_TAG_imported_declaration: |
5c4e30ca | 19405 | case DW_TAG_namespace: |
f1e6e072 | 19406 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 19407 | list_to_add = &global_symbols; |
5c4e30ca | 19408 | break; |
530e8392 KB |
19409 | case DW_TAG_module: |
19410 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
19411 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
19412 | list_to_add = &global_symbols; | |
19413 | break; | |
4357ac6c | 19414 | case DW_TAG_common_block: |
f1e6e072 | 19415 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
19416 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
19417 | add_symbol_to_list (sym, cu->list_in_scope); | |
19418 | break; | |
c906108c SS |
19419 | default: |
19420 | /* Not a tag we recognize. Hopefully we aren't processing | |
19421 | trash data, but since we must specifically ignore things | |
19422 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 19423 | this point. */ |
e2e0b3e5 | 19424 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 19425 | dwarf_tag_name (die->tag)); |
c906108c SS |
19426 | break; |
19427 | } | |
df8a16a1 | 19428 | |
e37fd15a SW |
19429 | if (suppress_add) |
19430 | { | |
19431 | sym->hash_next = objfile->template_symbols; | |
19432 | objfile->template_symbols = sym; | |
19433 | list_to_add = NULL; | |
19434 | } | |
19435 | ||
19436 | if (list_to_add != NULL) | |
19437 | add_symbol_to_list (sym, list_to_add); | |
19438 | ||
df8a16a1 DJ |
19439 | /* For the benefit of old versions of GCC, check for anonymous |
19440 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 19441 | if (!cu->processing_has_namespace_info |
94af9270 | 19442 | && cu->language == language_cplus) |
a10964d1 | 19443 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
19444 | } |
19445 | return (sym); | |
19446 | } | |
19447 | ||
34eaf542 TT |
19448 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
19449 | ||
19450 | static struct symbol * | |
19451 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
19452 | { | |
19453 | return new_symbol_full (die, type, cu, NULL); | |
19454 | } | |
19455 | ||
98bfdba5 PA |
19456 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
19457 | zero-extend it as appropriate for the symbol's type. The DWARF | |
19458 | standard (v4) is not entirely clear about the meaning of using | |
19459 | DW_FORM_dataN for a constant with a signed type, where the type is | |
19460 | wider than the data. The conclusion of a discussion on the DWARF | |
19461 | list was that this is unspecified. We choose to always zero-extend | |
19462 | because that is the interpretation long in use by GCC. */ | |
c906108c | 19463 | |
98bfdba5 | 19464 | static gdb_byte * |
ff39bb5e | 19465 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 19466 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 19467 | { |
e7c27a73 | 19468 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
19469 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
19470 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
19471 | LONGEST l = DW_UNSND (attr); |
19472 | ||
19473 | if (bits < sizeof (*value) * 8) | |
19474 | { | |
19475 | l &= ((LONGEST) 1 << bits) - 1; | |
19476 | *value = l; | |
19477 | } | |
19478 | else if (bits == sizeof (*value) * 8) | |
19479 | *value = l; | |
19480 | else | |
19481 | { | |
224c3ddb | 19482 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
19483 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
19484 | return bytes; | |
19485 | } | |
19486 | ||
19487 | return NULL; | |
19488 | } | |
19489 | ||
19490 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
19491 | the value does not fit in *VALUE, set *BYTES - either already | |
19492 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
19493 | or, set *BATON, if we translated the constant to a location | |
19494 | expression. */ | |
19495 | ||
19496 | static void | |
ff39bb5e | 19497 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
19498 | const char *name, struct obstack *obstack, |
19499 | struct dwarf2_cu *cu, | |
d521ce57 | 19500 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
19501 | struct dwarf2_locexpr_baton **baton) |
19502 | { | |
19503 | struct objfile *objfile = cu->objfile; | |
19504 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 19505 | struct dwarf_block *blk; |
98bfdba5 PA |
19506 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
19507 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
19508 | ||
19509 | *value = 0; | |
19510 | *bytes = NULL; | |
19511 | *baton = NULL; | |
c906108c SS |
19512 | |
19513 | switch (attr->form) | |
19514 | { | |
19515 | case DW_FORM_addr: | |
3019eac3 | 19516 | case DW_FORM_GNU_addr_index: |
ac56253d | 19517 | { |
ac56253d TT |
19518 | gdb_byte *data; |
19519 | ||
98bfdba5 PA |
19520 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
19521 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 19522 | cu_header->addr_size, |
98bfdba5 | 19523 | TYPE_LENGTH (type)); |
ac56253d TT |
19524 | /* Symbols of this form are reasonably rare, so we just |
19525 | piggyback on the existing location code rather than writing | |
19526 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 19527 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
19528 | (*baton)->per_cu = cu->per_cu; |
19529 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 19530 | |
98bfdba5 | 19531 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 19532 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 19533 | (*baton)->data = data; |
ac56253d TT |
19534 | |
19535 | data[0] = DW_OP_addr; | |
19536 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
19537 | byte_order, DW_ADDR (attr)); | |
19538 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 19539 | } |
c906108c | 19540 | break; |
4ac36638 | 19541 | case DW_FORM_string: |
93b5768b | 19542 | case DW_FORM_strp: |
3019eac3 | 19543 | case DW_FORM_GNU_str_index: |
36586728 | 19544 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
19545 | /* DW_STRING is already allocated on the objfile obstack, point |
19546 | directly to it. */ | |
d521ce57 | 19547 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 19548 | break; |
c906108c SS |
19549 | case DW_FORM_block1: |
19550 | case DW_FORM_block2: | |
19551 | case DW_FORM_block4: | |
19552 | case DW_FORM_block: | |
2dc7f7b3 | 19553 | case DW_FORM_exprloc: |
0224619f | 19554 | case DW_FORM_data16: |
c906108c | 19555 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
19556 | if (TYPE_LENGTH (type) != blk->size) |
19557 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
19558 | TYPE_LENGTH (type)); | |
19559 | *bytes = blk->data; | |
c906108c | 19560 | break; |
2df3850c JM |
19561 | |
19562 | /* The DW_AT_const_value attributes are supposed to carry the | |
19563 | symbol's value "represented as it would be on the target | |
19564 | architecture." By the time we get here, it's already been | |
19565 | converted to host endianness, so we just need to sign- or | |
19566 | zero-extend it as appropriate. */ | |
19567 | case DW_FORM_data1: | |
3aef2284 | 19568 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 19569 | break; |
c906108c | 19570 | case DW_FORM_data2: |
3aef2284 | 19571 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 19572 | break; |
c906108c | 19573 | case DW_FORM_data4: |
3aef2284 | 19574 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 19575 | break; |
c906108c | 19576 | case DW_FORM_data8: |
3aef2284 | 19577 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
19578 | break; |
19579 | ||
c906108c | 19580 | case DW_FORM_sdata: |
663c44ac | 19581 | case DW_FORM_implicit_const: |
98bfdba5 | 19582 | *value = DW_SND (attr); |
2df3850c JM |
19583 | break; |
19584 | ||
c906108c | 19585 | case DW_FORM_udata: |
98bfdba5 | 19586 | *value = DW_UNSND (attr); |
c906108c | 19587 | break; |
2df3850c | 19588 | |
c906108c | 19589 | default: |
4d3c2250 | 19590 | complaint (&symfile_complaints, |
e2e0b3e5 | 19591 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 19592 | dwarf_form_name (attr->form)); |
98bfdba5 | 19593 | *value = 0; |
c906108c SS |
19594 | break; |
19595 | } | |
19596 | } | |
19597 | ||
2df3850c | 19598 | |
98bfdba5 PA |
19599 | /* Copy constant value from an attribute to a symbol. */ |
19600 | ||
2df3850c | 19601 | static void |
ff39bb5e | 19602 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 19603 | struct dwarf2_cu *cu) |
2df3850c | 19604 | { |
98bfdba5 | 19605 | struct objfile *objfile = cu->objfile; |
12df843f | 19606 | LONGEST value; |
d521ce57 | 19607 | const gdb_byte *bytes; |
98bfdba5 | 19608 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 19609 | |
98bfdba5 PA |
19610 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
19611 | SYMBOL_PRINT_NAME (sym), | |
19612 | &objfile->objfile_obstack, cu, | |
19613 | &value, &bytes, &baton); | |
2df3850c | 19614 | |
98bfdba5 PA |
19615 | if (baton != NULL) |
19616 | { | |
98bfdba5 | 19617 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 19618 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
19619 | } |
19620 | else if (bytes != NULL) | |
19621 | { | |
19622 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 19623 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
19624 | } |
19625 | else | |
19626 | { | |
19627 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 19628 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 19629 | } |
2df3850c JM |
19630 | } |
19631 | ||
c906108c SS |
19632 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
19633 | ||
19634 | static struct type * | |
e7c27a73 | 19635 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19636 | { |
c906108c | 19637 | struct attribute *type_attr; |
c906108c | 19638 | |
e142c38c | 19639 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
19640 | if (!type_attr) |
19641 | { | |
19642 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 19643 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 19644 | } |
348e048f | 19645 | |
673bfd45 | 19646 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
19647 | } |
19648 | ||
b4ba55a1 JB |
19649 | /* True iff CU's producer generates GNAT Ada auxiliary information |
19650 | that allows to find parallel types through that information instead | |
19651 | of having to do expensive parallel lookups by type name. */ | |
19652 | ||
19653 | static int | |
19654 | need_gnat_info (struct dwarf2_cu *cu) | |
19655 | { | |
19656 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
19657 | of GNAT produces this auxiliary information, without any indication | |
19658 | that it is produced. Part of enhancing the FSF version of GNAT | |
19659 | to produce that information will be to put in place an indicator | |
19660 | that we can use in order to determine whether the descriptive type | |
19661 | info is available or not. One suggestion that has been made is | |
19662 | to use a new attribute, attached to the CU die. For now, assume | |
19663 | that the descriptive type info is not available. */ | |
19664 | return 0; | |
19665 | } | |
19666 | ||
b4ba55a1 JB |
19667 | /* Return the auxiliary type of the die in question using its |
19668 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
19669 | attribute is not present. */ | |
19670 | ||
19671 | static struct type * | |
19672 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
19673 | { | |
b4ba55a1 | 19674 | struct attribute *type_attr; |
b4ba55a1 JB |
19675 | |
19676 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
19677 | if (!type_attr) | |
19678 | return NULL; | |
19679 | ||
673bfd45 | 19680 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
19681 | } |
19682 | ||
19683 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
19684 | descriptive type accordingly. */ | |
19685 | ||
19686 | static void | |
19687 | set_descriptive_type (struct type *type, struct die_info *die, | |
19688 | struct dwarf2_cu *cu) | |
19689 | { | |
19690 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
19691 | ||
19692 | if (descriptive_type) | |
19693 | { | |
19694 | ALLOCATE_GNAT_AUX_TYPE (type); | |
19695 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
19696 | } | |
19697 | } | |
19698 | ||
c906108c SS |
19699 | /* Return the containing type of the die in question using its |
19700 | DW_AT_containing_type attribute. */ | |
19701 | ||
19702 | static struct type * | |
e7c27a73 | 19703 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19704 | { |
c906108c | 19705 | struct attribute *type_attr; |
c906108c | 19706 | |
e142c38c | 19707 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
19708 | if (!type_attr) |
19709 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 19710 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 19711 | |
673bfd45 | 19712 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
19713 | } |
19714 | ||
ac9ec31b DE |
19715 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
19716 | ||
19717 | static struct type * | |
19718 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
19719 | { | |
19720 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19721 | char *message, *saved; | |
19722 | ||
19723 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 19724 | objfile_name (objfile), |
9c541725 PA |
19725 | to_underlying (cu->header.sect_off), |
19726 | to_underlying (die->sect_off)); | |
224c3ddb SM |
19727 | saved = (char *) obstack_copy0 (&objfile->objfile_obstack, |
19728 | message, strlen (message)); | |
ac9ec31b DE |
19729 | xfree (message); |
19730 | ||
19f392bc | 19731 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
19732 | } |
19733 | ||
673bfd45 | 19734 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
19735 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
19736 | DW_AT_containing_type. | |
673bfd45 DE |
19737 | If there is no type substitute an error marker. */ |
19738 | ||
c906108c | 19739 | static struct type * |
ff39bb5e | 19740 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 19741 | struct dwarf2_cu *cu) |
c906108c | 19742 | { |
bb5ed363 | 19743 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
19744 | struct type *this_type; |
19745 | ||
ac9ec31b DE |
19746 | gdb_assert (attr->name == DW_AT_type |
19747 | || attr->name == DW_AT_GNAT_descriptive_type | |
19748 | || attr->name == DW_AT_containing_type); | |
19749 | ||
673bfd45 DE |
19750 | /* First see if we have it cached. */ |
19751 | ||
36586728 TT |
19752 | if (attr->form == DW_FORM_GNU_ref_alt) |
19753 | { | |
19754 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 19755 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 19756 | |
9c541725 PA |
19757 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, cu->objfile); |
19758 | this_type = get_die_type_at_offset (sect_off, per_cu); | |
36586728 | 19759 | } |
7771576e | 19760 | else if (attr_form_is_ref (attr)) |
673bfd45 | 19761 | { |
9c541725 | 19762 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 19763 | |
9c541725 | 19764 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 19765 | } |
55f1336d | 19766 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 19767 | { |
ac9ec31b | 19768 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 19769 | |
ac9ec31b | 19770 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
19771 | } |
19772 | else | |
19773 | { | |
ac9ec31b DE |
19774 | complaint (&symfile_complaints, |
19775 | _("Dwarf Error: Bad type attribute %s in DIE" | |
19776 | " at 0x%x [in module %s]"), | |
9c541725 | 19777 | dwarf_attr_name (attr->name), to_underlying (die->sect_off), |
4262abfb | 19778 | objfile_name (objfile)); |
ac9ec31b | 19779 | return build_error_marker_type (cu, die); |
673bfd45 DE |
19780 | } |
19781 | ||
19782 | /* If not cached we need to read it in. */ | |
19783 | ||
19784 | if (this_type == NULL) | |
19785 | { | |
ac9ec31b | 19786 | struct die_info *type_die = NULL; |
673bfd45 DE |
19787 | struct dwarf2_cu *type_cu = cu; |
19788 | ||
7771576e | 19789 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
19790 | type_die = follow_die_ref (die, attr, &type_cu); |
19791 | if (type_die == NULL) | |
19792 | return build_error_marker_type (cu, die); | |
19793 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
19794 | from an inter-CU reference and the type's CU got expanded before |
19795 | ours. */ | |
ac9ec31b | 19796 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
19797 | } |
19798 | ||
19799 | /* If we still don't have a type use an error marker. */ | |
19800 | ||
19801 | if (this_type == NULL) | |
ac9ec31b | 19802 | return build_error_marker_type (cu, die); |
673bfd45 | 19803 | |
f792889a | 19804 | return this_type; |
c906108c SS |
19805 | } |
19806 | ||
673bfd45 DE |
19807 | /* Return the type in DIE, CU. |
19808 | Returns NULL for invalid types. | |
19809 | ||
02142a6c | 19810 | This first does a lookup in die_type_hash, |
673bfd45 DE |
19811 | and only reads the die in if necessary. |
19812 | ||
19813 | NOTE: This can be called when reading in partial or full symbols. */ | |
19814 | ||
f792889a | 19815 | static struct type * |
e7c27a73 | 19816 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 19817 | { |
f792889a DJ |
19818 | struct type *this_type; |
19819 | ||
19820 | this_type = get_die_type (die, cu); | |
19821 | if (this_type) | |
19822 | return this_type; | |
19823 | ||
673bfd45 DE |
19824 | return read_type_die_1 (die, cu); |
19825 | } | |
19826 | ||
19827 | /* Read the type in DIE, CU. | |
19828 | Returns NULL for invalid types. */ | |
19829 | ||
19830 | static struct type * | |
19831 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
19832 | { | |
19833 | struct type *this_type = NULL; | |
19834 | ||
c906108c SS |
19835 | switch (die->tag) |
19836 | { | |
19837 | case DW_TAG_class_type: | |
680b30c7 | 19838 | case DW_TAG_interface_type: |
c906108c SS |
19839 | case DW_TAG_structure_type: |
19840 | case DW_TAG_union_type: | |
f792889a | 19841 | this_type = read_structure_type (die, cu); |
c906108c SS |
19842 | break; |
19843 | case DW_TAG_enumeration_type: | |
f792889a | 19844 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
19845 | break; |
19846 | case DW_TAG_subprogram: | |
19847 | case DW_TAG_subroutine_type: | |
edb3359d | 19848 | case DW_TAG_inlined_subroutine: |
f792889a | 19849 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
19850 | break; |
19851 | case DW_TAG_array_type: | |
f792889a | 19852 | this_type = read_array_type (die, cu); |
c906108c | 19853 | break; |
72019c9c | 19854 | case DW_TAG_set_type: |
f792889a | 19855 | this_type = read_set_type (die, cu); |
72019c9c | 19856 | break; |
c906108c | 19857 | case DW_TAG_pointer_type: |
f792889a | 19858 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
19859 | break; |
19860 | case DW_TAG_ptr_to_member_type: | |
f792889a | 19861 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
19862 | break; |
19863 | case DW_TAG_reference_type: | |
4297a3f0 AV |
19864 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
19865 | break; | |
19866 | case DW_TAG_rvalue_reference_type: | |
19867 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
19868 | break; |
19869 | case DW_TAG_const_type: | |
f792889a | 19870 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
19871 | break; |
19872 | case DW_TAG_volatile_type: | |
f792889a | 19873 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 19874 | break; |
06d66ee9 TT |
19875 | case DW_TAG_restrict_type: |
19876 | this_type = read_tag_restrict_type (die, cu); | |
19877 | break; | |
c906108c | 19878 | case DW_TAG_string_type: |
f792889a | 19879 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
19880 | break; |
19881 | case DW_TAG_typedef: | |
f792889a | 19882 | this_type = read_typedef (die, cu); |
c906108c | 19883 | break; |
a02abb62 | 19884 | case DW_TAG_subrange_type: |
f792889a | 19885 | this_type = read_subrange_type (die, cu); |
a02abb62 | 19886 | break; |
c906108c | 19887 | case DW_TAG_base_type: |
f792889a | 19888 | this_type = read_base_type (die, cu); |
c906108c | 19889 | break; |
81a17f79 | 19890 | case DW_TAG_unspecified_type: |
f792889a | 19891 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 19892 | break; |
0114d602 DJ |
19893 | case DW_TAG_namespace: |
19894 | this_type = read_namespace_type (die, cu); | |
19895 | break; | |
f55ee35c JK |
19896 | case DW_TAG_module: |
19897 | this_type = read_module_type (die, cu); | |
19898 | break; | |
a2c2acaf MW |
19899 | case DW_TAG_atomic_type: |
19900 | this_type = read_tag_atomic_type (die, cu); | |
19901 | break; | |
c906108c | 19902 | default: |
3e43a32a MS |
19903 | complaint (&symfile_complaints, |
19904 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 19905 | dwarf_tag_name (die->tag)); |
c906108c SS |
19906 | break; |
19907 | } | |
63d06c5c | 19908 | |
f792889a | 19909 | return this_type; |
63d06c5c DC |
19910 | } |
19911 | ||
abc72ce4 DE |
19912 | /* See if we can figure out if the class lives in a namespace. We do |
19913 | this by looking for a member function; its demangled name will | |
19914 | contain namespace info, if there is any. | |
19915 | Return the computed name or NULL. | |
19916 | Space for the result is allocated on the objfile's obstack. | |
19917 | This is the full-die version of guess_partial_die_structure_name. | |
19918 | In this case we know DIE has no useful parent. */ | |
19919 | ||
19920 | static char * | |
19921 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
19922 | { | |
19923 | struct die_info *spec_die; | |
19924 | struct dwarf2_cu *spec_cu; | |
19925 | struct die_info *child; | |
19926 | ||
19927 | spec_cu = cu; | |
19928 | spec_die = die_specification (die, &spec_cu); | |
19929 | if (spec_die != NULL) | |
19930 | { | |
19931 | die = spec_die; | |
19932 | cu = spec_cu; | |
19933 | } | |
19934 | ||
19935 | for (child = die->child; | |
19936 | child != NULL; | |
19937 | child = child->sibling) | |
19938 | { | |
19939 | if (child->tag == DW_TAG_subprogram) | |
19940 | { | |
73b9be8b | 19941 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 19942 | |
7d45c7c3 | 19943 | if (linkage_name != NULL) |
abc72ce4 DE |
19944 | { |
19945 | char *actual_name | |
19946 | = language_class_name_from_physname (cu->language_defn, | |
7d45c7c3 | 19947 | linkage_name); |
abc72ce4 DE |
19948 | char *name = NULL; |
19949 | ||
19950 | if (actual_name != NULL) | |
19951 | { | |
15d034d0 | 19952 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
19953 | |
19954 | if (die_name != NULL | |
19955 | && strcmp (die_name, actual_name) != 0) | |
19956 | { | |
19957 | /* Strip off the class name from the full name. | |
19958 | We want the prefix. */ | |
19959 | int die_name_len = strlen (die_name); | |
19960 | int actual_name_len = strlen (actual_name); | |
19961 | ||
19962 | /* Test for '::' as a sanity check. */ | |
19963 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
19964 | && actual_name[actual_name_len |
19965 | - die_name_len - 1] == ':') | |
224c3ddb SM |
19966 | name = (char *) obstack_copy0 ( |
19967 | &cu->objfile->per_bfd->storage_obstack, | |
19968 | actual_name, actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
19969 | } |
19970 | } | |
19971 | xfree (actual_name); | |
19972 | return name; | |
19973 | } | |
19974 | } | |
19975 | } | |
19976 | ||
19977 | return NULL; | |
19978 | } | |
19979 | ||
96408a79 SA |
19980 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
19981 | prefix part in such case. See | |
19982 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
19983 | ||
a121b7c1 | 19984 | static const char * |
96408a79 SA |
19985 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
19986 | { | |
19987 | struct attribute *attr; | |
e6a959d6 | 19988 | const char *base; |
96408a79 SA |
19989 | |
19990 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
19991 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
19992 | return NULL; | |
19993 | ||
7d45c7c3 | 19994 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
19995 | return NULL; |
19996 | ||
73b9be8b | 19997 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
19998 | if (attr == NULL || DW_STRING (attr) == NULL) |
19999 | return NULL; | |
20000 | ||
20001 | /* dwarf2_name had to be already called. */ | |
20002 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
20003 | ||
20004 | /* Strip the base name, keep any leading namespaces/classes. */ | |
20005 | base = strrchr (DW_STRING (attr), ':'); | |
20006 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
20007 | return ""; | |
20008 | ||
224c3ddb SM |
20009 | return (char *) obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, |
20010 | DW_STRING (attr), | |
20011 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
20012 | } |
20013 | ||
fdde2d81 | 20014 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 20015 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 20016 | |
0114d602 DJ |
20017 | For example, if we're within the method foo() in the following |
20018 | code: | |
20019 | ||
20020 | namespace N { | |
20021 | class C { | |
20022 | void foo () { | |
20023 | } | |
20024 | }; | |
20025 | } | |
20026 | ||
20027 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 20028 | |
0d5cff50 | 20029 | static const char * |
e142c38c | 20030 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 20031 | { |
0114d602 DJ |
20032 | struct die_info *parent, *spec_die; |
20033 | struct dwarf2_cu *spec_cu; | |
20034 | struct type *parent_type; | |
a121b7c1 | 20035 | const char *retval; |
63d06c5c | 20036 | |
9c37b5ae | 20037 | if (cu->language != language_cplus |
c44af4eb TT |
20038 | && cu->language != language_fortran && cu->language != language_d |
20039 | && cu->language != language_rust) | |
0114d602 DJ |
20040 | return ""; |
20041 | ||
96408a79 SA |
20042 | retval = anonymous_struct_prefix (die, cu); |
20043 | if (retval) | |
20044 | return retval; | |
20045 | ||
0114d602 DJ |
20046 | /* We have to be careful in the presence of DW_AT_specification. |
20047 | For example, with GCC 3.4, given the code | |
20048 | ||
20049 | namespace N { | |
20050 | void foo() { | |
20051 | // Definition of N::foo. | |
20052 | } | |
20053 | } | |
20054 | ||
20055 | then we'll have a tree of DIEs like this: | |
20056 | ||
20057 | 1: DW_TAG_compile_unit | |
20058 | 2: DW_TAG_namespace // N | |
20059 | 3: DW_TAG_subprogram // declaration of N::foo | |
20060 | 4: DW_TAG_subprogram // definition of N::foo | |
20061 | DW_AT_specification // refers to die #3 | |
20062 | ||
20063 | Thus, when processing die #4, we have to pretend that we're in | |
20064 | the context of its DW_AT_specification, namely the contex of die | |
20065 | #3. */ | |
20066 | spec_cu = cu; | |
20067 | spec_die = die_specification (die, &spec_cu); | |
20068 | if (spec_die == NULL) | |
20069 | parent = die->parent; | |
20070 | else | |
63d06c5c | 20071 | { |
0114d602 DJ |
20072 | parent = spec_die->parent; |
20073 | cu = spec_cu; | |
63d06c5c | 20074 | } |
0114d602 DJ |
20075 | |
20076 | if (parent == NULL) | |
20077 | return ""; | |
98bfdba5 PA |
20078 | else if (parent->building_fullname) |
20079 | { | |
20080 | const char *name; | |
20081 | const char *parent_name; | |
20082 | ||
20083 | /* It has been seen on RealView 2.2 built binaries, | |
20084 | DW_TAG_template_type_param types actually _defined_ as | |
20085 | children of the parent class: | |
20086 | ||
20087 | enum E {}; | |
20088 | template class <class Enum> Class{}; | |
20089 | Class<enum E> class_e; | |
20090 | ||
20091 | 1: DW_TAG_class_type (Class) | |
20092 | 2: DW_TAG_enumeration_type (E) | |
20093 | 3: DW_TAG_enumerator (enum1:0) | |
20094 | 3: DW_TAG_enumerator (enum2:1) | |
20095 | ... | |
20096 | 2: DW_TAG_template_type_param | |
20097 | DW_AT_type DW_FORM_ref_udata (E) | |
20098 | ||
20099 | Besides being broken debug info, it can put GDB into an | |
20100 | infinite loop. Consider: | |
20101 | ||
20102 | When we're building the full name for Class<E>, we'll start | |
20103 | at Class, and go look over its template type parameters, | |
20104 | finding E. We'll then try to build the full name of E, and | |
20105 | reach here. We're now trying to build the full name of E, | |
20106 | and look over the parent DIE for containing scope. In the | |
20107 | broken case, if we followed the parent DIE of E, we'd again | |
20108 | find Class, and once again go look at its template type | |
20109 | arguments, etc., etc. Simply don't consider such parent die | |
20110 | as source-level parent of this die (it can't be, the language | |
20111 | doesn't allow it), and break the loop here. */ | |
20112 | name = dwarf2_name (die, cu); | |
20113 | parent_name = dwarf2_name (parent, cu); | |
20114 | complaint (&symfile_complaints, | |
20115 | _("template param type '%s' defined within parent '%s'"), | |
20116 | name ? name : "<unknown>", | |
20117 | parent_name ? parent_name : "<unknown>"); | |
20118 | return ""; | |
20119 | } | |
63d06c5c | 20120 | else |
0114d602 DJ |
20121 | switch (parent->tag) |
20122 | { | |
63d06c5c | 20123 | case DW_TAG_namespace: |
0114d602 | 20124 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
20125 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
20126 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
20127 | Work around this problem here. */ | |
20128 | if (cu->language == language_cplus | |
20129 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
20130 | return ""; | |
0114d602 DJ |
20131 | /* We give a name to even anonymous namespaces. */ |
20132 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 20133 | case DW_TAG_class_type: |
680b30c7 | 20134 | case DW_TAG_interface_type: |
63d06c5c | 20135 | case DW_TAG_structure_type: |
0114d602 | 20136 | case DW_TAG_union_type: |
f55ee35c | 20137 | case DW_TAG_module: |
0114d602 DJ |
20138 | parent_type = read_type_die (parent, cu); |
20139 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20140 | return TYPE_TAG_NAME (parent_type); | |
20141 | else | |
20142 | /* An anonymous structure is only allowed non-static data | |
20143 | members; no typedefs, no member functions, et cetera. | |
20144 | So it does not need a prefix. */ | |
20145 | return ""; | |
abc72ce4 | 20146 | case DW_TAG_compile_unit: |
95554aad | 20147 | case DW_TAG_partial_unit: |
abc72ce4 DE |
20148 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
20149 | if (cu->language == language_cplus | |
8b70b953 | 20150 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
20151 | && die->child != NULL |
20152 | && (die->tag == DW_TAG_class_type | |
20153 | || die->tag == DW_TAG_structure_type | |
20154 | || die->tag == DW_TAG_union_type)) | |
20155 | { | |
20156 | char *name = guess_full_die_structure_name (die, cu); | |
20157 | if (name != NULL) | |
20158 | return name; | |
20159 | } | |
20160 | return ""; | |
3d567982 TT |
20161 | case DW_TAG_enumeration_type: |
20162 | parent_type = read_type_die (parent, cu); | |
20163 | if (TYPE_DECLARED_CLASS (parent_type)) | |
20164 | { | |
20165 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
20166 | return TYPE_TAG_NAME (parent_type); | |
20167 | return ""; | |
20168 | } | |
20169 | /* Fall through. */ | |
63d06c5c | 20170 | default: |
8176b9b8 | 20171 | return determine_prefix (parent, cu); |
63d06c5c | 20172 | } |
63d06c5c DC |
20173 | } |
20174 | ||
3e43a32a MS |
20175 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
20176 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
20177 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
20178 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
20179 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 20180 | |
f55ee35c | 20181 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
20182 | |
20183 | static char * | |
f55ee35c JK |
20184 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
20185 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 20186 | { |
f55ee35c | 20187 | const char *lead = ""; |
5c315b68 | 20188 | const char *sep; |
63d06c5c | 20189 | |
3e43a32a MS |
20190 | if (suffix == NULL || suffix[0] == '\0' |
20191 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 20192 | sep = ""; |
45280282 IB |
20193 | else if (cu->language == language_d) |
20194 | { | |
20195 | /* For D, the 'main' function could be defined in any module, but it | |
20196 | should never be prefixed. */ | |
20197 | if (strcmp (suffix, "D main") == 0) | |
20198 | { | |
20199 | prefix = ""; | |
20200 | sep = ""; | |
20201 | } | |
20202 | else | |
20203 | sep = "."; | |
20204 | } | |
f55ee35c JK |
20205 | else if (cu->language == language_fortran && physname) |
20206 | { | |
20207 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
20208 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
20209 | ||
20210 | lead = "__"; | |
20211 | sep = "_MOD_"; | |
20212 | } | |
987504bb JJ |
20213 | else |
20214 | sep = "::"; | |
63d06c5c | 20215 | |
6dd47d34 DE |
20216 | if (prefix == NULL) |
20217 | prefix = ""; | |
20218 | if (suffix == NULL) | |
20219 | suffix = ""; | |
20220 | ||
987504bb JJ |
20221 | if (obs == NULL) |
20222 | { | |
3e43a32a | 20223 | char *retval |
224c3ddb SM |
20224 | = ((char *) |
20225 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 20226 | |
f55ee35c JK |
20227 | strcpy (retval, lead); |
20228 | strcat (retval, prefix); | |
6dd47d34 DE |
20229 | strcat (retval, sep); |
20230 | strcat (retval, suffix); | |
63d06c5c DC |
20231 | return retval; |
20232 | } | |
987504bb JJ |
20233 | else |
20234 | { | |
20235 | /* We have an obstack. */ | |
f55ee35c | 20236 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 20237 | } |
63d06c5c DC |
20238 | } |
20239 | ||
c906108c SS |
20240 | /* Return sibling of die, NULL if no sibling. */ |
20241 | ||
f9aca02d | 20242 | static struct die_info * |
fba45db2 | 20243 | sibling_die (struct die_info *die) |
c906108c | 20244 | { |
639d11d3 | 20245 | return die->sibling; |
c906108c SS |
20246 | } |
20247 | ||
71c25dea TT |
20248 | /* Get name of a die, return NULL if not found. */ |
20249 | ||
15d034d0 TT |
20250 | static const char * |
20251 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
20252 | struct obstack *obstack) |
20253 | { | |
20254 | if (name && cu->language == language_cplus) | |
20255 | { | |
2f408ecb | 20256 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 20257 | |
2f408ecb | 20258 | if (!canon_name.empty ()) |
71c25dea | 20259 | { |
2f408ecb PA |
20260 | if (canon_name != name) |
20261 | name = (const char *) obstack_copy0 (obstack, | |
20262 | canon_name.c_str (), | |
20263 | canon_name.length ()); | |
71c25dea TT |
20264 | } |
20265 | } | |
20266 | ||
20267 | return name; | |
c906108c SS |
20268 | } |
20269 | ||
96553a0c DE |
20270 | /* Get name of a die, return NULL if not found. |
20271 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 20272 | |
15d034d0 | 20273 | static const char * |
e142c38c | 20274 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
20275 | { |
20276 | struct attribute *attr; | |
20277 | ||
e142c38c | 20278 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 20279 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 20280 | && die->tag != DW_TAG_namespace |
53832f31 TT |
20281 | && die->tag != DW_TAG_class_type |
20282 | && die->tag != DW_TAG_interface_type | |
20283 | && die->tag != DW_TAG_structure_type | |
20284 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
20285 | return NULL; |
20286 | ||
20287 | switch (die->tag) | |
20288 | { | |
20289 | case DW_TAG_compile_unit: | |
95554aad | 20290 | case DW_TAG_partial_unit: |
71c25dea TT |
20291 | /* Compilation units have a DW_AT_name that is a filename, not |
20292 | a source language identifier. */ | |
20293 | case DW_TAG_enumeration_type: | |
20294 | case DW_TAG_enumerator: | |
20295 | /* These tags always have simple identifiers already; no need | |
20296 | to canonicalize them. */ | |
20297 | return DW_STRING (attr); | |
907af001 | 20298 | |
96553a0c DE |
20299 | case DW_TAG_namespace: |
20300 | if (attr != NULL && DW_STRING (attr) != NULL) | |
20301 | return DW_STRING (attr); | |
20302 | return CP_ANONYMOUS_NAMESPACE_STR; | |
20303 | ||
907af001 UW |
20304 | case DW_TAG_class_type: |
20305 | case DW_TAG_interface_type: | |
20306 | case DW_TAG_structure_type: | |
20307 | case DW_TAG_union_type: | |
20308 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
20309 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
20310 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
20311 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 20312 | if (attr && DW_STRING (attr) |
61012eef GB |
20313 | && (startswith (DW_STRING (attr), "._") |
20314 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 20315 | return NULL; |
53832f31 TT |
20316 | |
20317 | /* GCC might emit a nameless typedef that has a linkage name. See | |
20318 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
20319 | if (!attr || DW_STRING (attr) == NULL) | |
20320 | { | |
df5c6c50 | 20321 | char *demangled = NULL; |
53832f31 | 20322 | |
73b9be8b | 20323 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
20324 | if (attr == NULL || DW_STRING (attr) == NULL) |
20325 | return NULL; | |
20326 | ||
df5c6c50 JK |
20327 | /* Avoid demangling DW_STRING (attr) the second time on a second |
20328 | call for the same DIE. */ | |
20329 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 20330 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
20331 | |
20332 | if (demangled) | |
20333 | { | |
e6a959d6 | 20334 | const char *base; |
96408a79 | 20335 | |
53832f31 | 20336 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 20337 | DW_STRING (attr) |
224c3ddb SM |
20338 | = ((const char *) |
20339 | obstack_copy0 (&cu->objfile->per_bfd->storage_obstack, | |
20340 | demangled, strlen (demangled))); | |
53832f31 TT |
20341 | DW_STRING_IS_CANONICAL (attr) = 1; |
20342 | xfree (demangled); | |
96408a79 SA |
20343 | |
20344 | /* Strip any leading namespaces/classes, keep only the base name. | |
20345 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
20346 | base = strrchr (DW_STRING (attr), ':'); | |
20347 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
20348 | return &base[1]; | |
20349 | else | |
20350 | return DW_STRING (attr); | |
53832f31 TT |
20351 | } |
20352 | } | |
907af001 UW |
20353 | break; |
20354 | ||
71c25dea | 20355 | default: |
907af001 UW |
20356 | break; |
20357 | } | |
20358 | ||
20359 | if (!DW_STRING_IS_CANONICAL (attr)) | |
20360 | { | |
20361 | DW_STRING (attr) | |
20362 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
34a68019 | 20363 | &cu->objfile->per_bfd->storage_obstack); |
907af001 | 20364 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 20365 | } |
907af001 | 20366 | return DW_STRING (attr); |
9219021c DC |
20367 | } |
20368 | ||
20369 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
20370 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
20371 | containing the return value on output. */ | |
9219021c DC |
20372 | |
20373 | static struct die_info * | |
f2f0e013 | 20374 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
20375 | { |
20376 | struct attribute *attr; | |
9219021c | 20377 | |
f2f0e013 | 20378 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
20379 | if (attr == NULL) |
20380 | return NULL; | |
20381 | ||
f2f0e013 | 20382 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
20383 | } |
20384 | ||
c906108c SS |
20385 | /* Convert a DIE tag into its string name. */ |
20386 | ||
f39c6ffd | 20387 | static const char * |
aa1ee363 | 20388 | dwarf_tag_name (unsigned tag) |
c906108c | 20389 | { |
f39c6ffd TT |
20390 | const char *name = get_DW_TAG_name (tag); |
20391 | ||
20392 | if (name == NULL) | |
20393 | return "DW_TAG_<unknown>"; | |
20394 | ||
20395 | return name; | |
c906108c SS |
20396 | } |
20397 | ||
20398 | /* Convert a DWARF attribute code into its string name. */ | |
20399 | ||
f39c6ffd | 20400 | static const char * |
aa1ee363 | 20401 | dwarf_attr_name (unsigned attr) |
c906108c | 20402 | { |
f39c6ffd TT |
20403 | const char *name; |
20404 | ||
c764a876 | 20405 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
20406 | if (attr == DW_AT_MIPS_fde) |
20407 | return "DW_AT_MIPS_fde"; | |
20408 | #else | |
20409 | if (attr == DW_AT_HP_block_index) | |
20410 | return "DW_AT_HP_block_index"; | |
c764a876 | 20411 | #endif |
f39c6ffd TT |
20412 | |
20413 | name = get_DW_AT_name (attr); | |
20414 | ||
20415 | if (name == NULL) | |
20416 | return "DW_AT_<unknown>"; | |
20417 | ||
20418 | return name; | |
c906108c SS |
20419 | } |
20420 | ||
20421 | /* Convert a DWARF value form code into its string name. */ | |
20422 | ||
f39c6ffd | 20423 | static const char * |
aa1ee363 | 20424 | dwarf_form_name (unsigned form) |
c906108c | 20425 | { |
f39c6ffd TT |
20426 | const char *name = get_DW_FORM_name (form); |
20427 | ||
20428 | if (name == NULL) | |
20429 | return "DW_FORM_<unknown>"; | |
20430 | ||
20431 | return name; | |
c906108c SS |
20432 | } |
20433 | ||
a121b7c1 | 20434 | static const char * |
fba45db2 | 20435 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
20436 | { |
20437 | if (mybool) | |
20438 | return "TRUE"; | |
20439 | else | |
20440 | return "FALSE"; | |
20441 | } | |
20442 | ||
20443 | /* Convert a DWARF type code into its string name. */ | |
20444 | ||
f39c6ffd | 20445 | static const char * |
aa1ee363 | 20446 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 20447 | { |
f39c6ffd | 20448 | const char *name = get_DW_ATE_name (enc); |
c906108c | 20449 | |
f39c6ffd TT |
20450 | if (name == NULL) |
20451 | return "DW_ATE_<unknown>"; | |
c906108c | 20452 | |
f39c6ffd | 20453 | return name; |
c906108c | 20454 | } |
c906108c | 20455 | |
f9aca02d | 20456 | static void |
d97bc12b | 20457 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
20458 | { |
20459 | unsigned int i; | |
20460 | ||
d97bc12b DE |
20461 | print_spaces (indent, f); |
20462 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
9c541725 PA |
20463 | dwarf_tag_name (die->tag), die->abbrev, |
20464 | to_underlying (die->sect_off)); | |
d97bc12b DE |
20465 | |
20466 | if (die->parent != NULL) | |
20467 | { | |
20468 | print_spaces (indent, f); | |
20469 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
9c541725 | 20470 | to_underlying (die->parent->sect_off)); |
d97bc12b DE |
20471 | } |
20472 | ||
20473 | print_spaces (indent, f); | |
20474 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 20475 | dwarf_bool_name (die->child != NULL)); |
c906108c | 20476 | |
d97bc12b DE |
20477 | print_spaces (indent, f); |
20478 | fprintf_unfiltered (f, " attributes:\n"); | |
20479 | ||
c906108c SS |
20480 | for (i = 0; i < die->num_attrs; ++i) |
20481 | { | |
d97bc12b DE |
20482 | print_spaces (indent, f); |
20483 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
20484 | dwarf_attr_name (die->attrs[i].name), |
20485 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 20486 | |
c906108c SS |
20487 | switch (die->attrs[i].form) |
20488 | { | |
c906108c | 20489 | case DW_FORM_addr: |
3019eac3 | 20490 | case DW_FORM_GNU_addr_index: |
d97bc12b | 20491 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 20492 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
20493 | break; |
20494 | case DW_FORM_block2: | |
20495 | case DW_FORM_block4: | |
20496 | case DW_FORM_block: | |
20497 | case DW_FORM_block1: | |
56eb65bd SP |
20498 | fprintf_unfiltered (f, "block: size %s", |
20499 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 20500 | break; |
2dc7f7b3 | 20501 | case DW_FORM_exprloc: |
56eb65bd SP |
20502 | fprintf_unfiltered (f, "expression: size %s", |
20503 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 20504 | break; |
0224619f JK |
20505 | case DW_FORM_data16: |
20506 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
20507 | break; | |
4568ecf9 DE |
20508 | case DW_FORM_ref_addr: |
20509 | fprintf_unfiltered (f, "ref address: "); | |
20510 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
20511 | break; | |
36586728 TT |
20512 | case DW_FORM_GNU_ref_alt: |
20513 | fprintf_unfiltered (f, "alt ref address: "); | |
20514 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
20515 | break; | |
10b3939b DJ |
20516 | case DW_FORM_ref1: |
20517 | case DW_FORM_ref2: | |
20518 | case DW_FORM_ref4: | |
4568ecf9 DE |
20519 | case DW_FORM_ref8: |
20520 | case DW_FORM_ref_udata: | |
d97bc12b | 20521 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 20522 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 20523 | break; |
c906108c SS |
20524 | case DW_FORM_data1: |
20525 | case DW_FORM_data2: | |
20526 | case DW_FORM_data4: | |
ce5d95e1 | 20527 | case DW_FORM_data8: |
c906108c SS |
20528 | case DW_FORM_udata: |
20529 | case DW_FORM_sdata: | |
43bbcdc2 PH |
20530 | fprintf_unfiltered (f, "constant: %s", |
20531 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 20532 | break; |
2dc7f7b3 TT |
20533 | case DW_FORM_sec_offset: |
20534 | fprintf_unfiltered (f, "section offset: %s", | |
20535 | pulongest (DW_UNSND (&die->attrs[i]))); | |
20536 | break; | |
55f1336d | 20537 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
20538 | fprintf_unfiltered (f, "signature: %s", |
20539 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 20540 | break; |
c906108c | 20541 | case DW_FORM_string: |
4bdf3d34 | 20542 | case DW_FORM_strp: |
43988095 | 20543 | case DW_FORM_line_strp: |
3019eac3 | 20544 | case DW_FORM_GNU_str_index: |
36586728 | 20545 | case DW_FORM_GNU_strp_alt: |
8285870a | 20546 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 20547 | DW_STRING (&die->attrs[i]) |
8285870a JK |
20548 | ? DW_STRING (&die->attrs[i]) : "", |
20549 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
20550 | break; |
20551 | case DW_FORM_flag: | |
20552 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 20553 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 20554 | else |
d97bc12b | 20555 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 20556 | break; |
2dc7f7b3 TT |
20557 | case DW_FORM_flag_present: |
20558 | fprintf_unfiltered (f, "flag: TRUE"); | |
20559 | break; | |
a8329558 | 20560 | case DW_FORM_indirect: |
0963b4bd MS |
20561 | /* The reader will have reduced the indirect form to |
20562 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
20563 | fprintf_unfiltered (f, |
20564 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 20565 | break; |
663c44ac JK |
20566 | case DW_FORM_implicit_const: |
20567 | fprintf_unfiltered (f, "constant: %s", | |
20568 | plongest (DW_SND (&die->attrs[i]))); | |
20569 | break; | |
c906108c | 20570 | default: |
d97bc12b | 20571 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 20572 | die->attrs[i].form); |
d97bc12b | 20573 | break; |
c906108c | 20574 | } |
d97bc12b | 20575 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
20576 | } |
20577 | } | |
20578 | ||
f9aca02d | 20579 | static void |
d97bc12b | 20580 | dump_die_for_error (struct die_info *die) |
c906108c | 20581 | { |
d97bc12b DE |
20582 | dump_die_shallow (gdb_stderr, 0, die); |
20583 | } | |
20584 | ||
20585 | static void | |
20586 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
20587 | { | |
20588 | int indent = level * 4; | |
20589 | ||
20590 | gdb_assert (die != NULL); | |
20591 | ||
20592 | if (level >= max_level) | |
20593 | return; | |
20594 | ||
20595 | dump_die_shallow (f, indent, die); | |
20596 | ||
20597 | if (die->child != NULL) | |
c906108c | 20598 | { |
d97bc12b DE |
20599 | print_spaces (indent, f); |
20600 | fprintf_unfiltered (f, " Children:"); | |
20601 | if (level + 1 < max_level) | |
20602 | { | |
20603 | fprintf_unfiltered (f, "\n"); | |
20604 | dump_die_1 (f, level + 1, max_level, die->child); | |
20605 | } | |
20606 | else | |
20607 | { | |
3e43a32a MS |
20608 | fprintf_unfiltered (f, |
20609 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
20610 | } |
20611 | } | |
20612 | ||
20613 | if (die->sibling != NULL && level > 0) | |
20614 | { | |
20615 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
20616 | } |
20617 | } | |
20618 | ||
d97bc12b DE |
20619 | /* This is called from the pdie macro in gdbinit.in. |
20620 | It's not static so gcc will keep a copy callable from gdb. */ | |
20621 | ||
20622 | void | |
20623 | dump_die (struct die_info *die, int max_level) | |
20624 | { | |
20625 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
20626 | } | |
20627 | ||
f9aca02d | 20628 | static void |
51545339 | 20629 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 20630 | { |
51545339 | 20631 | void **slot; |
c906108c | 20632 | |
9c541725 PA |
20633 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
20634 | to_underlying (die->sect_off), | |
b64f50a1 | 20635 | INSERT); |
51545339 DJ |
20636 | |
20637 | *slot = die; | |
c906108c SS |
20638 | } |
20639 | ||
b64f50a1 JK |
20640 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
20641 | required kind. */ | |
20642 | ||
20643 | static sect_offset | |
ff39bb5e | 20644 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 20645 | { |
7771576e | 20646 | if (attr_form_is_ref (attr)) |
9c541725 | 20647 | return (sect_offset) DW_UNSND (attr); |
93311388 DE |
20648 | |
20649 | complaint (&symfile_complaints, | |
20650 | _("unsupported die ref attribute form: '%s'"), | |
20651 | dwarf_form_name (attr->form)); | |
9c541725 | 20652 | return {}; |
c906108c SS |
20653 | } |
20654 | ||
43bbcdc2 PH |
20655 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
20656 | * the value held by the attribute is not constant. */ | |
a02abb62 | 20657 | |
43bbcdc2 | 20658 | static LONGEST |
ff39bb5e | 20659 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 20660 | { |
663c44ac | 20661 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
20662 | return DW_SND (attr); |
20663 | else if (attr->form == DW_FORM_udata | |
20664 | || attr->form == DW_FORM_data1 | |
20665 | || attr->form == DW_FORM_data2 | |
20666 | || attr->form == DW_FORM_data4 | |
20667 | || attr->form == DW_FORM_data8) | |
20668 | return DW_UNSND (attr); | |
20669 | else | |
20670 | { | |
0224619f | 20671 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
3e43a32a MS |
20672 | complaint (&symfile_complaints, |
20673 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
20674 | dwarf_form_name (attr->form)); |
20675 | return default_value; | |
20676 | } | |
20677 | } | |
20678 | ||
348e048f DE |
20679 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
20680 | On entry *REF_CU is the CU of SRC_DIE. | |
20681 | On exit *REF_CU is the CU of the result. */ | |
20682 | ||
20683 | static struct die_info * | |
ff39bb5e | 20684 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
20685 | struct dwarf2_cu **ref_cu) |
20686 | { | |
20687 | struct die_info *die; | |
20688 | ||
7771576e | 20689 | if (attr_form_is_ref (attr)) |
348e048f | 20690 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 20691 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
20692 | die = follow_die_sig (src_die, attr, ref_cu); |
20693 | else | |
20694 | { | |
20695 | dump_die_for_error (src_die); | |
20696 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 20697 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
20698 | } |
20699 | ||
20700 | return die; | |
03dd20cc DJ |
20701 | } |
20702 | ||
5c631832 | 20703 | /* Follow reference OFFSET. |
673bfd45 DE |
20704 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
20705 | On exit *REF_CU is the CU of the result. | |
20706 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 20707 | |
f9aca02d | 20708 | static struct die_info * |
9c541725 | 20709 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 20710 | struct dwarf2_cu **ref_cu) |
c906108c | 20711 | { |
10b3939b | 20712 | struct die_info temp_die; |
f2f0e013 | 20713 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 20714 | |
348e048f DE |
20715 | gdb_assert (cu->per_cu != NULL); |
20716 | ||
98bfdba5 PA |
20717 | target_cu = cu; |
20718 | ||
3019eac3 | 20719 | if (cu->per_cu->is_debug_types) |
348e048f DE |
20720 | { |
20721 | /* .debug_types CUs cannot reference anything outside their CU. | |
20722 | If they need to, they have to reference a signatured type via | |
55f1336d | 20723 | DW_FORM_ref_sig8. */ |
9c541725 | 20724 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 20725 | return NULL; |
348e048f | 20726 | } |
36586728 | 20727 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 20728 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
20729 | { |
20730 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 20731 | |
9c541725 | 20732 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
36586728 | 20733 | cu->objfile); |
03dd20cc DJ |
20734 | |
20735 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
20736 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
20737 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 20738 | |
10b3939b DJ |
20739 | target_cu = per_cu->cu; |
20740 | } | |
98bfdba5 PA |
20741 | else if (cu->dies == NULL) |
20742 | { | |
20743 | /* We're loading full DIEs during partial symbol reading. */ | |
20744 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 20745 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 20746 | } |
c906108c | 20747 | |
f2f0e013 | 20748 | *ref_cu = target_cu; |
9c541725 | 20749 | temp_die.sect_off = sect_off; |
9a3c8263 | 20750 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
20751 | &temp_die, |
20752 | to_underlying (sect_off)); | |
5c631832 | 20753 | } |
10b3939b | 20754 | |
5c631832 JK |
20755 | /* Follow reference attribute ATTR of SRC_DIE. |
20756 | On entry *REF_CU is the CU of SRC_DIE. | |
20757 | On exit *REF_CU is the CU of the result. */ | |
20758 | ||
20759 | static struct die_info * | |
ff39bb5e | 20760 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
20761 | struct dwarf2_cu **ref_cu) |
20762 | { | |
9c541725 | 20763 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
20764 | struct dwarf2_cu *cu = *ref_cu; |
20765 | struct die_info *die; | |
20766 | ||
9c541725 | 20767 | die = follow_die_offset (sect_off, |
36586728 TT |
20768 | (attr->form == DW_FORM_GNU_ref_alt |
20769 | || cu->per_cu->is_dwz), | |
20770 | ref_cu); | |
5c631832 JK |
20771 | if (!die) |
20772 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
20773 | "at 0x%x [in module %s]"), | |
9c541725 | 20774 | to_underlying (sect_off), to_underlying (src_die->sect_off), |
4262abfb | 20775 | objfile_name (cu->objfile)); |
348e048f | 20776 | |
5c631832 JK |
20777 | return die; |
20778 | } | |
20779 | ||
9c541725 | 20780 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b JK |
20781 | Returned value is intended for DW_OP_call*. Returned |
20782 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
20783 | |
20784 | struct dwarf2_locexpr_baton | |
9c541725 | 20785 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
20786 | struct dwarf2_per_cu_data *per_cu, |
20787 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20788 | void *baton) | |
5c631832 | 20789 | { |
918dd910 | 20790 | struct dwarf2_cu *cu; |
5c631832 JK |
20791 | struct die_info *die; |
20792 | struct attribute *attr; | |
20793 | struct dwarf2_locexpr_baton retval; | |
20794 | ||
8cf6f0b1 TT |
20795 | dw2_setup (per_cu->objfile); |
20796 | ||
918dd910 JK |
20797 | if (per_cu->cu == NULL) |
20798 | load_cu (per_cu); | |
20799 | cu = per_cu->cu; | |
cc12ce38 DE |
20800 | if (cu == NULL) |
20801 | { | |
20802 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20803 | Instead just throw an error, not much else we can do. */ | |
20804 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 20805 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 20806 | } |
918dd910 | 20807 | |
9c541725 | 20808 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 JK |
20809 | if (!die) |
20810 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 20811 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
20812 | |
20813 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
20814 | if (!attr) | |
20815 | { | |
e103e986 JK |
20816 | /* DWARF: "If there is no such attribute, then there is no effect.". |
20817 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 20818 | |
e103e986 | 20819 | retval.data = NULL; |
5c631832 JK |
20820 | retval.size = 0; |
20821 | } | |
8cf6f0b1 TT |
20822 | else if (attr_form_is_section_offset (attr)) |
20823 | { | |
20824 | struct dwarf2_loclist_baton loclist_baton; | |
20825 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
20826 | size_t size; | |
20827 | ||
20828 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
20829 | ||
20830 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
20831 | &size, pc); | |
20832 | retval.size = size; | |
20833 | } | |
5c631832 JK |
20834 | else |
20835 | { | |
20836 | if (!attr_form_is_block (attr)) | |
20837 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
20838 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
9c541725 | 20839 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
5c631832 JK |
20840 | |
20841 | retval.data = DW_BLOCK (attr)->data; | |
20842 | retval.size = DW_BLOCK (attr)->size; | |
20843 | } | |
20844 | retval.per_cu = cu->per_cu; | |
918dd910 | 20845 | |
918dd910 JK |
20846 | age_cached_comp_units (); |
20847 | ||
5c631832 | 20848 | return retval; |
348e048f DE |
20849 | } |
20850 | ||
8b9737bf TT |
20851 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
20852 | offset. */ | |
20853 | ||
20854 | struct dwarf2_locexpr_baton | |
20855 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
20856 | struct dwarf2_per_cu_data *per_cu, | |
20857 | CORE_ADDR (*get_frame_pc) (void *baton), | |
20858 | void *baton) | |
20859 | { | |
9c541725 | 20860 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 20861 | |
9c541725 | 20862 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
20863 | } |
20864 | ||
b6807d98 TT |
20865 | /* Write a constant of a given type as target-ordered bytes into |
20866 | OBSTACK. */ | |
20867 | ||
20868 | static const gdb_byte * | |
20869 | write_constant_as_bytes (struct obstack *obstack, | |
20870 | enum bfd_endian byte_order, | |
20871 | struct type *type, | |
20872 | ULONGEST value, | |
20873 | LONGEST *len) | |
20874 | { | |
20875 | gdb_byte *result; | |
20876 | ||
20877 | *len = TYPE_LENGTH (type); | |
224c3ddb | 20878 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20879 | store_unsigned_integer (result, *len, byte_order, value); |
20880 | ||
20881 | return result; | |
20882 | } | |
20883 | ||
20884 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
20885 | pointer to the constant bytes and set LEN to the length of the | |
20886 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
20887 | does not have a DW_AT_const_value, return NULL. */ | |
20888 | ||
20889 | const gdb_byte * | |
9c541725 | 20890 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
20891 | struct dwarf2_per_cu_data *per_cu, |
20892 | struct obstack *obstack, | |
20893 | LONGEST *len) | |
20894 | { | |
20895 | struct dwarf2_cu *cu; | |
20896 | struct die_info *die; | |
20897 | struct attribute *attr; | |
20898 | const gdb_byte *result = NULL; | |
20899 | struct type *type; | |
20900 | LONGEST value; | |
20901 | enum bfd_endian byte_order; | |
20902 | ||
20903 | dw2_setup (per_cu->objfile); | |
20904 | ||
20905 | if (per_cu->cu == NULL) | |
20906 | load_cu (per_cu); | |
20907 | cu = per_cu->cu; | |
cc12ce38 DE |
20908 | if (cu == NULL) |
20909 | { | |
20910 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
20911 | Instead just throw an error, not much else we can do. */ | |
20912 | error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"), | |
9c541725 | 20913 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
cc12ce38 | 20914 | } |
b6807d98 | 20915 | |
9c541725 | 20916 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 TT |
20917 | if (!die) |
20918 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
9c541725 | 20919 | to_underlying (sect_off), objfile_name (per_cu->objfile)); |
b6807d98 TT |
20920 | |
20921 | ||
20922 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
20923 | if (attr == NULL) | |
20924 | return NULL; | |
20925 | ||
20926 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
20927 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20928 | ||
20929 | switch (attr->form) | |
20930 | { | |
20931 | case DW_FORM_addr: | |
20932 | case DW_FORM_GNU_addr_index: | |
20933 | { | |
20934 | gdb_byte *tem; | |
20935 | ||
20936 | *len = cu->header.addr_size; | |
224c3ddb | 20937 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
20938 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
20939 | result = tem; | |
20940 | } | |
20941 | break; | |
20942 | case DW_FORM_string: | |
20943 | case DW_FORM_strp: | |
20944 | case DW_FORM_GNU_str_index: | |
20945 | case DW_FORM_GNU_strp_alt: | |
20946 | /* DW_STRING is already allocated on the objfile obstack, point | |
20947 | directly to it. */ | |
20948 | result = (const gdb_byte *) DW_STRING (attr); | |
20949 | *len = strlen (DW_STRING (attr)); | |
20950 | break; | |
20951 | case DW_FORM_block1: | |
20952 | case DW_FORM_block2: | |
20953 | case DW_FORM_block4: | |
20954 | case DW_FORM_block: | |
20955 | case DW_FORM_exprloc: | |
0224619f | 20956 | case DW_FORM_data16: |
b6807d98 TT |
20957 | result = DW_BLOCK (attr)->data; |
20958 | *len = DW_BLOCK (attr)->size; | |
20959 | break; | |
20960 | ||
20961 | /* The DW_AT_const_value attributes are supposed to carry the | |
20962 | symbol's value "represented as it would be on the target | |
20963 | architecture." By the time we get here, it's already been | |
20964 | converted to host endianness, so we just need to sign- or | |
20965 | zero-extend it as appropriate. */ | |
20966 | case DW_FORM_data1: | |
20967 | type = die_type (die, cu); | |
20968 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
20969 | if (result == NULL) | |
20970 | result = write_constant_as_bytes (obstack, byte_order, | |
20971 | type, value, len); | |
20972 | break; | |
20973 | case DW_FORM_data2: | |
20974 | type = die_type (die, cu); | |
20975 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
20976 | if (result == NULL) | |
20977 | result = write_constant_as_bytes (obstack, byte_order, | |
20978 | type, value, len); | |
20979 | break; | |
20980 | case DW_FORM_data4: | |
20981 | type = die_type (die, cu); | |
20982 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
20983 | if (result == NULL) | |
20984 | result = write_constant_as_bytes (obstack, byte_order, | |
20985 | type, value, len); | |
20986 | break; | |
20987 | case DW_FORM_data8: | |
20988 | type = die_type (die, cu); | |
20989 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
20990 | if (result == NULL) | |
20991 | result = write_constant_as_bytes (obstack, byte_order, | |
20992 | type, value, len); | |
20993 | break; | |
20994 | ||
20995 | case DW_FORM_sdata: | |
663c44ac | 20996 | case DW_FORM_implicit_const: |
b6807d98 TT |
20997 | type = die_type (die, cu); |
20998 | result = write_constant_as_bytes (obstack, byte_order, | |
20999 | type, DW_SND (attr), len); | |
21000 | break; | |
21001 | ||
21002 | case DW_FORM_udata: | |
21003 | type = die_type (die, cu); | |
21004 | result = write_constant_as_bytes (obstack, byte_order, | |
21005 | type, DW_UNSND (attr), len); | |
21006 | break; | |
21007 | ||
21008 | default: | |
21009 | complaint (&symfile_complaints, | |
21010 | _("unsupported const value attribute form: '%s'"), | |
21011 | dwarf_form_name (attr->form)); | |
21012 | break; | |
21013 | } | |
21014 | ||
21015 | return result; | |
21016 | } | |
21017 | ||
7942e96e AA |
21018 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
21019 | valid type for this die is found. */ | |
21020 | ||
21021 | struct type * | |
9c541725 | 21022 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
21023 | struct dwarf2_per_cu_data *per_cu) |
21024 | { | |
21025 | struct dwarf2_cu *cu; | |
21026 | struct die_info *die; | |
21027 | ||
21028 | dw2_setup (per_cu->objfile); | |
21029 | ||
21030 | if (per_cu->cu == NULL) | |
21031 | load_cu (per_cu); | |
21032 | cu = per_cu->cu; | |
21033 | if (!cu) | |
21034 | return NULL; | |
21035 | ||
9c541725 | 21036 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
21037 | if (!die) |
21038 | return NULL; | |
21039 | ||
21040 | return die_type (die, cu); | |
21041 | } | |
21042 | ||
8a9b8146 TT |
21043 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
21044 | PER_CU. */ | |
21045 | ||
21046 | struct type * | |
b64f50a1 | 21047 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
21048 | struct dwarf2_per_cu_data *per_cu) |
21049 | { | |
8a9b8146 | 21050 | dw2_setup (per_cu->objfile); |
b64f50a1 | 21051 | |
9c541725 | 21052 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 21053 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
21054 | } |
21055 | ||
ac9ec31b | 21056 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 21057 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
21058 | On exit *REF_CU is the CU of the result. |
21059 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
21060 | |
21061 | static struct die_info * | |
ac9ec31b DE |
21062 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
21063 | struct dwarf2_cu **ref_cu) | |
348e048f | 21064 | { |
348e048f | 21065 | struct die_info temp_die; |
348e048f DE |
21066 | struct dwarf2_cu *sig_cu; |
21067 | struct die_info *die; | |
21068 | ||
ac9ec31b DE |
21069 | /* While it might be nice to assert sig_type->type == NULL here, |
21070 | we can get here for DW_AT_imported_declaration where we need | |
21071 | the DIE not the type. */ | |
348e048f DE |
21072 | |
21073 | /* If necessary, add it to the queue and load its DIEs. */ | |
21074 | ||
95554aad | 21075 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 21076 | read_signatured_type (sig_type); |
348e048f | 21077 | |
348e048f | 21078 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 21079 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
21080 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
21081 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 21082 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 21083 | to_underlying (temp_die.sect_off)); |
348e048f DE |
21084 | if (die) |
21085 | { | |
796a7ff8 DE |
21086 | /* For .gdb_index version 7 keep track of included TUs. |
21087 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
21088 | if (dwarf2_per_objfile->index_table != NULL | |
21089 | && dwarf2_per_objfile->index_table->version <= 7) | |
21090 | { | |
21091 | VEC_safe_push (dwarf2_per_cu_ptr, | |
21092 | (*ref_cu)->per_cu->imported_symtabs, | |
21093 | sig_cu->per_cu); | |
21094 | } | |
21095 | ||
348e048f DE |
21096 | *ref_cu = sig_cu; |
21097 | return die; | |
21098 | } | |
21099 | ||
ac9ec31b DE |
21100 | return NULL; |
21101 | } | |
21102 | ||
21103 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
21104 | On entry *REF_CU is the CU of SRC_DIE. | |
21105 | On exit *REF_CU is the CU of the result. | |
21106 | The result is the DIE of the type. | |
21107 | If the referenced type cannot be found an error is thrown. */ | |
21108 | ||
21109 | static struct die_info * | |
ff39bb5e | 21110 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
21111 | struct dwarf2_cu **ref_cu) |
21112 | { | |
21113 | ULONGEST signature = DW_SIGNATURE (attr); | |
21114 | struct signatured_type *sig_type; | |
21115 | struct die_info *die; | |
21116 | ||
21117 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
21118 | ||
a2ce51a0 | 21119 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
21120 | /* sig_type will be NULL if the signatured type is missing from |
21121 | the debug info. */ | |
21122 | if (sig_type == NULL) | |
21123 | { | |
21124 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21125 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21126 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21127 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21128 | } |
21129 | ||
21130 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
21131 | if (die == NULL) | |
21132 | { | |
21133 | dump_die_for_error (src_die); | |
21134 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21135 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21136 | hex_string (signature), to_underlying (src_die->sect_off), |
4262abfb | 21137 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
21138 | } |
21139 | ||
21140 | return die; | |
21141 | } | |
21142 | ||
21143 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
21144 | reading in and processing the type unit if necessary. */ | |
21145 | ||
21146 | static struct type * | |
21147 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
21148 | struct dwarf2_cu *cu) | |
21149 | { | |
21150 | struct signatured_type *sig_type; | |
21151 | struct dwarf2_cu *type_cu; | |
21152 | struct die_info *type_die; | |
21153 | struct type *type; | |
21154 | ||
a2ce51a0 | 21155 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
21156 | /* sig_type will be NULL if the signatured type is missing from |
21157 | the debug info. */ | |
21158 | if (sig_type == NULL) | |
21159 | { | |
21160 | complaint (&symfile_complaints, | |
21161 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
21162 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21163 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21164 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21165 | return build_error_marker_type (cu, die); |
21166 | } | |
21167 | ||
21168 | /* If we already know the type we're done. */ | |
21169 | if (sig_type->type != NULL) | |
21170 | return sig_type->type; | |
21171 | ||
21172 | type_cu = cu; | |
21173 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
21174 | if (type_die != NULL) | |
21175 | { | |
21176 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
21177 | is created. This is important, for example, because for c++ classes | |
21178 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
21179 | type = read_type_die (type_die, type_cu); | |
21180 | if (type == NULL) | |
21181 | { | |
21182 | complaint (&symfile_complaints, | |
21183 | _("Dwarf Error: Cannot build signatured type %s" | |
21184 | " referenced from DIE at 0x%x [in module %s]"), | |
9c541725 | 21185 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21186 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21187 | type = build_error_marker_type (cu, die); |
21188 | } | |
21189 | } | |
21190 | else | |
21191 | { | |
21192 | complaint (&symfile_complaints, | |
21193 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
21194 | " from DIE at 0x%x [in module %s]"), | |
9c541725 | 21195 | hex_string (signature), to_underlying (die->sect_off), |
4262abfb | 21196 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21197 | type = build_error_marker_type (cu, die); |
21198 | } | |
21199 | sig_type->type = type; | |
21200 | ||
21201 | return type; | |
21202 | } | |
21203 | ||
21204 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
21205 | reading in and processing the type unit if necessary. */ | |
21206 | ||
21207 | static struct type * | |
ff39bb5e | 21208 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 21209 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
21210 | { |
21211 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 21212 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
21213 | { |
21214 | struct dwarf2_cu *type_cu = cu; | |
21215 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
21216 | ||
21217 | return read_type_die (type_die, type_cu); | |
21218 | } | |
21219 | else if (attr->form == DW_FORM_ref_sig8) | |
21220 | { | |
21221 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
21222 | } | |
21223 | else | |
21224 | { | |
21225 | complaint (&symfile_complaints, | |
21226 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
21227 | " at 0x%x [in module %s]"), | |
9c541725 | 21228 | dwarf_form_name (attr->form), to_underlying (die->sect_off), |
4262abfb | 21229 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
21230 | return build_error_marker_type (cu, die); |
21231 | } | |
348e048f DE |
21232 | } |
21233 | ||
e5fe5e75 | 21234 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
21235 | |
21236 | static void | |
e5fe5e75 | 21237 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 21238 | { |
52dc124a | 21239 | struct signatured_type *sig_type; |
348e048f | 21240 | |
f4dc4d17 DE |
21241 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
21242 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
21243 | ||
6721b2ec DE |
21244 | /* We have the per_cu, but we need the signatured_type. |
21245 | Fortunately this is an easy translation. */ | |
21246 | gdb_assert (per_cu->is_debug_types); | |
21247 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 21248 | |
6721b2ec | 21249 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21250 | |
52dc124a | 21251 | read_signatured_type (sig_type); |
348e048f | 21252 | |
6721b2ec | 21253 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
21254 | } |
21255 | ||
dee91e82 DE |
21256 | /* die_reader_func for read_signatured_type. |
21257 | This is identical to load_full_comp_unit_reader, | |
21258 | but is kept separate for now. */ | |
348e048f DE |
21259 | |
21260 | static void | |
dee91e82 | 21261 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 21262 | const gdb_byte *info_ptr, |
dee91e82 DE |
21263 | struct die_info *comp_unit_die, |
21264 | int has_children, | |
21265 | void *data) | |
348e048f | 21266 | { |
dee91e82 | 21267 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 21268 | |
dee91e82 DE |
21269 | gdb_assert (cu->die_hash == NULL); |
21270 | cu->die_hash = | |
21271 | htab_create_alloc_ex (cu->header.length / 12, | |
21272 | die_hash, | |
21273 | die_eq, | |
21274 | NULL, | |
21275 | &cu->comp_unit_obstack, | |
21276 | hashtab_obstack_allocate, | |
21277 | dummy_obstack_deallocate); | |
348e048f | 21278 | |
dee91e82 DE |
21279 | if (has_children) |
21280 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
21281 | &info_ptr, comp_unit_die); | |
21282 | cu->dies = comp_unit_die; | |
21283 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
21284 | |
21285 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 21286 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 21287 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
21288 | or we won't be able to build types correctly. |
21289 | Similarly, if we do not read the producer, we can not apply | |
21290 | producer-specific interpretation. */ | |
95554aad | 21291 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 21292 | } |
348e048f | 21293 | |
3019eac3 DE |
21294 | /* Read in a signatured type and build its CU and DIEs. |
21295 | If the type is a stub for the real type in a DWO file, | |
21296 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
21297 | |
21298 | static void | |
21299 | read_signatured_type (struct signatured_type *sig_type) | |
21300 | { | |
21301 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 21302 | |
3019eac3 | 21303 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 21304 | gdb_assert (per_cu->cu == NULL); |
348e048f | 21305 | |
f4dc4d17 DE |
21306 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
21307 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 21308 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
21309 | } |
21310 | ||
c906108c SS |
21311 | /* Decode simple location descriptions. |
21312 | Given a pointer to a dwarf block that defines a location, compute | |
21313 | the location and return the value. | |
21314 | ||
4cecd739 DJ |
21315 | NOTE drow/2003-11-18: This function is called in two situations |
21316 | now: for the address of static or global variables (partial symbols | |
21317 | only) and for offsets into structures which are expected to be | |
21318 | (more or less) constant. The partial symbol case should go away, | |
21319 | and only the constant case should remain. That will let this | |
21320 | function complain more accurately. A few special modes are allowed | |
21321 | without complaint for global variables (for instance, global | |
21322 | register values and thread-local values). | |
c906108c SS |
21323 | |
21324 | A location description containing no operations indicates that the | |
4cecd739 | 21325 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
21326 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
21327 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
21328 | complaint. |
21329 | ||
21330 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
21331 | |
21332 | static CORE_ADDR | |
e7c27a73 | 21333 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 21334 | { |
e7c27a73 | 21335 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
21336 | size_t i; |
21337 | size_t size = blk->size; | |
d521ce57 | 21338 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
21339 | CORE_ADDR stack[64]; |
21340 | int stacki; | |
21341 | unsigned int bytes_read, unsnd; | |
21342 | gdb_byte op; | |
c906108c | 21343 | |
21ae7a4d JK |
21344 | i = 0; |
21345 | stacki = 0; | |
21346 | stack[stacki] = 0; | |
21347 | stack[++stacki] = 0; | |
21348 | ||
21349 | while (i < size) | |
21350 | { | |
21351 | op = data[i++]; | |
21352 | switch (op) | |
21353 | { | |
21354 | case DW_OP_lit0: | |
21355 | case DW_OP_lit1: | |
21356 | case DW_OP_lit2: | |
21357 | case DW_OP_lit3: | |
21358 | case DW_OP_lit4: | |
21359 | case DW_OP_lit5: | |
21360 | case DW_OP_lit6: | |
21361 | case DW_OP_lit7: | |
21362 | case DW_OP_lit8: | |
21363 | case DW_OP_lit9: | |
21364 | case DW_OP_lit10: | |
21365 | case DW_OP_lit11: | |
21366 | case DW_OP_lit12: | |
21367 | case DW_OP_lit13: | |
21368 | case DW_OP_lit14: | |
21369 | case DW_OP_lit15: | |
21370 | case DW_OP_lit16: | |
21371 | case DW_OP_lit17: | |
21372 | case DW_OP_lit18: | |
21373 | case DW_OP_lit19: | |
21374 | case DW_OP_lit20: | |
21375 | case DW_OP_lit21: | |
21376 | case DW_OP_lit22: | |
21377 | case DW_OP_lit23: | |
21378 | case DW_OP_lit24: | |
21379 | case DW_OP_lit25: | |
21380 | case DW_OP_lit26: | |
21381 | case DW_OP_lit27: | |
21382 | case DW_OP_lit28: | |
21383 | case DW_OP_lit29: | |
21384 | case DW_OP_lit30: | |
21385 | case DW_OP_lit31: | |
21386 | stack[++stacki] = op - DW_OP_lit0; | |
21387 | break; | |
f1bea926 | 21388 | |
21ae7a4d JK |
21389 | case DW_OP_reg0: |
21390 | case DW_OP_reg1: | |
21391 | case DW_OP_reg2: | |
21392 | case DW_OP_reg3: | |
21393 | case DW_OP_reg4: | |
21394 | case DW_OP_reg5: | |
21395 | case DW_OP_reg6: | |
21396 | case DW_OP_reg7: | |
21397 | case DW_OP_reg8: | |
21398 | case DW_OP_reg9: | |
21399 | case DW_OP_reg10: | |
21400 | case DW_OP_reg11: | |
21401 | case DW_OP_reg12: | |
21402 | case DW_OP_reg13: | |
21403 | case DW_OP_reg14: | |
21404 | case DW_OP_reg15: | |
21405 | case DW_OP_reg16: | |
21406 | case DW_OP_reg17: | |
21407 | case DW_OP_reg18: | |
21408 | case DW_OP_reg19: | |
21409 | case DW_OP_reg20: | |
21410 | case DW_OP_reg21: | |
21411 | case DW_OP_reg22: | |
21412 | case DW_OP_reg23: | |
21413 | case DW_OP_reg24: | |
21414 | case DW_OP_reg25: | |
21415 | case DW_OP_reg26: | |
21416 | case DW_OP_reg27: | |
21417 | case DW_OP_reg28: | |
21418 | case DW_OP_reg29: | |
21419 | case DW_OP_reg30: | |
21420 | case DW_OP_reg31: | |
21421 | stack[++stacki] = op - DW_OP_reg0; | |
21422 | if (i < size) | |
21423 | dwarf2_complex_location_expr_complaint (); | |
21424 | break; | |
c906108c | 21425 | |
21ae7a4d JK |
21426 | case DW_OP_regx: |
21427 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
21428 | i += bytes_read; | |
21429 | stack[++stacki] = unsnd; | |
21430 | if (i < size) | |
21431 | dwarf2_complex_location_expr_complaint (); | |
21432 | break; | |
c906108c | 21433 | |
21ae7a4d JK |
21434 | case DW_OP_addr: |
21435 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
21436 | cu, &bytes_read); | |
21437 | i += bytes_read; | |
21438 | break; | |
d53d4ac5 | 21439 | |
21ae7a4d JK |
21440 | case DW_OP_const1u: |
21441 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
21442 | i += 1; | |
21443 | break; | |
21444 | ||
21445 | case DW_OP_const1s: | |
21446 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
21447 | i += 1; | |
21448 | break; | |
21449 | ||
21450 | case DW_OP_const2u: | |
21451 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
21452 | i += 2; | |
21453 | break; | |
21454 | ||
21455 | case DW_OP_const2s: | |
21456 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
21457 | i += 2; | |
21458 | break; | |
d53d4ac5 | 21459 | |
21ae7a4d JK |
21460 | case DW_OP_const4u: |
21461 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
21462 | i += 4; | |
21463 | break; | |
21464 | ||
21465 | case DW_OP_const4s: | |
21466 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
21467 | i += 4; | |
21468 | break; | |
21469 | ||
585861ea JK |
21470 | case DW_OP_const8u: |
21471 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
21472 | i += 8; | |
21473 | break; | |
21474 | ||
21ae7a4d JK |
21475 | case DW_OP_constu: |
21476 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
21477 | &bytes_read); | |
21478 | i += bytes_read; | |
21479 | break; | |
21480 | ||
21481 | case DW_OP_consts: | |
21482 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
21483 | i += bytes_read; | |
21484 | break; | |
21485 | ||
21486 | case DW_OP_dup: | |
21487 | stack[stacki + 1] = stack[stacki]; | |
21488 | stacki++; | |
21489 | break; | |
21490 | ||
21491 | case DW_OP_plus: | |
21492 | stack[stacki - 1] += stack[stacki]; | |
21493 | stacki--; | |
21494 | break; | |
21495 | ||
21496 | case DW_OP_plus_uconst: | |
21497 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
21498 | &bytes_read); | |
21499 | i += bytes_read; | |
21500 | break; | |
21501 | ||
21502 | case DW_OP_minus: | |
21503 | stack[stacki - 1] -= stack[stacki]; | |
21504 | stacki--; | |
21505 | break; | |
21506 | ||
21507 | case DW_OP_deref: | |
21508 | /* If we're not the last op, then we definitely can't encode | |
21509 | this using GDB's address_class enum. This is valid for partial | |
21510 | global symbols, although the variable's address will be bogus | |
21511 | in the psymtab. */ | |
21512 | if (i < size) | |
21513 | dwarf2_complex_location_expr_complaint (); | |
21514 | break; | |
21515 | ||
21516 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 21517 | case DW_OP_form_tls_address: |
21ae7a4d JK |
21518 | /* The top of the stack has the offset from the beginning |
21519 | of the thread control block at which the variable is located. */ | |
21520 | /* Nothing should follow this operator, so the top of stack would | |
21521 | be returned. */ | |
21522 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
21523 | address will be bogus in the psymtab. Make it always at least |
21524 | non-zero to not look as a variable garbage collected by linker | |
21525 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
21526 | if (i < size) |
21527 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 21528 | stack[stacki]++; |
21ae7a4d JK |
21529 | break; |
21530 | ||
21531 | case DW_OP_GNU_uninit: | |
21532 | break; | |
21533 | ||
3019eac3 | 21534 | case DW_OP_GNU_addr_index: |
49f6c839 | 21535 | case DW_OP_GNU_const_index: |
3019eac3 DE |
21536 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
21537 | &bytes_read); | |
21538 | i += bytes_read; | |
21539 | break; | |
21540 | ||
21ae7a4d JK |
21541 | default: |
21542 | { | |
f39c6ffd | 21543 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
21544 | |
21545 | if (name) | |
21546 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
21547 | name); | |
21548 | else | |
21549 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
21550 | op); | |
21551 | } | |
21552 | ||
21553 | return (stack[stacki]); | |
d53d4ac5 | 21554 | } |
3c6e0cb3 | 21555 | |
21ae7a4d JK |
21556 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
21557 | outside of the allocated space. Also enforce minimum>0. */ | |
21558 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
21559 | { | |
21560 | complaint (&symfile_complaints, | |
21561 | _("location description stack overflow")); | |
21562 | return 0; | |
21563 | } | |
21564 | ||
21565 | if (stacki <= 0) | |
21566 | { | |
21567 | complaint (&symfile_complaints, | |
21568 | _("location description stack underflow")); | |
21569 | return 0; | |
21570 | } | |
21571 | } | |
21572 | return (stack[stacki]); | |
c906108c SS |
21573 | } |
21574 | ||
21575 | /* memory allocation interface */ | |
21576 | ||
c906108c | 21577 | static struct dwarf_block * |
7b5a2f43 | 21578 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 21579 | { |
8d749320 | 21580 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
21581 | } |
21582 | ||
c906108c | 21583 | static struct die_info * |
b60c80d6 | 21584 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
21585 | { |
21586 | struct die_info *die; | |
b60c80d6 DJ |
21587 | size_t size = sizeof (struct die_info); |
21588 | ||
21589 | if (num_attrs > 1) | |
21590 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 21591 | |
b60c80d6 | 21592 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
21593 | memset (die, 0, sizeof (struct die_info)); |
21594 | return (die); | |
21595 | } | |
2e276125 JB |
21596 | |
21597 | \f | |
21598 | /* Macro support. */ | |
21599 | ||
233d95b5 JK |
21600 | /* Return file name relative to the compilation directory of file number I in |
21601 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 21602 | responsible for freeing it. */ |
233d95b5 | 21603 | |
2e276125 | 21604 | static char * |
233d95b5 | 21605 | file_file_name (int file, struct line_header *lh) |
2e276125 | 21606 | { |
6a83a1e6 EZ |
21607 | /* Is the file number a valid index into the line header's file name |
21608 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 21609 | if (1 <= file && file <= lh->file_names.size ()) |
6a83a1e6 | 21610 | { |
8c43009f | 21611 | const file_entry &fe = lh->file_names[file - 1]; |
6e70227d | 21612 | |
8c43009f PA |
21613 | if (!IS_ABSOLUTE_PATH (fe.name)) |
21614 | { | |
21615 | const char *dir = fe.include_dir (lh); | |
21616 | if (dir != NULL) | |
21617 | return concat (dir, SLASH_STRING, fe.name, (char *) NULL); | |
21618 | } | |
21619 | return xstrdup (fe.name); | |
6a83a1e6 | 21620 | } |
2e276125 JB |
21621 | else |
21622 | { | |
6a83a1e6 EZ |
21623 | /* The compiler produced a bogus file number. We can at least |
21624 | record the macro definitions made in the file, even if we | |
21625 | won't be able to find the file by name. */ | |
21626 | char fake_name[80]; | |
9a619af0 | 21627 | |
8c042590 PM |
21628 | xsnprintf (fake_name, sizeof (fake_name), |
21629 | "<bad macro file number %d>", file); | |
2e276125 | 21630 | |
6e70227d | 21631 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
21632 | _("bad file number in macro information (%d)"), |
21633 | file); | |
2e276125 | 21634 | |
6a83a1e6 | 21635 | return xstrdup (fake_name); |
2e276125 JB |
21636 | } |
21637 | } | |
21638 | ||
233d95b5 JK |
21639 | /* Return the full name of file number I in *LH's file name table. |
21640 | Use COMP_DIR as the name of the current directory of the | |
21641 | compilation. The result is allocated using xmalloc; the caller is | |
21642 | responsible for freeing it. */ | |
21643 | static char * | |
21644 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
21645 | { | |
21646 | /* Is the file number a valid index into the line header's file name | |
21647 | table? Remember that file numbers start with one, not zero. */ | |
fff8551c | 21648 | if (1 <= file && file <= lh->file_names.size ()) |
233d95b5 JK |
21649 | { |
21650 | char *relative = file_file_name (file, lh); | |
21651 | ||
21652 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
21653 | return relative; | |
b36cec19 PA |
21654 | return reconcat (relative, comp_dir, SLASH_STRING, |
21655 | relative, (char *) NULL); | |
233d95b5 JK |
21656 | } |
21657 | else | |
21658 | return file_file_name (file, lh); | |
21659 | } | |
21660 | ||
2e276125 JB |
21661 | |
21662 | static struct macro_source_file * | |
21663 | macro_start_file (int file, int line, | |
21664 | struct macro_source_file *current_file, | |
43f3e411 | 21665 | struct line_header *lh) |
2e276125 | 21666 | { |
233d95b5 JK |
21667 | /* File name relative to the compilation directory of this source file. */ |
21668 | char *file_name = file_file_name (file, lh); | |
2e276125 | 21669 | |
2e276125 | 21670 | if (! current_file) |
abc9d0dc | 21671 | { |
fc474241 DE |
21672 | /* Note: We don't create a macro table for this compilation unit |
21673 | at all until we actually get a filename. */ | |
43f3e411 | 21674 | struct macro_table *macro_table = get_macro_table (); |
fc474241 | 21675 | |
abc9d0dc TT |
21676 | /* If we have no current file, then this must be the start_file |
21677 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
21678 | current_file = macro_set_main (macro_table, file_name); |
21679 | macro_define_special (macro_table); | |
abc9d0dc | 21680 | } |
2e276125 | 21681 | else |
233d95b5 | 21682 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 21683 | |
233d95b5 | 21684 | xfree (file_name); |
6e70227d | 21685 | |
2e276125 JB |
21686 | return current_file; |
21687 | } | |
21688 | ||
2e276125 JB |
21689 | static const char * |
21690 | consume_improper_spaces (const char *p, const char *body) | |
21691 | { | |
21692 | if (*p == ' ') | |
21693 | { | |
4d3c2250 | 21694 | complaint (&symfile_complaints, |
3e43a32a MS |
21695 | _("macro definition contains spaces " |
21696 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 21697 | body); |
2e276125 JB |
21698 | |
21699 | while (*p == ' ') | |
21700 | p++; | |
21701 | } | |
21702 | ||
21703 | return p; | |
21704 | } | |
21705 | ||
21706 | ||
21707 | static void | |
21708 | parse_macro_definition (struct macro_source_file *file, int line, | |
21709 | const char *body) | |
21710 | { | |
21711 | const char *p; | |
21712 | ||
21713 | /* The body string takes one of two forms. For object-like macro | |
21714 | definitions, it should be: | |
21715 | ||
21716 | <macro name> " " <definition> | |
21717 | ||
21718 | For function-like macro definitions, it should be: | |
21719 | ||
21720 | <macro name> "() " <definition> | |
21721 | or | |
21722 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
21723 | ||
21724 | Spaces may appear only where explicitly indicated, and in the | |
21725 | <definition>. | |
21726 | ||
21727 | The Dwarf 2 spec says that an object-like macro's name is always | |
21728 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 21729 | the space when the macro's definition is the empty string. |
2e276125 JB |
21730 | |
21731 | The Dwarf 2 spec says that there should be no spaces between the | |
21732 | formal arguments in a function-like macro's formal argument list, | |
21733 | but versions of GCC around March 2002 include spaces after the | |
21734 | commas. */ | |
21735 | ||
21736 | ||
21737 | /* Find the extent of the macro name. The macro name is terminated | |
21738 | by either a space or null character (for an object-like macro) or | |
21739 | an opening paren (for a function-like macro). */ | |
21740 | for (p = body; *p; p++) | |
21741 | if (*p == ' ' || *p == '(') | |
21742 | break; | |
21743 | ||
21744 | if (*p == ' ' || *p == '\0') | |
21745 | { | |
21746 | /* It's an object-like macro. */ | |
21747 | int name_len = p - body; | |
3f8a7804 | 21748 | char *name = savestring (body, name_len); |
2e276125 JB |
21749 | const char *replacement; |
21750 | ||
21751 | if (*p == ' ') | |
21752 | replacement = body + name_len + 1; | |
21753 | else | |
21754 | { | |
4d3c2250 | 21755 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21756 | replacement = body + name_len; |
21757 | } | |
6e70227d | 21758 | |
2e276125 JB |
21759 | macro_define_object (file, line, name, replacement); |
21760 | ||
21761 | xfree (name); | |
21762 | } | |
21763 | else if (*p == '(') | |
21764 | { | |
21765 | /* It's a function-like macro. */ | |
3f8a7804 | 21766 | char *name = savestring (body, p - body); |
2e276125 JB |
21767 | int argc = 0; |
21768 | int argv_size = 1; | |
8d749320 | 21769 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
21770 | |
21771 | p++; | |
21772 | ||
21773 | p = consume_improper_spaces (p, body); | |
21774 | ||
21775 | /* Parse the formal argument list. */ | |
21776 | while (*p && *p != ')') | |
21777 | { | |
21778 | /* Find the extent of the current argument name. */ | |
21779 | const char *arg_start = p; | |
21780 | ||
21781 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
21782 | p++; | |
21783 | ||
21784 | if (! *p || p == arg_start) | |
4d3c2250 | 21785 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21786 | else |
21787 | { | |
21788 | /* Make sure argv has room for the new argument. */ | |
21789 | if (argc >= argv_size) | |
21790 | { | |
21791 | argv_size *= 2; | |
224c3ddb | 21792 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
21793 | } |
21794 | ||
3f8a7804 | 21795 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
21796 | } |
21797 | ||
21798 | p = consume_improper_spaces (p, body); | |
21799 | ||
21800 | /* Consume the comma, if present. */ | |
21801 | if (*p == ',') | |
21802 | { | |
21803 | p++; | |
21804 | ||
21805 | p = consume_improper_spaces (p, body); | |
21806 | } | |
21807 | } | |
21808 | ||
21809 | if (*p == ')') | |
21810 | { | |
21811 | p++; | |
21812 | ||
21813 | if (*p == ' ') | |
21814 | /* Perfectly formed definition, no complaints. */ | |
21815 | macro_define_function (file, line, name, | |
6e70227d | 21816 | argc, (const char **) argv, |
2e276125 JB |
21817 | p + 1); |
21818 | else if (*p == '\0') | |
21819 | { | |
21820 | /* Complain, but do define it. */ | |
4d3c2250 | 21821 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 21822 | macro_define_function (file, line, name, |
6e70227d | 21823 | argc, (const char **) argv, |
2e276125 JB |
21824 | p); |
21825 | } | |
21826 | else | |
21827 | /* Just complain. */ | |
4d3c2250 | 21828 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21829 | } |
21830 | else | |
21831 | /* Just complain. */ | |
4d3c2250 | 21832 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21833 | |
21834 | xfree (name); | |
21835 | { | |
21836 | int i; | |
21837 | ||
21838 | for (i = 0; i < argc; i++) | |
21839 | xfree (argv[i]); | |
21840 | } | |
21841 | xfree (argv); | |
21842 | } | |
21843 | else | |
4d3c2250 | 21844 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
21845 | } |
21846 | ||
cf2c3c16 TT |
21847 | /* Skip some bytes from BYTES according to the form given in FORM. |
21848 | Returns the new pointer. */ | |
2e276125 | 21849 | |
d521ce57 TT |
21850 | static const gdb_byte * |
21851 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
21852 | enum dwarf_form form, |
21853 | unsigned int offset_size, | |
21854 | struct dwarf2_section_info *section) | |
2e276125 | 21855 | { |
cf2c3c16 | 21856 | unsigned int bytes_read; |
2e276125 | 21857 | |
cf2c3c16 | 21858 | switch (form) |
2e276125 | 21859 | { |
cf2c3c16 TT |
21860 | case DW_FORM_data1: |
21861 | case DW_FORM_flag: | |
21862 | ++bytes; | |
21863 | break; | |
21864 | ||
21865 | case DW_FORM_data2: | |
21866 | bytes += 2; | |
21867 | break; | |
21868 | ||
21869 | case DW_FORM_data4: | |
21870 | bytes += 4; | |
21871 | break; | |
21872 | ||
21873 | case DW_FORM_data8: | |
21874 | bytes += 8; | |
21875 | break; | |
21876 | ||
0224619f JK |
21877 | case DW_FORM_data16: |
21878 | bytes += 16; | |
21879 | break; | |
21880 | ||
cf2c3c16 TT |
21881 | case DW_FORM_string: |
21882 | read_direct_string (abfd, bytes, &bytes_read); | |
21883 | bytes += bytes_read; | |
21884 | break; | |
21885 | ||
21886 | case DW_FORM_sec_offset: | |
21887 | case DW_FORM_strp: | |
36586728 | 21888 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
21889 | bytes += offset_size; |
21890 | break; | |
21891 | ||
21892 | case DW_FORM_block: | |
21893 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
21894 | bytes += bytes_read; | |
21895 | break; | |
21896 | ||
21897 | case DW_FORM_block1: | |
21898 | bytes += 1 + read_1_byte (abfd, bytes); | |
21899 | break; | |
21900 | case DW_FORM_block2: | |
21901 | bytes += 2 + read_2_bytes (abfd, bytes); | |
21902 | break; | |
21903 | case DW_FORM_block4: | |
21904 | bytes += 4 + read_4_bytes (abfd, bytes); | |
21905 | break; | |
21906 | ||
21907 | case DW_FORM_sdata: | |
21908 | case DW_FORM_udata: | |
3019eac3 DE |
21909 | case DW_FORM_GNU_addr_index: |
21910 | case DW_FORM_GNU_str_index: | |
d521ce57 | 21911 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
21912 | if (bytes == NULL) |
21913 | { | |
21914 | dwarf2_section_buffer_overflow_complaint (section); | |
21915 | return NULL; | |
21916 | } | |
cf2c3c16 TT |
21917 | break; |
21918 | ||
663c44ac JK |
21919 | case DW_FORM_implicit_const: |
21920 | break; | |
21921 | ||
cf2c3c16 TT |
21922 | default: |
21923 | { | |
21924 | complain: | |
21925 | complaint (&symfile_complaints, | |
21926 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 21927 | form, get_section_name (section)); |
cf2c3c16 TT |
21928 | return NULL; |
21929 | } | |
2e276125 JB |
21930 | } |
21931 | ||
cf2c3c16 TT |
21932 | return bytes; |
21933 | } | |
757a13d0 | 21934 | |
cf2c3c16 TT |
21935 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
21936 | opcode. Returns an updated pointer to the macro data buffer; or, | |
21937 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 21938 | |
d521ce57 | 21939 | static const gdb_byte * |
cf2c3c16 | 21940 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
21941 | const gdb_byte **opcode_definitions, |
21942 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
21943 | bfd *abfd, |
21944 | unsigned int offset_size, | |
21945 | struct dwarf2_section_info *section) | |
21946 | { | |
21947 | unsigned int bytes_read, i; | |
21948 | unsigned long arg; | |
d521ce57 | 21949 | const gdb_byte *defn; |
2e276125 | 21950 | |
cf2c3c16 | 21951 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 21952 | { |
cf2c3c16 TT |
21953 | complaint (&symfile_complaints, |
21954 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
21955 | opcode); | |
21956 | return NULL; | |
21957 | } | |
2e276125 | 21958 | |
cf2c3c16 TT |
21959 | defn = opcode_definitions[opcode]; |
21960 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
21961 | defn += bytes_read; | |
2e276125 | 21962 | |
cf2c3c16 TT |
21963 | for (i = 0; i < arg; ++i) |
21964 | { | |
aead7601 SM |
21965 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
21966 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 21967 | section); |
cf2c3c16 TT |
21968 | if (mac_ptr == NULL) |
21969 | { | |
21970 | /* skip_form_bytes already issued the complaint. */ | |
21971 | return NULL; | |
21972 | } | |
21973 | } | |
757a13d0 | 21974 | |
cf2c3c16 TT |
21975 | return mac_ptr; |
21976 | } | |
757a13d0 | 21977 | |
cf2c3c16 TT |
21978 | /* A helper function which parses the header of a macro section. |
21979 | If the macro section is the extended (for now called "GNU") type, | |
21980 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
21981 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 21982 | |
d521ce57 TT |
21983 | static const gdb_byte * |
21984 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 21985 | bfd *abfd, |
d521ce57 | 21986 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
21987 | unsigned int *offset_size, |
21988 | int section_is_gnu) | |
21989 | { | |
21990 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 21991 | |
cf2c3c16 TT |
21992 | if (section_is_gnu) |
21993 | { | |
21994 | unsigned int version, flags; | |
757a13d0 | 21995 | |
cf2c3c16 | 21996 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 21997 | if (version != 4 && version != 5) |
cf2c3c16 TT |
21998 | { |
21999 | complaint (&symfile_complaints, | |
22000 | _("unrecognized version `%d' in .debug_macro section"), | |
22001 | version); | |
22002 | return NULL; | |
22003 | } | |
22004 | mac_ptr += 2; | |
757a13d0 | 22005 | |
cf2c3c16 TT |
22006 | flags = read_1_byte (abfd, mac_ptr); |
22007 | ++mac_ptr; | |
22008 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 22009 | |
cf2c3c16 TT |
22010 | if ((flags & 2) != 0) |
22011 | /* We don't need the line table offset. */ | |
22012 | mac_ptr += *offset_size; | |
757a13d0 | 22013 | |
cf2c3c16 TT |
22014 | /* Vendor opcode descriptions. */ |
22015 | if ((flags & 4) != 0) | |
22016 | { | |
22017 | unsigned int i, count; | |
757a13d0 | 22018 | |
cf2c3c16 TT |
22019 | count = read_1_byte (abfd, mac_ptr); |
22020 | ++mac_ptr; | |
22021 | for (i = 0; i < count; ++i) | |
22022 | { | |
22023 | unsigned int opcode, bytes_read; | |
22024 | unsigned long arg; | |
22025 | ||
22026 | opcode = read_1_byte (abfd, mac_ptr); | |
22027 | ++mac_ptr; | |
22028 | opcode_definitions[opcode] = mac_ptr; | |
22029 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22030 | mac_ptr += bytes_read; | |
22031 | mac_ptr += arg; | |
22032 | } | |
757a13d0 | 22033 | } |
cf2c3c16 | 22034 | } |
757a13d0 | 22035 | |
cf2c3c16 TT |
22036 | return mac_ptr; |
22037 | } | |
757a13d0 | 22038 | |
cf2c3c16 | 22039 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 22040 | including DW_MACRO_import. */ |
cf2c3c16 TT |
22041 | |
22042 | static void | |
d521ce57 TT |
22043 | dwarf_decode_macro_bytes (bfd *abfd, |
22044 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 22045 | struct macro_source_file *current_file, |
43f3e411 | 22046 | struct line_header *lh, |
cf2c3c16 | 22047 | struct dwarf2_section_info *section, |
36586728 | 22048 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 22049 | unsigned int offset_size, |
8fc3fc34 | 22050 | htab_t include_hash) |
cf2c3c16 | 22051 | { |
4d663531 | 22052 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
22053 | enum dwarf_macro_record_type macinfo_type; |
22054 | int at_commandline; | |
d521ce57 | 22055 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 22056 | |
cf2c3c16 TT |
22057 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
22058 | &offset_size, section_is_gnu); | |
22059 | if (mac_ptr == NULL) | |
22060 | { | |
22061 | /* We already issued a complaint. */ | |
22062 | return; | |
22063 | } | |
757a13d0 JK |
22064 | |
22065 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
22066 | GDB is still reading the definitions from command line. First | |
22067 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
22068 | to create CURRENT_FILE for the main source holding also the command line | |
22069 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
22070 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
22071 | ||
22072 | at_commandline = 1; | |
22073 | ||
22074 | do | |
22075 | { | |
22076 | /* Do we at least have room for a macinfo type byte? */ | |
22077 | if (mac_ptr >= mac_end) | |
22078 | { | |
f664829e | 22079 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
22080 | break; |
22081 | } | |
22082 | ||
aead7601 | 22083 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
22084 | mac_ptr++; |
22085 | ||
cf2c3c16 TT |
22086 | /* Note that we rely on the fact that the corresponding GNU and |
22087 | DWARF constants are the same. */ | |
757a13d0 JK |
22088 | switch (macinfo_type) |
22089 | { | |
22090 | /* A zero macinfo type indicates the end of the macro | |
22091 | information. */ | |
22092 | case 0: | |
22093 | break; | |
2e276125 | 22094 | |
0af92d60 JK |
22095 | case DW_MACRO_define: |
22096 | case DW_MACRO_undef: | |
22097 | case DW_MACRO_define_strp: | |
22098 | case DW_MACRO_undef_strp: | |
22099 | case DW_MACRO_define_sup: | |
22100 | case DW_MACRO_undef_sup: | |
2e276125 | 22101 | { |
891d2f0b | 22102 | unsigned int bytes_read; |
2e276125 | 22103 | int line; |
d521ce57 | 22104 | const char *body; |
cf2c3c16 | 22105 | int is_define; |
2e276125 | 22106 | |
cf2c3c16 TT |
22107 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
22108 | mac_ptr += bytes_read; | |
22109 | ||
0af92d60 JK |
22110 | if (macinfo_type == DW_MACRO_define |
22111 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
22112 | { |
22113 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
22114 | mac_ptr += bytes_read; | |
22115 | } | |
22116 | else | |
22117 | { | |
22118 | LONGEST str_offset; | |
22119 | ||
22120 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22121 | mac_ptr += offset_size; | |
2e276125 | 22122 | |
0af92d60 JK |
22123 | if (macinfo_type == DW_MACRO_define_sup |
22124 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 22125 | || section_is_dwz) |
36586728 TT |
22126 | { |
22127 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22128 | ||
22129 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
22130 | } | |
22131 | else | |
22132 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
22133 | } |
22134 | ||
0af92d60 JK |
22135 | is_define = (macinfo_type == DW_MACRO_define |
22136 | || macinfo_type == DW_MACRO_define_strp | |
22137 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 22138 | if (! current_file) |
757a13d0 JK |
22139 | { |
22140 | /* DWARF violation as no main source is present. */ | |
22141 | complaint (&symfile_complaints, | |
22142 | _("debug info with no main source gives macro %s " | |
22143 | "on line %d: %s"), | |
cf2c3c16 TT |
22144 | is_define ? _("definition") : _("undefinition"), |
22145 | line, body); | |
757a13d0 JK |
22146 | break; |
22147 | } | |
3e43a32a MS |
22148 | if ((line == 0 && !at_commandline) |
22149 | || (line != 0 && at_commandline)) | |
4d3c2250 | 22150 | complaint (&symfile_complaints, |
757a13d0 JK |
22151 | _("debug info gives %s macro %s with %s line %d: %s"), |
22152 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 22153 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
22154 | line == 0 ? _("zero") : _("non-zero"), line, body); |
22155 | ||
cf2c3c16 | 22156 | if (is_define) |
757a13d0 | 22157 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
22158 | else |
22159 | { | |
0af92d60 JK |
22160 | gdb_assert (macinfo_type == DW_MACRO_undef |
22161 | || macinfo_type == DW_MACRO_undef_strp | |
22162 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
22163 | macro_undef (current_file, line, body); |
22164 | } | |
2e276125 JB |
22165 | } |
22166 | break; | |
22167 | ||
0af92d60 | 22168 | case DW_MACRO_start_file: |
2e276125 | 22169 | { |
891d2f0b | 22170 | unsigned int bytes_read; |
2e276125 JB |
22171 | int line, file; |
22172 | ||
22173 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22174 | mac_ptr += bytes_read; | |
22175 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22176 | mac_ptr += bytes_read; | |
22177 | ||
3e43a32a MS |
22178 | if ((line == 0 && !at_commandline) |
22179 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
22180 | complaint (&symfile_complaints, |
22181 | _("debug info gives source %d included " | |
22182 | "from %s at %s line %d"), | |
22183 | file, at_commandline ? _("command-line") : _("file"), | |
22184 | line == 0 ? _("zero") : _("non-zero"), line); | |
22185 | ||
22186 | if (at_commandline) | |
22187 | { | |
0af92d60 | 22188 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 22189 | pass one. */ |
757a13d0 JK |
22190 | at_commandline = 0; |
22191 | } | |
22192 | else | |
43f3e411 | 22193 | current_file = macro_start_file (file, line, current_file, lh); |
2e276125 JB |
22194 | } |
22195 | break; | |
22196 | ||
0af92d60 | 22197 | case DW_MACRO_end_file: |
2e276125 | 22198 | if (! current_file) |
4d3c2250 | 22199 | complaint (&symfile_complaints, |
3e43a32a MS |
22200 | _("macro debug info has an unmatched " |
22201 | "`close_file' directive")); | |
2e276125 JB |
22202 | else |
22203 | { | |
22204 | current_file = current_file->included_by; | |
22205 | if (! current_file) | |
22206 | { | |
cf2c3c16 | 22207 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
22208 | |
22209 | /* GCC circa March 2002 doesn't produce the zero | |
22210 | type byte marking the end of the compilation | |
22211 | unit. Complain if it's not there, but exit no | |
22212 | matter what. */ | |
22213 | ||
22214 | /* Do we at least have room for a macinfo type byte? */ | |
22215 | if (mac_ptr >= mac_end) | |
22216 | { | |
f664829e | 22217 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
22218 | return; |
22219 | } | |
22220 | ||
22221 | /* We don't increment mac_ptr here, so this is just | |
22222 | a look-ahead. */ | |
aead7601 SM |
22223 | next_type |
22224 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
22225 | mac_ptr); | |
2e276125 | 22226 | if (next_type != 0) |
4d3c2250 | 22227 | complaint (&symfile_complaints, |
3e43a32a MS |
22228 | _("no terminating 0-type entry for " |
22229 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
22230 | |
22231 | return; | |
22232 | } | |
22233 | } | |
22234 | break; | |
22235 | ||
0af92d60 JK |
22236 | case DW_MACRO_import: |
22237 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
22238 | { |
22239 | LONGEST offset; | |
8fc3fc34 | 22240 | void **slot; |
a036ba48 TT |
22241 | bfd *include_bfd = abfd; |
22242 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 22243 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 22244 | int is_dwz = section_is_dwz; |
d521ce57 | 22245 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
22246 | |
22247 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
22248 | mac_ptr += offset_size; | |
22249 | ||
0af92d60 | 22250 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 TT |
22251 | { |
22252 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
22253 | ||
4d663531 | 22254 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 22255 | |
a036ba48 | 22256 | include_section = &dwz->macro; |
a32a8923 | 22257 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
22258 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
22259 | is_dwz = 1; | |
22260 | } | |
22261 | ||
22262 | new_mac_ptr = include_section->buffer + offset; | |
22263 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
22264 | ||
8fc3fc34 TT |
22265 | if (*slot != NULL) |
22266 | { | |
22267 | /* This has actually happened; see | |
22268 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
22269 | complaint (&symfile_complaints, | |
0af92d60 | 22270 | _("recursive DW_MACRO_import in " |
8fc3fc34 TT |
22271 | ".debug_macro section")); |
22272 | } | |
22273 | else | |
22274 | { | |
d521ce57 | 22275 | *slot = (void *) new_mac_ptr; |
36586728 | 22276 | |
a036ba48 | 22277 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
43f3e411 | 22278 | include_mac_end, current_file, lh, |
36586728 | 22279 | section, section_is_gnu, is_dwz, |
4d663531 | 22280 | offset_size, include_hash); |
8fc3fc34 | 22281 | |
d521ce57 | 22282 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 22283 | } |
cf2c3c16 TT |
22284 | } |
22285 | break; | |
22286 | ||
2e276125 | 22287 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
22288 | if (!section_is_gnu) |
22289 | { | |
22290 | unsigned int bytes_read; | |
2e276125 | 22291 | |
ac298888 TT |
22292 | /* This reads the constant, but since we don't recognize |
22293 | any vendor extensions, we ignore it. */ | |
22294 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
22295 | mac_ptr += bytes_read; |
22296 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22297 | mac_ptr += bytes_read; | |
2e276125 | 22298 | |
cf2c3c16 TT |
22299 | /* We don't recognize any vendor extensions. */ |
22300 | break; | |
22301 | } | |
22302 | /* FALLTHROUGH */ | |
22303 | ||
22304 | default: | |
22305 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22306 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22307 | section); |
22308 | if (mac_ptr == NULL) | |
22309 | return; | |
22310 | break; | |
2e276125 | 22311 | } |
757a13d0 | 22312 | } while (macinfo_type != 0); |
2e276125 | 22313 | } |
8e19ed76 | 22314 | |
cf2c3c16 | 22315 | static void |
09262596 | 22316 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 22317 | int section_is_gnu) |
cf2c3c16 | 22318 | { |
bb5ed363 | 22319 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
22320 | struct line_header *lh = cu->line_header; |
22321 | bfd *abfd; | |
d521ce57 | 22322 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
22323 | struct macro_source_file *current_file = 0; |
22324 | enum dwarf_macro_record_type macinfo_type; | |
22325 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 22326 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 22327 | struct cleanup *cleanup; |
8fc3fc34 | 22328 | void **slot; |
09262596 DE |
22329 | struct dwarf2_section_info *section; |
22330 | const char *section_name; | |
22331 | ||
22332 | if (cu->dwo_unit != NULL) | |
22333 | { | |
22334 | if (section_is_gnu) | |
22335 | { | |
22336 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
22337 | section_name = ".debug_macro.dwo"; | |
22338 | } | |
22339 | else | |
22340 | { | |
22341 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
22342 | section_name = ".debug_macinfo.dwo"; | |
22343 | } | |
22344 | } | |
22345 | else | |
22346 | { | |
22347 | if (section_is_gnu) | |
22348 | { | |
22349 | section = &dwarf2_per_objfile->macro; | |
22350 | section_name = ".debug_macro"; | |
22351 | } | |
22352 | else | |
22353 | { | |
22354 | section = &dwarf2_per_objfile->macinfo; | |
22355 | section_name = ".debug_macinfo"; | |
22356 | } | |
22357 | } | |
cf2c3c16 | 22358 | |
bb5ed363 | 22359 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
22360 | if (section->buffer == NULL) |
22361 | { | |
fceca515 | 22362 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
22363 | return; |
22364 | } | |
a32a8923 | 22365 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
22366 | |
22367 | /* First pass: Find the name of the base filename. | |
22368 | This filename is needed in order to process all macros whose definition | |
22369 | (or undefinition) comes from the command line. These macros are defined | |
22370 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
22371 | associated to the base file. | |
22372 | ||
22373 | To determine the base file name, we scan the macro definitions until we | |
22374 | reach the first DW_MACINFO_start_file entry. We then initialize | |
22375 | CURRENT_FILE accordingly so that any macro definition found before the | |
22376 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
22377 | ||
22378 | mac_ptr = section->buffer + offset; | |
22379 | mac_end = section->buffer + section->size; | |
22380 | ||
22381 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
22382 | &offset_size, section_is_gnu); | |
22383 | if (mac_ptr == NULL) | |
22384 | { | |
22385 | /* We already issued a complaint. */ | |
22386 | return; | |
22387 | } | |
22388 | ||
22389 | do | |
22390 | { | |
22391 | /* Do we at least have room for a macinfo type byte? */ | |
22392 | if (mac_ptr >= mac_end) | |
22393 | { | |
22394 | /* Complaint is printed during the second pass as GDB will probably | |
22395 | stop the first pass earlier upon finding | |
22396 | DW_MACINFO_start_file. */ | |
22397 | break; | |
22398 | } | |
22399 | ||
aead7601 | 22400 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
22401 | mac_ptr++; |
22402 | ||
22403 | /* Note that we rely on the fact that the corresponding GNU and | |
22404 | DWARF constants are the same. */ | |
22405 | switch (macinfo_type) | |
22406 | { | |
22407 | /* A zero macinfo type indicates the end of the macro | |
22408 | information. */ | |
22409 | case 0: | |
22410 | break; | |
22411 | ||
0af92d60 JK |
22412 | case DW_MACRO_define: |
22413 | case DW_MACRO_undef: | |
cf2c3c16 TT |
22414 | /* Only skip the data by MAC_PTR. */ |
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 | break; | |
22424 | ||
0af92d60 | 22425 | case DW_MACRO_start_file: |
cf2c3c16 TT |
22426 | { |
22427 | unsigned int bytes_read; | |
22428 | int line, file; | |
22429 | ||
22430 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22431 | mac_ptr += bytes_read; | |
22432 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22433 | mac_ptr += bytes_read; | |
22434 | ||
43f3e411 | 22435 | current_file = macro_start_file (file, line, current_file, lh); |
cf2c3c16 TT |
22436 | } |
22437 | break; | |
22438 | ||
0af92d60 | 22439 | case DW_MACRO_end_file: |
cf2c3c16 TT |
22440 | /* No data to skip by MAC_PTR. */ |
22441 | break; | |
22442 | ||
0af92d60 JK |
22443 | case DW_MACRO_define_strp: |
22444 | case DW_MACRO_undef_strp: | |
22445 | case DW_MACRO_define_sup: | |
22446 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
22447 | { |
22448 | unsigned int bytes_read; | |
22449 | ||
22450 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22451 | mac_ptr += bytes_read; | |
22452 | mac_ptr += offset_size; | |
22453 | } | |
22454 | break; | |
22455 | ||
0af92d60 JK |
22456 | case DW_MACRO_import: |
22457 | case DW_MACRO_import_sup: | |
cf2c3c16 | 22458 | /* Note that, according to the spec, a transparent include |
0af92d60 | 22459 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
22460 | skip this opcode. */ |
22461 | mac_ptr += offset_size; | |
22462 | break; | |
22463 | ||
22464 | case DW_MACINFO_vendor_ext: | |
22465 | /* Only skip the data by MAC_PTR. */ | |
22466 | if (!section_is_gnu) | |
22467 | { | |
22468 | unsigned int bytes_read; | |
22469 | ||
22470 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
22471 | mac_ptr += bytes_read; | |
22472 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
22473 | mac_ptr += bytes_read; | |
22474 | } | |
22475 | /* FALLTHROUGH */ | |
22476 | ||
22477 | default: | |
22478 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 22479 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
22480 | section); |
22481 | if (mac_ptr == NULL) | |
22482 | return; | |
22483 | break; | |
22484 | } | |
22485 | } while (macinfo_type != 0 && current_file == NULL); | |
22486 | ||
22487 | /* Second pass: Process all entries. | |
22488 | ||
22489 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
22490 | command-line macro definitions/undefinitions. This flag is unset when we | |
22491 | reach the first DW_MACINFO_start_file entry. */ | |
22492 | ||
fc4007c9 TT |
22493 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
22494 | htab_eq_pointer, | |
22495 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 22496 | mac_ptr = section->buffer + offset; |
fc4007c9 | 22497 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 22498 | *slot = (void *) mac_ptr; |
8fc3fc34 | 22499 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
43f3e411 | 22500 | current_file, lh, section, |
fc4007c9 TT |
22501 | section_is_gnu, 0, offset_size, |
22502 | include_hash.get ()); | |
cf2c3c16 TT |
22503 | } |
22504 | ||
8e19ed76 | 22505 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 22506 | if so return true else false. */ |
380bca97 | 22507 | |
8e19ed76 | 22508 | static int |
6e5a29e1 | 22509 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
22510 | { |
22511 | return (attr == NULL ? 0 : | |
22512 | attr->form == DW_FORM_block1 | |
22513 | || attr->form == DW_FORM_block2 | |
22514 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
22515 | || attr->form == DW_FORM_block |
22516 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 22517 | } |
4c2df51b | 22518 | |
c6a0999f JB |
22519 | /* Return non-zero if ATTR's value is a section offset --- classes |
22520 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
22521 | You may use DW_UNSND (attr) to retrieve such offsets. | |
22522 | ||
22523 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
22524 | may have a value that belongs to more than one of these classes; it | |
22525 | would be ambiguous if we did, because we use the same forms for all | |
22526 | of them. */ | |
380bca97 | 22527 | |
3690dd37 | 22528 | static int |
6e5a29e1 | 22529 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
22530 | { |
22531 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
22532 | || attr->form == DW_FORM_data8 |
22533 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
22534 | } |
22535 | ||
3690dd37 JB |
22536 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
22537 | zero otherwise. When this function returns true, you can apply | |
22538 | dwarf2_get_attr_constant_value to it. | |
22539 | ||
22540 | However, note that for some attributes you must check | |
22541 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
22542 | and DW_FORM_data8 are members of both the constant class, and of | |
22543 | the classes that contain offsets into other debug sections | |
22544 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
22545 | that, if an attribute's can be either a constant or one of the | |
22546 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
22547 | taken as section offsets, not constants. |
22548 | ||
22549 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
22550 | cannot handle that. */ | |
380bca97 | 22551 | |
3690dd37 | 22552 | static int |
6e5a29e1 | 22553 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
22554 | { |
22555 | switch (attr->form) | |
22556 | { | |
22557 | case DW_FORM_sdata: | |
22558 | case DW_FORM_udata: | |
22559 | case DW_FORM_data1: | |
22560 | case DW_FORM_data2: | |
22561 | case DW_FORM_data4: | |
22562 | case DW_FORM_data8: | |
663c44ac | 22563 | case DW_FORM_implicit_const: |
3690dd37 JB |
22564 | return 1; |
22565 | default: | |
22566 | return 0; | |
22567 | } | |
22568 | } | |
22569 | ||
7771576e SA |
22570 | |
22571 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
22572 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
22573 | ||
22574 | static int | |
6e5a29e1 | 22575 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
22576 | { |
22577 | switch (attr->form) | |
22578 | { | |
22579 | case DW_FORM_ref_addr: | |
22580 | case DW_FORM_ref1: | |
22581 | case DW_FORM_ref2: | |
22582 | case DW_FORM_ref4: | |
22583 | case DW_FORM_ref8: | |
22584 | case DW_FORM_ref_udata: | |
22585 | case DW_FORM_GNU_ref_alt: | |
22586 | return 1; | |
22587 | default: | |
22588 | return 0; | |
22589 | } | |
22590 | } | |
22591 | ||
3019eac3 DE |
22592 | /* Return the .debug_loc section to use for CU. |
22593 | For DWO files use .debug_loc.dwo. */ | |
22594 | ||
22595 | static struct dwarf2_section_info * | |
22596 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
22597 | { | |
22598 | if (cu->dwo_unit) | |
43988095 JK |
22599 | { |
22600 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
22601 | ||
22602 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; | |
22603 | } | |
22604 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
22605 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
22606 | } |
22607 | ||
8cf6f0b1 TT |
22608 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
22609 | ||
22610 | static void | |
22611 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
22612 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 22613 | const struct attribute *attr) |
8cf6f0b1 | 22614 | { |
3019eac3 DE |
22615 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
22616 | ||
22617 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
22618 | |
22619 | baton->per_cu = cu->per_cu; | |
22620 | gdb_assert (baton->per_cu); | |
22621 | /* We don't know how long the location list is, but make sure we | |
22622 | don't run off the edge of the section. */ | |
3019eac3 DE |
22623 | baton->size = section->size - DW_UNSND (attr); |
22624 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 22625 | baton->base_address = cu->base_address; |
f664829e | 22626 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
22627 | } |
22628 | ||
4c2df51b | 22629 | static void |
ff39bb5e | 22630 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 22631 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 22632 | { |
bb5ed363 | 22633 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 22634 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 22635 | |
3690dd37 | 22636 | if (attr_form_is_section_offset (attr) |
3019eac3 | 22637 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
22638 | the section. If so, fall through to the complaint in the |
22639 | other branch. */ | |
3019eac3 | 22640 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 22641 | { |
0d53c4c4 | 22642 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 22643 | |
8d749320 | 22644 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 22645 | |
8cf6f0b1 | 22646 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 22647 | |
d00adf39 | 22648 | if (cu->base_known == 0) |
0d53c4c4 | 22649 | complaint (&symfile_complaints, |
3e43a32a MS |
22650 | _("Location list used without " |
22651 | "specifying the CU base address.")); | |
4c2df51b | 22652 | |
f1e6e072 TT |
22653 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
22654 | ? dwarf2_loclist_block_index | |
22655 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
22656 | SYMBOL_LOCATION_BATON (sym) = baton; |
22657 | } | |
22658 | else | |
22659 | { | |
22660 | struct dwarf2_locexpr_baton *baton; | |
22661 | ||
8d749320 | 22662 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
22663 | baton->per_cu = cu->per_cu; |
22664 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
22665 | |
22666 | if (attr_form_is_block (attr)) | |
22667 | { | |
22668 | /* Note that we're just copying the block's data pointer | |
22669 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
22670 | info_buffer for SYM's objfile; right now we never release |
22671 | that buffer, but when we do clean up properly this may | |
22672 | need to change. */ | |
0d53c4c4 DJ |
22673 | baton->size = DW_BLOCK (attr)->size; |
22674 | baton->data = DW_BLOCK (attr)->data; | |
22675 | } | |
22676 | else | |
22677 | { | |
22678 | dwarf2_invalid_attrib_class_complaint ("location description", | |
22679 | SYMBOL_NATURAL_NAME (sym)); | |
22680 | baton->size = 0; | |
0d53c4c4 | 22681 | } |
6e70227d | 22682 | |
f1e6e072 TT |
22683 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
22684 | ? dwarf2_locexpr_block_index | |
22685 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
22686 | SYMBOL_LOCATION_BATON (sym) = baton; |
22687 | } | |
4c2df51b | 22688 | } |
6502dd73 | 22689 | |
9aa1f1e3 TT |
22690 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
22691 | came from a separate debuginfo file, then the master objfile is | |
22692 | returned. */ | |
ae0d2f24 UW |
22693 | |
22694 | struct objfile * | |
22695 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
22696 | { | |
9291a0cd | 22697 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
22698 | |
22699 | /* Return the master objfile, so that we can report and look up the | |
22700 | correct file containing this variable. */ | |
22701 | if (objfile->separate_debug_objfile_backlink) | |
22702 | objfile = objfile->separate_debug_objfile_backlink; | |
22703 | ||
22704 | return objfile; | |
22705 | } | |
22706 | ||
96408a79 SA |
22707 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
22708 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
22709 | CU_HEADERP first. */ | |
22710 | ||
22711 | static const struct comp_unit_head * | |
22712 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
22713 | struct dwarf2_per_cu_data *per_cu) | |
22714 | { | |
d521ce57 | 22715 | const gdb_byte *info_ptr; |
96408a79 SA |
22716 | |
22717 | if (per_cu->cu) | |
22718 | return &per_cu->cu->header; | |
22719 | ||
9c541725 | 22720 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
22721 | |
22722 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
22723 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
22724 | rcuh_kind::COMPILE); | |
96408a79 SA |
22725 | |
22726 | return cu_headerp; | |
22727 | } | |
22728 | ||
ae0d2f24 UW |
22729 | /* Return the address size given in the compilation unit header for CU. */ |
22730 | ||
98714339 | 22731 | int |
ae0d2f24 UW |
22732 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
22733 | { | |
96408a79 SA |
22734 | struct comp_unit_head cu_header_local; |
22735 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 22736 | |
96408a79 SA |
22737 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22738 | ||
22739 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
22740 | } |
22741 | ||
9eae7c52 TT |
22742 | /* Return the offset size given in the compilation unit header for CU. */ |
22743 | ||
22744 | int | |
22745 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
22746 | { | |
96408a79 SA |
22747 | struct comp_unit_head cu_header_local; |
22748 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 22749 | |
96408a79 SA |
22750 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
22751 | ||
22752 | return cu_headerp->offset_size; | |
22753 | } | |
22754 | ||
22755 | /* See its dwarf2loc.h declaration. */ | |
22756 | ||
22757 | int | |
22758 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
22759 | { | |
22760 | struct comp_unit_head cu_header_local; | |
22761 | const struct comp_unit_head *cu_headerp; | |
22762 | ||
22763 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
22764 | ||
22765 | if (cu_headerp->version == 2) | |
22766 | return cu_headerp->addr_size; | |
22767 | else | |
22768 | return cu_headerp->offset_size; | |
181cebd4 JK |
22769 | } |
22770 | ||
9aa1f1e3 TT |
22771 | /* Return the text offset of the CU. The returned offset comes from |
22772 | this CU's objfile. If this objfile came from a separate debuginfo | |
22773 | file, then the offset may be different from the corresponding | |
22774 | offset in the parent objfile. */ | |
22775 | ||
22776 | CORE_ADDR | |
22777 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
22778 | { | |
bb3fa9d0 | 22779 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
22780 | |
22781 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
22782 | } | |
22783 | ||
43988095 JK |
22784 | /* Return DWARF version number of PER_CU. */ |
22785 | ||
22786 | short | |
22787 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
22788 | { | |
22789 | return per_cu->dwarf_version; | |
22790 | } | |
22791 | ||
348e048f DE |
22792 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
22793 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
22794 | |
22795 | static struct dwarf2_per_cu_data * | |
9c541725 | 22796 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 22797 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
22798 | struct objfile *objfile) |
22799 | { | |
22800 | struct dwarf2_per_cu_data *this_cu; | |
22801 | int low, high; | |
36586728 | 22802 | const sect_offset *cu_off; |
ae038cb0 | 22803 | |
ae038cb0 DJ |
22804 | low = 0; |
22805 | high = dwarf2_per_objfile->n_comp_units - 1; | |
22806 | while (high > low) | |
22807 | { | |
36586728 | 22808 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 22809 | int mid = low + (high - low) / 2; |
9a619af0 | 22810 | |
36586728 | 22811 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
9c541725 | 22812 | cu_off = &mid_cu->sect_off; |
36586728 | 22813 | if (mid_cu->is_dwz > offset_in_dwz |
9c541725 | 22814 | || (mid_cu->is_dwz == offset_in_dwz && *cu_off >= sect_off)) |
ae038cb0 DJ |
22815 | high = mid; |
22816 | else | |
22817 | low = mid + 1; | |
22818 | } | |
22819 | gdb_assert (low == high); | |
36586728 | 22820 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
9c541725 PA |
22821 | cu_off = &this_cu->sect_off; |
22822 | if (this_cu->is_dwz != offset_in_dwz || *cu_off > sect_off) | |
ae038cb0 | 22823 | { |
36586728 | 22824 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 22825 | error (_("Dwarf Error: could not find partial DIE containing " |
9c541725 PA |
22826 | "offset 0x%x [in module %s]"), |
22827 | to_underlying (sect_off), bfd_get_filename (objfile->obfd)); | |
10b3939b | 22828 | |
9c541725 PA |
22829 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
22830 | <= sect_off); | |
ae038cb0 DJ |
22831 | return dwarf2_per_objfile->all_comp_units[low-1]; |
22832 | } | |
22833 | else | |
22834 | { | |
22835 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
22836 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
9c541725 PA |
22837 | && sect_off >= this_cu->sect_off + this_cu->length) |
22838 | error (_("invalid dwarf2 offset %u"), to_underlying (sect_off)); | |
22839 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); | |
ae038cb0 DJ |
22840 | return this_cu; |
22841 | } | |
22842 | } | |
22843 | ||
23745b47 | 22844 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 22845 | |
9816fde3 | 22846 | static void |
23745b47 | 22847 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 22848 | { |
9816fde3 | 22849 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
22850 | per_cu->cu = cu; |
22851 | cu->per_cu = per_cu; | |
22852 | cu->objfile = per_cu->objfile; | |
93311388 | 22853 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
22854 | } |
22855 | ||
22856 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
22857 | ||
22858 | static void | |
95554aad TT |
22859 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
22860 | enum language pretend_language) | |
9816fde3 JK |
22861 | { |
22862 | struct attribute *attr; | |
22863 | ||
22864 | /* Set the language we're debugging. */ | |
22865 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
22866 | if (attr) | |
22867 | set_cu_language (DW_UNSND (attr), cu); | |
22868 | else | |
9cded63f | 22869 | { |
95554aad | 22870 | cu->language = pretend_language; |
9cded63f TT |
22871 | cu->language_defn = language_def (cu->language); |
22872 | } | |
dee91e82 | 22873 | |
7d45c7c3 | 22874 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
22875 | } |
22876 | ||
ae038cb0 DJ |
22877 | /* Release one cached compilation unit, CU. We unlink it from the tree |
22878 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
22879 | the caller is responsible for that. |
22880 | NOTE: DATA is a void * because this function is also used as a | |
22881 | cleanup routine. */ | |
ae038cb0 DJ |
22882 | |
22883 | static void | |
68dc6402 | 22884 | free_heap_comp_unit (void *data) |
ae038cb0 | 22885 | { |
9a3c8263 | 22886 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
ae038cb0 | 22887 | |
23745b47 DE |
22888 | gdb_assert (cu->per_cu != NULL); |
22889 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
22890 | cu->per_cu = NULL; |
22891 | ||
22892 | obstack_free (&cu->comp_unit_obstack, NULL); | |
22893 | ||
22894 | xfree (cu); | |
22895 | } | |
22896 | ||
72bf9492 | 22897 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 22898 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 22899 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
22900 | |
22901 | static void | |
22902 | free_stack_comp_unit (void *data) | |
22903 | { | |
9a3c8263 | 22904 | struct dwarf2_cu *cu = (struct dwarf2_cu *) data; |
72bf9492 | 22905 | |
23745b47 DE |
22906 | gdb_assert (cu->per_cu != NULL); |
22907 | cu->per_cu->cu = NULL; | |
22908 | cu->per_cu = NULL; | |
22909 | ||
72bf9492 DJ |
22910 | obstack_free (&cu->comp_unit_obstack, NULL); |
22911 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
22912 | } |
22913 | ||
22914 | /* Free all cached compilation units. */ | |
22915 | ||
22916 | static void | |
22917 | free_cached_comp_units (void *data) | |
22918 | { | |
330cdd98 | 22919 | dwarf2_per_objfile->free_cached_comp_units (); |
ae038cb0 DJ |
22920 | } |
22921 | ||
22922 | /* Increase the age counter on each cached compilation unit, and free | |
22923 | any that are too old. */ | |
22924 | ||
22925 | static void | |
22926 | age_cached_comp_units (void) | |
22927 | { | |
22928 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22929 | ||
22930 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
22931 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22932 | while (per_cu != NULL) | |
22933 | { | |
22934 | per_cu->cu->last_used ++; | |
b4f54984 | 22935 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
22936 | dwarf2_mark (per_cu->cu); |
22937 | per_cu = per_cu->cu->read_in_chain; | |
22938 | } | |
22939 | ||
22940 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22941 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22942 | while (per_cu != NULL) | |
22943 | { | |
22944 | struct dwarf2_per_cu_data *next_cu; | |
22945 | ||
22946 | next_cu = per_cu->cu->read_in_chain; | |
22947 | ||
22948 | if (!per_cu->cu->mark) | |
22949 | { | |
68dc6402 | 22950 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
22951 | *last_chain = next_cu; |
22952 | } | |
22953 | else | |
22954 | last_chain = &per_cu->cu->read_in_chain; | |
22955 | ||
22956 | per_cu = next_cu; | |
22957 | } | |
22958 | } | |
22959 | ||
22960 | /* Remove a single compilation unit from the cache. */ | |
22961 | ||
22962 | static void | |
dee91e82 | 22963 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
22964 | { |
22965 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
22966 | ||
22967 | per_cu = dwarf2_per_objfile->read_in_chain; | |
22968 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
22969 | while (per_cu != NULL) | |
22970 | { | |
22971 | struct dwarf2_per_cu_data *next_cu; | |
22972 | ||
22973 | next_cu = per_cu->cu->read_in_chain; | |
22974 | ||
dee91e82 | 22975 | if (per_cu == target_per_cu) |
ae038cb0 | 22976 | { |
68dc6402 | 22977 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 22978 | per_cu->cu = NULL; |
ae038cb0 DJ |
22979 | *last_chain = next_cu; |
22980 | break; | |
22981 | } | |
22982 | else | |
22983 | last_chain = &per_cu->cu->read_in_chain; | |
22984 | ||
22985 | per_cu = next_cu; | |
22986 | } | |
22987 | } | |
22988 | ||
fe3e1990 DJ |
22989 | /* Release all extra memory associated with OBJFILE. */ |
22990 | ||
22991 | void | |
22992 | dwarf2_free_objfile (struct objfile *objfile) | |
22993 | { | |
9a3c8263 SM |
22994 | dwarf2_per_objfile |
22995 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
22996 | dwarf2_objfile_data_key); | |
fe3e1990 DJ |
22997 | |
22998 | if (dwarf2_per_objfile == NULL) | |
22999 | return; | |
23000 | ||
330cdd98 | 23001 | dwarf2_per_objfile->~dwarf2_per_objfile (); |
fe3e1990 DJ |
23002 | } |
23003 | ||
dee91e82 DE |
23004 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23005 | We store these in a hash table separate from the DIEs, and preserve them | |
23006 | when the DIEs are flushed out of cache. | |
23007 | ||
23008 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23009 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23010 | or the type may come from a DWO file. Furthermore, while it's more logical |
23011 | to use per_cu->section+offset, with Fission the section with the data is in | |
23012 | the DWO file but we don't know that section at the point we need it. | |
23013 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23014 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23015 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23016 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23017 | |
dee91e82 | 23018 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23019 | { |
dee91e82 | 23020 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23021 | sect_offset sect_off; |
1c379e20 DJ |
23022 | struct type *type; |
23023 | }; | |
23024 | ||
dee91e82 | 23025 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23026 | |
23027 | static hashval_t | |
dee91e82 | 23028 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23029 | { |
9a3c8263 SM |
23030 | const struct dwarf2_per_cu_offset_and_type *ofs |
23031 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23032 | |
9c541725 | 23033 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23034 | } |
23035 | ||
dee91e82 | 23036 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23037 | |
23038 | static int | |
dee91e82 | 23039 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23040 | { |
9a3c8263 SM |
23041 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23042 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23043 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23044 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23045 | |
dee91e82 | 23046 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23047 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23048 | } |
23049 | ||
23050 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23051 | table if necessary. For convenience, return TYPE. |
23052 | ||
23053 | The DIEs reading must have careful ordering to: | |
23054 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
23055 | reading current DIE. | |
23056 | * Not trying to dereference contents of still incompletely read in types | |
23057 | while reading in other DIEs. | |
23058 | * Enable referencing still incompletely read in types just by a pointer to | |
23059 | the type without accessing its fields. | |
23060 | ||
23061 | Therefore caller should follow these rules: | |
23062 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23063 | before building the type and calling set_die_type. | |
e71ec853 | 23064 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23065 | possible before fetching more types to complete the current type. |
23066 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23067 | |
f792889a | 23068 | static struct type * |
1c379e20 DJ |
23069 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23070 | { | |
dee91e82 | 23071 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 23072 | struct objfile *objfile = cu->objfile; |
3cdcd0ce JB |
23073 | struct attribute *attr; |
23074 | struct dynamic_prop prop; | |
1c379e20 | 23075 | |
b4ba55a1 JB |
23076 | /* For Ada types, make sure that the gnat-specific data is always |
23077 | initialized (if not already set). There are a few types where | |
23078 | we should not be doing so, because the type-specific area is | |
23079 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23080 | where the type-specific area is used to store the floatformat). | |
23081 | But this is not a problem, because the gnat-specific information | |
23082 | is actually not needed for these types. */ | |
23083 | if (need_gnat_info (cu) | |
23084 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23085 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23086 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23087 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23088 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23089 | && !HAVE_GNAT_AUX_INFO (type)) |
23090 | INIT_GNAT_SPECIFIC (type); | |
23091 | ||
3f2f83dd KB |
23092 | /* Read DW_AT_allocated and set in type. */ |
23093 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
23094 | if (attr_form_is_block (attr)) | |
23095 | { | |
23096 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23097 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type, objfile); | |
23098 | } | |
23099 | else if (attr != NULL) | |
23100 | { | |
23101 | complaint (&symfile_complaints, | |
9c541725 PA |
23102 | _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"), |
23103 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23104 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23105 | } |
23106 | ||
23107 | /* Read DW_AT_associated and set in type. */ | |
23108 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
23109 | if (attr_form_is_block (attr)) | |
23110 | { | |
23111 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
23112 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type, objfile); | |
23113 | } | |
23114 | else if (attr != NULL) | |
23115 | { | |
23116 | complaint (&symfile_complaints, | |
9c541725 PA |
23117 | _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"), |
23118 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), | |
23119 | to_underlying (die->sect_off)); | |
3f2f83dd KB |
23120 | } |
23121 | ||
3cdcd0ce JB |
23122 | /* Read DW_AT_data_location and set in type. */ |
23123 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
23124 | if (attr_to_dynamic_prop (attr, die, cu, &prop)) | |
93a8e227 | 23125 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type, objfile); |
3cdcd0ce | 23126 | |
dee91e82 | 23127 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23128 | { |
dee91e82 DE |
23129 | dwarf2_per_objfile->die_type_hash = |
23130 | htab_create_alloc_ex (127, | |
23131 | per_cu_offset_and_type_hash, | |
23132 | per_cu_offset_and_type_eq, | |
23133 | NULL, | |
23134 | &objfile->objfile_obstack, | |
23135 | hashtab_obstack_allocate, | |
23136 | dummy_obstack_deallocate); | |
f792889a | 23137 | } |
1c379e20 | 23138 | |
dee91e82 | 23139 | ofs.per_cu = cu->per_cu; |
9c541725 | 23140 | ofs.sect_off = die->sect_off; |
1c379e20 | 23141 | ofs.type = type; |
dee91e82 DE |
23142 | slot = (struct dwarf2_per_cu_offset_and_type **) |
23143 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
23144 | if (*slot) |
23145 | complaint (&symfile_complaints, | |
23146 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
9c541725 | 23147 | to_underlying (die->sect_off)); |
8d749320 SM |
23148 | *slot = XOBNEW (&objfile->objfile_obstack, |
23149 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23150 | **slot = ofs; |
f792889a | 23151 | return type; |
1c379e20 DJ |
23152 | } |
23153 | ||
9c541725 | 23154 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23155 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23156 | |
23157 | static struct type * | |
9c541725 | 23158 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23159 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23160 | { |
dee91e82 | 23161 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 23162 | |
dee91e82 | 23163 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23164 | return NULL; |
1c379e20 | 23165 | |
dee91e82 | 23166 | ofs.per_cu = per_cu; |
9c541725 | 23167 | ofs.sect_off = sect_off; |
9a3c8263 SM |
23168 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
23169 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
23170 | if (slot) |
23171 | return slot->type; | |
23172 | else | |
23173 | return NULL; | |
23174 | } | |
23175 | ||
02142a6c | 23176 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23177 | or return NULL if DIE does not have a saved type. */ |
23178 | ||
23179 | static struct type * | |
23180 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
23181 | { | |
9c541725 | 23182 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
23183 | } |
23184 | ||
10b3939b DJ |
23185 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
23186 | ||
23187 | static void | |
23188 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
23189 | struct dwarf2_per_cu_data *ref_per_cu) | |
23190 | { | |
23191 | void **slot; | |
23192 | ||
23193 | if (cu->dependencies == NULL) | |
23194 | cu->dependencies | |
23195 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
23196 | NULL, &cu->comp_unit_obstack, | |
23197 | hashtab_obstack_allocate, | |
23198 | dummy_obstack_deallocate); | |
23199 | ||
23200 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
23201 | if (*slot == NULL) | |
23202 | *slot = ref_per_cu; | |
23203 | } | |
1c379e20 | 23204 | |
f504f079 DE |
23205 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
23206 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
23207 | cache that we must keep because we are keeping CU. */ |
23208 | ||
10b3939b DJ |
23209 | static int |
23210 | dwarf2_mark_helper (void **slot, void *data) | |
23211 | { | |
23212 | struct dwarf2_per_cu_data *per_cu; | |
23213 | ||
23214 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
23215 | |
23216 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
23217 | reading of the chain. As such dependencies remain valid it is not much | |
23218 | useful to track and undo them during QUIT cleanups. */ | |
23219 | if (per_cu->cu == NULL) | |
23220 | return 1; | |
23221 | ||
10b3939b DJ |
23222 | if (per_cu->cu->mark) |
23223 | return 1; | |
23224 | per_cu->cu->mark = 1; | |
23225 | ||
23226 | if (per_cu->cu->dependencies != NULL) | |
23227 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
23228 | ||
23229 | return 1; | |
23230 | } | |
23231 | ||
f504f079 DE |
23232 | /* Set the mark field in CU and in every other compilation unit in the |
23233 | cache that we must keep because we are keeping CU. */ | |
23234 | ||
ae038cb0 DJ |
23235 | static void |
23236 | dwarf2_mark (struct dwarf2_cu *cu) | |
23237 | { | |
23238 | if (cu->mark) | |
23239 | return; | |
23240 | cu->mark = 1; | |
10b3939b DJ |
23241 | if (cu->dependencies != NULL) |
23242 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
23243 | } |
23244 | ||
23245 | static void | |
23246 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
23247 | { | |
23248 | while (per_cu) | |
23249 | { | |
23250 | per_cu->cu->mark = 0; | |
23251 | per_cu = per_cu->cu->read_in_chain; | |
23252 | } | |
72bf9492 DJ |
23253 | } |
23254 | ||
72bf9492 DJ |
23255 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
23256 | is its offset in .debug_info for this objfile. */ | |
23257 | ||
23258 | static hashval_t | |
23259 | partial_die_hash (const void *item) | |
23260 | { | |
9a3c8263 SM |
23261 | const struct partial_die_info *part_die |
23262 | = (const struct partial_die_info *) item; | |
9a619af0 | 23263 | |
9c541725 | 23264 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
23265 | } |
23266 | ||
23267 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
23268 | are equal if they have the same offset. */ | |
23269 | ||
23270 | static int | |
23271 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
23272 | { | |
9a3c8263 SM |
23273 | const struct partial_die_info *part_die_lhs |
23274 | = (const struct partial_die_info *) item_lhs; | |
23275 | const struct partial_die_info *part_die_rhs | |
23276 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 23277 | |
9c541725 | 23278 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
23279 | } |
23280 | ||
b4f54984 DE |
23281 | static struct cmd_list_element *set_dwarf_cmdlist; |
23282 | static struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
23283 | |
23284 | static void | |
b4f54984 | 23285 | set_dwarf_cmd (char *args, int from_tty) |
ae038cb0 | 23286 | { |
b4f54984 | 23287 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 23288 | gdb_stdout); |
ae038cb0 DJ |
23289 | } |
23290 | ||
23291 | static void | |
b4f54984 | 23292 | show_dwarf_cmd (char *args, int from_tty) |
6e70227d | 23293 | { |
b4f54984 | 23294 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
23295 | } |
23296 | ||
4bf44c1c | 23297 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
23298 | |
23299 | static void | |
c1bd65d0 | 23300 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc | 23301 | { |
9a3c8263 | 23302 | struct dwarf2_per_objfile *data = (struct dwarf2_per_objfile *) d; |
8b70b953 | 23303 | int ix; |
8b70b953 | 23304 | |
626f2d1c TT |
23305 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
23306 | cleaning up. */ | |
23307 | dwarf2_per_objfile = NULL; | |
23308 | ||
59b0c7c1 JB |
23309 | for (ix = 0; ix < data->n_comp_units; ++ix) |
23310 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 23311 | |
59b0c7c1 | 23312 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 23313 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
23314 | data->all_type_units[ix]->per_cu.imported_symtabs); |
23315 | xfree (data->all_type_units); | |
95554aad | 23316 | |
8b70b953 | 23317 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
23318 | |
23319 | if (data->dwo_files) | |
23320 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
23321 | if (data->dwp_file) |
23322 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
23323 | |
23324 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
23325 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
23326 | } |
23327 | ||
23328 | \f | |
ae2de4f8 | 23329 | /* The "save gdb-index" command. */ |
9291a0cd | 23330 | |
bc8f2430 JK |
23331 | /* In-memory buffer to prepare data to be written later to a file. */ |
23332 | class data_buf | |
9291a0cd | 23333 | { |
bc8f2430 | 23334 | public: |
bc8f2430 JK |
23335 | /* Copy DATA to the end of the buffer. */ |
23336 | template<typename T> | |
23337 | void append_data (const T &data) | |
23338 | { | |
23339 | std::copy (reinterpret_cast<const gdb_byte *> (&data), | |
23340 | reinterpret_cast<const gdb_byte *> (&data + 1), | |
c2f134ac | 23341 | grow (sizeof (data))); |
bc8f2430 | 23342 | } |
b89be57b | 23343 | |
c2f134ac PA |
23344 | /* Copy CSTR (a zero-terminated string) to the end of buffer. The |
23345 | terminating zero is appended too. */ | |
bc8f2430 JK |
23346 | void append_cstr0 (const char *cstr) |
23347 | { | |
23348 | const size_t size = strlen (cstr) + 1; | |
c2f134ac PA |
23349 | std::copy (cstr, cstr + size, grow (size)); |
23350 | } | |
23351 | ||
23352 | /* Accept a host-format integer in VAL and append it to the buffer | |
23353 | as a target-format integer which is LEN bytes long. */ | |
23354 | void append_uint (size_t len, bfd_endian byte_order, ULONGEST val) | |
23355 | { | |
23356 | ::store_unsigned_integer (grow (len), len, byte_order, val); | |
bc8f2430 | 23357 | } |
9291a0cd | 23358 | |
bc8f2430 JK |
23359 | /* Return the size of the buffer. */ |
23360 | size_t size () const | |
23361 | { | |
23362 | return m_vec.size (); | |
23363 | } | |
23364 | ||
23365 | /* Write the buffer to FILE. */ | |
23366 | void file_write (FILE *file) const | |
23367 | { | |
a81e6d4d PA |
23368 | if (::fwrite (m_vec.data (), 1, m_vec.size (), file) != m_vec.size ()) |
23369 | error (_("couldn't write data to file")); | |
bc8f2430 JK |
23370 | } |
23371 | ||
23372 | private: | |
c2f134ac PA |
23373 | /* Grow SIZE bytes at the end of the buffer. Returns a pointer to |
23374 | the start of the new block. */ | |
23375 | gdb_byte *grow (size_t size) | |
23376 | { | |
23377 | m_vec.resize (m_vec.size () + size); | |
23378 | return &*m_vec.end () - size; | |
23379 | } | |
23380 | ||
d5722aa2 | 23381 | gdb::byte_vector m_vec; |
bc8f2430 | 23382 | }; |
9291a0cd TT |
23383 | |
23384 | /* An entry in the symbol table. */ | |
23385 | struct symtab_index_entry | |
23386 | { | |
23387 | /* The name of the symbol. */ | |
23388 | const char *name; | |
23389 | /* The offset of the name in the constant pool. */ | |
23390 | offset_type index_offset; | |
23391 | /* A sorted vector of the indices of all the CUs that hold an object | |
23392 | of this name. */ | |
bc8f2430 | 23393 | std::vector<offset_type> cu_indices; |
9291a0cd TT |
23394 | }; |
23395 | ||
23396 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
23397 | struct mapped_symtab | |
23398 | { | |
bc8f2430 JK |
23399 | mapped_symtab () |
23400 | { | |
23401 | data.resize (1024); | |
23402 | } | |
b89be57b | 23403 | |
bc8f2430 | 23404 | offset_type n_elements = 0; |
4b76cda9 | 23405 | std::vector<symtab_index_entry> data; |
bc8f2430 | 23406 | }; |
9291a0cd | 23407 | |
bc8f2430 | 23408 | /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to |
559a7a62 JK |
23409 | the slot. |
23410 | ||
23411 | Function is used only during write_hash_table so no index format backward | |
23412 | compatibility is needed. */ | |
b89be57b | 23413 | |
4b76cda9 | 23414 | static symtab_index_entry & |
9291a0cd TT |
23415 | find_slot (struct mapped_symtab *symtab, const char *name) |
23416 | { | |
559a7a62 | 23417 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd | 23418 | |
bc8f2430 JK |
23419 | index = hash & (symtab->data.size () - 1); |
23420 | step = ((hash * 17) & (symtab->data.size () - 1)) | 1; | |
9291a0cd TT |
23421 | |
23422 | for (;;) | |
23423 | { | |
4b76cda9 PA |
23424 | if (symtab->data[index].name == NULL |
23425 | || strcmp (name, symtab->data[index].name) == 0) | |
bc8f2430 JK |
23426 | return symtab->data[index]; |
23427 | index = (index + step) & (symtab->data.size () - 1); | |
9291a0cd TT |
23428 | } |
23429 | } | |
23430 | ||
23431 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 23432 | |
9291a0cd TT |
23433 | static void |
23434 | hash_expand (struct mapped_symtab *symtab) | |
23435 | { | |
bc8f2430 | 23436 | auto old_entries = std::move (symtab->data); |
9291a0cd | 23437 | |
bc8f2430 JK |
23438 | symtab->data.clear (); |
23439 | symtab->data.resize (old_entries.size () * 2); | |
9291a0cd | 23440 | |
bc8f2430 | 23441 | for (auto &it : old_entries) |
4b76cda9 | 23442 | if (it.name != NULL) |
bc8f2430 | 23443 | { |
4b76cda9 | 23444 | auto &ref = find_slot (symtab, it.name); |
bc8f2430 JK |
23445 | ref = std::move (it); |
23446 | } | |
9291a0cd TT |
23447 | } |
23448 | ||
156942c7 DE |
23449 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
23450 | CU_INDEX is the index of the CU in which the symbol appears. | |
23451 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 23452 | |
9291a0cd TT |
23453 | static void |
23454 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 23455 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
23456 | offset_type cu_index) |
23457 | { | |
156942c7 | 23458 | offset_type cu_index_and_attrs; |
9291a0cd TT |
23459 | |
23460 | ++symtab->n_elements; | |
bc8f2430 | 23461 | if (4 * symtab->n_elements / 3 >= symtab->data.size ()) |
9291a0cd TT |
23462 | hash_expand (symtab); |
23463 | ||
4b76cda9 PA |
23464 | symtab_index_entry &slot = find_slot (symtab, name); |
23465 | if (slot.name == NULL) | |
9291a0cd | 23466 | { |
4b76cda9 | 23467 | slot.name = name; |
156942c7 | 23468 | /* index_offset is set later. */ |
9291a0cd | 23469 | } |
156942c7 DE |
23470 | |
23471 | cu_index_and_attrs = 0; | |
23472 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
23473 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
23474 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
23475 | ||
23476 | /* We don't want to record an index value twice as we want to avoid the | |
23477 | duplication. | |
23478 | We process all global symbols and then all static symbols | |
23479 | (which would allow us to avoid the duplication by only having to check | |
23480 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
23481 | To keep things simple we don't worry about the duplication here and | |
23482 | sort and uniqufy the list after we've processed all symbols. */ | |
4b76cda9 | 23483 | slot.cu_indices.push_back (cu_index_and_attrs); |
156942c7 DE |
23484 | } |
23485 | ||
23486 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
23487 | ||
23488 | static void | |
23489 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
23490 | { | |
4b76cda9 | 23491 | for (auto &entry : symtab->data) |
156942c7 | 23492 | { |
4b76cda9 | 23493 | if (entry.name != NULL && !entry.cu_indices.empty ()) |
156942c7 | 23494 | { |
4b76cda9 | 23495 | auto &cu_indices = entry.cu_indices; |
6fd931f2 PA |
23496 | std::sort (cu_indices.begin (), cu_indices.end ()); |
23497 | auto from = std::unique (cu_indices.begin (), cu_indices.end ()); | |
23498 | cu_indices.erase (from, cu_indices.end ()); | |
156942c7 DE |
23499 | } |
23500 | } | |
9291a0cd TT |
23501 | } |
23502 | ||
bc8f2430 JK |
23503 | /* A form of 'const char *' suitable for container keys. Only the |
23504 | pointer is stored. The strings themselves are compared, not the | |
23505 | pointers. */ | |
23506 | class c_str_view | |
9291a0cd | 23507 | { |
bc8f2430 JK |
23508 | public: |
23509 | c_str_view (const char *cstr) | |
23510 | : m_cstr (cstr) | |
23511 | {} | |
9291a0cd | 23512 | |
bc8f2430 JK |
23513 | bool operator== (const c_str_view &other) const |
23514 | { | |
23515 | return strcmp (m_cstr, other.m_cstr) == 0; | |
23516 | } | |
9291a0cd | 23517 | |
bc8f2430 JK |
23518 | private: |
23519 | friend class c_str_view_hasher; | |
23520 | const char *const m_cstr; | |
23521 | }; | |
9291a0cd | 23522 | |
bc8f2430 JK |
23523 | /* A std::unordered_map::hasher for c_str_view that uses the right |
23524 | hash function for strings in a mapped index. */ | |
23525 | class c_str_view_hasher | |
23526 | { | |
23527 | public: | |
23528 | size_t operator () (const c_str_view &x) const | |
23529 | { | |
23530 | return mapped_index_string_hash (INT_MAX, x.m_cstr); | |
23531 | } | |
23532 | }; | |
b89be57b | 23533 | |
bc8f2430 JK |
23534 | /* A std::unordered_map::hasher for std::vector<>. */ |
23535 | template<typename T> | |
23536 | class vector_hasher | |
9291a0cd | 23537 | { |
bc8f2430 JK |
23538 | public: |
23539 | size_t operator () (const std::vector<T> &key) const | |
23540 | { | |
23541 | return iterative_hash (key.data (), | |
23542 | sizeof (key.front ()) * key.size (), 0); | |
23543 | } | |
23544 | }; | |
9291a0cd | 23545 | |
bc8f2430 JK |
23546 | /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with |
23547 | constant pool entries going into the data buffer CPOOL. */ | |
3876f04e | 23548 | |
bc8f2430 JK |
23549 | static void |
23550 | write_hash_table (mapped_symtab *symtab, data_buf &output, data_buf &cpool) | |
23551 | { | |
23552 | { | |
23553 | /* Elements are sorted vectors of the indices of all the CUs that | |
23554 | hold an object of this name. */ | |
23555 | std::unordered_map<std::vector<offset_type>, offset_type, | |
23556 | vector_hasher<offset_type>> | |
23557 | symbol_hash_table; | |
23558 | ||
23559 | /* We add all the index vectors to the constant pool first, to | |
23560 | ensure alignment is ok. */ | |
4b76cda9 | 23561 | for (symtab_index_entry &entry : symtab->data) |
bc8f2430 | 23562 | { |
4b76cda9 | 23563 | if (entry.name == NULL) |
bc8f2430 | 23564 | continue; |
4b76cda9 | 23565 | gdb_assert (entry.index_offset == 0); |
70a1152b PA |
23566 | |
23567 | /* Finding before inserting is faster than always trying to | |
23568 | insert, because inserting always allocates a node, does the | |
23569 | lookup, and then destroys the new node if another node | |
23570 | already had the same key. C++17 try_emplace will avoid | |
23571 | this. */ | |
23572 | const auto found | |
4b76cda9 | 23573 | = symbol_hash_table.find (entry.cu_indices); |
70a1152b PA |
23574 | if (found != symbol_hash_table.end ()) |
23575 | { | |
4b76cda9 | 23576 | entry.index_offset = found->second; |
70a1152b PA |
23577 | continue; |
23578 | } | |
23579 | ||
4b76cda9 PA |
23580 | symbol_hash_table.emplace (entry.cu_indices, cpool.size ()); |
23581 | entry.index_offset = cpool.size (); | |
23582 | cpool.append_data (MAYBE_SWAP (entry.cu_indices.size ())); | |
23583 | for (const auto index : entry.cu_indices) | |
23584 | cpool.append_data (MAYBE_SWAP (index)); | |
bc8f2430 JK |
23585 | } |
23586 | } | |
9291a0cd TT |
23587 | |
23588 | /* Now write out the hash table. */ | |
bc8f2430 | 23589 | std::unordered_map<c_str_view, offset_type, c_str_view_hasher> str_table; |
4b76cda9 | 23590 | for (const auto &entry : symtab->data) |
9291a0cd TT |
23591 | { |
23592 | offset_type str_off, vec_off; | |
23593 | ||
4b76cda9 | 23594 | if (entry.name != NULL) |
9291a0cd | 23595 | { |
4b76cda9 | 23596 | const auto insertpair = str_table.emplace (entry.name, cpool.size ()); |
bc8f2430 | 23597 | if (insertpair.second) |
4b76cda9 | 23598 | cpool.append_cstr0 (entry.name); |
bc8f2430 | 23599 | str_off = insertpair.first->second; |
4b76cda9 | 23600 | vec_off = entry.index_offset; |
9291a0cd TT |
23601 | } |
23602 | else | |
23603 | { | |
23604 | /* While 0 is a valid constant pool index, it is not valid | |
23605 | to have 0 for both offsets. */ | |
23606 | str_off = 0; | |
23607 | vec_off = 0; | |
23608 | } | |
23609 | ||
bc8f2430 JK |
23610 | output.append_data (MAYBE_SWAP (str_off)); |
23611 | output.append_data (MAYBE_SWAP (vec_off)); | |
9291a0cd | 23612 | } |
9291a0cd TT |
23613 | } |
23614 | ||
bc8f2430 | 23615 | typedef std::unordered_map<partial_symtab *, unsigned int> psym_index_map; |
0a5429f6 DE |
23616 | |
23617 | /* Helper struct for building the address table. */ | |
23618 | struct addrmap_index_data | |
23619 | { | |
bc8f2430 JK |
23620 | addrmap_index_data (data_buf &addr_vec_, psym_index_map &cu_index_htab_) |
23621 | : addr_vec (addr_vec_), cu_index_htab (cu_index_htab_) | |
23622 | {} | |
23623 | ||
0a5429f6 | 23624 | struct objfile *objfile; |
bc8f2430 JK |
23625 | data_buf &addr_vec; |
23626 | psym_index_map &cu_index_htab; | |
0a5429f6 DE |
23627 | |
23628 | /* Non-zero if the previous_* fields are valid. | |
23629 | We can't write an entry until we see the next entry (since it is only then | |
23630 | that we know the end of the entry). */ | |
23631 | int previous_valid; | |
23632 | /* Index of the CU in the table of all CUs in the index file. */ | |
23633 | unsigned int previous_cu_index; | |
0963b4bd | 23634 | /* Start address of the CU. */ |
0a5429f6 DE |
23635 | CORE_ADDR previous_cu_start; |
23636 | }; | |
23637 | ||
bc8f2430 | 23638 | /* Write an address entry to ADDR_VEC. */ |
b89be57b | 23639 | |
9291a0cd | 23640 | static void |
bc8f2430 | 23641 | add_address_entry (struct objfile *objfile, data_buf &addr_vec, |
0a5429f6 | 23642 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) |
9291a0cd | 23643 | { |
9291a0cd TT |
23644 | CORE_ADDR baseaddr; |
23645 | ||
23646 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
23647 | ||
c2f134ac PA |
23648 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, start - baseaddr); |
23649 | addr_vec.append_uint (8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
bc8f2430 | 23650 | addr_vec.append_data (MAYBE_SWAP (cu_index)); |
0a5429f6 DE |
23651 | } |
23652 | ||
23653 | /* Worker function for traversing an addrmap to build the address table. */ | |
23654 | ||
23655 | static int | |
23656 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
23657 | { | |
9a3c8263 SM |
23658 | struct addrmap_index_data *data = (struct addrmap_index_data *) datap; |
23659 | struct partial_symtab *pst = (struct partial_symtab *) obj; | |
0a5429f6 DE |
23660 | |
23661 | if (data->previous_valid) | |
bc8f2430 | 23662 | add_address_entry (data->objfile, data->addr_vec, |
0a5429f6 DE |
23663 | data->previous_cu_start, start_addr, |
23664 | data->previous_cu_index); | |
23665 | ||
23666 | data->previous_cu_start = start_addr; | |
23667 | if (pst != NULL) | |
23668 | { | |
bc8f2430 JK |
23669 | const auto it = data->cu_index_htab.find (pst); |
23670 | gdb_assert (it != data->cu_index_htab.cend ()); | |
23671 | data->previous_cu_index = it->second; | |
0a5429f6 DE |
23672 | data->previous_valid = 1; |
23673 | } | |
23674 | else | |
bc8f2430 | 23675 | data->previous_valid = 0; |
0a5429f6 DE |
23676 | |
23677 | return 0; | |
23678 | } | |
23679 | ||
bc8f2430 | 23680 | /* Write OBJFILE's address map to ADDR_VEC. |
0a5429f6 DE |
23681 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices |
23682 | in the index file. */ | |
23683 | ||
23684 | static void | |
bc8f2430 JK |
23685 | write_address_map (struct objfile *objfile, data_buf &addr_vec, |
23686 | psym_index_map &cu_index_htab) | |
0a5429f6 | 23687 | { |
bc8f2430 | 23688 | struct addrmap_index_data addrmap_index_data (addr_vec, cu_index_htab); |
0a5429f6 DE |
23689 | |
23690 | /* When writing the address table, we have to cope with the fact that | |
23691 | the addrmap iterator only provides the start of a region; we have to | |
23692 | wait until the next invocation to get the start of the next region. */ | |
23693 | ||
23694 | addrmap_index_data.objfile = objfile; | |
0a5429f6 DE |
23695 | addrmap_index_data.previous_valid = 0; |
23696 | ||
23697 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
23698 | &addrmap_index_data); | |
23699 | ||
23700 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
23701 | is valid, but we should still handle it. | |
23702 | The end address is recorded as the start of the next region, but that | |
23703 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
23704 | anyway. */ | |
23705 | if (addrmap_index_data.previous_valid) | |
bc8f2430 | 23706 | add_address_entry (objfile, addr_vec, |
0a5429f6 DE |
23707 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, |
23708 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
23709 | } |
23710 | ||
156942c7 DE |
23711 | /* Return the symbol kind of PSYM. */ |
23712 | ||
23713 | static gdb_index_symbol_kind | |
23714 | symbol_kind (struct partial_symbol *psym) | |
23715 | { | |
23716 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
23717 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
23718 | ||
23719 | switch (domain) | |
23720 | { | |
23721 | case VAR_DOMAIN: | |
23722 | switch (aclass) | |
23723 | { | |
23724 | case LOC_BLOCK: | |
23725 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
23726 | case LOC_TYPEDEF: | |
23727 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23728 | case LOC_COMPUTED: | |
23729 | case LOC_CONST_BYTES: | |
23730 | case LOC_OPTIMIZED_OUT: | |
23731 | case LOC_STATIC: | |
23732 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23733 | case LOC_CONST: | |
23734 | /* Note: It's currently impossible to recognize psyms as enum values | |
23735 | short of reading the type info. For now punt. */ | |
23736 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
23737 | default: | |
23738 | /* There are other LOC_FOO values that one might want to classify | |
23739 | as variables, but dwarf2read.c doesn't currently use them. */ | |
23740 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23741 | } | |
23742 | case STRUCT_DOMAIN: | |
23743 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
23744 | default: | |
23745 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
23746 | } | |
23747 | } | |
23748 | ||
9291a0cd | 23749 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 23750 | |
9291a0cd TT |
23751 | static void |
23752 | write_psymbols (struct mapped_symtab *symtab, | |
bc8f2430 | 23753 | std::unordered_set<partial_symbol *> &psyms_seen, |
9291a0cd TT |
23754 | struct partial_symbol **psymp, |
23755 | int count, | |
987d643c TT |
23756 | offset_type cu_index, |
23757 | int is_static) | |
9291a0cd TT |
23758 | { |
23759 | for (; count-- > 0; ++psymp) | |
23760 | { | |
156942c7 | 23761 | struct partial_symbol *psym = *psymp; |
987d643c | 23762 | |
156942c7 | 23763 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 23764 | error (_("Ada is not currently supported by the index")); |
987d643c | 23765 | |
987d643c | 23766 | /* Only add a given psymbol once. */ |
bc8f2430 | 23767 | if (psyms_seen.insert (psym).second) |
987d643c | 23768 | { |
156942c7 DE |
23769 | gdb_index_symbol_kind kind = symbol_kind (psym); |
23770 | ||
156942c7 DE |
23771 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), |
23772 | is_static, kind, cu_index); | |
987d643c | 23773 | } |
9291a0cd TT |
23774 | } |
23775 | } | |
23776 | ||
1fd400ff TT |
23777 | /* A helper struct used when iterating over debug_types. */ |
23778 | struct signatured_type_index_data | |
23779 | { | |
bc8f2430 JK |
23780 | signatured_type_index_data (data_buf &types_list_, |
23781 | std::unordered_set<partial_symbol *> &psyms_seen_) | |
23782 | : types_list (types_list_), psyms_seen (psyms_seen_) | |
23783 | {} | |
23784 | ||
1fd400ff TT |
23785 | struct objfile *objfile; |
23786 | struct mapped_symtab *symtab; | |
bc8f2430 JK |
23787 | data_buf &types_list; |
23788 | std::unordered_set<partial_symbol *> &psyms_seen; | |
1fd400ff TT |
23789 | int cu_index; |
23790 | }; | |
23791 | ||
23792 | /* A helper function that writes a single signatured_type to an | |
23793 | obstack. */ | |
b89be57b | 23794 | |
1fd400ff TT |
23795 | static int |
23796 | write_one_signatured_type (void **slot, void *d) | |
23797 | { | |
9a3c8263 SM |
23798 | struct signatured_type_index_data *info |
23799 | = (struct signatured_type_index_data *) d; | |
1fd400ff | 23800 | struct signatured_type *entry = (struct signatured_type *) *slot; |
0186c6a7 | 23801 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
23802 | |
23803 | write_psymbols (info->symtab, | |
987d643c | 23804 | info->psyms_seen, |
3e43a32a MS |
23805 | info->objfile->global_psymbols.list |
23806 | + psymtab->globals_offset, | |
987d643c TT |
23807 | psymtab->n_global_syms, info->cu_index, |
23808 | 0); | |
1fd400ff | 23809 | write_psymbols (info->symtab, |
987d643c | 23810 | info->psyms_seen, |
3e43a32a MS |
23811 | info->objfile->static_psymbols.list |
23812 | + psymtab->statics_offset, | |
987d643c TT |
23813 | psymtab->n_static_syms, info->cu_index, |
23814 | 1); | |
1fd400ff | 23815 | |
c2f134ac PA |
23816 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, |
23817 | to_underlying (entry->per_cu.sect_off)); | |
23818 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, | |
23819 | to_underlying (entry->type_offset_in_tu)); | |
23820 | info->types_list.append_uint (8, BFD_ENDIAN_LITTLE, entry->signature); | |
1fd400ff TT |
23821 | |
23822 | ++info->cu_index; | |
23823 | ||
23824 | return 1; | |
23825 | } | |
23826 | ||
e8f8bcb3 PA |
23827 | /* Recurse into all "included" dependencies and count their symbols as |
23828 | if they appeared in this psymtab. */ | |
23829 | ||
23830 | static void | |
23831 | recursively_count_psymbols (struct partial_symtab *psymtab, | |
23832 | size_t &psyms_seen) | |
23833 | { | |
23834 | for (int i = 0; i < psymtab->number_of_dependencies; ++i) | |
23835 | if (psymtab->dependencies[i]->user != NULL) | |
23836 | recursively_count_psymbols (psymtab->dependencies[i], | |
23837 | psyms_seen); | |
23838 | ||
23839 | psyms_seen += psymtab->n_global_syms; | |
23840 | psyms_seen += psymtab->n_static_syms; | |
23841 | } | |
23842 | ||
95554aad TT |
23843 | /* Recurse into all "included" dependencies and write their symbols as |
23844 | if they appeared in this psymtab. */ | |
23845 | ||
23846 | static void | |
23847 | recursively_write_psymbols (struct objfile *objfile, | |
23848 | struct partial_symtab *psymtab, | |
23849 | struct mapped_symtab *symtab, | |
bc8f2430 | 23850 | std::unordered_set<partial_symbol *> &psyms_seen, |
95554aad TT |
23851 | offset_type cu_index) |
23852 | { | |
23853 | int i; | |
23854 | ||
23855 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
23856 | if (psymtab->dependencies[i]->user != NULL) | |
23857 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
23858 | symtab, psyms_seen, cu_index); | |
23859 | ||
23860 | write_psymbols (symtab, | |
23861 | psyms_seen, | |
23862 | objfile->global_psymbols.list + psymtab->globals_offset, | |
23863 | psymtab->n_global_syms, cu_index, | |
23864 | 0); | |
23865 | write_psymbols (symtab, | |
23866 | psyms_seen, | |
23867 | objfile->static_psymbols.list + psymtab->statics_offset, | |
23868 | psymtab->n_static_syms, cu_index, | |
23869 | 1); | |
23870 | } | |
23871 | ||
9291a0cd | 23872 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 23873 | |
9291a0cd TT |
23874 | static void |
23875 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
23876 | { | |
9291a0cd TT |
23877 | if (dwarf2_per_objfile->using_index) |
23878 | error (_("Cannot use an index to create the index")); | |
23879 | ||
8b70b953 TT |
23880 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
23881 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
23882 | ||
260b681b DE |
23883 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
23884 | return; | |
23885 | ||
bc8f2430 | 23886 | struct stat st; |
4262abfb JK |
23887 | if (stat (objfile_name (objfile), &st) < 0) |
23888 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 23889 | |
bc8f2430 JK |
23890 | std::string filename (std::string (dir) + SLASH_STRING |
23891 | + lbasename (objfile_name (objfile)) + INDEX_SUFFIX); | |
9291a0cd | 23892 | |
d419f42d | 23893 | FILE *out_file = gdb_fopen_cloexec (filename.c_str (), "wb").release (); |
9291a0cd | 23894 | if (!out_file) |
bc8f2430 | 23895 | error (_("Can't open `%s' for writing"), filename.c_str ()); |
9291a0cd | 23896 | |
16b7a719 PA |
23897 | /* Order matters here; we want FILE to be closed before FILENAME is |
23898 | unlinked, because on MS-Windows one cannot delete a file that is | |
23899 | still open. (Don't call anything here that might throw until | |
23900 | file_closer is created.) */ | |
bc8f2430 | 23901 | gdb::unlinker unlink_file (filename.c_str ()); |
d419f42d | 23902 | gdb_file_up close_out_file (out_file); |
9291a0cd | 23903 | |
bc8f2430 JK |
23904 | mapped_symtab symtab; |
23905 | data_buf cu_list; | |
987d643c | 23906 | |
0a5429f6 DE |
23907 | /* While we're scanning CU's create a table that maps a psymtab pointer |
23908 | (which is what addrmap records) to its index (which is what is recorded | |
23909 | in the index file). This will later be needed to write the address | |
23910 | table. */ | |
bc8f2430 JK |
23911 | psym_index_map cu_index_htab; |
23912 | cu_index_htab.reserve (dwarf2_per_objfile->n_comp_units); | |
0a5429f6 DE |
23913 | |
23914 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
23915 | work here. Also, the debug_types entries do not appear in |
23916 | all_comp_units, but only in their own hash table. */ | |
e8f8bcb3 PA |
23917 | |
23918 | /* The psyms_seen set is potentially going to be largish (~40k | |
23919 | elements when indexing a -g3 build of GDB itself). Estimate the | |
23920 | number of elements in order to avoid too many rehashes, which | |
23921 | require rebuilding buckets and thus many trips to | |
23922 | malloc/free. */ | |
23923 | size_t psyms_count = 0; | |
23924 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
23925 | { | |
23926 | struct dwarf2_per_cu_data *per_cu | |
23927 | = dwarf2_per_objfile->all_comp_units[i]; | |
23928 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
23929 | ||
23930 | if (psymtab != NULL && psymtab->user == NULL) | |
23931 | recursively_count_psymbols (psymtab, psyms_count); | |
23932 | } | |
23933 | /* Generating an index for gdb itself shows a ratio of | |
23934 | TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */ | |
23935 | std::unordered_set<partial_symbol *> psyms_seen (psyms_count / 4); | |
bc8f2430 | 23936 | for (int i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd | 23937 | { |
3e43a32a MS |
23938 | struct dwarf2_per_cu_data *per_cu |
23939 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 23940 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 23941 | |
92fac807 JK |
23942 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
23943 | It may be referenced from a local scope but in such case it does not | |
23944 | need to be present in .gdb_index. */ | |
23945 | if (psymtab == NULL) | |
23946 | continue; | |
23947 | ||
95554aad | 23948 | if (psymtab->user == NULL) |
bc8f2430 JK |
23949 | recursively_write_psymbols (objfile, psymtab, &symtab, |
23950 | psyms_seen, i); | |
9291a0cd | 23951 | |
bc8f2430 JK |
23952 | const auto insertpair = cu_index_htab.emplace (psymtab, i); |
23953 | gdb_assert (insertpair.second); | |
9291a0cd | 23954 | |
c2f134ac PA |
23955 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, |
23956 | to_underlying (per_cu->sect_off)); | |
23957 | cu_list.append_uint (8, BFD_ENDIAN_LITTLE, per_cu->length); | |
9291a0cd TT |
23958 | } |
23959 | ||
0a5429f6 | 23960 | /* Dump the address map. */ |
bc8f2430 JK |
23961 | data_buf addr_vec; |
23962 | write_address_map (objfile, addr_vec, cu_index_htab); | |
0a5429f6 | 23963 | |
1fd400ff | 23964 | /* Write out the .debug_type entries, if any. */ |
bc8f2430 | 23965 | data_buf types_cu_list; |
1fd400ff TT |
23966 | if (dwarf2_per_objfile->signatured_types) |
23967 | { | |
bc8f2430 JK |
23968 | signatured_type_index_data sig_data (types_cu_list, |
23969 | psyms_seen); | |
1fd400ff TT |
23970 | |
23971 | sig_data.objfile = objfile; | |
bc8f2430 | 23972 | sig_data.symtab = &symtab; |
1fd400ff TT |
23973 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
23974 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
23975 | write_one_signatured_type, &sig_data); | |
23976 | } | |
23977 | ||
156942c7 DE |
23978 | /* Now that we've processed all symbols we can shrink their cu_indices |
23979 | lists. */ | |
bc8f2430 | 23980 | uniquify_cu_indices (&symtab); |
156942c7 | 23981 | |
bc8f2430 JK |
23982 | data_buf symtab_vec, constant_pool; |
23983 | write_hash_table (&symtab, symtab_vec, constant_pool); | |
9291a0cd | 23984 | |
bc8f2430 JK |
23985 | data_buf contents; |
23986 | const offset_type size_of_contents = 6 * sizeof (offset_type); | |
23987 | offset_type total_len = size_of_contents; | |
9291a0cd TT |
23988 | |
23989 | /* The version number. */ | |
bc8f2430 | 23990 | contents.append_data (MAYBE_SWAP (8)); |
9291a0cd TT |
23991 | |
23992 | /* The offset of the CU list from the start of the file. */ | |
bc8f2430 JK |
23993 | contents.append_data (MAYBE_SWAP (total_len)); |
23994 | total_len += cu_list.size (); | |
9291a0cd | 23995 | |
1fd400ff | 23996 | /* The offset of the types CU list from the start of the file. */ |
bc8f2430 JK |
23997 | contents.append_data (MAYBE_SWAP (total_len)); |
23998 | total_len += types_cu_list.size (); | |
1fd400ff | 23999 | |
9291a0cd | 24000 | /* The offset of the address table from the start of the file. */ |
bc8f2430 JK |
24001 | contents.append_data (MAYBE_SWAP (total_len)); |
24002 | total_len += addr_vec.size (); | |
9291a0cd TT |
24003 | |
24004 | /* The offset of the symbol table from the start of the file. */ | |
bc8f2430 JK |
24005 | contents.append_data (MAYBE_SWAP (total_len)); |
24006 | total_len += symtab_vec.size (); | |
9291a0cd TT |
24007 | |
24008 | /* The offset of the constant pool from the start of the file. */ | |
bc8f2430 JK |
24009 | contents.append_data (MAYBE_SWAP (total_len)); |
24010 | total_len += constant_pool.size (); | |
9291a0cd | 24011 | |
bc8f2430 | 24012 | gdb_assert (contents.size () == size_of_contents); |
9291a0cd | 24013 | |
bc8f2430 JK |
24014 | contents.file_write (out_file); |
24015 | cu_list.file_write (out_file); | |
24016 | types_cu_list.file_write (out_file); | |
24017 | addr_vec.file_write (out_file); | |
24018 | symtab_vec.file_write (out_file); | |
24019 | constant_pool.file_write (out_file); | |
9291a0cd | 24020 | |
bef155c3 TT |
24021 | /* We want to keep the file. */ |
24022 | unlink_file.keep (); | |
9291a0cd TT |
24023 | } |
24024 | ||
90476074 TT |
24025 | /* Implementation of the `save gdb-index' command. |
24026 | ||
24027 | Note that the file format used by this command is documented in the | |
24028 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 24029 | |
9291a0cd TT |
24030 | static void |
24031 | save_gdb_index_command (char *arg, int from_tty) | |
24032 | { | |
24033 | struct objfile *objfile; | |
24034 | ||
24035 | if (!arg || !*arg) | |
96d19272 | 24036 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
24037 | |
24038 | ALL_OBJFILES (objfile) | |
24039 | { | |
24040 | struct stat st; | |
24041 | ||
24042 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 24043 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
24044 | continue; |
24045 | ||
9a3c8263 SM |
24046 | dwarf2_per_objfile |
24047 | = (struct dwarf2_per_objfile *) objfile_data (objfile, | |
24048 | dwarf2_objfile_data_key); | |
9291a0cd TT |
24049 | if (dwarf2_per_objfile) |
24050 | { | |
9291a0cd | 24051 | |
492d29ea | 24052 | TRY |
9291a0cd TT |
24053 | { |
24054 | write_psymtabs_to_index (objfile, arg); | |
24055 | } | |
492d29ea PA |
24056 | CATCH (except, RETURN_MASK_ERROR) |
24057 | { | |
24058 | exception_fprintf (gdb_stderr, except, | |
24059 | _("Error while writing index for `%s': "), | |
24060 | objfile_name (objfile)); | |
24061 | } | |
24062 | END_CATCH | |
9291a0cd TT |
24063 | } |
24064 | } | |
dce234bc PP |
24065 | } |
24066 | ||
9291a0cd TT |
24067 | \f |
24068 | ||
b4f54984 | 24069 | int dwarf_always_disassemble; |
9eae7c52 TT |
24070 | |
24071 | static void | |
b4f54984 DE |
24072 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
24073 | struct cmd_list_element *c, const char *value) | |
9eae7c52 | 24074 | { |
3e43a32a MS |
24075 | fprintf_filtered (file, |
24076 | _("Whether to always disassemble " | |
24077 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
24078 | value); |
24079 | } | |
24080 | ||
900e11f9 JK |
24081 | static void |
24082 | show_check_physname (struct ui_file *file, int from_tty, | |
24083 | struct cmd_list_element *c, const char *value) | |
24084 | { | |
24085 | fprintf_filtered (file, | |
24086 | _("Whether to check \"physname\" is %s.\n"), | |
24087 | value); | |
24088 | } | |
24089 | ||
6502dd73 DJ |
24090 | void |
24091 | _initialize_dwarf2_read (void) | |
24092 | { | |
96d19272 JK |
24093 | struct cmd_list_element *c; |
24094 | ||
dce234bc | 24095 | dwarf2_objfile_data_key |
c1bd65d0 | 24096 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 24097 | |
b4f54984 DE |
24098 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
24099 | Set DWARF specific variables.\n\ | |
24100 | Configure DWARF variables such as the cache size"), | |
24101 | &set_dwarf_cmdlist, "maintenance set dwarf ", | |
ae038cb0 DJ |
24102 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
24103 | ||
b4f54984 DE |
24104 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
24105 | Show DWARF specific variables\n\ | |
24106 | Show DWARF variables such as the cache size"), | |
24107 | &show_dwarf_cmdlist, "maintenance show dwarf ", | |
ae038cb0 DJ |
24108 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
24109 | ||
24110 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
b4f54984 DE |
24111 | &dwarf_max_cache_age, _("\ |
24112 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24113 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
7915a72c AC |
24114 | A higher limit means that cached compilation units will be stored\n\ |
24115 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24116 | caching, which can slow down startup."), | |
2c5b56ce | 24117 | NULL, |
b4f54984 DE |
24118 | show_dwarf_max_cache_age, |
24119 | &set_dwarf_cmdlist, | |
24120 | &show_dwarf_cmdlist); | |
d97bc12b | 24121 | |
9eae7c52 | 24122 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
b4f54984 | 24123 | &dwarf_always_disassemble, _("\ |
9eae7c52 TT |
24124 | Set whether `info address' always disassembles DWARF expressions."), _("\ |
24125 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
24126 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
24127 | syntax. When disabled, expressions will be printed in a more\n\ | |
24128 | conversational style, when possible."), | |
24129 | NULL, | |
b4f54984 DE |
24130 | show_dwarf_always_disassemble, |
24131 | &set_dwarf_cmdlist, | |
24132 | &show_dwarf_cmdlist); | |
24133 | ||
24134 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ | |
24135 | Set debugging of the DWARF reader."), _("\ | |
24136 | Show debugging of the DWARF reader."), _("\ | |
24137 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
73be47f5 DE |
24138 | reading and symtab expansion. A value of 1 (one) provides basic\n\ |
24139 | information. A value greater than 1 provides more verbose information."), | |
45cfd468 DE |
24140 | NULL, |
24141 | NULL, | |
24142 | &setdebuglist, &showdebuglist); | |
24143 | ||
b4f54984 DE |
24144 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24145 | Set debugging of the DWARF DIE reader."), _("\ | |
24146 | Show debugging of the DWARF DIE reader."), _("\ | |
d97bc12b DE |
24147 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ |
24148 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
24149 | NULL, |
24150 | NULL, | |
24151 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24152 | |
27e0867f DE |
24153 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24154 | Set debugging of the dwarf line reader."), _("\ | |
24155 | Show debugging of the dwarf line reader."), _("\ | |
24156 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24157 | A value of 1 (one) provides basic information.\n\ | |
24158 | A value greater than 1 provides more verbose information."), | |
24159 | NULL, | |
24160 | NULL, | |
24161 | &setdebuglist, &showdebuglist); | |
24162 | ||
900e11f9 JK |
24163 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24164 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24165 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24166 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24167 | the demangler."), | |
24168 | NULL, show_check_physname, | |
24169 | &setdebuglist, &showdebuglist); | |
24170 | ||
e615022a DE |
24171 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24172 | no_class, &use_deprecated_index_sections, _("\ | |
24173 | Set whether to use deprecated gdb_index sections."), _("\ | |
24174 | Show whether to use deprecated gdb_index sections."), _("\ | |
24175 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24176 | Normally they are ignored either because of a missing feature or\n\ | |
24177 | performance issue.\n\ | |
24178 | Warning: This option must be enabled before gdb reads the file."), | |
24179 | NULL, | |
24180 | NULL, | |
24181 | &setlist, &showlist); | |
24182 | ||
96d19272 | 24183 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 24184 | _("\ |
fc1a9d6e | 24185 | Save a gdb-index file.\n\ |
11570e71 | 24186 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
24187 | &save_cmdlist); |
24188 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
24189 | |
24190 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24191 | &dwarf2_locexpr_funcs); | |
24192 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24193 | &dwarf2_loclist_funcs); | |
24194 | ||
24195 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24196 | &dwarf2_block_frame_base_locexpr_funcs); | |
24197 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24198 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 24199 | } |