Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
28e7fd62 | 3 | Copyright (C) 1994-2013 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 KS |
55 | #include "typeprint.h" |
56 | #include "jv-lang.h" | |
ccefe4c4 | 57 | #include "psympriv.h" |
9291a0cd TT |
58 | #include "exceptions.h" |
59 | #include "gdb_stat.h" | |
96d19272 | 60 | #include "completer.h" |
34eaf542 | 61 | #include "vec.h" |
98bfdba5 | 62 | #include "c-lang.h" |
a766d390 | 63 | #include "go-lang.h" |
98bfdba5 | 64 | #include "valprint.h" |
3019eac3 | 65 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 66 | #include "gdb/gdb-index.h" |
60d5a603 | 67 | #include <ctype.h> |
cbb099e8 | 68 | #include "gdb_bfd.h" |
4357ac6c | 69 | #include "f-lang.h" |
05cba821 | 70 | #include "source.h" |
614c279d | 71 | #include "filestuff.h" |
4c2df51b | 72 | |
c906108c SS |
73 | #include <fcntl.h> |
74 | #include "gdb_string.h" | |
4bdf3d34 | 75 | #include "gdb_assert.h" |
c906108c | 76 | #include <sys/types.h> |
d8151005 | 77 | |
34eaf542 TT |
78 | typedef struct symbol *symbolp; |
79 | DEF_VEC_P (symbolp); | |
80 | ||
45cfd468 DE |
81 | /* When non-zero, print basic high level tracing messages. |
82 | This is in contrast to the low level DIE reading of dwarf2_die_debug. */ | |
83 | static int dwarf2_read_debug = 0; | |
84 | ||
d97bc12b | 85 | /* When non-zero, dump DIEs after they are read in. */ |
ccce17b0 | 86 | static unsigned int dwarf2_die_debug = 0; |
d97bc12b | 87 | |
900e11f9 JK |
88 | /* When non-zero, cross-check physname against demangler. */ |
89 | static int check_physname = 0; | |
90 | ||
481860b3 | 91 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 92 | static int use_deprecated_index_sections = 0; |
481860b3 | 93 | |
6502dd73 DJ |
94 | static const struct objfile_data *dwarf2_objfile_data_key; |
95 | ||
f1e6e072 TT |
96 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
97 | ||
98 | static int dwarf2_locexpr_index; | |
99 | static int dwarf2_loclist_index; | |
100 | static int dwarf2_locexpr_block_index; | |
101 | static int dwarf2_loclist_block_index; | |
102 | ||
dce234bc PP |
103 | struct dwarf2_section_info |
104 | { | |
105 | asection *asection; | |
19ac8c2e | 106 | /* Pointer to section data, only valid if readin. */ |
d521ce57 | 107 | const gdb_byte *buffer; |
dce234bc | 108 | bfd_size_type size; |
be391dca TT |
109 | /* True if we have tried to read this section. */ |
110 | int readin; | |
dce234bc PP |
111 | }; |
112 | ||
8b70b953 TT |
113 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
114 | DEF_VEC_O (dwarf2_section_info_def); | |
115 | ||
9291a0cd TT |
116 | /* All offsets in the index are of this type. It must be |
117 | architecture-independent. */ | |
118 | typedef uint32_t offset_type; | |
119 | ||
120 | DEF_VEC_I (offset_type); | |
121 | ||
156942c7 DE |
122 | /* Ensure only legit values are used. */ |
123 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
124 | do { \ | |
125 | gdb_assert ((unsigned int) (value) <= 1); \ | |
126 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
127 | } while (0) | |
128 | ||
129 | /* Ensure only legit values are used. */ | |
130 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
131 | do { \ | |
132 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
133 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
134 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
135 | } while (0) | |
136 | ||
137 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
138 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
139 | do { \ | |
140 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
141 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
142 | } while (0) | |
143 | ||
9291a0cd TT |
144 | /* A description of the mapped index. The file format is described in |
145 | a comment by the code that writes the index. */ | |
146 | struct mapped_index | |
147 | { | |
559a7a62 JK |
148 | /* Index data format version. */ |
149 | int version; | |
150 | ||
9291a0cd TT |
151 | /* The total length of the buffer. */ |
152 | off_t total_size; | |
b11b1f88 | 153 | |
9291a0cd TT |
154 | /* A pointer to the address table data. */ |
155 | const gdb_byte *address_table; | |
b11b1f88 | 156 | |
9291a0cd TT |
157 | /* Size of the address table data in bytes. */ |
158 | offset_type address_table_size; | |
b11b1f88 | 159 | |
3876f04e DE |
160 | /* The symbol table, implemented as a hash table. */ |
161 | const offset_type *symbol_table; | |
b11b1f88 | 162 | |
9291a0cd | 163 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 164 | offset_type symbol_table_slots; |
b11b1f88 | 165 | |
9291a0cd TT |
166 | /* A pointer to the constant pool. */ |
167 | const char *constant_pool; | |
168 | }; | |
169 | ||
95554aad TT |
170 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
171 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
172 | ||
9cdd5dbd DE |
173 | /* Collection of data recorded per objfile. |
174 | This hangs off of dwarf2_objfile_data_key. */ | |
175 | ||
6502dd73 DJ |
176 | struct dwarf2_per_objfile |
177 | { | |
dce234bc PP |
178 | struct dwarf2_section_info info; |
179 | struct dwarf2_section_info abbrev; | |
180 | struct dwarf2_section_info line; | |
dce234bc PP |
181 | struct dwarf2_section_info loc; |
182 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 183 | struct dwarf2_section_info macro; |
dce234bc PP |
184 | struct dwarf2_section_info str; |
185 | struct dwarf2_section_info ranges; | |
3019eac3 | 186 | struct dwarf2_section_info addr; |
dce234bc PP |
187 | struct dwarf2_section_info frame; |
188 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 189 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 190 | |
8b70b953 TT |
191 | VEC (dwarf2_section_info_def) *types; |
192 | ||
be391dca TT |
193 | /* Back link. */ |
194 | struct objfile *objfile; | |
195 | ||
d467dd73 | 196 | /* Table of all the compilation units. This is used to locate |
10b3939b | 197 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
198 | struct dwarf2_per_cu_data **all_comp_units; |
199 | ||
200 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
201 | int n_comp_units; | |
202 | ||
1fd400ff | 203 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 204 | int n_type_units; |
1fd400ff | 205 | |
a2ce51a0 DE |
206 | /* The .debug_types-related CUs (TUs). |
207 | This is stored in malloc space because we may realloc it. */ | |
b4dd5633 | 208 | struct signatured_type **all_type_units; |
1fd400ff | 209 | |
f4dc4d17 DE |
210 | /* The number of entries in all_type_unit_groups. */ |
211 | int n_type_unit_groups; | |
212 | ||
213 | /* Table of type unit groups. | |
214 | This exists to make it easy to iterate over all CUs and TU groups. */ | |
215 | struct type_unit_group **all_type_unit_groups; | |
216 | ||
217 | /* Table of struct type_unit_group objects. | |
218 | The hash key is the DW_AT_stmt_list value. */ | |
219 | htab_t type_unit_groups; | |
72dca2f5 | 220 | |
348e048f DE |
221 | /* A table mapping .debug_types signatures to its signatured_type entry. |
222 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
223 | htab_t signatured_types; | |
224 | ||
f4dc4d17 DE |
225 | /* Type unit statistics, to see how well the scaling improvements |
226 | are doing. */ | |
227 | struct tu_stats | |
228 | { | |
229 | int nr_uniq_abbrev_tables; | |
230 | int nr_symtabs; | |
231 | int nr_symtab_sharers; | |
232 | int nr_stmt_less_type_units; | |
233 | } tu_stats; | |
234 | ||
235 | /* A chain of compilation units that are currently read in, so that | |
236 | they can be freed later. */ | |
237 | struct dwarf2_per_cu_data *read_in_chain; | |
238 | ||
3019eac3 DE |
239 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
240 | This is NULL if the table hasn't been allocated yet. */ | |
241 | htab_t dwo_files; | |
242 | ||
80626a55 DE |
243 | /* Non-zero if we've check for whether there is a DWP file. */ |
244 | int dwp_checked; | |
245 | ||
246 | /* The DWP file if there is one, or NULL. */ | |
247 | struct dwp_file *dwp_file; | |
248 | ||
36586728 TT |
249 | /* The shared '.dwz' file, if one exists. This is used when the |
250 | original data was compressed using 'dwz -m'. */ | |
251 | struct dwz_file *dwz_file; | |
252 | ||
72dca2f5 FR |
253 | /* A flag indicating wether this objfile has a section loaded at a |
254 | VMA of 0. */ | |
255 | int has_section_at_zero; | |
9291a0cd | 256 | |
ae2de4f8 DE |
257 | /* True if we are using the mapped index, |
258 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
259 | unsigned char using_index; |
260 | ||
ae2de4f8 | 261 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 262 | struct mapped_index *index_table; |
98bfdba5 | 263 | |
7b9f3c50 | 264 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
265 | TUs typically share line table entries with a CU, so we maintain a |
266 | separate table of all line table entries to support the sharing. | |
267 | Note that while there can be way more TUs than CUs, we've already | |
268 | sorted all the TUs into "type unit groups", grouped by their | |
269 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
270 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
271 | htab_t quick_file_names_table; |
272 | ||
98bfdba5 PA |
273 | /* Set during partial symbol reading, to prevent queueing of full |
274 | symbols. */ | |
275 | int reading_partial_symbols; | |
673bfd45 | 276 | |
dee91e82 | 277 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 278 | This is NULL if not allocated yet. |
02142a6c | 279 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 280 | htab_t die_type_hash; |
95554aad TT |
281 | |
282 | /* The CUs we recently read. */ | |
283 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
284 | }; |
285 | ||
286 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 287 | |
251d32d9 | 288 | /* Default names of the debugging sections. */ |
c906108c | 289 | |
233a11ab CS |
290 | /* Note that if the debugging section has been compressed, it might |
291 | have a name like .zdebug_info. */ | |
292 | ||
9cdd5dbd DE |
293 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
294 | { | |
251d32d9 TG |
295 | { ".debug_info", ".zdebug_info" }, |
296 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
297 | { ".debug_line", ".zdebug_line" }, | |
298 | { ".debug_loc", ".zdebug_loc" }, | |
299 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 300 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
301 | { ".debug_str", ".zdebug_str" }, |
302 | { ".debug_ranges", ".zdebug_ranges" }, | |
303 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 304 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
305 | { ".debug_frame", ".zdebug_frame" }, |
306 | { ".eh_frame", NULL }, | |
24d3216f TT |
307 | { ".gdb_index", ".zgdb_index" }, |
308 | 23 | |
251d32d9 | 309 | }; |
c906108c | 310 | |
80626a55 | 311 | /* List of DWO/DWP sections. */ |
3019eac3 | 312 | |
80626a55 | 313 | static const struct dwop_section_names |
3019eac3 DE |
314 | { |
315 | struct dwarf2_section_names abbrev_dwo; | |
316 | struct dwarf2_section_names info_dwo; | |
317 | struct dwarf2_section_names line_dwo; | |
318 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
319 | struct dwarf2_section_names macinfo_dwo; |
320 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
321 | struct dwarf2_section_names str_dwo; |
322 | struct dwarf2_section_names str_offsets_dwo; | |
323 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
324 | struct dwarf2_section_names cu_index; |
325 | struct dwarf2_section_names tu_index; | |
3019eac3 | 326 | } |
80626a55 | 327 | dwop_section_names = |
3019eac3 DE |
328 | { |
329 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
330 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
331 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
332 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
333 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
334 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
335 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
336 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
337 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
338 | { ".debug_cu_index", ".zdebug_cu_index" }, |
339 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
340 | }; |
341 | ||
c906108c SS |
342 | /* local data types */ |
343 | ||
107d2387 AC |
344 | /* The data in a compilation unit header, after target2host |
345 | translation, looks like this. */ | |
c906108c | 346 | struct comp_unit_head |
a738430d | 347 | { |
c764a876 | 348 | unsigned int length; |
a738430d | 349 | short version; |
a738430d MK |
350 | unsigned char addr_size; |
351 | unsigned char signed_addr_p; | |
b64f50a1 | 352 | sect_offset abbrev_offset; |
57349743 | 353 | |
a738430d MK |
354 | /* Size of file offsets; either 4 or 8. */ |
355 | unsigned int offset_size; | |
57349743 | 356 | |
a738430d MK |
357 | /* Size of the length field; either 4 or 12. */ |
358 | unsigned int initial_length_size; | |
57349743 | 359 | |
a738430d MK |
360 | /* Offset to the first byte of this compilation unit header in the |
361 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 362 | sect_offset offset; |
57349743 | 363 | |
d00adf39 DE |
364 | /* Offset to first die in this cu from the start of the cu. |
365 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 366 | cu_offset first_die_offset; |
a738430d | 367 | }; |
c906108c | 368 | |
3da10d80 KS |
369 | /* Type used for delaying computation of method physnames. |
370 | See comments for compute_delayed_physnames. */ | |
371 | struct delayed_method_info | |
372 | { | |
373 | /* The type to which the method is attached, i.e., its parent class. */ | |
374 | struct type *type; | |
375 | ||
376 | /* The index of the method in the type's function fieldlists. */ | |
377 | int fnfield_index; | |
378 | ||
379 | /* The index of the method in the fieldlist. */ | |
380 | int index; | |
381 | ||
382 | /* The name of the DIE. */ | |
383 | const char *name; | |
384 | ||
385 | /* The DIE associated with this method. */ | |
386 | struct die_info *die; | |
387 | }; | |
388 | ||
389 | typedef struct delayed_method_info delayed_method_info; | |
390 | DEF_VEC_O (delayed_method_info); | |
391 | ||
e7c27a73 DJ |
392 | /* Internal state when decoding a particular compilation unit. */ |
393 | struct dwarf2_cu | |
394 | { | |
395 | /* The objfile containing this compilation unit. */ | |
396 | struct objfile *objfile; | |
397 | ||
d00adf39 | 398 | /* The header of the compilation unit. */ |
e7c27a73 | 399 | struct comp_unit_head header; |
e142c38c | 400 | |
d00adf39 DE |
401 | /* Base address of this compilation unit. */ |
402 | CORE_ADDR base_address; | |
403 | ||
404 | /* Non-zero if base_address has been set. */ | |
405 | int base_known; | |
406 | ||
e142c38c DJ |
407 | /* The language we are debugging. */ |
408 | enum language language; | |
409 | const struct language_defn *language_defn; | |
410 | ||
b0f35d58 DL |
411 | const char *producer; |
412 | ||
e142c38c DJ |
413 | /* The generic symbol table building routines have separate lists for |
414 | file scope symbols and all all other scopes (local scopes). So | |
415 | we need to select the right one to pass to add_symbol_to_list(). | |
416 | We do it by keeping a pointer to the correct list in list_in_scope. | |
417 | ||
418 | FIXME: The original dwarf code just treated the file scope as the | |
419 | first local scope, and all other local scopes as nested local | |
420 | scopes, and worked fine. Check to see if we really need to | |
421 | distinguish these in buildsym.c. */ | |
422 | struct pending **list_in_scope; | |
423 | ||
433df2d4 DE |
424 | /* The abbrev table for this CU. |
425 | Normally this points to the abbrev table in the objfile. | |
426 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
427 | struct abbrev_table *abbrev_table; | |
72bf9492 | 428 | |
b64f50a1 JK |
429 | /* Hash table holding all the loaded partial DIEs |
430 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
431 | htab_t partial_dies; |
432 | ||
433 | /* Storage for things with the same lifetime as this read-in compilation | |
434 | unit, including partial DIEs. */ | |
435 | struct obstack comp_unit_obstack; | |
436 | ||
ae038cb0 DJ |
437 | /* When multiple dwarf2_cu structures are living in memory, this field |
438 | chains them all together, so that they can be released efficiently. | |
439 | We will probably also want a generation counter so that most-recently-used | |
440 | compilation units are cached... */ | |
441 | struct dwarf2_per_cu_data *read_in_chain; | |
442 | ||
69d751e3 | 443 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
444 | struct dwarf2_per_cu_data *per_cu; |
445 | ||
446 | /* How many compilation units ago was this CU last referenced? */ | |
447 | int last_used; | |
448 | ||
b64f50a1 JK |
449 | /* A hash table of DIE cu_offset for following references with |
450 | die_info->offset.sect_off as hash. */ | |
51545339 | 451 | htab_t die_hash; |
10b3939b DJ |
452 | |
453 | /* Full DIEs if read in. */ | |
454 | struct die_info *dies; | |
455 | ||
456 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
457 | units referenced by this one. Only set during full symbol processing; | |
458 | partial symbol tables do not have dependencies. */ | |
459 | htab_t dependencies; | |
460 | ||
cb1df416 DJ |
461 | /* Header data from the line table, during full symbol processing. */ |
462 | struct line_header *line_header; | |
463 | ||
3da10d80 KS |
464 | /* A list of methods which need to have physnames computed |
465 | after all type information has been read. */ | |
466 | VEC (delayed_method_info) *method_list; | |
467 | ||
96408a79 SA |
468 | /* To be copied to symtab->call_site_htab. */ |
469 | htab_t call_site_htab; | |
470 | ||
034e5797 DE |
471 | /* Non-NULL if this CU came from a DWO file. |
472 | There is an invariant here that is important to remember: | |
473 | Except for attributes copied from the top level DIE in the "main" | |
474 | (or "stub") file in preparation for reading the DWO file | |
475 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
476 | Either there isn't a DWO file (in which case this is NULL and the point | |
477 | is moot), or there is and either we're not going to read it (in which | |
478 | case this is NULL) or there is and we are reading it (in which case this | |
479 | is non-NULL). */ | |
3019eac3 DE |
480 | struct dwo_unit *dwo_unit; |
481 | ||
482 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
483 | (zero is a valid value though). | |
484 | Note this value comes from the stub CU/TU's DIE. */ | |
485 | ULONGEST addr_base; | |
486 | ||
2e3cf129 DE |
487 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
488 | (zero is a valid value though). | |
489 | Note this value comes from the stub CU/TU's DIE. | |
490 | Also note that the value is zero in the non-DWO case so this value can | |
ab435259 DE |
491 | be used without needing to know whether DWO files are in use or not. |
492 | N.B. This does not apply to DW_AT_ranges appearing in | |
493 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
494 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
495 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
496 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
497 | ULONGEST ranges_base; |
498 | ||
ae038cb0 DJ |
499 | /* Mark used when releasing cached dies. */ |
500 | unsigned int mark : 1; | |
501 | ||
8be455d7 JK |
502 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
503 | This test is imperfect as there may exist optimized debug code not using | |
504 | any location list and still facing inlining issues if handled as | |
505 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 506 | unsigned int has_loclist : 1; |
ba919b58 | 507 | |
1b80a9fa JK |
508 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
509 | if all the producer_is_* fields are valid. This information is cached | |
510 | because profiling CU expansion showed excessive time spent in | |
511 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
512 | unsigned int checked_producer : 1; |
513 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 514 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 515 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
516 | |
517 | /* When set, the file that we're processing is known to have | |
518 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
519 | this information, but later versions do. */ | |
520 | ||
521 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
522 | }; |
523 | ||
10b3939b DJ |
524 | /* Persistent data held for a compilation unit, even when not |
525 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 526 | read_symtab_private field of the psymtab. */ |
10b3939b | 527 | |
ae038cb0 DJ |
528 | struct dwarf2_per_cu_data |
529 | { | |
36586728 | 530 | /* The start offset and length of this compilation unit. |
45452591 | 531 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
532 | initial_length_size. |
533 | If the DIE refers to a DWO file, this is always of the original die, | |
534 | not the DWO file. */ | |
b64f50a1 | 535 | sect_offset offset; |
36586728 | 536 | unsigned int length; |
ae038cb0 DJ |
537 | |
538 | /* Flag indicating this compilation unit will be read in before | |
539 | any of the current compilation units are processed. */ | |
c764a876 | 540 | unsigned int queued : 1; |
ae038cb0 | 541 | |
0d99eb77 DE |
542 | /* This flag will be set when reading partial DIEs if we need to load |
543 | absolutely all DIEs for this compilation unit, instead of just the ones | |
544 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
545 | hash table and don't find it. */ |
546 | unsigned int load_all_dies : 1; | |
547 | ||
0186c6a7 DE |
548 | /* Non-zero if this CU is from .debug_types. |
549 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
550 | this is non-zero. */ | |
3019eac3 DE |
551 | unsigned int is_debug_types : 1; |
552 | ||
36586728 TT |
553 | /* Non-zero if this CU is from the .dwz file. */ |
554 | unsigned int is_dwz : 1; | |
555 | ||
a2ce51a0 DE |
556 | /* Non-zero if reading a TU directly from a DWO file, bypassing the stub. |
557 | This flag is only valid if is_debug_types is true. | |
558 | We can't read a CU directly from a DWO file: There are required | |
559 | attributes in the stub. */ | |
560 | unsigned int reading_dwo_directly : 1; | |
561 | ||
7ee85ab1 DE |
562 | /* Non-zero if the TU has been read. |
563 | This is used to assist the "Stay in DWO Optimization" for Fission: | |
564 | When reading a DWO, it's faster to read TUs from the DWO instead of | |
565 | fetching them from random other DWOs (due to comdat folding). | |
566 | If the TU has already been read, the optimization is unnecessary | |
567 | (and unwise - we don't want to change where gdb thinks the TU lives | |
568 | "midflight"). | |
569 | This flag is only valid if is_debug_types is true. */ | |
570 | unsigned int tu_read : 1; | |
571 | ||
3019eac3 DE |
572 | /* The section this CU/TU lives in. |
573 | If the DIE refers to a DWO file, this is always the original die, | |
574 | not the DWO file. */ | |
8a0459fd | 575 | struct dwarf2_section_info *section; |
348e048f | 576 | |
17ea53c3 JK |
577 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
578 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 579 | struct dwarf2_cu *cu; |
1c379e20 | 580 | |
9cdd5dbd DE |
581 | /* The corresponding objfile. |
582 | Normally we can get the objfile from dwarf2_per_objfile. | |
583 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
584 | struct objfile *objfile; |
585 | ||
586 | /* When using partial symbol tables, the 'psymtab' field is active. | |
587 | Otherwise the 'quick' field is active. */ | |
588 | union | |
589 | { | |
590 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 591 | or NULL for unread partial units. */ |
9291a0cd TT |
592 | struct partial_symtab *psymtab; |
593 | ||
594 | /* Data needed by the "quick" functions. */ | |
595 | struct dwarf2_per_cu_quick_data *quick; | |
596 | } v; | |
95554aad | 597 | |
796a7ff8 DE |
598 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
599 | while reading psymtabs, used to compute the psymtab dependencies, | |
600 | and then cleared. Then it is filled in again while reading full | |
601 | symbols, and only deleted when the objfile is destroyed. | |
602 | ||
603 | This is also used to work around a difference between the way gold | |
604 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
605 | is a gold bug. For symbols coming from TUs, gold records in the index | |
606 | the CU that includes the TU instead of the TU itself. This breaks | |
607 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
608 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
609 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
610 | we need to look in TU Z to find X. Fortunately, this is akin to | |
611 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
612 | .gdb_index version <=7 this also records the TUs that the CU referred | |
613 | to. Concurrently with this change gdb was modified to emit version 8 | |
69d751e3 DE |
614 | indices so we only pay a price for gold generated indices. |
615 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
796a7ff8 | 616 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; |
ae038cb0 DJ |
617 | }; |
618 | ||
348e048f DE |
619 | /* Entry in the signatured_types hash table. */ |
620 | ||
621 | struct signatured_type | |
622 | { | |
42e7ad6c | 623 | /* The "per_cu" object of this type. |
ac9ec31b | 624 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
625 | N.B.: This is the first member so that it's easy to convert pointers |
626 | between them. */ | |
627 | struct dwarf2_per_cu_data per_cu; | |
628 | ||
3019eac3 | 629 | /* The type's signature. */ |
348e048f DE |
630 | ULONGEST signature; |
631 | ||
3019eac3 | 632 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
633 | If this TU is a DWO stub and the definition lives in a DWO file |
634 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
635 | cu_offset type_offset_in_tu; |
636 | ||
637 | /* Offset in the section of the type's DIE. | |
638 | If the definition lives in a DWO file, this is the offset in the | |
639 | .debug_types.dwo section. | |
640 | The value is zero until the actual value is known. | |
641 | Zero is otherwise not a valid section offset. */ | |
642 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
643 | |
644 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
645 | can share them. This points to the containing symtab. */ | |
646 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
647 | |
648 | /* The type. | |
649 | The first time we encounter this type we fully read it in and install it | |
650 | in the symbol tables. Subsequent times we only need the type. */ | |
651 | struct type *type; | |
a2ce51a0 DE |
652 | |
653 | /* Containing DWO unit. | |
654 | This field is valid iff per_cu.reading_dwo_directly. */ | |
655 | struct dwo_unit *dwo_unit; | |
348e048f DE |
656 | }; |
657 | ||
0186c6a7 DE |
658 | typedef struct signatured_type *sig_type_ptr; |
659 | DEF_VEC_P (sig_type_ptr); | |
660 | ||
094b34ac DE |
661 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
662 | This includes type_unit_group and quick_file_names. */ | |
663 | ||
664 | struct stmt_list_hash | |
665 | { | |
666 | /* The DWO unit this table is from or NULL if there is none. */ | |
667 | struct dwo_unit *dwo_unit; | |
668 | ||
669 | /* Offset in .debug_line or .debug_line.dwo. */ | |
670 | sect_offset line_offset; | |
671 | }; | |
672 | ||
f4dc4d17 DE |
673 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
674 | an object of this type. */ | |
675 | ||
676 | struct type_unit_group | |
677 | { | |
0186c6a7 | 678 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
679 | To simplify things we create an artificial CU that "includes" all the |
680 | type units using this stmt_list so that the rest of the code still has | |
681 | a "per_cu" handle on the symtab. | |
682 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 683 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
684 | struct dwarf2_per_cu_data per_cu; |
685 | ||
0186c6a7 DE |
686 | /* The TUs that share this DW_AT_stmt_list entry. |
687 | This is added to while parsing type units to build partial symtabs, | |
688 | and is deleted afterwards and not used again. */ | |
689 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 DE |
690 | |
691 | /* The primary symtab. | |
094b34ac DE |
692 | Type units in a group needn't all be defined in the same source file, |
693 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
694 | struct symtab *primary_symtab; |
695 | ||
094b34ac DE |
696 | /* The data used to construct the hash key. */ |
697 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
698 | |
699 | /* The number of symtabs from the line header. | |
700 | The value here must match line_header.num_file_names. */ | |
701 | unsigned int num_symtabs; | |
702 | ||
703 | /* The symbol tables for this TU (obtained from the files listed in | |
704 | DW_AT_stmt_list). | |
705 | WARNING: The order of entries here must match the order of entries | |
706 | in the line header. After the first TU using this type_unit_group, the | |
707 | line header for the subsequent TUs is recreated from this. This is done | |
708 | because we need to use the same symtabs for each TU using the same | |
709 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
710 | there's no guarantee the line header doesn't have duplicate entries. */ | |
711 | struct symtab **symtabs; | |
712 | }; | |
713 | ||
80626a55 | 714 | /* These sections are what may appear in a DWO file. */ |
3019eac3 DE |
715 | |
716 | struct dwo_sections | |
717 | { | |
718 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
719 | struct dwarf2_section_info line; |
720 | struct dwarf2_section_info loc; | |
09262596 DE |
721 | struct dwarf2_section_info macinfo; |
722 | struct dwarf2_section_info macro; | |
3019eac3 DE |
723 | struct dwarf2_section_info str; |
724 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
725 | /* In the case of a virtual DWO file, these two are unused. */ |
726 | struct dwarf2_section_info info; | |
3019eac3 DE |
727 | VEC (dwarf2_section_info_def) *types; |
728 | }; | |
729 | ||
c88ee1f0 | 730 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
731 | |
732 | struct dwo_unit | |
733 | { | |
734 | /* Backlink to the containing struct dwo_file. */ | |
735 | struct dwo_file *dwo_file; | |
736 | ||
737 | /* The "id" that distinguishes this CU/TU. | |
738 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
739 | Since signatures came first, we stick with it for consistency. */ | |
740 | ULONGEST signature; | |
741 | ||
742 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 743 | struct dwarf2_section_info *section; |
3019eac3 | 744 | |
19ac8c2e | 745 | /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */ |
3019eac3 DE |
746 | sect_offset offset; |
747 | unsigned int length; | |
748 | ||
749 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
750 | cu_offset type_offset_in_tu; | |
751 | }; | |
752 | ||
80626a55 | 753 | /* Data for one DWO file. |
57d63ce2 DE |
754 | |
755 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
756 | appears in a DWP file). DWP files don't really have DWO files per se - | |
757 | comdat folding of types "loses" the DWO file they came from, and from | |
758 | a high level view DWP files appear to contain a mass of random types. | |
759 | However, to maintain consistency with the non-DWP case we pretend DWP | |
760 | files contain virtual DWO files, and we assign each TU with one virtual | |
761 | DWO file (generally based on the line and abbrev section offsets - | |
762 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
763 | |
764 | struct dwo_file | |
765 | { | |
0ac5b59e | 766 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
767 | For virtual DWO files the name is constructed from the section offsets |
768 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
769 | from related CU+TUs. */ | |
0ac5b59e DE |
770 | const char *dwo_name; |
771 | ||
772 | /* The DW_AT_comp_dir attribute. */ | |
773 | const char *comp_dir; | |
3019eac3 | 774 | |
80626a55 DE |
775 | /* The bfd, when the file is open. Otherwise this is NULL. |
776 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
777 | bfd *dbfd; | |
3019eac3 DE |
778 | |
779 | /* Section info for this file. */ | |
780 | struct dwo_sections sections; | |
781 | ||
19c3d4c9 DE |
782 | /* The CU in the file. |
783 | We only support one because having more than one requires hacking the | |
784 | dwo_name of each to match, which is highly unlikely to happen. | |
785 | Doing this means all TUs can share comp_dir: We also assume that | |
786 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
787 | struct dwo_unit *cu; | |
3019eac3 DE |
788 | |
789 | /* Table of TUs in the file. | |
790 | Each element is a struct dwo_unit. */ | |
791 | htab_t tus; | |
792 | }; | |
793 | ||
80626a55 DE |
794 | /* These sections are what may appear in a DWP file. */ |
795 | ||
796 | struct dwp_sections | |
797 | { | |
798 | struct dwarf2_section_info str; | |
799 | struct dwarf2_section_info cu_index; | |
800 | struct dwarf2_section_info tu_index; | |
801 | /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced | |
802 | by section number. We don't need to record them here. */ | |
803 | }; | |
804 | ||
805 | /* These sections are what may appear in a virtual DWO file. */ | |
806 | ||
807 | struct virtual_dwo_sections | |
808 | { | |
809 | struct dwarf2_section_info abbrev; | |
810 | struct dwarf2_section_info line; | |
811 | struct dwarf2_section_info loc; | |
812 | struct dwarf2_section_info macinfo; | |
813 | struct dwarf2_section_info macro; | |
814 | struct dwarf2_section_info str_offsets; | |
815 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 816 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
817 | struct dwarf2_section_info info_or_types; |
818 | }; | |
819 | ||
820 | /* Contents of DWP hash tables. */ | |
821 | ||
822 | struct dwp_hash_table | |
823 | { | |
824 | uint32_t nr_units, nr_slots; | |
825 | const gdb_byte *hash_table, *unit_table, *section_pool; | |
826 | }; | |
827 | ||
828 | /* Data for one DWP file. */ | |
829 | ||
830 | struct dwp_file | |
831 | { | |
832 | /* Name of the file. */ | |
833 | const char *name; | |
834 | ||
93417882 | 835 | /* The bfd. */ |
80626a55 DE |
836 | bfd *dbfd; |
837 | ||
838 | /* Section info for this file. */ | |
839 | struct dwp_sections sections; | |
840 | ||
57d63ce2 | 841 | /* Table of CUs in the file. */ |
80626a55 DE |
842 | const struct dwp_hash_table *cus; |
843 | ||
844 | /* Table of TUs in the file. */ | |
845 | const struct dwp_hash_table *tus; | |
846 | ||
19ac8c2e DE |
847 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
848 | htab_t loaded_cus; | |
849 | htab_t loaded_tus; | |
80626a55 DE |
850 | |
851 | /* Table to map ELF section numbers to their sections. */ | |
852 | unsigned int num_sections; | |
853 | asection **elf_sections; | |
854 | }; | |
855 | ||
36586728 TT |
856 | /* This represents a '.dwz' file. */ |
857 | ||
858 | struct dwz_file | |
859 | { | |
860 | /* A dwz file can only contain a few sections. */ | |
861 | struct dwarf2_section_info abbrev; | |
862 | struct dwarf2_section_info info; | |
863 | struct dwarf2_section_info str; | |
864 | struct dwarf2_section_info line; | |
865 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 866 | struct dwarf2_section_info gdb_index; |
36586728 TT |
867 | |
868 | /* The dwz's BFD. */ | |
869 | bfd *dwz_bfd; | |
870 | }; | |
871 | ||
0963b4bd MS |
872 | /* Struct used to pass misc. parameters to read_die_and_children, et |
873 | al. which are used for both .debug_info and .debug_types dies. | |
874 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 875 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
876 | |
877 | struct die_reader_specs | |
878 | { | |
a32a8923 | 879 | /* The bfd of die_section. */ |
93311388 DE |
880 | bfd* abfd; |
881 | ||
882 | /* The CU of the DIE we are parsing. */ | |
883 | struct dwarf2_cu *cu; | |
884 | ||
80626a55 | 885 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
886 | struct dwo_file *dwo_file; |
887 | ||
dee91e82 | 888 | /* The section the die comes from. |
3019eac3 | 889 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
890 | struct dwarf2_section_info *die_section; |
891 | ||
892 | /* die_section->buffer. */ | |
d521ce57 | 893 | const gdb_byte *buffer; |
f664829e DE |
894 | |
895 | /* The end of the buffer. */ | |
896 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
897 | |
898 | /* The value of the DW_AT_comp_dir attribute. */ | |
899 | const char *comp_dir; | |
93311388 DE |
900 | }; |
901 | ||
fd820528 | 902 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 903 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 904 | const gdb_byte *info_ptr, |
dee91e82 DE |
905 | struct die_info *comp_unit_die, |
906 | int has_children, | |
907 | void *data); | |
908 | ||
debd256d JB |
909 | /* The line number information for a compilation unit (found in the |
910 | .debug_line section) begins with a "statement program header", | |
911 | which contains the following information. */ | |
912 | struct line_header | |
913 | { | |
914 | unsigned int total_length; | |
915 | unsigned short version; | |
916 | unsigned int header_length; | |
917 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 918 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
919 | unsigned char default_is_stmt; |
920 | int line_base; | |
921 | unsigned char line_range; | |
922 | unsigned char opcode_base; | |
923 | ||
924 | /* standard_opcode_lengths[i] is the number of operands for the | |
925 | standard opcode whose value is i. This means that | |
926 | standard_opcode_lengths[0] is unused, and the last meaningful | |
927 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
928 | unsigned char *standard_opcode_lengths; | |
929 | ||
930 | /* The include_directories table. NOTE! These strings are not | |
931 | allocated with xmalloc; instead, they are pointers into | |
932 | debug_line_buffer. If you try to free them, `free' will get | |
933 | indigestion. */ | |
934 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 935 | const char **include_dirs; |
debd256d JB |
936 | |
937 | /* The file_names table. NOTE! These strings are not allocated | |
938 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
939 | Don't try to free them directly. */ | |
940 | unsigned int num_file_names, file_names_size; | |
941 | struct file_entry | |
c906108c | 942 | { |
d521ce57 | 943 | const char *name; |
debd256d JB |
944 | unsigned int dir_index; |
945 | unsigned int mod_time; | |
946 | unsigned int length; | |
aaa75496 | 947 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 948 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
949 | } *file_names; |
950 | ||
951 | /* The start and end of the statement program following this | |
6502dd73 | 952 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 953 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 954 | }; |
c906108c SS |
955 | |
956 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 957 | need this much information. */ |
c906108c SS |
958 | struct partial_die_info |
959 | { | |
72bf9492 | 960 | /* Offset of this DIE. */ |
b64f50a1 | 961 | sect_offset offset; |
72bf9492 DJ |
962 | |
963 | /* DWARF-2 tag for this DIE. */ | |
964 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
965 | ||
72bf9492 DJ |
966 | /* Assorted flags describing the data found in this DIE. */ |
967 | unsigned int has_children : 1; | |
968 | unsigned int is_external : 1; | |
969 | unsigned int is_declaration : 1; | |
970 | unsigned int has_type : 1; | |
971 | unsigned int has_specification : 1; | |
972 | unsigned int has_pc_info : 1; | |
481860b3 | 973 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
974 | |
975 | /* Flag set if the SCOPE field of this structure has been | |
976 | computed. */ | |
977 | unsigned int scope_set : 1; | |
978 | ||
fa4028e9 JB |
979 | /* Flag set if the DIE has a byte_size attribute. */ |
980 | unsigned int has_byte_size : 1; | |
981 | ||
98bfdba5 PA |
982 | /* Flag set if any of the DIE's children are template arguments. */ |
983 | unsigned int has_template_arguments : 1; | |
984 | ||
abc72ce4 DE |
985 | /* Flag set if fixup_partial_die has been called on this die. */ |
986 | unsigned int fixup_called : 1; | |
987 | ||
36586728 TT |
988 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
989 | unsigned int is_dwz : 1; | |
990 | ||
991 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
992 | unsigned int spec_is_dwz : 1; | |
993 | ||
72bf9492 | 994 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 995 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 996 | const char *name; |
72bf9492 | 997 | |
abc72ce4 DE |
998 | /* The linkage name, if present. */ |
999 | const char *linkage_name; | |
1000 | ||
72bf9492 DJ |
1001 | /* The scope to prepend to our children. This is generally |
1002 | allocated on the comp_unit_obstack, so will disappear | |
1003 | when this compilation unit leaves the cache. */ | |
15d034d0 | 1004 | const char *scope; |
72bf9492 | 1005 | |
95554aad TT |
1006 | /* Some data associated with the partial DIE. The tag determines |
1007 | which field is live. */ | |
1008 | union | |
1009 | { | |
1010 | /* The location description associated with this DIE, if any. */ | |
1011 | struct dwarf_block *locdesc; | |
1012 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
1013 | sect_offset offset; | |
1014 | } d; | |
72bf9492 DJ |
1015 | |
1016 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
1017 | CORE_ADDR lowpc; |
1018 | CORE_ADDR highpc; | |
72bf9492 | 1019 | |
93311388 | 1020 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1021 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
1022 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
1023 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 1024 | const gdb_byte *sibling; |
72bf9492 DJ |
1025 | |
1026 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1027 | DW_AT_specification (or DW_AT_abstract_origin or | |
1028 | DW_AT_extension). */ | |
b64f50a1 | 1029 | sect_offset spec_offset; |
72bf9492 DJ |
1030 | |
1031 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1032 | if any. */ | |
1033 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1034 | }; |
1035 | ||
0963b4bd | 1036 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1037 | struct abbrev_info |
1038 | { | |
1039 | unsigned int number; /* number identifying abbrev */ | |
1040 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1041 | unsigned short has_children; /* boolean */ |
1042 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1043 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1044 | struct abbrev_info *next; /* next in chain */ | |
1045 | }; | |
1046 | ||
1047 | struct attr_abbrev | |
1048 | { | |
9d25dd43 DE |
1049 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1050 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1051 | }; |
1052 | ||
433df2d4 DE |
1053 | /* Size of abbrev_table.abbrev_hash_table. */ |
1054 | #define ABBREV_HASH_SIZE 121 | |
1055 | ||
1056 | /* Top level data structure to contain an abbreviation table. */ | |
1057 | ||
1058 | struct abbrev_table | |
1059 | { | |
f4dc4d17 DE |
1060 | /* Where the abbrev table came from. |
1061 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1062 | sect_offset offset; |
1063 | ||
1064 | /* Storage for the abbrev table. */ | |
1065 | struct obstack abbrev_obstack; | |
1066 | ||
1067 | /* Hash table of abbrevs. | |
1068 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1069 | It could be statically allocated, but the previous code didn't so we | |
1070 | don't either. */ | |
1071 | struct abbrev_info **abbrevs; | |
1072 | }; | |
1073 | ||
0963b4bd | 1074 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1075 | struct attribute |
1076 | { | |
9d25dd43 | 1077 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1078 | ENUM_BITFIELD(dwarf_form) form : 15; |
1079 | ||
1080 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1081 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1082 | here for better struct attribute alignment. */ | |
1083 | unsigned int string_is_canonical : 1; | |
1084 | ||
b60c80d6 DJ |
1085 | union |
1086 | { | |
15d034d0 | 1087 | const char *str; |
b60c80d6 | 1088 | struct dwarf_block *blk; |
43bbcdc2 PH |
1089 | ULONGEST unsnd; |
1090 | LONGEST snd; | |
b60c80d6 | 1091 | CORE_ADDR addr; |
ac9ec31b | 1092 | ULONGEST signature; |
b60c80d6 DJ |
1093 | } |
1094 | u; | |
1095 | }; | |
1096 | ||
0963b4bd | 1097 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1098 | struct die_info |
1099 | { | |
76815b17 DE |
1100 | /* DWARF-2 tag for this DIE. */ |
1101 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1102 | ||
1103 | /* Number of attributes */ | |
98bfdba5 PA |
1104 | unsigned char num_attrs; |
1105 | ||
1106 | /* True if we're presently building the full type name for the | |
1107 | type derived from this DIE. */ | |
1108 | unsigned char building_fullname : 1; | |
76815b17 DE |
1109 | |
1110 | /* Abbrev number */ | |
1111 | unsigned int abbrev; | |
1112 | ||
93311388 | 1113 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1114 | sect_offset offset; |
78ba4af6 JB |
1115 | |
1116 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1117 | points to this die's parent; CHILD points to the first child of | |
1118 | this node; and all the children of a given node are chained | |
4950bc1c | 1119 | together via their SIBLING fields. */ |
639d11d3 DC |
1120 | struct die_info *child; /* Its first child, if any. */ |
1121 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1122 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1123 | |
b60c80d6 DJ |
1124 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1125 | zero, but it's not common and zero-sized arrays are not | |
1126 | sufficiently portable C. */ | |
1127 | struct attribute attrs[1]; | |
c906108c SS |
1128 | }; |
1129 | ||
0963b4bd | 1130 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1131 | |
1132 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1133 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1134 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1135 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1136 | #define DW_SND(attr) ((attr)->u.snd) | |
1137 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1138 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1139 | |
0963b4bd | 1140 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1141 | struct dwarf_block |
1142 | { | |
56eb65bd | 1143 | size_t size; |
1d6edc3c JK |
1144 | |
1145 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1146 | const gdb_byte *data; |
c906108c SS |
1147 | }; |
1148 | ||
c906108c SS |
1149 | #ifndef ATTR_ALLOC_CHUNK |
1150 | #define ATTR_ALLOC_CHUNK 4 | |
1151 | #endif | |
1152 | ||
c906108c SS |
1153 | /* Allocate fields for structs, unions and enums in this size. */ |
1154 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1155 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1156 | #endif | |
1157 | ||
c906108c SS |
1158 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1159 | but this would require a corresponding change in unpack_field_as_long | |
1160 | and friends. */ | |
1161 | static int bits_per_byte = 8; | |
1162 | ||
1163 | /* The routines that read and process dies for a C struct or C++ class | |
1164 | pass lists of data member fields and lists of member function fields | |
1165 | in an instance of a field_info structure, as defined below. */ | |
1166 | struct field_info | |
c5aa993b | 1167 | { |
0963b4bd | 1168 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1169 | struct nextfield |
1170 | { | |
1171 | struct nextfield *next; | |
1172 | int accessibility; | |
1173 | int virtuality; | |
1174 | struct field field; | |
1175 | } | |
7d0ccb61 | 1176 | *fields, *baseclasses; |
c906108c | 1177 | |
7d0ccb61 | 1178 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1179 | int nfields; |
c906108c | 1180 | |
c5aa993b JM |
1181 | /* Number of baseclasses. */ |
1182 | int nbaseclasses; | |
c906108c | 1183 | |
c5aa993b JM |
1184 | /* Set if the accesibility of one of the fields is not public. */ |
1185 | int non_public_fields; | |
c906108c | 1186 | |
c5aa993b JM |
1187 | /* Member function fields array, entries are allocated in the order they |
1188 | are encountered in the object file. */ | |
1189 | struct nextfnfield | |
1190 | { | |
1191 | struct nextfnfield *next; | |
1192 | struct fn_field fnfield; | |
1193 | } | |
1194 | *fnfields; | |
c906108c | 1195 | |
c5aa993b JM |
1196 | /* Member function fieldlist array, contains name of possibly overloaded |
1197 | member function, number of overloaded member functions and a pointer | |
1198 | to the head of the member function field chain. */ | |
1199 | struct fnfieldlist | |
1200 | { | |
15d034d0 | 1201 | const char *name; |
c5aa993b JM |
1202 | int length; |
1203 | struct nextfnfield *head; | |
1204 | } | |
1205 | *fnfieldlists; | |
c906108c | 1206 | |
c5aa993b JM |
1207 | /* Number of entries in the fnfieldlists array. */ |
1208 | int nfnfields; | |
98751a41 JK |
1209 | |
1210 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1211 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1212 | struct typedef_field_list | |
1213 | { | |
1214 | struct typedef_field field; | |
1215 | struct typedef_field_list *next; | |
1216 | } | |
1217 | *typedef_field_list; | |
1218 | unsigned typedef_field_list_count; | |
c5aa993b | 1219 | }; |
c906108c | 1220 | |
10b3939b DJ |
1221 | /* One item on the queue of compilation units to read in full symbols |
1222 | for. */ | |
1223 | struct dwarf2_queue_item | |
1224 | { | |
1225 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1226 | enum language pretend_language; |
10b3939b DJ |
1227 | struct dwarf2_queue_item *next; |
1228 | }; | |
1229 | ||
1230 | /* The current queue. */ | |
1231 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1232 | ||
ae038cb0 DJ |
1233 | /* Loaded secondary compilation units are kept in memory until they |
1234 | have not been referenced for the processing of this many | |
1235 | compilation units. Set this to zero to disable caching. Cache | |
1236 | sizes of up to at least twenty will improve startup time for | |
1237 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1238 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1239 | static void |
1240 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1241 | struct cmd_list_element *c, const char *value) | |
1242 | { | |
3e43a32a MS |
1243 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1244 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1245 | value); |
1246 | } | |
4390d890 | 1247 | \f |
c906108c SS |
1248 | /* local function prototypes */ |
1249 | ||
a32a8923 DE |
1250 | static const char *get_section_name (const struct dwarf2_section_info *); |
1251 | ||
1252 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1253 | ||
4efb68b1 | 1254 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1255 | |
918dd910 JK |
1256 | static void dwarf2_find_base_address (struct die_info *die, |
1257 | struct dwarf2_cu *cu); | |
1258 | ||
0018ea6f DE |
1259 | static struct partial_symtab *create_partial_symtab |
1260 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1261 | ||
c67a9c90 | 1262 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1263 | |
72bf9492 DJ |
1264 | static void scan_partial_symbols (struct partial_die_info *, |
1265 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1266 | int, struct dwarf2_cu *); |
c906108c | 1267 | |
72bf9492 DJ |
1268 | static void add_partial_symbol (struct partial_die_info *, |
1269 | struct dwarf2_cu *); | |
63d06c5c | 1270 | |
72bf9492 DJ |
1271 | static void add_partial_namespace (struct partial_die_info *pdi, |
1272 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1273 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 1274 | |
5d7cb8df JK |
1275 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
1276 | CORE_ADDR *highpc, int need_pc, | |
1277 | struct dwarf2_cu *cu); | |
1278 | ||
72bf9492 DJ |
1279 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1280 | struct dwarf2_cu *cu); | |
91c24f0a | 1281 | |
bc30ff58 JB |
1282 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1283 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1284 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1285 | |
257e7a09 YQ |
1286 | static void dwarf2_read_symtab (struct partial_symtab *, |
1287 | struct objfile *); | |
c906108c | 1288 | |
a14ed312 | 1289 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1290 | |
433df2d4 DE |
1291 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1292 | (const struct abbrev_table *, unsigned int); | |
1293 | ||
1294 | static struct abbrev_table *abbrev_table_read_table | |
1295 | (struct dwarf2_section_info *, sect_offset); | |
1296 | ||
1297 | static void abbrev_table_free (struct abbrev_table *); | |
1298 | ||
f4dc4d17 DE |
1299 | static void abbrev_table_free_cleanup (void *); |
1300 | ||
dee91e82 DE |
1301 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1302 | struct dwarf2_section_info *); | |
c906108c | 1303 | |
f3dd6933 | 1304 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1305 | |
d521ce57 | 1306 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1307 | |
dee91e82 | 1308 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1309 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1310 | |
d521ce57 TT |
1311 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1312 | struct partial_die_info *, | |
1313 | struct abbrev_info *, | |
1314 | unsigned int, | |
1315 | const gdb_byte *); | |
c906108c | 1316 | |
36586728 | 1317 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1318 | struct dwarf2_cu *); |
72bf9492 DJ |
1319 | |
1320 | static void fixup_partial_die (struct partial_die_info *, | |
1321 | struct dwarf2_cu *); | |
1322 | ||
d521ce57 TT |
1323 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1324 | struct attribute *, struct attr_abbrev *, | |
1325 | const gdb_byte *); | |
a8329558 | 1326 | |
a1855c1d | 1327 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1328 | |
a1855c1d | 1329 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1330 | |
a1855c1d | 1331 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1332 | |
a1855c1d | 1333 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1334 | |
a1855c1d | 1335 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1336 | |
d521ce57 | 1337 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1338 | unsigned int *); |
c906108c | 1339 | |
d521ce57 | 1340 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1341 | |
1342 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1343 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1344 | unsigned int *, unsigned int *); |
613e1657 | 1345 | |
d521ce57 TT |
1346 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1347 | const struct comp_unit_head *, | |
c764a876 DE |
1348 | unsigned int *); |
1349 | ||
d521ce57 | 1350 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1351 | |
f4dc4d17 DE |
1352 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1353 | sect_offset); | |
1354 | ||
d521ce57 | 1355 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1356 | |
d521ce57 | 1357 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1358 | |
d521ce57 TT |
1359 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1360 | const struct comp_unit_head *, | |
1361 | unsigned int *); | |
4bdf3d34 | 1362 | |
d521ce57 | 1363 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1364 | |
d521ce57 | 1365 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1366 | |
d521ce57 | 1367 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1368 | |
d521ce57 TT |
1369 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1370 | const gdb_byte *, | |
3019eac3 DE |
1371 | unsigned int *); |
1372 | ||
d521ce57 TT |
1373 | static const char *read_str_index (const struct die_reader_specs *reader, |
1374 | struct dwarf2_cu *cu, ULONGEST str_index); | |
3019eac3 | 1375 | |
e142c38c | 1376 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1377 | |
e142c38c DJ |
1378 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1379 | struct dwarf2_cu *); | |
c906108c | 1380 | |
348e048f | 1381 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1382 | unsigned int); |
348e048f | 1383 | |
05cf31d1 JB |
1384 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1385 | struct dwarf2_cu *cu); | |
1386 | ||
e142c38c | 1387 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1388 | |
e142c38c | 1389 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1390 | struct dwarf2_cu **); |
63d06c5c | 1391 | |
debd256d JB |
1392 | static void free_line_header (struct line_header *lh); |
1393 | ||
3019eac3 DE |
1394 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1395 | struct dwarf2_cu *cu); | |
debd256d | 1396 | |
f3f5162e DE |
1397 | static void dwarf_decode_lines (struct line_header *, const char *, |
1398 | struct dwarf2_cu *, struct partial_symtab *, | |
1399 | int); | |
c906108c | 1400 | |
d521ce57 | 1401 | static void dwarf2_start_subfile (const char *, const char *, const char *); |
c906108c | 1402 | |
f4dc4d17 | 1403 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
15d034d0 | 1404 | const char *, const char *, CORE_ADDR); |
f4dc4d17 | 1405 | |
a14ed312 | 1406 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1407 | struct dwarf2_cu *); |
c906108c | 1408 | |
34eaf542 TT |
1409 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1410 | struct dwarf2_cu *, struct symbol *); | |
1411 | ||
ff39bb5e | 1412 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1413 | struct dwarf2_cu *); |
c906108c | 1414 | |
ff39bb5e | 1415 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1416 | struct type *type, |
1417 | const char *name, | |
1418 | struct obstack *obstack, | |
12df843f | 1419 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1420 | const gdb_byte **bytes, |
98bfdba5 | 1421 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1422 | |
e7c27a73 | 1423 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1424 | |
b4ba55a1 JB |
1425 | static int need_gnat_info (struct dwarf2_cu *); |
1426 | ||
3e43a32a MS |
1427 | static struct type *die_descriptive_type (struct die_info *, |
1428 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1429 | |
1430 | static void set_descriptive_type (struct type *, struct die_info *, | |
1431 | struct dwarf2_cu *); | |
1432 | ||
e7c27a73 DJ |
1433 | static struct type *die_containing_type (struct die_info *, |
1434 | struct dwarf2_cu *); | |
c906108c | 1435 | |
ff39bb5e | 1436 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1437 | struct dwarf2_cu *); |
c906108c | 1438 | |
f792889a | 1439 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1440 | |
673bfd45 DE |
1441 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1442 | ||
0d5cff50 | 1443 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1444 | |
6e70227d | 1445 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1446 | const char *suffix, int physname, |
1447 | struct dwarf2_cu *cu); | |
63d06c5c | 1448 | |
e7c27a73 | 1449 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1450 | |
348e048f DE |
1451 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1452 | ||
e7c27a73 | 1453 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1454 | |
e7c27a73 | 1455 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1456 | |
96408a79 SA |
1457 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1458 | ||
ff013f42 JK |
1459 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1460 | struct dwarf2_cu *, struct partial_symtab *); | |
1461 | ||
a14ed312 | 1462 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1463 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1464 | struct partial_symtab *); | |
c906108c | 1465 | |
fae299cd DC |
1466 | static void get_scope_pc_bounds (struct die_info *, |
1467 | CORE_ADDR *, CORE_ADDR *, | |
1468 | struct dwarf2_cu *); | |
1469 | ||
801e3a5b JB |
1470 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1471 | CORE_ADDR, struct dwarf2_cu *); | |
1472 | ||
a14ed312 | 1473 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1474 | struct dwarf2_cu *); |
c906108c | 1475 | |
a14ed312 | 1476 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1477 | struct type *, struct dwarf2_cu *); |
c906108c | 1478 | |
a14ed312 | 1479 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1480 | struct die_info *, struct type *, |
e7c27a73 | 1481 | struct dwarf2_cu *); |
c906108c | 1482 | |
a14ed312 | 1483 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1484 | struct type *, |
1485 | struct dwarf2_cu *); | |
c906108c | 1486 | |
134d01f1 | 1487 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1488 | |
e7c27a73 | 1489 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1490 | |
e7c27a73 | 1491 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1492 | |
5d7cb8df JK |
1493 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1494 | ||
27aa8d6a SW |
1495 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1496 | ||
f55ee35c JK |
1497 | static struct type *read_module_type (struct die_info *die, |
1498 | struct dwarf2_cu *cu); | |
1499 | ||
38d518c9 | 1500 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1501 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1502 | |
134d01f1 | 1503 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1504 | |
e7c27a73 | 1505 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1506 | |
6e70227d | 1507 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1508 | struct dwarf2_cu *); |
1509 | ||
bf6af496 | 1510 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1511 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1512 | struct die_info *); |
639d11d3 | 1513 | |
dee91e82 | 1514 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1515 | const gdb_byte *info_ptr, |
1516 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1517 | struct die_info *parent); |
1518 | ||
d521ce57 TT |
1519 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1520 | struct die_info **, const gdb_byte *, | |
1521 | int *, int); | |
3019eac3 | 1522 | |
d521ce57 TT |
1523 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1524 | struct die_info **, const gdb_byte *, | |
1525 | int *); | |
93311388 | 1526 | |
e7c27a73 | 1527 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1528 | |
15d034d0 TT |
1529 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1530 | struct obstack *); | |
71c25dea | 1531 | |
15d034d0 | 1532 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1533 | |
15d034d0 | 1534 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1535 | struct die_info *die, |
1536 | struct dwarf2_cu *cu); | |
1537 | ||
ca69b9e6 DE |
1538 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1539 | struct dwarf2_cu *cu); | |
1540 | ||
e142c38c | 1541 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1542 | struct dwarf2_cu **); |
9219021c | 1543 | |
f39c6ffd | 1544 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1545 | |
f39c6ffd | 1546 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1547 | |
f39c6ffd | 1548 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1549 | |
a14ed312 | 1550 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1551 | |
f39c6ffd | 1552 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1553 | |
f9aca02d | 1554 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1555 | |
d97bc12b DE |
1556 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1557 | ||
1558 | static void dump_die_for_error (struct die_info *); | |
1559 | ||
1560 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1561 | struct die_info *); | |
c906108c | 1562 | |
d97bc12b | 1563 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1564 | |
51545339 | 1565 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1566 | struct dwarf2_cu *); |
c906108c | 1567 | |
ff39bb5e | 1568 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1569 | |
ff39bb5e | 1570 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1571 | |
348e048f | 1572 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1573 | const struct attribute *, |
348e048f DE |
1574 | struct dwarf2_cu **); |
1575 | ||
10b3939b | 1576 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1577 | const struct attribute *, |
f2f0e013 | 1578 | struct dwarf2_cu **); |
c906108c | 1579 | |
348e048f | 1580 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1581 | const struct attribute *, |
348e048f DE |
1582 | struct dwarf2_cu **); |
1583 | ||
ac9ec31b DE |
1584 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1585 | struct dwarf2_cu *); | |
1586 | ||
1587 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1588 | const struct attribute *, |
ac9ec31b DE |
1589 | struct dwarf2_cu *); |
1590 | ||
e5fe5e75 | 1591 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1592 | |
52dc124a | 1593 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1594 | |
f4dc4d17 | 1595 | static struct type_unit_group *get_type_unit_group |
ff39bb5e | 1596 | (struct dwarf2_cu *, const struct attribute *); |
f4dc4d17 DE |
1597 | |
1598 | static void build_type_unit_groups (die_reader_func_ftype *, void *); | |
1599 | ||
c906108c SS |
1600 | /* memory allocation interface */ |
1601 | ||
7b5a2f43 | 1602 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1603 | |
b60c80d6 | 1604 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1605 | |
09262596 | 1606 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
15d034d0 | 1607 | const char *, int); |
2e276125 | 1608 | |
6e5a29e1 | 1609 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1610 | |
6e5a29e1 | 1611 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1612 | |
6e5a29e1 | 1613 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1614 | |
6e5a29e1 | 1615 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1616 | |
8cf6f0b1 TT |
1617 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1618 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1619 | const struct attribute *attr); |
8cf6f0b1 | 1620 | |
ff39bb5e | 1621 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1622 | struct symbol *sym, |
f1e6e072 TT |
1623 | struct dwarf2_cu *cu, |
1624 | int is_block); | |
4c2df51b | 1625 | |
d521ce57 TT |
1626 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1627 | const gdb_byte *info_ptr, | |
1628 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1629 | |
72bf9492 DJ |
1630 | static void free_stack_comp_unit (void *); |
1631 | ||
72bf9492 DJ |
1632 | static hashval_t partial_die_hash (const void *item); |
1633 | ||
1634 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1635 | ||
ae038cb0 | 1636 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1637 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1638 | |
9816fde3 | 1639 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1640 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1641 | |
1642 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1643 | struct die_info *comp_unit_die, |
1644 | enum language pretend_language); | |
93311388 | 1645 | |
68dc6402 | 1646 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1647 | |
1648 | static void free_cached_comp_units (void *); | |
1649 | ||
1650 | static void age_cached_comp_units (void); | |
1651 | ||
dee91e82 | 1652 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1653 | |
f792889a DJ |
1654 | static struct type *set_die_type (struct die_info *, struct type *, |
1655 | struct dwarf2_cu *); | |
1c379e20 | 1656 | |
ae038cb0 DJ |
1657 | static void create_all_comp_units (struct objfile *); |
1658 | ||
0e50663e | 1659 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1660 | |
95554aad TT |
1661 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1662 | enum language); | |
10b3939b | 1663 | |
95554aad TT |
1664 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1665 | enum language); | |
10b3939b | 1666 | |
f4dc4d17 DE |
1667 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1668 | enum language); | |
1669 | ||
10b3939b DJ |
1670 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1671 | struct dwarf2_per_cu_data *); | |
1672 | ||
ae038cb0 DJ |
1673 | static void dwarf2_mark (struct dwarf2_cu *); |
1674 | ||
1675 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1676 | ||
b64f50a1 | 1677 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1678 | struct dwarf2_per_cu_data *); |
673bfd45 | 1679 | |
f792889a | 1680 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1681 | |
9291a0cd TT |
1682 | static void dwarf2_release_queue (void *dummy); |
1683 | ||
95554aad TT |
1684 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1685 | enum language pretend_language); | |
1686 | ||
a0f42c21 | 1687 | static void process_queue (void); |
9291a0cd TT |
1688 | |
1689 | static void find_file_and_directory (struct die_info *die, | |
1690 | struct dwarf2_cu *cu, | |
15d034d0 | 1691 | const char **name, const char **comp_dir); |
9291a0cd TT |
1692 | |
1693 | static char *file_full_name (int file, struct line_header *lh, | |
1694 | const char *comp_dir); | |
1695 | ||
d521ce57 | 1696 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1697 | (struct comp_unit_head *header, |
1698 | struct dwarf2_section_info *section, | |
d521ce57 | 1699 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1700 | int is_debug_types_section); |
1701 | ||
fd820528 | 1702 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1703 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1704 | int use_existing_cu, int keep, | |
3019eac3 DE |
1705 | die_reader_func_ftype *die_reader_func, void *data); |
1706 | ||
dee91e82 DE |
1707 | static void init_cutu_and_read_dies_simple |
1708 | (struct dwarf2_per_cu_data *this_cu, | |
1709 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1710 | |
673bfd45 | 1711 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1712 | |
3019eac3 DE |
1713 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1714 | ||
57d63ce2 DE |
1715 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
1716 | (struct dwp_file *dwp_file, const char *comp_dir, | |
1717 | ULONGEST signature, int is_debug_types); | |
a2ce51a0 DE |
1718 | |
1719 | static struct dwp_file *get_dwp_file (void); | |
1720 | ||
3019eac3 | 1721 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1722 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1723 | |
1724 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1725 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1726 | |
89e63ee4 DE |
1727 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1728 | ||
3019eac3 DE |
1729 | static void free_dwo_file_cleanup (void *); |
1730 | ||
95554aad TT |
1731 | static void process_cu_includes (void); |
1732 | ||
1b80a9fa | 1733 | static void check_producer (struct dwarf2_cu *cu); |
4390d890 DE |
1734 | \f |
1735 | /* Various complaints about symbol reading that don't abort the process. */ | |
1736 | ||
1737 | static void | |
1738 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1739 | { | |
1740 | complaint (&symfile_complaints, | |
1741 | _("statement list doesn't fit in .debug_line section")); | |
1742 | } | |
1743 | ||
1744 | static void | |
1745 | dwarf2_debug_line_missing_file_complaint (void) | |
1746 | { | |
1747 | complaint (&symfile_complaints, | |
1748 | _(".debug_line section has line data without a file")); | |
1749 | } | |
1750 | ||
1751 | static void | |
1752 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1753 | { | |
1754 | complaint (&symfile_complaints, | |
1755 | _(".debug_line section has line " | |
1756 | "program sequence without an end")); | |
1757 | } | |
1758 | ||
1759 | static void | |
1760 | dwarf2_complex_location_expr_complaint (void) | |
1761 | { | |
1762 | complaint (&symfile_complaints, _("location expression too complex")); | |
1763 | } | |
1764 | ||
1765 | static void | |
1766 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1767 | int arg3) | |
1768 | { | |
1769 | complaint (&symfile_complaints, | |
1770 | _("const value length mismatch for '%s', got %d, expected %d"), | |
1771 | arg1, arg2, arg3); | |
1772 | } | |
1773 | ||
1774 | static void | |
1775 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
1776 | { | |
1777 | complaint (&symfile_complaints, | |
1778 | _("debug info runs off end of %s section" | |
1779 | " [in module %s]"), | |
a32a8923 DE |
1780 | get_section_name (section), |
1781 | get_section_file_name (section)); | |
4390d890 | 1782 | } |
1b80a9fa | 1783 | |
4390d890 DE |
1784 | static void |
1785 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
1786 | { | |
1787 | complaint (&symfile_complaints, | |
1788 | _("macro debug info contains a " | |
1789 | "malformed macro definition:\n`%s'"), | |
1790 | arg1); | |
1791 | } | |
1792 | ||
1793 | static void | |
1794 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1795 | { | |
1796 | complaint (&symfile_complaints, | |
1797 | _("invalid attribute class or form for '%s' in '%s'"), | |
1798 | arg1, arg2); | |
1799 | } | |
1800 | \f | |
9291a0cd TT |
1801 | #if WORDS_BIGENDIAN |
1802 | ||
1803 | /* Convert VALUE between big- and little-endian. */ | |
1804 | static offset_type | |
1805 | byte_swap (offset_type value) | |
1806 | { | |
1807 | offset_type result; | |
1808 | ||
1809 | result = (value & 0xff) << 24; | |
1810 | result |= (value & 0xff00) << 8; | |
1811 | result |= (value & 0xff0000) >> 8; | |
1812 | result |= (value & 0xff000000) >> 24; | |
1813 | return result; | |
1814 | } | |
1815 | ||
1816 | #define MAYBE_SWAP(V) byte_swap (V) | |
1817 | ||
1818 | #else | |
1819 | #define MAYBE_SWAP(V) (V) | |
1820 | #endif /* WORDS_BIGENDIAN */ | |
1821 | ||
1822 | /* The suffix for an index file. */ | |
1823 | #define INDEX_SUFFIX ".gdb-index" | |
1824 | ||
c906108c | 1825 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1826 | information and return true if we have enough to do something. |
1827 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1828 | ELF names are used. */ | |
c906108c SS |
1829 | |
1830 | int | |
251d32d9 TG |
1831 | dwarf2_has_info (struct objfile *objfile, |
1832 | const struct dwarf2_debug_sections *names) | |
c906108c | 1833 | { |
be391dca TT |
1834 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1835 | if (!dwarf2_per_objfile) | |
1836 | { | |
1837 | /* Initialize per-objfile state. */ | |
1838 | struct dwarf2_per_objfile *data | |
1839 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1840 | |
be391dca TT |
1841 | memset (data, 0, sizeof (*data)); |
1842 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1843 | dwarf2_per_objfile = data; | |
6502dd73 | 1844 | |
251d32d9 TG |
1845 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1846 | (void *) names); | |
be391dca TT |
1847 | dwarf2_per_objfile->objfile = objfile; |
1848 | } | |
1849 | return (dwarf2_per_objfile->info.asection != NULL | |
1850 | && dwarf2_per_objfile->abbrev.asection != NULL); | |
c906108c SS |
1851 | } |
1852 | ||
a32a8923 DE |
1853 | /* Return the bfd owner of SECTION. */ |
1854 | ||
1855 | static struct bfd * | |
1856 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
1857 | { | |
1858 | return section->asection->owner; | |
1859 | } | |
1860 | ||
1861 | /* Return the bfd section of SECTION. | |
1862 | Returns NULL if the section is not present. */ | |
1863 | ||
1864 | static asection * | |
1865 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
1866 | { | |
1867 | return section->asection; | |
1868 | } | |
1869 | ||
1870 | /* Return the name of SECTION. */ | |
1871 | ||
1872 | static const char * | |
1873 | get_section_name (const struct dwarf2_section_info *section) | |
1874 | { | |
1875 | asection *sectp = get_section_bfd_section (section); | |
1876 | ||
1877 | gdb_assert (sectp != NULL); | |
1878 | return bfd_section_name (get_section_bfd_owner (section), sectp); | |
1879 | } | |
1880 | ||
1881 | /* Return the name of the file SECTION is in. */ | |
1882 | ||
1883 | static const char * | |
1884 | get_section_file_name (const struct dwarf2_section_info *section) | |
1885 | { | |
1886 | bfd *abfd = get_section_bfd_owner (section); | |
1887 | ||
1888 | return bfd_get_filename (abfd); | |
1889 | } | |
1890 | ||
1891 | /* Return the id of SECTION. | |
1892 | Returns 0 if SECTION doesn't exist. */ | |
1893 | ||
1894 | static int | |
1895 | get_section_id (const struct dwarf2_section_info *section) | |
1896 | { | |
1897 | asection *sectp = get_section_bfd_section (section); | |
1898 | ||
1899 | if (sectp == NULL) | |
1900 | return 0; | |
1901 | return sectp->id; | |
1902 | } | |
1903 | ||
1904 | /* Return the flags of SECTION. | |
1905 | SECTION must exist. */ | |
1906 | ||
1907 | static int | |
1908 | get_section_flags (const struct dwarf2_section_info *section) | |
1909 | { | |
1910 | asection *sectp = get_section_bfd_section (section); | |
1911 | ||
1912 | gdb_assert (sectp != NULL); | |
1913 | return bfd_get_section_flags (sectp->owner, sectp); | |
1914 | } | |
1915 | ||
251d32d9 TG |
1916 | /* When loading sections, we look either for uncompressed section or for |
1917 | compressed section names. */ | |
233a11ab CS |
1918 | |
1919 | static int | |
251d32d9 TG |
1920 | section_is_p (const char *section_name, |
1921 | const struct dwarf2_section_names *names) | |
233a11ab | 1922 | { |
251d32d9 TG |
1923 | if (names->normal != NULL |
1924 | && strcmp (section_name, names->normal) == 0) | |
1925 | return 1; | |
1926 | if (names->compressed != NULL | |
1927 | && strcmp (section_name, names->compressed) == 0) | |
1928 | return 1; | |
1929 | return 0; | |
233a11ab CS |
1930 | } |
1931 | ||
c906108c SS |
1932 | /* This function is mapped across the sections and remembers the |
1933 | offset and size of each of the debugging sections we are interested | |
1934 | in. */ | |
1935 | ||
1936 | static void | |
251d32d9 | 1937 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 1938 | { |
251d32d9 | 1939 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 1940 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
1941 | |
1942 | if (vnames == NULL) | |
1943 | names = &dwarf2_elf_names; | |
1944 | else | |
1945 | names = (const struct dwarf2_debug_sections *) vnames; | |
1946 | ||
dc7650b8 JK |
1947 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1948 | { | |
1949 | } | |
1950 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 1951 | { |
dce234bc PP |
1952 | dwarf2_per_objfile->info.asection = sectp; |
1953 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); | |
c906108c | 1954 | } |
251d32d9 | 1955 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 1956 | { |
dce234bc PP |
1957 | dwarf2_per_objfile->abbrev.asection = sectp; |
1958 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 1959 | } |
251d32d9 | 1960 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 1961 | { |
dce234bc PP |
1962 | dwarf2_per_objfile->line.asection = sectp; |
1963 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); | |
c906108c | 1964 | } |
251d32d9 | 1965 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 1966 | { |
dce234bc PP |
1967 | dwarf2_per_objfile->loc.asection = sectp; |
1968 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); | |
c906108c | 1969 | } |
251d32d9 | 1970 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 1971 | { |
dce234bc PP |
1972 | dwarf2_per_objfile->macinfo.asection = sectp; |
1973 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 1974 | } |
cf2c3c16 TT |
1975 | else if (section_is_p (sectp->name, &names->macro)) |
1976 | { | |
1977 | dwarf2_per_objfile->macro.asection = sectp; | |
1978 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); | |
1979 | } | |
251d32d9 | 1980 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 1981 | { |
dce234bc PP |
1982 | dwarf2_per_objfile->str.asection = sectp; |
1983 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); | |
c906108c | 1984 | } |
3019eac3 DE |
1985 | else if (section_is_p (sectp->name, &names->addr)) |
1986 | { | |
1987 | dwarf2_per_objfile->addr.asection = sectp; | |
1988 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); | |
1989 | } | |
251d32d9 | 1990 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 1991 | { |
dce234bc PP |
1992 | dwarf2_per_objfile->frame.asection = sectp; |
1993 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1994 | } |
251d32d9 | 1995 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 1996 | { |
dc7650b8 JK |
1997 | dwarf2_per_objfile->eh_frame.asection = sectp; |
1998 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1999 | } |
251d32d9 | 2000 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 2001 | { |
dce234bc PP |
2002 | dwarf2_per_objfile->ranges.asection = sectp; |
2003 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 2004 | } |
251d32d9 | 2005 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 2006 | { |
8b70b953 TT |
2007 | struct dwarf2_section_info type_section; |
2008 | ||
2009 | memset (&type_section, 0, sizeof (type_section)); | |
2010 | type_section.asection = sectp; | |
2011 | type_section.size = bfd_get_section_size (sectp); | |
2012 | ||
2013 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
2014 | &type_section); | |
348e048f | 2015 | } |
251d32d9 | 2016 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd TT |
2017 | { |
2018 | dwarf2_per_objfile->gdb_index.asection = sectp; | |
2019 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); | |
2020 | } | |
dce234bc | 2021 | |
72dca2f5 FR |
2022 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
2023 | && bfd_section_vma (abfd, sectp) == 0) | |
2024 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
2025 | } |
2026 | ||
fceca515 DE |
2027 | /* A helper function that decides whether a section is empty, |
2028 | or not present. */ | |
9e0ac564 TT |
2029 | |
2030 | static int | |
19ac8c2e | 2031 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2032 | { |
19ac8c2e | 2033 | return section->asection == NULL || section->size == 0; |
9e0ac564 TT |
2034 | } |
2035 | ||
3019eac3 DE |
2036 | /* Read the contents of the section INFO. |
2037 | OBJFILE is the main object file, but not necessarily the file where | |
a32a8923 DE |
2038 | the section comes from. E.g., for DWO files the bfd of INFO is the bfd |
2039 | of the DWO file. | |
dce234bc | 2040 | If the section is compressed, uncompress it before returning. */ |
c906108c | 2041 | |
dce234bc PP |
2042 | static void |
2043 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 2044 | { |
a32a8923 | 2045 | asection *sectp; |
3019eac3 | 2046 | bfd *abfd; |
dce234bc | 2047 | gdb_byte *buf, *retbuf; |
c906108c | 2048 | |
be391dca TT |
2049 | if (info->readin) |
2050 | return; | |
dce234bc | 2051 | info->buffer = NULL; |
be391dca | 2052 | info->readin = 1; |
188dd5d6 | 2053 | |
9e0ac564 | 2054 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2055 | return; |
c906108c | 2056 | |
a32a8923 | 2057 | sectp = get_section_bfd_section (info); |
3019eac3 | 2058 | |
4bf44c1c TT |
2059 | /* If the section has relocations, we must read it ourselves. |
2060 | Otherwise we attach it to the BFD. */ | |
2061 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2062 | { |
d521ce57 | 2063 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2064 | return; |
dce234bc | 2065 | } |
dce234bc | 2066 | |
4bf44c1c TT |
2067 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
2068 | info->buffer = buf; | |
dce234bc PP |
2069 | |
2070 | /* When debugging .o files, we may need to apply relocations; see | |
2071 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2072 | We never compress sections in .o files, so we only need to | |
2073 | try this when the section is not compressed. */ | |
ac8035ab | 2074 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2075 | if (retbuf != NULL) |
2076 | { | |
2077 | info->buffer = retbuf; | |
2078 | return; | |
2079 | } | |
2080 | ||
a32a8923 DE |
2081 | abfd = get_section_bfd_owner (info); |
2082 | gdb_assert (abfd != NULL); | |
2083 | ||
dce234bc PP |
2084 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2085 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2086 | { |
2087 | error (_("Dwarf Error: Can't read DWARF data" | |
2088 | " in section %s [in module %s]"), | |
2089 | bfd_section_name (abfd, sectp), bfd_get_filename (abfd)); | |
2090 | } | |
dce234bc PP |
2091 | } |
2092 | ||
9e0ac564 TT |
2093 | /* A helper function that returns the size of a section in a safe way. |
2094 | If you are positive that the section has been read before using the | |
2095 | size, then it is safe to refer to the dwarf2_section_info object's | |
2096 | "size" field directly. In other cases, you must call this | |
2097 | function, because for compressed sections the size field is not set | |
2098 | correctly until the section has been read. */ | |
2099 | ||
2100 | static bfd_size_type | |
2101 | dwarf2_section_size (struct objfile *objfile, | |
2102 | struct dwarf2_section_info *info) | |
2103 | { | |
2104 | if (!info->readin) | |
2105 | dwarf2_read_section (objfile, info); | |
2106 | return info->size; | |
2107 | } | |
2108 | ||
dce234bc | 2109 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2110 | SECTION_NAME. */ |
af34e669 | 2111 | |
dce234bc | 2112 | void |
3017a003 TG |
2113 | dwarf2_get_section_info (struct objfile *objfile, |
2114 | enum dwarf2_section_enum sect, | |
d521ce57 | 2115 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2116 | bfd_size_type *sizep) |
2117 | { | |
2118 | struct dwarf2_per_objfile *data | |
2119 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
2120 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
2121 | |
2122 | /* We may see an objfile without any DWARF, in which case we just | |
2123 | return nothing. */ | |
2124 | if (data == NULL) | |
2125 | { | |
2126 | *sectp = NULL; | |
2127 | *bufp = NULL; | |
2128 | *sizep = 0; | |
2129 | return; | |
2130 | } | |
3017a003 TG |
2131 | switch (sect) |
2132 | { | |
2133 | case DWARF2_DEBUG_FRAME: | |
2134 | info = &data->frame; | |
2135 | break; | |
2136 | case DWARF2_EH_FRAME: | |
2137 | info = &data->eh_frame; | |
2138 | break; | |
2139 | default: | |
2140 | gdb_assert_not_reached ("unexpected section"); | |
2141 | } | |
dce234bc | 2142 | |
9e0ac564 | 2143 | dwarf2_read_section (objfile, info); |
dce234bc | 2144 | |
a32a8923 | 2145 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2146 | *bufp = info->buffer; |
2147 | *sizep = info->size; | |
2148 | } | |
2149 | ||
36586728 TT |
2150 | /* A helper function to find the sections for a .dwz file. */ |
2151 | ||
2152 | static void | |
2153 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2154 | { | |
2155 | struct dwz_file *dwz_file = arg; | |
2156 | ||
2157 | /* Note that we only support the standard ELF names, because .dwz | |
2158 | is ELF-only (at the time of writing). */ | |
2159 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2160 | { | |
2161 | dwz_file->abbrev.asection = sectp; | |
2162 | dwz_file->abbrev.size = bfd_get_section_size (sectp); | |
2163 | } | |
2164 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2165 | { | |
2166 | dwz_file->info.asection = sectp; | |
2167 | dwz_file->info.size = bfd_get_section_size (sectp); | |
2168 | } | |
2169 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2170 | { | |
2171 | dwz_file->str.asection = sectp; | |
2172 | dwz_file->str.size = bfd_get_section_size (sectp); | |
2173 | } | |
2174 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2175 | { | |
2176 | dwz_file->line.asection = sectp; | |
2177 | dwz_file->line.size = bfd_get_section_size (sectp); | |
2178 | } | |
2179 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2180 | { | |
2181 | dwz_file->macro.asection = sectp; | |
2182 | dwz_file->macro.size = bfd_get_section_size (sectp); | |
2183 | } | |
2ec9a5e0 TT |
2184 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2185 | { | |
2186 | dwz_file->gdb_index.asection = sectp; | |
2187 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); | |
2188 | } | |
36586728 TT |
2189 | } |
2190 | ||
4db1a1dc TT |
2191 | /* Open the separate '.dwz' debug file, if needed. Return NULL if |
2192 | there is no .gnu_debugaltlink section in the file. Error if there | |
2193 | is such a section but the file cannot be found. */ | |
36586728 TT |
2194 | |
2195 | static struct dwz_file * | |
2196 | dwarf2_get_dwz_file (void) | |
2197 | { | |
4db1a1dc TT |
2198 | bfd *dwz_bfd; |
2199 | char *data; | |
36586728 TT |
2200 | struct cleanup *cleanup; |
2201 | const char *filename; | |
2202 | struct dwz_file *result; | |
4db1a1dc | 2203 | unsigned long buildid; |
36586728 TT |
2204 | |
2205 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2206 | return dwarf2_per_objfile->dwz_file; | |
2207 | ||
4db1a1dc TT |
2208 | bfd_set_error (bfd_error_no_error); |
2209 | data = bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2210 | &buildid); | |
2211 | if (data == NULL) | |
2212 | { | |
2213 | if (bfd_get_error () == bfd_error_no_error) | |
2214 | return NULL; | |
2215 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2216 | bfd_errmsg (bfd_get_error ())); | |
2217 | } | |
36586728 TT |
2218 | cleanup = make_cleanup (xfree, data); |
2219 | ||
f9d83a0b | 2220 | filename = (const char *) data; |
36586728 TT |
2221 | if (!IS_ABSOLUTE_PATH (filename)) |
2222 | { | |
4262abfb | 2223 | char *abs = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); |
36586728 TT |
2224 | char *rel; |
2225 | ||
2226 | make_cleanup (xfree, abs); | |
2227 | abs = ldirname (abs); | |
2228 | make_cleanup (xfree, abs); | |
2229 | ||
2230 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2231 | make_cleanup (xfree, rel); | |
2232 | filename = rel; | |
2233 | } | |
2234 | ||
2235 | /* The format is just a NUL-terminated file name, followed by the | |
2236 | build-id. For now, though, we ignore the build-id. */ | |
2237 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); | |
2238 | if (dwz_bfd == NULL) | |
2239 | error (_("could not read '%s': %s"), filename, | |
2240 | bfd_errmsg (bfd_get_error ())); | |
2241 | ||
2242 | if (!bfd_check_format (dwz_bfd, bfd_object)) | |
2243 | { | |
2244 | gdb_bfd_unref (dwz_bfd); | |
2245 | error (_("file '%s' was not usable: %s"), filename, | |
2246 | bfd_errmsg (bfd_get_error ())); | |
2247 | } | |
2248 | ||
2249 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, | |
2250 | struct dwz_file); | |
2251 | result->dwz_bfd = dwz_bfd; | |
2252 | ||
2253 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2254 | ||
2255 | do_cleanups (cleanup); | |
2256 | ||
8d2cc612 | 2257 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2258 | return result; |
2259 | } | |
9291a0cd | 2260 | \f |
7b9f3c50 DE |
2261 | /* DWARF quick_symbols_functions support. */ |
2262 | ||
2263 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2264 | unique line tables, so we maintain a separate table of all .debug_line | |
2265 | derived entries to support the sharing. | |
2266 | All the quick functions need is the list of file names. We discard the | |
2267 | line_header when we're done and don't need to record it here. */ | |
2268 | struct quick_file_names | |
2269 | { | |
094b34ac DE |
2270 | /* The data used to construct the hash key. */ |
2271 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2272 | |
2273 | /* The number of entries in file_names, real_names. */ | |
2274 | unsigned int num_file_names; | |
2275 | ||
2276 | /* The file names from the line table, after being run through | |
2277 | file_full_name. */ | |
2278 | const char **file_names; | |
2279 | ||
2280 | /* The file names from the line table after being run through | |
2281 | gdb_realpath. These are computed lazily. */ | |
2282 | const char **real_names; | |
2283 | }; | |
2284 | ||
2285 | /* When using the index (and thus not using psymtabs), each CU has an | |
2286 | object of this type. This is used to hold information needed by | |
2287 | the various "quick" methods. */ | |
2288 | struct dwarf2_per_cu_quick_data | |
2289 | { | |
2290 | /* The file table. This can be NULL if there was no file table | |
2291 | or it's currently not read in. | |
2292 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2293 | struct quick_file_names *file_names; | |
2294 | ||
2295 | /* The corresponding symbol table. This is NULL if symbols for this | |
2296 | CU have not yet been read. */ | |
2297 | struct symtab *symtab; | |
2298 | ||
2299 | /* A temporary mark bit used when iterating over all CUs in | |
2300 | expand_symtabs_matching. */ | |
2301 | unsigned int mark : 1; | |
2302 | ||
2303 | /* True if we've tried to read the file table and found there isn't one. | |
2304 | There will be no point in trying to read it again next time. */ | |
2305 | unsigned int no_file_data : 1; | |
2306 | }; | |
2307 | ||
094b34ac DE |
2308 | /* Utility hash function for a stmt_list_hash. */ |
2309 | ||
2310 | static hashval_t | |
2311 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2312 | { | |
2313 | hashval_t v = 0; | |
2314 | ||
2315 | if (stmt_list_hash->dwo_unit != NULL) | |
2316 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2317 | v += stmt_list_hash->line_offset.sect_off; | |
2318 | return v; | |
2319 | } | |
2320 | ||
2321 | /* Utility equality function for a stmt_list_hash. */ | |
2322 | ||
2323 | static int | |
2324 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2325 | const struct stmt_list_hash *rhs) | |
2326 | { | |
2327 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2328 | return 0; | |
2329 | if (lhs->dwo_unit != NULL | |
2330 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2331 | return 0; | |
2332 | ||
2333 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2334 | } | |
2335 | ||
7b9f3c50 DE |
2336 | /* Hash function for a quick_file_names. */ |
2337 | ||
2338 | static hashval_t | |
2339 | hash_file_name_entry (const void *e) | |
2340 | { | |
2341 | const struct quick_file_names *file_data = e; | |
2342 | ||
094b34ac | 2343 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2344 | } |
2345 | ||
2346 | /* Equality function for a quick_file_names. */ | |
2347 | ||
2348 | static int | |
2349 | eq_file_name_entry (const void *a, const void *b) | |
2350 | { | |
2351 | const struct quick_file_names *ea = a; | |
2352 | const struct quick_file_names *eb = b; | |
2353 | ||
094b34ac | 2354 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2355 | } |
2356 | ||
2357 | /* Delete function for a quick_file_names. */ | |
2358 | ||
2359 | static void | |
2360 | delete_file_name_entry (void *e) | |
2361 | { | |
2362 | struct quick_file_names *file_data = e; | |
2363 | int i; | |
2364 | ||
2365 | for (i = 0; i < file_data->num_file_names; ++i) | |
2366 | { | |
2367 | xfree ((void*) file_data->file_names[i]); | |
2368 | if (file_data->real_names) | |
2369 | xfree ((void*) file_data->real_names[i]); | |
2370 | } | |
2371 | ||
2372 | /* The space for the struct itself lives on objfile_obstack, | |
2373 | so we don't free it here. */ | |
2374 | } | |
2375 | ||
2376 | /* Create a quick_file_names hash table. */ | |
2377 | ||
2378 | static htab_t | |
2379 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2380 | { | |
2381 | return htab_create_alloc (nr_initial_entries, | |
2382 | hash_file_name_entry, eq_file_name_entry, | |
2383 | delete_file_name_entry, xcalloc, xfree); | |
2384 | } | |
9291a0cd | 2385 | |
918dd910 JK |
2386 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2387 | have to be created afterwards. You should call age_cached_comp_units after | |
2388 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2389 | ||
2390 | static void | |
2391 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2392 | { | |
3019eac3 | 2393 | if (per_cu->is_debug_types) |
e5fe5e75 | 2394 | load_full_type_unit (per_cu); |
918dd910 | 2395 | else |
95554aad | 2396 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2397 | |
918dd910 | 2398 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2399 | |
2400 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2401 | } |
2402 | ||
a0f42c21 | 2403 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2404 | |
9291a0cd | 2405 | static void |
a0f42c21 | 2406 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2407 | { |
2408 | struct cleanup *back_to; | |
2409 | ||
f4dc4d17 DE |
2410 | /* Skip type_unit_groups, reading the type units they contain |
2411 | is handled elsewhere. */ | |
2412 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2413 | return; | |
2414 | ||
9291a0cd TT |
2415 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2416 | ||
95554aad TT |
2417 | if (dwarf2_per_objfile->using_index |
2418 | ? per_cu->v.quick->symtab == NULL | |
2419 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2420 | { | |
2421 | queue_comp_unit (per_cu, language_minimal); | |
2422 | load_cu (per_cu); | |
89e63ee4 DE |
2423 | |
2424 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2425 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2426 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2427 | if (!per_cu->is_debug_types | |
2428 | && per_cu->cu->dwo_unit != NULL | |
2429 | && dwarf2_per_objfile->index_table != NULL | |
2430 | && dwarf2_per_objfile->index_table->version <= 7 | |
2431 | /* DWP files aren't supported yet. */ | |
2432 | && get_dwp_file () == NULL) | |
2433 | queue_and_load_all_dwo_tus (per_cu); | |
95554aad | 2434 | } |
9291a0cd | 2435 | |
a0f42c21 | 2436 | process_queue (); |
9291a0cd TT |
2437 | |
2438 | /* Age the cache, releasing compilation units that have not | |
2439 | been used recently. */ | |
2440 | age_cached_comp_units (); | |
2441 | ||
2442 | do_cleanups (back_to); | |
2443 | } | |
2444 | ||
2445 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2446 | the objfile from which this CU came. Returns the resulting symbol | |
2447 | table. */ | |
2fdf6df6 | 2448 | |
9291a0cd | 2449 | static struct symtab * |
a0f42c21 | 2450 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2451 | { |
95554aad | 2452 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2453 | if (!per_cu->v.quick->symtab) |
2454 | { | |
2455 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2456 | increment_reading_symtab (); | |
a0f42c21 | 2457 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2458 | process_cu_includes (); |
9291a0cd TT |
2459 | do_cleanups (back_to); |
2460 | } | |
2461 | return per_cu->v.quick->symtab; | |
2462 | } | |
2463 | ||
f4dc4d17 DE |
2464 | /* Return the CU given its index. |
2465 | ||
2466 | This is intended for loops like: | |
2467 | ||
2468 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2469 | + dwarf2_per_objfile->n_type_units); ++i) | |
2470 | { | |
2471 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
2472 | ||
2473 | ...; | |
2474 | } | |
2475 | */ | |
2fdf6df6 | 2476 | |
1fd400ff TT |
2477 | static struct dwarf2_per_cu_data * |
2478 | dw2_get_cu (int index) | |
2479 | { | |
2480 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2481 | { | |
f4dc4d17 | 2482 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2483 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2484 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2485 | } |
2486 | ||
2487 | return dwarf2_per_objfile->all_comp_units[index]; | |
2488 | } | |
2489 | ||
2490 | /* Return the primary CU given its index. | |
2491 | The difference between this function and dw2_get_cu is in the handling | |
2492 | of type units (TUs). Here we return the type_unit_group object. | |
2493 | ||
2494 | This is intended for loops like: | |
2495 | ||
2496 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2497 | + dwarf2_per_objfile->n_type_unit_groups); ++i) | |
2498 | { | |
2499 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); | |
2500 | ||
2501 | ...; | |
2502 | } | |
2503 | */ | |
2504 | ||
2505 | static struct dwarf2_per_cu_data * | |
2506 | dw2_get_primary_cu (int index) | |
2507 | { | |
2508 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2509 | { | |
1fd400ff | 2510 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2511 | gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups); |
2512 | return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu; | |
1fd400ff | 2513 | } |
f4dc4d17 | 2514 | |
1fd400ff TT |
2515 | return dwarf2_per_objfile->all_comp_units[index]; |
2516 | } | |
2517 | ||
2ec9a5e0 TT |
2518 | /* A helper for create_cus_from_index that handles a given list of |
2519 | CUs. */ | |
2fdf6df6 | 2520 | |
74a0d9f6 | 2521 | static void |
2ec9a5e0 TT |
2522 | create_cus_from_index_list (struct objfile *objfile, |
2523 | const gdb_byte *cu_list, offset_type n_elements, | |
2524 | struct dwarf2_section_info *section, | |
2525 | int is_dwz, | |
2526 | int base_offset) | |
9291a0cd TT |
2527 | { |
2528 | offset_type i; | |
9291a0cd | 2529 | |
2ec9a5e0 | 2530 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2531 | { |
2532 | struct dwarf2_per_cu_data *the_cu; | |
2533 | ULONGEST offset, length; | |
2534 | ||
74a0d9f6 JK |
2535 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2536 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2537 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2538 | cu_list += 2 * 8; |
2539 | ||
2540 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2541 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2542 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2543 | the_cu->length = length; |
2544 | the_cu->objfile = objfile; | |
8a0459fd | 2545 | the_cu->section = section; |
9291a0cd TT |
2546 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2547 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2548 | the_cu->is_dwz = is_dwz; |
2549 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2550 | } |
9291a0cd TT |
2551 | } |
2552 | ||
2ec9a5e0 | 2553 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2554 | the CU objects for this objfile. */ |
2ec9a5e0 | 2555 | |
74a0d9f6 | 2556 | static void |
2ec9a5e0 TT |
2557 | create_cus_from_index (struct objfile *objfile, |
2558 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2559 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2560 | { | |
2561 | struct dwz_file *dwz; | |
2562 | ||
2563 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2564 | dwarf2_per_objfile->all_comp_units | |
2565 | = obstack_alloc (&objfile->objfile_obstack, | |
2566 | dwarf2_per_objfile->n_comp_units | |
2567 | * sizeof (struct dwarf2_per_cu_data *)); | |
2568 | ||
74a0d9f6 JK |
2569 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2570 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2571 | |
2572 | if (dwz_elements == 0) | |
74a0d9f6 | 2573 | return; |
2ec9a5e0 TT |
2574 | |
2575 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2576 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2577 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2578 | } |
2579 | ||
1fd400ff | 2580 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2581 | |
74a0d9f6 | 2582 | static void |
673bfd45 | 2583 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2584 | struct dwarf2_section_info *section, |
673bfd45 DE |
2585 | const gdb_byte *bytes, |
2586 | offset_type elements) | |
1fd400ff TT |
2587 | { |
2588 | offset_type i; | |
673bfd45 | 2589 | htab_t sig_types_hash; |
1fd400ff | 2590 | |
d467dd73 DE |
2591 | dwarf2_per_objfile->n_type_units = elements / 3; |
2592 | dwarf2_per_objfile->all_type_units | |
a2ce51a0 DE |
2593 | = xmalloc (dwarf2_per_objfile->n_type_units |
2594 | * sizeof (struct signatured_type *)); | |
1fd400ff | 2595 | |
673bfd45 | 2596 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2597 | |
2598 | for (i = 0; i < elements; i += 3) | |
2599 | { | |
52dc124a DE |
2600 | struct signatured_type *sig_type; |
2601 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2602 | void **slot; |
2603 | ||
74a0d9f6 JK |
2604 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2605 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2606 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2607 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2608 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2609 | bytes += 3 * 8; | |
2610 | ||
52dc124a | 2611 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2612 | struct signatured_type); |
52dc124a | 2613 | sig_type->signature = signature; |
3019eac3 DE |
2614 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2615 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2616 | sig_type->per_cu.section = section; |
52dc124a DE |
2617 | sig_type->per_cu.offset.sect_off = offset; |
2618 | sig_type->per_cu.objfile = objfile; | |
2619 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2620 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2621 | struct dwarf2_per_cu_quick_data); | |
2622 | ||
52dc124a DE |
2623 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2624 | *slot = sig_type; | |
1fd400ff | 2625 | |
b4dd5633 | 2626 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2627 | } |
2628 | ||
673bfd45 | 2629 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2630 | } |
2631 | ||
9291a0cd TT |
2632 | /* Read the address map data from the mapped index, and use it to |
2633 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2634 | |
9291a0cd TT |
2635 | static void |
2636 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2637 | { | |
2638 | const gdb_byte *iter, *end; | |
2639 | struct obstack temp_obstack; | |
2640 | struct addrmap *mutable_map; | |
2641 | struct cleanup *cleanup; | |
2642 | CORE_ADDR baseaddr; | |
2643 | ||
2644 | obstack_init (&temp_obstack); | |
2645 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2646 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2647 | ||
2648 | iter = index->address_table; | |
2649 | end = iter + index->address_table_size; | |
2650 | ||
2651 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2652 | ||
2653 | while (iter < end) | |
2654 | { | |
2655 | ULONGEST hi, lo, cu_index; | |
2656 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2657 | iter += 8; | |
2658 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2659 | iter += 8; | |
2660 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2661 | iter += 4; | |
f652bce2 | 2662 | |
24a55014 | 2663 | if (lo > hi) |
f652bce2 | 2664 | { |
24a55014 DE |
2665 | complaint (&symfile_complaints, |
2666 | _(".gdb_index address table has invalid range (%s - %s)"), | |
c0cd8254 | 2667 | hex_string (lo), hex_string (hi)); |
24a55014 | 2668 | continue; |
f652bce2 | 2669 | } |
24a55014 DE |
2670 | |
2671 | if (cu_index >= dwarf2_per_objfile->n_comp_units) | |
f652bce2 DE |
2672 | { |
2673 | complaint (&symfile_complaints, | |
2674 | _(".gdb_index address table has invalid CU number %u"), | |
2675 | (unsigned) cu_index); | |
24a55014 | 2676 | continue; |
f652bce2 | 2677 | } |
24a55014 DE |
2678 | |
2679 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
2680 | dw2_get_cu (cu_index)); | |
9291a0cd TT |
2681 | } |
2682 | ||
2683 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2684 | &objfile->objfile_obstack); | |
2685 | do_cleanups (cleanup); | |
2686 | } | |
2687 | ||
59d7bcaf JK |
2688 | /* The hash function for strings in the mapped index. This is the same as |
2689 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2690 | implementation. This is necessary because the hash function is tied to the | |
2691 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2692 | SYMBOL_HASH_NEXT. |
2693 | ||
2694 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2695 | |
9291a0cd | 2696 | static hashval_t |
559a7a62 | 2697 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2698 | { |
2699 | const unsigned char *str = (const unsigned char *) p; | |
2700 | hashval_t r = 0; | |
2701 | unsigned char c; | |
2702 | ||
2703 | while ((c = *str++) != 0) | |
559a7a62 JK |
2704 | { |
2705 | if (index_version >= 5) | |
2706 | c = tolower (c); | |
2707 | r = r * 67 + c - 113; | |
2708 | } | |
9291a0cd TT |
2709 | |
2710 | return r; | |
2711 | } | |
2712 | ||
2713 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2714 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2715 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2716 | |
9291a0cd TT |
2717 | static int |
2718 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2719 | offset_type **vec_out) | |
2720 | { | |
0cf03b49 JK |
2721 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2722 | offset_type hash; | |
9291a0cd | 2723 | offset_type slot, step; |
559a7a62 | 2724 | int (*cmp) (const char *, const char *); |
9291a0cd | 2725 | |
0cf03b49 JK |
2726 | if (current_language->la_language == language_cplus |
2727 | || current_language->la_language == language_java | |
2728 | || current_language->la_language == language_fortran) | |
2729 | { | |
2730 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2731 | not contain any. */ | |
2732 | const char *paren = strchr (name, '('); | |
2733 | ||
2734 | if (paren) | |
2735 | { | |
2736 | char *dup; | |
2737 | ||
2738 | dup = xmalloc (paren - name + 1); | |
2739 | memcpy (dup, name, paren - name); | |
2740 | dup[paren - name] = 0; | |
2741 | ||
2742 | make_cleanup (xfree, dup); | |
2743 | name = dup; | |
2744 | } | |
2745 | } | |
2746 | ||
559a7a62 | 2747 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2748 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2749 | simulate our NAME being searched is also lowercased. */ |
2750 | hash = mapped_index_string_hash ((index->version == 4 | |
2751 | && case_sensitivity == case_sensitive_off | |
2752 | ? 5 : index->version), | |
2753 | name); | |
2754 | ||
3876f04e DE |
2755 | slot = hash & (index->symbol_table_slots - 1); |
2756 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2757 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2758 | |
2759 | for (;;) | |
2760 | { | |
2761 | /* Convert a slot number to an offset into the table. */ | |
2762 | offset_type i = 2 * slot; | |
2763 | const char *str; | |
3876f04e | 2764 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2765 | { |
2766 | do_cleanups (back_to); | |
2767 | return 0; | |
2768 | } | |
9291a0cd | 2769 | |
3876f04e | 2770 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2771 | if (!cmp (name, str)) |
9291a0cd TT |
2772 | { |
2773 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2774 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2775 | do_cleanups (back_to); |
9291a0cd TT |
2776 | return 1; |
2777 | } | |
2778 | ||
3876f04e | 2779 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2780 | } |
2781 | } | |
2782 | ||
2ec9a5e0 TT |
2783 | /* A helper function that reads the .gdb_index from SECTION and fills |
2784 | in MAP. FILENAME is the name of the file containing the section; | |
2785 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2786 | ok to use deprecated sections. | |
2787 | ||
2788 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2789 | out parameters that are filled in with information about the CU and | |
2790 | TU lists in the section. | |
2791 | ||
2792 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 2793 | |
9291a0cd | 2794 | static int |
2ec9a5e0 TT |
2795 | read_index_from_section (struct objfile *objfile, |
2796 | const char *filename, | |
2797 | int deprecated_ok, | |
2798 | struct dwarf2_section_info *section, | |
2799 | struct mapped_index *map, | |
2800 | const gdb_byte **cu_list, | |
2801 | offset_type *cu_list_elements, | |
2802 | const gdb_byte **types_list, | |
2803 | offset_type *types_list_elements) | |
9291a0cd | 2804 | { |
948f8e3d | 2805 | const gdb_byte *addr; |
2ec9a5e0 | 2806 | offset_type version; |
b3b272e1 | 2807 | offset_type *metadata; |
1fd400ff | 2808 | int i; |
9291a0cd | 2809 | |
2ec9a5e0 | 2810 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 2811 | return 0; |
82430852 JK |
2812 | |
2813 | /* Older elfutils strip versions could keep the section in the main | |
2814 | executable while splitting it for the separate debug info file. */ | |
a32a8923 | 2815 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
2816 | return 0; |
2817 | ||
2ec9a5e0 | 2818 | dwarf2_read_section (objfile, section); |
9291a0cd | 2819 | |
2ec9a5e0 | 2820 | addr = section->buffer; |
9291a0cd | 2821 | /* Version check. */ |
1fd400ff | 2822 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2823 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2824 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2825 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2826 | indices. */ |
831adc1f | 2827 | if (version < 4) |
481860b3 GB |
2828 | { |
2829 | static int warning_printed = 0; | |
2830 | if (!warning_printed) | |
2831 | { | |
2832 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2833 | filename); |
481860b3 GB |
2834 | warning_printed = 1; |
2835 | } | |
2836 | return 0; | |
2837 | } | |
2838 | /* Index version 4 uses a different hash function than index version | |
2839 | 5 and later. | |
2840 | ||
2841 | Versions earlier than 6 did not emit psymbols for inlined | |
2842 | functions. Using these files will cause GDB not to be able to | |
2843 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2844 | indices unless the user has done |
2845 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2846 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2847 | { |
2848 | static int warning_printed = 0; | |
2849 | if (!warning_printed) | |
2850 | { | |
e615022a DE |
2851 | warning (_("\ |
2852 | Skipping deprecated .gdb_index section in %s.\n\ | |
2853 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2854 | to use the section anyway."), | |
2ec9a5e0 | 2855 | filename); |
481860b3 GB |
2856 | warning_printed = 1; |
2857 | } | |
2858 | return 0; | |
2859 | } | |
796a7ff8 DE |
2860 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
2861 | of the TU (for symbols coming from TUs). It's just a performance bug, and | |
2862 | we can't distinguish gdb-generated indices from gold-generated ones, so | |
2863 | nothing to do here. */ | |
2864 | ||
481860b3 | 2865 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2866 | longer backward compatible. */ |
796a7ff8 | 2867 | if (version > 8) |
594e8718 | 2868 | return 0; |
9291a0cd | 2869 | |
559a7a62 | 2870 | map->version = version; |
2ec9a5e0 | 2871 | map->total_size = section->size; |
9291a0cd TT |
2872 | |
2873 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
2874 | |
2875 | i = 0; | |
2ec9a5e0 TT |
2876 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2877 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2878 | / 8); | |
1fd400ff TT |
2879 | ++i; |
2880 | ||
2ec9a5e0 TT |
2881 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2882 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2883 | - MAYBE_SWAP (metadata[i])) | |
2884 | / 8); | |
987d643c | 2885 | ++i; |
1fd400ff TT |
2886 | |
2887 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
2888 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
2889 | - MAYBE_SWAP (metadata[i])); | |
2890 | ++i; | |
2891 | ||
3876f04e DE |
2892 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
2893 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
2894 | - MAYBE_SWAP (metadata[i])) | |
2895 | / (2 * sizeof (offset_type))); | |
1fd400ff | 2896 | ++i; |
9291a0cd | 2897 | |
f9d83a0b | 2898 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 2899 | |
2ec9a5e0 TT |
2900 | return 1; |
2901 | } | |
2902 | ||
2903 | ||
2904 | /* Read the index file. If everything went ok, initialize the "quick" | |
2905 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
2906 | ||
2907 | static int | |
2908 | dwarf2_read_index (struct objfile *objfile) | |
2909 | { | |
2910 | struct mapped_index local_map, *map; | |
2911 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
2912 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 2913 | struct dwz_file *dwz; |
2ec9a5e0 | 2914 | |
4262abfb | 2915 | if (!read_index_from_section (objfile, objfile_name (objfile), |
2ec9a5e0 TT |
2916 | use_deprecated_index_sections, |
2917 | &dwarf2_per_objfile->gdb_index, &local_map, | |
2918 | &cu_list, &cu_list_elements, | |
2919 | &types_list, &types_list_elements)) | |
2920 | return 0; | |
2921 | ||
0fefef59 | 2922 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 2923 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
2924 | return 0; |
2925 | ||
2ec9a5e0 TT |
2926 | /* If there is a .dwz file, read it so we can get its CU list as |
2927 | well. */ | |
4db1a1dc TT |
2928 | dwz = dwarf2_get_dwz_file (); |
2929 | if (dwz != NULL) | |
2ec9a5e0 | 2930 | { |
2ec9a5e0 TT |
2931 | struct mapped_index dwz_map; |
2932 | const gdb_byte *dwz_types_ignore; | |
2933 | offset_type dwz_types_elements_ignore; | |
2934 | ||
2935 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
2936 | 1, | |
2937 | &dwz->gdb_index, &dwz_map, | |
2938 | &dwz_list, &dwz_list_elements, | |
2939 | &dwz_types_ignore, | |
2940 | &dwz_types_elements_ignore)) | |
2941 | { | |
2942 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
2943 | bfd_get_filename (dwz->dwz_bfd)); | |
2944 | return 0; | |
2945 | } | |
2946 | } | |
2947 | ||
74a0d9f6 JK |
2948 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
2949 | dwz_list_elements); | |
1fd400ff | 2950 | |
8b70b953 TT |
2951 | if (types_list_elements) |
2952 | { | |
2953 | struct dwarf2_section_info *section; | |
2954 | ||
2955 | /* We can only handle a single .debug_types when we have an | |
2956 | index. */ | |
2957 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
2958 | return 0; | |
2959 | ||
2960 | section = VEC_index (dwarf2_section_info_def, | |
2961 | dwarf2_per_objfile->types, 0); | |
2962 | ||
74a0d9f6 JK |
2963 | create_signatured_type_table_from_index (objfile, section, types_list, |
2964 | types_list_elements); | |
8b70b953 | 2965 | } |
9291a0cd | 2966 | |
2ec9a5e0 TT |
2967 | create_addrmap_from_index (objfile, &local_map); |
2968 | ||
2969 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
2970 | *map = local_map; | |
9291a0cd TT |
2971 | |
2972 | dwarf2_per_objfile->index_table = map; | |
2973 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
2974 | dwarf2_per_objfile->quick_file_names_table = |
2975 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
2976 | |
2977 | return 1; | |
2978 | } | |
2979 | ||
2980 | /* A helper for the "quick" functions which sets the global | |
2981 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 2982 | |
9291a0cd TT |
2983 | static void |
2984 | dw2_setup (struct objfile *objfile) | |
2985 | { | |
2986 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
2987 | gdb_assert (dwarf2_per_objfile); | |
2988 | } | |
2989 | ||
dee91e82 | 2990 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 2991 | |
dee91e82 DE |
2992 | static void |
2993 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 2994 | const gdb_byte *info_ptr, |
dee91e82 DE |
2995 | struct die_info *comp_unit_die, |
2996 | int has_children, | |
2997 | void *data) | |
9291a0cd | 2998 | { |
dee91e82 DE |
2999 | struct dwarf2_cu *cu = reader->cu; |
3000 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
3001 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 3002 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 3003 | struct line_header *lh; |
9291a0cd | 3004 | struct attribute *attr; |
dee91e82 | 3005 | int i; |
15d034d0 | 3006 | const char *name, *comp_dir; |
7b9f3c50 DE |
3007 | void **slot; |
3008 | struct quick_file_names *qfn; | |
3009 | unsigned int line_offset; | |
9291a0cd | 3010 | |
0186c6a7 DE |
3011 | gdb_assert (! this_cu->is_debug_types); |
3012 | ||
07261596 TT |
3013 | /* Our callers never want to match partial units -- instead they |
3014 | will match the enclosing full CU. */ | |
3015 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3016 | { | |
3017 | this_cu->v.quick->no_file_data = 1; | |
3018 | return; | |
3019 | } | |
3020 | ||
0186c6a7 | 3021 | lh_cu = this_cu; |
7b9f3c50 DE |
3022 | lh = NULL; |
3023 | slot = NULL; | |
3024 | line_offset = 0; | |
dee91e82 DE |
3025 | |
3026 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
3027 | if (attr) |
3028 | { | |
7b9f3c50 DE |
3029 | struct quick_file_names find_entry; |
3030 | ||
3031 | line_offset = DW_UNSND (attr); | |
3032 | ||
3033 | /* We may have already read in this line header (TU line header sharing). | |
3034 | If we have we're done. */ | |
094b34ac DE |
3035 | find_entry.hash.dwo_unit = cu->dwo_unit; |
3036 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3037 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3038 | &find_entry, INSERT); | |
3039 | if (*slot != NULL) | |
3040 | { | |
094b34ac | 3041 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 3042 | return; |
7b9f3c50 DE |
3043 | } |
3044 | ||
3019eac3 | 3045 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3046 | } |
3047 | if (lh == NULL) | |
3048 | { | |
094b34ac | 3049 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3050 | return; |
9291a0cd TT |
3051 | } |
3052 | ||
7b9f3c50 | 3053 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
3054 | qfn->hash.dwo_unit = cu->dwo_unit; |
3055 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
3056 | gdb_assert (slot != NULL); |
3057 | *slot = qfn; | |
9291a0cd | 3058 | |
dee91e82 | 3059 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 3060 | |
7b9f3c50 DE |
3061 | qfn->num_file_names = lh->num_file_names; |
3062 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
3063 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 3064 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
3065 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
3066 | qfn->real_names = NULL; | |
9291a0cd | 3067 | |
7b9f3c50 | 3068 | free_line_header (lh); |
7b9f3c50 | 3069 | |
094b34ac | 3070 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3071 | } |
3072 | ||
3073 | /* A helper for the "quick" functions which attempts to read the line | |
3074 | table for THIS_CU. */ | |
3075 | ||
3076 | static struct quick_file_names * | |
e4a48d9d | 3077 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3078 | { |
0186c6a7 DE |
3079 | /* This should never be called for TUs. */ |
3080 | gdb_assert (! this_cu->is_debug_types); | |
3081 | /* Nor type unit groups. */ | |
3082 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3083 | |
dee91e82 DE |
3084 | if (this_cu->v.quick->file_names != NULL) |
3085 | return this_cu->v.quick->file_names; | |
3086 | /* If we know there is no line data, no point in looking again. */ | |
3087 | if (this_cu->v.quick->no_file_data) | |
3088 | return NULL; | |
3089 | ||
0186c6a7 | 3090 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3091 | |
3092 | if (this_cu->v.quick->no_file_data) | |
3093 | return NULL; | |
3094 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3095 | } |
3096 | ||
3097 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3098 | real path for a given file name from the line table. */ |
2fdf6df6 | 3099 | |
9291a0cd | 3100 | static const char * |
7b9f3c50 DE |
3101 | dw2_get_real_path (struct objfile *objfile, |
3102 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3103 | { |
7b9f3c50 DE |
3104 | if (qfn->real_names == NULL) |
3105 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
3106 | qfn->num_file_names, sizeof (char *)); | |
9291a0cd | 3107 | |
7b9f3c50 DE |
3108 | if (qfn->real_names[index] == NULL) |
3109 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 3110 | |
7b9f3c50 | 3111 | return qfn->real_names[index]; |
9291a0cd TT |
3112 | } |
3113 | ||
3114 | static struct symtab * | |
3115 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3116 | { | |
3117 | int index; | |
ae2de4f8 | 3118 | |
9291a0cd TT |
3119 | dw2_setup (objfile); |
3120 | index = dwarf2_per_objfile->n_comp_units - 1; | |
a0f42c21 | 3121 | return dw2_instantiate_symtab (dw2_get_cu (index)); |
9291a0cd TT |
3122 | } |
3123 | ||
7b9f3c50 DE |
3124 | /* Traversal function for dw2_forget_cached_source_info. */ |
3125 | ||
3126 | static int | |
3127 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3128 | { |
7b9f3c50 | 3129 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3130 | |
7b9f3c50 | 3131 | if (file_data->real_names) |
9291a0cd | 3132 | { |
7b9f3c50 | 3133 | int i; |
9291a0cd | 3134 | |
7b9f3c50 | 3135 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3136 | { |
7b9f3c50 DE |
3137 | xfree ((void*) file_data->real_names[i]); |
3138 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3139 | } |
3140 | } | |
7b9f3c50 DE |
3141 | |
3142 | return 1; | |
3143 | } | |
3144 | ||
3145 | static void | |
3146 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3147 | { | |
3148 | dw2_setup (objfile); | |
3149 | ||
3150 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3151 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3152 | } |
3153 | ||
f8eba3c6 TT |
3154 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3155 | the symtabs and calls the iterator. */ | |
3156 | ||
3157 | static int | |
3158 | dw2_map_expand_apply (struct objfile *objfile, | |
3159 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3160 | const char *name, const char *real_path, |
f8eba3c6 TT |
3161 | int (*callback) (struct symtab *, void *), |
3162 | void *data) | |
3163 | { | |
3164 | struct symtab *last_made = objfile->symtabs; | |
3165 | ||
3166 | /* Don't visit already-expanded CUs. */ | |
3167 | if (per_cu->v.quick->symtab) | |
3168 | return 0; | |
3169 | ||
3170 | /* This may expand more than one symtab, and we want to iterate over | |
3171 | all of them. */ | |
a0f42c21 | 3172 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3173 | |
f5b95b50 | 3174 | return iterate_over_some_symtabs (name, real_path, callback, data, |
f8eba3c6 TT |
3175 | objfile->symtabs, last_made); |
3176 | } | |
3177 | ||
3178 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3179 | ||
9291a0cd | 3180 | static int |
f8eba3c6 | 3181 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3182 | const char *real_path, |
f8eba3c6 TT |
3183 | int (*callback) (struct symtab *, void *), |
3184 | void *data) | |
9291a0cd TT |
3185 | { |
3186 | int i; | |
c011a4f4 | 3187 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3188 | |
3189 | dw2_setup (objfile); | |
ae2de4f8 | 3190 | |
848e3e78 DE |
3191 | /* The rule is CUs specify all the files, including those used by |
3192 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3193 | |
848e3e78 | 3194 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3195 | { |
3196 | int j; | |
f4dc4d17 | 3197 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3198 | struct quick_file_names *file_data; |
9291a0cd | 3199 | |
3d7bb9d9 | 3200 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3201 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3202 | continue; |
3203 | ||
e4a48d9d | 3204 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3205 | if (file_data == NULL) |
9291a0cd TT |
3206 | continue; |
3207 | ||
7b9f3c50 | 3208 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3209 | { |
7b9f3c50 | 3210 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3211 | const char *this_real_name; |
9291a0cd | 3212 | |
af529f8f | 3213 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3214 | { |
f5b95b50 | 3215 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3216 | callback, data)) |
3217 | return 1; | |
288e77a7 | 3218 | continue; |
4aac40c8 | 3219 | } |
9291a0cd | 3220 | |
c011a4f4 DE |
3221 | /* Before we invoke realpath, which can get expensive when many |
3222 | files are involved, do a quick comparison of the basenames. */ | |
3223 | if (! basenames_may_differ | |
3224 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3225 | continue; | |
3226 | ||
da235a7c JK |
3227 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3228 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3229 | { |
da235a7c JK |
3230 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3231 | callback, data)) | |
3232 | return 1; | |
288e77a7 | 3233 | continue; |
da235a7c | 3234 | } |
9291a0cd | 3235 | |
da235a7c JK |
3236 | if (real_path != NULL) |
3237 | { | |
af529f8f JK |
3238 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3239 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3240 | if (this_real_name != NULL |
af529f8f | 3241 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3242 | { |
f5b95b50 | 3243 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3244 | callback, data)) |
3245 | return 1; | |
288e77a7 | 3246 | continue; |
9291a0cd TT |
3247 | } |
3248 | } | |
3249 | } | |
3250 | } | |
3251 | ||
9291a0cd TT |
3252 | return 0; |
3253 | } | |
3254 | ||
da51c347 DE |
3255 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3256 | ||
3257 | struct dw2_symtab_iterator | |
9291a0cd | 3258 | { |
da51c347 DE |
3259 | /* The internalized form of .gdb_index. */ |
3260 | struct mapped_index *index; | |
3261 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3262 | int want_specific_block; | |
3263 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3264 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3265 | int block_index; | |
3266 | /* The kind of symbol we're looking for. */ | |
3267 | domain_enum domain; | |
3268 | /* The list of CUs from the index entry of the symbol, | |
3269 | or NULL if not found. */ | |
3270 | offset_type *vec; | |
3271 | /* The next element in VEC to look at. */ | |
3272 | int next; | |
3273 | /* The number of elements in VEC, or zero if there is no match. */ | |
3274 | int length; | |
3275 | }; | |
9291a0cd | 3276 | |
da51c347 DE |
3277 | /* Initialize the index symtab iterator ITER. |
3278 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3279 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3280 | |
9291a0cd | 3281 | static void |
da51c347 DE |
3282 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3283 | struct mapped_index *index, | |
3284 | int want_specific_block, | |
3285 | int block_index, | |
3286 | domain_enum domain, | |
3287 | const char *name) | |
3288 | { | |
3289 | iter->index = index; | |
3290 | iter->want_specific_block = want_specific_block; | |
3291 | iter->block_index = block_index; | |
3292 | iter->domain = domain; | |
3293 | iter->next = 0; | |
3294 | ||
3295 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3296 | iter->length = MAYBE_SWAP (*iter->vec); | |
3297 | else | |
3298 | { | |
3299 | iter->vec = NULL; | |
3300 | iter->length = 0; | |
3301 | } | |
3302 | } | |
3303 | ||
3304 | /* Return the next matching CU or NULL if there are no more. */ | |
3305 | ||
3306 | static struct dwarf2_per_cu_data * | |
3307 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3308 | { | |
3309 | for ( ; iter->next < iter->length; ++iter->next) | |
3310 | { | |
3311 | offset_type cu_index_and_attrs = | |
3312 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3313 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 | 3314 | struct dwarf2_per_cu_data *per_cu; |
da51c347 DE |
3315 | int want_static = iter->block_index != GLOBAL_BLOCK; |
3316 | /* This value is only valid for index versions >= 7. */ | |
3317 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3318 | gdb_index_symbol_kind symbol_kind = | |
3319 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3320 | /* Only check the symbol attributes if they're present. | |
3321 | Indices prior to version 7 don't record them, | |
3322 | and indices >= 7 may elide them for certain symbols | |
3323 | (gold does this). */ | |
3324 | int attrs_valid = | |
3325 | (iter->index->version >= 7 | |
3326 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3327 | ||
3190f0c6 DE |
3328 | /* Don't crash on bad data. */ |
3329 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3330 | + dwarf2_per_objfile->n_type_units)) | |
3331 | { | |
3332 | complaint (&symfile_complaints, | |
3333 | _(".gdb_index entry has bad CU index" | |
4262abfb JK |
3334 | " [in module %s]"), |
3335 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3336 | continue; |
3337 | } | |
3338 | ||
3339 | per_cu = dw2_get_cu (cu_index); | |
3340 | ||
da51c347 DE |
3341 | /* Skip if already read in. */ |
3342 | if (per_cu->v.quick->symtab) | |
3343 | continue; | |
3344 | ||
3345 | if (attrs_valid | |
3346 | && iter->want_specific_block | |
3347 | && want_static != is_static) | |
3348 | continue; | |
3349 | ||
3350 | /* Only check the symbol's kind if it has one. */ | |
3351 | if (attrs_valid) | |
3352 | { | |
3353 | switch (iter->domain) | |
3354 | { | |
3355 | case VAR_DOMAIN: | |
3356 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3357 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3358 | /* Some types are also in VAR_DOMAIN. */ | |
3359 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3360 | continue; | |
3361 | break; | |
3362 | case STRUCT_DOMAIN: | |
3363 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3364 | continue; | |
3365 | break; | |
3366 | case LABEL_DOMAIN: | |
3367 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3368 | continue; | |
3369 | break; | |
3370 | default: | |
3371 | break; | |
3372 | } | |
3373 | } | |
3374 | ||
3375 | ++iter->next; | |
3376 | return per_cu; | |
3377 | } | |
3378 | ||
3379 | return NULL; | |
3380 | } | |
3381 | ||
3382 | static struct symtab * | |
3383 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3384 | const char *name, domain_enum domain) | |
9291a0cd | 3385 | { |
da51c347 | 3386 | struct symtab *stab_best = NULL; |
156942c7 DE |
3387 | struct mapped_index *index; |
3388 | ||
9291a0cd TT |
3389 | dw2_setup (objfile); |
3390 | ||
156942c7 DE |
3391 | index = dwarf2_per_objfile->index_table; |
3392 | ||
da51c347 | 3393 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3394 | if (index) |
9291a0cd | 3395 | { |
da51c347 DE |
3396 | struct dw2_symtab_iterator iter; |
3397 | struct dwarf2_per_cu_data *per_cu; | |
3398 | ||
3399 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3400 | |
da51c347 | 3401 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3402 | { |
da51c347 DE |
3403 | struct symbol *sym = NULL; |
3404 | struct symtab *stab = dw2_instantiate_symtab (per_cu); | |
3405 | ||
3406 | /* Some caution must be observed with overloaded functions | |
3407 | and methods, since the index will not contain any overload | |
3408 | information (but NAME might contain it). */ | |
3409 | if (stab->primary) | |
9291a0cd | 3410 | { |
da51c347 DE |
3411 | struct blockvector *bv = BLOCKVECTOR (stab); |
3412 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
156942c7 | 3413 | |
da51c347 DE |
3414 | sym = lookup_block_symbol (block, name, domain); |
3415 | } | |
1fd400ff | 3416 | |
da51c347 DE |
3417 | if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) |
3418 | { | |
3419 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) | |
3420 | return stab; | |
3421 | ||
3422 | stab_best = stab; | |
9291a0cd | 3423 | } |
da51c347 DE |
3424 | |
3425 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3426 | } |
3427 | } | |
9291a0cd | 3428 | |
da51c347 | 3429 | return stab_best; |
9291a0cd TT |
3430 | } |
3431 | ||
3432 | static void | |
3433 | dw2_print_stats (struct objfile *objfile) | |
3434 | { | |
e4a48d9d | 3435 | int i, total, count; |
9291a0cd TT |
3436 | |
3437 | dw2_setup (objfile); | |
e4a48d9d | 3438 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3439 | count = 0; |
e4a48d9d | 3440 | for (i = 0; i < total; ++i) |
9291a0cd | 3441 | { |
e254ef6a | 3442 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3443 | |
e254ef6a | 3444 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3445 | ++count; |
3446 | } | |
e4a48d9d | 3447 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3448 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3449 | } | |
3450 | ||
779bd270 DE |
3451 | /* This dumps minimal information about the index. |
3452 | It is called via "mt print objfiles". | |
3453 | One use is to verify .gdb_index has been loaded by the | |
3454 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3455 | ||
9291a0cd TT |
3456 | static void |
3457 | dw2_dump (struct objfile *objfile) | |
3458 | { | |
779bd270 DE |
3459 | dw2_setup (objfile); |
3460 | gdb_assert (dwarf2_per_objfile->using_index); | |
3461 | printf_filtered (".gdb_index:"); | |
3462 | if (dwarf2_per_objfile->index_table != NULL) | |
3463 | { | |
3464 | printf_filtered (" version %d\n", | |
3465 | dwarf2_per_objfile->index_table->version); | |
3466 | } | |
3467 | else | |
3468 | printf_filtered (" faked for \"readnow\"\n"); | |
3469 | printf_filtered ("\n"); | |
9291a0cd TT |
3470 | } |
3471 | ||
3472 | static void | |
3189cb12 DE |
3473 | dw2_relocate (struct objfile *objfile, |
3474 | const struct section_offsets *new_offsets, | |
3475 | const struct section_offsets *delta) | |
9291a0cd TT |
3476 | { |
3477 | /* There's nothing to relocate here. */ | |
3478 | } | |
3479 | ||
3480 | static void | |
3481 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3482 | const char *func_name) | |
3483 | { | |
da51c347 DE |
3484 | struct mapped_index *index; |
3485 | ||
3486 | dw2_setup (objfile); | |
3487 | ||
3488 | index = dwarf2_per_objfile->index_table; | |
3489 | ||
3490 | /* index is NULL if OBJF_READNOW. */ | |
3491 | if (index) | |
3492 | { | |
3493 | struct dw2_symtab_iterator iter; | |
3494 | struct dwarf2_per_cu_data *per_cu; | |
3495 | ||
3496 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3497 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3498 | func_name); | |
3499 | ||
3500 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3501 | dw2_instantiate_symtab (per_cu); | |
3502 | } | |
9291a0cd TT |
3503 | } |
3504 | ||
3505 | static void | |
3506 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3507 | { | |
3508 | int i; | |
3509 | ||
3510 | dw2_setup (objfile); | |
1fd400ff TT |
3511 | |
3512 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3513 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3514 | { |
e254ef6a | 3515 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3516 | |
a0f42c21 | 3517 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3518 | } |
3519 | } | |
3520 | ||
3521 | static void | |
652a8996 JK |
3522 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3523 | const char *fullname) | |
9291a0cd TT |
3524 | { |
3525 | int i; | |
3526 | ||
3527 | dw2_setup (objfile); | |
d4637a04 DE |
3528 | |
3529 | /* We don't need to consider type units here. | |
3530 | This is only called for examining code, e.g. expand_line_sal. | |
3531 | There can be an order of magnitude (or more) more type units | |
3532 | than comp units, and we avoid them if we can. */ | |
3533 | ||
3534 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3535 | { |
3536 | int j; | |
e254ef6a | 3537 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3538 | struct quick_file_names *file_data; |
9291a0cd | 3539 | |
3d7bb9d9 | 3540 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3541 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3542 | continue; |
3543 | ||
e4a48d9d | 3544 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3545 | if (file_data == NULL) |
9291a0cd TT |
3546 | continue; |
3547 | ||
7b9f3c50 | 3548 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3549 | { |
652a8996 JK |
3550 | const char *this_fullname = file_data->file_names[j]; |
3551 | ||
3552 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3553 | { |
a0f42c21 | 3554 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3555 | break; |
3556 | } | |
3557 | } | |
3558 | } | |
3559 | } | |
3560 | ||
9291a0cd | 3561 | static void |
ade7ed9e DE |
3562 | dw2_map_matching_symbols (struct objfile *objfile, |
3563 | const char * name, domain_enum namespace, | |
3564 | int global, | |
40658b94 PH |
3565 | int (*callback) (struct block *, |
3566 | struct symbol *, void *), | |
2edb89d3 JK |
3567 | void *data, symbol_compare_ftype *match, |
3568 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3569 | { |
40658b94 | 3570 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3571 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3572 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3573 | } |
3574 | ||
3575 | static void | |
f8eba3c6 TT |
3576 | dw2_expand_symtabs_matching |
3577 | (struct objfile *objfile, | |
fbd9ab74 | 3578 | int (*file_matcher) (const char *, void *, int basenames), |
e078317b | 3579 | int (*name_matcher) (const char *, void *), |
f8eba3c6 TT |
3580 | enum search_domain kind, |
3581 | void *data) | |
9291a0cd TT |
3582 | { |
3583 | int i; | |
3584 | offset_type iter; | |
4b5246aa | 3585 | struct mapped_index *index; |
9291a0cd TT |
3586 | |
3587 | dw2_setup (objfile); | |
ae2de4f8 DE |
3588 | |
3589 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3590 | if (!dwarf2_per_objfile->index_table) |
3591 | return; | |
4b5246aa | 3592 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3593 | |
7b08b9eb | 3594 | if (file_matcher != NULL) |
24c79950 TT |
3595 | { |
3596 | struct cleanup *cleanup; | |
3597 | htab_t visited_found, visited_not_found; | |
3598 | ||
3599 | visited_found = htab_create_alloc (10, | |
3600 | htab_hash_pointer, htab_eq_pointer, | |
3601 | NULL, xcalloc, xfree); | |
3602 | cleanup = make_cleanup_htab_delete (visited_found); | |
3603 | visited_not_found = htab_create_alloc (10, | |
3604 | htab_hash_pointer, htab_eq_pointer, | |
3605 | NULL, xcalloc, xfree); | |
3606 | make_cleanup_htab_delete (visited_not_found); | |
3607 | ||
848e3e78 DE |
3608 | /* The rule is CUs specify all the files, including those used by |
3609 | any TU, so there's no need to scan TUs here. */ | |
3610 | ||
3611 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3612 | { |
3613 | int j; | |
f4dc4d17 | 3614 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
24c79950 TT |
3615 | struct quick_file_names *file_data; |
3616 | void **slot; | |
7b08b9eb | 3617 | |
24c79950 | 3618 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3619 | |
24c79950 TT |
3620 | /* We only need to look at symtabs not already expanded. */ |
3621 | if (per_cu->v.quick->symtab) | |
3622 | continue; | |
7b08b9eb | 3623 | |
e4a48d9d | 3624 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3625 | if (file_data == NULL) |
3626 | continue; | |
7b08b9eb | 3627 | |
24c79950 TT |
3628 | if (htab_find (visited_not_found, file_data) != NULL) |
3629 | continue; | |
3630 | else if (htab_find (visited_found, file_data) != NULL) | |
3631 | { | |
3632 | per_cu->v.quick->mark = 1; | |
3633 | continue; | |
3634 | } | |
3635 | ||
3636 | for (j = 0; j < file_data->num_file_names; ++j) | |
3637 | { | |
da235a7c JK |
3638 | const char *this_real_name; |
3639 | ||
fbd9ab74 | 3640 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3641 | { |
3642 | per_cu->v.quick->mark = 1; | |
3643 | break; | |
3644 | } | |
da235a7c JK |
3645 | |
3646 | /* Before we invoke realpath, which can get expensive when many | |
3647 | files are involved, do a quick comparison of the basenames. */ | |
3648 | if (!basenames_may_differ | |
3649 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3650 | data, 1)) | |
3651 | continue; | |
3652 | ||
3653 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3654 | if (file_matcher (this_real_name, data, 0)) | |
3655 | { | |
3656 | per_cu->v.quick->mark = 1; | |
3657 | break; | |
3658 | } | |
24c79950 TT |
3659 | } |
3660 | ||
3661 | slot = htab_find_slot (per_cu->v.quick->mark | |
3662 | ? visited_found | |
3663 | : visited_not_found, | |
3664 | file_data, INSERT); | |
3665 | *slot = file_data; | |
3666 | } | |
3667 | ||
3668 | do_cleanups (cleanup); | |
3669 | } | |
9291a0cd | 3670 | |
3876f04e | 3671 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3672 | { |
3673 | offset_type idx = 2 * iter; | |
3674 | const char *name; | |
3675 | offset_type *vec, vec_len, vec_idx; | |
3676 | ||
3876f04e | 3677 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3678 | continue; |
3679 | ||
3876f04e | 3680 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3681 | |
e078317b | 3682 | if (! (*name_matcher) (name, data)) |
9291a0cd TT |
3683 | continue; |
3684 | ||
3685 | /* The name was matched, now expand corresponding CUs that were | |
3686 | marked. */ | |
4b5246aa | 3687 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3688 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3689 | vec_len = MAYBE_SWAP (vec[0]); |
3690 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3691 | { | |
e254ef6a | 3692 | struct dwarf2_per_cu_data *per_cu; |
156942c7 DE |
3693 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
3694 | gdb_index_symbol_kind symbol_kind = | |
3695 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3696 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3190f0c6 DE |
3697 | /* Only check the symbol attributes if they're present. |
3698 | Indices prior to version 7 don't record them, | |
3699 | and indices >= 7 may elide them for certain symbols | |
3700 | (gold does this). */ | |
3701 | int attrs_valid = | |
3702 | (index->version >= 7 | |
3703 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3704 | ||
3705 | /* Only check the symbol's kind if it has one. */ | |
3706 | if (attrs_valid) | |
156942c7 DE |
3707 | { |
3708 | switch (kind) | |
3709 | { | |
3710 | case VARIABLES_DOMAIN: | |
3711 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3712 | continue; | |
3713 | break; | |
3714 | case FUNCTIONS_DOMAIN: | |
3715 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3716 | continue; | |
3717 | break; | |
3718 | case TYPES_DOMAIN: | |
3719 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3720 | continue; | |
3721 | break; | |
3722 | default: | |
3723 | break; | |
3724 | } | |
3725 | } | |
3726 | ||
3190f0c6 DE |
3727 | /* Don't crash on bad data. */ |
3728 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
3729 | + dwarf2_per_objfile->n_type_units)) | |
3730 | { | |
3731 | complaint (&symfile_complaints, | |
3732 | _(".gdb_index entry has bad CU index" | |
4262abfb | 3733 | " [in module %s]"), objfile_name (objfile)); |
3190f0c6 DE |
3734 | continue; |
3735 | } | |
3736 | ||
156942c7 | 3737 | per_cu = dw2_get_cu (cu_index); |
7b08b9eb | 3738 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3739 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3740 | } |
3741 | } | |
3742 | } | |
3743 | ||
9703b513 TT |
3744 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3745 | symtab. */ | |
3746 | ||
3747 | static struct symtab * | |
3748 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3749 | { | |
3750 | int i; | |
3751 | ||
3752 | if (BLOCKVECTOR (symtab) != NULL | |
3753 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3754 | return symtab; | |
3755 | ||
a3ec0bb1 DE |
3756 | if (symtab->includes == NULL) |
3757 | return NULL; | |
3758 | ||
9703b513 TT |
3759 | for (i = 0; symtab->includes[i]; ++i) |
3760 | { | |
a3ec0bb1 | 3761 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
3762 | |
3763 | s = recursively_find_pc_sect_symtab (s, pc); | |
3764 | if (s != NULL) | |
3765 | return s; | |
3766 | } | |
3767 | ||
3768 | return NULL; | |
3769 | } | |
3770 | ||
9291a0cd TT |
3771 | static struct symtab * |
3772 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
3773 | struct minimal_symbol *msymbol, | |
3774 | CORE_ADDR pc, | |
3775 | struct obj_section *section, | |
3776 | int warn_if_readin) | |
3777 | { | |
3778 | struct dwarf2_per_cu_data *data; | |
9703b513 | 3779 | struct symtab *result; |
9291a0cd TT |
3780 | |
3781 | dw2_setup (objfile); | |
3782 | ||
3783 | if (!objfile->psymtabs_addrmap) | |
3784 | return NULL; | |
3785 | ||
3786 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
3787 | if (!data) | |
3788 | return NULL; | |
3789 | ||
3790 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 3791 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
3792 | paddress (get_objfile_arch (objfile), pc)); |
3793 | ||
9703b513 TT |
3794 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
3795 | gdb_assert (result != NULL); | |
3796 | return result; | |
9291a0cd TT |
3797 | } |
3798 | ||
9291a0cd | 3799 | static void |
44b13c5a | 3800 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 3801 | void *data, int need_fullname) |
9291a0cd TT |
3802 | { |
3803 | int i; | |
24c79950 TT |
3804 | struct cleanup *cleanup; |
3805 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
3806 | NULL, xcalloc, xfree); | |
9291a0cd | 3807 | |
24c79950 | 3808 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 3809 | dw2_setup (objfile); |
ae2de4f8 | 3810 | |
848e3e78 DE |
3811 | /* The rule is CUs specify all the files, including those used by |
3812 | any TU, so there's no need to scan TUs here. | |
3813 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 3814 | |
848e3e78 | 3815 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 TT |
3816 | { |
3817 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
3818 | ||
3819 | if (per_cu->v.quick->symtab) | |
3820 | { | |
3821 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
3822 | INSERT); | |
3823 | ||
3824 | *slot = per_cu->v.quick->file_names; | |
3825 | } | |
3826 | } | |
3827 | ||
848e3e78 | 3828 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3829 | { |
3830 | int j; | |
f4dc4d17 | 3831 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3832 | struct quick_file_names *file_data; |
24c79950 | 3833 | void **slot; |
9291a0cd | 3834 | |
3d7bb9d9 | 3835 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3836 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3837 | continue; |
3838 | ||
e4a48d9d | 3839 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3840 | if (file_data == NULL) |
9291a0cd TT |
3841 | continue; |
3842 | ||
24c79950 TT |
3843 | slot = htab_find_slot (visited, file_data, INSERT); |
3844 | if (*slot) | |
3845 | { | |
3846 | /* Already visited. */ | |
3847 | continue; | |
3848 | } | |
3849 | *slot = file_data; | |
3850 | ||
7b9f3c50 | 3851 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3852 | { |
74e2f255 DE |
3853 | const char *this_real_name; |
3854 | ||
3855 | if (need_fullname) | |
3856 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3857 | else | |
3858 | this_real_name = NULL; | |
7b9f3c50 | 3859 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
3860 | } |
3861 | } | |
24c79950 TT |
3862 | |
3863 | do_cleanups (cleanup); | |
9291a0cd TT |
3864 | } |
3865 | ||
3866 | static int | |
3867 | dw2_has_symbols (struct objfile *objfile) | |
3868 | { | |
3869 | return 1; | |
3870 | } | |
3871 | ||
3872 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
3873 | { | |
3874 | dw2_has_symbols, | |
3875 | dw2_find_last_source_symtab, | |
3876 | dw2_forget_cached_source_info, | |
f8eba3c6 | 3877 | dw2_map_symtabs_matching_filename, |
9291a0cd | 3878 | dw2_lookup_symbol, |
9291a0cd TT |
3879 | dw2_print_stats, |
3880 | dw2_dump, | |
3881 | dw2_relocate, | |
3882 | dw2_expand_symtabs_for_function, | |
3883 | dw2_expand_all_symtabs, | |
652a8996 | 3884 | dw2_expand_symtabs_with_fullname, |
40658b94 | 3885 | dw2_map_matching_symbols, |
9291a0cd TT |
3886 | dw2_expand_symtabs_matching, |
3887 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
3888 | dw2_map_symbol_filenames |
3889 | }; | |
3890 | ||
3891 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
3892 | file will use psymtabs, or 1 if using the GNU index. */ | |
3893 | ||
3894 | int | |
3895 | dwarf2_initialize_objfile (struct objfile *objfile) | |
3896 | { | |
3897 | /* If we're about to read full symbols, don't bother with the | |
3898 | indices. In this case we also don't care if some other debug | |
3899 | format is making psymtabs, because they are all about to be | |
3900 | expanded anyway. */ | |
3901 | if ((objfile->flags & OBJF_READNOW)) | |
3902 | { | |
3903 | int i; | |
3904 | ||
3905 | dwarf2_per_objfile->using_index = 1; | |
3906 | create_all_comp_units (objfile); | |
0e50663e | 3907 | create_all_type_units (objfile); |
7b9f3c50 DE |
3908 | dwarf2_per_objfile->quick_file_names_table = |
3909 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 3910 | |
1fd400ff | 3911 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 3912 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3913 | { |
e254ef6a | 3914 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3915 | |
e254ef6a DE |
3916 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3917 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
3918 | } |
3919 | ||
3920 | /* Return 1 so that gdb sees the "quick" functions. However, | |
3921 | these functions will be no-ops because we will have expanded | |
3922 | all symtabs. */ | |
3923 | return 1; | |
3924 | } | |
3925 | ||
3926 | if (dwarf2_read_index (objfile)) | |
3927 | return 1; | |
3928 | ||
9291a0cd TT |
3929 | return 0; |
3930 | } | |
3931 | ||
3932 | \f | |
3933 | ||
dce234bc PP |
3934 | /* Build a partial symbol table. */ |
3935 | ||
3936 | void | |
f29dff0a | 3937 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 3938 | { |
c9bf0622 TT |
3939 | volatile struct gdb_exception except; |
3940 | ||
f29dff0a | 3941 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
3942 | { |
3943 | init_psymbol_list (objfile, 1024); | |
3944 | } | |
3945 | ||
c9bf0622 TT |
3946 | TRY_CATCH (except, RETURN_MASK_ERROR) |
3947 | { | |
3948 | /* This isn't really ideal: all the data we allocate on the | |
3949 | objfile's obstack is still uselessly kept around. However, | |
3950 | freeing it seems unsafe. */ | |
3951 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
3952 | ||
3953 | dwarf2_build_psymtabs_hard (objfile); | |
3954 | discard_cleanups (cleanups); | |
3955 | } | |
3956 | if (except.reason < 0) | |
3957 | exception_print (gdb_stderr, except); | |
c906108c | 3958 | } |
c906108c | 3959 | |
1ce1cefd DE |
3960 | /* Return the total length of the CU described by HEADER. */ |
3961 | ||
3962 | static unsigned int | |
3963 | get_cu_length (const struct comp_unit_head *header) | |
3964 | { | |
3965 | return header->initial_length_size + header->length; | |
3966 | } | |
3967 | ||
45452591 DE |
3968 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
3969 | ||
3970 | static inline int | |
b64f50a1 | 3971 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 3972 | { |
b64f50a1 | 3973 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 3974 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 3975 | |
b64f50a1 | 3976 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
3977 | } |
3978 | ||
3b80fe9b DE |
3979 | /* Find the base address of the compilation unit for range lists and |
3980 | location lists. It will normally be specified by DW_AT_low_pc. | |
3981 | In DWARF-3 draft 4, the base address could be overridden by | |
3982 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
3983 | compilation units with discontinuous ranges. */ | |
3984 | ||
3985 | static void | |
3986 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
3987 | { | |
3988 | struct attribute *attr; | |
3989 | ||
3990 | cu->base_known = 0; | |
3991 | cu->base_address = 0; | |
3992 | ||
3993 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
3994 | if (attr) | |
3995 | { | |
3996 | cu->base_address = DW_ADDR (attr); | |
3997 | cu->base_known = 1; | |
3998 | } | |
3999 | else | |
4000 | { | |
4001 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
4002 | if (attr) | |
4003 | { | |
4004 | cu->base_address = DW_ADDR (attr); | |
4005 | cu->base_known = 1; | |
4006 | } | |
4007 | } | |
4008 | } | |
4009 | ||
93311388 DE |
4010 | /* Read in the comp unit header information from the debug_info at info_ptr. |
4011 | NOTE: This leaves members offset, first_die_offset to be filled in | |
4012 | by the caller. */ | |
107d2387 | 4013 | |
d521ce57 | 4014 | static const gdb_byte * |
107d2387 | 4015 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 4016 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
4017 | { |
4018 | int signed_addr; | |
891d2f0b | 4019 | unsigned int bytes_read; |
c764a876 DE |
4020 | |
4021 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
4022 | cu_header->initial_length_size = bytes_read; | |
4023 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 4024 | info_ptr += bytes_read; |
107d2387 AC |
4025 | cu_header->version = read_2_bytes (abfd, info_ptr); |
4026 | info_ptr += 2; | |
b64f50a1 JK |
4027 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
4028 | &bytes_read); | |
613e1657 | 4029 | info_ptr += bytes_read; |
107d2387 AC |
4030 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
4031 | info_ptr += 1; | |
4032 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
4033 | if (signed_addr < 0) | |
8e65ff28 | 4034 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 4035 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 4036 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 4037 | |
107d2387 AC |
4038 | return info_ptr; |
4039 | } | |
4040 | ||
36586728 TT |
4041 | /* Helper function that returns the proper abbrev section for |
4042 | THIS_CU. */ | |
4043 | ||
4044 | static struct dwarf2_section_info * | |
4045 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
4046 | { | |
4047 | struct dwarf2_section_info *abbrev; | |
4048 | ||
4049 | if (this_cu->is_dwz) | |
4050 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
4051 | else | |
4052 | abbrev = &dwarf2_per_objfile->abbrev; | |
4053 | ||
4054 | return abbrev; | |
4055 | } | |
4056 | ||
9ff913ba DE |
4057 | /* Subroutine of read_and_check_comp_unit_head and |
4058 | read_and_check_type_unit_head to simplify them. | |
4059 | Perform various error checking on the header. */ | |
4060 | ||
4061 | static void | |
4062 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
4063 | struct dwarf2_section_info *section, |
4064 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 4065 | { |
a32a8923 DE |
4066 | bfd *abfd = get_section_bfd_owner (section); |
4067 | const char *filename = get_section_file_name (section); | |
9ff913ba DE |
4068 | |
4069 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
4070 | error (_("Dwarf Error: wrong version in compilation unit header " | |
4071 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
4072 | filename); | |
4073 | ||
b64f50a1 | 4074 | if (header->abbrev_offset.sect_off |
36586728 | 4075 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
4076 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
4077 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 4078 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
4079 | filename); |
4080 | ||
4081 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
4082 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 4083 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
4084 | > section->size) |
4085 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
4086 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 4087 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
4088 | filename); |
4089 | } | |
4090 | ||
4091 | /* Read in a CU/TU header and perform some basic error checking. | |
4092 | The contents of the header are stored in HEADER. | |
4093 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4094 | |
d521ce57 | 4095 | static const gdb_byte * |
9ff913ba DE |
4096 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4097 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4098 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4099 | const gdb_byte *info_ptr, |
9ff913ba | 4100 | int is_debug_types_section) |
72bf9492 | 4101 | { |
d521ce57 | 4102 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4103 | bfd *abfd = get_section_bfd_owner (section); |
72bf9492 | 4104 | |
b64f50a1 | 4105 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4106 | |
72bf9492 DJ |
4107 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4108 | ||
460c1c54 CC |
4109 | /* If we're reading a type unit, skip over the signature and |
4110 | type_offset fields. */ | |
b0df02fd | 4111 | if (is_debug_types_section) |
460c1c54 CC |
4112 | info_ptr += 8 /*signature*/ + header->offset_size; |
4113 | ||
b64f50a1 | 4114 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4115 | |
4bdcc0c1 | 4116 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4117 | |
4118 | return info_ptr; | |
4119 | } | |
4120 | ||
348e048f DE |
4121 | /* Read in the types comp unit header information from .debug_types entry at |
4122 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4123 | ||
d521ce57 | 4124 | static const gdb_byte * |
9ff913ba DE |
4125 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4126 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4127 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4128 | const gdb_byte *info_ptr, |
dee91e82 DE |
4129 | ULONGEST *signature, |
4130 | cu_offset *type_offset_in_tu) | |
348e048f | 4131 | { |
d521ce57 | 4132 | const gdb_byte *beg_of_comp_unit = info_ptr; |
a32a8923 | 4133 | bfd *abfd = get_section_bfd_owner (section); |
348e048f | 4134 | |
b64f50a1 | 4135 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4136 | |
9ff913ba | 4137 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4138 | |
9ff913ba DE |
4139 | /* If we're reading a type unit, skip over the signature and |
4140 | type_offset fields. */ | |
4141 | if (signature != NULL) | |
4142 | *signature = read_8_bytes (abfd, info_ptr); | |
4143 | info_ptr += 8; | |
dee91e82 DE |
4144 | if (type_offset_in_tu != NULL) |
4145 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4146 | header->offset_size); | |
9ff913ba DE |
4147 | info_ptr += header->offset_size; |
4148 | ||
b64f50a1 | 4149 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4150 | |
4bdcc0c1 | 4151 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4152 | |
4153 | return info_ptr; | |
348e048f DE |
4154 | } |
4155 | ||
f4dc4d17 DE |
4156 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4157 | ||
4158 | static sect_offset | |
4159 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4160 | sect_offset offset) | |
4161 | { | |
a32a8923 | 4162 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 4163 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4164 | unsigned int length, initial_length_size, offset_size; |
4165 | sect_offset abbrev_offset; | |
4166 | ||
4167 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4168 | info_ptr = section->buffer + offset.sect_off; | |
4169 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4170 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4171 | info_ptr += initial_length_size + 2 /*version*/; | |
4172 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4173 | return abbrev_offset; | |
4174 | } | |
4175 | ||
aaa75496 JB |
4176 | /* Allocate a new partial symtab for file named NAME and mark this new |
4177 | partial symtab as being an include of PST. */ | |
4178 | ||
4179 | static void | |
d521ce57 | 4180 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4181 | struct objfile *objfile) |
4182 | { | |
4183 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4184 | ||
fbd9ab74 JK |
4185 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4186 | { | |
4187 | /* It shares objfile->objfile_obstack. */ | |
4188 | subpst->dirname = pst->dirname; | |
4189 | } | |
4190 | ||
aaa75496 JB |
4191 | subpst->section_offsets = pst->section_offsets; |
4192 | subpst->textlow = 0; | |
4193 | subpst->texthigh = 0; | |
4194 | ||
4195 | subpst->dependencies = (struct partial_symtab **) | |
4196 | obstack_alloc (&objfile->objfile_obstack, | |
4197 | sizeof (struct partial_symtab *)); | |
4198 | subpst->dependencies[0] = pst; | |
4199 | subpst->number_of_dependencies = 1; | |
4200 | ||
4201 | subpst->globals_offset = 0; | |
4202 | subpst->n_global_syms = 0; | |
4203 | subpst->statics_offset = 0; | |
4204 | subpst->n_static_syms = 0; | |
4205 | subpst->symtab = NULL; | |
4206 | subpst->read_symtab = pst->read_symtab; | |
4207 | subpst->readin = 0; | |
4208 | ||
4209 | /* No private part is necessary for include psymtabs. This property | |
4210 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4211 | the regular ones. */ |
58a9656e | 4212 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4213 | } |
4214 | ||
4215 | /* Read the Line Number Program data and extract the list of files | |
4216 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4217 | partial symtab for each of these included files. */ |
aaa75496 JB |
4218 | |
4219 | static void | |
4220 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4221 | struct die_info *die, |
4222 | struct partial_symtab *pst) | |
aaa75496 | 4223 | { |
d85a05f0 DJ |
4224 | struct line_header *lh = NULL; |
4225 | struct attribute *attr; | |
aaa75496 | 4226 | |
d85a05f0 DJ |
4227 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4228 | if (attr) | |
3019eac3 | 4229 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4230 | if (lh == NULL) |
4231 | return; /* No linetable, so no includes. */ | |
4232 | ||
c6da4cef | 4233 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
f3f5162e | 4234 | dwarf_decode_lines (lh, pst->dirname, cu, pst, 1); |
aaa75496 JB |
4235 | |
4236 | free_line_header (lh); | |
4237 | } | |
4238 | ||
348e048f | 4239 | static hashval_t |
52dc124a | 4240 | hash_signatured_type (const void *item) |
348e048f | 4241 | { |
52dc124a | 4242 | const struct signatured_type *sig_type = item; |
9a619af0 | 4243 | |
348e048f | 4244 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4245 | return sig_type->signature; |
348e048f DE |
4246 | } |
4247 | ||
4248 | static int | |
52dc124a | 4249 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4250 | { |
4251 | const struct signatured_type *lhs = item_lhs; | |
4252 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4253 | |
348e048f DE |
4254 | return lhs->signature == rhs->signature; |
4255 | } | |
4256 | ||
1fd400ff TT |
4257 | /* Allocate a hash table for signatured types. */ |
4258 | ||
4259 | static htab_t | |
673bfd45 | 4260 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4261 | { |
4262 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4263 | hash_signatured_type, |
4264 | eq_signatured_type, | |
1fd400ff TT |
4265 | NULL, |
4266 | &objfile->objfile_obstack, | |
4267 | hashtab_obstack_allocate, | |
4268 | dummy_obstack_deallocate); | |
4269 | } | |
4270 | ||
d467dd73 | 4271 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4272 | |
4273 | static int | |
d467dd73 | 4274 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4275 | { |
4276 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4277 | struct signatured_type ***datap = datum; |
1fd400ff | 4278 | |
b4dd5633 | 4279 | **datap = sigt; |
1fd400ff TT |
4280 | ++*datap; |
4281 | ||
4282 | return 1; | |
4283 | } | |
4284 | ||
c88ee1f0 DE |
4285 | /* Create the hash table of all entries in the .debug_types |
4286 | (or .debug_types.dwo) section(s). | |
4287 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4288 | otherwise it is NULL. | |
4289 | ||
4290 | The result is a pointer to the hash table or NULL if there are no types. | |
4291 | ||
4292 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4293 | |
3019eac3 DE |
4294 | static htab_t |
4295 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4296 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4297 | { |
3019eac3 | 4298 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4299 | htab_t types_htab = NULL; |
8b70b953 TT |
4300 | int ix; |
4301 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4302 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4303 | |
3019eac3 DE |
4304 | if (VEC_empty (dwarf2_section_info_def, types)) |
4305 | return NULL; | |
348e048f | 4306 | |
4bdcc0c1 DE |
4307 | abbrev_section = (dwo_file != NULL |
4308 | ? &dwo_file->sections.abbrev | |
4309 | : &dwarf2_per_objfile->abbrev); | |
4310 | ||
09406207 DE |
4311 | if (dwarf2_read_debug) |
4312 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4313 | dwo_file ? ".dwo" : "", | |
a32a8923 | 4314 | get_section_file_name (abbrev_section)); |
09406207 | 4315 | |
8b70b953 | 4316 | for (ix = 0; |
3019eac3 | 4317 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4318 | ++ix) |
4319 | { | |
3019eac3 | 4320 | bfd *abfd; |
d521ce57 | 4321 | const gdb_byte *info_ptr, *end_ptr; |
348e048f | 4322 | |
8b70b953 TT |
4323 | dwarf2_read_section (objfile, section); |
4324 | info_ptr = section->buffer; | |
348e048f | 4325 | |
8b70b953 TT |
4326 | if (info_ptr == NULL) |
4327 | continue; | |
348e048f | 4328 | |
3019eac3 | 4329 | /* We can't set abfd until now because the section may be empty or |
a32a8923 DE |
4330 | not present, in which case the bfd is unknown. */ |
4331 | abfd = get_section_bfd_owner (section); | |
3019eac3 | 4332 | |
dee91e82 DE |
4333 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4334 | because we don't need to read any dies: the signature is in the | |
4335 | header. */ | |
8b70b953 TT |
4336 | |
4337 | end_ptr = info_ptr + section->size; | |
4338 | while (info_ptr < end_ptr) | |
4339 | { | |
b64f50a1 | 4340 | sect_offset offset; |
3019eac3 | 4341 | cu_offset type_offset_in_tu; |
8b70b953 | 4342 | ULONGEST signature; |
52dc124a | 4343 | struct signatured_type *sig_type; |
3019eac3 | 4344 | struct dwo_unit *dwo_tu; |
8b70b953 | 4345 | void **slot; |
d521ce57 | 4346 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4347 | struct comp_unit_head header; |
dee91e82 | 4348 | unsigned int length; |
348e048f | 4349 | |
b64f50a1 | 4350 | offset.sect_off = ptr - section->buffer; |
348e048f | 4351 | |
8b70b953 | 4352 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4353 | table, but we don't need anything else just yet. */ |
348e048f | 4354 | |
4bdcc0c1 DE |
4355 | ptr = read_and_check_type_unit_head (&header, section, |
4356 | abbrev_section, ptr, | |
3019eac3 | 4357 | &signature, &type_offset_in_tu); |
6caca83c | 4358 | |
1ce1cefd | 4359 | length = get_cu_length (&header); |
dee91e82 | 4360 | |
6caca83c | 4361 | /* Skip dummy type units. */ |
dee91e82 DE |
4362 | if (ptr >= info_ptr + length |
4363 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4364 | { |
1ce1cefd | 4365 | info_ptr += length; |
6caca83c CC |
4366 | continue; |
4367 | } | |
8b70b953 | 4368 | |
0349ea22 DE |
4369 | if (types_htab == NULL) |
4370 | { | |
4371 | if (dwo_file) | |
4372 | types_htab = allocate_dwo_unit_table (objfile); | |
4373 | else | |
4374 | types_htab = allocate_signatured_type_table (objfile); | |
4375 | } | |
4376 | ||
3019eac3 DE |
4377 | if (dwo_file) |
4378 | { | |
4379 | sig_type = NULL; | |
4380 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4381 | struct dwo_unit); | |
4382 | dwo_tu->dwo_file = dwo_file; | |
4383 | dwo_tu->signature = signature; | |
4384 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4385 | dwo_tu->section = section; |
3019eac3 DE |
4386 | dwo_tu->offset = offset; |
4387 | dwo_tu->length = length; | |
4388 | } | |
4389 | else | |
4390 | { | |
4391 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4392 | The real type_offset is in the DWO file. */ | |
4393 | dwo_tu = NULL; | |
4394 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4395 | struct signatured_type); | |
4396 | sig_type->signature = signature; | |
4397 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4398 | sig_type->per_cu.objfile = objfile; | |
4399 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4400 | sig_type->per_cu.section = section; |
3019eac3 DE |
4401 | sig_type->per_cu.offset = offset; |
4402 | sig_type->per_cu.length = length; | |
4403 | } | |
8b70b953 | 4404 | |
3019eac3 DE |
4405 | slot = htab_find_slot (types_htab, |
4406 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4407 | INSERT); | |
8b70b953 TT |
4408 | gdb_assert (slot != NULL); |
4409 | if (*slot != NULL) | |
4410 | { | |
3019eac3 DE |
4411 | sect_offset dup_offset; |
4412 | ||
4413 | if (dwo_file) | |
4414 | { | |
4415 | const struct dwo_unit *dup_tu = *slot; | |
4416 | ||
4417 | dup_offset = dup_tu->offset; | |
4418 | } | |
4419 | else | |
4420 | { | |
4421 | const struct signatured_type *dup_tu = *slot; | |
4422 | ||
4423 | dup_offset = dup_tu->per_cu.offset; | |
4424 | } | |
b3c8eb43 | 4425 | |
8b70b953 | 4426 | complaint (&symfile_complaints, |
c88ee1f0 | 4427 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4428 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4429 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4430 | hex_string (signature)); |
8b70b953 | 4431 | } |
3019eac3 | 4432 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4433 | |
09406207 | 4434 | if (dwarf2_read_debug) |
4031ecc5 | 4435 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4436 | offset.sect_off, |
4031ecc5 | 4437 | hex_string (signature)); |
348e048f | 4438 | |
dee91e82 | 4439 | info_ptr += length; |
8b70b953 | 4440 | } |
348e048f DE |
4441 | } |
4442 | ||
3019eac3 DE |
4443 | return types_htab; |
4444 | } | |
4445 | ||
4446 | /* Create the hash table of all entries in the .debug_types section, | |
4447 | and initialize all_type_units. | |
4448 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4449 | otherwise non-zero. */ | |
4450 | ||
4451 | static int | |
4452 | create_all_type_units (struct objfile *objfile) | |
4453 | { | |
4454 | htab_t types_htab; | |
b4dd5633 | 4455 | struct signatured_type **iter; |
3019eac3 DE |
4456 | |
4457 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4458 | if (types_htab == NULL) | |
4459 | { | |
4460 | dwarf2_per_objfile->signatured_types = NULL; | |
4461 | return 0; | |
4462 | } | |
4463 | ||
348e048f DE |
4464 | dwarf2_per_objfile->signatured_types = types_htab; |
4465 | ||
d467dd73 DE |
4466 | dwarf2_per_objfile->n_type_units = htab_elements (types_htab); |
4467 | dwarf2_per_objfile->all_type_units | |
a2ce51a0 DE |
4468 | = xmalloc (dwarf2_per_objfile->n_type_units |
4469 | * sizeof (struct signatured_type *)); | |
d467dd73 DE |
4470 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4471 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4472 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4473 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4474 | |
348e048f DE |
4475 | return 1; |
4476 | } | |
4477 | ||
a2ce51a0 DE |
4478 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
4479 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
4480 | ||
4481 | static void | |
4482 | fill_in_sig_entry_from_dwo_entry (struct objfile *objfile, | |
4483 | struct signatured_type *sig_entry, | |
4484 | struct dwo_unit *dwo_entry) | |
4485 | { | |
7ee85ab1 | 4486 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
4487 | gdb_assert (! sig_entry->per_cu.queued); |
4488 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
4489 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
4490 | gdb_assert (sig_entry->per_cu.v.quick->symtab == NULL); | |
4491 | gdb_assert (sig_entry->signature == dwo_entry->signature); | |
4492 | gdb_assert (sig_entry->type_offset_in_section.sect_off == 0); | |
4493 | gdb_assert (sig_entry->type_unit_group == NULL); | |
7ee85ab1 DE |
4494 | gdb_assert (sig_entry->dwo_unit == NULL); |
4495 | ||
4496 | sig_entry->per_cu.section = dwo_entry->section; | |
4497 | sig_entry->per_cu.offset = dwo_entry->offset; | |
4498 | sig_entry->per_cu.length = dwo_entry->length; | |
4499 | sig_entry->per_cu.reading_dwo_directly = 1; | |
4500 | sig_entry->per_cu.objfile = objfile; | |
a2ce51a0 DE |
4501 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
4502 | sig_entry->dwo_unit = dwo_entry; | |
4503 | } | |
4504 | ||
4505 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
4506 | If we haven't read the TU yet, create the signatured_type data structure |
4507 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
4508 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
4509 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
4510 | containing that CU. Otherwise we could end up reading several other DWO | |
4511 | files (due to comdat folding) to process the transitive closure of all the | |
4512 | mentioned TUs, and that can be slow. The current DWO file will have every | |
4513 | type signature that it needs. | |
a2ce51a0 DE |
4514 | We only do this for .gdb_index because in the psymtab case we already have |
4515 | to read all the DWOs to build the type unit groups. */ | |
4516 | ||
4517 | static struct signatured_type * | |
4518 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4519 | { | |
4520 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4521 | struct dwo_file *dwo_file; | |
4522 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
4523 | struct signatured_type find_sig_entry, *sig_entry; | |
4524 | ||
4525 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4526 | ||
4527 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the | |
4528 | dwo_unit of the TU itself. */ | |
4529 | dwo_file = cu->dwo_unit->dwo_file; | |
4530 | ||
4531 | /* We only ever need to read in one copy of a signatured type. | |
4532 | Just use the global signatured_types array. If this is the first time | |
4533 | we're reading this type, replace the recorded data from .gdb_index with | |
4534 | this TU. */ | |
4535 | ||
4536 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4537 | return NULL; | |
4538 | find_sig_entry.signature = sig; | |
4539 | sig_entry = htab_find (dwarf2_per_objfile->signatured_types, &find_sig_entry); | |
4540 | if (sig_entry == NULL) | |
4541 | return NULL; | |
7ee85ab1 DE |
4542 | |
4543 | /* We can get here with the TU already read, *or* in the process of being | |
4544 | read. Don't reassign it if that's the case. Also note that if the TU is | |
4545 | already being read, it may not have come from a DWO, the program may be | |
4546 | a mix of Fission-compiled code and non-Fission-compiled code. */ | |
a2ce51a0 | 4547 | /* Have we already tried to read this TU? */ |
7ee85ab1 | 4548 | if (sig_entry->per_cu.tu_read) |
a2ce51a0 DE |
4549 | return sig_entry; |
4550 | ||
4551 | /* Ok, this is the first time we're reading this TU. */ | |
4552 | if (dwo_file->tus == NULL) | |
4553 | return NULL; | |
4554 | find_dwo_entry.signature = sig; | |
4555 | dwo_entry = htab_find (dwo_file->tus, &find_dwo_entry); | |
4556 | if (dwo_entry == NULL) | |
4557 | return NULL; | |
4558 | ||
4559 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); | |
89e63ee4 | 4560 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
4561 | return sig_entry; |
4562 | } | |
4563 | ||
4564 | /* Subroutine of lookup_dwp_signatured_type. | |
4565 | Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. */ | |
4566 | ||
4567 | static struct signatured_type * | |
4568 | add_type_unit (ULONGEST sig) | |
4569 | { | |
4570 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4571 | int n_type_units = dwarf2_per_objfile->n_type_units; | |
4572 | struct signatured_type *sig_type; | |
4573 | void **slot; | |
4574 | ||
4575 | ++n_type_units; | |
4576 | dwarf2_per_objfile->all_type_units = | |
4577 | xrealloc (dwarf2_per_objfile->all_type_units, | |
4578 | n_type_units * sizeof (struct signatured_type *)); | |
4579 | dwarf2_per_objfile->n_type_units = n_type_units; | |
4580 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4581 | struct signatured_type); | |
4582 | dwarf2_per_objfile->all_type_units[n_type_units - 1] = sig_type; | |
4583 | sig_type->signature = sig; | |
4584 | sig_type->per_cu.is_debug_types = 1; | |
4585 | sig_type->per_cu.v.quick = | |
4586 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4587 | struct dwarf2_per_cu_quick_data); | |
4588 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
4589 | sig_type, INSERT); | |
4590 | gdb_assert (*slot == NULL); | |
4591 | *slot = sig_type; | |
4592 | /* The rest of sig_type must be filled in by the caller. */ | |
4593 | return sig_type; | |
4594 | } | |
4595 | ||
4596 | /* Subroutine of lookup_signatured_type. | |
4597 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
4598 | then try the DWP file. | |
4599 | Normally this "can't happen", but if there's a bug in signature | |
4600 | generation and/or the DWP file is built incorrectly, it can happen. | |
4601 | Using the type directly from the DWP file means we don't have the stub | |
4602 | which has some useful attributes (e.g., DW_AT_comp_dir), but they're | |
4603 | not critical. [Eventually the stub may go away for type units anyway.] */ | |
4604 | ||
4605 | static struct signatured_type * | |
4606 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
4607 | { | |
4608 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4609 | struct dwp_file *dwp_file = get_dwp_file (); | |
4610 | struct dwo_unit *dwo_entry; | |
4611 | struct signatured_type find_sig_entry, *sig_entry; | |
4612 | ||
4613 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
4614 | gdb_assert (dwp_file != NULL); | |
4615 | ||
4616 | if (dwarf2_per_objfile->signatured_types != NULL) | |
4617 | { | |
4618 | find_sig_entry.signature = sig; | |
4619 | sig_entry = htab_find (dwarf2_per_objfile->signatured_types, | |
4620 | &find_sig_entry); | |
4621 | if (sig_entry != NULL) | |
4622 | return sig_entry; | |
4623 | } | |
4624 | ||
4625 | /* This is the "shouldn't happen" case. | |
4626 | Try the DWP file and hope for the best. */ | |
4627 | if (dwp_file->tus == NULL) | |
4628 | return NULL; | |
57d63ce2 DE |
4629 | dwo_entry = lookup_dwo_unit_in_dwp (dwp_file, NULL, |
4630 | sig, 1 /* is_debug_types */); | |
a2ce51a0 DE |
4631 | if (dwo_entry == NULL) |
4632 | return NULL; | |
4633 | ||
4634 | sig_entry = add_type_unit (sig); | |
4635 | fill_in_sig_entry_from_dwo_entry (objfile, sig_entry, dwo_entry); | |
4636 | ||
4637 | /* The caller will signal a complaint if we return NULL. | |
4638 | Here we don't return NULL but we still want to complain. */ | |
4639 | complaint (&symfile_complaints, | |
4640 | _("Bad type signature %s referenced by %s at 0x%x," | |
4641 | " coping by using copy in DWP [in module %s]"), | |
4642 | hex_string (sig), | |
4643 | cu->per_cu->is_debug_types ? "TU" : "CU", | |
4644 | cu->per_cu->offset.sect_off, | |
4262abfb | 4645 | objfile_name (objfile)); |
a2ce51a0 DE |
4646 | |
4647 | return sig_entry; | |
4648 | } | |
4649 | ||
380bca97 | 4650 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
4651 | Returns NULL if signature SIG is not present in the table. |
4652 | It is up to the caller to complain about this. */ | |
348e048f DE |
4653 | |
4654 | static struct signatured_type * | |
a2ce51a0 | 4655 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 4656 | { |
a2ce51a0 DE |
4657 | if (cu->dwo_unit |
4658 | && dwarf2_per_objfile->using_index) | |
4659 | { | |
4660 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
4661 | These cases require special processing. */ | |
4662 | if (get_dwp_file () == NULL) | |
4663 | return lookup_dwo_signatured_type (cu, sig); | |
4664 | else | |
4665 | return lookup_dwp_signatured_type (cu, sig); | |
4666 | } | |
4667 | else | |
4668 | { | |
4669 | struct signatured_type find_entry, *entry; | |
348e048f | 4670 | |
a2ce51a0 DE |
4671 | if (dwarf2_per_objfile->signatured_types == NULL) |
4672 | return NULL; | |
4673 | find_entry.signature = sig; | |
4674 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4675 | return entry; | |
4676 | } | |
348e048f | 4677 | } |
42e7ad6c DE |
4678 | \f |
4679 | /* Low level DIE reading support. */ | |
348e048f | 4680 | |
d85a05f0 DJ |
4681 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4682 | ||
4683 | static void | |
4684 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4685 | struct dwarf2_cu *cu, |
3019eac3 DE |
4686 | struct dwarf2_section_info *section, |
4687 | struct dwo_file *dwo_file) | |
d85a05f0 | 4688 | { |
fceca515 | 4689 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 4690 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 4691 | reader->cu = cu; |
3019eac3 | 4692 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4693 | reader->die_section = section; |
4694 | reader->buffer = section->buffer; | |
f664829e | 4695 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 4696 | reader->comp_dir = NULL; |
d85a05f0 DJ |
4697 | } |
4698 | ||
b0c7bfa9 DE |
4699 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
4700 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
4701 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
4702 | already. | |
4703 | ||
4704 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
4705 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
4706 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
4707 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
4708 | attribute of the referencing CU. Exactly one of STUB_COMP_UNIT_DIE and | |
4709 | COMP_DIR must be non-NULL. | |
b0c7bfa9 DE |
4710 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
4711 | are filled in with the info of the DIE from the DWO file. | |
4712 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
4713 | provided an abbrev table to use. | |
4714 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
4715 | ||
4716 | static int | |
4717 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
4718 | struct dwo_unit *dwo_unit, | |
4719 | int abbrev_table_provided, | |
4720 | struct die_info *stub_comp_unit_die, | |
a2ce51a0 | 4721 | const char *stub_comp_dir, |
b0c7bfa9 | 4722 | struct die_reader_specs *result_reader, |
d521ce57 | 4723 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
4724 | struct die_info **result_comp_unit_die, |
4725 | int *result_has_children) | |
4726 | { | |
4727 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4728 | struct dwarf2_cu *cu = this_cu->cu; | |
4729 | struct dwarf2_section_info *section; | |
4730 | bfd *abfd; | |
d521ce57 | 4731 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
4732 | const char *comp_dir_string; |
4733 | ULONGEST signature; /* Or dwo_id. */ | |
4734 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
4735 | int i,num_extra_attrs; | |
4736 | struct dwarf2_section_info *dwo_abbrev_section; | |
4737 | struct attribute *attr; | |
a2ce51a0 | 4738 | struct attribute comp_dir_attr; |
b0c7bfa9 DE |
4739 | struct die_info *comp_unit_die; |
4740 | ||
a2ce51a0 DE |
4741 | /* Both can't be provided. */ |
4742 | gdb_assert (! (stub_comp_unit_die && stub_comp_dir)); | |
4743 | ||
b0c7bfa9 DE |
4744 | /* These attributes aren't processed until later: |
4745 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
4746 | However, the attribute is found in the stub which we won't have later. | |
4747 | In order to not impose this complication on the rest of the code, | |
4748 | we read them here and copy them to the DWO CU/TU die. */ | |
4749 | ||
4750 | stmt_list = NULL; | |
4751 | low_pc = NULL; | |
4752 | high_pc = NULL; | |
4753 | ranges = NULL; | |
4754 | comp_dir = NULL; | |
4755 | ||
4756 | if (stub_comp_unit_die != NULL) | |
4757 | { | |
4758 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
4759 | DWO file. */ | |
4760 | if (! this_cu->is_debug_types) | |
4761 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
4762 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
4763 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
4764 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
4765 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
4766 | ||
4767 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
4768 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
4769 | cu->addr_base = 0; | |
4770 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
4771 | if (attr) | |
4772 | cu->addr_base = DW_UNSND (attr); | |
4773 | ||
4774 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
4775 | We need the value before we can process DW_AT_ranges. */ | |
4776 | cu->ranges_base = 0; | |
4777 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
4778 | if (attr) | |
4779 | cu->ranges_base = DW_UNSND (attr); | |
4780 | } | |
a2ce51a0 DE |
4781 | else if (stub_comp_dir != NULL) |
4782 | { | |
4783 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
4784 | comp_dir = (struct attribute *) | |
4785 | obstack_alloc (&cu->comp_unit_obstack, sizeof (*comp_dir)); | |
4786 | comp_dir->name = DW_AT_comp_dir; | |
4787 | comp_dir->form = DW_FORM_string; | |
4788 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
4789 | DW_STRING (comp_dir) = stub_comp_dir; | |
4790 | } | |
b0c7bfa9 DE |
4791 | |
4792 | /* Set up for reading the DWO CU/TU. */ | |
4793 | cu->dwo_unit = dwo_unit; | |
4794 | section = dwo_unit->section; | |
4795 | dwarf2_read_section (objfile, section); | |
a32a8923 | 4796 | abfd = get_section_bfd_owner (section); |
b0c7bfa9 DE |
4797 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
4798 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
4799 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
4800 | ||
4801 | if (this_cu->is_debug_types) | |
4802 | { | |
4803 | ULONGEST header_signature; | |
4804 | cu_offset type_offset_in_tu; | |
4805 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
4806 | ||
4807 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
4808 | dwo_abbrev_section, | |
4809 | info_ptr, | |
4810 | &header_signature, | |
4811 | &type_offset_in_tu); | |
a2ce51a0 DE |
4812 | /* This is not an assert because it can be caused by bad debug info. */ |
4813 | if (sig_type->signature != header_signature) | |
4814 | { | |
4815 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
4816 | " TU at offset 0x%x [in module %s]"), | |
4817 | hex_string (sig_type->signature), | |
4818 | hex_string (header_signature), | |
4819 | dwo_unit->offset.sect_off, | |
4820 | bfd_get_filename (abfd)); | |
4821 | } | |
b0c7bfa9 DE |
4822 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
4823 | /* For DWOs coming from DWP files, we don't know the CU length | |
4824 | nor the type's offset in the TU until now. */ | |
4825 | dwo_unit->length = get_cu_length (&cu->header); | |
4826 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
4827 | ||
4828 | /* Establish the type offset that can be used to lookup the type. | |
4829 | For DWO files, we don't know it until now. */ | |
4830 | sig_type->type_offset_in_section.sect_off = | |
4831 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
4832 | } | |
4833 | else | |
4834 | { | |
4835 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
4836 | dwo_abbrev_section, | |
4837 | info_ptr, 0); | |
4838 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
4839 | /* For DWOs coming from DWP files, we don't know the CU length | |
4840 | until now. */ | |
4841 | dwo_unit->length = get_cu_length (&cu->header); | |
4842 | } | |
4843 | ||
02142a6c DE |
4844 | /* Replace the CU's original abbrev table with the DWO's. |
4845 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
4846 | if (abbrev_table_provided) |
4847 | { | |
4848 | /* Don't free the provided abbrev table, the caller of | |
4849 | init_cutu_and_read_dies owns it. */ | |
4850 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 4851 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
4852 | make_cleanup (dwarf2_free_abbrev_table, cu); |
4853 | } | |
4854 | else | |
4855 | { | |
4856 | dwarf2_free_abbrev_table (cu); | |
4857 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 4858 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
4859 | } |
4860 | ||
4861 | /* Read in the die, but leave space to copy over the attributes | |
4862 | from the stub. This has the benefit of simplifying the rest of | |
4863 | the code - all the work to maintain the illusion of a single | |
4864 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
4865 | num_extra_attrs = ((stmt_list != NULL) | |
4866 | + (low_pc != NULL) | |
4867 | + (high_pc != NULL) | |
4868 | + (ranges != NULL) | |
4869 | + (comp_dir != NULL)); | |
4870 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
4871 | result_has_children, num_extra_attrs); | |
4872 | ||
4873 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
4874 | comp_unit_die = *result_comp_unit_die; | |
4875 | i = comp_unit_die->num_attrs; | |
4876 | if (stmt_list != NULL) | |
4877 | comp_unit_die->attrs[i++] = *stmt_list; | |
4878 | if (low_pc != NULL) | |
4879 | comp_unit_die->attrs[i++] = *low_pc; | |
4880 | if (high_pc != NULL) | |
4881 | comp_unit_die->attrs[i++] = *high_pc; | |
4882 | if (ranges != NULL) | |
4883 | comp_unit_die->attrs[i++] = *ranges; | |
4884 | if (comp_dir != NULL) | |
4885 | comp_unit_die->attrs[i++] = *comp_dir; | |
4886 | comp_unit_die->num_attrs += num_extra_attrs; | |
4887 | ||
bf6af496 DE |
4888 | if (dwarf2_die_debug) |
4889 | { | |
4890 | fprintf_unfiltered (gdb_stdlog, | |
4891 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 4892 | get_section_name (section), |
bf6af496 DE |
4893 | (unsigned) (begin_info_ptr - section->buffer), |
4894 | bfd_get_filename (abfd)); | |
4895 | dump_die (comp_unit_die, dwarf2_die_debug); | |
4896 | } | |
4897 | ||
a2ce51a0 DE |
4898 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
4899 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
4900 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
4901 | to get it via circuitous means. Blech. */ | |
4902 | if (comp_dir != NULL) | |
4903 | result_reader->comp_dir = DW_STRING (comp_dir); | |
4904 | ||
b0c7bfa9 DE |
4905 | /* Skip dummy compilation units. */ |
4906 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
4907 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
4908 | return 0; | |
4909 | ||
4910 | *result_info_ptr = info_ptr; | |
4911 | return 1; | |
4912 | } | |
4913 | ||
4914 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
4915 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 4916 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
4917 | |
4918 | static struct dwo_unit * | |
4919 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
4920 | struct die_info *comp_unit_die) | |
4921 | { | |
4922 | struct dwarf2_cu *cu = this_cu->cu; | |
4923 | struct attribute *attr; | |
4924 | ULONGEST signature; | |
4925 | struct dwo_unit *dwo_unit; | |
4926 | const char *comp_dir, *dwo_name; | |
4927 | ||
a2ce51a0 DE |
4928 | gdb_assert (cu != NULL); |
4929 | ||
b0c7bfa9 DE |
4930 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
4931 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
4932 | gdb_assert (attr != NULL); | |
4933 | dwo_name = DW_STRING (attr); | |
4934 | comp_dir = NULL; | |
4935 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
4936 | if (attr) | |
4937 | comp_dir = DW_STRING (attr); | |
4938 | ||
4939 | if (this_cu->is_debug_types) | |
4940 | { | |
4941 | struct signatured_type *sig_type; | |
4942 | ||
4943 | /* Since this_cu is the first member of struct signatured_type, | |
4944 | we can go from a pointer to one to a pointer to the other. */ | |
4945 | sig_type = (struct signatured_type *) this_cu; | |
4946 | signature = sig_type->signature; | |
4947 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
4948 | } | |
4949 | else | |
4950 | { | |
4951 | struct attribute *attr; | |
4952 | ||
4953 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
4954 | if (! attr) | |
4955 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
4956 | " [in module %s]"), | |
4262abfb | 4957 | dwo_name, objfile_name (this_cu->objfile)); |
b0c7bfa9 DE |
4958 | signature = DW_UNSND (attr); |
4959 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
4960 | signature); | |
4961 | } | |
4962 | ||
b0c7bfa9 DE |
4963 | return dwo_unit; |
4964 | } | |
4965 | ||
a2ce51a0 DE |
4966 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
4967 | Read a TU directly from a DWO file, bypassing the stub. */ | |
4968 | ||
4969 | static void | |
4970 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, int keep, | |
4971 | die_reader_func_ftype *die_reader_func, | |
4972 | void *data) | |
4973 | { | |
4974 | struct dwarf2_cu *cu; | |
4975 | struct signatured_type *sig_type; | |
4976 | struct cleanup *cleanups, *free_cu_cleanup; | |
4977 | struct die_reader_specs reader; | |
4978 | const gdb_byte *info_ptr; | |
4979 | struct die_info *comp_unit_die; | |
4980 | int has_children; | |
4981 | ||
4982 | /* Verify we can do the following downcast, and that we have the | |
4983 | data we need. */ | |
4984 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
4985 | sig_type = (struct signatured_type *) this_cu; | |
4986 | gdb_assert (sig_type->dwo_unit != NULL); | |
4987 | ||
4988 | cleanups = make_cleanup (null_cleanup, NULL); | |
4989 | ||
4990 | gdb_assert (this_cu->cu == NULL); | |
4991 | cu = xmalloc (sizeof (*cu)); | |
4992 | init_one_comp_unit (cu, this_cu); | |
4993 | /* If an error occurs while loading, release our storage. */ | |
4994 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
4995 | ||
4996 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
4997 | 0 /* abbrev_table_provided */, | |
4998 | NULL /* stub_comp_unit_die */, | |
4999 | sig_type->dwo_unit->dwo_file->comp_dir, | |
5000 | &reader, &info_ptr, | |
5001 | &comp_unit_die, &has_children) == 0) | |
5002 | { | |
5003 | /* Dummy die. */ | |
5004 | do_cleanups (cleanups); | |
5005 | return; | |
5006 | } | |
5007 | ||
5008 | /* All the "real" work is done here. */ | |
5009 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5010 | ||
5011 | /* This duplicates some code in init_cutu_and_read_dies, | |
5012 | but the alternative is making the latter more complex. | |
5013 | This function is only for the special case of using DWO files directly: | |
5014 | no point in overly complicating the general case just to handle this. */ | |
5015 | if (keep) | |
5016 | { | |
5017 | /* We've successfully allocated this compilation unit. Let our | |
5018 | caller clean it up when finished with it. */ | |
5019 | discard_cleanups (free_cu_cleanup); | |
5020 | ||
5021 | /* We can only discard free_cu_cleanup and all subsequent cleanups. | |
5022 | So we have to manually free the abbrev table. */ | |
5023 | dwarf2_free_abbrev_table (cu); | |
5024 | ||
5025 | /* Link this CU into read_in_chain. */ | |
5026 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5027 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5028 | } | |
5029 | else | |
5030 | do_cleanups (free_cu_cleanup); | |
5031 | ||
5032 | do_cleanups (cleanups); | |
5033 | } | |
5034 | ||
fd820528 | 5035 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 5036 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 5037 | |
f4dc4d17 DE |
5038 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
5039 | Otherwise the table specified in the comp unit header is read in and used. | |
5040 | This is an optimization for when we already have the abbrev table. | |
5041 | ||
dee91e82 DE |
5042 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
5043 | Otherwise, a new CU is allocated with xmalloc. | |
5044 | ||
5045 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
5046 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
5047 | ||
5048 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 5049 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 5050 | |
70221824 | 5051 | static void |
fd820528 | 5052 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 5053 | struct abbrev_table *abbrev_table, |
fd820528 DE |
5054 | int use_existing_cu, int keep, |
5055 | die_reader_func_ftype *die_reader_func, | |
5056 | void *data) | |
c906108c | 5057 | { |
dee91e82 | 5058 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 5059 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5060 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5061 | struct dwarf2_cu *cu; |
d521ce57 | 5062 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 5063 | struct die_reader_specs reader; |
d85a05f0 | 5064 | struct die_info *comp_unit_die; |
dee91e82 | 5065 | int has_children; |
d85a05f0 | 5066 | struct attribute *attr; |
365156ad | 5067 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
dee91e82 | 5068 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 5069 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
5070 | /* Non-zero if CU currently points to a DWO file and we need to |
5071 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 5072 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 5073 | int rereading_dwo_cu = 0; |
c906108c | 5074 | |
09406207 DE |
5075 | if (dwarf2_die_debug) |
5076 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5077 | this_cu->is_debug_types ? "type" : "comp", | |
5078 | this_cu->offset.sect_off); | |
5079 | ||
dee91e82 DE |
5080 | if (use_existing_cu) |
5081 | gdb_assert (keep); | |
23745b47 | 5082 | |
a2ce51a0 DE |
5083 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
5084 | file (instead of going through the stub), short-circuit all of this. */ | |
5085 | if (this_cu->reading_dwo_directly) | |
5086 | { | |
5087 | /* Narrow down the scope of possibilities to have to understand. */ | |
5088 | gdb_assert (this_cu->is_debug_types); | |
5089 | gdb_assert (abbrev_table == NULL); | |
5090 | gdb_assert (!use_existing_cu); | |
5091 | init_tu_and_read_dwo_dies (this_cu, keep, die_reader_func, data); | |
5092 | return; | |
5093 | } | |
5094 | ||
dee91e82 DE |
5095 | cleanups = make_cleanup (null_cleanup, NULL); |
5096 | ||
5097 | /* This is cheap if the section is already read in. */ | |
5098 | dwarf2_read_section (objfile, section); | |
5099 | ||
5100 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
5101 | |
5102 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
5103 | |
5104 | if (use_existing_cu && this_cu->cu != NULL) | |
5105 | { | |
5106 | cu = this_cu->cu; | |
42e7ad6c DE |
5107 | |
5108 | /* If this CU is from a DWO file we need to start over, we need to | |
5109 | refetch the attributes from the skeleton CU. | |
5110 | This could be optimized by retrieving those attributes from when we | |
5111 | were here the first time: the previous comp_unit_die was stored in | |
5112 | comp_unit_obstack. But there's no data yet that we need this | |
5113 | optimization. */ | |
5114 | if (cu->dwo_unit != NULL) | |
5115 | rereading_dwo_cu = 1; | |
dee91e82 DE |
5116 | } |
5117 | else | |
5118 | { | |
5119 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
5120 | gdb_assert (this_cu->cu == NULL); | |
5121 | ||
5122 | cu = xmalloc (sizeof (*cu)); | |
5123 | init_one_comp_unit (cu, this_cu); | |
5124 | ||
5125 | /* If an error occurs while loading, release our storage. */ | |
365156ad | 5126 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); |
42e7ad6c | 5127 | } |
dee91e82 | 5128 | |
b0c7bfa9 | 5129 | /* Get the header. */ |
42e7ad6c DE |
5130 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
5131 | { | |
5132 | /* We already have the header, there's no need to read it in again. */ | |
5133 | info_ptr += cu->header.first_die_offset.cu_off; | |
5134 | } | |
5135 | else | |
5136 | { | |
3019eac3 | 5137 | if (this_cu->is_debug_types) |
dee91e82 DE |
5138 | { |
5139 | ULONGEST signature; | |
42e7ad6c | 5140 | cu_offset type_offset_in_tu; |
dee91e82 | 5141 | |
4bdcc0c1 DE |
5142 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
5143 | abbrev_section, info_ptr, | |
42e7ad6c DE |
5144 | &signature, |
5145 | &type_offset_in_tu); | |
dee91e82 | 5146 | |
42e7ad6c DE |
5147 | /* Since per_cu is the first member of struct signatured_type, |
5148 | we can go from a pointer to one to a pointer to the other. */ | |
5149 | sig_type = (struct signatured_type *) this_cu; | |
5150 | gdb_assert (sig_type->signature == signature); | |
5151 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
5152 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
5153 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
5154 | ||
42e7ad6c DE |
5155 | /* LENGTH has not been set yet for type units if we're |
5156 | using .gdb_index. */ | |
1ce1cefd | 5157 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
5158 | |
5159 | /* Establish the type offset that can be used to lookup the type. */ | |
5160 | sig_type->type_offset_in_section.sect_off = | |
5161 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
5162 | } |
5163 | else | |
5164 | { | |
4bdcc0c1 DE |
5165 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
5166 | abbrev_section, | |
5167 | info_ptr, 0); | |
dee91e82 DE |
5168 | |
5169 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 5170 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
5171 | } |
5172 | } | |
10b3939b | 5173 | |
6caca83c | 5174 | /* Skip dummy compilation units. */ |
dee91e82 | 5175 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
5176 | || peek_abbrev_code (abfd, info_ptr) == 0) |
5177 | { | |
dee91e82 | 5178 | do_cleanups (cleanups); |
21b2bd31 | 5179 | return; |
6caca83c CC |
5180 | } |
5181 | ||
433df2d4 DE |
5182 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
5183 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
5184 | done. Note that it's important that if the CU had an abbrev table |
5185 | on entry we don't free it when we're done: Somewhere up the call stack | |
5186 | it may be in use. */ | |
f4dc4d17 DE |
5187 | if (abbrev_table != NULL) |
5188 | { | |
5189 | gdb_assert (cu->abbrev_table == NULL); | |
5190 | gdb_assert (cu->header.abbrev_offset.sect_off | |
5191 | == abbrev_table->offset.sect_off); | |
5192 | cu->abbrev_table = abbrev_table; | |
5193 | } | |
5194 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 5195 | { |
4bdcc0c1 | 5196 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
5197 | make_cleanup (dwarf2_free_abbrev_table, cu); |
5198 | } | |
42e7ad6c DE |
5199 | else if (rereading_dwo_cu) |
5200 | { | |
5201 | dwarf2_free_abbrev_table (cu); | |
5202 | dwarf2_read_abbrevs (cu, abbrev_section); | |
5203 | } | |
af703f96 | 5204 | |
dee91e82 | 5205 | /* Read the top level CU/TU die. */ |
3019eac3 | 5206 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 5207 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 5208 | |
b0c7bfa9 DE |
5209 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
5210 | from the DWO file. | |
5211 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
5212 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
5213 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
5214 | if (attr) | |
5215 | { | |
3019eac3 | 5216 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 5217 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
5218 | |
5219 | if (has_children) | |
6a506a2d DE |
5220 | { |
5221 | complaint (&symfile_complaints, | |
5222 | _("compilation unit with DW_AT_GNU_dwo_name" | |
5223 | " has children (offset 0x%x) [in module %s]"), | |
5224 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
5225 | } | |
b0c7bfa9 | 5226 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 5227 | if (dwo_unit != NULL) |
3019eac3 | 5228 | { |
6a506a2d DE |
5229 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
5230 | abbrev_table != NULL, | |
a2ce51a0 | 5231 | comp_unit_die, NULL, |
6a506a2d DE |
5232 | &reader, &info_ptr, |
5233 | &dwo_comp_unit_die, &has_children) == 0) | |
5234 | { | |
5235 | /* Dummy die. */ | |
5236 | do_cleanups (cleanups); | |
5237 | return; | |
5238 | } | |
5239 | comp_unit_die = dwo_comp_unit_die; | |
5240 | } | |
5241 | else | |
5242 | { | |
5243 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
5244 | the stub. A complaint has already been logged. There's | |
5245 | not much more we can do except pass on the stub DIE to | |
5246 | die_reader_func. We don't want to throw an error on bad | |
5247 | debug info. */ | |
3019eac3 DE |
5248 | } |
5249 | } | |
5250 | ||
b0c7bfa9 | 5251 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
5252 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
5253 | ||
b0c7bfa9 | 5254 | /* Done, clean up. */ |
365156ad | 5255 | if (free_cu_cleanup != NULL) |
348e048f | 5256 | { |
365156ad TT |
5257 | if (keep) |
5258 | { | |
5259 | /* We've successfully allocated this compilation unit. Let our | |
5260 | caller clean it up when finished with it. */ | |
5261 | discard_cleanups (free_cu_cleanup); | |
dee91e82 | 5262 | |
365156ad TT |
5263 | /* We can only discard free_cu_cleanup and all subsequent cleanups. |
5264 | So we have to manually free the abbrev table. */ | |
5265 | dwarf2_free_abbrev_table (cu); | |
dee91e82 | 5266 | |
365156ad TT |
5267 | /* Link this CU into read_in_chain. */ |
5268 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
5269 | dwarf2_per_objfile->read_in_chain = this_cu; | |
5270 | } | |
5271 | else | |
5272 | do_cleanups (free_cu_cleanup); | |
348e048f | 5273 | } |
365156ad TT |
5274 | |
5275 | do_cleanups (cleanups); | |
dee91e82 DE |
5276 | } |
5277 | ||
3019eac3 DE |
5278 | /* Read CU/TU THIS_CU in section SECTION, |
5279 | but do not follow DW_AT_GNU_dwo_name if present. | |
80626a55 DE |
5280 | DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed |
5281 | to have already done the lookup to find the DWO/DWP file). | |
dee91e82 DE |
5282 | |
5283 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 5284 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
5285 | |
5286 | We fill in THIS_CU->length. | |
5287 | ||
5288 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
5289 | linker) then DIE_READER_FUNC will not get called. | |
5290 | ||
5291 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5292 | This is done in order to not leave THIS_CU->cu in a state where we have |
5293 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
5294 | |
5295 | static void | |
5296 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
5297 | struct dwarf2_section_info *abbrev_section, | |
3019eac3 | 5298 | struct dwo_file *dwo_file, |
dee91e82 DE |
5299 | die_reader_func_ftype *die_reader_func, |
5300 | void *data) | |
5301 | { | |
5302 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 5303 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 5304 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 5305 | struct dwarf2_cu cu; |
d521ce57 | 5306 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
5307 | struct die_reader_specs reader; |
5308 | struct cleanup *cleanups; | |
5309 | struct die_info *comp_unit_die; | |
5310 | int has_children; | |
5311 | ||
09406207 DE |
5312 | if (dwarf2_die_debug) |
5313 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
5314 | this_cu->is_debug_types ? "type" : "comp", | |
5315 | this_cu->offset.sect_off); | |
5316 | ||
dee91e82 DE |
5317 | gdb_assert (this_cu->cu == NULL); |
5318 | ||
dee91e82 DE |
5319 | /* This is cheap if the section is already read in. */ |
5320 | dwarf2_read_section (objfile, section); | |
5321 | ||
5322 | init_one_comp_unit (&cu, this_cu); | |
5323 | ||
5324 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
5325 | ||
5326 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
5327 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
5328 | abbrev_section, info_ptr, | |
3019eac3 | 5329 | this_cu->is_debug_types); |
dee91e82 | 5330 | |
1ce1cefd | 5331 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
5332 | |
5333 | /* Skip dummy compilation units. */ | |
5334 | if (info_ptr >= begin_info_ptr + this_cu->length | |
5335 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 5336 | { |
dee91e82 | 5337 | do_cleanups (cleanups); |
21b2bd31 | 5338 | return; |
93311388 | 5339 | } |
72bf9492 | 5340 | |
dee91e82 DE |
5341 | dwarf2_read_abbrevs (&cu, abbrev_section); |
5342 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
5343 | ||
3019eac3 | 5344 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
5345 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
5346 | ||
5347 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
5348 | ||
5349 | do_cleanups (cleanups); | |
5350 | } | |
5351 | ||
3019eac3 DE |
5352 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
5353 | does not lookup the specified DWO file. | |
5354 | This cannot be used to read DWO files. | |
dee91e82 DE |
5355 | |
5356 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
5357 | This is done in order to not leave THIS_CU->cu in a state where we have |
5358 | to care whether it refers to the "main" CU or the DWO CU. | |
5359 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
5360 | |
5361 | static void | |
5362 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
5363 | die_reader_func_ftype *die_reader_func, | |
5364 | void *data) | |
5365 | { | |
5366 | init_cutu_and_read_dies_no_follow (this_cu, | |
36586728 | 5367 | get_abbrev_section_for_cu (this_cu), |
3019eac3 | 5368 | NULL, |
dee91e82 DE |
5369 | die_reader_func, data); |
5370 | } | |
0018ea6f DE |
5371 | \f |
5372 | /* Type Unit Groups. | |
dee91e82 | 5373 | |
0018ea6f DE |
5374 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
5375 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
5376 | so that all types coming from the same compilation (.o file) are grouped | |
5377 | together. A future step could be to put the types in the same symtab as | |
5378 | the CU the types ultimately came from. */ | |
ff013f42 | 5379 | |
f4dc4d17 DE |
5380 | static hashval_t |
5381 | hash_type_unit_group (const void *item) | |
5382 | { | |
094b34ac | 5383 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 5384 | |
094b34ac | 5385 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 5386 | } |
348e048f DE |
5387 | |
5388 | static int | |
f4dc4d17 | 5389 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 5390 | { |
f4dc4d17 DE |
5391 | const struct type_unit_group *lhs = item_lhs; |
5392 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 5393 | |
094b34ac | 5394 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5395 | } |
348e048f | 5396 | |
f4dc4d17 DE |
5397 | /* Allocate a hash table for type unit groups. */ |
5398 | ||
5399 | static htab_t | |
5400 | allocate_type_unit_groups_table (void) | |
5401 | { | |
5402 | return htab_create_alloc_ex (3, | |
5403 | hash_type_unit_group, | |
5404 | eq_type_unit_group, | |
5405 | NULL, | |
5406 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5407 | hashtab_obstack_allocate, | |
5408 | dummy_obstack_deallocate); | |
5409 | } | |
dee91e82 | 5410 | |
f4dc4d17 DE |
5411 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5412 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5413 | of any one psymtab grow too big. */ | |
5414 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5415 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5416 | |
094b34ac | 5417 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5418 | Create the type_unit_group object used to hold one or more TUs. */ |
5419 | ||
5420 | static struct type_unit_group * | |
094b34ac | 5421 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5422 | { |
5423 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5424 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5425 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5426 | |
5427 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5428 | struct type_unit_group); | |
094b34ac | 5429 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5430 | per_cu->objfile = objfile; |
f4dc4d17 | 5431 | |
094b34ac DE |
5432 | if (dwarf2_per_objfile->using_index) |
5433 | { | |
5434 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5435 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5436 | } |
5437 | else | |
5438 | { | |
5439 | unsigned int line_offset = line_offset_struct.sect_off; | |
5440 | struct partial_symtab *pst; | |
5441 | char *name; | |
5442 | ||
5443 | /* Give the symtab a useful name for debug purposes. */ | |
5444 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5445 | name = xstrprintf ("<type_units_%d>", | |
5446 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5447 | else | |
5448 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5449 | ||
5450 | pst = create_partial_symtab (per_cu, name); | |
5451 | pst->anonymous = 1; | |
f4dc4d17 | 5452 | |
094b34ac DE |
5453 | xfree (name); |
5454 | } | |
f4dc4d17 | 5455 | |
094b34ac DE |
5456 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5457 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5458 | |
5459 | return tu_group; | |
5460 | } | |
5461 | ||
094b34ac DE |
5462 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5463 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5464 | |
5465 | static struct type_unit_group * | |
ff39bb5e | 5466 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 DE |
5467 | { |
5468 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5469 | struct type_unit_group *tu_group; | |
5470 | void **slot; | |
5471 | unsigned int line_offset; | |
5472 | struct type_unit_group type_unit_group_for_lookup; | |
5473 | ||
5474 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5475 | { | |
5476 | dwarf2_per_objfile->type_unit_groups = | |
5477 | allocate_type_unit_groups_table (); | |
5478 | } | |
5479 | ||
5480 | /* Do we need to create a new group, or can we use an existing one? */ | |
5481 | ||
5482 | if (stmt_list) | |
5483 | { | |
5484 | line_offset = DW_UNSND (stmt_list); | |
5485 | ++tu_stats->nr_symtab_sharers; | |
5486 | } | |
5487 | else | |
5488 | { | |
5489 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5490 | We can do various things here like create one group per TU or | |
5491 | spread them over multiple groups to split up the expansion work. | |
5492 | To avoid worst case scenarios (too many groups or too large groups) | |
5493 | we, umm, group them in bunches. */ | |
5494 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5495 | | (tu_stats->nr_stmt_less_type_units | |
5496 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5497 | ++tu_stats->nr_stmt_less_type_units; | |
5498 | } | |
5499 | ||
094b34ac DE |
5500 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5501 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5502 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5503 | &type_unit_group_for_lookup, INSERT); | |
5504 | if (*slot != NULL) | |
5505 | { | |
5506 | tu_group = *slot; | |
5507 | gdb_assert (tu_group != NULL); | |
5508 | } | |
5509 | else | |
5510 | { | |
5511 | sect_offset line_offset_struct; | |
5512 | ||
5513 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5514 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5515 | *slot = tu_group; |
5516 | ++tu_stats->nr_symtabs; | |
5517 | } | |
5518 | ||
5519 | return tu_group; | |
5520 | } | |
5521 | ||
5522 | /* Struct used to sort TUs by their abbreviation table offset. */ | |
5523 | ||
5524 | struct tu_abbrev_offset | |
5525 | { | |
5526 | struct signatured_type *sig_type; | |
5527 | sect_offset abbrev_offset; | |
5528 | }; | |
5529 | ||
5530 | /* Helper routine for build_type_unit_groups, passed to qsort. */ | |
5531 | ||
5532 | static int | |
5533 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
5534 | { | |
5535 | const struct tu_abbrev_offset * const *a = ap; | |
5536 | const struct tu_abbrev_offset * const *b = bp; | |
5537 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
5538 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
5539 | ||
5540 | return (aoff > boff) - (aoff < boff); | |
5541 | } | |
5542 | ||
5543 | /* A helper function to add a type_unit_group to a table. */ | |
5544 | ||
5545 | static int | |
5546 | add_type_unit_group_to_table (void **slot, void *datum) | |
5547 | { | |
5548 | struct type_unit_group *tu_group = *slot; | |
5549 | struct type_unit_group ***datap = datum; | |
5550 | ||
5551 | **datap = tu_group; | |
5552 | ++*datap; | |
5553 | ||
5554 | return 1; | |
5555 | } | |
5556 | ||
5557 | /* Efficiently read all the type units, calling init_cutu_and_read_dies on | |
5558 | each one passing FUNC,DATA. | |
5559 | ||
5560 | The efficiency is because we sort TUs by the abbrev table they use and | |
5561 | only read each abbrev table once. In one program there are 200K TUs | |
5562 | sharing 8K abbrev tables. | |
5563 | ||
5564 | The main purpose of this function is to support building the | |
5565 | dwarf2_per_objfile->type_unit_groups table. | |
5566 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
5567 | can collapse the search space by grouping them by stmt_list. | |
5568 | The savings can be significant, in the same program from above the 200K TUs | |
5569 | share 8K stmt_list tables. | |
5570 | ||
5571 | FUNC is expected to call get_type_unit_group, which will create the | |
5572 | struct type_unit_group if necessary and add it to | |
5573 | dwarf2_per_objfile->type_unit_groups. */ | |
5574 | ||
5575 | static void | |
5576 | build_type_unit_groups (die_reader_func_ftype *func, void *data) | |
5577 | { | |
5578 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5579 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5580 | struct cleanup *cleanups; | |
5581 | struct abbrev_table *abbrev_table; | |
5582 | sect_offset abbrev_offset; | |
5583 | struct tu_abbrev_offset *sorted_by_abbrev; | |
5584 | struct type_unit_group **iter; | |
5585 | int i; | |
5586 | ||
5587 | /* It's up to the caller to not call us multiple times. */ | |
5588 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
5589 | ||
5590 | if (dwarf2_per_objfile->n_type_units == 0) | |
5591 | return; | |
5592 | ||
5593 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
5594 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
5595 | read each abbrev table in. | |
5596 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
5597 | This is simpler and efficient enough for now. | |
5598 | ||
5599 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
5600 | symtab to use). Typically TUs with the same abbrev offset have the same | |
5601 | stmt_list value too so in practice this should work well. | |
5602 | ||
5603 | The basic algorithm here is: | |
5604 | ||
5605 | sort TUs by abbrev table | |
5606 | for each TU with same abbrev table: | |
5607 | read abbrev table if first user | |
5608 | read TU top level DIE | |
5609 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
5610 | call FUNC */ | |
5611 | ||
5612 | if (dwarf2_read_debug) | |
5613 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
5614 | ||
5615 | /* Sort in a separate table to maintain the order of all_type_units | |
5616 | for .gdb_index: TU indices directly index all_type_units. */ | |
5617 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
5618 | dwarf2_per_objfile->n_type_units); | |
5619 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5620 | { | |
5621 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
5622 | ||
5623 | sorted_by_abbrev[i].sig_type = sig_type; | |
5624 | sorted_by_abbrev[i].abbrev_offset = | |
8a0459fd | 5625 | read_abbrev_offset (sig_type->per_cu.section, |
f4dc4d17 DE |
5626 | sig_type->per_cu.offset); |
5627 | } | |
5628 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
5629 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
5630 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
5631 | ||
094b34ac DE |
5632 | /* Note: In the .gdb_index case, get_type_unit_group may have already been |
5633 | called any number of times, so we don't reset tu_stats here. */ | |
5634 | ||
f4dc4d17 DE |
5635 | abbrev_offset.sect_off = ~(unsigned) 0; |
5636 | abbrev_table = NULL; | |
5637 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
5638 | ||
5639 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5640 | { | |
5641 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
5642 | ||
5643 | /* Switch to the next abbrev table if necessary. */ | |
5644 | if (abbrev_table == NULL | |
5645 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
5646 | { | |
5647 | if (abbrev_table != NULL) | |
5648 | { | |
5649 | abbrev_table_free (abbrev_table); | |
5650 | /* Reset to NULL in case abbrev_table_read_table throws | |
5651 | an error: abbrev_table_free_cleanup will get called. */ | |
5652 | abbrev_table = NULL; | |
5653 | } | |
5654 | abbrev_offset = tu->abbrev_offset; | |
5655 | abbrev_table = | |
5656 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
5657 | abbrev_offset); | |
5658 | ++tu_stats->nr_uniq_abbrev_tables; | |
5659 | } | |
5660 | ||
5661 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
5662 | func, data); | |
5663 | } | |
5664 | ||
a2ce51a0 DE |
5665 | /* type_unit_groups can be NULL if there is an error in the debug info. |
5666 | Just create an empty table so the rest of gdb doesn't have to watch | |
5667 | for this error case. */ | |
5668 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5669 | { | |
5670 | dwarf2_per_objfile->type_unit_groups = | |
5671 | allocate_type_unit_groups_table (); | |
5672 | dwarf2_per_objfile->n_type_unit_groups = 0; | |
5673 | } | |
5674 | ||
f4dc4d17 DE |
5675 | /* Create a vector of pointers to primary type units to make it easy to |
5676 | iterate over them and CUs. See dw2_get_primary_cu. */ | |
5677 | dwarf2_per_objfile->n_type_unit_groups = | |
5678 | htab_elements (dwarf2_per_objfile->type_unit_groups); | |
5679 | dwarf2_per_objfile->all_type_unit_groups = | |
5680 | obstack_alloc (&objfile->objfile_obstack, | |
5681 | dwarf2_per_objfile->n_type_unit_groups | |
5682 | * sizeof (struct type_unit_group *)); | |
5683 | iter = &dwarf2_per_objfile->all_type_unit_groups[0]; | |
5684 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5685 | add_type_unit_group_to_table, &iter); | |
5686 | gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0] | |
5687 | == dwarf2_per_objfile->n_type_unit_groups); | |
5688 | ||
5689 | do_cleanups (cleanups); | |
5690 | ||
5691 | if (dwarf2_read_debug) | |
5692 | { | |
5693 | fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n"); | |
5694 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
5695 | dwarf2_per_objfile->n_type_units); | |
5696 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
5697 | tu_stats->nr_uniq_abbrev_tables); | |
5698 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
5699 | tu_stats->nr_symtabs); | |
5700 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
5701 | tu_stats->nr_symtab_sharers); | |
5702 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
5703 | tu_stats->nr_stmt_less_type_units); | |
5704 | } | |
5705 | } | |
0018ea6f DE |
5706 | \f |
5707 | /* Partial symbol tables. */ | |
5708 | ||
5709 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5710 | ||
5711 | The caller must fill in the following details: | |
5712 | dirname, textlow, texthigh. */ | |
5713 | ||
5714 | static struct partial_symtab * | |
5715 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5716 | { | |
5717 | struct objfile *objfile = per_cu->objfile; | |
5718 | struct partial_symtab *pst; | |
5719 | ||
5720 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
5721 | name, 0, | |
5722 | objfile->global_psymbols.next, | |
5723 | objfile->static_psymbols.next); | |
5724 | ||
5725 | pst->psymtabs_addrmap_supported = 1; | |
5726 | ||
5727 | /* This is the glue that links PST into GDB's symbol API. */ | |
5728 | pst->read_symtab_private = per_cu; | |
5729 | pst->read_symtab = dwarf2_read_symtab; | |
5730 | per_cu->v.psymtab = pst; | |
5731 | ||
5732 | return pst; | |
5733 | } | |
5734 | ||
b93601f3 TT |
5735 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
5736 | type. */ | |
5737 | ||
5738 | struct process_psymtab_comp_unit_data | |
5739 | { | |
5740 | /* True if we are reading a DW_TAG_partial_unit. */ | |
5741 | ||
5742 | int want_partial_unit; | |
5743 | ||
5744 | /* The "pretend" language that is used if the CU doesn't declare a | |
5745 | language. */ | |
5746 | ||
5747 | enum language pretend_language; | |
5748 | }; | |
5749 | ||
0018ea6f DE |
5750 | /* die_reader_func for process_psymtab_comp_unit. */ |
5751 | ||
5752 | static void | |
5753 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5754 | const gdb_byte *info_ptr, |
0018ea6f DE |
5755 | struct die_info *comp_unit_die, |
5756 | int has_children, | |
5757 | void *data) | |
5758 | { | |
5759 | struct dwarf2_cu *cu = reader->cu; | |
5760 | struct objfile *objfile = cu->objfile; | |
5761 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
5762 | struct attribute *attr; | |
5763 | CORE_ADDR baseaddr; | |
5764 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5765 | struct partial_symtab *pst; | |
5766 | int has_pc_info; | |
5767 | const char *filename; | |
b93601f3 | 5768 | struct process_psymtab_comp_unit_data *info = data; |
0018ea6f | 5769 | |
b93601f3 | 5770 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
5771 | return; |
5772 | ||
5773 | gdb_assert (! per_cu->is_debug_types); | |
5774 | ||
b93601f3 | 5775 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f DE |
5776 | |
5777 | cu->list_in_scope = &file_symbols; | |
5778 | ||
5779 | /* Allocate a new partial symbol table structure. */ | |
5780 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
5781 | if (attr == NULL || !DW_STRING (attr)) | |
5782 | filename = ""; | |
5783 | else | |
5784 | filename = DW_STRING (attr); | |
5785 | ||
5786 | pst = create_partial_symtab (per_cu, filename); | |
5787 | ||
5788 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
5789 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5790 | if (attr != NULL) | |
5791 | pst->dirname = DW_STRING (attr); | |
5792 | ||
5793 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5794 | ||
5795 | dwarf2_find_base_address (comp_unit_die, cu); | |
5796 | ||
5797 | /* Possibly set the default values of LOWPC and HIGHPC from | |
5798 | `DW_AT_ranges'. */ | |
5799 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, | |
5800 | &best_highpc, cu, pst); | |
5801 | if (has_pc_info == 1 && best_lowpc < best_highpc) | |
5802 | /* Store the contiguous range if it is not empty; it can be empty for | |
5803 | CUs with no code. */ | |
5804 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
5805 | best_lowpc + baseaddr, | |
5806 | best_highpc + baseaddr - 1, pst); | |
5807 | ||
5808 | /* Check if comp unit has_children. | |
5809 | If so, read the rest of the partial symbols from this comp unit. | |
5810 | If not, there's no more debug_info for this comp unit. */ | |
5811 | if (has_children) | |
5812 | { | |
5813 | struct partial_die_info *first_die; | |
5814 | CORE_ADDR lowpc, highpc; | |
5815 | ||
5816 | lowpc = ((CORE_ADDR) -1); | |
5817 | highpc = ((CORE_ADDR) 0); | |
5818 | ||
5819 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5820 | ||
5821 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
5822 | ! has_pc_info, cu); | |
5823 | ||
5824 | /* If we didn't find a lowpc, set it to highpc to avoid | |
5825 | complaints from `maint check'. */ | |
5826 | if (lowpc == ((CORE_ADDR) -1)) | |
5827 | lowpc = highpc; | |
5828 | ||
5829 | /* If the compilation unit didn't have an explicit address range, | |
5830 | then use the information extracted from its child dies. */ | |
5831 | if (! has_pc_info) | |
5832 | { | |
5833 | best_lowpc = lowpc; | |
5834 | best_highpc = highpc; | |
5835 | } | |
5836 | } | |
5837 | pst->textlow = best_lowpc + baseaddr; | |
5838 | pst->texthigh = best_highpc + baseaddr; | |
5839 | ||
5840 | pst->n_global_syms = objfile->global_psymbols.next - | |
5841 | (objfile->global_psymbols.list + pst->globals_offset); | |
5842 | pst->n_static_syms = objfile->static_psymbols.next - | |
5843 | (objfile->static_psymbols.list + pst->statics_offset); | |
5844 | sort_pst_symbols (objfile, pst); | |
5845 | ||
5846 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
5847 | { | |
5848 | int i; | |
5849 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5850 | struct dwarf2_per_cu_data *iter; | |
5851 | ||
5852 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
5853 | post-pass. */ | |
5854 | pst->number_of_dependencies = len; | |
5855 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5856 | len * sizeof (struct symtab *)); | |
5857 | for (i = 0; | |
5858 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
5859 | i, iter); | |
5860 | ++i) | |
5861 | pst->dependencies[i] = iter->v.psymtab; | |
5862 | ||
5863 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5864 | } | |
5865 | ||
5866 | /* Get the list of files included in the current compilation unit, | |
5867 | and build a psymtab for each of them. */ | |
5868 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
5869 | ||
5870 | if (dwarf2_read_debug) | |
5871 | { | |
5872 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
5873 | ||
5874 | fprintf_unfiltered (gdb_stdlog, | |
5875 | "Psymtab for %s unit @0x%x: %s - %s" | |
5876 | ", %d global, %d static syms\n", | |
5877 | per_cu->is_debug_types ? "type" : "comp", | |
5878 | per_cu->offset.sect_off, | |
5879 | paddress (gdbarch, pst->textlow), | |
5880 | paddress (gdbarch, pst->texthigh), | |
5881 | pst->n_global_syms, pst->n_static_syms); | |
5882 | } | |
5883 | } | |
5884 | ||
5885 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5886 | Process compilation unit THIS_CU for a psymtab. */ | |
5887 | ||
5888 | static void | |
5889 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
5890 | int want_partial_unit, |
5891 | enum language pretend_language) | |
0018ea6f | 5892 | { |
b93601f3 TT |
5893 | struct process_psymtab_comp_unit_data info; |
5894 | ||
0018ea6f DE |
5895 | /* If this compilation unit was already read in, free the |
5896 | cached copy in order to read it in again. This is | |
5897 | necessary because we skipped some symbols when we first | |
5898 | read in the compilation unit (see load_partial_dies). | |
5899 | This problem could be avoided, but the benefit is unclear. */ | |
5900 | if (this_cu->cu != NULL) | |
5901 | free_one_cached_comp_unit (this_cu); | |
5902 | ||
5903 | gdb_assert (! this_cu->is_debug_types); | |
b93601f3 TT |
5904 | info.want_partial_unit = want_partial_unit; |
5905 | info.pretend_language = pretend_language; | |
0018ea6f DE |
5906 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
5907 | process_psymtab_comp_unit_reader, | |
b93601f3 | 5908 | &info); |
0018ea6f DE |
5909 | |
5910 | /* Age out any secondary CUs. */ | |
5911 | age_cached_comp_units (); | |
5912 | } | |
f4dc4d17 DE |
5913 | |
5914 | /* Reader function for build_type_psymtabs. */ | |
5915 | ||
5916 | static void | |
5917 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5918 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
5919 | struct die_info *type_unit_die, |
5920 | int has_children, | |
5921 | void *data) | |
5922 | { | |
5923 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5924 | struct dwarf2_cu *cu = reader->cu; | |
5925 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 5926 | struct signatured_type *sig_type; |
f4dc4d17 DE |
5927 | struct type_unit_group *tu_group; |
5928 | struct attribute *attr; | |
5929 | struct partial_die_info *first_die; | |
5930 | CORE_ADDR lowpc, highpc; | |
5931 | struct partial_symtab *pst; | |
5932 | ||
5933 | gdb_assert (data == NULL); | |
0186c6a7 DE |
5934 | gdb_assert (per_cu->is_debug_types); |
5935 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
5936 | |
5937 | if (! has_children) | |
5938 | return; | |
5939 | ||
5940 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 5941 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 5942 | |
0186c6a7 | 5943 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
5944 | |
5945 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
5946 | cu->list_in_scope = &file_symbols; | |
5947 | pst = create_partial_symtab (per_cu, ""); | |
5948 | pst->anonymous = 1; | |
5949 | ||
5950 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5951 | ||
5952 | lowpc = (CORE_ADDR) -1; | |
5953 | highpc = (CORE_ADDR) 0; | |
5954 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
5955 | ||
5956 | pst->n_global_syms = objfile->global_psymbols.next - | |
5957 | (objfile->global_psymbols.list + pst->globals_offset); | |
5958 | pst->n_static_syms = objfile->static_psymbols.next - | |
5959 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 5960 | sort_pst_symbols (objfile, pst); |
f4dc4d17 DE |
5961 | } |
5962 | ||
5963 | /* Traversal function for build_type_psymtabs. */ | |
5964 | ||
5965 | static int | |
5966 | build_type_psymtab_dependencies (void **slot, void *info) | |
5967 | { | |
5968 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5969 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 5970 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 5971 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
5972 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
5973 | struct signatured_type *iter; | |
f4dc4d17 DE |
5974 | int i; |
5975 | ||
5976 | gdb_assert (len > 0); | |
0186c6a7 | 5977 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
5978 | |
5979 | pst->number_of_dependencies = len; | |
5980 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5981 | len * sizeof (struct psymtab *)); | |
5982 | for (i = 0; | |
0186c6a7 | 5983 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
5984 | ++i) |
5985 | { | |
0186c6a7 DE |
5986 | gdb_assert (iter->per_cu.is_debug_types); |
5987 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 5988 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
5989 | } |
5990 | ||
0186c6a7 | 5991 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
5992 | |
5993 | return 1; | |
5994 | } | |
5995 | ||
5996 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5997 | Build partial symbol tables for the .debug_types comp-units. */ | |
5998 | ||
5999 | static void | |
6000 | build_type_psymtabs (struct objfile *objfile) | |
6001 | { | |
0e50663e | 6002 | if (! create_all_type_units (objfile)) |
348e048f DE |
6003 | return; |
6004 | ||
f4dc4d17 DE |
6005 | build_type_unit_groups (build_type_psymtabs_reader, NULL); |
6006 | ||
6007 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
6008 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
6009 | build_type_psymtab_dependencies, NULL); | |
348e048f DE |
6010 | } |
6011 | ||
60606b2c TT |
6012 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
6013 | ||
6014 | static void | |
6015 | psymtabs_addrmap_cleanup (void *o) | |
6016 | { | |
6017 | struct objfile *objfile = o; | |
ec61707d | 6018 | |
60606b2c TT |
6019 | objfile->psymtabs_addrmap = NULL; |
6020 | } | |
6021 | ||
95554aad TT |
6022 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
6023 | ||
6024 | static void | |
6025 | set_partial_user (struct objfile *objfile) | |
6026 | { | |
6027 | int i; | |
6028 | ||
6029 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
6030 | { | |
6031 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
6032 | struct partial_symtab *pst = per_cu->v.psymtab; | |
6033 | int j; | |
6034 | ||
36586728 TT |
6035 | if (pst == NULL) |
6036 | continue; | |
6037 | ||
95554aad TT |
6038 | for (j = 0; j < pst->number_of_dependencies; ++j) |
6039 | { | |
6040 | /* Set the 'user' field only if it is not already set. */ | |
6041 | if (pst->dependencies[j]->user == NULL) | |
6042 | pst->dependencies[j]->user = pst; | |
6043 | } | |
6044 | } | |
6045 | } | |
6046 | ||
93311388 DE |
6047 | /* Build the partial symbol table by doing a quick pass through the |
6048 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 6049 | |
93311388 | 6050 | static void |
c67a9c90 | 6051 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 6052 | { |
60606b2c TT |
6053 | struct cleanup *back_to, *addrmap_cleanup; |
6054 | struct obstack temp_obstack; | |
21b2bd31 | 6055 | int i; |
93311388 | 6056 | |
45cfd468 DE |
6057 | if (dwarf2_read_debug) |
6058 | { | |
6059 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 6060 | objfile_name (objfile)); |
45cfd468 DE |
6061 | } |
6062 | ||
98bfdba5 PA |
6063 | dwarf2_per_objfile->reading_partial_symbols = 1; |
6064 | ||
be391dca | 6065 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 6066 | |
93311388 DE |
6067 | /* Any cached compilation units will be linked by the per-objfile |
6068 | read_in_chain. Make sure to free them when we're done. */ | |
6069 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 6070 | |
348e048f DE |
6071 | build_type_psymtabs (objfile); |
6072 | ||
93311388 | 6073 | create_all_comp_units (objfile); |
c906108c | 6074 | |
60606b2c TT |
6075 | /* Create a temporary address map on a temporary obstack. We later |
6076 | copy this to the final obstack. */ | |
6077 | obstack_init (&temp_obstack); | |
6078 | make_cleanup_obstack_free (&temp_obstack); | |
6079 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
6080 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 6081 | |
21b2bd31 | 6082 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 6083 | { |
21b2bd31 | 6084 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
aaa75496 | 6085 | |
b93601f3 | 6086 | process_psymtab_comp_unit (per_cu, 0, language_minimal); |
c906108c | 6087 | } |
ff013f42 | 6088 | |
95554aad TT |
6089 | set_partial_user (objfile); |
6090 | ||
ff013f42 JK |
6091 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
6092 | &objfile->objfile_obstack); | |
60606b2c | 6093 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 6094 | |
ae038cb0 | 6095 | do_cleanups (back_to); |
45cfd468 DE |
6096 | |
6097 | if (dwarf2_read_debug) | |
6098 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
4262abfb | 6099 | objfile_name (objfile)); |
ae038cb0 DJ |
6100 | } |
6101 | ||
3019eac3 | 6102 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
6103 | |
6104 | static void | |
dee91e82 | 6105 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 6106 | const gdb_byte *info_ptr, |
dee91e82 DE |
6107 | struct die_info *comp_unit_die, |
6108 | int has_children, | |
6109 | void *data) | |
ae038cb0 | 6110 | { |
dee91e82 | 6111 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 6112 | |
95554aad | 6113 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 6114 | |
ae038cb0 DJ |
6115 | /* Check if comp unit has_children. |
6116 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 6117 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 6118 | if (has_children) |
dee91e82 DE |
6119 | load_partial_dies (reader, info_ptr, 0); |
6120 | } | |
98bfdba5 | 6121 | |
dee91e82 DE |
6122 | /* Load the partial DIEs for a secondary CU into memory. |
6123 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 6124 | |
dee91e82 DE |
6125 | static void |
6126 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
6127 | { | |
f4dc4d17 DE |
6128 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6129 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
6130 | } |
6131 | ||
ae038cb0 | 6132 | static void |
36586728 TT |
6133 | read_comp_units_from_section (struct objfile *objfile, |
6134 | struct dwarf2_section_info *section, | |
6135 | unsigned int is_dwz, | |
6136 | int *n_allocated, | |
6137 | int *n_comp_units, | |
6138 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 6139 | { |
d521ce57 | 6140 | const gdb_byte *info_ptr; |
a32a8923 | 6141 | bfd *abfd = get_section_bfd_owner (section); |
be391dca | 6142 | |
bf6af496 DE |
6143 | if (dwarf2_read_debug) |
6144 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", | |
a32a8923 DE |
6145 | get_section_name (section), |
6146 | get_section_file_name (section)); | |
bf6af496 | 6147 | |
36586728 | 6148 | dwarf2_read_section (objfile, section); |
ae038cb0 | 6149 | |
36586728 | 6150 | info_ptr = section->buffer; |
6e70227d | 6151 | |
36586728 | 6152 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 6153 | { |
c764a876 | 6154 | unsigned int length, initial_length_size; |
ae038cb0 | 6155 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 6156 | sect_offset offset; |
ae038cb0 | 6157 | |
36586728 | 6158 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
6159 | |
6160 | /* Read just enough information to find out where the next | |
6161 | compilation unit is. */ | |
36586728 | 6162 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
6163 | |
6164 | /* Save the compilation unit for later lookup. */ | |
6165 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
6166 | sizeof (struct dwarf2_per_cu_data)); | |
6167 | memset (this_cu, 0, sizeof (*this_cu)); | |
6168 | this_cu->offset = offset; | |
c764a876 | 6169 | this_cu->length = length + initial_length_size; |
36586728 | 6170 | this_cu->is_dwz = is_dwz; |
9291a0cd | 6171 | this_cu->objfile = objfile; |
8a0459fd | 6172 | this_cu->section = section; |
ae038cb0 | 6173 | |
36586728 | 6174 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 6175 | { |
36586728 TT |
6176 | *n_allocated *= 2; |
6177 | *all_comp_units = xrealloc (*all_comp_units, | |
6178 | *n_allocated | |
6179 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 6180 | } |
36586728 TT |
6181 | (*all_comp_units)[*n_comp_units] = this_cu; |
6182 | ++*n_comp_units; | |
ae038cb0 DJ |
6183 | |
6184 | info_ptr = info_ptr + this_cu->length; | |
6185 | } | |
36586728 TT |
6186 | } |
6187 | ||
6188 | /* Create a list of all compilation units in OBJFILE. | |
6189 | This is only done for -readnow and building partial symtabs. */ | |
6190 | ||
6191 | static void | |
6192 | create_all_comp_units (struct objfile *objfile) | |
6193 | { | |
6194 | int n_allocated; | |
6195 | int n_comp_units; | |
6196 | struct dwarf2_per_cu_data **all_comp_units; | |
4db1a1dc | 6197 | struct dwz_file *dwz; |
36586728 TT |
6198 | |
6199 | n_comp_units = 0; | |
6200 | n_allocated = 10; | |
6201 | all_comp_units = xmalloc (n_allocated | |
6202 | * sizeof (struct dwarf2_per_cu_data *)); | |
6203 | ||
6204 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
6205 | &n_allocated, &n_comp_units, &all_comp_units); | |
6206 | ||
4db1a1dc TT |
6207 | dwz = dwarf2_get_dwz_file (); |
6208 | if (dwz != NULL) | |
6209 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
6210 | &n_allocated, &n_comp_units, | |
6211 | &all_comp_units); | |
ae038cb0 DJ |
6212 | |
6213 | dwarf2_per_objfile->all_comp_units | |
6214 | = obstack_alloc (&objfile->objfile_obstack, | |
6215 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6216 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
6217 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
6218 | xfree (all_comp_units); | |
6219 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
6220 | } |
6221 | ||
5734ee8b DJ |
6222 | /* Process all loaded DIEs for compilation unit CU, starting at |
6223 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
6224 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
6225 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
6226 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
6227 | and record the covered ranges in the addrmap. */ | |
c906108c | 6228 | |
72bf9492 DJ |
6229 | static void |
6230 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 6231 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 6232 | { |
72bf9492 | 6233 | struct partial_die_info *pdi; |
c906108c | 6234 | |
91c24f0a DC |
6235 | /* Now, march along the PDI's, descending into ones which have |
6236 | interesting children but skipping the children of the other ones, | |
6237 | until we reach the end of the compilation unit. */ | |
c906108c | 6238 | |
72bf9492 | 6239 | pdi = first_die; |
91c24f0a | 6240 | |
72bf9492 DJ |
6241 | while (pdi != NULL) |
6242 | { | |
6243 | fixup_partial_die (pdi, cu); | |
c906108c | 6244 | |
f55ee35c | 6245 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
6246 | children, so we need to look at them. Ditto for anonymous |
6247 | enums. */ | |
933c6fe4 | 6248 | |
72bf9492 | 6249 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
6250 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
6251 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 6252 | { |
72bf9492 | 6253 | switch (pdi->tag) |
c906108c SS |
6254 | { |
6255 | case DW_TAG_subprogram: | |
5734ee8b | 6256 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c | 6257 | break; |
72929c62 | 6258 | case DW_TAG_constant: |
c906108c SS |
6259 | case DW_TAG_variable: |
6260 | case DW_TAG_typedef: | |
91c24f0a | 6261 | case DW_TAG_union_type: |
72bf9492 | 6262 | if (!pdi->is_declaration) |
63d06c5c | 6263 | { |
72bf9492 | 6264 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
6265 | } |
6266 | break; | |
c906108c | 6267 | case DW_TAG_class_type: |
680b30c7 | 6268 | case DW_TAG_interface_type: |
c906108c | 6269 | case DW_TAG_structure_type: |
72bf9492 | 6270 | if (!pdi->is_declaration) |
c906108c | 6271 | { |
72bf9492 | 6272 | add_partial_symbol (pdi, cu); |
c906108c SS |
6273 | } |
6274 | break; | |
91c24f0a | 6275 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
6276 | if (!pdi->is_declaration) |
6277 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
6278 | break; |
6279 | case DW_TAG_base_type: | |
a02abb62 | 6280 | case DW_TAG_subrange_type: |
c906108c | 6281 | /* File scope base type definitions are added to the partial |
c5aa993b | 6282 | symbol table. */ |
72bf9492 | 6283 | add_partial_symbol (pdi, cu); |
c906108c | 6284 | break; |
d9fa45fe | 6285 | case DW_TAG_namespace: |
5734ee8b | 6286 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 6287 | break; |
5d7cb8df JK |
6288 | case DW_TAG_module: |
6289 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
6290 | break; | |
95554aad TT |
6291 | case DW_TAG_imported_unit: |
6292 | { | |
6293 | struct dwarf2_per_cu_data *per_cu; | |
6294 | ||
f4dc4d17 DE |
6295 | /* For now we don't handle imported units in type units. */ |
6296 | if (cu->per_cu->is_debug_types) | |
6297 | { | |
6298 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
6299 | " supported in type units [in module %s]"), | |
4262abfb | 6300 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
6301 | } |
6302 | ||
95554aad | 6303 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 6304 | pdi->is_dwz, |
95554aad TT |
6305 | cu->objfile); |
6306 | ||
6307 | /* Go read the partial unit, if needed. */ | |
6308 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 6309 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 6310 | |
f4dc4d17 | 6311 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 6312 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
6313 | } |
6314 | break; | |
c906108c SS |
6315 | default: |
6316 | break; | |
6317 | } | |
6318 | } | |
6319 | ||
72bf9492 DJ |
6320 | /* If the die has a sibling, skip to the sibling. */ |
6321 | ||
6322 | pdi = pdi->die_sibling; | |
6323 | } | |
6324 | } | |
6325 | ||
6326 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 6327 | |
72bf9492 | 6328 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
6329 | name is concatenated with "::" and the partial DIE's name. For |
6330 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
6331 | Enumerators are an exception; they use the scope of their parent |
6332 | enumeration type, i.e. the name of the enumeration type is not | |
6333 | prepended to the enumerator. | |
91c24f0a | 6334 | |
72bf9492 DJ |
6335 | There are two complexities. One is DW_AT_specification; in this |
6336 | case "parent" means the parent of the target of the specification, | |
6337 | instead of the direct parent of the DIE. The other is compilers | |
6338 | which do not emit DW_TAG_namespace; in this case we try to guess | |
6339 | the fully qualified name of structure types from their members' | |
6340 | linkage names. This must be done using the DIE's children rather | |
6341 | than the children of any DW_AT_specification target. We only need | |
6342 | to do this for structures at the top level, i.e. if the target of | |
6343 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
6344 | have a parent. */ | |
6345 | ||
6346 | /* Compute the scope prefix associated with PDI's parent, in | |
6347 | compilation unit CU. The result will be allocated on CU's | |
6348 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
6349 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 6350 | static const char * |
72bf9492 DJ |
6351 | partial_die_parent_scope (struct partial_die_info *pdi, |
6352 | struct dwarf2_cu *cu) | |
6353 | { | |
15d034d0 | 6354 | const char *grandparent_scope; |
72bf9492 | 6355 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 6356 | |
72bf9492 DJ |
6357 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
6358 | then this means the parent of the specification DIE. */ | |
6359 | ||
6360 | real_pdi = pdi; | |
72bf9492 | 6361 | while (real_pdi->has_specification) |
36586728 TT |
6362 | real_pdi = find_partial_die (real_pdi->spec_offset, |
6363 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
6364 | |
6365 | parent = real_pdi->die_parent; | |
6366 | if (parent == NULL) | |
6367 | return NULL; | |
6368 | ||
6369 | if (parent->scope_set) | |
6370 | return parent->scope; | |
6371 | ||
6372 | fixup_partial_die (parent, cu); | |
6373 | ||
10b3939b | 6374 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 6375 | |
acebe513 UW |
6376 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
6377 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
6378 | Work around this problem here. */ | |
6379 | if (cu->language == language_cplus | |
6e70227d | 6380 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
6381 | && strcmp (parent->name, "::") == 0 |
6382 | && grandparent_scope == NULL) | |
6383 | { | |
6384 | parent->scope = NULL; | |
6385 | parent->scope_set = 1; | |
6386 | return NULL; | |
6387 | } | |
6388 | ||
9c6c53f7 SA |
6389 | if (pdi->tag == DW_TAG_enumerator) |
6390 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
6391 | parent->scope = grandparent_scope; | |
6392 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 6393 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
6394 | || parent->tag == DW_TAG_structure_type |
6395 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 6396 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
6397 | || parent->tag == DW_TAG_union_type |
6398 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
6399 | { |
6400 | if (grandparent_scope == NULL) | |
6401 | parent->scope = parent->name; | |
6402 | else | |
3e43a32a MS |
6403 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
6404 | grandparent_scope, | |
f55ee35c | 6405 | parent->name, 0, cu); |
72bf9492 | 6406 | } |
72bf9492 DJ |
6407 | else |
6408 | { | |
6409 | /* FIXME drow/2004-04-01: What should we be doing with | |
6410 | function-local names? For partial symbols, we should probably be | |
6411 | ignoring them. */ | |
6412 | complaint (&symfile_complaints, | |
e2e0b3e5 | 6413 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 6414 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 6415 | parent->scope = grandparent_scope; |
c906108c SS |
6416 | } |
6417 | ||
72bf9492 DJ |
6418 | parent->scope_set = 1; |
6419 | return parent->scope; | |
6420 | } | |
6421 | ||
6422 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6423 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6424 | |
72bf9492 DJ |
6425 | static char * |
6426 | partial_die_full_name (struct partial_die_info *pdi, | |
6427 | struct dwarf2_cu *cu) | |
6428 | { | |
15d034d0 | 6429 | const char *parent_scope; |
72bf9492 | 6430 | |
98bfdba5 PA |
6431 | /* If this is a template instantiation, we can not work out the |
6432 | template arguments from partial DIEs. So, unfortunately, we have | |
6433 | to go through the full DIEs. At least any work we do building | |
6434 | types here will be reused if full symbols are loaded later. */ | |
6435 | if (pdi->has_template_arguments) | |
6436 | { | |
6437 | fixup_partial_die (pdi, cu); | |
6438 | ||
6439 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6440 | { | |
6441 | struct die_info *die; | |
6442 | struct attribute attr; | |
6443 | struct dwarf2_cu *ref_cu = cu; | |
6444 | ||
b64f50a1 | 6445 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
6446 | attr.name = 0; |
6447 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 6448 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6449 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6450 | ||
6451 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6452 | } | |
6453 | } | |
6454 | ||
72bf9492 DJ |
6455 | parent_scope = partial_die_parent_scope (pdi, cu); |
6456 | if (parent_scope == NULL) | |
6457 | return NULL; | |
6458 | else | |
f55ee35c | 6459 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6460 | } |
6461 | ||
6462 | static void | |
72bf9492 | 6463 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6464 | { |
e7c27a73 | 6465 | struct objfile *objfile = cu->objfile; |
c906108c | 6466 | CORE_ADDR addr = 0; |
15d034d0 | 6467 | const char *actual_name = NULL; |
e142c38c | 6468 | CORE_ADDR baseaddr; |
15d034d0 | 6469 | char *built_actual_name; |
e142c38c DJ |
6470 | |
6471 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6472 | |
15d034d0 TT |
6473 | built_actual_name = partial_die_full_name (pdi, cu); |
6474 | if (built_actual_name != NULL) | |
6475 | actual_name = built_actual_name; | |
63d06c5c | 6476 | |
72bf9492 DJ |
6477 | if (actual_name == NULL) |
6478 | actual_name = pdi->name; | |
6479 | ||
c906108c SS |
6480 | switch (pdi->tag) |
6481 | { | |
6482 | case DW_TAG_subprogram: | |
2cfa0c8d | 6483 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6484 | { |
2cfa0c8d JB |
6485 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6486 | of the global scope. But in Ada, we want to be able to access | |
6487 | nested procedures globally. So all Ada subprograms are stored | |
6488 | in the global scope. */ | |
f47fb265 | 6489 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6490 | mst_text, objfile); */ |
f47fb265 | 6491 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6492 | built_actual_name != NULL, |
f47fb265 MS |
6493 | VAR_DOMAIN, LOC_BLOCK, |
6494 | &objfile->global_psymbols, | |
6495 | 0, pdi->lowpc + baseaddr, | |
6496 | cu->language, objfile); | |
c906108c SS |
6497 | } |
6498 | else | |
6499 | { | |
f47fb265 | 6500 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6501 | mst_file_text, objfile); */ |
f47fb265 | 6502 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6503 | built_actual_name != NULL, |
f47fb265 MS |
6504 | VAR_DOMAIN, LOC_BLOCK, |
6505 | &objfile->static_psymbols, | |
6506 | 0, pdi->lowpc + baseaddr, | |
6507 | cu->language, objfile); | |
c906108c SS |
6508 | } |
6509 | break; | |
72929c62 JB |
6510 | case DW_TAG_constant: |
6511 | { | |
6512 | struct psymbol_allocation_list *list; | |
6513 | ||
6514 | if (pdi->is_external) | |
6515 | list = &objfile->global_psymbols; | |
6516 | else | |
6517 | list = &objfile->static_psymbols; | |
f47fb265 | 6518 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6519 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
f47fb265 | 6520 | list, 0, 0, cu->language, objfile); |
72929c62 JB |
6521 | } |
6522 | break; | |
c906108c | 6523 | case DW_TAG_variable: |
95554aad TT |
6524 | if (pdi->d.locdesc) |
6525 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6526 | |
95554aad | 6527 | if (pdi->d.locdesc |
caac4577 JG |
6528 | && addr == 0 |
6529 | && !dwarf2_per_objfile->has_section_at_zero) | |
6530 | { | |
6531 | /* A global or static variable may also have been stripped | |
6532 | out by the linker if unused, in which case its address | |
6533 | will be nullified; do not add such variables into partial | |
6534 | symbol table then. */ | |
6535 | } | |
6536 | else if (pdi->is_external) | |
c906108c SS |
6537 | { |
6538 | /* Global Variable. | |
6539 | Don't enter into the minimal symbol tables as there is | |
6540 | a minimal symbol table entry from the ELF symbols already. | |
6541 | Enter into partial symbol table if it has a location | |
6542 | descriptor or a type. | |
6543 | If the location descriptor is missing, new_symbol will create | |
6544 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6545 | be determined from the minimal symbol table whenever the variable | |
6546 | is referenced. | |
6547 | The address for the partial symbol table entry is not | |
6548 | used by GDB, but it comes in handy for debugging partial symbol | |
6549 | table building. */ | |
6550 | ||
95554aad | 6551 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6552 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6553 | built_actual_name != NULL, |
f47fb265 MS |
6554 | VAR_DOMAIN, LOC_STATIC, |
6555 | &objfile->global_psymbols, | |
6556 | 0, addr + baseaddr, | |
6557 | cu->language, objfile); | |
c906108c SS |
6558 | } |
6559 | else | |
6560 | { | |
0963b4bd | 6561 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 6562 | if (pdi->d.locdesc == NULL) |
decbce07 | 6563 | { |
15d034d0 | 6564 | xfree (built_actual_name); |
decbce07 MS |
6565 | return; |
6566 | } | |
f47fb265 | 6567 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 6568 | mst_file_data, objfile); */ |
f47fb265 | 6569 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6570 | built_actual_name != NULL, |
f47fb265 MS |
6571 | VAR_DOMAIN, LOC_STATIC, |
6572 | &objfile->static_psymbols, | |
6573 | 0, addr + baseaddr, | |
6574 | cu->language, objfile); | |
c906108c SS |
6575 | } |
6576 | break; | |
6577 | case DW_TAG_typedef: | |
6578 | case DW_TAG_base_type: | |
a02abb62 | 6579 | case DW_TAG_subrange_type: |
38d518c9 | 6580 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6581 | built_actual_name != NULL, |
176620f1 | 6582 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 6583 | &objfile->static_psymbols, |
e142c38c | 6584 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6585 | break; |
72bf9492 DJ |
6586 | case DW_TAG_namespace: |
6587 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 6588 | built_actual_name != NULL, |
72bf9492 DJ |
6589 | VAR_DOMAIN, LOC_TYPEDEF, |
6590 | &objfile->global_psymbols, | |
6591 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6592 | break; | |
c906108c | 6593 | case DW_TAG_class_type: |
680b30c7 | 6594 | case DW_TAG_interface_type: |
c906108c SS |
6595 | case DW_TAG_structure_type: |
6596 | case DW_TAG_union_type: | |
6597 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
6598 | /* Skip external references. The DWARF standard says in the section |
6599 | about "Structure, Union, and Class Type Entries": "An incomplete | |
6600 | structure, union or class type is represented by a structure, | |
6601 | union or class entry that does not have a byte size attribute | |
6602 | and that has a DW_AT_declaration attribute." */ | |
6603 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 6604 | { |
15d034d0 | 6605 | xfree (built_actual_name); |
decbce07 MS |
6606 | return; |
6607 | } | |
fa4028e9 | 6608 | |
63d06c5c DC |
6609 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
6610 | static vs. global. */ | |
38d518c9 | 6611 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6612 | built_actual_name != NULL, |
176620f1 | 6613 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
6614 | (cu->language == language_cplus |
6615 | || cu->language == language_java) | |
63d06c5c DC |
6616 | ? &objfile->global_psymbols |
6617 | : &objfile->static_psymbols, | |
e142c38c | 6618 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6619 | |
c906108c SS |
6620 | break; |
6621 | case DW_TAG_enumerator: | |
38d518c9 | 6622 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6623 | built_actual_name != NULL, |
176620f1 | 6624 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
6625 | (cu->language == language_cplus |
6626 | || cu->language == language_java) | |
f6fe98ef DJ |
6627 | ? &objfile->global_psymbols |
6628 | : &objfile->static_psymbols, | |
e142c38c | 6629 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
6630 | break; |
6631 | default: | |
6632 | break; | |
6633 | } | |
5c4e30ca | 6634 | |
15d034d0 | 6635 | xfree (built_actual_name); |
c906108c SS |
6636 | } |
6637 | ||
5c4e30ca DC |
6638 | /* Read a partial die corresponding to a namespace; also, add a symbol |
6639 | corresponding to that namespace to the symbol table. NAMESPACE is | |
6640 | the name of the enclosing namespace. */ | |
91c24f0a | 6641 | |
72bf9492 DJ |
6642 | static void |
6643 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6644 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 6645 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 6646 | { |
72bf9492 | 6647 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6648 | |
72bf9492 | 6649 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6650 | |
6651 | /* Now scan partial symbols in that namespace. */ | |
6652 | ||
91c24f0a | 6653 | if (pdi->has_children) |
5734ee8b | 6654 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
6655 | } |
6656 | ||
5d7cb8df JK |
6657 | /* Read a partial die corresponding to a Fortran module. */ |
6658 | ||
6659 | static void | |
6660 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
6661 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
6662 | { | |
f55ee35c | 6663 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
6664 | |
6665 | if (pdi->has_children) | |
6666 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
6667 | } | |
6668 | ||
bc30ff58 JB |
6669 | /* Read a partial die corresponding to a subprogram and create a partial |
6670 | symbol for that subprogram. When the CU language allows it, this | |
6671 | routine also defines a partial symbol for each nested subprogram | |
6672 | that this subprogram contains. | |
6e70227d | 6673 | |
bc30ff58 JB |
6674 | DIE my also be a lexical block, in which case we simply search |
6675 | recursively for suprograms defined inside that lexical block. | |
6676 | Again, this is only performed when the CU language allows this | |
6677 | type of definitions. */ | |
6678 | ||
6679 | static void | |
6680 | add_partial_subprogram (struct partial_die_info *pdi, | |
6681 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 6682 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
6683 | { |
6684 | if (pdi->tag == DW_TAG_subprogram) | |
6685 | { | |
6686 | if (pdi->has_pc_info) | |
6687 | { | |
6688 | if (pdi->lowpc < *lowpc) | |
6689 | *lowpc = pdi->lowpc; | |
6690 | if (pdi->highpc > *highpc) | |
6691 | *highpc = pdi->highpc; | |
5734ee8b DJ |
6692 | if (need_pc) |
6693 | { | |
6694 | CORE_ADDR baseaddr; | |
6695 | struct objfile *objfile = cu->objfile; | |
6696 | ||
6697 | baseaddr = ANOFFSET (objfile->section_offsets, | |
6698 | SECT_OFF_TEXT (objfile)); | |
6699 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
6700 | pdi->lowpc + baseaddr, |
6701 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 6702 | cu->per_cu->v.psymtab); |
5734ee8b | 6703 | } |
481860b3 GB |
6704 | } |
6705 | ||
6706 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
6707 | { | |
bc30ff58 | 6708 | if (!pdi->is_declaration) |
e8d05480 JB |
6709 | /* Ignore subprogram DIEs that do not have a name, they are |
6710 | illegal. Do not emit a complaint at this point, we will | |
6711 | do so when we convert this psymtab into a symtab. */ | |
6712 | if (pdi->name) | |
6713 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
6714 | } |
6715 | } | |
6e70227d | 6716 | |
bc30ff58 JB |
6717 | if (! pdi->has_children) |
6718 | return; | |
6719 | ||
6720 | if (cu->language == language_ada) | |
6721 | { | |
6722 | pdi = pdi->die_child; | |
6723 | while (pdi != NULL) | |
6724 | { | |
6725 | fixup_partial_die (pdi, cu); | |
6726 | if (pdi->tag == DW_TAG_subprogram | |
6727 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 6728 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
6729 | pdi = pdi->die_sibling; |
6730 | } | |
6731 | } | |
6732 | } | |
6733 | ||
91c24f0a DC |
6734 | /* Read a partial die corresponding to an enumeration type. */ |
6735 | ||
72bf9492 DJ |
6736 | static void |
6737 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
6738 | struct dwarf2_cu *cu) | |
91c24f0a | 6739 | { |
72bf9492 | 6740 | struct partial_die_info *pdi; |
91c24f0a DC |
6741 | |
6742 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
6743 | add_partial_symbol (enum_pdi, cu); |
6744 | ||
6745 | pdi = enum_pdi->die_child; | |
6746 | while (pdi) | |
91c24f0a | 6747 | { |
72bf9492 | 6748 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 6749 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 6750 | else |
72bf9492 DJ |
6751 | add_partial_symbol (pdi, cu); |
6752 | pdi = pdi->die_sibling; | |
91c24f0a | 6753 | } |
91c24f0a DC |
6754 | } |
6755 | ||
6caca83c CC |
6756 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
6757 | ||
6758 | static unsigned int | |
d521ce57 | 6759 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
6760 | { |
6761 | unsigned int bytes_read; | |
6762 | ||
6763 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6764 | } | |
6765 | ||
4bb7a0a7 DJ |
6766 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
6767 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
6768 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
6769 | the initial number. */ | |
6770 | ||
6771 | static struct abbrev_info * | |
d521ce57 | 6772 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 6773 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
6774 | { |
6775 | bfd *abfd = cu->objfile->obfd; | |
6776 | unsigned int abbrev_number; | |
6777 | struct abbrev_info *abbrev; | |
6778 | ||
6779 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
6780 | ||
6781 | if (abbrev_number == 0) | |
6782 | return NULL; | |
6783 | ||
433df2d4 | 6784 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
6785 | if (!abbrev) |
6786 | { | |
3e43a32a MS |
6787 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
6788 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
6789 | } |
6790 | ||
6791 | return abbrev; | |
6792 | } | |
6793 | ||
93311388 DE |
6794 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6795 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
6796 | DIE. Any children of the skipped DIEs will also be skipped. */ |
6797 | ||
d521ce57 TT |
6798 | static const gdb_byte * |
6799 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 6800 | { |
dee91e82 | 6801 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
6802 | struct abbrev_info *abbrev; |
6803 | unsigned int bytes_read; | |
6804 | ||
6805 | while (1) | |
6806 | { | |
6807 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
6808 | if (abbrev == NULL) | |
6809 | return info_ptr + bytes_read; | |
6810 | else | |
dee91e82 | 6811 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
6812 | } |
6813 | } | |
6814 | ||
93311388 DE |
6815 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6816 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
6817 | abbrev corresponding to that skipped uleb128 should be passed in |
6818 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
6819 | children. */ | |
6820 | ||
d521ce57 TT |
6821 | static const gdb_byte * |
6822 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 6823 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
6824 | { |
6825 | unsigned int bytes_read; | |
6826 | struct attribute attr; | |
dee91e82 DE |
6827 | bfd *abfd = reader->abfd; |
6828 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 6829 | const gdb_byte *buffer = reader->buffer; |
f664829e | 6830 | const gdb_byte *buffer_end = reader->buffer_end; |
d521ce57 | 6831 | const gdb_byte *start_info_ptr = info_ptr; |
4bb7a0a7 DJ |
6832 | unsigned int form, i; |
6833 | ||
6834 | for (i = 0; i < abbrev->num_attrs; i++) | |
6835 | { | |
6836 | /* The only abbrev we care about is DW_AT_sibling. */ | |
6837 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
6838 | { | |
dee91e82 | 6839 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 6840 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
6841 | complaint (&symfile_complaints, |
6842 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 6843 | else |
b64f50a1 | 6844 | return buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
4bb7a0a7 DJ |
6845 | } |
6846 | ||
6847 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
6848 | form = abbrev->attrs[i].form; | |
6849 | skip_attribute: | |
6850 | switch (form) | |
6851 | { | |
4bb7a0a7 | 6852 | case DW_FORM_ref_addr: |
ae411497 TT |
6853 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
6854 | and later it is offset sized. */ | |
6855 | if (cu->header.version == 2) | |
6856 | info_ptr += cu->header.addr_size; | |
6857 | else | |
6858 | info_ptr += cu->header.offset_size; | |
6859 | break; | |
36586728 TT |
6860 | case DW_FORM_GNU_ref_alt: |
6861 | info_ptr += cu->header.offset_size; | |
6862 | break; | |
ae411497 | 6863 | case DW_FORM_addr: |
4bb7a0a7 DJ |
6864 | info_ptr += cu->header.addr_size; |
6865 | break; | |
6866 | case DW_FORM_data1: | |
6867 | case DW_FORM_ref1: | |
6868 | case DW_FORM_flag: | |
6869 | info_ptr += 1; | |
6870 | break; | |
2dc7f7b3 TT |
6871 | case DW_FORM_flag_present: |
6872 | break; | |
4bb7a0a7 DJ |
6873 | case DW_FORM_data2: |
6874 | case DW_FORM_ref2: | |
6875 | info_ptr += 2; | |
6876 | break; | |
6877 | case DW_FORM_data4: | |
6878 | case DW_FORM_ref4: | |
6879 | info_ptr += 4; | |
6880 | break; | |
6881 | case DW_FORM_data8: | |
6882 | case DW_FORM_ref8: | |
55f1336d | 6883 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
6884 | info_ptr += 8; |
6885 | break; | |
6886 | case DW_FORM_string: | |
9b1c24c8 | 6887 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
6888 | info_ptr += bytes_read; |
6889 | break; | |
2dc7f7b3 | 6890 | case DW_FORM_sec_offset: |
4bb7a0a7 | 6891 | case DW_FORM_strp: |
36586728 | 6892 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
6893 | info_ptr += cu->header.offset_size; |
6894 | break; | |
2dc7f7b3 | 6895 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
6896 | case DW_FORM_block: |
6897 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6898 | info_ptr += bytes_read; | |
6899 | break; | |
6900 | case DW_FORM_block1: | |
6901 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
6902 | break; | |
6903 | case DW_FORM_block2: | |
6904 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
6905 | break; | |
6906 | case DW_FORM_block4: | |
6907 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
6908 | break; | |
6909 | case DW_FORM_sdata: | |
6910 | case DW_FORM_udata: | |
6911 | case DW_FORM_ref_udata: | |
3019eac3 DE |
6912 | case DW_FORM_GNU_addr_index: |
6913 | case DW_FORM_GNU_str_index: | |
d521ce57 | 6914 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
6915 | break; |
6916 | case DW_FORM_indirect: | |
6917 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6918 | info_ptr += bytes_read; | |
6919 | /* We need to continue parsing from here, so just go back to | |
6920 | the top. */ | |
6921 | goto skip_attribute; | |
6922 | ||
6923 | default: | |
3e43a32a MS |
6924 | error (_("Dwarf Error: Cannot handle %s " |
6925 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
6926 | dwarf_form_name (form), |
6927 | bfd_get_filename (abfd)); | |
6928 | } | |
6929 | } | |
6930 | ||
6931 | if (abbrev->has_children) | |
dee91e82 | 6932 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
6933 | else |
6934 | return info_ptr; | |
6935 | } | |
6936 | ||
93311388 | 6937 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 6938 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 6939 | |
d521ce57 | 6940 | static const gdb_byte * |
dee91e82 DE |
6941 | locate_pdi_sibling (const struct die_reader_specs *reader, |
6942 | struct partial_die_info *orig_pdi, | |
d521ce57 | 6943 | const gdb_byte *info_ptr) |
91c24f0a DC |
6944 | { |
6945 | /* Do we know the sibling already? */ | |
72bf9492 | 6946 | |
91c24f0a DC |
6947 | if (orig_pdi->sibling) |
6948 | return orig_pdi->sibling; | |
6949 | ||
6950 | /* Are there any children to deal with? */ | |
6951 | ||
6952 | if (!orig_pdi->has_children) | |
6953 | return info_ptr; | |
6954 | ||
4bb7a0a7 | 6955 | /* Skip the children the long way. */ |
91c24f0a | 6956 | |
dee91e82 | 6957 | return skip_children (reader, info_ptr); |
91c24f0a DC |
6958 | } |
6959 | ||
257e7a09 | 6960 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 6961 | not NULL. */ |
c906108c SS |
6962 | |
6963 | static void | |
257e7a09 YQ |
6964 | dwarf2_read_symtab (struct partial_symtab *self, |
6965 | struct objfile *objfile) | |
c906108c | 6966 | { |
257e7a09 | 6967 | if (self->readin) |
c906108c | 6968 | { |
442e4d9c | 6969 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 6970 | self->filename); |
442e4d9c YQ |
6971 | } |
6972 | else | |
6973 | { | |
6974 | if (info_verbose) | |
c906108c | 6975 | { |
442e4d9c | 6976 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 6977 | self->filename); |
442e4d9c | 6978 | gdb_flush (gdb_stdout); |
c906108c | 6979 | } |
c906108c | 6980 | |
442e4d9c YQ |
6981 | /* Restore our global data. */ |
6982 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10b3939b | 6983 | |
442e4d9c YQ |
6984 | /* If this psymtab is constructed from a debug-only objfile, the |
6985 | has_section_at_zero flag will not necessarily be correct. We | |
6986 | can get the correct value for this flag by looking at the data | |
6987 | associated with the (presumably stripped) associated objfile. */ | |
6988 | if (objfile->separate_debug_objfile_backlink) | |
6989 | { | |
6990 | struct dwarf2_per_objfile *dpo_backlink | |
6991 | = objfile_data (objfile->separate_debug_objfile_backlink, | |
6992 | dwarf2_objfile_data_key); | |
9a619af0 | 6993 | |
442e4d9c YQ |
6994 | dwarf2_per_objfile->has_section_at_zero |
6995 | = dpo_backlink->has_section_at_zero; | |
6996 | } | |
b2ab525c | 6997 | |
442e4d9c | 6998 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 6999 | |
257e7a09 | 7000 | psymtab_to_symtab_1 (self); |
c906108c | 7001 | |
442e4d9c YQ |
7002 | /* Finish up the debug error message. */ |
7003 | if (info_verbose) | |
7004 | printf_filtered (_("done.\n")); | |
c906108c | 7005 | } |
95554aad TT |
7006 | |
7007 | process_cu_includes (); | |
c906108c | 7008 | } |
9cdd5dbd DE |
7009 | \f |
7010 | /* Reading in full CUs. */ | |
c906108c | 7011 | |
10b3939b DJ |
7012 | /* Add PER_CU to the queue. */ |
7013 | ||
7014 | static void | |
95554aad TT |
7015 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7016 | enum language pretend_language) | |
10b3939b DJ |
7017 | { |
7018 | struct dwarf2_queue_item *item; | |
7019 | ||
7020 | per_cu->queued = 1; | |
7021 | item = xmalloc (sizeof (*item)); | |
7022 | item->per_cu = per_cu; | |
95554aad | 7023 | item->pretend_language = pretend_language; |
10b3939b DJ |
7024 | item->next = NULL; |
7025 | ||
7026 | if (dwarf2_queue == NULL) | |
7027 | dwarf2_queue = item; | |
7028 | else | |
7029 | dwarf2_queue_tail->next = item; | |
7030 | ||
7031 | dwarf2_queue_tail = item; | |
7032 | } | |
7033 | ||
89e63ee4 DE |
7034 | /* If PER_CU is not yet queued, add it to the queue. |
7035 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
7036 | dependency. | |
0907af0c | 7037 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
7038 | meaning either PER_CU is already queued or it is already loaded. |
7039 | ||
7040 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
7041 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
7042 | |
7043 | static int | |
89e63ee4 | 7044 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
7045 | struct dwarf2_per_cu_data *per_cu, |
7046 | enum language pretend_language) | |
7047 | { | |
7048 | /* We may arrive here during partial symbol reading, if we need full | |
7049 | DIEs to process an unusual case (e.g. template arguments). Do | |
7050 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
7051 | if (dwarf2_per_objfile->reading_partial_symbols) | |
7052 | { | |
7053 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
7054 | return 1; | |
7055 | return 0; | |
7056 | } | |
7057 | ||
7058 | /* Mark the dependence relation so that we don't flush PER_CU | |
7059 | too early. */ | |
89e63ee4 DE |
7060 | if (dependent_cu != NULL) |
7061 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
7062 | |
7063 | /* If it's already on the queue, we have nothing to do. */ | |
7064 | if (per_cu->queued) | |
7065 | return 0; | |
7066 | ||
7067 | /* If the compilation unit is already loaded, just mark it as | |
7068 | used. */ | |
7069 | if (per_cu->cu != NULL) | |
7070 | { | |
7071 | per_cu->cu->last_used = 0; | |
7072 | return 0; | |
7073 | } | |
7074 | ||
7075 | /* Add it to the queue. */ | |
7076 | queue_comp_unit (per_cu, pretend_language); | |
7077 | ||
7078 | return 1; | |
7079 | } | |
7080 | ||
10b3939b DJ |
7081 | /* Process the queue. */ |
7082 | ||
7083 | static void | |
a0f42c21 | 7084 | process_queue (void) |
10b3939b DJ |
7085 | { |
7086 | struct dwarf2_queue_item *item, *next_item; | |
7087 | ||
45cfd468 DE |
7088 | if (dwarf2_read_debug) |
7089 | { | |
7090 | fprintf_unfiltered (gdb_stdlog, | |
7091 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 7092 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
7093 | } |
7094 | ||
03dd20cc DJ |
7095 | /* The queue starts out with one item, but following a DIE reference |
7096 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
7097 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
7098 | { | |
9291a0cd TT |
7099 | if (dwarf2_per_objfile->using_index |
7100 | ? !item->per_cu->v.quick->symtab | |
7101 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
7102 | { |
7103 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
247f5c4f | 7104 | char buf[100]; |
f4dc4d17 | 7105 | |
247f5c4f | 7106 | if (per_cu->is_debug_types) |
f4dc4d17 | 7107 | { |
247f5c4f DE |
7108 | struct signatured_type *sig_type = |
7109 | (struct signatured_type *) per_cu; | |
7110 | ||
7111 | sprintf (buf, "TU %s at offset 0x%x", | |
7112 | hex_string (sig_type->signature), per_cu->offset.sect_off); | |
f4dc4d17 | 7113 | } |
247f5c4f DE |
7114 | else |
7115 | sprintf (buf, "CU at offset 0x%x", per_cu->offset.sect_off); | |
7116 | ||
7117 | if (dwarf2_read_debug) | |
7118 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); | |
f4dc4d17 DE |
7119 | |
7120 | if (per_cu->is_debug_types) | |
7121 | process_full_type_unit (per_cu, item->pretend_language); | |
7122 | else | |
7123 | process_full_comp_unit (per_cu, item->pretend_language); | |
7124 | ||
7125 | if (dwarf2_read_debug) | |
247f5c4f | 7126 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 7127 | } |
10b3939b DJ |
7128 | |
7129 | item->per_cu->queued = 0; | |
7130 | next_item = item->next; | |
7131 | xfree (item); | |
7132 | } | |
7133 | ||
7134 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
7135 | |
7136 | if (dwarf2_read_debug) | |
7137 | { | |
7138 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 7139 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 7140 | } |
10b3939b DJ |
7141 | } |
7142 | ||
7143 | /* Free all allocated queue entries. This function only releases anything if | |
7144 | an error was thrown; if the queue was processed then it would have been | |
7145 | freed as we went along. */ | |
7146 | ||
7147 | static void | |
7148 | dwarf2_release_queue (void *dummy) | |
7149 | { | |
7150 | struct dwarf2_queue_item *item, *last; | |
7151 | ||
7152 | item = dwarf2_queue; | |
7153 | while (item) | |
7154 | { | |
7155 | /* Anything still marked queued is likely to be in an | |
7156 | inconsistent state, so discard it. */ | |
7157 | if (item->per_cu->queued) | |
7158 | { | |
7159 | if (item->per_cu->cu != NULL) | |
dee91e82 | 7160 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
7161 | item->per_cu->queued = 0; |
7162 | } | |
7163 | ||
7164 | last = item; | |
7165 | item = item->next; | |
7166 | xfree (last); | |
7167 | } | |
7168 | ||
7169 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
7170 | } | |
7171 | ||
7172 | /* Read in full symbols for PST, and anything it depends on. */ | |
7173 | ||
c906108c | 7174 | static void |
fba45db2 | 7175 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 7176 | { |
10b3939b | 7177 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
7178 | int i; |
7179 | ||
95554aad TT |
7180 | if (pst->readin) |
7181 | return; | |
7182 | ||
aaa75496 | 7183 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
7184 | if (!pst->dependencies[i]->readin |
7185 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
7186 | { |
7187 | /* Inform about additional files that need to be read in. */ | |
7188 | if (info_verbose) | |
7189 | { | |
a3f17187 | 7190 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
7191 | fputs_filtered (" ", gdb_stdout); |
7192 | wrap_here (""); | |
7193 | fputs_filtered ("and ", gdb_stdout); | |
7194 | wrap_here (""); | |
7195 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 7196 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
7197 | gdb_flush (gdb_stdout); |
7198 | } | |
7199 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
7200 | } | |
7201 | ||
e38df1d0 | 7202 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
7203 | |
7204 | if (per_cu == NULL) | |
aaa75496 JB |
7205 | { |
7206 | /* It's an include file, no symbols to read for it. | |
7207 | Everything is in the parent symtab. */ | |
7208 | pst->readin = 1; | |
7209 | return; | |
7210 | } | |
c906108c | 7211 | |
a0f42c21 | 7212 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
7213 | } |
7214 | ||
dee91e82 DE |
7215 | /* Trivial hash function for die_info: the hash value of a DIE |
7216 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 7217 | |
dee91e82 DE |
7218 | static hashval_t |
7219 | die_hash (const void *item) | |
10b3939b | 7220 | { |
dee91e82 | 7221 | const struct die_info *die = item; |
6502dd73 | 7222 | |
dee91e82 DE |
7223 | return die->offset.sect_off; |
7224 | } | |
63d06c5c | 7225 | |
dee91e82 DE |
7226 | /* Trivial comparison function for die_info structures: two DIEs |
7227 | are equal if they have the same offset. */ | |
98bfdba5 | 7228 | |
dee91e82 DE |
7229 | static int |
7230 | die_eq (const void *item_lhs, const void *item_rhs) | |
7231 | { | |
7232 | const struct die_info *die_lhs = item_lhs; | |
7233 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 7234 | |
dee91e82 DE |
7235 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
7236 | } | |
c906108c | 7237 | |
dee91e82 DE |
7238 | /* die_reader_func for load_full_comp_unit. |
7239 | This is identical to read_signatured_type_reader, | |
7240 | but is kept separate for now. */ | |
c906108c | 7241 | |
dee91e82 DE |
7242 | static void |
7243 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7244 | const gdb_byte *info_ptr, |
dee91e82 DE |
7245 | struct die_info *comp_unit_die, |
7246 | int has_children, | |
7247 | void *data) | |
7248 | { | |
7249 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 7250 | enum language *language_ptr = data; |
6caca83c | 7251 | |
dee91e82 DE |
7252 | gdb_assert (cu->die_hash == NULL); |
7253 | cu->die_hash = | |
7254 | htab_create_alloc_ex (cu->header.length / 12, | |
7255 | die_hash, | |
7256 | die_eq, | |
7257 | NULL, | |
7258 | &cu->comp_unit_obstack, | |
7259 | hashtab_obstack_allocate, | |
7260 | dummy_obstack_deallocate); | |
e142c38c | 7261 | |
dee91e82 DE |
7262 | if (has_children) |
7263 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
7264 | &info_ptr, comp_unit_die); | |
7265 | cu->dies = comp_unit_die; | |
7266 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
7267 | |
7268 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 7269 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 7270 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
7271 | or we won't be able to build types correctly. |
7272 | Similarly, if we do not read the producer, we can not apply | |
7273 | producer-specific interpretation. */ | |
95554aad | 7274 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 7275 | } |
10b3939b | 7276 | |
dee91e82 | 7277 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 7278 | |
dee91e82 | 7279 | static void |
95554aad TT |
7280 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
7281 | enum language pretend_language) | |
dee91e82 | 7282 | { |
3019eac3 | 7283 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 7284 | |
f4dc4d17 DE |
7285 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
7286 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
7287 | } |
7288 | ||
3da10d80 KS |
7289 | /* Add a DIE to the delayed physname list. */ |
7290 | ||
7291 | static void | |
7292 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
7293 | const char *name, struct die_info *die, | |
7294 | struct dwarf2_cu *cu) | |
7295 | { | |
7296 | struct delayed_method_info mi; | |
7297 | mi.type = type; | |
7298 | mi.fnfield_index = fnfield_index; | |
7299 | mi.index = index; | |
7300 | mi.name = name; | |
7301 | mi.die = die; | |
7302 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
7303 | } | |
7304 | ||
7305 | /* A cleanup for freeing the delayed method list. */ | |
7306 | ||
7307 | static void | |
7308 | free_delayed_list (void *ptr) | |
7309 | { | |
7310 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
7311 | if (cu->method_list != NULL) | |
7312 | { | |
7313 | VEC_free (delayed_method_info, cu->method_list); | |
7314 | cu->method_list = NULL; | |
7315 | } | |
7316 | } | |
7317 | ||
7318 | /* Compute the physnames of any methods on the CU's method list. | |
7319 | ||
7320 | The computation of method physnames is delayed in order to avoid the | |
7321 | (bad) condition that one of the method's formal parameters is of an as yet | |
7322 | incomplete type. */ | |
7323 | ||
7324 | static void | |
7325 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
7326 | { | |
7327 | int i; | |
7328 | struct delayed_method_info *mi; | |
7329 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
7330 | { | |
1d06ead6 | 7331 | const char *physname; |
3da10d80 KS |
7332 | struct fn_fieldlist *fn_flp |
7333 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 7334 | physname = dwarf2_physname (mi->name, mi->die, cu); |
3da10d80 KS |
7335 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
7336 | } | |
7337 | } | |
7338 | ||
a766d390 DE |
7339 | /* Go objects should be embedded in a DW_TAG_module DIE, |
7340 | and it's not clear if/how imported objects will appear. | |
7341 | To keep Go support simple until that's worked out, | |
7342 | go back through what we've read and create something usable. | |
7343 | We could do this while processing each DIE, and feels kinda cleaner, | |
7344 | but that way is more invasive. | |
7345 | This is to, for example, allow the user to type "p var" or "b main" | |
7346 | without having to specify the package name, and allow lookups | |
7347 | of module.object to work in contexts that use the expression | |
7348 | parser. */ | |
7349 | ||
7350 | static void | |
7351 | fixup_go_packaging (struct dwarf2_cu *cu) | |
7352 | { | |
7353 | char *package_name = NULL; | |
7354 | struct pending *list; | |
7355 | int i; | |
7356 | ||
7357 | for (list = global_symbols; list != NULL; list = list->next) | |
7358 | { | |
7359 | for (i = 0; i < list->nsyms; ++i) | |
7360 | { | |
7361 | struct symbol *sym = list->symbol[i]; | |
7362 | ||
7363 | if (SYMBOL_LANGUAGE (sym) == language_go | |
7364 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
7365 | { | |
7366 | char *this_package_name = go_symbol_package_name (sym); | |
7367 | ||
7368 | if (this_package_name == NULL) | |
7369 | continue; | |
7370 | if (package_name == NULL) | |
7371 | package_name = this_package_name; | |
7372 | else | |
7373 | { | |
7374 | if (strcmp (package_name, this_package_name) != 0) | |
7375 | complaint (&symfile_complaints, | |
7376 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 | 7377 | (SYMBOL_SYMTAB (sym) |
05cba821 | 7378 | ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym)) |
4262abfb | 7379 | : objfile_name (cu->objfile)), |
a766d390 DE |
7380 | this_package_name, package_name); |
7381 | xfree (this_package_name); | |
7382 | } | |
7383 | } | |
7384 | } | |
7385 | } | |
7386 | ||
7387 | if (package_name != NULL) | |
7388 | { | |
7389 | struct objfile *objfile = cu->objfile; | |
10f0c4bb TT |
7390 | const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack, |
7391 | package_name, | |
7392 | strlen (package_name)); | |
a766d390 | 7393 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 7394 | saved_package_name, objfile); |
a766d390 DE |
7395 | struct symbol *sym; |
7396 | ||
7397 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
7398 | ||
e623cf5d | 7399 | sym = allocate_symbol (objfile); |
f85f34ed | 7400 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
7401 | SYMBOL_SET_NAMES (sym, saved_package_name, |
7402 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
7403 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
7404 | e.g., "main" finds the "main" module and not C's main(). */ | |
7405 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 7406 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
7407 | SYMBOL_TYPE (sym) = type; |
7408 | ||
7409 | add_symbol_to_list (sym, &global_symbols); | |
7410 | ||
7411 | xfree (package_name); | |
7412 | } | |
7413 | } | |
7414 | ||
95554aad TT |
7415 | /* Return the symtab for PER_CU. This works properly regardless of |
7416 | whether we're using the index or psymtabs. */ | |
7417 | ||
7418 | static struct symtab * | |
7419 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
7420 | { | |
7421 | return (dwarf2_per_objfile->using_index | |
7422 | ? per_cu->v.quick->symtab | |
7423 | : per_cu->v.psymtab->symtab); | |
7424 | } | |
7425 | ||
7426 | /* A helper function for computing the list of all symbol tables | |
7427 | included by PER_CU. */ | |
7428 | ||
7429 | static void | |
ec94af83 DE |
7430 | recursively_compute_inclusions (VEC (symtab_ptr) **result, |
7431 | htab_t all_children, htab_t all_type_symtabs, | |
f9125b6c TT |
7432 | struct dwarf2_per_cu_data *per_cu, |
7433 | struct symtab *immediate_parent) | |
95554aad TT |
7434 | { |
7435 | void **slot; | |
7436 | int ix; | |
ec94af83 | 7437 | struct symtab *symtab; |
95554aad TT |
7438 | struct dwarf2_per_cu_data *iter; |
7439 | ||
7440 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7441 | if (*slot != NULL) | |
7442 | { | |
7443 | /* This inclusion and its children have been processed. */ | |
7444 | return; | |
7445 | } | |
7446 | ||
7447 | *slot = per_cu; | |
7448 | /* Only add a CU if it has a symbol table. */ | |
ec94af83 DE |
7449 | symtab = get_symtab (per_cu); |
7450 | if (symtab != NULL) | |
7451 | { | |
7452 | /* If this is a type unit only add its symbol table if we haven't | |
7453 | seen it yet (type unit per_cu's can share symtabs). */ | |
7454 | if (per_cu->is_debug_types) | |
7455 | { | |
7456 | slot = htab_find_slot (all_type_symtabs, symtab, INSERT); | |
7457 | if (*slot == NULL) | |
7458 | { | |
7459 | *slot = symtab; | |
7460 | VEC_safe_push (symtab_ptr, *result, symtab); | |
f9125b6c TT |
7461 | if (symtab->user == NULL) |
7462 | symtab->user = immediate_parent; | |
ec94af83 DE |
7463 | } |
7464 | } | |
7465 | else | |
f9125b6c TT |
7466 | { |
7467 | VEC_safe_push (symtab_ptr, *result, symtab); | |
7468 | if (symtab->user == NULL) | |
7469 | symtab->user = immediate_parent; | |
7470 | } | |
ec94af83 | 7471 | } |
95554aad TT |
7472 | |
7473 | for (ix = 0; | |
796a7ff8 | 7474 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad | 7475 | ++ix) |
ec94af83 DE |
7476 | { |
7477 | recursively_compute_inclusions (result, all_children, | |
f9125b6c | 7478 | all_type_symtabs, iter, symtab); |
ec94af83 | 7479 | } |
95554aad TT |
7480 | } |
7481 | ||
7482 | /* Compute the symtab 'includes' fields for the symtab related to | |
7483 | PER_CU. */ | |
7484 | ||
7485 | static void | |
7486 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
7487 | { | |
f4dc4d17 DE |
7488 | gdb_assert (! per_cu->is_debug_types); |
7489 | ||
796a7ff8 | 7490 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7491 | { |
7492 | int ix, len; | |
ec94af83 DE |
7493 | struct dwarf2_per_cu_data *per_cu_iter; |
7494 | struct symtab *symtab_iter; | |
7495 | VEC (symtab_ptr) *result_symtabs = NULL; | |
7496 | htab_t all_children, all_type_symtabs; | |
95554aad TT |
7497 | struct symtab *symtab = get_symtab (per_cu); |
7498 | ||
7499 | /* If we don't have a symtab, we can just skip this case. */ | |
7500 | if (symtab == NULL) | |
7501 | return; | |
7502 | ||
7503 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7504 | NULL, xcalloc, xfree); | |
ec94af83 DE |
7505 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
7506 | NULL, xcalloc, xfree); | |
95554aad TT |
7507 | |
7508 | for (ix = 0; | |
796a7ff8 | 7509 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
ec94af83 | 7510 | ix, per_cu_iter); |
95554aad | 7511 | ++ix) |
ec94af83 DE |
7512 | { |
7513 | recursively_compute_inclusions (&result_symtabs, all_children, | |
f9125b6c TT |
7514 | all_type_symtabs, per_cu_iter, |
7515 | symtab); | |
ec94af83 | 7516 | } |
95554aad | 7517 | |
ec94af83 DE |
7518 | /* Now we have a transitive closure of all the included symtabs. */ |
7519 | len = VEC_length (symtab_ptr, result_symtabs); | |
95554aad TT |
7520 | symtab->includes |
7521 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
7522 | (len + 1) * sizeof (struct symtab *)); | |
7523 | for (ix = 0; | |
ec94af83 | 7524 | VEC_iterate (symtab_ptr, result_symtabs, ix, symtab_iter); |
95554aad | 7525 | ++ix) |
ec94af83 | 7526 | symtab->includes[ix] = symtab_iter; |
95554aad TT |
7527 | symtab->includes[len] = NULL; |
7528 | ||
ec94af83 | 7529 | VEC_free (symtab_ptr, result_symtabs); |
95554aad | 7530 | htab_delete (all_children); |
ec94af83 | 7531 | htab_delete (all_type_symtabs); |
95554aad TT |
7532 | } |
7533 | } | |
7534 | ||
7535 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
7536 | read. */ | |
7537 | ||
7538 | static void | |
7539 | process_cu_includes (void) | |
7540 | { | |
7541 | int ix; | |
7542 | struct dwarf2_per_cu_data *iter; | |
7543 | ||
7544 | for (ix = 0; | |
7545 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
7546 | ix, iter); | |
7547 | ++ix) | |
f4dc4d17 DE |
7548 | { |
7549 | if (! iter->is_debug_types) | |
7550 | compute_symtab_includes (iter); | |
7551 | } | |
95554aad TT |
7552 | |
7553 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
7554 | } | |
7555 | ||
9cdd5dbd | 7556 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
7557 | already been loaded into memory. */ |
7558 | ||
7559 | static void | |
95554aad TT |
7560 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7561 | enum language pretend_language) | |
10b3939b | 7562 | { |
10b3939b | 7563 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 7564 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
7565 | CORE_ADDR lowpc, highpc; |
7566 | struct symtab *symtab; | |
3da10d80 | 7567 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 7568 | CORE_ADDR baseaddr; |
4359dff1 | 7569 | struct block *static_block; |
10b3939b DJ |
7570 | |
7571 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7572 | ||
10b3939b DJ |
7573 | buildsym_init (); |
7574 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 7575 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
7576 | |
7577 | cu->list_in_scope = &file_symbols; | |
c906108c | 7578 | |
95554aad TT |
7579 | cu->language = pretend_language; |
7580 | cu->language_defn = language_def (cu->language); | |
7581 | ||
c906108c | 7582 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 7583 | process_die (cu->dies, cu); |
c906108c | 7584 | |
a766d390 DE |
7585 | /* For now fudge the Go package. */ |
7586 | if (cu->language == language_go) | |
7587 | fixup_go_packaging (cu); | |
7588 | ||
3da10d80 KS |
7589 | /* Now that we have processed all the DIEs in the CU, all the types |
7590 | should be complete, and it should now be safe to compute all of the | |
7591 | physnames. */ | |
7592 | compute_delayed_physnames (cu); | |
7593 | do_cleanups (delayed_list_cleanup); | |
7594 | ||
fae299cd DC |
7595 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
7596 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
7597 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 7598 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 7599 | |
36586728 | 7600 | static_block |
ff546935 | 7601 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1); |
4359dff1 JK |
7602 | |
7603 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
7604 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
7605 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
7606 | addrmap to help ensure it has an accurate map of pc values belonging to | |
7607 | this comp unit. */ | |
7608 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
7609 | ||
7610 | symtab = end_symtab_from_static_block (static_block, objfile, | |
7611 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 7612 | |
8be455d7 | 7613 | if (symtab != NULL) |
c906108c | 7614 | { |
df15bd07 | 7615 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 7616 | |
8be455d7 JK |
7617 | /* Set symtab language to language from DW_AT_language. If the |
7618 | compilation is from a C file generated by language preprocessors, do | |
7619 | not set the language if it was already deduced by start_subfile. */ | |
7620 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7621 | symtab->language = cu->language; | |
7622 | ||
7623 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
7624 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
7625 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
7626 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
7627 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
7628 | |
7629 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
7630 | needed, it would be wrong due to missing DW_AT_producer there. | |
7631 | ||
7632 | Still one can confuse GDB by using non-standard GCC compilation | |
7633 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
7634 | */ | |
ab260dad | 7635 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 7636 | symtab->locations_valid = 1; |
e0d00bc7 JK |
7637 | |
7638 | if (gcc_4_minor >= 5) | |
7639 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
7640 | |
7641 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 7642 | } |
9291a0cd TT |
7643 | |
7644 | if (dwarf2_per_objfile->using_index) | |
7645 | per_cu->v.quick->symtab = symtab; | |
7646 | else | |
7647 | { | |
7648 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7649 | pst->symtab = symtab; | |
7650 | pst->readin = 1; | |
7651 | } | |
c906108c | 7652 | |
95554aad TT |
7653 | /* Push it for inclusion processing later. */ |
7654 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
7655 | ||
c906108c | 7656 | do_cleanups (back_to); |
f4dc4d17 | 7657 | } |
45cfd468 | 7658 | |
f4dc4d17 DE |
7659 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
7660 | already been loaded into memory. */ | |
7661 | ||
7662 | static void | |
7663 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
7664 | enum language pretend_language) | |
7665 | { | |
7666 | struct dwarf2_cu *cu = per_cu->cu; | |
7667 | struct objfile *objfile = per_cu->objfile; | |
7668 | struct symtab *symtab; | |
7669 | struct cleanup *back_to, *delayed_list_cleanup; | |
0186c6a7 DE |
7670 | struct signatured_type *sig_type; |
7671 | ||
7672 | gdb_assert (per_cu->is_debug_types); | |
7673 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7674 | |
7675 | buildsym_init (); | |
7676 | back_to = make_cleanup (really_free_pendings, NULL); | |
7677 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
7678 | ||
7679 | cu->list_in_scope = &file_symbols; | |
7680 | ||
7681 | cu->language = pretend_language; | |
7682 | cu->language_defn = language_def (cu->language); | |
7683 | ||
7684 | /* The symbol tables are set up in read_type_unit_scope. */ | |
7685 | process_die (cu->dies, cu); | |
7686 | ||
7687 | /* For now fudge the Go package. */ | |
7688 | if (cu->language == language_go) | |
7689 | fixup_go_packaging (cu); | |
7690 | ||
7691 | /* Now that we have processed all the DIEs in the CU, all the types | |
7692 | should be complete, and it should now be safe to compute all of the | |
7693 | physnames. */ | |
7694 | compute_delayed_physnames (cu); | |
7695 | do_cleanups (delayed_list_cleanup); | |
7696 | ||
7697 | /* TUs share symbol tables. | |
7698 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
7699 | of it with end_expandable_symtab. Otherwise, complete the addition of |
7700 | this TU's symbols to the existing symtab. */ | |
0186c6a7 | 7701 | if (sig_type->type_unit_group->primary_symtab == NULL) |
45cfd468 | 7702 | { |
f4dc4d17 | 7703 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
0186c6a7 | 7704 | sig_type->type_unit_group->primary_symtab = symtab; |
f4dc4d17 DE |
7705 | |
7706 | if (symtab != NULL) | |
7707 | { | |
7708 | /* Set symtab language to language from DW_AT_language. If the | |
7709 | compilation is from a C file generated by language preprocessors, | |
7710 | do not set the language if it was already deduced by | |
7711 | start_subfile. */ | |
7712 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7713 | symtab->language = cu->language; | |
7714 | } | |
7715 | } | |
7716 | else | |
7717 | { | |
7718 | augment_type_symtab (objfile, | |
0186c6a7 DE |
7719 | sig_type->type_unit_group->primary_symtab); |
7720 | symtab = sig_type->type_unit_group->primary_symtab; | |
f4dc4d17 DE |
7721 | } |
7722 | ||
7723 | if (dwarf2_per_objfile->using_index) | |
7724 | per_cu->v.quick->symtab = symtab; | |
7725 | else | |
7726 | { | |
7727 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7728 | pst->symtab = symtab; | |
7729 | pst->readin = 1; | |
45cfd468 | 7730 | } |
f4dc4d17 DE |
7731 | |
7732 | do_cleanups (back_to); | |
c906108c SS |
7733 | } |
7734 | ||
95554aad TT |
7735 | /* Process an imported unit DIE. */ |
7736 | ||
7737 | static void | |
7738 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
7739 | { | |
7740 | struct attribute *attr; | |
7741 | ||
f4dc4d17 DE |
7742 | /* For now we don't handle imported units in type units. */ |
7743 | if (cu->per_cu->is_debug_types) | |
7744 | { | |
7745 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7746 | " supported in type units [in module %s]"), | |
4262abfb | 7747 | objfile_name (cu->objfile)); |
f4dc4d17 DE |
7748 | } |
7749 | ||
95554aad TT |
7750 | attr = dwarf2_attr (die, DW_AT_import, cu); |
7751 | if (attr != NULL) | |
7752 | { | |
7753 | struct dwarf2_per_cu_data *per_cu; | |
7754 | struct symtab *imported_symtab; | |
7755 | sect_offset offset; | |
36586728 | 7756 | int is_dwz; |
95554aad TT |
7757 | |
7758 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
7759 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
7760 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad | 7761 | |
69d751e3 | 7762 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad TT |
7763 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
7764 | load_full_comp_unit (per_cu, cu->language); | |
7765 | ||
796a7ff8 | 7766 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
7767 | per_cu); |
7768 | } | |
7769 | } | |
7770 | ||
c906108c SS |
7771 | /* Process a die and its children. */ |
7772 | ||
7773 | static void | |
e7c27a73 | 7774 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
7775 | { |
7776 | switch (die->tag) | |
7777 | { | |
7778 | case DW_TAG_padding: | |
7779 | break; | |
7780 | case DW_TAG_compile_unit: | |
95554aad | 7781 | case DW_TAG_partial_unit: |
e7c27a73 | 7782 | read_file_scope (die, cu); |
c906108c | 7783 | break; |
348e048f DE |
7784 | case DW_TAG_type_unit: |
7785 | read_type_unit_scope (die, cu); | |
7786 | break; | |
c906108c | 7787 | case DW_TAG_subprogram: |
c906108c | 7788 | case DW_TAG_inlined_subroutine: |
edb3359d | 7789 | read_func_scope (die, cu); |
c906108c SS |
7790 | break; |
7791 | case DW_TAG_lexical_block: | |
14898363 L |
7792 | case DW_TAG_try_block: |
7793 | case DW_TAG_catch_block: | |
e7c27a73 | 7794 | read_lexical_block_scope (die, cu); |
c906108c | 7795 | break; |
96408a79 SA |
7796 | case DW_TAG_GNU_call_site: |
7797 | read_call_site_scope (die, cu); | |
7798 | break; | |
c906108c | 7799 | case DW_TAG_class_type: |
680b30c7 | 7800 | case DW_TAG_interface_type: |
c906108c SS |
7801 | case DW_TAG_structure_type: |
7802 | case DW_TAG_union_type: | |
134d01f1 | 7803 | process_structure_scope (die, cu); |
c906108c SS |
7804 | break; |
7805 | case DW_TAG_enumeration_type: | |
134d01f1 | 7806 | process_enumeration_scope (die, cu); |
c906108c | 7807 | break; |
134d01f1 | 7808 | |
f792889a DJ |
7809 | /* These dies have a type, but processing them does not create |
7810 | a symbol or recurse to process the children. Therefore we can | |
7811 | read them on-demand through read_type_die. */ | |
c906108c | 7812 | case DW_TAG_subroutine_type: |
72019c9c | 7813 | case DW_TAG_set_type: |
c906108c | 7814 | case DW_TAG_array_type: |
c906108c | 7815 | case DW_TAG_pointer_type: |
c906108c | 7816 | case DW_TAG_ptr_to_member_type: |
c906108c | 7817 | case DW_TAG_reference_type: |
c906108c | 7818 | case DW_TAG_string_type: |
c906108c | 7819 | break; |
134d01f1 | 7820 | |
c906108c | 7821 | case DW_TAG_base_type: |
a02abb62 | 7822 | case DW_TAG_subrange_type: |
cb249c71 | 7823 | case DW_TAG_typedef: |
134d01f1 DJ |
7824 | /* Add a typedef symbol for the type definition, if it has a |
7825 | DW_AT_name. */ | |
f792889a | 7826 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 7827 | break; |
c906108c | 7828 | case DW_TAG_common_block: |
e7c27a73 | 7829 | read_common_block (die, cu); |
c906108c SS |
7830 | break; |
7831 | case DW_TAG_common_inclusion: | |
7832 | break; | |
d9fa45fe | 7833 | case DW_TAG_namespace: |
4d4ec4e5 | 7834 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 7835 | read_namespace (die, cu); |
d9fa45fe | 7836 | break; |
5d7cb8df | 7837 | case DW_TAG_module: |
4d4ec4e5 | 7838 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
7839 | read_module (die, cu); |
7840 | break; | |
d9fa45fe DC |
7841 | case DW_TAG_imported_declaration: |
7842 | case DW_TAG_imported_module: | |
4d4ec4e5 | 7843 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
7844 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
7845 | || cu->language != language_fortran)) | |
7846 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
7847 | dwarf_tag_name (die->tag)); | |
7848 | read_import_statement (die, cu); | |
d9fa45fe | 7849 | break; |
95554aad TT |
7850 | |
7851 | case DW_TAG_imported_unit: | |
7852 | process_imported_unit_die (die, cu); | |
7853 | break; | |
7854 | ||
c906108c | 7855 | default: |
e7c27a73 | 7856 | new_symbol (die, NULL, cu); |
c906108c SS |
7857 | break; |
7858 | } | |
7859 | } | |
ca69b9e6 DE |
7860 | \f |
7861 | /* DWARF name computation. */ | |
c906108c | 7862 | |
94af9270 KS |
7863 | /* A helper function for dwarf2_compute_name which determines whether DIE |
7864 | needs to have the name of the scope prepended to the name listed in the | |
7865 | die. */ | |
7866 | ||
7867 | static int | |
7868 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
7869 | { | |
1c809c68 TT |
7870 | struct attribute *attr; |
7871 | ||
94af9270 KS |
7872 | switch (die->tag) |
7873 | { | |
7874 | case DW_TAG_namespace: | |
7875 | case DW_TAG_typedef: | |
7876 | case DW_TAG_class_type: | |
7877 | case DW_TAG_interface_type: | |
7878 | case DW_TAG_structure_type: | |
7879 | case DW_TAG_union_type: | |
7880 | case DW_TAG_enumeration_type: | |
7881 | case DW_TAG_enumerator: | |
7882 | case DW_TAG_subprogram: | |
7883 | case DW_TAG_member: | |
7884 | return 1; | |
7885 | ||
7886 | case DW_TAG_variable: | |
c2b0a229 | 7887 | case DW_TAG_constant: |
94af9270 KS |
7888 | /* We only need to prefix "globally" visible variables. These include |
7889 | any variable marked with DW_AT_external or any variable that | |
7890 | lives in a namespace. [Variables in anonymous namespaces | |
7891 | require prefixing, but they are not DW_AT_external.] */ | |
7892 | ||
7893 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
7894 | { | |
7895 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 7896 | |
94af9270 KS |
7897 | return die_needs_namespace (die_specification (die, &spec_cu), |
7898 | spec_cu); | |
7899 | } | |
7900 | ||
1c809c68 | 7901 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
7902 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
7903 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
7904 | return 0; |
7905 | /* A variable in a lexical block of some kind does not need a | |
7906 | namespace, even though in C++ such variables may be external | |
7907 | and have a mangled name. */ | |
7908 | if (die->parent->tag == DW_TAG_lexical_block | |
7909 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
7910 | || die->parent->tag == DW_TAG_catch_block |
7911 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
7912 | return 0; |
7913 | return 1; | |
94af9270 KS |
7914 | |
7915 | default: | |
7916 | return 0; | |
7917 | } | |
7918 | } | |
7919 | ||
98bfdba5 PA |
7920 | /* Retrieve the last character from a mem_file. */ |
7921 | ||
7922 | static void | |
7923 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
7924 | { | |
7925 | char *last_char_p = (char *) object; | |
7926 | ||
7927 | if (length > 0) | |
7928 | *last_char_p = buffer[length - 1]; | |
7929 | } | |
7930 | ||
94af9270 | 7931 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
7932 | compute the physname for the object, which include a method's: |
7933 | - formal parameters (C++/Java), | |
7934 | - receiver type (Go), | |
7935 | - return type (Java). | |
7936 | ||
7937 | The term "physname" is a bit confusing. | |
7938 | For C++, for example, it is the demangled name. | |
7939 | For Go, for example, it's the mangled name. | |
94af9270 | 7940 | |
af6b7be1 JB |
7941 | For Ada, return the DIE's linkage name rather than the fully qualified |
7942 | name. PHYSNAME is ignored.. | |
7943 | ||
94af9270 KS |
7944 | The result is allocated on the objfile_obstack and canonicalized. */ |
7945 | ||
7946 | static const char * | |
15d034d0 TT |
7947 | dwarf2_compute_name (const char *name, |
7948 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
7949 | int physname) |
7950 | { | |
bb5ed363 DE |
7951 | struct objfile *objfile = cu->objfile; |
7952 | ||
94af9270 KS |
7953 | if (name == NULL) |
7954 | name = dwarf2_name (die, cu); | |
7955 | ||
f55ee35c JK |
7956 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
7957 | compute it by typename_concat inside GDB. */ | |
7958 | if (cu->language == language_ada | |
7959 | || (cu->language == language_fortran && physname)) | |
7960 | { | |
7961 | /* For Ada unit, we prefer the linkage name over the name, as | |
7962 | the former contains the exported name, which the user expects | |
7963 | to be able to reference. Ideally, we want the user to be able | |
7964 | to reference this entity using either natural or linkage name, | |
7965 | but we haven't started looking at this enhancement yet. */ | |
7966 | struct attribute *attr; | |
7967 | ||
7968 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7969 | if (attr == NULL) | |
7970 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7971 | if (attr && DW_STRING (attr)) | |
7972 | return DW_STRING (attr); | |
7973 | } | |
7974 | ||
94af9270 KS |
7975 | /* These are the only languages we know how to qualify names in. */ |
7976 | if (name != NULL | |
f55ee35c JK |
7977 | && (cu->language == language_cplus || cu->language == language_java |
7978 | || cu->language == language_fortran)) | |
94af9270 KS |
7979 | { |
7980 | if (die_needs_namespace (die, cu)) | |
7981 | { | |
7982 | long length; | |
0d5cff50 | 7983 | const char *prefix; |
94af9270 KS |
7984 | struct ui_file *buf; |
7985 | ||
7986 | prefix = determine_prefix (die, cu); | |
7987 | buf = mem_fileopen (); | |
7988 | if (*prefix != '\0') | |
7989 | { | |
f55ee35c JK |
7990 | char *prefixed_name = typename_concat (NULL, prefix, name, |
7991 | physname, cu); | |
9a619af0 | 7992 | |
94af9270 KS |
7993 | fputs_unfiltered (prefixed_name, buf); |
7994 | xfree (prefixed_name); | |
7995 | } | |
7996 | else | |
62d5b8da | 7997 | fputs_unfiltered (name, buf); |
94af9270 | 7998 | |
98bfdba5 PA |
7999 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
8000 | as children with DW_TAG_template_type_param or | |
8001 | DW_TAG_value_type_param. If the latter, add them to the name | |
8002 | here. If the name already has template parameters, then | |
8003 | skip this step; some versions of GCC emit both, and | |
8004 | it is more efficient to use the pre-computed name. | |
8005 | ||
8006 | Something to keep in mind about this process: it is very | |
8007 | unlikely, or in some cases downright impossible, to produce | |
8008 | something that will match the mangled name of a function. | |
8009 | If the definition of the function has the same debug info, | |
8010 | we should be able to match up with it anyway. But fallbacks | |
8011 | using the minimal symbol, for instance to find a method | |
8012 | implemented in a stripped copy of libstdc++, will not work. | |
8013 | If we do not have debug info for the definition, we will have to | |
8014 | match them up some other way. | |
8015 | ||
8016 | When we do name matching there is a related problem with function | |
8017 | templates; two instantiated function templates are allowed to | |
8018 | differ only by their return types, which we do not add here. */ | |
8019 | ||
8020 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
8021 | { | |
8022 | struct attribute *attr; | |
8023 | struct die_info *child; | |
8024 | int first = 1; | |
8025 | ||
8026 | die->building_fullname = 1; | |
8027 | ||
8028 | for (child = die->child; child != NULL; child = child->sibling) | |
8029 | { | |
8030 | struct type *type; | |
12df843f | 8031 | LONGEST value; |
d521ce57 | 8032 | const gdb_byte *bytes; |
98bfdba5 PA |
8033 | struct dwarf2_locexpr_baton *baton; |
8034 | struct value *v; | |
8035 | ||
8036 | if (child->tag != DW_TAG_template_type_param | |
8037 | && child->tag != DW_TAG_template_value_param) | |
8038 | continue; | |
8039 | ||
8040 | if (first) | |
8041 | { | |
8042 | fputs_unfiltered ("<", buf); | |
8043 | first = 0; | |
8044 | } | |
8045 | else | |
8046 | fputs_unfiltered (", ", buf); | |
8047 | ||
8048 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
8049 | if (attr == NULL) | |
8050 | { | |
8051 | complaint (&symfile_complaints, | |
8052 | _("template parameter missing DW_AT_type")); | |
8053 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
8054 | continue; | |
8055 | } | |
8056 | type = die_type (child, cu); | |
8057 | ||
8058 | if (child->tag == DW_TAG_template_type_param) | |
8059 | { | |
79d43c61 | 8060 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
8061 | continue; |
8062 | } | |
8063 | ||
8064 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
8065 | if (attr == NULL) | |
8066 | { | |
8067 | complaint (&symfile_complaints, | |
3e43a32a MS |
8068 | _("template parameter missing " |
8069 | "DW_AT_const_value")); | |
98bfdba5 PA |
8070 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
8071 | continue; | |
8072 | } | |
8073 | ||
8074 | dwarf2_const_value_attr (attr, type, name, | |
8075 | &cu->comp_unit_obstack, cu, | |
8076 | &value, &bytes, &baton); | |
8077 | ||
8078 | if (TYPE_NOSIGN (type)) | |
8079 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
8080 | changed, this can use value_print instead. */ | |
8081 | c_printchar (value, type, buf); | |
8082 | else | |
8083 | { | |
8084 | struct value_print_options opts; | |
8085 | ||
8086 | if (baton != NULL) | |
8087 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
8088 | baton->data, | |
8089 | baton->size, | |
8090 | baton->per_cu); | |
8091 | else if (bytes != NULL) | |
8092 | { | |
8093 | v = allocate_value (type); | |
8094 | memcpy (value_contents_writeable (v), bytes, | |
8095 | TYPE_LENGTH (type)); | |
8096 | } | |
8097 | else | |
8098 | v = value_from_longest (type, value); | |
8099 | ||
3e43a32a MS |
8100 | /* Specify decimal so that we do not depend on |
8101 | the radix. */ | |
98bfdba5 PA |
8102 | get_formatted_print_options (&opts, 'd'); |
8103 | opts.raw = 1; | |
8104 | value_print (v, buf, &opts); | |
8105 | release_value (v); | |
8106 | value_free (v); | |
8107 | } | |
8108 | } | |
8109 | ||
8110 | die->building_fullname = 0; | |
8111 | ||
8112 | if (!first) | |
8113 | { | |
8114 | /* Close the argument list, with a space if necessary | |
8115 | (nested templates). */ | |
8116 | char last_char = '\0'; | |
8117 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
8118 | if (last_char == '>') | |
8119 | fputs_unfiltered (" >", buf); | |
8120 | else | |
8121 | fputs_unfiltered (">", buf); | |
8122 | } | |
8123 | } | |
8124 | ||
94af9270 KS |
8125 | /* For Java and C++ methods, append formal parameter type |
8126 | information, if PHYSNAME. */ | |
6e70227d | 8127 | |
94af9270 KS |
8128 | if (physname && die->tag == DW_TAG_subprogram |
8129 | && (cu->language == language_cplus | |
8130 | || cu->language == language_java)) | |
8131 | { | |
8132 | struct type *type = read_type_die (die, cu); | |
8133 | ||
79d43c61 TT |
8134 | c_type_print_args (type, buf, 1, cu->language, |
8135 | &type_print_raw_options); | |
94af9270 KS |
8136 | |
8137 | if (cu->language == language_java) | |
8138 | { | |
8139 | /* For java, we must append the return type to method | |
0963b4bd | 8140 | names. */ |
94af9270 KS |
8141 | if (die->tag == DW_TAG_subprogram) |
8142 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 8143 | 0, 0, &type_print_raw_options); |
94af9270 KS |
8144 | } |
8145 | else if (cu->language == language_cplus) | |
8146 | { | |
60430eff DJ |
8147 | /* Assume that an artificial first parameter is |
8148 | "this", but do not crash if it is not. RealView | |
8149 | marks unnamed (and thus unused) parameters as | |
8150 | artificial; there is no way to differentiate | |
8151 | the two cases. */ | |
94af9270 KS |
8152 | if (TYPE_NFIELDS (type) > 0 |
8153 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 8154 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
8155 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
8156 | 0)))) | |
94af9270 KS |
8157 | fputs_unfiltered (" const", buf); |
8158 | } | |
8159 | } | |
8160 | ||
bb5ed363 | 8161 | name = ui_file_obsavestring (buf, &objfile->objfile_obstack, |
94af9270 KS |
8162 | &length); |
8163 | ui_file_delete (buf); | |
8164 | ||
8165 | if (cu->language == language_cplus) | |
8166 | { | |
15d034d0 | 8167 | const char *cname |
94af9270 | 8168 | = dwarf2_canonicalize_name (name, cu, |
bb5ed363 | 8169 | &objfile->objfile_obstack); |
9a619af0 | 8170 | |
94af9270 KS |
8171 | if (cname != NULL) |
8172 | name = cname; | |
8173 | } | |
8174 | } | |
8175 | } | |
8176 | ||
8177 | return name; | |
8178 | } | |
8179 | ||
0114d602 DJ |
8180 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
8181 | If scope qualifiers are appropriate they will be added. The result | |
8182 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
94af9270 KS |
8183 | not have a name. NAME may either be from a previous call to |
8184 | dwarf2_name or NULL. | |
8185 | ||
0963b4bd | 8186 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
8187 | |
8188 | static const char * | |
15d034d0 | 8189 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 8190 | { |
94af9270 KS |
8191 | return dwarf2_compute_name (name, die, cu, 0); |
8192 | } | |
0114d602 | 8193 | |
94af9270 KS |
8194 | /* Construct a physname for the given DIE in CU. NAME may either be |
8195 | from a previous call to dwarf2_name or NULL. The result will be | |
8196 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
8197 | name. | |
0114d602 | 8198 | |
94af9270 | 8199 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 8200 | |
94af9270 | 8201 | static const char * |
15d034d0 | 8202 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 8203 | { |
bb5ed363 | 8204 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
8205 | struct attribute *attr; |
8206 | const char *retval, *mangled = NULL, *canon = NULL; | |
8207 | struct cleanup *back_to; | |
8208 | int need_copy = 1; | |
8209 | ||
8210 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
8211 | on its own. */ | |
8212 | if (!die_needs_namespace (die, cu)) | |
8213 | return dwarf2_compute_name (name, die, cu, 1); | |
8214 | ||
8215 | back_to = make_cleanup (null_cleanup, NULL); | |
8216 | ||
8217 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
8218 | if (!attr) | |
8219 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
8220 | ||
8221 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
8222 | has computed. */ | |
8223 | if (attr && DW_STRING (attr)) | |
8224 | { | |
8225 | char *demangled; | |
8226 | ||
8227 | mangled = DW_STRING (attr); | |
8228 | ||
8229 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
8230 | type. It is easier for GDB users to search for such functions as | |
8231 | `name(params)' than `long name(params)'. In such case the minimal | |
8232 | symbol names do not match the full symbol names but for template | |
8233 | functions there is never a need to look up their definition from their | |
8234 | declaration so the only disadvantage remains the minimal symbol | |
8235 | variant `long name(params)' does not have the proper inferior type. | |
8236 | */ | |
8237 | ||
a766d390 DE |
8238 | if (cu->language == language_go) |
8239 | { | |
8240 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
8241 | new_symbol_full assumes we return the mangled name. | |
8242 | This just undoes that lie until things are cleaned up. */ | |
8243 | demangled = NULL; | |
8244 | } | |
8245 | else | |
8246 | { | |
8de20a37 TT |
8247 | demangled = gdb_demangle (mangled, |
8248 | (DMGL_PARAMS | DMGL_ANSI | |
8249 | | (cu->language == language_java | |
8250 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
8251 | : DMGL_RET_DROP))); | |
a766d390 | 8252 | } |
900e11f9 JK |
8253 | if (demangled) |
8254 | { | |
8255 | make_cleanup (xfree, demangled); | |
8256 | canon = demangled; | |
8257 | } | |
8258 | else | |
8259 | { | |
8260 | canon = mangled; | |
8261 | need_copy = 0; | |
8262 | } | |
8263 | } | |
8264 | ||
8265 | if (canon == NULL || check_physname) | |
8266 | { | |
8267 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
8268 | ||
8269 | if (canon != NULL && strcmp (physname, canon) != 0) | |
8270 | { | |
8271 | /* It may not mean a bug in GDB. The compiler could also | |
8272 | compute DW_AT_linkage_name incorrectly. But in such case | |
8273 | GDB would need to be bug-to-bug compatible. */ | |
8274 | ||
8275 | complaint (&symfile_complaints, | |
8276 | _("Computed physname <%s> does not match demangled <%s> " | |
8277 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
4262abfb JK |
8278 | physname, canon, mangled, die->offset.sect_off, |
8279 | objfile_name (objfile)); | |
900e11f9 JK |
8280 | |
8281 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
8282 | is available here - over computed PHYSNAME. It is safer | |
8283 | against both buggy GDB and buggy compilers. */ | |
8284 | ||
8285 | retval = canon; | |
8286 | } | |
8287 | else | |
8288 | { | |
8289 | retval = physname; | |
8290 | need_copy = 0; | |
8291 | } | |
8292 | } | |
8293 | else | |
8294 | retval = canon; | |
8295 | ||
8296 | if (need_copy) | |
10f0c4bb | 8297 | retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval)); |
900e11f9 JK |
8298 | |
8299 | do_cleanups (back_to); | |
8300 | return retval; | |
0114d602 DJ |
8301 | } |
8302 | ||
27aa8d6a SW |
8303 | /* Read the import statement specified by the given die and record it. */ |
8304 | ||
8305 | static void | |
8306 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
8307 | { | |
bb5ed363 | 8308 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 8309 | struct attribute *import_attr; |
32019081 | 8310 | struct die_info *imported_die, *child_die; |
de4affc9 | 8311 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 8312 | const char *imported_name; |
794684b6 | 8313 | const char *imported_name_prefix; |
13387711 SW |
8314 | const char *canonical_name; |
8315 | const char *import_alias; | |
8316 | const char *imported_declaration = NULL; | |
794684b6 | 8317 | const char *import_prefix; |
32019081 JK |
8318 | VEC (const_char_ptr) *excludes = NULL; |
8319 | struct cleanup *cleanups; | |
13387711 | 8320 | |
27aa8d6a SW |
8321 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
8322 | if (import_attr == NULL) | |
8323 | { | |
8324 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8325 | dwarf_tag_name (die->tag)); | |
8326 | return; | |
8327 | } | |
8328 | ||
de4affc9 CC |
8329 | imported_cu = cu; |
8330 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
8331 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
8332 | if (imported_name == NULL) |
8333 | { | |
8334 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
8335 | ||
8336 | The import in the following code: | |
8337 | namespace A | |
8338 | { | |
8339 | typedef int B; | |
8340 | } | |
8341 | ||
8342 | int main () | |
8343 | { | |
8344 | using A::B; | |
8345 | B b; | |
8346 | return b; | |
8347 | } | |
8348 | ||
8349 | ... | |
8350 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
8351 | <52> DW_AT_decl_file : 1 | |
8352 | <53> DW_AT_decl_line : 6 | |
8353 | <54> DW_AT_import : <0x75> | |
8354 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
8355 | <59> DW_AT_name : B | |
8356 | <5b> DW_AT_decl_file : 1 | |
8357 | <5c> DW_AT_decl_line : 2 | |
8358 | <5d> DW_AT_type : <0x6e> | |
8359 | ... | |
8360 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
8361 | <76> DW_AT_byte_size : 4 | |
8362 | <77> DW_AT_encoding : 5 (signed) | |
8363 | ||
8364 | imports the wrong die ( 0x75 instead of 0x58 ). | |
8365 | This case will be ignored until the gcc bug is fixed. */ | |
8366 | return; | |
8367 | } | |
8368 | ||
82856980 SW |
8369 | /* Figure out the local name after import. */ |
8370 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 8371 | |
794684b6 SW |
8372 | /* Figure out where the statement is being imported to. */ |
8373 | import_prefix = determine_prefix (die, cu); | |
8374 | ||
8375 | /* Figure out what the scope of the imported die is and prepend it | |
8376 | to the name of the imported die. */ | |
de4affc9 | 8377 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 8378 | |
f55ee35c JK |
8379 | if (imported_die->tag != DW_TAG_namespace |
8380 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 8381 | { |
13387711 SW |
8382 | imported_declaration = imported_name; |
8383 | canonical_name = imported_name_prefix; | |
794684b6 | 8384 | } |
13387711 | 8385 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 TT |
8386 | canonical_name = obconcat (&objfile->objfile_obstack, |
8387 | imported_name_prefix, "::", imported_name, | |
8388 | (char *) NULL); | |
13387711 SW |
8389 | else |
8390 | canonical_name = imported_name; | |
794684b6 | 8391 | |
32019081 JK |
8392 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
8393 | ||
8394 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
8395 | for (child_die = die->child; child_die && child_die->tag; | |
8396 | child_die = sibling_die (child_die)) | |
8397 | { | |
8398 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
8399 | represented by an imported module entry with an import attribute | |
8400 | referring to the module and owned entries corresponding to those | |
8401 | entities that are renamed as part of being imported. */ | |
8402 | ||
8403 | if (child_die->tag != DW_TAG_imported_declaration) | |
8404 | { | |
8405 | complaint (&symfile_complaints, | |
8406 | _("child DW_TAG_imported_declaration expected " | |
8407 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 8408 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8409 | continue; |
8410 | } | |
8411 | ||
8412 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
8413 | if (import_attr == NULL) | |
8414 | { | |
8415 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
8416 | dwarf_tag_name (child_die->tag)); | |
8417 | continue; | |
8418 | } | |
8419 | ||
8420 | imported_cu = cu; | |
8421 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
8422 | &imported_cu); | |
8423 | imported_name = dwarf2_name (imported_die, imported_cu); | |
8424 | if (imported_name == NULL) | |
8425 | { | |
8426 | complaint (&symfile_complaints, | |
8427 | _("child DW_TAG_imported_declaration has unknown " | |
8428 | "imported name - DIE at 0x%x [in module %s]"), | |
4262abfb | 8429 | child_die->offset.sect_off, objfile_name (objfile)); |
32019081 JK |
8430 | continue; |
8431 | } | |
8432 | ||
8433 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
8434 | ||
8435 | process_die (child_die, cu); | |
8436 | } | |
8437 | ||
c0cc3a76 SW |
8438 | cp_add_using_directive (import_prefix, |
8439 | canonical_name, | |
8440 | import_alias, | |
13387711 | 8441 | imported_declaration, |
32019081 | 8442 | excludes, |
12aaed36 | 8443 | 0, |
bb5ed363 | 8444 | &objfile->objfile_obstack); |
32019081 JK |
8445 | |
8446 | do_cleanups (cleanups); | |
27aa8d6a SW |
8447 | } |
8448 | ||
f4dc4d17 | 8449 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 8450 | |
cb1df416 DJ |
8451 | static void |
8452 | free_cu_line_header (void *arg) | |
8453 | { | |
8454 | struct dwarf2_cu *cu = arg; | |
8455 | ||
8456 | free_line_header (cu->line_header); | |
8457 | cu->line_header = NULL; | |
8458 | } | |
8459 | ||
1b80a9fa JK |
8460 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
8461 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
8462 | this, it was first present in GCC release 4.3.0. */ | |
8463 | ||
8464 | static int | |
8465 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
8466 | { | |
8467 | if (!cu->checked_producer) | |
8468 | check_producer (cu); | |
8469 | ||
8470 | return cu->producer_is_gcc_lt_4_3; | |
8471 | } | |
8472 | ||
9291a0cd TT |
8473 | static void |
8474 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 8475 | const char **name, const char **comp_dir) |
9291a0cd TT |
8476 | { |
8477 | struct attribute *attr; | |
8478 | ||
8479 | *name = NULL; | |
8480 | *comp_dir = NULL; | |
8481 | ||
8482 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
8483 | is not a source language identifier. */ | |
8484 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8485 | if (attr) | |
8486 | { | |
8487 | *name = DW_STRING (attr); | |
8488 | } | |
8489 | ||
8490 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
8491 | if (attr) | |
8492 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
8493 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
8494 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 8495 | { |
15d034d0 TT |
8496 | char *d = ldirname (*name); |
8497 | ||
8498 | *comp_dir = d; | |
8499 | if (d != NULL) | |
8500 | make_cleanup (xfree, d); | |
9291a0cd TT |
8501 | } |
8502 | if (*comp_dir != NULL) | |
8503 | { | |
8504 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
8505 | directory, get rid of it. */ | |
8506 | char *cp = strchr (*comp_dir, ':'); | |
8507 | ||
8508 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
8509 | *comp_dir = cp + 1; | |
8510 | } | |
8511 | ||
8512 | if (*name == NULL) | |
8513 | *name = "<unknown>"; | |
8514 | } | |
8515 | ||
f4dc4d17 DE |
8516 | /* Handle DW_AT_stmt_list for a compilation unit. |
8517 | DIE is the DW_TAG_compile_unit die for CU. | |
f3f5162e DE |
8518 | COMP_DIR is the compilation directory. |
8519 | WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */ | |
2ab95328 TT |
8520 | |
8521 | static void | |
8522 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
b385a60d | 8523 | const char *comp_dir) /* ARI: editCase function */ |
2ab95328 TT |
8524 | { |
8525 | struct attribute *attr; | |
2ab95328 | 8526 | |
f4dc4d17 DE |
8527 | gdb_assert (! cu->per_cu->is_debug_types); |
8528 | ||
2ab95328 TT |
8529 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
8530 | if (attr) | |
8531 | { | |
8532 | unsigned int line_offset = DW_UNSND (attr); | |
8533 | struct line_header *line_header | |
3019eac3 | 8534 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
8535 | |
8536 | if (line_header) | |
dee91e82 DE |
8537 | { |
8538 | cu->line_header = line_header; | |
8539 | make_cleanup (free_cu_line_header, cu); | |
f4dc4d17 | 8540 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1); |
dee91e82 | 8541 | } |
2ab95328 TT |
8542 | } |
8543 | } | |
8544 | ||
95554aad | 8545 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 8546 | |
c906108c | 8547 | static void |
e7c27a73 | 8548 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8549 | { |
dee91e82 | 8550 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 8551 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 8552 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
8553 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
8554 | struct attribute *attr; | |
15d034d0 TT |
8555 | const char *name = NULL; |
8556 | const char *comp_dir = NULL; | |
c906108c SS |
8557 | struct die_info *child_die; |
8558 | bfd *abfd = objfile->obfd; | |
e142c38c | 8559 | CORE_ADDR baseaddr; |
6e70227d | 8560 | |
e142c38c | 8561 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 8562 | |
fae299cd | 8563 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
8564 | |
8565 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
8566 | from finish_block. */ | |
2acceee2 | 8567 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
8568 | lowpc = highpc; |
8569 | lowpc += baseaddr; | |
8570 | highpc += baseaddr; | |
8571 | ||
9291a0cd | 8572 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 8573 | |
95554aad | 8574 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 8575 | |
f4b8a18d KW |
8576 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
8577 | standardised yet. As a workaround for the language detection we fall | |
8578 | back to the DW_AT_producer string. */ | |
8579 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
8580 | cu->language = language_opencl; | |
8581 | ||
3019eac3 DE |
8582 | /* Similar hack for Go. */ |
8583 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
8584 | set_cu_language (DW_LANG_Go, cu); | |
8585 | ||
f4dc4d17 | 8586 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
8587 | |
8588 | /* Decode line number information if present. We do this before | |
8589 | processing child DIEs, so that the line header table is available | |
8590 | for DW_AT_decl_file. */ | |
f4dc4d17 | 8591 | handle_DW_AT_stmt_list (die, cu, comp_dir); |
3019eac3 DE |
8592 | |
8593 | /* Process all dies in compilation unit. */ | |
8594 | if (die->child != NULL) | |
8595 | { | |
8596 | child_die = die->child; | |
8597 | while (child_die && child_die->tag) | |
8598 | { | |
8599 | process_die (child_die, cu); | |
8600 | child_die = sibling_die (child_die); | |
8601 | } | |
8602 | } | |
8603 | ||
8604 | /* Decode macro information, if present. Dwarf 2 macro information | |
8605 | refers to information in the line number info statement program | |
8606 | header, so we can only read it if we've read the header | |
8607 | successfully. */ | |
8608 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
8609 | if (attr && cu->line_header) | |
8610 | { | |
8611 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
8612 | complaint (&symfile_complaints, | |
8613 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
8614 | ||
09262596 | 8615 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
8616 | } |
8617 | else | |
8618 | { | |
8619 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
8620 | if (attr && cu->line_header) | |
8621 | { | |
8622 | unsigned int macro_offset = DW_UNSND (attr); | |
8623 | ||
09262596 | 8624 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
8625 | } |
8626 | } | |
8627 | ||
8628 | do_cleanups (back_to); | |
8629 | } | |
8630 | ||
f4dc4d17 DE |
8631 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
8632 | Create the set of symtabs used by this TU, or if this TU is sharing | |
8633 | symtabs with another TU and the symtabs have already been created | |
8634 | then restore those symtabs in the line header. | |
8635 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
8636 | |
8637 | static void | |
f4dc4d17 | 8638 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 8639 | { |
f4dc4d17 DE |
8640 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8641 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
8642 | struct type_unit_group *tu_group; | |
8643 | int first_time; | |
8644 | struct line_header *lh; | |
3019eac3 | 8645 | struct attribute *attr; |
f4dc4d17 | 8646 | unsigned int i, line_offset; |
0186c6a7 | 8647 | struct signatured_type *sig_type; |
3019eac3 | 8648 | |
f4dc4d17 | 8649 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 8650 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 8651 | |
f4dc4d17 | 8652 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 8653 | |
f4dc4d17 | 8654 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 8655 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
8656 | if (sig_type->type_unit_group == NULL) |
8657 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
8658 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
8659 | |
8660 | /* If we've already processed this stmt_list there's no real need to | |
8661 | do it again, we could fake it and just recreate the part we need | |
8662 | (file name,index -> symtab mapping). If data shows this optimization | |
8663 | is useful we can do it then. */ | |
8664 | first_time = tu_group->primary_symtab == NULL; | |
8665 | ||
8666 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
8667 | debug info. */ | |
8668 | lh = NULL; | |
8669 | if (attr != NULL) | |
3019eac3 | 8670 | { |
f4dc4d17 DE |
8671 | line_offset = DW_UNSND (attr); |
8672 | lh = dwarf_decode_line_header (line_offset, cu); | |
8673 | } | |
8674 | if (lh == NULL) | |
8675 | { | |
8676 | if (first_time) | |
8677 | dwarf2_start_symtab (cu, "", NULL, 0); | |
8678 | else | |
8679 | { | |
8680 | gdb_assert (tu_group->symtabs == NULL); | |
8681 | restart_symtab (0); | |
8682 | } | |
8683 | /* Note: The primary symtab will get allocated at the end. */ | |
8684 | return; | |
3019eac3 DE |
8685 | } |
8686 | ||
f4dc4d17 DE |
8687 | cu->line_header = lh; |
8688 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 8689 | |
f4dc4d17 DE |
8690 | if (first_time) |
8691 | { | |
8692 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 8693 | |
f4dc4d17 DE |
8694 | tu_group->num_symtabs = lh->num_file_names; |
8695 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 8696 | |
f4dc4d17 DE |
8697 | for (i = 0; i < lh->num_file_names; ++i) |
8698 | { | |
d521ce57 | 8699 | const char *dir = NULL; |
f4dc4d17 | 8700 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 8701 | |
f4dc4d17 DE |
8702 | if (fe->dir_index) |
8703 | dir = lh->include_dirs[fe->dir_index - 1]; | |
8704 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 8705 | |
f4dc4d17 DE |
8706 | /* Note: We don't have to watch for the main subfile here, type units |
8707 | don't have DW_AT_name. */ | |
3019eac3 | 8708 | |
f4dc4d17 DE |
8709 | if (current_subfile->symtab == NULL) |
8710 | { | |
8711 | /* NOTE: start_subfile will recognize when it's been passed | |
8712 | a file it has already seen. So we can't assume there's a | |
8713 | simple mapping from lh->file_names to subfiles, | |
8714 | lh->file_names may contain dups. */ | |
8715 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
8716 | objfile); | |
8717 | } | |
8718 | ||
8719 | fe->symtab = current_subfile->symtab; | |
8720 | tu_group->symtabs[i] = fe->symtab; | |
8721 | } | |
8722 | } | |
8723 | else | |
3019eac3 | 8724 | { |
f4dc4d17 DE |
8725 | restart_symtab (0); |
8726 | ||
8727 | for (i = 0; i < lh->num_file_names; ++i) | |
8728 | { | |
8729 | struct file_entry *fe = &lh->file_names[i]; | |
8730 | ||
8731 | fe->symtab = tu_group->symtabs[i]; | |
8732 | } | |
3019eac3 DE |
8733 | } |
8734 | ||
f4dc4d17 DE |
8735 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
8736 | so they don't have a "real" (so to speak) symtab anyway. | |
8737 | There is later code that will assign the main symtab to all symbols | |
8738 | that don't have one. We need to handle the case of a symbol with a | |
8739 | missing symtab (DW_AT_decl_file) anyway. */ | |
8740 | } | |
3019eac3 | 8741 | |
f4dc4d17 DE |
8742 | /* Process DW_TAG_type_unit. |
8743 | For TUs we want to skip the first top level sibling if it's not the | |
8744 | actual type being defined by this TU. In this case the first top | |
8745 | level sibling is there to provide context only. */ | |
3019eac3 | 8746 | |
f4dc4d17 DE |
8747 | static void |
8748 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
8749 | { | |
8750 | struct die_info *child_die; | |
3019eac3 | 8751 | |
f4dc4d17 DE |
8752 | prepare_one_comp_unit (cu, die, language_minimal); |
8753 | ||
8754 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
8755 | We do this before processing child DIEs, so that the line header table | |
8756 | is available for DW_AT_decl_file. */ | |
8757 | setup_type_unit_groups (die, cu); | |
8758 | ||
8759 | if (die->child != NULL) | |
8760 | { | |
8761 | child_die = die->child; | |
8762 | while (child_die && child_die->tag) | |
8763 | { | |
8764 | process_die (child_die, cu); | |
8765 | child_die = sibling_die (child_die); | |
8766 | } | |
8767 | } | |
3019eac3 DE |
8768 | } |
8769 | \f | |
80626a55 DE |
8770 | /* DWO/DWP files. |
8771 | ||
8772 | http://gcc.gnu.org/wiki/DebugFission | |
8773 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
8774 | ||
8775 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
8776 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
8777 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
8778 | |
8779 | static hashval_t | |
8780 | hash_dwo_file (const void *item) | |
8781 | { | |
8782 | const struct dwo_file *dwo_file = item; | |
a2ce51a0 | 8783 | hashval_t hash; |
3019eac3 | 8784 | |
a2ce51a0 DE |
8785 | hash = htab_hash_string (dwo_file->dwo_name); |
8786 | if (dwo_file->comp_dir != NULL) | |
8787 | hash += htab_hash_string (dwo_file->comp_dir); | |
8788 | return hash; | |
3019eac3 DE |
8789 | } |
8790 | ||
8791 | static int | |
8792 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
8793 | { | |
8794 | const struct dwo_file *lhs = item_lhs; | |
8795 | const struct dwo_file *rhs = item_rhs; | |
8796 | ||
a2ce51a0 DE |
8797 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
8798 | return 0; | |
8799 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
8800 | return lhs->comp_dir == rhs->comp_dir; | |
8801 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
8802 | } |
8803 | ||
8804 | /* Allocate a hash table for DWO files. */ | |
8805 | ||
8806 | static htab_t | |
8807 | allocate_dwo_file_hash_table (void) | |
8808 | { | |
8809 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8810 | ||
8811 | return htab_create_alloc_ex (41, | |
8812 | hash_dwo_file, | |
8813 | eq_dwo_file, | |
8814 | NULL, | |
8815 | &objfile->objfile_obstack, | |
8816 | hashtab_obstack_allocate, | |
8817 | dummy_obstack_deallocate); | |
8818 | } | |
8819 | ||
80626a55 DE |
8820 | /* Lookup DWO file DWO_NAME. */ |
8821 | ||
8822 | static void ** | |
0ac5b59e | 8823 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
8824 | { |
8825 | struct dwo_file find_entry; | |
8826 | void **slot; | |
8827 | ||
8828 | if (dwarf2_per_objfile->dwo_files == NULL) | |
8829 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
8830 | ||
8831 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
8832 | find_entry.dwo_name = dwo_name; |
8833 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
8834 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
8835 | ||
8836 | return slot; | |
8837 | } | |
8838 | ||
3019eac3 DE |
8839 | static hashval_t |
8840 | hash_dwo_unit (const void *item) | |
8841 | { | |
8842 | const struct dwo_unit *dwo_unit = item; | |
8843 | ||
8844 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
8845 | return dwo_unit->signature; | |
8846 | } | |
8847 | ||
8848 | static int | |
8849 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
8850 | { | |
8851 | const struct dwo_unit *lhs = item_lhs; | |
8852 | const struct dwo_unit *rhs = item_rhs; | |
8853 | ||
8854 | /* The signature is assumed to be unique within the DWO file. | |
8855 | So while object file CU dwo_id's always have the value zero, | |
8856 | that's OK, assuming each object file DWO file has only one CU, | |
8857 | and that's the rule for now. */ | |
8858 | return lhs->signature == rhs->signature; | |
8859 | } | |
8860 | ||
8861 | /* Allocate a hash table for DWO CUs,TUs. | |
8862 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
8863 | ||
8864 | static htab_t | |
8865 | allocate_dwo_unit_table (struct objfile *objfile) | |
8866 | { | |
8867 | /* Start out with a pretty small number. | |
8868 | Generally DWO files contain only one CU and maybe some TUs. */ | |
8869 | return htab_create_alloc_ex (3, | |
8870 | hash_dwo_unit, | |
8871 | eq_dwo_unit, | |
8872 | NULL, | |
8873 | &objfile->objfile_obstack, | |
8874 | hashtab_obstack_allocate, | |
8875 | dummy_obstack_deallocate); | |
8876 | } | |
8877 | ||
80626a55 | 8878 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 8879 | |
19c3d4c9 | 8880 | struct create_dwo_cu_data |
3019eac3 DE |
8881 | { |
8882 | struct dwo_file *dwo_file; | |
19c3d4c9 | 8883 | struct dwo_unit dwo_unit; |
3019eac3 DE |
8884 | }; |
8885 | ||
19c3d4c9 | 8886 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
8887 | |
8888 | static void | |
19c3d4c9 DE |
8889 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
8890 | const gdb_byte *info_ptr, | |
8891 | struct die_info *comp_unit_die, | |
8892 | int has_children, | |
8893 | void *datap) | |
3019eac3 DE |
8894 | { |
8895 | struct dwarf2_cu *cu = reader->cu; | |
8896 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8897 | sect_offset offset = cu->per_cu->offset; | |
8a0459fd | 8898 | struct dwarf2_section_info *section = cu->per_cu->section; |
19c3d4c9 | 8899 | struct create_dwo_cu_data *data = datap; |
3019eac3 | 8900 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 8901 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 8902 | struct attribute *attr; |
3019eac3 DE |
8903 | |
8904 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
8905 | if (attr == NULL) | |
8906 | { | |
19c3d4c9 DE |
8907 | complaint (&symfile_complaints, |
8908 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
8909 | " its dwo_id [in module %s]"), | |
8910 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
8911 | return; |
8912 | } | |
8913 | ||
3019eac3 DE |
8914 | dwo_unit->dwo_file = dwo_file; |
8915 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 8916 | dwo_unit->section = section; |
3019eac3 DE |
8917 | dwo_unit->offset = offset; |
8918 | dwo_unit->length = cu->per_cu->length; | |
8919 | ||
09406207 | 8920 | if (dwarf2_read_debug) |
4031ecc5 DE |
8921 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
8922 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
8923 | } |
8924 | ||
19c3d4c9 DE |
8925 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
8926 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 8927 | |
19c3d4c9 DE |
8928 | static struct dwo_unit * |
8929 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
8930 | { |
8931 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8932 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
8933 | bfd *abfd; | |
8934 | htab_t cu_htab; | |
d521ce57 | 8935 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
8936 | struct create_dwo_cu_data create_dwo_cu_data; |
8937 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
8938 | |
8939 | dwarf2_read_section (objfile, section); | |
8940 | info_ptr = section->buffer; | |
8941 | ||
8942 | if (info_ptr == NULL) | |
8943 | return NULL; | |
8944 | ||
8945 | /* We can't set abfd until now because the section may be empty or | |
8946 | not present, in which case section->asection will be NULL. */ | |
a32a8923 | 8947 | abfd = get_section_bfd_owner (section); |
3019eac3 | 8948 | |
09406207 | 8949 | if (dwarf2_read_debug) |
19c3d4c9 DE |
8950 | { |
8951 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
a32a8923 DE |
8952 | get_section_name (section), |
8953 | get_section_file_name (section)); | |
19c3d4c9 | 8954 | } |
3019eac3 | 8955 | |
19c3d4c9 DE |
8956 | create_dwo_cu_data.dwo_file = dwo_file; |
8957 | dwo_unit = NULL; | |
3019eac3 DE |
8958 | |
8959 | end_ptr = info_ptr + section->size; | |
8960 | while (info_ptr < end_ptr) | |
8961 | { | |
8962 | struct dwarf2_per_cu_data per_cu; | |
8963 | ||
19c3d4c9 DE |
8964 | memset (&create_dwo_cu_data.dwo_unit, 0, |
8965 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
8966 | memset (&per_cu, 0, sizeof (per_cu)); |
8967 | per_cu.objfile = objfile; | |
8968 | per_cu.is_debug_types = 0; | |
8969 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 8970 | per_cu.section = section; |
3019eac3 DE |
8971 | |
8972 | init_cutu_and_read_dies_no_follow (&per_cu, | |
8973 | &dwo_file->sections.abbrev, | |
8974 | dwo_file, | |
19c3d4c9 DE |
8975 | create_dwo_cu_reader, |
8976 | &create_dwo_cu_data); | |
8977 | ||
8978 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
8979 | { | |
8980 | /* If we've already found one, complain. We only support one | |
8981 | because having more than one requires hacking the dwo_name of | |
8982 | each to match, which is highly unlikely to happen. */ | |
8983 | if (dwo_unit != NULL) | |
8984 | { | |
8985 | complaint (&symfile_complaints, | |
8986 | _("Multiple CUs in DWO file %s [in module %s]"), | |
4262abfb | 8987 | dwo_file->dwo_name, objfile_name (objfile)); |
19c3d4c9 DE |
8988 | break; |
8989 | } | |
8990 | ||
8991 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8992 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
8993 | } | |
3019eac3 DE |
8994 | |
8995 | info_ptr += per_cu.length; | |
8996 | } | |
8997 | ||
19c3d4c9 | 8998 | return dwo_unit; |
3019eac3 DE |
8999 | } |
9000 | ||
80626a55 DE |
9001 | /* DWP file .debug_{cu,tu}_index section format: |
9002 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
9003 | ||
d2415c6c DE |
9004 | DWP Version 1: |
9005 | ||
80626a55 DE |
9006 | Both index sections have the same format, and serve to map a 64-bit |
9007 | signature to a set of section numbers. Each section begins with a header, | |
9008 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
9009 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
9010 | aligned at 8-byte boundaries in the file. | |
9011 | ||
d2415c6c DE |
9012 | The index section header consists of: |
9013 | ||
9014 | V, 32 bit version number | |
9015 | -, 32 bits unused | |
9016 | N, 32 bit number of compilation units or type units in the index | |
9017 | M, 32 bit number of slots in the hash table | |
80626a55 | 9018 | |
d2415c6c | 9019 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 9020 | |
d2415c6c | 9021 | We assume that N and M will not exceed 2^32 - 1. |
80626a55 | 9022 | |
d2415c6c | 9023 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. |
80626a55 | 9024 | |
d2415c6c DE |
9025 | The hash table begins at offset 16 in the section, and consists of an array |
9026 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
9027 | order of the application binary). Unused slots in the hash table are 0. | |
9028 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 9029 | |
d2415c6c DE |
9030 | The parallel table begins immediately after the hash table |
9031 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
9032 | array of 32-bit indexes (using the byte order of the application binary), | |
9033 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
9034 | table contains a 32-bit index into the pool of section numbers. For unused | |
9035 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 9036 | |
d2415c6c DE |
9037 | Given a 64-bit compilation unit signature or a type signature S, an entry |
9038 | in the hash table is located as follows: | |
80626a55 | 9039 | |
d2415c6c DE |
9040 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
9041 | the low-order k bits all set to 1. | |
80626a55 | 9042 | |
d2415c6c | 9043 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 9044 | |
d2415c6c DE |
9045 | 3) If the hash table entry at index H matches the signature, use that |
9046 | entry. If the hash table entry at index H is unused (all zeroes), | |
9047 | terminate the search: the signature is not present in the table. | |
80626a55 | 9048 | |
d2415c6c | 9049 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 9050 | |
d2415c6c DE |
9051 | Because M > N and H' and M are relatively prime, the search is guaranteed |
9052 | to stop at an unused slot or find the match. | |
80626a55 | 9053 | |
d2415c6c DE |
9054 | The pool of section numbers begins immediately following the hash table |
9055 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
9056 | section numbers consists of an array of 32-bit words (using the byte order | |
9057 | of the application binary). Each item in the array is indexed starting | |
9058 | from 0. The hash table entry provides the index of the first section | |
9059 | number in the set. Additional section numbers in the set follow, and the | |
9060 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
80626a55 | 9061 | |
d2415c6c DE |
9062 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo |
9063 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
9064 | be the second entry. Other members of the set may follow in any order. */ | |
80626a55 DE |
9065 | |
9066 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
9067 | .debug_{info,types}.dwo in DWP_FILE. | |
9068 | Returns NULL if there isn't one. | |
9069 | Note: This function processes DWP files only, not DWO files. */ | |
9070 | ||
9071 | static struct dwp_hash_table * | |
9072 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
9073 | { | |
9074 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9075 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 9076 | const gdb_byte *index_ptr, *index_end; |
80626a55 DE |
9077 | struct dwarf2_section_info *index; |
9078 | uint32_t version, nr_units, nr_slots; | |
9079 | struct dwp_hash_table *htab; | |
9080 | ||
9081 | if (is_debug_types) | |
9082 | index = &dwp_file->sections.tu_index; | |
9083 | else | |
9084 | index = &dwp_file->sections.cu_index; | |
9085 | ||
9086 | if (dwarf2_section_empty_p (index)) | |
9087 | return NULL; | |
9088 | dwarf2_read_section (objfile, index); | |
9089 | ||
9090 | index_ptr = index->buffer; | |
9091 | index_end = index_ptr + index->size; | |
9092 | ||
9093 | version = read_4_bytes (dbfd, index_ptr); | |
9094 | index_ptr += 8; /* Skip the unused word. */ | |
9095 | nr_units = read_4_bytes (dbfd, index_ptr); | |
9096 | index_ptr += 4; | |
9097 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
9098 | index_ptr += 4; | |
9099 | ||
9100 | if (version != 1) | |
9101 | { | |
21aa081e | 9102 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 9103 | " [in module %s]"), |
21aa081e | 9104 | pulongest (version), dwp_file->name); |
80626a55 DE |
9105 | } |
9106 | if (nr_slots != (nr_slots & -nr_slots)) | |
9107 | { | |
21aa081e | 9108 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 9109 | " is not power of 2 [in module %s]"), |
21aa081e | 9110 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
9111 | } |
9112 | ||
9113 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
9114 | htab->nr_units = nr_units; | |
9115 | htab->nr_slots = nr_slots; | |
9116 | htab->hash_table = index_ptr; | |
9117 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
9118 | htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
9119 | ||
9120 | return htab; | |
9121 | } | |
9122 | ||
9123 | /* Update SECTIONS with the data from SECTP. | |
9124 | ||
9125 | This function is like the other "locate" section routines that are | |
9126 | passed to bfd_map_over_sections, but in this context the sections to | |
9127 | read comes from the DWP hash table, not the full ELF section table. | |
9128 | ||
9129 | The result is non-zero for success, or zero if an error was found. */ | |
9130 | ||
9131 | static int | |
9132 | locate_virtual_dwo_sections (asection *sectp, | |
9133 | struct virtual_dwo_sections *sections) | |
9134 | { | |
9135 | const struct dwop_section_names *names = &dwop_section_names; | |
9136 | ||
9137 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9138 | { | |
9139 | /* There can be only one. */ | |
9140 | if (sections->abbrev.asection != NULL) | |
9141 | return 0; | |
9142 | sections->abbrev.asection = sectp; | |
9143 | sections->abbrev.size = bfd_get_section_size (sectp); | |
9144 | } | |
9145 | else if (section_is_p (sectp->name, &names->info_dwo) | |
9146 | || section_is_p (sectp->name, &names->types_dwo)) | |
9147 | { | |
9148 | /* There can be only one. */ | |
9149 | if (sections->info_or_types.asection != NULL) | |
9150 | return 0; | |
9151 | sections->info_or_types.asection = sectp; | |
9152 | sections->info_or_types.size = bfd_get_section_size (sectp); | |
9153 | } | |
9154 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9155 | { | |
9156 | /* There can be only one. */ | |
9157 | if (sections->line.asection != NULL) | |
9158 | return 0; | |
9159 | sections->line.asection = sectp; | |
9160 | sections->line.size = bfd_get_section_size (sectp); | |
9161 | } | |
9162 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9163 | { | |
9164 | /* There can be only one. */ | |
9165 | if (sections->loc.asection != NULL) | |
9166 | return 0; | |
9167 | sections->loc.asection = sectp; | |
9168 | sections->loc.size = bfd_get_section_size (sectp); | |
9169 | } | |
9170 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9171 | { | |
9172 | /* There can be only one. */ | |
9173 | if (sections->macinfo.asection != NULL) | |
9174 | return 0; | |
9175 | sections->macinfo.asection = sectp; | |
9176 | sections->macinfo.size = bfd_get_section_size (sectp); | |
9177 | } | |
9178 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9179 | { | |
9180 | /* There can be only one. */ | |
9181 | if (sections->macro.asection != NULL) | |
9182 | return 0; | |
9183 | sections->macro.asection = sectp; | |
9184 | sections->macro.size = bfd_get_section_size (sectp); | |
9185 | } | |
9186 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9187 | { | |
9188 | /* There can be only one. */ | |
9189 | if (sections->str_offsets.asection != NULL) | |
9190 | return 0; | |
9191 | sections->str_offsets.asection = sectp; | |
9192 | sections->str_offsets.size = bfd_get_section_size (sectp); | |
9193 | } | |
9194 | else | |
9195 | { | |
9196 | /* No other kind of section is valid. */ | |
9197 | return 0; | |
9198 | } | |
9199 | ||
9200 | return 1; | |
9201 | } | |
9202 | ||
9203 | /* Create a dwo_unit object for the DWO with signature SIGNATURE. | |
9204 | HTAB is the hash table from the DWP file. | |
0ac5b59e DE |
9205 | SECTION_INDEX is the index of the DWO in HTAB. |
9206 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. */ | |
80626a55 DE |
9207 | |
9208 | static struct dwo_unit * | |
9209 | create_dwo_in_dwp (struct dwp_file *dwp_file, | |
9210 | const struct dwp_hash_table *htab, | |
9211 | uint32_t section_index, | |
0ac5b59e | 9212 | const char *comp_dir, |
80626a55 DE |
9213 | ULONGEST signature, int is_debug_types) |
9214 | { | |
9215 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9216 | bfd *dbfd = dwp_file->dbfd; | |
9217 | const char *kind = is_debug_types ? "TU" : "CU"; | |
9218 | struct dwo_file *dwo_file; | |
9219 | struct dwo_unit *dwo_unit; | |
9220 | struct virtual_dwo_sections sections; | |
9221 | void **dwo_file_slot; | |
9222 | char *virtual_dwo_name; | |
9223 | struct dwarf2_section_info *cutu; | |
9224 | struct cleanup *cleanups; | |
9225 | int i; | |
9226 | ||
9227 | if (dwarf2_read_debug) | |
9228 | { | |
21aa081e | 9229 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP file: %s\n", |
80626a55 | 9230 | kind, |
21aa081e | 9231 | pulongest (section_index), hex_string (signature), |
80626a55 DE |
9232 | dwp_file->name); |
9233 | } | |
9234 | ||
19ac8c2e | 9235 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
9236 | Put a limit on the number of sections we look for so that bad data |
9237 | doesn't cause us to loop forever. */ | |
9238 | ||
9239 | #define MAX_NR_DWO_SECTIONS \ | |
9240 | (1 /* .debug_info or .debug_types */ \ | |
9241 | + 1 /* .debug_abbrev */ \ | |
9242 | + 1 /* .debug_line */ \ | |
9243 | + 1 /* .debug_loc */ \ | |
9244 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 9245 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
9246 | + 1 /* trailing zero */) |
9247 | ||
9248 | memset (§ions, 0, sizeof (sections)); | |
9249 | cleanups = make_cleanup (null_cleanup, 0); | |
9250 | ||
9251 | for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i) | |
9252 | { | |
9253 | asection *sectp; | |
9254 | uint32_t section_nr = | |
9255 | read_4_bytes (dbfd, | |
9256 | htab->section_pool | |
9257 | + (section_index + i) * sizeof (uint32_t)); | |
9258 | ||
9259 | if (section_nr == 0) | |
9260 | break; | |
9261 | if (section_nr >= dwp_file->num_sections) | |
9262 | { | |
9263 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
9264 | " [in module %s]"), | |
9265 | dwp_file->name); | |
9266 | } | |
9267 | ||
9268 | sectp = dwp_file->elf_sections[section_nr]; | |
9269 | if (! locate_virtual_dwo_sections (sectp, §ions)) | |
9270 | { | |
9271 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
9272 | " [in module %s]"), | |
9273 | dwp_file->name); | |
9274 | } | |
9275 | } | |
9276 | ||
9277 | if (i < 2 | |
a32a8923 DE |
9278 | || dwarf2_section_empty_p (§ions.info_or_types) |
9279 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
9280 | { |
9281 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
9282 | " [in module %s]"), | |
9283 | dwp_file->name); | |
9284 | } | |
9285 | if (i == MAX_NR_DWO_SECTIONS) | |
9286 | { | |
9287 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
9288 | " [in module %s]"), | |
9289 | dwp_file->name); | |
9290 | } | |
9291 | ||
9292 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
9293 | have dwo_unit "live" in that. At least for now. | |
9294 | ||
9295 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 9296 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
9297 | file, we can combine them back into a virtual DWO file to save space |
9298 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
9299 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
9300 | ||
2792b94d PM |
9301 | virtual_dwo_name = |
9302 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
a32a8923 DE |
9303 | get_section_id (§ions.abbrev), |
9304 | get_section_id (§ions.line), | |
9305 | get_section_id (§ions.loc), | |
9306 | get_section_id (§ions.str_offsets)); | |
80626a55 DE |
9307 | make_cleanup (xfree, virtual_dwo_name); |
9308 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 9309 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
9310 | /* Create one if necessary. */ |
9311 | if (*dwo_file_slot == NULL) | |
9312 | { | |
9313 | if (dwarf2_read_debug) | |
9314 | { | |
9315 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
9316 | virtual_dwo_name); | |
9317 | } | |
9318 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
9319 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, |
9320 | virtual_dwo_name, | |
9321 | strlen (virtual_dwo_name)); | |
9322 | dwo_file->comp_dir = comp_dir; | |
80626a55 DE |
9323 | dwo_file->sections.abbrev = sections.abbrev; |
9324 | dwo_file->sections.line = sections.line; | |
9325 | dwo_file->sections.loc = sections.loc; | |
9326 | dwo_file->sections.macinfo = sections.macinfo; | |
9327 | dwo_file->sections.macro = sections.macro; | |
9328 | dwo_file->sections.str_offsets = sections.str_offsets; | |
9329 | /* The "str" section is global to the entire DWP file. */ | |
9330 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 9331 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
9332 | there's no need to record it in dwo_file. |
9333 | Also, we can't simply record type sections in dwo_file because | |
9334 | we record a pointer into the vector in dwo_unit. As we collect more | |
9335 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
9336 | for it, invalidating all copies of pointers into the previous |
9337 | contents. */ | |
80626a55 DE |
9338 | *dwo_file_slot = dwo_file; |
9339 | } | |
9340 | else | |
9341 | { | |
9342 | if (dwarf2_read_debug) | |
9343 | { | |
9344 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
9345 | virtual_dwo_name); | |
9346 | } | |
9347 | dwo_file = *dwo_file_slot; | |
9348 | } | |
9349 | do_cleanups (cleanups); | |
9350 | ||
9351 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
9352 | dwo_unit->dwo_file = dwo_file; | |
9353 | dwo_unit->signature = signature; | |
8a0459fd DE |
9354 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, |
9355 | sizeof (struct dwarf2_section_info)); | |
9356 | *dwo_unit->section = sections.info_or_types; | |
57d63ce2 | 9357 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
9358 | |
9359 | return dwo_unit; | |
9360 | } | |
9361 | ||
57d63ce2 DE |
9362 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
9363 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
9364 | |
9365 | static struct dwo_unit * | |
57d63ce2 DE |
9366 | lookup_dwo_unit_in_dwp (struct dwp_file *dwp_file, const char *comp_dir, |
9367 | ULONGEST signature, int is_debug_types) | |
80626a55 | 9368 | { |
57d63ce2 DE |
9369 | const struct dwp_hash_table *dwp_htab = |
9370 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
80626a55 | 9371 | bfd *dbfd = dwp_file->dbfd; |
57d63ce2 | 9372 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
9373 | uint32_t hash = signature & mask; |
9374 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
9375 | unsigned int i; | |
9376 | void **slot; | |
9377 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
9378 | ||
9379 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
9380 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
9381 | slot = htab_find_slot (is_debug_types |
9382 | ? dwp_file->loaded_tus | |
9383 | : dwp_file->loaded_cus, | |
9384 | &find_dwo_cu, INSERT); | |
80626a55 DE |
9385 | |
9386 | if (*slot != NULL) | |
9387 | return *slot; | |
9388 | ||
9389 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 9390 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
9391 | { |
9392 | ULONGEST signature_in_table; | |
9393 | ||
9394 | signature_in_table = | |
57d63ce2 | 9395 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
9396 | if (signature_in_table == signature) |
9397 | { | |
57d63ce2 DE |
9398 | uint32_t unit_index = |
9399 | read_4_bytes (dbfd, | |
9400 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 9401 | |
57d63ce2 | 9402 | *slot = create_dwo_in_dwp (dwp_file, dwp_htab, unit_index, |
0ac5b59e | 9403 | comp_dir, signature, is_debug_types); |
80626a55 DE |
9404 | return *slot; |
9405 | } | |
9406 | if (signature_in_table == 0) | |
9407 | return NULL; | |
9408 | hash = (hash + hash2) & mask; | |
9409 | } | |
9410 | ||
9411 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
9412 | " [in module %s]"), | |
9413 | dwp_file->name); | |
9414 | } | |
9415 | ||
ab5088bf | 9416 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
9417 | Open the file specified by FILE_NAME and hand it off to BFD for |
9418 | preliminary analysis. Return a newly initialized bfd *, which | |
9419 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 9420 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
9421 | SEARCH_CWD is true if the current directory is to be searched. |
9422 | It will be searched before debug-file-directory. | |
9423 | If unable to find/open the file, return NULL. | |
3019eac3 DE |
9424 | NOTE: This function is derived from symfile_bfd_open. */ |
9425 | ||
9426 | static bfd * | |
6ac97d4c | 9427 | try_open_dwop_file (const char *file_name, int is_dwp, int search_cwd) |
3019eac3 DE |
9428 | { |
9429 | bfd *sym_bfd; | |
80626a55 | 9430 | int desc, flags; |
3019eac3 | 9431 | char *absolute_name; |
9c02c129 DE |
9432 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
9433 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
9434 | to debug_file_directory. */ | |
9435 | char *search_path; | |
9436 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; | |
9437 | ||
6ac97d4c DE |
9438 | if (search_cwd) |
9439 | { | |
9440 | if (*debug_file_directory != '\0') | |
9441 | search_path = concat (".", dirname_separator_string, | |
9442 | debug_file_directory, NULL); | |
9443 | else | |
9444 | search_path = xstrdup ("."); | |
9445 | } | |
9c02c129 | 9446 | else |
6ac97d4c | 9447 | search_path = xstrdup (debug_file_directory); |
3019eac3 | 9448 | |
492c0ab7 | 9449 | flags = OPF_RETURN_REALPATH; |
80626a55 DE |
9450 | if (is_dwp) |
9451 | flags |= OPF_SEARCH_IN_PATH; | |
9c02c129 | 9452 | desc = openp (search_path, flags, file_name, |
3019eac3 | 9453 | O_RDONLY | O_BINARY, &absolute_name); |
9c02c129 | 9454 | xfree (search_path); |
3019eac3 DE |
9455 | if (desc < 0) |
9456 | return NULL; | |
9457 | ||
bb397797 | 9458 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
a4453b7e | 9459 | xfree (absolute_name); |
9c02c129 DE |
9460 | if (sym_bfd == NULL) |
9461 | return NULL; | |
3019eac3 DE |
9462 | bfd_set_cacheable (sym_bfd, 1); |
9463 | ||
9464 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
9465 | { | |
cbb099e8 | 9466 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
9467 | return NULL; |
9468 | } | |
9469 | ||
3019eac3 DE |
9470 | return sym_bfd; |
9471 | } | |
9472 | ||
ab5088bf | 9473 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
9474 | COMP_DIR is the DW_AT_comp_dir attribute. |
9475 | The result is the bfd handle of the file. | |
9476 | If there is a problem finding or opening the file, return NULL. | |
9477 | Upon success, the canonicalized path of the file is stored in the bfd, | |
9478 | same as symfile_bfd_open. */ | |
9479 | ||
9480 | static bfd * | |
ab5088bf | 9481 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
9482 | { |
9483 | bfd *abfd; | |
3019eac3 | 9484 | |
80626a55 | 9485 | if (IS_ABSOLUTE_PATH (file_name)) |
6ac97d4c | 9486 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
9487 | |
9488 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
9489 | ||
9490 | if (comp_dir != NULL) | |
9491 | { | |
80626a55 | 9492 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
9493 | |
9494 | /* NOTE: If comp_dir is a relative path, this will also try the | |
9495 | search path, which seems useful. */ | |
6ac97d4c | 9496 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
9497 | xfree (path_to_try); |
9498 | if (abfd != NULL) | |
9499 | return abfd; | |
9500 | } | |
9501 | ||
9502 | /* That didn't work, try debug-file-directory, which, despite its name, | |
9503 | is a list of paths. */ | |
9504 | ||
9505 | if (*debug_file_directory == '\0') | |
9506 | return NULL; | |
9507 | ||
6ac97d4c | 9508 | return try_open_dwop_file (file_name, 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
9509 | } |
9510 | ||
80626a55 DE |
9511 | /* This function is mapped across the sections and remembers the offset and |
9512 | size of each of the DWO debugging sections we are interested in. */ | |
9513 | ||
9514 | static void | |
9515 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
9516 | { | |
9517 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
9518 | const struct dwop_section_names *names = &dwop_section_names; | |
9519 | ||
9520 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9521 | { | |
9522 | dwo_sections->abbrev.asection = sectp; | |
9523 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); | |
9524 | } | |
9525 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
9526 | { | |
9527 | dwo_sections->info.asection = sectp; | |
9528 | dwo_sections->info.size = bfd_get_section_size (sectp); | |
9529 | } | |
9530 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9531 | { | |
9532 | dwo_sections->line.asection = sectp; | |
9533 | dwo_sections->line.size = bfd_get_section_size (sectp); | |
9534 | } | |
9535 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9536 | { | |
9537 | dwo_sections->loc.asection = sectp; | |
9538 | dwo_sections->loc.size = bfd_get_section_size (sectp); | |
9539 | } | |
9540 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9541 | { | |
9542 | dwo_sections->macinfo.asection = sectp; | |
9543 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); | |
9544 | } | |
9545 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9546 | { | |
9547 | dwo_sections->macro.asection = sectp; | |
9548 | dwo_sections->macro.size = bfd_get_section_size (sectp); | |
9549 | } | |
9550 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
9551 | { | |
9552 | dwo_sections->str.asection = sectp; | |
9553 | dwo_sections->str.size = bfd_get_section_size (sectp); | |
9554 | } | |
9555 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9556 | { | |
9557 | dwo_sections->str_offsets.asection = sectp; | |
9558 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); | |
9559 | } | |
9560 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
9561 | { | |
9562 | struct dwarf2_section_info type_section; | |
9563 | ||
9564 | memset (&type_section, 0, sizeof (type_section)); | |
9565 | type_section.asection = sectp; | |
9566 | type_section.size = bfd_get_section_size (sectp); | |
9567 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
9568 | &type_section); | |
9569 | } | |
9570 | } | |
9571 | ||
ab5088bf | 9572 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 9573 | by PER_CU. This is for the non-DWP case. |
80626a55 | 9574 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
9575 | |
9576 | static struct dwo_file * | |
0ac5b59e DE |
9577 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
9578 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
9579 | { |
9580 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9581 | struct dwo_file *dwo_file; |
9582 | bfd *dbfd; | |
3019eac3 DE |
9583 | struct cleanup *cleanups; |
9584 | ||
ab5088bf | 9585 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
9586 | if (dbfd == NULL) |
9587 | { | |
9588 | if (dwarf2_read_debug) | |
9589 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
9590 | return NULL; | |
9591 | } | |
9592 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
9593 | dwo_file->dwo_name = dwo_name; |
9594 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 9595 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
9596 | |
9597 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
9598 | ||
80626a55 | 9599 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 9600 | |
19c3d4c9 | 9601 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
9602 | |
9603 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
9604 | dwo_file->sections.types); | |
9605 | ||
9606 | discard_cleanups (cleanups); | |
9607 | ||
80626a55 DE |
9608 | if (dwarf2_read_debug) |
9609 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
9610 | ||
3019eac3 DE |
9611 | return dwo_file; |
9612 | } | |
9613 | ||
80626a55 DE |
9614 | /* This function is mapped across the sections and remembers the offset and |
9615 | size of each of the DWP debugging sections we are interested in. */ | |
3019eac3 | 9616 | |
80626a55 DE |
9617 | static void |
9618 | dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
3019eac3 | 9619 | { |
80626a55 DE |
9620 | struct dwp_file *dwp_file = dwp_file_ptr; |
9621 | const struct dwop_section_names *names = &dwop_section_names; | |
9622 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 9623 | |
80626a55 DE |
9624 | /* Record the ELF section number for later lookup: this is what the |
9625 | .debug_cu_index,.debug_tu_index tables use. */ | |
9626 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
9627 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 9628 | |
80626a55 DE |
9629 | /* Look for specific sections that we need. */ |
9630 | if (section_is_p (sectp->name, &names->str_dwo)) | |
9631 | { | |
9632 | dwp_file->sections.str.asection = sectp; | |
9633 | dwp_file->sections.str.size = bfd_get_section_size (sectp); | |
9634 | } | |
9635 | else if (section_is_p (sectp->name, &names->cu_index)) | |
9636 | { | |
9637 | dwp_file->sections.cu_index.asection = sectp; | |
9638 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); | |
9639 | } | |
9640 | else if (section_is_p (sectp->name, &names->tu_index)) | |
9641 | { | |
9642 | dwp_file->sections.tu_index.asection = sectp; | |
9643 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); | |
9644 | } | |
9645 | } | |
3019eac3 | 9646 | |
80626a55 | 9647 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9648 | |
80626a55 DE |
9649 | static hashval_t |
9650 | hash_dwp_loaded_cutus (const void *item) | |
9651 | { | |
9652 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 9653 | |
80626a55 DE |
9654 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
9655 | return dwo_unit->signature; | |
3019eac3 DE |
9656 | } |
9657 | ||
80626a55 | 9658 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9659 | |
80626a55 DE |
9660 | static int |
9661 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 9662 | { |
80626a55 DE |
9663 | const struct dwo_unit *dua = a; |
9664 | const struct dwo_unit *dub = b; | |
3019eac3 | 9665 | |
80626a55 DE |
9666 | return dua->signature == dub->signature; |
9667 | } | |
3019eac3 | 9668 | |
80626a55 | 9669 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9670 | |
80626a55 DE |
9671 | static htab_t |
9672 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
9673 | { | |
9674 | return htab_create_alloc_ex (3, | |
9675 | hash_dwp_loaded_cutus, | |
9676 | eq_dwp_loaded_cutus, | |
9677 | NULL, | |
9678 | &objfile->objfile_obstack, | |
9679 | hashtab_obstack_allocate, | |
9680 | dummy_obstack_deallocate); | |
9681 | } | |
3019eac3 | 9682 | |
ab5088bf DE |
9683 | /* Try to open DWP file FILE_NAME. |
9684 | The result is the bfd handle of the file. | |
9685 | If there is a problem finding or opening the file, return NULL. | |
9686 | Upon success, the canonicalized path of the file is stored in the bfd, | |
9687 | same as symfile_bfd_open. */ | |
9688 | ||
9689 | static bfd * | |
9690 | open_dwp_file (const char *file_name) | |
9691 | { | |
6ac97d4c DE |
9692 | bfd *abfd; |
9693 | ||
9694 | abfd = try_open_dwop_file (file_name, 1 /*is_dwp*/, 1 /*search_cwd*/); | |
9695 | if (abfd != NULL) | |
9696 | return abfd; | |
9697 | ||
9698 | /* Work around upstream bug 15652. | |
9699 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
9700 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
9701 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
9702 | of the executable's path may have discarded the needed info. | |
9703 | [IWBN if the dwp file name was recorded in the executable, akin to | |
9704 | .gnu_debuglink, but that doesn't exist yet.] | |
9705 | Strip the directory from FILE_NAME and search again. */ | |
9706 | if (*debug_file_directory != '\0') | |
9707 | { | |
9708 | /* Don't implicitly search the current directory here. | |
9709 | If the user wants to search "." to handle this case, | |
9710 | it must be added to debug-file-directory. */ | |
9711 | return try_open_dwop_file (lbasename (file_name), 1 /*is_dwp*/, | |
9712 | 0 /*search_cwd*/); | |
9713 | } | |
9714 | ||
9715 | return NULL; | |
ab5088bf DE |
9716 | } |
9717 | ||
80626a55 DE |
9718 | /* Initialize the use of the DWP file for the current objfile. |
9719 | By convention the name of the DWP file is ${objfile}.dwp. | |
9720 | The result is NULL if it can't be found. */ | |
a766d390 | 9721 | |
80626a55 | 9722 | static struct dwp_file * |
ab5088bf | 9723 | open_and_init_dwp_file (void) |
80626a55 DE |
9724 | { |
9725 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9726 | struct dwp_file *dwp_file; | |
9727 | char *dwp_name; | |
9728 | bfd *dbfd; | |
9729 | struct cleanup *cleanups; | |
9730 | ||
82bf32bc JK |
9731 | /* Try to find first .dwp for the binary file before any symbolic links |
9732 | resolving. */ | |
9733 | dwp_name = xstrprintf ("%s.dwp", objfile->original_name); | |
80626a55 DE |
9734 | cleanups = make_cleanup (xfree, dwp_name); |
9735 | ||
ab5088bf | 9736 | dbfd = open_dwp_file (dwp_name); |
82bf32bc JK |
9737 | if (dbfd == NULL |
9738 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
9739 | { | |
9740 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
9741 | dwp_name = xstrprintf ("%s.dwp", objfile_name (objfile)); | |
9742 | make_cleanup (xfree, dwp_name); | |
9743 | dbfd = open_dwp_file (dwp_name); | |
9744 | } | |
9745 | ||
80626a55 DE |
9746 | if (dbfd == NULL) |
9747 | { | |
9748 | if (dwarf2_read_debug) | |
9749 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
9750 | do_cleanups (cleanups); | |
9751 | return NULL; | |
3019eac3 | 9752 | } |
80626a55 | 9753 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
93417882 | 9754 | dwp_file->name = bfd_get_filename (dbfd); |
80626a55 DE |
9755 | dwp_file->dbfd = dbfd; |
9756 | do_cleanups (cleanups); | |
c906108c | 9757 | |
80626a55 DE |
9758 | /* +1: section 0 is unused */ |
9759 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
9760 | dwp_file->elf_sections = | |
9761 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
9762 | dwp_file->num_sections, asection *); | |
9763 | ||
9764 | bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file); | |
9765 | ||
9766 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
9767 | ||
9768 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
9769 | ||
19ac8c2e DE |
9770 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
9771 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 9772 | |
80626a55 DE |
9773 | if (dwarf2_read_debug) |
9774 | { | |
9775 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
9776 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
9777 | " %s CUs, %s TUs\n", |
9778 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
9779 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
9780 | } |
9781 | ||
9782 | return dwp_file; | |
3019eac3 | 9783 | } |
c906108c | 9784 | |
ab5088bf DE |
9785 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
9786 | ||
9787 | static struct dwp_file * | |
9788 | get_dwp_file (void) | |
9789 | { | |
9790 | if (! dwarf2_per_objfile->dwp_checked) | |
9791 | { | |
9792 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
9793 | dwarf2_per_objfile->dwp_checked = 1; | |
9794 | } | |
9795 | return dwarf2_per_objfile->dwp_file; | |
9796 | } | |
9797 | ||
80626a55 DE |
9798 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
9799 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
9800 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 9801 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
9802 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
9803 | ||
9804 | This is called, for example, when wanting to read a variable with a | |
9805 | complex location. Therefore we don't want to do file i/o for every call. | |
9806 | Therefore we don't want to look for a DWO file on every call. | |
9807 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
9808 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
9809 | for a DWO file. | |
9810 | ||
1c658ad5 | 9811 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 9812 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 9813 | |
3019eac3 | 9814 | static struct dwo_unit * |
80626a55 DE |
9815 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
9816 | const char *dwo_name, const char *comp_dir, | |
9817 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
9818 | { |
9819 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9820 | const char *kind = is_debug_types ? "TU" : "CU"; |
9821 | void **dwo_file_slot; | |
3019eac3 | 9822 | struct dwo_file *dwo_file; |
80626a55 | 9823 | struct dwp_file *dwp_file; |
cb1df416 | 9824 | |
6a506a2d DE |
9825 | /* First see if there's a DWP file. |
9826 | If we have a DWP file but didn't find the DWO inside it, don't | |
9827 | look for the original DWO file. It makes gdb behave differently | |
9828 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 9829 | |
ab5088bf | 9830 | dwp_file = get_dwp_file (); |
80626a55 | 9831 | if (dwp_file != NULL) |
cf2c3c16 | 9832 | { |
80626a55 DE |
9833 | const struct dwp_hash_table *dwp_htab = |
9834 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
9835 | ||
9836 | if (dwp_htab != NULL) | |
9837 | { | |
9838 | struct dwo_unit *dwo_cutu = | |
57d63ce2 DE |
9839 | lookup_dwo_unit_in_dwp (dwp_file, comp_dir, |
9840 | signature, is_debug_types); | |
80626a55 DE |
9841 | |
9842 | if (dwo_cutu != NULL) | |
9843 | { | |
9844 | if (dwarf2_read_debug) | |
9845 | { | |
9846 | fprintf_unfiltered (gdb_stdlog, | |
9847 | "Virtual DWO %s %s found: @%s\n", | |
9848 | kind, hex_string (signature), | |
9849 | host_address_to_string (dwo_cutu)); | |
9850 | } | |
9851 | return dwo_cutu; | |
9852 | } | |
9853 | } | |
9854 | } | |
6a506a2d | 9855 | else |
80626a55 | 9856 | { |
6a506a2d | 9857 | /* No DWP file, look for the DWO file. */ |
80626a55 | 9858 | |
6a506a2d DE |
9859 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
9860 | if (*dwo_file_slot == NULL) | |
80626a55 | 9861 | { |
6a506a2d DE |
9862 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
9863 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 9864 | } |
6a506a2d DE |
9865 | /* NOTE: This will be NULL if unable to open the file. */ |
9866 | dwo_file = *dwo_file_slot; | |
3019eac3 | 9867 | |
6a506a2d | 9868 | if (dwo_file != NULL) |
19c3d4c9 | 9869 | { |
6a506a2d DE |
9870 | struct dwo_unit *dwo_cutu = NULL; |
9871 | ||
9872 | if (is_debug_types && dwo_file->tus) | |
9873 | { | |
9874 | struct dwo_unit find_dwo_cutu; | |
9875 | ||
9876 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
9877 | find_dwo_cutu.signature = signature; | |
9878 | dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu); | |
9879 | } | |
9880 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 9881 | { |
6a506a2d DE |
9882 | if (signature == dwo_file->cu->signature) |
9883 | dwo_cutu = dwo_file->cu; | |
9884 | } | |
9885 | ||
9886 | if (dwo_cutu != NULL) | |
9887 | { | |
9888 | if (dwarf2_read_debug) | |
9889 | { | |
9890 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
9891 | kind, dwo_name, hex_string (signature), | |
9892 | host_address_to_string (dwo_cutu)); | |
9893 | } | |
9894 | return dwo_cutu; | |
80626a55 DE |
9895 | } |
9896 | } | |
2e276125 | 9897 | } |
9cdd5dbd | 9898 | |
80626a55 DE |
9899 | /* We didn't find it. This could mean a dwo_id mismatch, or |
9900 | someone deleted the DWO/DWP file, or the search path isn't set up | |
9901 | correctly to find the file. */ | |
9902 | ||
9903 | if (dwarf2_read_debug) | |
9904 | { | |
9905 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
9906 | kind, dwo_name, hex_string (signature)); | |
9907 | } | |
3019eac3 | 9908 | |
6656a72d DE |
9909 | /* This is a warning and not a complaint because it can be caused by |
9910 | pilot error (e.g., user accidentally deleting the DWO). */ | |
9911 | warning (_("Could not find DWO %s %s(%s) referenced by %s at offset 0x%x" | |
9912 | " [in module %s]"), | |
9913 | kind, dwo_name, hex_string (signature), | |
9914 | this_unit->is_debug_types ? "TU" : "CU", | |
4262abfb | 9915 | this_unit->offset.sect_off, objfile_name (objfile)); |
3019eac3 | 9916 | return NULL; |
5fb290d7 DJ |
9917 | } |
9918 | ||
80626a55 DE |
9919 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
9920 | See lookup_dwo_cutu_unit for details. */ | |
9921 | ||
9922 | static struct dwo_unit * | |
9923 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
9924 | const char *dwo_name, const char *comp_dir, | |
9925 | ULONGEST signature) | |
9926 | { | |
9927 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
9928 | } | |
9929 | ||
9930 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
9931 | See lookup_dwo_cutu_unit for details. */ | |
9932 | ||
9933 | static struct dwo_unit * | |
9934 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
9935 | const char *dwo_name, const char *comp_dir) | |
9936 | { | |
9937 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
9938 | } | |
9939 | ||
89e63ee4 DE |
9940 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
9941 | ||
9942 | static int | |
9943 | queue_and_load_dwo_tu (void **slot, void *info) | |
9944 | { | |
9945 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
9946 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
9947 | ULONGEST signature = dwo_unit->signature; | |
9948 | struct signatured_type *sig_type = | |
9949 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
9950 | ||
9951 | if (sig_type != NULL) | |
9952 | { | |
9953 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
9954 | ||
9955 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
9956 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
9957 | while processing PER_CU. */ | |
9958 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
9959 | load_full_type_unit (sig_cu); | |
9960 | VEC_safe_push (dwarf2_per_cu_ptr, per_cu->imported_symtabs, sig_cu); | |
9961 | } | |
9962 | ||
9963 | return 1; | |
9964 | } | |
9965 | ||
9966 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
9967 | The DWO may have the only definition of the type, though it may not be | |
9968 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
9969 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
9970 | ||
9971 | static void | |
9972 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
9973 | { | |
9974 | struct dwo_unit *dwo_unit; | |
9975 | struct dwo_file *dwo_file; | |
9976 | ||
9977 | gdb_assert (!per_cu->is_debug_types); | |
9978 | gdb_assert (get_dwp_file () == NULL); | |
9979 | gdb_assert (per_cu->cu != NULL); | |
9980 | ||
9981 | dwo_unit = per_cu->cu->dwo_unit; | |
9982 | gdb_assert (dwo_unit != NULL); | |
9983 | ||
9984 | dwo_file = dwo_unit->dwo_file; | |
9985 | if (dwo_file->tus != NULL) | |
9986 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
9987 | } | |
9988 | ||
3019eac3 DE |
9989 | /* Free all resources associated with DWO_FILE. |
9990 | Close the DWO file and munmap the sections. | |
9991 | All memory should be on the objfile obstack. */ | |
348e048f DE |
9992 | |
9993 | static void | |
3019eac3 | 9994 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 9995 | { |
3019eac3 DE |
9996 | int ix; |
9997 | struct dwarf2_section_info *section; | |
348e048f | 9998 | |
5c6fa7ab | 9999 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 10000 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 10001 | |
3019eac3 DE |
10002 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
10003 | } | |
348e048f | 10004 | |
3019eac3 | 10005 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 10006 | |
3019eac3 DE |
10007 | static void |
10008 | free_dwo_file_cleanup (void *arg) | |
10009 | { | |
10010 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
10011 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 10012 | |
3019eac3 DE |
10013 | free_dwo_file (dwo_file, objfile); |
10014 | } | |
348e048f | 10015 | |
3019eac3 | 10016 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 10017 | |
3019eac3 DE |
10018 | static int |
10019 | free_dwo_file_from_slot (void **slot, void *info) | |
10020 | { | |
10021 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
10022 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 10023 | |
3019eac3 | 10024 | free_dwo_file (dwo_file, objfile); |
348e048f | 10025 | |
3019eac3 DE |
10026 | return 1; |
10027 | } | |
348e048f | 10028 | |
3019eac3 | 10029 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 10030 | |
3019eac3 DE |
10031 | static void |
10032 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
10033 | { | |
10034 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 10035 | } |
3019eac3 DE |
10036 | \f |
10037 | /* Read in various DIEs. */ | |
348e048f | 10038 | |
d389af10 JK |
10039 | /* qsort helper for inherit_abstract_dies. */ |
10040 | ||
10041 | static int | |
10042 | unsigned_int_compar (const void *ap, const void *bp) | |
10043 | { | |
10044 | unsigned int a = *(unsigned int *) ap; | |
10045 | unsigned int b = *(unsigned int *) bp; | |
10046 | ||
10047 | return (a > b) - (b > a); | |
10048 | } | |
10049 | ||
10050 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
10051 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
10052 | already referenced by DW_AT_abstract_origin from the children of the | |
10053 | current DIE. */ | |
d389af10 JK |
10054 | |
10055 | static void | |
10056 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
10057 | { | |
10058 | struct die_info *child_die; | |
10059 | unsigned die_children_count; | |
10060 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
10061 | sect_offset *offsets; |
10062 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
10063 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
10064 | struct die_info *origin_die; | |
10065 | /* Iterator of the ORIGIN_DIE children. */ | |
10066 | struct die_info *origin_child_die; | |
10067 | struct cleanup *cleanups; | |
10068 | struct attribute *attr; | |
cd02d79d PA |
10069 | struct dwarf2_cu *origin_cu; |
10070 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
10071 | |
10072 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
10073 | if (!attr) | |
10074 | return; | |
10075 | ||
cd02d79d PA |
10076 | /* Note that following die references may follow to a die in a |
10077 | different cu. */ | |
10078 | ||
10079 | origin_cu = cu; | |
10080 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
10081 | ||
10082 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
10083 | symbols in. */ | |
10084 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
10085 | origin_cu->list_in_scope = cu->list_in_scope; | |
10086 | ||
edb3359d DJ |
10087 | if (die->tag != origin_die->tag |
10088 | && !(die->tag == DW_TAG_inlined_subroutine | |
10089 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
10090 | complaint (&symfile_complaints, |
10091 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 10092 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
10093 | |
10094 | child_die = die->child; | |
10095 | die_children_count = 0; | |
10096 | while (child_die && child_die->tag) | |
10097 | { | |
10098 | child_die = sibling_die (child_die); | |
10099 | die_children_count++; | |
10100 | } | |
10101 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
10102 | cleanups = make_cleanup (xfree, offsets); | |
10103 | ||
10104 | offsets_end = offsets; | |
10105 | child_die = die->child; | |
10106 | while (child_die && child_die->tag) | |
10107 | { | |
c38f313d DJ |
10108 | /* For each CHILD_DIE, find the corresponding child of |
10109 | ORIGIN_DIE. If there is more than one layer of | |
10110 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
10111 | but GCC versions at least through 4.4 generate this (GCC PR | |
10112 | 40573). */ | |
10113 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 10114 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 10115 | |
c38f313d DJ |
10116 | while (1) |
10117 | { | |
cd02d79d PA |
10118 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
10119 | child_origin_cu); | |
c38f313d DJ |
10120 | if (attr == NULL) |
10121 | break; | |
cd02d79d PA |
10122 | child_origin_die = follow_die_ref (child_origin_die, attr, |
10123 | &child_origin_cu); | |
c38f313d DJ |
10124 | } |
10125 | ||
d389af10 JK |
10126 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
10127 | counterpart may exist. */ | |
c38f313d | 10128 | if (child_origin_die != child_die) |
d389af10 | 10129 | { |
edb3359d DJ |
10130 | if (child_die->tag != child_origin_die->tag |
10131 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
10132 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
10133 | complaint (&symfile_complaints, |
10134 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
10135 | "different tags"), child_die->offset.sect_off, |
10136 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
10137 | if (child_origin_die->parent != origin_die) |
10138 | complaint (&symfile_complaints, | |
10139 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
10140 | "different parents"), child_die->offset.sect_off, |
10141 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
10142 | else |
10143 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
10144 | } |
10145 | child_die = sibling_die (child_die); | |
10146 | } | |
10147 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
10148 | unsigned_int_compar); | |
10149 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 10150 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
10151 | complaint (&symfile_complaints, |
10152 | _("Multiple children of DIE 0x%x refer " | |
10153 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 10154 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
10155 | |
10156 | offsetp = offsets; | |
10157 | origin_child_die = origin_die->child; | |
10158 | while (origin_child_die && origin_child_die->tag) | |
10159 | { | |
10160 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
10161 | while (offsetp < offsets_end |
10162 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 10163 | offsetp++; |
b64f50a1 JK |
10164 | if (offsetp >= offsets_end |
10165 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 JK |
10166 | { |
10167 | /* Found that ORIGIN_CHILD_DIE is really not referenced. */ | |
cd02d79d | 10168 | process_die (origin_child_die, origin_cu); |
d389af10 JK |
10169 | } |
10170 | origin_child_die = sibling_die (origin_child_die); | |
10171 | } | |
cd02d79d | 10172 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
10173 | |
10174 | do_cleanups (cleanups); | |
10175 | } | |
10176 | ||
c906108c | 10177 | static void |
e7c27a73 | 10178 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10179 | { |
e7c27a73 | 10180 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 10181 | struct context_stack *new; |
c906108c SS |
10182 | CORE_ADDR lowpc; |
10183 | CORE_ADDR highpc; | |
10184 | struct die_info *child_die; | |
edb3359d | 10185 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 10186 | const char *name; |
e142c38c | 10187 | CORE_ADDR baseaddr; |
801e3a5b | 10188 | struct block *block; |
edb3359d | 10189 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
10190 | VEC (symbolp) *template_args = NULL; |
10191 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
10192 | |
10193 | if (inlined_func) | |
10194 | { | |
10195 | /* If we do not have call site information, we can't show the | |
10196 | caller of this inlined function. That's too confusing, so | |
10197 | only use the scope for local variables. */ | |
10198 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
10199 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
10200 | if (call_line == NULL || call_file == NULL) | |
10201 | { | |
10202 | read_lexical_block_scope (die, cu); | |
10203 | return; | |
10204 | } | |
10205 | } | |
c906108c | 10206 | |
e142c38c DJ |
10207 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
10208 | ||
94af9270 | 10209 | name = dwarf2_name (die, cu); |
c906108c | 10210 | |
e8d05480 JB |
10211 | /* Ignore functions with missing or empty names. These are actually |
10212 | illegal according to the DWARF standard. */ | |
10213 | if (name == NULL) | |
10214 | { | |
10215 | complaint (&symfile_complaints, | |
b64f50a1 JK |
10216 | _("missing name for subprogram DIE at %d"), |
10217 | die->offset.sect_off); | |
e8d05480 JB |
10218 | return; |
10219 | } | |
10220 | ||
10221 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
10222 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
10223 | { | |
ae4d0c03 PM |
10224 | attr = dwarf2_attr (die, DW_AT_external, cu); |
10225 | if (!attr || !DW_UNSND (attr)) | |
10226 | complaint (&symfile_complaints, | |
3e43a32a MS |
10227 | _("cannot get low and high bounds " |
10228 | "for subprogram DIE at %d"), | |
b64f50a1 | 10229 | die->offset.sect_off); |
e8d05480 JB |
10230 | return; |
10231 | } | |
c906108c SS |
10232 | |
10233 | lowpc += baseaddr; | |
10234 | highpc += baseaddr; | |
10235 | ||
34eaf542 TT |
10236 | /* If we have any template arguments, then we must allocate a |
10237 | different sort of symbol. */ | |
10238 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
10239 | { | |
10240 | if (child_die->tag == DW_TAG_template_type_param | |
10241 | || child_die->tag == DW_TAG_template_value_param) | |
10242 | { | |
e623cf5d | 10243 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
10244 | templ_func->base.is_cplus_template_function = 1; |
10245 | break; | |
10246 | } | |
10247 | } | |
10248 | ||
c906108c | 10249 | new = push_context (0, lowpc); |
34eaf542 TT |
10250 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
10251 | (struct symbol *) templ_func); | |
4c2df51b | 10252 | |
4cecd739 DJ |
10253 | /* If there is a location expression for DW_AT_frame_base, record |
10254 | it. */ | |
e142c38c | 10255 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 10256 | if (attr) |
f1e6e072 | 10257 | dwarf2_symbol_mark_computed (attr, new->name, cu, 1); |
4c2df51b | 10258 | |
e142c38c | 10259 | cu->list_in_scope = &local_symbols; |
c906108c | 10260 | |
639d11d3 | 10261 | if (die->child != NULL) |
c906108c | 10262 | { |
639d11d3 | 10263 | child_die = die->child; |
c906108c SS |
10264 | while (child_die && child_die->tag) |
10265 | { | |
34eaf542 TT |
10266 | if (child_die->tag == DW_TAG_template_type_param |
10267 | || child_die->tag == DW_TAG_template_value_param) | |
10268 | { | |
10269 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
10270 | ||
f1078f66 DJ |
10271 | if (arg != NULL) |
10272 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
10273 | } |
10274 | else | |
10275 | process_die (child_die, cu); | |
c906108c SS |
10276 | child_die = sibling_die (child_die); |
10277 | } | |
10278 | } | |
10279 | ||
d389af10 JK |
10280 | inherit_abstract_dies (die, cu); |
10281 | ||
4a811a97 UW |
10282 | /* If we have a DW_AT_specification, we might need to import using |
10283 | directives from the context of the specification DIE. See the | |
10284 | comment in determine_prefix. */ | |
10285 | if (cu->language == language_cplus | |
10286 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
10287 | { | |
10288 | struct dwarf2_cu *spec_cu = cu; | |
10289 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
10290 | ||
10291 | while (spec_die) | |
10292 | { | |
10293 | child_die = spec_die->child; | |
10294 | while (child_die && child_die->tag) | |
10295 | { | |
10296 | if (child_die->tag == DW_TAG_imported_module) | |
10297 | process_die (child_die, spec_cu); | |
10298 | child_die = sibling_die (child_die); | |
10299 | } | |
10300 | ||
10301 | /* In some cases, GCC generates specification DIEs that | |
10302 | themselves contain DW_AT_specification attributes. */ | |
10303 | spec_die = die_specification (spec_die, &spec_cu); | |
10304 | } | |
10305 | } | |
10306 | ||
c906108c SS |
10307 | new = pop_context (); |
10308 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
10309 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
10310 | lowpc, highpc, objfile); | |
10311 | ||
df8a16a1 | 10312 | /* For C++, set the block's scope. */ |
195a3f6c | 10313 | if ((cu->language == language_cplus || cu->language == language_fortran) |
4d4ec4e5 | 10314 | && cu->processing_has_namespace_info) |
195a3f6c TT |
10315 | block_set_scope (block, determine_prefix (die, cu), |
10316 | &objfile->objfile_obstack); | |
df8a16a1 | 10317 | |
801e3a5b JB |
10318 | /* If we have address ranges, record them. */ |
10319 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 10320 | |
34eaf542 TT |
10321 | /* Attach template arguments to function. */ |
10322 | if (! VEC_empty (symbolp, template_args)) | |
10323 | { | |
10324 | gdb_assert (templ_func != NULL); | |
10325 | ||
10326 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
10327 | templ_func->template_arguments | |
10328 | = obstack_alloc (&objfile->objfile_obstack, | |
10329 | (templ_func->n_template_arguments | |
10330 | * sizeof (struct symbol *))); | |
10331 | memcpy (templ_func->template_arguments, | |
10332 | VEC_address (symbolp, template_args), | |
10333 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
10334 | VEC_free (symbolp, template_args); | |
10335 | } | |
10336 | ||
208d8187 JB |
10337 | /* In C++, we can have functions nested inside functions (e.g., when |
10338 | a function declares a class that has methods). This means that | |
10339 | when we finish processing a function scope, we may need to go | |
10340 | back to building a containing block's symbol lists. */ | |
10341 | local_symbols = new->locals; | |
27aa8d6a | 10342 | using_directives = new->using_directives; |
208d8187 | 10343 | |
921e78cf JB |
10344 | /* If we've finished processing a top-level function, subsequent |
10345 | symbols go in the file symbol list. */ | |
10346 | if (outermost_context_p ()) | |
e142c38c | 10347 | cu->list_in_scope = &file_symbols; |
c906108c SS |
10348 | } |
10349 | ||
10350 | /* Process all the DIES contained within a lexical block scope. Start | |
10351 | a new scope, process the dies, and then close the scope. */ | |
10352 | ||
10353 | static void | |
e7c27a73 | 10354 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10355 | { |
e7c27a73 | 10356 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 10357 | struct context_stack *new; |
c906108c SS |
10358 | CORE_ADDR lowpc, highpc; |
10359 | struct die_info *child_die; | |
e142c38c DJ |
10360 | CORE_ADDR baseaddr; |
10361 | ||
10362 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
10363 | |
10364 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
10365 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
10366 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 10367 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 10368 | describe ranges. */ |
d85a05f0 | 10369 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
10370 | return; |
10371 | lowpc += baseaddr; | |
10372 | highpc += baseaddr; | |
10373 | ||
10374 | push_context (0, lowpc); | |
639d11d3 | 10375 | if (die->child != NULL) |
c906108c | 10376 | { |
639d11d3 | 10377 | child_die = die->child; |
c906108c SS |
10378 | while (child_die && child_die->tag) |
10379 | { | |
e7c27a73 | 10380 | process_die (child_die, cu); |
c906108c SS |
10381 | child_die = sibling_die (child_die); |
10382 | } | |
10383 | } | |
10384 | new = pop_context (); | |
10385 | ||
8540c487 | 10386 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 10387 | { |
801e3a5b JB |
10388 | struct block *block |
10389 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
10390 | highpc, objfile); | |
10391 | ||
10392 | /* Note that recording ranges after traversing children, as we | |
10393 | do here, means that recording a parent's ranges entails | |
10394 | walking across all its children's ranges as they appear in | |
10395 | the address map, which is quadratic behavior. | |
10396 | ||
10397 | It would be nicer to record the parent's ranges before | |
10398 | traversing its children, simply overriding whatever you find | |
10399 | there. But since we don't even decide whether to create a | |
10400 | block until after we've traversed its children, that's hard | |
10401 | to do. */ | |
10402 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
10403 | } |
10404 | local_symbols = new->locals; | |
27aa8d6a | 10405 | using_directives = new->using_directives; |
c906108c SS |
10406 | } |
10407 | ||
96408a79 SA |
10408 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
10409 | ||
10410 | static void | |
10411 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10412 | { | |
10413 | struct objfile *objfile = cu->objfile; | |
10414 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
10415 | CORE_ADDR pc, baseaddr; | |
10416 | struct attribute *attr; | |
10417 | struct call_site *call_site, call_site_local; | |
10418 | void **slot; | |
10419 | int nparams; | |
10420 | struct die_info *child_die; | |
10421 | ||
10422 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
10423 | ||
10424 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
10425 | if (!attr) | |
10426 | { | |
10427 | complaint (&symfile_complaints, | |
10428 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
10429 | "DIE 0x%x [in module %s]"), | |
4262abfb | 10430 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
10431 | return; |
10432 | } | |
10433 | pc = DW_ADDR (attr) + baseaddr; | |
10434 | ||
10435 | if (cu->call_site_htab == NULL) | |
10436 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
10437 | NULL, &objfile->objfile_obstack, | |
10438 | hashtab_obstack_allocate, NULL); | |
10439 | call_site_local.pc = pc; | |
10440 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
10441 | if (*slot != NULL) | |
10442 | { | |
10443 | complaint (&symfile_complaints, | |
10444 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
10445 | "DIE 0x%x [in module %s]"), | |
4262abfb JK |
10446 | paddress (gdbarch, pc), die->offset.sect_off, |
10447 | objfile_name (objfile)); | |
96408a79 SA |
10448 | return; |
10449 | } | |
10450 | ||
10451 | /* Count parameters at the caller. */ | |
10452 | ||
10453 | nparams = 0; | |
10454 | for (child_die = die->child; child_die && child_die->tag; | |
10455 | child_die = sibling_die (child_die)) | |
10456 | { | |
10457 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
10458 | { | |
10459 | complaint (&symfile_complaints, | |
10460 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
10461 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb JK |
10462 | child_die->tag, child_die->offset.sect_off, |
10463 | objfile_name (objfile)); | |
96408a79 SA |
10464 | continue; |
10465 | } | |
10466 | ||
10467 | nparams++; | |
10468 | } | |
10469 | ||
10470 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
10471 | (sizeof (*call_site) | |
10472 | + (sizeof (*call_site->parameter) | |
10473 | * (nparams - 1)))); | |
10474 | *slot = call_site; | |
10475 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
10476 | call_site->pc = pc; | |
10477 | ||
10478 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
10479 | { | |
10480 | struct die_info *func_die; | |
10481 | ||
10482 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
10483 | for (func_die = die->parent; | |
10484 | func_die && func_die->tag != DW_TAG_subprogram | |
10485 | && func_die->tag != DW_TAG_subroutine_type; | |
10486 | func_die = func_die->parent); | |
10487 | ||
10488 | /* DW_AT_GNU_all_call_sites is a superset | |
10489 | of DW_AT_GNU_all_tail_call_sites. */ | |
10490 | if (func_die | |
10491 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
10492 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
10493 | { | |
10494 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
10495 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
10496 | both the initial caller containing the real return address PC and | |
10497 | the final callee containing the current PC of a chain of tail | |
10498 | calls do not need to have the tail call list complete. But any | |
10499 | function candidate for a virtual tail call frame searched via | |
10500 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
10501 | determined unambiguously. */ | |
10502 | } | |
10503 | else | |
10504 | { | |
10505 | struct type *func_type = NULL; | |
10506 | ||
10507 | if (func_die) | |
10508 | func_type = get_die_type (func_die, cu); | |
10509 | if (func_type != NULL) | |
10510 | { | |
10511 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
10512 | ||
10513 | /* Enlist this call site to the function. */ | |
10514 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
10515 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
10516 | } | |
10517 | else | |
10518 | complaint (&symfile_complaints, | |
10519 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
10520 | "DIE 0x%x [in module %s]"), | |
4262abfb | 10521 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
10522 | } |
10523 | } | |
10524 | ||
10525 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
10526 | if (attr == NULL) | |
10527 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
10528 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
10529 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
10530 | /* Keep NULL DWARF_BLOCK. */; | |
10531 | else if (attr_form_is_block (attr)) | |
10532 | { | |
10533 | struct dwarf2_locexpr_baton *dlbaton; | |
10534 | ||
10535 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
10536 | dlbaton->data = DW_BLOCK (attr)->data; | |
10537 | dlbaton->size = DW_BLOCK (attr)->size; | |
10538 | dlbaton->per_cu = cu->per_cu; | |
10539 | ||
10540 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
10541 | } | |
7771576e | 10542 | else if (attr_form_is_ref (attr)) |
96408a79 | 10543 | { |
96408a79 SA |
10544 | struct dwarf2_cu *target_cu = cu; |
10545 | struct die_info *target_die; | |
10546 | ||
ac9ec31b | 10547 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
10548 | gdb_assert (target_cu->objfile == objfile); |
10549 | if (die_is_declaration (target_die, target_cu)) | |
10550 | { | |
9112db09 JK |
10551 | const char *target_physname = NULL; |
10552 | struct attribute *target_attr; | |
10553 | ||
10554 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
10555 | target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu); | |
10556 | if (target_attr == NULL) | |
10557 | target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name, | |
10558 | target_cu); | |
10559 | if (target_attr != NULL && DW_STRING (target_attr) != NULL) | |
10560 | target_physname = DW_STRING (target_attr); | |
10561 | else | |
10562 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
96408a79 SA |
10563 | if (target_physname == NULL) |
10564 | complaint (&symfile_complaints, | |
10565 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
10566 | "physname, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 10567 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 | 10568 | else |
7d455152 | 10569 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
10570 | } |
10571 | else | |
10572 | { | |
10573 | CORE_ADDR lowpc; | |
10574 | ||
10575 | /* DW_AT_entry_pc should be preferred. */ | |
10576 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
10577 | complaint (&symfile_complaints, | |
10578 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
10579 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
4262abfb | 10580 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
10581 | else |
10582 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
10583 | } | |
10584 | } | |
10585 | else | |
10586 | complaint (&symfile_complaints, | |
10587 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
10588 | "block nor reference, for DIE 0x%x [in module %s]"), | |
4262abfb | 10589 | die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
10590 | |
10591 | call_site->per_cu = cu->per_cu; | |
10592 | ||
10593 | for (child_die = die->child; | |
10594 | child_die && child_die->tag; | |
10595 | child_die = sibling_die (child_die)) | |
10596 | { | |
96408a79 | 10597 | struct call_site_parameter *parameter; |
1788b2d3 | 10598 | struct attribute *loc, *origin; |
96408a79 SA |
10599 | |
10600 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
10601 | { | |
10602 | /* Already printed the complaint above. */ | |
10603 | continue; | |
10604 | } | |
10605 | ||
10606 | gdb_assert (call_site->parameter_count < nparams); | |
10607 | parameter = &call_site->parameter[call_site->parameter_count]; | |
10608 | ||
1788b2d3 JK |
10609 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
10610 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
10611 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 10612 | |
24c5c679 | 10613 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 | 10614 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
7771576e | 10615 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 JK |
10616 | { |
10617 | sect_offset offset; | |
10618 | ||
10619 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
10620 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
10621 | if (!offset_in_cu_p (&cu->header, offset)) |
10622 | { | |
10623 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
10624 | binding can be done only inside one CU. Such referenced DIE | |
10625 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
10626 | complaint (&symfile_complaints, | |
10627 | _("DW_AT_abstract_origin offset is not in CU for " | |
10628 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
10629 | "[in module %s]"), | |
4262abfb | 10630 | child_die->offset.sect_off, objfile_name (objfile)); |
d76b7dbc JK |
10631 | continue; |
10632 | } | |
1788b2d3 JK |
10633 | parameter->u.param_offset.cu_off = (offset.sect_off |
10634 | - cu->header.offset.sect_off); | |
10635 | } | |
10636 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
10637 | { |
10638 | complaint (&symfile_complaints, | |
10639 | _("No DW_FORM_block* DW_AT_location for " | |
10640 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 10641 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
10642 | continue; |
10643 | } | |
24c5c679 | 10644 | else |
96408a79 | 10645 | { |
24c5c679 JK |
10646 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
10647 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
10648 | if (parameter->u.dwarf_reg != -1) | |
10649 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
10650 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
10651 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
10652 | ¶meter->u.fb_offset)) | |
10653 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
10654 | else | |
10655 | { | |
10656 | complaint (&symfile_complaints, | |
10657 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
10658 | "for DW_FORM_block* DW_AT_location is supported for " | |
10659 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
10660 | "[in module %s]"), | |
4262abfb | 10661 | child_die->offset.sect_off, objfile_name (objfile)); |
24c5c679 JK |
10662 | continue; |
10663 | } | |
96408a79 SA |
10664 | } |
10665 | ||
10666 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
10667 | if (!attr_form_is_block (attr)) | |
10668 | { | |
10669 | complaint (&symfile_complaints, | |
10670 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
10671 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 10672 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
10673 | continue; |
10674 | } | |
10675 | parameter->value = DW_BLOCK (attr)->data; | |
10676 | parameter->value_size = DW_BLOCK (attr)->size; | |
10677 | ||
10678 | /* Parameters are not pre-cleared by memset above. */ | |
10679 | parameter->data_value = NULL; | |
10680 | parameter->data_value_size = 0; | |
10681 | call_site->parameter_count++; | |
10682 | ||
10683 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
10684 | if (attr) | |
10685 | { | |
10686 | if (!attr_form_is_block (attr)) | |
10687 | complaint (&symfile_complaints, | |
10688 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
10689 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
4262abfb | 10690 | child_die->offset.sect_off, objfile_name (objfile)); |
96408a79 SA |
10691 | else |
10692 | { | |
10693 | parameter->data_value = DW_BLOCK (attr)->data; | |
10694 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
10695 | } | |
10696 | } | |
10697 | } | |
10698 | } | |
10699 | ||
43039443 | 10700 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
10701 | Return 1 if the attributes are present and valid, otherwise, return 0. |
10702 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
10703 | |
10704 | static int | |
10705 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
10706 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
10707 | struct partial_symtab *ranges_pst) | |
43039443 JK |
10708 | { |
10709 | struct objfile *objfile = cu->objfile; | |
10710 | struct comp_unit_head *cu_header = &cu->header; | |
10711 | bfd *obfd = objfile->obfd; | |
10712 | unsigned int addr_size = cu_header->addr_size; | |
10713 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
10714 | /* Base address selection entry. */ | |
10715 | CORE_ADDR base; | |
10716 | int found_base; | |
10717 | unsigned int dummy; | |
d521ce57 | 10718 | const gdb_byte *buffer; |
43039443 JK |
10719 | CORE_ADDR marker; |
10720 | int low_set; | |
10721 | CORE_ADDR low = 0; | |
10722 | CORE_ADDR high = 0; | |
ff013f42 | 10723 | CORE_ADDR baseaddr; |
43039443 | 10724 | |
d00adf39 DE |
10725 | found_base = cu->base_known; |
10726 | base = cu->base_address; | |
43039443 | 10727 | |
be391dca | 10728 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 10729 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
10730 | { |
10731 | complaint (&symfile_complaints, | |
10732 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
10733 | offset); | |
10734 | return 0; | |
10735 | } | |
dce234bc | 10736 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
10737 | |
10738 | /* Read in the largest possible address. */ | |
10739 | marker = read_address (obfd, buffer, cu, &dummy); | |
10740 | if ((marker & mask) == mask) | |
10741 | { | |
10742 | /* If we found the largest possible address, then | |
10743 | read the base address. */ | |
10744 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
10745 | buffer += 2 * addr_size; | |
10746 | offset += 2 * addr_size; | |
10747 | found_base = 1; | |
10748 | } | |
10749 | ||
10750 | low_set = 0; | |
10751 | ||
e7030f15 | 10752 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 10753 | |
43039443 JK |
10754 | while (1) |
10755 | { | |
10756 | CORE_ADDR range_beginning, range_end; | |
10757 | ||
10758 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
10759 | buffer += addr_size; | |
10760 | range_end = read_address (obfd, buffer, cu, &dummy); | |
10761 | buffer += addr_size; | |
10762 | offset += 2 * addr_size; | |
10763 | ||
10764 | /* An end of list marker is a pair of zero addresses. */ | |
10765 | if (range_beginning == 0 && range_end == 0) | |
10766 | /* Found the end of list entry. */ | |
10767 | break; | |
10768 | ||
10769 | /* Each base address selection entry is a pair of 2 values. | |
10770 | The first is the largest possible address, the second is | |
10771 | the base address. Check for a base address here. */ | |
10772 | if ((range_beginning & mask) == mask) | |
10773 | { | |
10774 | /* If we found the largest possible address, then | |
10775 | read the base address. */ | |
10776 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
10777 | found_base = 1; | |
10778 | continue; | |
10779 | } | |
10780 | ||
10781 | if (!found_base) | |
10782 | { | |
10783 | /* We have no valid base address for the ranges | |
10784 | data. */ | |
10785 | complaint (&symfile_complaints, | |
10786 | _("Invalid .debug_ranges data (no base address)")); | |
10787 | return 0; | |
10788 | } | |
10789 | ||
9277c30c UW |
10790 | if (range_beginning > range_end) |
10791 | { | |
10792 | /* Inverted range entries are invalid. */ | |
10793 | complaint (&symfile_complaints, | |
10794 | _("Invalid .debug_ranges data (inverted range)")); | |
10795 | return 0; | |
10796 | } | |
10797 | ||
10798 | /* Empty range entries have no effect. */ | |
10799 | if (range_beginning == range_end) | |
10800 | continue; | |
10801 | ||
43039443 JK |
10802 | range_beginning += base; |
10803 | range_end += base; | |
10804 | ||
01093045 DE |
10805 | /* A not-uncommon case of bad debug info. |
10806 | Don't pollute the addrmap with bad data. */ | |
10807 | if (range_beginning + baseaddr == 0 | |
10808 | && !dwarf2_per_objfile->has_section_at_zero) | |
10809 | { | |
10810 | complaint (&symfile_complaints, | |
10811 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 10812 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
10813 | continue; |
10814 | } | |
10815 | ||
9277c30c | 10816 | if (ranges_pst != NULL) |
ff013f42 | 10817 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
10818 | range_beginning + baseaddr, |
10819 | range_end - 1 + baseaddr, | |
ff013f42 JK |
10820 | ranges_pst); |
10821 | ||
43039443 JK |
10822 | /* FIXME: This is recording everything as a low-high |
10823 | segment of consecutive addresses. We should have a | |
10824 | data structure for discontiguous block ranges | |
10825 | instead. */ | |
10826 | if (! low_set) | |
10827 | { | |
10828 | low = range_beginning; | |
10829 | high = range_end; | |
10830 | low_set = 1; | |
10831 | } | |
10832 | else | |
10833 | { | |
10834 | if (range_beginning < low) | |
10835 | low = range_beginning; | |
10836 | if (range_end > high) | |
10837 | high = range_end; | |
10838 | } | |
10839 | } | |
10840 | ||
10841 | if (! low_set) | |
10842 | /* If the first entry is an end-of-list marker, the range | |
10843 | describes an empty scope, i.e. no instructions. */ | |
10844 | return 0; | |
10845 | ||
10846 | if (low_return) | |
10847 | *low_return = low; | |
10848 | if (high_return) | |
10849 | *high_return = high; | |
10850 | return 1; | |
10851 | } | |
10852 | ||
af34e669 DJ |
10853 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
10854 | are present and valid, otherwise, return 0. Return -1 if the range is | |
10855 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 10856 | |
c906108c | 10857 | static int |
af34e669 | 10858 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
10859 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
10860 | struct partial_symtab *pst) | |
c906108c SS |
10861 | { |
10862 | struct attribute *attr; | |
91da1414 | 10863 | struct attribute *attr_high; |
af34e669 DJ |
10864 | CORE_ADDR low = 0; |
10865 | CORE_ADDR high = 0; | |
10866 | int ret = 0; | |
c906108c | 10867 | |
91da1414 MW |
10868 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10869 | if (attr_high) | |
af34e669 | 10870 | { |
e142c38c | 10871 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 10872 | if (attr) |
91da1414 MW |
10873 | { |
10874 | low = DW_ADDR (attr); | |
3019eac3 DE |
10875 | if (attr_high->form == DW_FORM_addr |
10876 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10877 | high = DW_ADDR (attr_high); |
10878 | else | |
10879 | high = low + DW_UNSND (attr_high); | |
10880 | } | |
af34e669 DJ |
10881 | else |
10882 | /* Found high w/o low attribute. */ | |
10883 | return 0; | |
10884 | ||
10885 | /* Found consecutive range of addresses. */ | |
10886 | ret = 1; | |
10887 | } | |
c906108c | 10888 | else |
af34e669 | 10889 | { |
e142c38c | 10890 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
10891 | if (attr != NULL) |
10892 | { | |
ab435259 DE |
10893 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
10894 | We take advantage of the fact that DW_AT_ranges does not appear | |
10895 | in DW_TAG_compile_unit of DWO files. */ | |
10896 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
10897 | unsigned int ranges_offset = (DW_UNSND (attr) | |
10898 | + (need_ranges_base | |
10899 | ? cu->ranges_base | |
10900 | : 0)); | |
2e3cf129 | 10901 | |
af34e669 | 10902 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 10903 | .debug_ranges section. */ |
2e3cf129 | 10904 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 10905 | return 0; |
43039443 | 10906 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
10907 | ret = -1; |
10908 | } | |
10909 | } | |
c906108c | 10910 | |
9373cf26 JK |
10911 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
10912 | if (high <= low) | |
c906108c SS |
10913 | return 0; |
10914 | ||
10915 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
10916 | eliminate duplicate copies of functions and vtables and such. | |
10917 | The linker will arbitrarily choose one and discard the others. | |
10918 | The AT_*_pc values for such functions refer to local labels in | |
10919 | these sections. If the section from that file was discarded, the | |
10920 | labels are not in the output, so the relocs get a value of 0. | |
10921 | If this is a discarded function, mark the pc bounds as invalid, | |
10922 | so that GDB will ignore it. */ | |
72dca2f5 | 10923 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
10924 | return 0; |
10925 | ||
10926 | *lowpc = low; | |
96408a79 SA |
10927 | if (highpc) |
10928 | *highpc = high; | |
af34e669 | 10929 | return ret; |
c906108c SS |
10930 | } |
10931 | ||
b084d499 JB |
10932 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
10933 | its low and high PC addresses. Do nothing if these addresses could not | |
10934 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
10935 | and HIGHPC to the high address if greater than HIGHPC. */ | |
10936 | ||
10937 | static void | |
10938 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
10939 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10940 | struct dwarf2_cu *cu) | |
10941 | { | |
10942 | CORE_ADDR low, high; | |
10943 | struct die_info *child = die->child; | |
10944 | ||
d85a05f0 | 10945 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
10946 | { |
10947 | *lowpc = min (*lowpc, low); | |
10948 | *highpc = max (*highpc, high); | |
10949 | } | |
10950 | ||
10951 | /* If the language does not allow nested subprograms (either inside | |
10952 | subprograms or lexical blocks), we're done. */ | |
10953 | if (cu->language != language_ada) | |
10954 | return; | |
6e70227d | 10955 | |
b084d499 JB |
10956 | /* Check all the children of the given DIE. If it contains nested |
10957 | subprograms, then check their pc bounds. Likewise, we need to | |
10958 | check lexical blocks as well, as they may also contain subprogram | |
10959 | definitions. */ | |
10960 | while (child && child->tag) | |
10961 | { | |
10962 | if (child->tag == DW_TAG_subprogram | |
10963 | || child->tag == DW_TAG_lexical_block) | |
10964 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
10965 | child = sibling_die (child); | |
10966 | } | |
10967 | } | |
10968 | ||
fae299cd DC |
10969 | /* Get the low and high pc's represented by the scope DIE, and store |
10970 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
10971 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
10972 | ||
10973 | static void | |
10974 | get_scope_pc_bounds (struct die_info *die, | |
10975 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10976 | struct dwarf2_cu *cu) | |
10977 | { | |
10978 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
10979 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
10980 | CORE_ADDR current_low, current_high; | |
10981 | ||
d85a05f0 | 10982 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
10983 | { |
10984 | best_low = current_low; | |
10985 | best_high = current_high; | |
10986 | } | |
10987 | else | |
10988 | { | |
10989 | struct die_info *child = die->child; | |
10990 | ||
10991 | while (child && child->tag) | |
10992 | { | |
10993 | switch (child->tag) { | |
10994 | case DW_TAG_subprogram: | |
b084d499 | 10995 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
10996 | break; |
10997 | case DW_TAG_namespace: | |
f55ee35c | 10998 | case DW_TAG_module: |
fae299cd DC |
10999 | /* FIXME: carlton/2004-01-16: Should we do this for |
11000 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
11001 | that current GCC's always emit the DIEs corresponding | |
11002 | to definitions of methods of classes as children of a | |
11003 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
11004 | the DIEs giving the declarations, which could be | |
11005 | anywhere). But I don't see any reason why the | |
11006 | standards says that they have to be there. */ | |
11007 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
11008 | ||
11009 | if (current_low != ((CORE_ADDR) -1)) | |
11010 | { | |
11011 | best_low = min (best_low, current_low); | |
11012 | best_high = max (best_high, current_high); | |
11013 | } | |
11014 | break; | |
11015 | default: | |
0963b4bd | 11016 | /* Ignore. */ |
fae299cd DC |
11017 | break; |
11018 | } | |
11019 | ||
11020 | child = sibling_die (child); | |
11021 | } | |
11022 | } | |
11023 | ||
11024 | *lowpc = best_low; | |
11025 | *highpc = best_high; | |
11026 | } | |
11027 | ||
801e3a5b JB |
11028 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
11029 | in DIE. */ | |
380bca97 | 11030 | |
801e3a5b JB |
11031 | static void |
11032 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
11033 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
11034 | { | |
bb5ed363 | 11035 | struct objfile *objfile = cu->objfile; |
801e3a5b | 11036 | struct attribute *attr; |
91da1414 | 11037 | struct attribute *attr_high; |
801e3a5b | 11038 | |
91da1414 MW |
11039 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
11040 | if (attr_high) | |
801e3a5b | 11041 | { |
801e3a5b JB |
11042 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
11043 | if (attr) | |
11044 | { | |
11045 | CORE_ADDR low = DW_ADDR (attr); | |
91da1414 | 11046 | CORE_ADDR high; |
3019eac3 DE |
11047 | if (attr_high->form == DW_FORM_addr |
11048 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
11049 | high = DW_ADDR (attr_high); |
11050 | else | |
11051 | high = low + DW_UNSND (attr_high); | |
9a619af0 | 11052 | |
801e3a5b JB |
11053 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
11054 | } | |
11055 | } | |
11056 | ||
11057 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
11058 | if (attr) | |
11059 | { | |
bb5ed363 | 11060 | bfd *obfd = objfile->obfd; |
ab435259 DE |
11061 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
11062 | We take advantage of the fact that DW_AT_ranges does not appear | |
11063 | in DW_TAG_compile_unit of DWO files. */ | |
11064 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
11065 | |
11066 | /* The value of the DW_AT_ranges attribute is the offset of the | |
11067 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
11068 | unsigned long offset = (DW_UNSND (attr) |
11069 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d62bfeaf | 11070 | const gdb_byte *buffer; |
801e3a5b JB |
11071 | |
11072 | /* For some target architectures, but not others, the | |
11073 | read_address function sign-extends the addresses it returns. | |
11074 | To recognize base address selection entries, we need a | |
11075 | mask. */ | |
11076 | unsigned int addr_size = cu->header.addr_size; | |
11077 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
11078 | ||
11079 | /* The base address, to which the next pair is relative. Note | |
11080 | that this 'base' is a DWARF concept: most entries in a range | |
11081 | list are relative, to reduce the number of relocs against the | |
11082 | debugging information. This is separate from this function's | |
11083 | 'baseaddr' argument, which GDB uses to relocate debugging | |
11084 | information from a shared library based on the address at | |
11085 | which the library was loaded. */ | |
d00adf39 DE |
11086 | CORE_ADDR base = cu->base_address; |
11087 | int base_known = cu->base_known; | |
801e3a5b | 11088 | |
d62bfeaf | 11089 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 11090 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
11091 | { |
11092 | complaint (&symfile_complaints, | |
11093 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
11094 | offset); | |
11095 | return; | |
11096 | } | |
d62bfeaf | 11097 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
11098 | |
11099 | for (;;) | |
11100 | { | |
11101 | unsigned int bytes_read; | |
11102 | CORE_ADDR start, end; | |
11103 | ||
11104 | start = read_address (obfd, buffer, cu, &bytes_read); | |
11105 | buffer += bytes_read; | |
11106 | end = read_address (obfd, buffer, cu, &bytes_read); | |
11107 | buffer += bytes_read; | |
11108 | ||
11109 | /* Did we find the end of the range list? */ | |
11110 | if (start == 0 && end == 0) | |
11111 | break; | |
11112 | ||
11113 | /* Did we find a base address selection entry? */ | |
11114 | else if ((start & base_select_mask) == base_select_mask) | |
11115 | { | |
11116 | base = end; | |
11117 | base_known = 1; | |
11118 | } | |
11119 | ||
11120 | /* We found an ordinary address range. */ | |
11121 | else | |
11122 | { | |
11123 | if (!base_known) | |
11124 | { | |
11125 | complaint (&symfile_complaints, | |
3e43a32a MS |
11126 | _("Invalid .debug_ranges data " |
11127 | "(no base address)")); | |
801e3a5b JB |
11128 | return; |
11129 | } | |
11130 | ||
9277c30c UW |
11131 | if (start > end) |
11132 | { | |
11133 | /* Inverted range entries are invalid. */ | |
11134 | complaint (&symfile_complaints, | |
11135 | _("Invalid .debug_ranges data " | |
11136 | "(inverted range)")); | |
11137 | return; | |
11138 | } | |
11139 | ||
11140 | /* Empty range entries have no effect. */ | |
11141 | if (start == end) | |
11142 | continue; | |
11143 | ||
01093045 DE |
11144 | start += base + baseaddr; |
11145 | end += base + baseaddr; | |
11146 | ||
11147 | /* A not-uncommon case of bad debug info. | |
11148 | Don't pollute the addrmap with bad data. */ | |
11149 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
11150 | { | |
11151 | complaint (&symfile_complaints, | |
11152 | _(".debug_ranges entry has start address of zero" | |
4262abfb | 11153 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
11154 | continue; |
11155 | } | |
11156 | ||
11157 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
11158 | } |
11159 | } | |
11160 | } | |
11161 | } | |
11162 | ||
685b1105 JK |
11163 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
11164 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 11165 | |
685b1105 JK |
11166 | static void |
11167 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
11168 | { |
11169 | const char *cs; | |
11170 | int major, minor, release; | |
11171 | ||
11172 | if (cu->producer == NULL) | |
11173 | { | |
11174 | /* For unknown compilers expect their behavior is DWARF version | |
11175 | compliant. | |
11176 | ||
11177 | GCC started to support .debug_types sections by -gdwarf-4 since | |
11178 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
11179 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
11180 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
11181 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 11182 | } |
685b1105 | 11183 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 11184 | { |
685b1105 JK |
11185 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
11186 | ||
ba919b58 TT |
11187 | cs = &cu->producer[strlen ("GNU ")]; |
11188 | while (*cs && !isdigit (*cs)) | |
11189 | cs++; | |
11190 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
11191 | { | |
11192 | /* Not recognized as GCC. */ | |
11193 | } | |
11194 | else | |
1b80a9fa JK |
11195 | { |
11196 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
11197 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
11198 | } | |
685b1105 JK |
11199 | } |
11200 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
11201 | cu->producer_is_icc = 1; | |
11202 | else | |
11203 | { | |
11204 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
11205 | compliant. */ | |
60d5a603 JK |
11206 | } |
11207 | ||
ba919b58 | 11208 | cu->checked_producer = 1; |
685b1105 | 11209 | } |
ba919b58 | 11210 | |
685b1105 JK |
11211 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
11212 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
11213 | during 4.6.0 experimental. */ | |
11214 | ||
11215 | static int | |
11216 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
11217 | { | |
11218 | if (!cu->checked_producer) | |
11219 | check_producer (cu); | |
11220 | ||
11221 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
11222 | } |
11223 | ||
11224 | /* Return the default accessibility type if it is not overriden by | |
11225 | DW_AT_accessibility. */ | |
11226 | ||
11227 | static enum dwarf_access_attribute | |
11228 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
11229 | { | |
11230 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
11231 | { | |
11232 | /* The default DWARF 2 accessibility for members is public, the default | |
11233 | accessibility for inheritance is private. */ | |
11234 | ||
11235 | if (die->tag != DW_TAG_inheritance) | |
11236 | return DW_ACCESS_public; | |
11237 | else | |
11238 | return DW_ACCESS_private; | |
11239 | } | |
11240 | else | |
11241 | { | |
11242 | /* DWARF 3+ defines the default accessibility a different way. The same | |
11243 | rules apply now for DW_TAG_inheritance as for the members and it only | |
11244 | depends on the container kind. */ | |
11245 | ||
11246 | if (die->parent->tag == DW_TAG_class_type) | |
11247 | return DW_ACCESS_private; | |
11248 | else | |
11249 | return DW_ACCESS_public; | |
11250 | } | |
11251 | } | |
11252 | ||
74ac6d43 TT |
11253 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
11254 | offset. If the attribute was not found return 0, otherwise return | |
11255 | 1. If it was found but could not properly be handled, set *OFFSET | |
11256 | to 0. */ | |
11257 | ||
11258 | static int | |
11259 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
11260 | LONGEST *offset) | |
11261 | { | |
11262 | struct attribute *attr; | |
11263 | ||
11264 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
11265 | if (attr != NULL) | |
11266 | { | |
11267 | *offset = 0; | |
11268 | ||
11269 | /* Note that we do not check for a section offset first here. | |
11270 | This is because DW_AT_data_member_location is new in DWARF 4, | |
11271 | so if we see it, we can assume that a constant form is really | |
11272 | a constant and not a section offset. */ | |
11273 | if (attr_form_is_constant (attr)) | |
11274 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
11275 | else if (attr_form_is_section_offset (attr)) | |
11276 | dwarf2_complex_location_expr_complaint (); | |
11277 | else if (attr_form_is_block (attr)) | |
11278 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
11279 | else | |
11280 | dwarf2_complex_location_expr_complaint (); | |
11281 | ||
11282 | return 1; | |
11283 | } | |
11284 | ||
11285 | return 0; | |
11286 | } | |
11287 | ||
c906108c SS |
11288 | /* Add an aggregate field to the field list. */ |
11289 | ||
11290 | static void | |
107d2387 | 11291 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 11292 | struct dwarf2_cu *cu) |
6e70227d | 11293 | { |
e7c27a73 | 11294 | struct objfile *objfile = cu->objfile; |
5e2b427d | 11295 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
11296 | struct nextfield *new_field; |
11297 | struct attribute *attr; | |
11298 | struct field *fp; | |
15d034d0 | 11299 | const char *fieldname = ""; |
c906108c SS |
11300 | |
11301 | /* Allocate a new field list entry and link it in. */ | |
11302 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 11303 | make_cleanup (xfree, new_field); |
c906108c | 11304 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
11305 | |
11306 | if (die->tag == DW_TAG_inheritance) | |
11307 | { | |
11308 | new_field->next = fip->baseclasses; | |
11309 | fip->baseclasses = new_field; | |
11310 | } | |
11311 | else | |
11312 | { | |
11313 | new_field->next = fip->fields; | |
11314 | fip->fields = new_field; | |
11315 | } | |
c906108c SS |
11316 | fip->nfields++; |
11317 | ||
e142c38c | 11318 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
11319 | if (attr) |
11320 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
11321 | else |
11322 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
11323 | if (new_field->accessibility != DW_ACCESS_public) |
11324 | fip->non_public_fields = 1; | |
60d5a603 | 11325 | |
e142c38c | 11326 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
11327 | if (attr) |
11328 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
11329 | else |
11330 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
11331 | |
11332 | fp = &new_field->field; | |
a9a9bd0f | 11333 | |
e142c38c | 11334 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 11335 | { |
74ac6d43 TT |
11336 | LONGEST offset; |
11337 | ||
a9a9bd0f | 11338 | /* Data member other than a C++ static data member. */ |
6e70227d | 11339 | |
c906108c | 11340 | /* Get type of field. */ |
e7c27a73 | 11341 | fp->type = die_type (die, cu); |
c906108c | 11342 | |
d6a843b5 | 11343 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 11344 | |
c906108c | 11345 | /* Get bit size of field (zero if none). */ |
e142c38c | 11346 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
11347 | if (attr) |
11348 | { | |
11349 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
11350 | } | |
11351 | else | |
11352 | { | |
11353 | FIELD_BITSIZE (*fp) = 0; | |
11354 | } | |
11355 | ||
11356 | /* Get bit offset of field. */ | |
74ac6d43 TT |
11357 | if (handle_data_member_location (die, cu, &offset)) |
11358 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 11359 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
11360 | if (attr) |
11361 | { | |
5e2b427d | 11362 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
11363 | { |
11364 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
11365 | additional bit offset from the MSB of the containing |
11366 | anonymous object to the MSB of the field. We don't | |
11367 | have to do anything special since we don't need to | |
11368 | know the size of the anonymous object. */ | |
f41f5e61 | 11369 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
11370 | } |
11371 | else | |
11372 | { | |
11373 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
11374 | MSB of the anonymous object, subtract off the number of |
11375 | bits from the MSB of the field to the MSB of the | |
11376 | object, and then subtract off the number of bits of | |
11377 | the field itself. The result is the bit offset of | |
11378 | the LSB of the field. */ | |
c906108c SS |
11379 | int anonymous_size; |
11380 | int bit_offset = DW_UNSND (attr); | |
11381 | ||
e142c38c | 11382 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11383 | if (attr) |
11384 | { | |
11385 | /* The size of the anonymous object containing | |
11386 | the bit field is explicit, so use the | |
11387 | indicated size (in bytes). */ | |
11388 | anonymous_size = DW_UNSND (attr); | |
11389 | } | |
11390 | else | |
11391 | { | |
11392 | /* The size of the anonymous object containing | |
11393 | the bit field must be inferred from the type | |
11394 | attribute of the data member containing the | |
11395 | bit field. */ | |
11396 | anonymous_size = TYPE_LENGTH (fp->type); | |
11397 | } | |
f41f5e61 PA |
11398 | SET_FIELD_BITPOS (*fp, |
11399 | (FIELD_BITPOS (*fp) | |
11400 | + anonymous_size * bits_per_byte | |
11401 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
11402 | } |
11403 | } | |
11404 | ||
11405 | /* Get name of field. */ | |
39cbfefa DJ |
11406 | fieldname = dwarf2_name (die, cu); |
11407 | if (fieldname == NULL) | |
11408 | fieldname = ""; | |
d8151005 DJ |
11409 | |
11410 | /* The name is already allocated along with this objfile, so we don't | |
11411 | need to duplicate it for the type. */ | |
11412 | fp->name = fieldname; | |
c906108c SS |
11413 | |
11414 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 11415 | pointer or virtual base class pointer) to private. */ |
e142c38c | 11416 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 11417 | { |
d48cc9dd | 11418 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
11419 | new_field->accessibility = DW_ACCESS_private; |
11420 | fip->non_public_fields = 1; | |
11421 | } | |
11422 | } | |
a9a9bd0f | 11423 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 11424 | { |
a9a9bd0f DC |
11425 | /* C++ static member. */ |
11426 | ||
11427 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
11428 | is a declaration, but all versions of G++ as of this writing | |
11429 | (so through at least 3.2.1) incorrectly generate | |
11430 | DW_TAG_variable tags. */ | |
6e70227d | 11431 | |
ff355380 | 11432 | const char *physname; |
c906108c | 11433 | |
a9a9bd0f | 11434 | /* Get name of field. */ |
39cbfefa DJ |
11435 | fieldname = dwarf2_name (die, cu); |
11436 | if (fieldname == NULL) | |
c906108c SS |
11437 | return; |
11438 | ||
254e6b9e | 11439 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
11440 | if (attr |
11441 | /* Only create a symbol if this is an external value. | |
11442 | new_symbol checks this and puts the value in the global symbol | |
11443 | table, which we want. If it is not external, new_symbol | |
11444 | will try to put the value in cu->list_in_scope which is wrong. */ | |
11445 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
11446 | { |
11447 | /* A static const member, not much different than an enum as far as | |
11448 | we're concerned, except that we can support more types. */ | |
11449 | new_symbol (die, NULL, cu); | |
11450 | } | |
11451 | ||
2df3850c | 11452 | /* Get physical name. */ |
ff355380 | 11453 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 11454 | |
d8151005 DJ |
11455 | /* The name is already allocated along with this objfile, so we don't |
11456 | need to duplicate it for the type. */ | |
11457 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 11458 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 11459 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
11460 | } |
11461 | else if (die->tag == DW_TAG_inheritance) | |
11462 | { | |
74ac6d43 | 11463 | LONGEST offset; |
d4b96c9a | 11464 | |
74ac6d43 TT |
11465 | /* C++ base class field. */ |
11466 | if (handle_data_member_location (die, cu, &offset)) | |
11467 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 11468 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 11469 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
11470 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
11471 | fip->nbaseclasses++; | |
11472 | } | |
11473 | } | |
11474 | ||
98751a41 JK |
11475 | /* Add a typedef defined in the scope of the FIP's class. */ |
11476 | ||
11477 | static void | |
11478 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
11479 | struct dwarf2_cu *cu) | |
6e70227d | 11480 | { |
98751a41 | 11481 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
11482 | struct typedef_field_list *new_field; |
11483 | struct attribute *attr; | |
11484 | struct typedef_field *fp; | |
11485 | char *fieldname = ""; | |
11486 | ||
11487 | /* Allocate a new field list entry and link it in. */ | |
11488 | new_field = xzalloc (sizeof (*new_field)); | |
11489 | make_cleanup (xfree, new_field); | |
11490 | ||
11491 | gdb_assert (die->tag == DW_TAG_typedef); | |
11492 | ||
11493 | fp = &new_field->field; | |
11494 | ||
11495 | /* Get name of field. */ | |
11496 | fp->name = dwarf2_name (die, cu); | |
11497 | if (fp->name == NULL) | |
11498 | return; | |
11499 | ||
11500 | fp->type = read_type_die (die, cu); | |
11501 | ||
11502 | new_field->next = fip->typedef_field_list; | |
11503 | fip->typedef_field_list = new_field; | |
11504 | fip->typedef_field_list_count++; | |
11505 | } | |
11506 | ||
c906108c SS |
11507 | /* Create the vector of fields, and attach it to the type. */ |
11508 | ||
11509 | static void | |
fba45db2 | 11510 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 11511 | struct dwarf2_cu *cu) |
c906108c SS |
11512 | { |
11513 | int nfields = fip->nfields; | |
11514 | ||
11515 | /* Record the field count, allocate space for the array of fields, | |
11516 | and create blank accessibility bitfields if necessary. */ | |
11517 | TYPE_NFIELDS (type) = nfields; | |
11518 | TYPE_FIELDS (type) = (struct field *) | |
11519 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
11520 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
11521 | ||
b4ba55a1 | 11522 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
11523 | { |
11524 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
11525 | ||
11526 | TYPE_FIELD_PRIVATE_BITS (type) = | |
11527 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
11528 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
11529 | ||
11530 | TYPE_FIELD_PROTECTED_BITS (type) = | |
11531 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
11532 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
11533 | ||
774b6a14 TT |
11534 | TYPE_FIELD_IGNORE_BITS (type) = |
11535 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
11536 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
11537 | } |
11538 | ||
11539 | /* If the type has baseclasses, allocate and clear a bit vector for | |
11540 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 11541 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
11542 | { |
11543 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 11544 | unsigned char *pointer; |
c906108c SS |
11545 | |
11546 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
11547 | pointer = TYPE_ALLOC (type, num_bytes); |
11548 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
11549 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
11550 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
11551 | } | |
11552 | ||
3e43a32a MS |
11553 | /* Copy the saved-up fields into the field vector. Start from the head of |
11554 | the list, adding to the tail of the field array, so that they end up in | |
11555 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
11556 | while (nfields-- > 0) |
11557 | { | |
7d0ccb61 DJ |
11558 | struct nextfield *fieldp; |
11559 | ||
11560 | if (fip->fields) | |
11561 | { | |
11562 | fieldp = fip->fields; | |
11563 | fip->fields = fieldp->next; | |
11564 | } | |
11565 | else | |
11566 | { | |
11567 | fieldp = fip->baseclasses; | |
11568 | fip->baseclasses = fieldp->next; | |
11569 | } | |
11570 | ||
11571 | TYPE_FIELD (type, nfields) = fieldp->field; | |
11572 | switch (fieldp->accessibility) | |
c906108c | 11573 | { |
c5aa993b | 11574 | case DW_ACCESS_private: |
b4ba55a1 JB |
11575 | if (cu->language != language_ada) |
11576 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 11577 | break; |
c906108c | 11578 | |
c5aa993b | 11579 | case DW_ACCESS_protected: |
b4ba55a1 JB |
11580 | if (cu->language != language_ada) |
11581 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 11582 | break; |
c906108c | 11583 | |
c5aa993b JM |
11584 | case DW_ACCESS_public: |
11585 | break; | |
c906108c | 11586 | |
c5aa993b JM |
11587 | default: |
11588 | /* Unknown accessibility. Complain and treat it as public. */ | |
11589 | { | |
e2e0b3e5 | 11590 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 11591 | fieldp->accessibility); |
c5aa993b JM |
11592 | } |
11593 | break; | |
c906108c SS |
11594 | } |
11595 | if (nfields < fip->nbaseclasses) | |
11596 | { | |
7d0ccb61 | 11597 | switch (fieldp->virtuality) |
c906108c | 11598 | { |
c5aa993b JM |
11599 | case DW_VIRTUALITY_virtual: |
11600 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 11601 | if (cu->language == language_ada) |
a73c6dcd | 11602 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
11603 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
11604 | break; | |
c906108c SS |
11605 | } |
11606 | } | |
c906108c SS |
11607 | } |
11608 | } | |
11609 | ||
7d27a96d TT |
11610 | /* Return true if this member function is a constructor, false |
11611 | otherwise. */ | |
11612 | ||
11613 | static int | |
11614 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
11615 | { | |
11616 | const char *fieldname; | |
11617 | const char *typename; | |
11618 | int len; | |
11619 | ||
11620 | if (die->parent == NULL) | |
11621 | return 0; | |
11622 | ||
11623 | if (die->parent->tag != DW_TAG_structure_type | |
11624 | && die->parent->tag != DW_TAG_union_type | |
11625 | && die->parent->tag != DW_TAG_class_type) | |
11626 | return 0; | |
11627 | ||
11628 | fieldname = dwarf2_name (die, cu); | |
11629 | typename = dwarf2_name (die->parent, cu); | |
11630 | if (fieldname == NULL || typename == NULL) | |
11631 | return 0; | |
11632 | ||
11633 | len = strlen (fieldname); | |
11634 | return (strncmp (fieldname, typename, len) == 0 | |
11635 | && (typename[len] == '\0' || typename[len] == '<')); | |
11636 | } | |
11637 | ||
c906108c SS |
11638 | /* Add a member function to the proper fieldlist. */ |
11639 | ||
11640 | static void | |
107d2387 | 11641 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 11642 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 11643 | { |
e7c27a73 | 11644 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11645 | struct attribute *attr; |
11646 | struct fnfieldlist *flp; | |
11647 | int i; | |
11648 | struct fn_field *fnp; | |
15d034d0 | 11649 | const char *fieldname; |
c906108c | 11650 | struct nextfnfield *new_fnfield; |
f792889a | 11651 | struct type *this_type; |
60d5a603 | 11652 | enum dwarf_access_attribute accessibility; |
c906108c | 11653 | |
b4ba55a1 | 11654 | if (cu->language == language_ada) |
a73c6dcd | 11655 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 11656 | |
2df3850c | 11657 | /* Get name of member function. */ |
39cbfefa DJ |
11658 | fieldname = dwarf2_name (die, cu); |
11659 | if (fieldname == NULL) | |
2df3850c | 11660 | return; |
c906108c | 11661 | |
c906108c SS |
11662 | /* Look up member function name in fieldlist. */ |
11663 | for (i = 0; i < fip->nfnfields; i++) | |
11664 | { | |
27bfe10e | 11665 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
11666 | break; |
11667 | } | |
11668 | ||
11669 | /* Create new list element if necessary. */ | |
11670 | if (i < fip->nfnfields) | |
11671 | flp = &fip->fnfieldlists[i]; | |
11672 | else | |
11673 | { | |
11674 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
11675 | { | |
11676 | fip->fnfieldlists = (struct fnfieldlist *) | |
11677 | xrealloc (fip->fnfieldlists, | |
11678 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 11679 | * sizeof (struct fnfieldlist)); |
c906108c | 11680 | if (fip->nfnfields == 0) |
c13c43fd | 11681 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
11682 | } |
11683 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
11684 | flp->name = fieldname; | |
11685 | flp->length = 0; | |
11686 | flp->head = NULL; | |
3da10d80 | 11687 | i = fip->nfnfields++; |
c906108c SS |
11688 | } |
11689 | ||
11690 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 11691 | entry. */ |
c906108c | 11692 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 11693 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
11694 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
11695 | new_fnfield->next = flp->head; | |
11696 | flp->head = new_fnfield; | |
11697 | flp->length++; | |
11698 | ||
11699 | /* Fill in the member function field info. */ | |
11700 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
11701 | |
11702 | /* Delay processing of the physname until later. */ | |
11703 | if (cu->language == language_cplus || cu->language == language_java) | |
11704 | { | |
11705 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
11706 | die, cu); | |
11707 | } | |
11708 | else | |
11709 | { | |
1d06ead6 | 11710 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
11711 | fnp->physname = physname ? physname : ""; |
11712 | } | |
11713 | ||
c906108c | 11714 | fnp->type = alloc_type (objfile); |
f792889a DJ |
11715 | this_type = read_type_die (die, cu); |
11716 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 11717 | { |
f792889a | 11718 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 11719 | |
f792889a | 11720 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
11721 | of the method itself (TYPE_CODE_METHOD). */ |
11722 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
11723 | TYPE_TARGET_TYPE (this_type), |
11724 | TYPE_FIELDS (this_type), | |
11725 | TYPE_NFIELDS (this_type), | |
11726 | TYPE_VARARGS (this_type)); | |
c906108c SS |
11727 | |
11728 | /* Handle static member functions. | |
c5aa993b | 11729 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
11730 | member functions. G++ helps GDB by marking the first |
11731 | parameter for non-static member functions (which is the this | |
11732 | pointer) as artificial. We obtain this information from | |
11733 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 11734 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
11735 | fnp->voffset = VOFFSET_STATIC; |
11736 | } | |
11737 | else | |
e2e0b3e5 | 11738 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 11739 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
11740 | |
11741 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 11742 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 11743 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 11744 | |
3e43a32a MS |
11745 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
11746 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
11747 | |
11748 | /* Get accessibility. */ | |
e142c38c | 11749 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 11750 | if (attr) |
60d5a603 JK |
11751 | accessibility = DW_UNSND (attr); |
11752 | else | |
11753 | accessibility = dwarf2_default_access_attribute (die, cu); | |
11754 | switch (accessibility) | |
c906108c | 11755 | { |
60d5a603 JK |
11756 | case DW_ACCESS_private: |
11757 | fnp->is_private = 1; | |
11758 | break; | |
11759 | case DW_ACCESS_protected: | |
11760 | fnp->is_protected = 1; | |
11761 | break; | |
c906108c SS |
11762 | } |
11763 | ||
b02dede2 | 11764 | /* Check for artificial methods. */ |
e142c38c | 11765 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
11766 | if (attr && DW_UNSND (attr) != 0) |
11767 | fnp->is_artificial = 1; | |
11768 | ||
7d27a96d TT |
11769 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
11770 | ||
0d564a31 | 11771 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
11772 | function. For older versions of GCC, this is an offset in the |
11773 | appropriate virtual table, as specified by DW_AT_containing_type. | |
11774 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
11775 | to the object address. */ |
11776 | ||
e142c38c | 11777 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 11778 | if (attr) |
8e19ed76 | 11779 | { |
aec5aa8b | 11780 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 11781 | { |
aec5aa8b TT |
11782 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
11783 | { | |
11784 | /* Old-style GCC. */ | |
11785 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
11786 | } | |
11787 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
11788 | || (DW_BLOCK (attr)->size > 1 | |
11789 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
11790 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
11791 | { | |
11792 | struct dwarf_block blk; | |
11793 | int offset; | |
11794 | ||
11795 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
11796 | ? 1 : 2); | |
11797 | blk.size = DW_BLOCK (attr)->size - offset; | |
11798 | blk.data = DW_BLOCK (attr)->data + offset; | |
11799 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
11800 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
11801 | dwarf2_complex_location_expr_complaint (); | |
11802 | else | |
11803 | fnp->voffset /= cu->header.addr_size; | |
11804 | fnp->voffset += 2; | |
11805 | } | |
11806 | else | |
11807 | dwarf2_complex_location_expr_complaint (); | |
11808 | ||
11809 | if (!fnp->fcontext) | |
11810 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
11811 | } | |
3690dd37 | 11812 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 11813 | { |
4d3c2250 | 11814 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
11815 | } |
11816 | else | |
11817 | { | |
4d3c2250 KB |
11818 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
11819 | fieldname); | |
8e19ed76 | 11820 | } |
0d564a31 | 11821 | } |
d48cc9dd DJ |
11822 | else |
11823 | { | |
11824 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
11825 | if (attr && DW_UNSND (attr)) | |
11826 | { | |
11827 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
11828 | complaint (&symfile_complaints, | |
3e43a32a MS |
11829 | _("Member function \"%s\" (offset %d) is virtual " |
11830 | "but the vtable offset is not specified"), | |
b64f50a1 | 11831 | fieldname, die->offset.sect_off); |
9655fd1a | 11832 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
11833 | TYPE_CPLUS_DYNAMIC (type) = 1; |
11834 | } | |
11835 | } | |
c906108c SS |
11836 | } |
11837 | ||
11838 | /* Create the vector of member function fields, and attach it to the type. */ | |
11839 | ||
11840 | static void | |
fba45db2 | 11841 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 11842 | struct dwarf2_cu *cu) |
c906108c SS |
11843 | { |
11844 | struct fnfieldlist *flp; | |
c906108c SS |
11845 | int i; |
11846 | ||
b4ba55a1 | 11847 | if (cu->language == language_ada) |
a73c6dcd | 11848 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 11849 | |
c906108c SS |
11850 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
11851 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
11852 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
11853 | ||
11854 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
11855 | { | |
11856 | struct nextfnfield *nfp = flp->head; | |
11857 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
11858 | int k; | |
11859 | ||
11860 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
11861 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
11862 | fn_flp->fn_fields = (struct fn_field *) | |
11863 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
11864 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 11865 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
11866 | } |
11867 | ||
11868 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
11869 | } |
11870 | ||
1168df01 JB |
11871 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
11872 | language, zero otherwise. */ | |
11873 | static int | |
11874 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
11875 | { | |
11876 | static const char vptr[] = "_vptr"; | |
987504bb | 11877 | static const char vtable[] = "vtable"; |
1168df01 | 11878 | |
987504bb JJ |
11879 | /* Look for the C++ and Java forms of the vtable. */ |
11880 | if ((cu->language == language_java | |
11881 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
11882 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
11883 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
11884 | return 1; |
11885 | ||
11886 | return 0; | |
11887 | } | |
11888 | ||
c0dd20ea | 11889 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
11890 | functions, with the ABI-specified layout. If TYPE describes |
11891 | such a structure, smash it into a member function type. | |
61049d3b DJ |
11892 | |
11893 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
11894 | This is GCC PR debug/28767. */ | |
c0dd20ea | 11895 | |
0b92b5bb TT |
11896 | static void |
11897 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 11898 | { |
0b92b5bb | 11899 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
11900 | |
11901 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
11902 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
11903 | return; | |
c0dd20ea DJ |
11904 | |
11905 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
11906 | if (TYPE_FIELD_NAME (type, 0) == NULL |
11907 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
11908 | || TYPE_FIELD_NAME (type, 1) == NULL | |
11909 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
11910 | return; | |
c0dd20ea DJ |
11911 | |
11912 | /* Find the type of the method. */ | |
0b92b5bb | 11913 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
11914 | if (pfn_type == NULL |
11915 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
11916 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 11917 | return; |
c0dd20ea DJ |
11918 | |
11919 | /* Look for the "this" argument. */ | |
11920 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
11921 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 11922 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 11923 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 11924 | return; |
c0dd20ea DJ |
11925 | |
11926 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
11927 | new_type = alloc_type (objfile); |
11928 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
11929 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
11930 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 11931 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 11932 | } |
1168df01 | 11933 | |
685b1105 JK |
11934 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
11935 | (icc). */ | |
11936 | ||
11937 | static int | |
11938 | producer_is_icc (struct dwarf2_cu *cu) | |
11939 | { | |
11940 | if (!cu->checked_producer) | |
11941 | check_producer (cu); | |
11942 | ||
11943 | return cu->producer_is_icc; | |
11944 | } | |
11945 | ||
c906108c | 11946 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
11947 | (definition) to create a type for the structure or union. Fill in |
11948 | the type's name and general properties; the members will not be | |
3d1d5ea3 | 11949 | processed until process_structure_scope. |
c906108c | 11950 | |
c767944b DJ |
11951 | NOTE: we need to call these functions regardless of whether or not the |
11952 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c SS |
11953 | structure or union. This gets the type entered into our set of |
11954 | user defined types. | |
11955 | ||
11956 | However, if the structure is incomplete (an opaque struct/union) | |
11957 | then suppress creating a symbol table entry for it since gdb only | |
11958 | wants to find the one with the complete definition. Note that if | |
11959 | it is complete, we just call new_symbol, which does it's own | |
11960 | checking about whether the struct/union is anonymous or not (and | |
11961 | suppresses creating a symbol table entry itself). */ | |
11962 | ||
f792889a | 11963 | static struct type * |
134d01f1 | 11964 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11965 | { |
e7c27a73 | 11966 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11967 | struct type *type; |
11968 | struct attribute *attr; | |
15d034d0 | 11969 | const char *name; |
c906108c | 11970 | |
348e048f DE |
11971 | /* If the definition of this type lives in .debug_types, read that type. |
11972 | Don't follow DW_AT_specification though, that will take us back up | |
11973 | the chain and we want to go down. */ | |
45e58e77 | 11974 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11975 | if (attr) |
11976 | { | |
ac9ec31b | 11977 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 11978 | |
ac9ec31b | 11979 | /* The type's CU may not be the same as CU. |
02142a6c | 11980 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
11981 | return set_die_type (die, type, cu); |
11982 | } | |
11983 | ||
c0dd20ea | 11984 | type = alloc_type (objfile); |
c906108c | 11985 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 11986 | |
39cbfefa DJ |
11987 | name = dwarf2_name (die, cu); |
11988 | if (name != NULL) | |
c906108c | 11989 | { |
987504bb JJ |
11990 | if (cu->language == language_cplus |
11991 | || cu->language == language_java) | |
63d06c5c | 11992 | { |
15d034d0 | 11993 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
11994 | |
11995 | /* dwarf2_full_name might have already finished building the DIE's | |
11996 | type. If so, there is no need to continue. */ | |
11997 | if (get_die_type (die, cu) != NULL) | |
11998 | return get_die_type (die, cu); | |
11999 | ||
12000 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
12001 | if (die->tag == DW_TAG_structure_type |
12002 | || die->tag == DW_TAG_class_type) | |
12003 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
12004 | } |
12005 | else | |
12006 | { | |
d8151005 DJ |
12007 | /* The name is already allocated along with this objfile, so |
12008 | we don't need to duplicate it for the type. */ | |
7d455152 | 12009 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
12010 | if (die->tag == DW_TAG_class_type) |
12011 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 12012 | } |
c906108c SS |
12013 | } |
12014 | ||
12015 | if (die->tag == DW_TAG_structure_type) | |
12016 | { | |
12017 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
12018 | } | |
12019 | else if (die->tag == DW_TAG_union_type) | |
12020 | { | |
12021 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
12022 | } | |
12023 | else | |
12024 | { | |
c906108c SS |
12025 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
12026 | } | |
12027 | ||
0cc2414c TT |
12028 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
12029 | TYPE_DECLARED_CLASS (type) = 1; | |
12030 | ||
e142c38c | 12031 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12032 | if (attr) |
12033 | { | |
12034 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12035 | } | |
12036 | else | |
12037 | { | |
12038 | TYPE_LENGTH (type) = 0; | |
12039 | } | |
12040 | ||
685b1105 JK |
12041 | if (producer_is_icc (cu)) |
12042 | { | |
12043 | /* ICC does not output the required DW_AT_declaration | |
12044 | on incomplete types, but gives them a size of zero. */ | |
12045 | } | |
12046 | else | |
12047 | TYPE_STUB_SUPPORTED (type) = 1; | |
12048 | ||
dc718098 | 12049 | if (die_is_declaration (die, cu)) |
876cecd0 | 12050 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
12051 | else if (attr == NULL && die->child == NULL |
12052 | && producer_is_realview (cu->producer)) | |
12053 | /* RealView does not output the required DW_AT_declaration | |
12054 | on incomplete types. */ | |
12055 | TYPE_STUB (type) = 1; | |
dc718098 | 12056 | |
c906108c SS |
12057 | /* We need to add the type field to the die immediately so we don't |
12058 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 12059 | type within the structure itself. */ |
1c379e20 | 12060 | set_die_type (die, type, cu); |
c906108c | 12061 | |
7e314c57 JK |
12062 | /* set_die_type should be already done. */ |
12063 | set_descriptive_type (type, die, cu); | |
12064 | ||
c767944b DJ |
12065 | return type; |
12066 | } | |
12067 | ||
12068 | /* Finish creating a structure or union type, including filling in | |
12069 | its members and creating a symbol for it. */ | |
12070 | ||
12071 | static void | |
12072 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12073 | { | |
12074 | struct objfile *objfile = cu->objfile; | |
12075 | struct die_info *child_die = die->child; | |
12076 | struct type *type; | |
12077 | ||
12078 | type = get_die_type (die, cu); | |
12079 | if (type == NULL) | |
12080 | type = read_structure_type (die, cu); | |
12081 | ||
e142c38c | 12082 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
12083 | { |
12084 | struct field_info fi; | |
12085 | struct die_info *child_die; | |
34eaf542 | 12086 | VEC (symbolp) *template_args = NULL; |
c767944b | 12087 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
12088 | |
12089 | memset (&fi, 0, sizeof (struct field_info)); | |
12090 | ||
639d11d3 | 12091 | child_die = die->child; |
c906108c SS |
12092 | |
12093 | while (child_die && child_die->tag) | |
12094 | { | |
a9a9bd0f DC |
12095 | if (child_die->tag == DW_TAG_member |
12096 | || child_die->tag == DW_TAG_variable) | |
c906108c | 12097 | { |
a9a9bd0f DC |
12098 | /* NOTE: carlton/2002-11-05: A C++ static data member |
12099 | should be a DW_TAG_member that is a declaration, but | |
12100 | all versions of G++ as of this writing (so through at | |
12101 | least 3.2.1) incorrectly generate DW_TAG_variable | |
12102 | tags for them instead. */ | |
e7c27a73 | 12103 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 12104 | } |
8713b1b1 | 12105 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 12106 | { |
0963b4bd | 12107 | /* C++ member function. */ |
e7c27a73 | 12108 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
12109 | } |
12110 | else if (child_die->tag == DW_TAG_inheritance) | |
12111 | { | |
12112 | /* C++ base class field. */ | |
e7c27a73 | 12113 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 12114 | } |
98751a41 JK |
12115 | else if (child_die->tag == DW_TAG_typedef) |
12116 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
12117 | else if (child_die->tag == DW_TAG_template_type_param |
12118 | || child_die->tag == DW_TAG_template_value_param) | |
12119 | { | |
12120 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12121 | ||
f1078f66 DJ |
12122 | if (arg != NULL) |
12123 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
12124 | } |
12125 | ||
c906108c SS |
12126 | child_die = sibling_die (child_die); |
12127 | } | |
12128 | ||
34eaf542 TT |
12129 | /* Attach template arguments to type. */ |
12130 | if (! VEC_empty (symbolp, template_args)) | |
12131 | { | |
12132 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
12133 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12134 | = VEC_length (symbolp, template_args); | |
12135 | TYPE_TEMPLATE_ARGUMENTS (type) | |
12136 | = obstack_alloc (&objfile->objfile_obstack, | |
12137 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12138 | * sizeof (struct symbol *))); | |
12139 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
12140 | VEC_address (symbolp, template_args), | |
12141 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
12142 | * sizeof (struct symbol *))); | |
12143 | VEC_free (symbolp, template_args); | |
12144 | } | |
12145 | ||
c906108c SS |
12146 | /* Attach fields and member functions to the type. */ |
12147 | if (fi.nfields) | |
e7c27a73 | 12148 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
12149 | if (fi.nfnfields) |
12150 | { | |
e7c27a73 | 12151 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 12152 | |
c5aa993b | 12153 | /* Get the type which refers to the base class (possibly this |
c906108c | 12154 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
12155 | class from the DW_AT_containing_type attribute. This use of |
12156 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 12157 | |
e142c38c | 12158 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 12159 | { |
e7c27a73 | 12160 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
12161 | |
12162 | TYPE_VPTR_BASETYPE (type) = t; | |
12163 | if (type == t) | |
12164 | { | |
c906108c SS |
12165 | int i; |
12166 | ||
12167 | /* Our own class provides vtbl ptr. */ | |
12168 | for (i = TYPE_NFIELDS (t) - 1; | |
12169 | i >= TYPE_N_BASECLASSES (t); | |
12170 | --i) | |
12171 | { | |
0d5cff50 | 12172 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 12173 | |
1168df01 | 12174 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
12175 | { |
12176 | TYPE_VPTR_FIELDNO (type) = i; | |
12177 | break; | |
12178 | } | |
12179 | } | |
12180 | ||
12181 | /* Complain if virtual function table field not found. */ | |
12182 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 12183 | complaint (&symfile_complaints, |
3e43a32a MS |
12184 | _("virtual function table pointer " |
12185 | "not found when defining class '%s'"), | |
4d3c2250 KB |
12186 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
12187 | ""); | |
c906108c SS |
12188 | } |
12189 | else | |
12190 | { | |
12191 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
12192 | } | |
12193 | } | |
f6235d4c EZ |
12194 | else if (cu->producer |
12195 | && strncmp (cu->producer, | |
12196 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
12197 | { | |
12198 | /* The IBM XLC compiler does not provide direct indication | |
12199 | of the containing type, but the vtable pointer is | |
12200 | always named __vfp. */ | |
12201 | ||
12202 | int i; | |
12203 | ||
12204 | for (i = TYPE_NFIELDS (type) - 1; | |
12205 | i >= TYPE_N_BASECLASSES (type); | |
12206 | --i) | |
12207 | { | |
12208 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
12209 | { | |
12210 | TYPE_VPTR_FIELDNO (type) = i; | |
12211 | TYPE_VPTR_BASETYPE (type) = type; | |
12212 | break; | |
12213 | } | |
12214 | } | |
12215 | } | |
c906108c | 12216 | } |
98751a41 JK |
12217 | |
12218 | /* Copy fi.typedef_field_list linked list elements content into the | |
12219 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
12220 | if (fi.typedef_field_list) | |
12221 | { | |
12222 | int i = fi.typedef_field_list_count; | |
12223 | ||
a0d7a4ff | 12224 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
12225 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
12226 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
12227 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
12228 | ||
12229 | /* Reverse the list order to keep the debug info elements order. */ | |
12230 | while (--i >= 0) | |
12231 | { | |
12232 | struct typedef_field *dest, *src; | |
6e70227d | 12233 | |
98751a41 JK |
12234 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
12235 | src = &fi.typedef_field_list->field; | |
12236 | fi.typedef_field_list = fi.typedef_field_list->next; | |
12237 | *dest = *src; | |
12238 | } | |
12239 | } | |
c767944b DJ |
12240 | |
12241 | do_cleanups (back_to); | |
eb2a6f42 TT |
12242 | |
12243 | if (HAVE_CPLUS_STRUCT (type)) | |
12244 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 12245 | } |
63d06c5c | 12246 | |
bb5ed363 | 12247 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 12248 | |
90aeadfc DC |
12249 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
12250 | snapshots) has been known to create a die giving a declaration | |
12251 | for a class that has, as a child, a die giving a definition for a | |
12252 | nested class. So we have to process our children even if the | |
12253 | current die is a declaration. Normally, of course, a declaration | |
12254 | won't have any children at all. */ | |
134d01f1 | 12255 | |
90aeadfc DC |
12256 | while (child_die != NULL && child_die->tag) |
12257 | { | |
12258 | if (child_die->tag == DW_TAG_member | |
12259 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
12260 | || child_die->tag == DW_TAG_inheritance |
12261 | || child_die->tag == DW_TAG_template_value_param | |
12262 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 12263 | { |
90aeadfc | 12264 | /* Do nothing. */ |
134d01f1 | 12265 | } |
90aeadfc DC |
12266 | else |
12267 | process_die (child_die, cu); | |
134d01f1 | 12268 | |
90aeadfc | 12269 | child_die = sibling_die (child_die); |
134d01f1 DJ |
12270 | } |
12271 | ||
fa4028e9 JB |
12272 | /* Do not consider external references. According to the DWARF standard, |
12273 | these DIEs are identified by the fact that they have no byte_size | |
12274 | attribute, and a declaration attribute. */ | |
12275 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
12276 | || !die_is_declaration (die, cu)) | |
c767944b | 12277 | new_symbol (die, type, cu); |
134d01f1 DJ |
12278 | } |
12279 | ||
12280 | /* Given a DW_AT_enumeration_type die, set its type. We do not | |
12281 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 12282 | |
f792889a | 12283 | static struct type * |
134d01f1 | 12284 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12285 | { |
e7c27a73 | 12286 | struct objfile *objfile = cu->objfile; |
c906108c | 12287 | struct type *type; |
c906108c | 12288 | struct attribute *attr; |
0114d602 | 12289 | const char *name; |
134d01f1 | 12290 | |
348e048f DE |
12291 | /* If the definition of this type lives in .debug_types, read that type. |
12292 | Don't follow DW_AT_specification though, that will take us back up | |
12293 | the chain and we want to go down. */ | |
45e58e77 | 12294 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
12295 | if (attr) |
12296 | { | |
ac9ec31b | 12297 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 12298 | |
ac9ec31b | 12299 | /* The type's CU may not be the same as CU. |
02142a6c | 12300 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
12301 | return set_die_type (die, type, cu); |
12302 | } | |
12303 | ||
c906108c SS |
12304 | type = alloc_type (objfile); |
12305 | ||
12306 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 12307 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 12308 | if (name != NULL) |
7d455152 | 12309 | TYPE_TAG_NAME (type) = name; |
c906108c | 12310 | |
e142c38c | 12311 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12312 | if (attr) |
12313 | { | |
12314 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12315 | } | |
12316 | else | |
12317 | { | |
12318 | TYPE_LENGTH (type) = 0; | |
12319 | } | |
12320 | ||
137033e9 JB |
12321 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
12322 | declared as private in the package spec, and then defined only | |
12323 | inside the package body. Such types are known as Taft Amendment | |
12324 | Types. When another package uses such a type, an incomplete DIE | |
12325 | may be generated by the compiler. */ | |
02eb380e | 12326 | if (die_is_declaration (die, cu)) |
876cecd0 | 12327 | TYPE_STUB (type) = 1; |
02eb380e | 12328 | |
f792889a | 12329 | return set_die_type (die, type, cu); |
134d01f1 DJ |
12330 | } |
12331 | ||
12332 | /* Given a pointer to a die which begins an enumeration, process all | |
12333 | the dies that define the members of the enumeration, and create the | |
12334 | symbol for the enumeration type. | |
12335 | ||
12336 | NOTE: We reverse the order of the element list. */ | |
12337 | ||
12338 | static void | |
12339 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
12340 | { | |
f792889a | 12341 | struct type *this_type; |
134d01f1 | 12342 | |
f792889a DJ |
12343 | this_type = get_die_type (die, cu); |
12344 | if (this_type == NULL) | |
12345 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 12346 | |
639d11d3 | 12347 | if (die->child != NULL) |
c906108c | 12348 | { |
9dc481d3 DE |
12349 | struct die_info *child_die; |
12350 | struct symbol *sym; | |
12351 | struct field *fields = NULL; | |
12352 | int num_fields = 0; | |
12353 | int unsigned_enum = 1; | |
15d034d0 | 12354 | const char *name; |
cafec441 TT |
12355 | int flag_enum = 1; |
12356 | ULONGEST mask = 0; | |
9dc481d3 | 12357 | |
639d11d3 | 12358 | child_die = die->child; |
c906108c SS |
12359 | while (child_die && child_die->tag) |
12360 | { | |
12361 | if (child_die->tag != DW_TAG_enumerator) | |
12362 | { | |
e7c27a73 | 12363 | process_die (child_die, cu); |
c906108c SS |
12364 | } |
12365 | else | |
12366 | { | |
39cbfefa DJ |
12367 | name = dwarf2_name (child_die, cu); |
12368 | if (name) | |
c906108c | 12369 | { |
f792889a | 12370 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 12371 | if (SYMBOL_VALUE (sym) < 0) |
cafec441 TT |
12372 | { |
12373 | unsigned_enum = 0; | |
12374 | flag_enum = 0; | |
12375 | } | |
12376 | else if ((mask & SYMBOL_VALUE (sym)) != 0) | |
12377 | flag_enum = 0; | |
12378 | else | |
12379 | mask |= SYMBOL_VALUE (sym); | |
c906108c SS |
12380 | |
12381 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
12382 | { | |
12383 | fields = (struct field *) | |
12384 | xrealloc (fields, | |
12385 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 12386 | * sizeof (struct field)); |
c906108c SS |
12387 | } |
12388 | ||
3567439c | 12389 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 12390 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 12391 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
12392 | FIELD_BITSIZE (fields[num_fields]) = 0; |
12393 | ||
12394 | num_fields++; | |
12395 | } | |
12396 | } | |
12397 | ||
12398 | child_die = sibling_die (child_die); | |
12399 | } | |
12400 | ||
12401 | if (num_fields) | |
12402 | { | |
f792889a DJ |
12403 | TYPE_NFIELDS (this_type) = num_fields; |
12404 | TYPE_FIELDS (this_type) = (struct field *) | |
12405 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
12406 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 12407 | sizeof (struct field) * num_fields); |
b8c9b27d | 12408 | xfree (fields); |
c906108c SS |
12409 | } |
12410 | if (unsigned_enum) | |
876cecd0 | 12411 | TYPE_UNSIGNED (this_type) = 1; |
cafec441 TT |
12412 | if (flag_enum) |
12413 | TYPE_FLAG_ENUM (this_type) = 1; | |
c906108c | 12414 | } |
134d01f1 | 12415 | |
6c83ed52 TT |
12416 | /* If we are reading an enum from a .debug_types unit, and the enum |
12417 | is a declaration, and the enum is not the signatured type in the | |
12418 | unit, then we do not want to add a symbol for it. Adding a | |
12419 | symbol would in some cases obscure the true definition of the | |
12420 | enum, giving users an incomplete type when the definition is | |
12421 | actually available. Note that we do not want to do this for all | |
12422 | enums which are just declarations, because C++0x allows forward | |
12423 | enum declarations. */ | |
3019eac3 | 12424 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
12425 | && die_is_declaration (die, cu)) |
12426 | { | |
52dc124a | 12427 | struct signatured_type *sig_type; |
6c83ed52 | 12428 | |
c0f78cd4 | 12429 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
12430 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
12431 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
12432 | return; |
12433 | } | |
12434 | ||
f792889a | 12435 | new_symbol (die, this_type, cu); |
c906108c SS |
12436 | } |
12437 | ||
12438 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
12439 | the DIE's type field. For now, this only handles one dimensional | |
12440 | arrays. */ | |
12441 | ||
f792889a | 12442 | static struct type * |
e7c27a73 | 12443 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12444 | { |
e7c27a73 | 12445 | struct objfile *objfile = cu->objfile; |
c906108c | 12446 | struct die_info *child_die; |
7e314c57 | 12447 | struct type *type; |
c906108c SS |
12448 | struct type *element_type, *range_type, *index_type; |
12449 | struct type **range_types = NULL; | |
12450 | struct attribute *attr; | |
12451 | int ndim = 0; | |
12452 | struct cleanup *back_to; | |
15d034d0 | 12453 | const char *name; |
c906108c | 12454 | |
e7c27a73 | 12455 | element_type = die_type (die, cu); |
c906108c | 12456 | |
7e314c57 JK |
12457 | /* The die_type call above may have already set the type for this DIE. */ |
12458 | type = get_die_type (die, cu); | |
12459 | if (type) | |
12460 | return type; | |
12461 | ||
c906108c SS |
12462 | /* Irix 6.2 native cc creates array types without children for |
12463 | arrays with unspecified length. */ | |
639d11d3 | 12464 | if (die->child == NULL) |
c906108c | 12465 | { |
46bf5051 | 12466 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 12467 | range_type = create_range_type (NULL, index_type, 0, -1); |
f792889a DJ |
12468 | type = create_array_type (NULL, element_type, range_type); |
12469 | return set_die_type (die, type, cu); | |
c906108c SS |
12470 | } |
12471 | ||
12472 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 12473 | child_die = die->child; |
c906108c SS |
12474 | while (child_die && child_die->tag) |
12475 | { | |
12476 | if (child_die->tag == DW_TAG_subrange_type) | |
12477 | { | |
f792889a | 12478 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 12479 | |
f792889a | 12480 | if (child_type != NULL) |
a02abb62 | 12481 | { |
0963b4bd MS |
12482 | /* The range type was succesfully read. Save it for the |
12483 | array type creation. */ | |
a02abb62 JB |
12484 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
12485 | { | |
12486 | range_types = (struct type **) | |
12487 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
12488 | * sizeof (struct type *)); | |
12489 | if (ndim == 0) | |
12490 | make_cleanup (free_current_contents, &range_types); | |
12491 | } | |
f792889a | 12492 | range_types[ndim++] = child_type; |
a02abb62 | 12493 | } |
c906108c SS |
12494 | } |
12495 | child_die = sibling_die (child_die); | |
12496 | } | |
12497 | ||
12498 | /* Dwarf2 dimensions are output from left to right, create the | |
12499 | necessary array types in backwards order. */ | |
7ca2d3a3 | 12500 | |
c906108c | 12501 | type = element_type; |
7ca2d3a3 DL |
12502 | |
12503 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
12504 | { | |
12505 | int i = 0; | |
9a619af0 | 12506 | |
7ca2d3a3 DL |
12507 | while (i < ndim) |
12508 | type = create_array_type (NULL, type, range_types[i++]); | |
12509 | } | |
12510 | else | |
12511 | { | |
12512 | while (ndim-- > 0) | |
12513 | type = create_array_type (NULL, type, range_types[ndim]); | |
12514 | } | |
c906108c | 12515 | |
f5f8a009 EZ |
12516 | /* Understand Dwarf2 support for vector types (like they occur on |
12517 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
12518 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
12519 | custom vendor extension. The main difference between a regular | |
12520 | array and the vector variant is that vectors are passed by value | |
12521 | to functions. */ | |
e142c38c | 12522 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 12523 | if (attr) |
ea37ba09 | 12524 | make_vector_type (type); |
f5f8a009 | 12525 | |
dbc98a8b KW |
12526 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
12527 | implementation may choose to implement triple vectors using this | |
12528 | attribute. */ | |
12529 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
12530 | if (attr) | |
12531 | { | |
12532 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
12533 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12534 | else | |
3e43a32a MS |
12535 | complaint (&symfile_complaints, |
12536 | _("DW_AT_byte_size for array type smaller " | |
12537 | "than the total size of elements")); | |
dbc98a8b KW |
12538 | } |
12539 | ||
39cbfefa DJ |
12540 | name = dwarf2_name (die, cu); |
12541 | if (name) | |
12542 | TYPE_NAME (type) = name; | |
6e70227d | 12543 | |
0963b4bd | 12544 | /* Install the type in the die. */ |
7e314c57 JK |
12545 | set_die_type (die, type, cu); |
12546 | ||
12547 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
12548 | set_descriptive_type (type, die, cu); |
12549 | ||
c906108c SS |
12550 | do_cleanups (back_to); |
12551 | ||
7e314c57 | 12552 | return type; |
c906108c SS |
12553 | } |
12554 | ||
7ca2d3a3 | 12555 | static enum dwarf_array_dim_ordering |
6e70227d | 12556 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
12557 | { |
12558 | struct attribute *attr; | |
12559 | ||
12560 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
12561 | ||
12562 | if (attr) return DW_SND (attr); | |
12563 | ||
0963b4bd MS |
12564 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
12565 | opposite order to the dwarf2 specification, but data is still | |
12566 | laid out as per normal fortran. | |
7ca2d3a3 | 12567 | |
0963b4bd MS |
12568 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
12569 | version checking. */ | |
7ca2d3a3 | 12570 | |
905e0470 PM |
12571 | if (cu->language == language_fortran |
12572 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
12573 | { |
12574 | return DW_ORD_row_major; | |
12575 | } | |
12576 | ||
6e70227d | 12577 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
12578 | { |
12579 | case array_column_major: | |
12580 | return DW_ORD_col_major; | |
12581 | case array_row_major: | |
12582 | default: | |
12583 | return DW_ORD_row_major; | |
12584 | }; | |
12585 | } | |
12586 | ||
72019c9c | 12587 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 12588 | the DIE's type field. */ |
72019c9c | 12589 | |
f792889a | 12590 | static struct type * |
72019c9c GM |
12591 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
12592 | { | |
7e314c57 JK |
12593 | struct type *domain_type, *set_type; |
12594 | struct attribute *attr; | |
f792889a | 12595 | |
7e314c57 JK |
12596 | domain_type = die_type (die, cu); |
12597 | ||
12598 | /* The die_type call above may have already set the type for this DIE. */ | |
12599 | set_type = get_die_type (die, cu); | |
12600 | if (set_type) | |
12601 | return set_type; | |
12602 | ||
12603 | set_type = create_set_type (NULL, domain_type); | |
12604 | ||
12605 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
12606 | if (attr) |
12607 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 12608 | |
f792889a | 12609 | return set_die_type (die, set_type, cu); |
72019c9c | 12610 | } |
7ca2d3a3 | 12611 | |
0971de02 TT |
12612 | /* A helper for read_common_block that creates a locexpr baton. |
12613 | SYM is the symbol which we are marking as computed. | |
12614 | COMMON_DIE is the DIE for the common block. | |
12615 | COMMON_LOC is the location expression attribute for the common | |
12616 | block itself. | |
12617 | MEMBER_LOC is the location expression attribute for the particular | |
12618 | member of the common block that we are processing. | |
12619 | CU is the CU from which the above come. */ | |
12620 | ||
12621 | static void | |
12622 | mark_common_block_symbol_computed (struct symbol *sym, | |
12623 | struct die_info *common_die, | |
12624 | struct attribute *common_loc, | |
12625 | struct attribute *member_loc, | |
12626 | struct dwarf2_cu *cu) | |
12627 | { | |
12628 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12629 | struct dwarf2_locexpr_baton *baton; | |
12630 | gdb_byte *ptr; | |
12631 | unsigned int cu_off; | |
12632 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
12633 | LONGEST offset = 0; | |
12634 | ||
12635 | gdb_assert (common_loc && member_loc); | |
12636 | gdb_assert (attr_form_is_block (common_loc)); | |
12637 | gdb_assert (attr_form_is_block (member_loc) | |
12638 | || attr_form_is_constant (member_loc)); | |
12639 | ||
12640 | baton = obstack_alloc (&objfile->objfile_obstack, | |
12641 | sizeof (struct dwarf2_locexpr_baton)); | |
12642 | baton->per_cu = cu->per_cu; | |
12643 | gdb_assert (baton->per_cu); | |
12644 | ||
12645 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
12646 | ||
12647 | if (attr_form_is_constant (member_loc)) | |
12648 | { | |
12649 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
12650 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
12651 | } | |
12652 | else | |
12653 | baton->size += DW_BLOCK (member_loc)->size; | |
12654 | ||
12655 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
12656 | baton->data = ptr; | |
12657 | ||
12658 | *ptr++ = DW_OP_call4; | |
12659 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
12660 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
12661 | ptr += 4; | |
12662 | ||
12663 | if (attr_form_is_constant (member_loc)) | |
12664 | { | |
12665 | *ptr++ = DW_OP_addr; | |
12666 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
12667 | ptr += cu->header.addr_size; | |
12668 | } | |
12669 | else | |
12670 | { | |
12671 | /* We have to copy the data here, because DW_OP_call4 will only | |
12672 | use a DW_AT_location attribute. */ | |
12673 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
12674 | ptr += DW_BLOCK (member_loc)->size; | |
12675 | } | |
12676 | ||
12677 | *ptr++ = DW_OP_plus; | |
12678 | gdb_assert (ptr - baton->data == baton->size); | |
12679 | ||
0971de02 | 12680 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 12681 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
12682 | } |
12683 | ||
4357ac6c TT |
12684 | /* Create appropriate locally-scoped variables for all the |
12685 | DW_TAG_common_block entries. Also create a struct common_block | |
12686 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
12687 | is used to sepate the common blocks name namespace from regular | |
12688 | variable names. */ | |
c906108c SS |
12689 | |
12690 | static void | |
e7c27a73 | 12691 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12692 | { |
0971de02 TT |
12693 | struct attribute *attr; |
12694 | ||
12695 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
12696 | if (attr) | |
12697 | { | |
12698 | /* Support the .debug_loc offsets. */ | |
12699 | if (attr_form_is_block (attr)) | |
12700 | { | |
12701 | /* Ok. */ | |
12702 | } | |
12703 | else if (attr_form_is_section_offset (attr)) | |
12704 | { | |
12705 | dwarf2_complex_location_expr_complaint (); | |
12706 | attr = NULL; | |
12707 | } | |
12708 | else | |
12709 | { | |
12710 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
12711 | "common block member"); | |
12712 | attr = NULL; | |
12713 | } | |
12714 | } | |
12715 | ||
639d11d3 | 12716 | if (die->child != NULL) |
c906108c | 12717 | { |
4357ac6c TT |
12718 | struct objfile *objfile = cu->objfile; |
12719 | struct die_info *child_die; | |
12720 | size_t n_entries = 0, size; | |
12721 | struct common_block *common_block; | |
12722 | struct symbol *sym; | |
74ac6d43 | 12723 | |
4357ac6c TT |
12724 | for (child_die = die->child; |
12725 | child_die && child_die->tag; | |
12726 | child_die = sibling_die (child_die)) | |
12727 | ++n_entries; | |
12728 | ||
12729 | size = (sizeof (struct common_block) | |
12730 | + (n_entries - 1) * sizeof (struct symbol *)); | |
12731 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
12732 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
12733 | common_block->n_entries = 0; | |
12734 | ||
12735 | for (child_die = die->child; | |
12736 | child_die && child_die->tag; | |
12737 | child_die = sibling_die (child_die)) | |
12738 | { | |
12739 | /* Create the symbol in the DW_TAG_common_block block in the current | |
12740 | symbol scope. */ | |
e7c27a73 | 12741 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
12742 | if (sym != NULL) |
12743 | { | |
12744 | struct attribute *member_loc; | |
12745 | ||
12746 | common_block->contents[common_block->n_entries++] = sym; | |
12747 | ||
12748 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
12749 | cu); | |
12750 | if (member_loc) | |
12751 | { | |
12752 | /* GDB has handled this for a long time, but it is | |
12753 | not specified by DWARF. It seems to have been | |
12754 | emitted by gfortran at least as recently as: | |
12755 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
12756 | complaint (&symfile_complaints, | |
12757 | _("Variable in common block has " | |
12758 | "DW_AT_data_member_location " | |
12759 | "- DIE at 0x%x [in module %s]"), | |
4262abfb JK |
12760 | child_die->offset.sect_off, |
12761 | objfile_name (cu->objfile)); | |
0971de02 TT |
12762 | |
12763 | if (attr_form_is_section_offset (member_loc)) | |
12764 | dwarf2_complex_location_expr_complaint (); | |
12765 | else if (attr_form_is_constant (member_loc) | |
12766 | || attr_form_is_block (member_loc)) | |
12767 | { | |
12768 | if (attr) | |
12769 | mark_common_block_symbol_computed (sym, die, attr, | |
12770 | member_loc, cu); | |
12771 | } | |
12772 | else | |
12773 | dwarf2_complex_location_expr_complaint (); | |
12774 | } | |
12775 | } | |
c906108c | 12776 | } |
4357ac6c TT |
12777 | |
12778 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
12779 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
12780 | } |
12781 | } | |
12782 | ||
0114d602 | 12783 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 12784 | |
0114d602 DJ |
12785 | static struct type * |
12786 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 12787 | { |
e7c27a73 | 12788 | struct objfile *objfile = cu->objfile; |
0114d602 | 12789 | const char *previous_prefix, *name; |
9219021c | 12790 | int is_anonymous; |
0114d602 DJ |
12791 | struct type *type; |
12792 | ||
12793 | /* For extensions, reuse the type of the original namespace. */ | |
12794 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
12795 | { | |
12796 | struct die_info *ext_die; | |
12797 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 12798 | |
0114d602 DJ |
12799 | ext_die = dwarf2_extension (die, &ext_cu); |
12800 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
12801 | |
12802 | /* EXT_CU may not be the same as CU. | |
02142a6c | 12803 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
12804 | return set_die_type (die, type, cu); |
12805 | } | |
9219021c | 12806 | |
e142c38c | 12807 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
12808 | |
12809 | /* Now build the name of the current namespace. */ | |
12810 | ||
0114d602 DJ |
12811 | previous_prefix = determine_prefix (die, cu); |
12812 | if (previous_prefix[0] != '\0') | |
12813 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 12814 | previous_prefix, name, 0, cu); |
0114d602 DJ |
12815 | |
12816 | /* Create the type. */ | |
12817 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
12818 | objfile); | |
abee88f2 | 12819 | TYPE_NAME (type) = name; |
0114d602 DJ |
12820 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
12821 | ||
60531b24 | 12822 | return set_die_type (die, type, cu); |
0114d602 DJ |
12823 | } |
12824 | ||
12825 | /* Read a C++ namespace. */ | |
12826 | ||
12827 | static void | |
12828 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
12829 | { | |
12830 | struct objfile *objfile = cu->objfile; | |
0114d602 | 12831 | int is_anonymous; |
9219021c | 12832 | |
5c4e30ca DC |
12833 | /* Add a symbol associated to this if we haven't seen the namespace |
12834 | before. Also, add a using directive if it's an anonymous | |
12835 | namespace. */ | |
9219021c | 12836 | |
f2f0e013 | 12837 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
12838 | { |
12839 | struct type *type; | |
12840 | ||
0114d602 | 12841 | type = read_type_die (die, cu); |
e7c27a73 | 12842 | new_symbol (die, type, cu); |
5c4e30ca | 12843 | |
e8e80198 | 12844 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 12845 | if (is_anonymous) |
0114d602 DJ |
12846 | { |
12847 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 12848 | |
c0cc3a76 | 12849 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
12aaed36 | 12850 | NULL, NULL, 0, &objfile->objfile_obstack); |
0114d602 | 12851 | } |
5c4e30ca | 12852 | } |
9219021c | 12853 | |
639d11d3 | 12854 | if (die->child != NULL) |
d9fa45fe | 12855 | { |
639d11d3 | 12856 | struct die_info *child_die = die->child; |
6e70227d | 12857 | |
d9fa45fe DC |
12858 | while (child_die && child_die->tag) |
12859 | { | |
e7c27a73 | 12860 | process_die (child_die, cu); |
d9fa45fe DC |
12861 | child_die = sibling_die (child_die); |
12862 | } | |
12863 | } | |
38d518c9 EZ |
12864 | } |
12865 | ||
f55ee35c JK |
12866 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
12867 | imported module. Still we need that type as local Fortran "use ... only" | |
12868 | declaration imports depend on the created type in determine_prefix. */ | |
12869 | ||
12870 | static struct type * | |
12871 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
12872 | { | |
12873 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 12874 | const char *module_name; |
f55ee35c JK |
12875 | struct type *type; |
12876 | ||
12877 | module_name = dwarf2_name (die, cu); | |
12878 | if (!module_name) | |
3e43a32a MS |
12879 | complaint (&symfile_complaints, |
12880 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 12881 | die->offset.sect_off); |
f55ee35c JK |
12882 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
12883 | ||
12884 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
12885 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
12886 | ||
12887 | return set_die_type (die, type, cu); | |
12888 | } | |
12889 | ||
5d7cb8df JK |
12890 | /* Read a Fortran module. */ |
12891 | ||
12892 | static void | |
12893 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
12894 | { | |
12895 | struct die_info *child_die = die->child; | |
12896 | ||
5d7cb8df JK |
12897 | while (child_die && child_die->tag) |
12898 | { | |
12899 | process_die (child_die, cu); | |
12900 | child_die = sibling_die (child_die); | |
12901 | } | |
12902 | } | |
12903 | ||
38d518c9 EZ |
12904 | /* Return the name of the namespace represented by DIE. Set |
12905 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
12906 | namespace. */ | |
12907 | ||
12908 | static const char * | |
e142c38c | 12909 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
12910 | { |
12911 | struct die_info *current_die; | |
12912 | const char *name = NULL; | |
12913 | ||
12914 | /* Loop through the extensions until we find a name. */ | |
12915 | ||
12916 | for (current_die = die; | |
12917 | current_die != NULL; | |
f2f0e013 | 12918 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 12919 | { |
e142c38c | 12920 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
12921 | if (name != NULL) |
12922 | break; | |
12923 | } | |
12924 | ||
12925 | /* Is it an anonymous namespace? */ | |
12926 | ||
12927 | *is_anonymous = (name == NULL); | |
12928 | if (*is_anonymous) | |
2b1dbab0 | 12929 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
12930 | |
12931 | return name; | |
d9fa45fe DC |
12932 | } |
12933 | ||
c906108c SS |
12934 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
12935 | the user defined type vector. */ | |
12936 | ||
f792889a | 12937 | static struct type * |
e7c27a73 | 12938 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12939 | { |
5e2b427d | 12940 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 12941 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 12942 | struct type *type; |
8b2dbe47 KB |
12943 | struct attribute *attr_byte_size; |
12944 | struct attribute *attr_address_class; | |
12945 | int byte_size, addr_class; | |
7e314c57 JK |
12946 | struct type *target_type; |
12947 | ||
12948 | target_type = die_type (die, cu); | |
c906108c | 12949 | |
7e314c57 JK |
12950 | /* The die_type call above may have already set the type for this DIE. */ |
12951 | type = get_die_type (die, cu); | |
12952 | if (type) | |
12953 | return type; | |
12954 | ||
12955 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 12956 | |
e142c38c | 12957 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
12958 | if (attr_byte_size) |
12959 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 12960 | else |
8b2dbe47 KB |
12961 | byte_size = cu_header->addr_size; |
12962 | ||
e142c38c | 12963 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
12964 | if (attr_address_class) |
12965 | addr_class = DW_UNSND (attr_address_class); | |
12966 | else | |
12967 | addr_class = DW_ADDR_none; | |
12968 | ||
12969 | /* If the pointer size or address class is different than the | |
12970 | default, create a type variant marked as such and set the | |
12971 | length accordingly. */ | |
12972 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 12973 | { |
5e2b427d | 12974 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
12975 | { |
12976 | int type_flags; | |
12977 | ||
849957d9 | 12978 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 12979 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
12980 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
12981 | == 0); | |
8b2dbe47 KB |
12982 | type = make_type_with_address_space (type, type_flags); |
12983 | } | |
12984 | else if (TYPE_LENGTH (type) != byte_size) | |
12985 | { | |
3e43a32a MS |
12986 | complaint (&symfile_complaints, |
12987 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 12988 | } |
6e70227d | 12989 | else |
9a619af0 MS |
12990 | { |
12991 | /* Should we also complain about unhandled address classes? */ | |
12992 | } | |
c906108c | 12993 | } |
8b2dbe47 KB |
12994 | |
12995 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 12996 | return set_die_type (die, type, cu); |
c906108c SS |
12997 | } |
12998 | ||
12999 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
13000 | the user defined type vector. */ | |
13001 | ||
f792889a | 13002 | static struct type * |
e7c27a73 | 13003 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
13004 | { |
13005 | struct type *type; | |
13006 | struct type *to_type; | |
13007 | struct type *domain; | |
13008 | ||
e7c27a73 DJ |
13009 | to_type = die_type (die, cu); |
13010 | domain = die_containing_type (die, cu); | |
0d5de010 | 13011 | |
7e314c57 JK |
13012 | /* The calls above may have already set the type for this DIE. */ |
13013 | type = get_die_type (die, cu); | |
13014 | if (type) | |
13015 | return type; | |
13016 | ||
0d5de010 DJ |
13017 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
13018 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
13019 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
13020 | { | |
13021 | struct type *new_type = alloc_type (cu->objfile); | |
13022 | ||
13023 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
13024 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
13025 | TYPE_VARARGS (to_type)); | |
13026 | type = lookup_methodptr_type (new_type); | |
13027 | } | |
0d5de010 DJ |
13028 | else |
13029 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 13030 | |
f792889a | 13031 | return set_die_type (die, type, cu); |
c906108c SS |
13032 | } |
13033 | ||
13034 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
13035 | the user defined type vector. */ | |
13036 | ||
f792889a | 13037 | static struct type * |
e7c27a73 | 13038 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13039 | { |
e7c27a73 | 13040 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 13041 | struct type *type, *target_type; |
c906108c SS |
13042 | struct attribute *attr; |
13043 | ||
7e314c57 JK |
13044 | target_type = die_type (die, cu); |
13045 | ||
13046 | /* The die_type call above may have already set the type for this DIE. */ | |
13047 | type = get_die_type (die, cu); | |
13048 | if (type) | |
13049 | return type; | |
13050 | ||
13051 | type = lookup_reference_type (target_type); | |
e142c38c | 13052 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13053 | if (attr) |
13054 | { | |
13055 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
13056 | } | |
13057 | else | |
13058 | { | |
107d2387 | 13059 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 13060 | } |
f792889a | 13061 | return set_die_type (die, type, cu); |
c906108c SS |
13062 | } |
13063 | ||
f792889a | 13064 | static struct type * |
e7c27a73 | 13065 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13066 | { |
f792889a | 13067 | struct type *base_type, *cv_type; |
c906108c | 13068 | |
e7c27a73 | 13069 | base_type = die_type (die, cu); |
7e314c57 JK |
13070 | |
13071 | /* The die_type call above may have already set the type for this DIE. */ | |
13072 | cv_type = get_die_type (die, cu); | |
13073 | if (cv_type) | |
13074 | return cv_type; | |
13075 | ||
2f608a3a KW |
13076 | /* In case the const qualifier is applied to an array type, the element type |
13077 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
13078 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
13079 | { | |
13080 | struct type *el_type, *inner_array; | |
13081 | ||
13082 | base_type = copy_type (base_type); | |
13083 | inner_array = base_type; | |
13084 | ||
13085 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
13086 | { | |
13087 | TYPE_TARGET_TYPE (inner_array) = | |
13088 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
13089 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
13090 | } | |
13091 | ||
13092 | el_type = TYPE_TARGET_TYPE (inner_array); | |
13093 | TYPE_TARGET_TYPE (inner_array) = | |
13094 | make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL); | |
13095 | ||
13096 | return set_die_type (die, base_type, cu); | |
13097 | } | |
13098 | ||
f792889a DJ |
13099 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
13100 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
13101 | } |
13102 | ||
f792889a | 13103 | static struct type * |
e7c27a73 | 13104 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13105 | { |
f792889a | 13106 | struct type *base_type, *cv_type; |
c906108c | 13107 | |
e7c27a73 | 13108 | base_type = die_type (die, cu); |
7e314c57 JK |
13109 | |
13110 | /* The die_type call above may have already set the type for this DIE. */ | |
13111 | cv_type = get_die_type (die, cu); | |
13112 | if (cv_type) | |
13113 | return cv_type; | |
13114 | ||
f792889a DJ |
13115 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
13116 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
13117 | } |
13118 | ||
06d66ee9 TT |
13119 | /* Handle DW_TAG_restrict_type. */ |
13120 | ||
13121 | static struct type * | |
13122 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
13123 | { | |
13124 | struct type *base_type, *cv_type; | |
13125 | ||
13126 | base_type = die_type (die, cu); | |
13127 | ||
13128 | /* The die_type call above may have already set the type for this DIE. */ | |
13129 | cv_type = get_die_type (die, cu); | |
13130 | if (cv_type) | |
13131 | return cv_type; | |
13132 | ||
13133 | cv_type = make_restrict_type (base_type); | |
13134 | return set_die_type (die, cv_type, cu); | |
13135 | } | |
13136 | ||
c906108c SS |
13137 | /* Extract all information from a DW_TAG_string_type DIE and add to |
13138 | the user defined type vector. It isn't really a user defined type, | |
13139 | but it behaves like one, with other DIE's using an AT_user_def_type | |
13140 | attribute to reference it. */ | |
13141 | ||
f792889a | 13142 | static struct type * |
e7c27a73 | 13143 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13144 | { |
e7c27a73 | 13145 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 13146 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13147 | struct type *type, *range_type, *index_type, *char_type; |
13148 | struct attribute *attr; | |
13149 | unsigned int length; | |
13150 | ||
e142c38c | 13151 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
13152 | if (attr) |
13153 | { | |
13154 | length = DW_UNSND (attr); | |
13155 | } | |
13156 | else | |
13157 | { | |
0963b4bd | 13158 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 13159 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
13160 | if (attr) |
13161 | { | |
13162 | length = DW_UNSND (attr); | |
13163 | } | |
13164 | else | |
13165 | { | |
13166 | length = 1; | |
13167 | } | |
c906108c | 13168 | } |
6ccb9162 | 13169 | |
46bf5051 | 13170 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 13171 | range_type = create_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
13172 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
13173 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 13174 | |
f792889a | 13175 | return set_die_type (die, type, cu); |
c906108c SS |
13176 | } |
13177 | ||
4d804846 JB |
13178 | /* Assuming that DIE corresponds to a function, returns nonzero |
13179 | if the function is prototyped. */ | |
13180 | ||
13181 | static int | |
13182 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
13183 | { | |
13184 | struct attribute *attr; | |
13185 | ||
13186 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
13187 | if (attr && (DW_UNSND (attr) != 0)) | |
13188 | return 1; | |
13189 | ||
13190 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
13191 | is only meaninful for C, but the concept also extends to other | |
13192 | languages that allow unprototyped functions (Eg: Objective C). | |
13193 | For all other languages, assume that functions are always | |
13194 | prototyped. */ | |
13195 | if (cu->language != language_c | |
13196 | && cu->language != language_objc | |
13197 | && cu->language != language_opencl) | |
13198 | return 1; | |
13199 | ||
13200 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
13201 | prototyped and unprototyped functions; default to prototyped, | |
13202 | since that is more common in modern code (and RealView warns | |
13203 | about unprototyped functions). */ | |
13204 | if (producer_is_realview (cu->producer)) | |
13205 | return 1; | |
13206 | ||
13207 | return 0; | |
13208 | } | |
13209 | ||
c906108c SS |
13210 | /* Handle DIES due to C code like: |
13211 | ||
13212 | struct foo | |
c5aa993b JM |
13213 | { |
13214 | int (*funcp)(int a, long l); | |
13215 | int b; | |
13216 | }; | |
c906108c | 13217 | |
0963b4bd | 13218 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 13219 | |
f792889a | 13220 | static struct type * |
e7c27a73 | 13221 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13222 | { |
bb5ed363 | 13223 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
13224 | struct type *type; /* Type that this function returns. */ |
13225 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
13226 | struct attribute *attr; |
13227 | ||
e7c27a73 | 13228 | type = die_type (die, cu); |
7e314c57 JK |
13229 | |
13230 | /* The die_type call above may have already set the type for this DIE. */ | |
13231 | ftype = get_die_type (die, cu); | |
13232 | if (ftype) | |
13233 | return ftype; | |
13234 | ||
0c8b41f1 | 13235 | ftype = lookup_function_type (type); |
c906108c | 13236 | |
4d804846 | 13237 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 13238 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 13239 | |
c055b101 CV |
13240 | /* Store the calling convention in the type if it's available in |
13241 | the subroutine die. Otherwise set the calling convention to | |
13242 | the default value DW_CC_normal. */ | |
13243 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
13244 | if (attr) |
13245 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
13246 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
13247 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
13248 | else | |
13249 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
13250 | |
13251 | /* We need to add the subroutine type to the die immediately so | |
13252 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 13253 | declared as the same subroutine type. */ |
76c10ea2 | 13254 | set_die_type (die, ftype, cu); |
6e70227d | 13255 | |
639d11d3 | 13256 | if (die->child != NULL) |
c906108c | 13257 | { |
bb5ed363 | 13258 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 13259 | struct die_info *child_die; |
8072405b | 13260 | int nparams, iparams; |
c906108c SS |
13261 | |
13262 | /* Count the number of parameters. | |
13263 | FIXME: GDB currently ignores vararg functions, but knows about | |
13264 | vararg member functions. */ | |
8072405b | 13265 | nparams = 0; |
639d11d3 | 13266 | child_die = die->child; |
c906108c SS |
13267 | while (child_die && child_die->tag) |
13268 | { | |
13269 | if (child_die->tag == DW_TAG_formal_parameter) | |
13270 | nparams++; | |
13271 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 13272 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
13273 | child_die = sibling_die (child_die); |
13274 | } | |
13275 | ||
13276 | /* Allocate storage for parameters and fill them in. */ | |
13277 | TYPE_NFIELDS (ftype) = nparams; | |
13278 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 13279 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 13280 | |
8072405b JK |
13281 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
13282 | even if we error out during the parameters reading below. */ | |
13283 | for (iparams = 0; iparams < nparams; iparams++) | |
13284 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
13285 | ||
13286 | iparams = 0; | |
639d11d3 | 13287 | child_die = die->child; |
c906108c SS |
13288 | while (child_die && child_die->tag) |
13289 | { | |
13290 | if (child_die->tag == DW_TAG_formal_parameter) | |
13291 | { | |
3ce3b1ba PA |
13292 | struct type *arg_type; |
13293 | ||
13294 | /* DWARF version 2 has no clean way to discern C++ | |
13295 | static and non-static member functions. G++ helps | |
13296 | GDB by marking the first parameter for non-static | |
13297 | member functions (which is the this pointer) as | |
13298 | artificial. We pass this information to | |
13299 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
13300 | ||
13301 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
13302 | 4.5 does not yet generate. */ | |
e142c38c | 13303 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
13304 | if (attr) |
13305 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
13306 | else | |
418835cc KS |
13307 | { |
13308 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
13309 | ||
13310 | /* GCC/43521: In java, the formal parameter | |
13311 | "this" is sometimes not marked with DW_AT_artificial. */ | |
13312 | if (cu->language == language_java) | |
13313 | { | |
13314 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 13315 | |
418835cc KS |
13316 | if (name && !strcmp (name, "this")) |
13317 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
13318 | } | |
13319 | } | |
3ce3b1ba PA |
13320 | arg_type = die_type (child_die, cu); |
13321 | ||
13322 | /* RealView does not mark THIS as const, which the testsuite | |
13323 | expects. GCC marks THIS as const in method definitions, | |
13324 | but not in the class specifications (GCC PR 43053). */ | |
13325 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
13326 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
13327 | { | |
13328 | int is_this = 0; | |
13329 | struct dwarf2_cu *arg_cu = cu; | |
13330 | const char *name = dwarf2_name (child_die, cu); | |
13331 | ||
13332 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
13333 | if (attr) | |
13334 | { | |
13335 | /* If the compiler emits this, use it. */ | |
13336 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
13337 | is_this = 1; | |
13338 | } | |
13339 | else if (name && strcmp (name, "this") == 0) | |
13340 | /* Function definitions will have the argument names. */ | |
13341 | is_this = 1; | |
13342 | else if (name == NULL && iparams == 0) | |
13343 | /* Declarations may not have the names, so like | |
13344 | elsewhere in GDB, assume an artificial first | |
13345 | argument is "this". */ | |
13346 | is_this = 1; | |
13347 | ||
13348 | if (is_this) | |
13349 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
13350 | arg_type, 0); | |
13351 | } | |
13352 | ||
13353 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
13354 | iparams++; |
13355 | } | |
13356 | child_die = sibling_die (child_die); | |
13357 | } | |
13358 | } | |
13359 | ||
76c10ea2 | 13360 | return ftype; |
c906108c SS |
13361 | } |
13362 | ||
f792889a | 13363 | static struct type * |
e7c27a73 | 13364 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13365 | { |
e7c27a73 | 13366 | struct objfile *objfile = cu->objfile; |
0114d602 | 13367 | const char *name = NULL; |
3c8e0968 | 13368 | struct type *this_type, *target_type; |
c906108c | 13369 | |
94af9270 | 13370 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 13371 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 13372 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 13373 | TYPE_NAME (this_type) = name; |
f792889a | 13374 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
13375 | target_type = die_type (die, cu); |
13376 | if (target_type != this_type) | |
13377 | TYPE_TARGET_TYPE (this_type) = target_type; | |
13378 | else | |
13379 | { | |
13380 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
13381 | spec and cause infinite loops in GDB. */ | |
13382 | complaint (&symfile_complaints, | |
13383 | _("Self-referential DW_TAG_typedef " | |
13384 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 13385 | die->offset.sect_off, objfile_name (objfile)); |
3c8e0968 DE |
13386 | TYPE_TARGET_TYPE (this_type) = NULL; |
13387 | } | |
f792889a | 13388 | return this_type; |
c906108c SS |
13389 | } |
13390 | ||
13391 | /* Find a representation of a given base type and install | |
13392 | it in the TYPE field of the die. */ | |
13393 | ||
f792889a | 13394 | static struct type * |
e7c27a73 | 13395 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13396 | { |
e7c27a73 | 13397 | struct objfile *objfile = cu->objfile; |
c906108c SS |
13398 | struct type *type; |
13399 | struct attribute *attr; | |
13400 | int encoding = 0, size = 0; | |
15d034d0 | 13401 | const char *name; |
6ccb9162 UW |
13402 | enum type_code code = TYPE_CODE_INT; |
13403 | int type_flags = 0; | |
13404 | struct type *target_type = NULL; | |
c906108c | 13405 | |
e142c38c | 13406 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
13407 | if (attr) |
13408 | { | |
13409 | encoding = DW_UNSND (attr); | |
13410 | } | |
e142c38c | 13411 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
13412 | if (attr) |
13413 | { | |
13414 | size = DW_UNSND (attr); | |
13415 | } | |
39cbfefa | 13416 | name = dwarf2_name (die, cu); |
6ccb9162 | 13417 | if (!name) |
c906108c | 13418 | { |
6ccb9162 UW |
13419 | complaint (&symfile_complaints, |
13420 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 13421 | } |
6ccb9162 UW |
13422 | |
13423 | switch (encoding) | |
c906108c | 13424 | { |
6ccb9162 UW |
13425 | case DW_ATE_address: |
13426 | /* Turn DW_ATE_address into a void * pointer. */ | |
13427 | code = TYPE_CODE_PTR; | |
13428 | type_flags |= TYPE_FLAG_UNSIGNED; | |
13429 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
13430 | break; | |
13431 | case DW_ATE_boolean: | |
13432 | code = TYPE_CODE_BOOL; | |
13433 | type_flags |= TYPE_FLAG_UNSIGNED; | |
13434 | break; | |
13435 | case DW_ATE_complex_float: | |
13436 | code = TYPE_CODE_COMPLEX; | |
13437 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
13438 | break; | |
13439 | case DW_ATE_decimal_float: | |
13440 | code = TYPE_CODE_DECFLOAT; | |
13441 | break; | |
13442 | case DW_ATE_float: | |
13443 | code = TYPE_CODE_FLT; | |
13444 | break; | |
13445 | case DW_ATE_signed: | |
13446 | break; | |
13447 | case DW_ATE_unsigned: | |
13448 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
13449 | if (cu->language == language_fortran |
13450 | && name | |
13451 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
13452 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
13453 | break; |
13454 | case DW_ATE_signed_char: | |
6e70227d | 13455 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
13456 | || cu->language == language_pascal |
13457 | || cu->language == language_fortran) | |
6ccb9162 UW |
13458 | code = TYPE_CODE_CHAR; |
13459 | break; | |
13460 | case DW_ATE_unsigned_char: | |
868a0084 | 13461 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
13462 | || cu->language == language_pascal |
13463 | || cu->language == language_fortran) | |
6ccb9162 UW |
13464 | code = TYPE_CODE_CHAR; |
13465 | type_flags |= TYPE_FLAG_UNSIGNED; | |
13466 | break; | |
75079b2b TT |
13467 | case DW_ATE_UTF: |
13468 | /* We just treat this as an integer and then recognize the | |
13469 | type by name elsewhere. */ | |
13470 | break; | |
13471 | ||
6ccb9162 UW |
13472 | default: |
13473 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
13474 | dwarf_type_encoding_name (encoding)); | |
13475 | break; | |
c906108c | 13476 | } |
6ccb9162 | 13477 | |
0114d602 DJ |
13478 | type = init_type (code, size, type_flags, NULL, objfile); |
13479 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
13480 | TYPE_TARGET_TYPE (type) = target_type; |
13481 | ||
0114d602 | 13482 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 13483 | TYPE_NOSIGN (type) = 1; |
0114d602 | 13484 | |
f792889a | 13485 | return set_die_type (die, type, cu); |
c906108c SS |
13486 | } |
13487 | ||
a02abb62 JB |
13488 | /* Read the given DW_AT_subrange DIE. */ |
13489 | ||
f792889a | 13490 | static struct type * |
a02abb62 JB |
13491 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
13492 | { | |
4c9ad8c2 | 13493 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
13494 | struct type *range_type; |
13495 | struct attribute *attr; | |
4fae6e18 JK |
13496 | LONGEST low, high; |
13497 | int low_default_is_valid; | |
15d034d0 | 13498 | const char *name; |
43bbcdc2 | 13499 | LONGEST negative_mask; |
e77813c8 | 13500 | |
4c9ad8c2 TT |
13501 | orig_base_type = die_type (die, cu); |
13502 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
13503 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
13504 | creating the range type, but we use the result of check_typedef | |
13505 | when examining properties of the type. */ | |
13506 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 13507 | |
7e314c57 JK |
13508 | /* The die_type call above may have already set the type for this DIE. */ |
13509 | range_type = get_die_type (die, cu); | |
13510 | if (range_type) | |
13511 | return range_type; | |
13512 | ||
4fae6e18 JK |
13513 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
13514 | omitting DW_AT_lower_bound. */ | |
13515 | switch (cu->language) | |
6e70227d | 13516 | { |
4fae6e18 JK |
13517 | case language_c: |
13518 | case language_cplus: | |
13519 | low = 0; | |
13520 | low_default_is_valid = 1; | |
13521 | break; | |
13522 | case language_fortran: | |
13523 | low = 1; | |
13524 | low_default_is_valid = 1; | |
13525 | break; | |
13526 | case language_d: | |
13527 | case language_java: | |
13528 | case language_objc: | |
13529 | low = 0; | |
13530 | low_default_is_valid = (cu->header.version >= 4); | |
13531 | break; | |
13532 | case language_ada: | |
13533 | case language_m2: | |
13534 | case language_pascal: | |
a02abb62 | 13535 | low = 1; |
4fae6e18 JK |
13536 | low_default_is_valid = (cu->header.version >= 4); |
13537 | break; | |
13538 | default: | |
13539 | low = 0; | |
13540 | low_default_is_valid = 0; | |
13541 | break; | |
a02abb62 JB |
13542 | } |
13543 | ||
dd5e6932 DJ |
13544 | /* FIXME: For variable sized arrays either of these could be |
13545 | a variable rather than a constant value. We'll allow it, | |
13546 | but we don't know how to handle it. */ | |
e142c38c | 13547 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 13548 | if (attr) |
4fae6e18 JK |
13549 | low = dwarf2_get_attr_constant_value (attr, low); |
13550 | else if (!low_default_is_valid) | |
13551 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
13552 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 13553 | die->offset.sect_off, objfile_name (cu->objfile)); |
a02abb62 | 13554 | |
e142c38c | 13555 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
a02abb62 | 13556 | if (attr) |
6e70227d | 13557 | { |
7771576e | 13558 | if (attr_form_is_block (attr) || attr_form_is_ref (attr)) |
a02abb62 JB |
13559 | { |
13560 | /* GCC encodes arrays with unspecified or dynamic length | |
e77813c8 | 13561 | with a DW_FORM_block1 attribute or a reference attribute. |
a02abb62 JB |
13562 | FIXME: GDB does not yet know how to handle dynamic |
13563 | arrays properly, treat them as arrays with unspecified | |
13564 | length for now. | |
13565 | ||
13566 | FIXME: jimb/2003-09-22: GDB does not really know | |
13567 | how to handle arrays of unspecified length | |
13568 | either; we just represent them as zero-length | |
13569 | arrays. Choose an appropriate upper bound given | |
13570 | the lower bound we've computed above. */ | |
13571 | high = low - 1; | |
13572 | } | |
13573 | else | |
13574 | high = dwarf2_get_attr_constant_value (attr, 1); | |
13575 | } | |
e77813c8 PM |
13576 | else |
13577 | { | |
13578 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
13579 | if (attr) | |
13580 | { | |
13581 | int count = dwarf2_get_attr_constant_value (attr, 1); | |
13582 | high = low + count - 1; | |
13583 | } | |
c2ff108b JK |
13584 | else |
13585 | { | |
13586 | /* Unspecified array length. */ | |
13587 | high = low - 1; | |
13588 | } | |
e77813c8 PM |
13589 | } |
13590 | ||
13591 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
13592 | without specifying a base type. | |
13593 | In that case, the base type must be set to the type of | |
13594 | the lower bound, upper bound or count, in that order, if any of these | |
13595 | three attributes references an object that has a type. | |
13596 | If no base type is found, the Dwarf-2 specifications say that | |
13597 | a signed integer type of size equal to the size of an address should | |
13598 | be used. | |
13599 | For the following C code: `extern char gdb_int [];' | |
13600 | GCC produces an empty range DIE. | |
13601 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 13602 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
13603 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
13604 | { | |
13605 | struct objfile *objfile = cu->objfile; | |
13606 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13607 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
13608 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
13609 | ||
13610 | /* Test "int", "long int", and "long long int" objfile types, | |
13611 | and select the first one having a size above or equal to the | |
13612 | architecture address size. */ | |
13613 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13614 | base_type = int_type; | |
13615 | else | |
13616 | { | |
13617 | int_type = objfile_type (objfile)->builtin_long; | |
13618 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13619 | base_type = int_type; | |
13620 | else | |
13621 | { | |
13622 | int_type = objfile_type (objfile)->builtin_long_long; | |
13623 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13624 | base_type = int_type; | |
13625 | } | |
13626 | } | |
13627 | } | |
a02abb62 | 13628 | |
6e70227d | 13629 | negative_mask = |
43bbcdc2 PH |
13630 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
13631 | if (!TYPE_UNSIGNED (base_type) && (low & negative_mask)) | |
13632 | low |= negative_mask; | |
13633 | if (!TYPE_UNSIGNED (base_type) && (high & negative_mask)) | |
13634 | high |= negative_mask; | |
13635 | ||
4c9ad8c2 | 13636 | range_type = create_range_type (NULL, orig_base_type, low, high); |
a02abb62 | 13637 | |
bbb0eef6 JK |
13638 | /* Mark arrays with dynamic length at least as an array of unspecified |
13639 | length. GDB could check the boundary but before it gets implemented at | |
13640 | least allow accessing the array elements. */ | |
d48323d8 | 13641 | if (attr && attr_form_is_block (attr)) |
bbb0eef6 JK |
13642 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; |
13643 | ||
c2ff108b JK |
13644 | /* Ada expects an empty array on no boundary attributes. */ |
13645 | if (attr == NULL && cu->language != language_ada) | |
13646 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; | |
13647 | ||
39cbfefa DJ |
13648 | name = dwarf2_name (die, cu); |
13649 | if (name) | |
13650 | TYPE_NAME (range_type) = name; | |
6e70227d | 13651 | |
e142c38c | 13652 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
13653 | if (attr) |
13654 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
13655 | ||
7e314c57 JK |
13656 | set_die_type (die, range_type, cu); |
13657 | ||
13658 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13659 | set_descriptive_type (range_type, die, cu); |
13660 | ||
7e314c57 | 13661 | return range_type; |
a02abb62 | 13662 | } |
6e70227d | 13663 | |
f792889a | 13664 | static struct type * |
81a17f79 JB |
13665 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
13666 | { | |
13667 | struct type *type; | |
81a17f79 | 13668 | |
81a17f79 JB |
13669 | /* For now, we only support the C meaning of an unspecified type: void. */ |
13670 | ||
0114d602 DJ |
13671 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
13672 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 13673 | |
f792889a | 13674 | return set_die_type (die, type, cu); |
81a17f79 | 13675 | } |
a02abb62 | 13676 | |
639d11d3 DC |
13677 | /* Read a single die and all its descendents. Set the die's sibling |
13678 | field to NULL; set other fields in the die correctly, and set all | |
13679 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
13680 | location of the info_ptr after reading all of those dies. PARENT | |
13681 | is the parent of the die in question. */ | |
13682 | ||
13683 | static struct die_info * | |
dee91e82 | 13684 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
13685 | const gdb_byte *info_ptr, |
13686 | const gdb_byte **new_info_ptr, | |
dee91e82 | 13687 | struct die_info *parent) |
639d11d3 DC |
13688 | { |
13689 | struct die_info *die; | |
d521ce57 | 13690 | const gdb_byte *cur_ptr; |
639d11d3 DC |
13691 | int has_children; |
13692 | ||
bf6af496 | 13693 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
13694 | if (die == NULL) |
13695 | { | |
13696 | *new_info_ptr = cur_ptr; | |
13697 | return NULL; | |
13698 | } | |
93311388 | 13699 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
13700 | |
13701 | if (has_children) | |
bf6af496 | 13702 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
13703 | else |
13704 | { | |
13705 | die->child = NULL; | |
13706 | *new_info_ptr = cur_ptr; | |
13707 | } | |
13708 | ||
13709 | die->sibling = NULL; | |
13710 | die->parent = parent; | |
13711 | return die; | |
13712 | } | |
13713 | ||
13714 | /* Read a die, all of its descendents, and all of its siblings; set | |
13715 | all of the fields of all of the dies correctly. Arguments are as | |
13716 | in read_die_and_children. */ | |
13717 | ||
13718 | static struct die_info * | |
bf6af496 | 13719 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
13720 | const gdb_byte *info_ptr, |
13721 | const gdb_byte **new_info_ptr, | |
bf6af496 | 13722 | struct die_info *parent) |
639d11d3 DC |
13723 | { |
13724 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 13725 | const gdb_byte *cur_ptr; |
639d11d3 | 13726 | |
c906108c | 13727 | cur_ptr = info_ptr; |
639d11d3 DC |
13728 | first_die = last_sibling = NULL; |
13729 | ||
13730 | while (1) | |
c906108c | 13731 | { |
639d11d3 | 13732 | struct die_info *die |
dee91e82 | 13733 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 13734 | |
1d325ec1 | 13735 | if (die == NULL) |
c906108c | 13736 | { |
639d11d3 DC |
13737 | *new_info_ptr = cur_ptr; |
13738 | return first_die; | |
c906108c | 13739 | } |
1d325ec1 DJ |
13740 | |
13741 | if (!first_die) | |
13742 | first_die = die; | |
c906108c | 13743 | else |
1d325ec1 DJ |
13744 | last_sibling->sibling = die; |
13745 | ||
13746 | last_sibling = die; | |
c906108c | 13747 | } |
c906108c SS |
13748 | } |
13749 | ||
bf6af496 DE |
13750 | /* Read a die, all of its descendents, and all of its siblings; set |
13751 | all of the fields of all of the dies correctly. Arguments are as | |
13752 | in read_die_and_children. | |
13753 | This the main entry point for reading a DIE and all its children. */ | |
13754 | ||
13755 | static struct die_info * | |
13756 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
13757 | const gdb_byte *info_ptr, |
13758 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
13759 | struct die_info *parent) |
13760 | { | |
13761 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
13762 | new_info_ptr, parent); | |
13763 | ||
13764 | if (dwarf2_die_debug) | |
13765 | { | |
13766 | fprintf_unfiltered (gdb_stdlog, | |
13767 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 13768 | get_section_name (reader->die_section), |
bf6af496 DE |
13769 | (unsigned) (info_ptr - reader->die_section->buffer), |
13770 | bfd_get_filename (reader->abfd)); | |
13771 | dump_die (die, dwarf2_die_debug); | |
13772 | } | |
13773 | ||
13774 | return die; | |
13775 | } | |
13776 | ||
3019eac3 DE |
13777 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
13778 | attributes. | |
13779 | The caller is responsible for filling in the extra attributes | |
13780 | and updating (*DIEP)->num_attrs. | |
13781 | Set DIEP to point to a newly allocated die with its information, | |
13782 | except for its child, sibling, and parent fields. | |
13783 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 13784 | |
d521ce57 | 13785 | static const gdb_byte * |
3019eac3 | 13786 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 13787 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 13788 | int *has_children, int num_extra_attrs) |
93311388 | 13789 | { |
b64f50a1 JK |
13790 | unsigned int abbrev_number, bytes_read, i; |
13791 | sect_offset offset; | |
93311388 DE |
13792 | struct abbrev_info *abbrev; |
13793 | struct die_info *die; | |
13794 | struct dwarf2_cu *cu = reader->cu; | |
13795 | bfd *abfd = reader->abfd; | |
13796 | ||
b64f50a1 | 13797 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
13798 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
13799 | info_ptr += bytes_read; | |
13800 | if (!abbrev_number) | |
13801 | { | |
13802 | *diep = NULL; | |
13803 | *has_children = 0; | |
13804 | return info_ptr; | |
13805 | } | |
13806 | ||
433df2d4 | 13807 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 13808 | if (!abbrev) |
348e048f DE |
13809 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
13810 | abbrev_number, | |
13811 | bfd_get_filename (abfd)); | |
13812 | ||
3019eac3 | 13813 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
13814 | die->offset = offset; |
13815 | die->tag = abbrev->tag; | |
13816 | die->abbrev = abbrev_number; | |
13817 | ||
3019eac3 DE |
13818 | /* Make the result usable. |
13819 | The caller needs to update num_attrs after adding the extra | |
13820 | attributes. */ | |
93311388 DE |
13821 | die->num_attrs = abbrev->num_attrs; |
13822 | ||
13823 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
13824 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
13825 | info_ptr); | |
93311388 DE |
13826 | |
13827 | *diep = die; | |
13828 | *has_children = abbrev->has_children; | |
13829 | return info_ptr; | |
13830 | } | |
13831 | ||
3019eac3 DE |
13832 | /* Read a die and all its attributes. |
13833 | Set DIEP to point to a newly allocated die with its information, | |
13834 | except for its child, sibling, and parent fields. | |
13835 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
13836 | ||
d521ce57 | 13837 | static const gdb_byte * |
3019eac3 | 13838 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 13839 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
13840 | int *has_children) |
13841 | { | |
d521ce57 | 13842 | const gdb_byte *result; |
bf6af496 DE |
13843 | |
13844 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
13845 | ||
13846 | if (dwarf2_die_debug) | |
13847 | { | |
13848 | fprintf_unfiltered (gdb_stdlog, | |
13849 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 13850 | get_section_name (reader->die_section), |
bf6af496 DE |
13851 | (unsigned) (info_ptr - reader->die_section->buffer), |
13852 | bfd_get_filename (reader->abfd)); | |
13853 | dump_die (*diep, dwarf2_die_debug); | |
13854 | } | |
13855 | ||
13856 | return result; | |
3019eac3 | 13857 | } |
433df2d4 DE |
13858 | \f |
13859 | /* Abbreviation tables. | |
3019eac3 | 13860 | |
433df2d4 | 13861 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
13862 | stored in a separate .debug_abbrev section. Before we read any |
13863 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
13864 | in a hash table. */ |
13865 | ||
13866 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
13867 | ||
13868 | static struct abbrev_info * | |
13869 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
13870 | { | |
13871 | struct abbrev_info *abbrev; | |
13872 | ||
13873 | abbrev = (struct abbrev_info *) | |
13874 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
13875 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
13876 | return abbrev; | |
13877 | } | |
13878 | ||
13879 | /* Add an abbreviation to the table. */ | |
c906108c SS |
13880 | |
13881 | static void | |
433df2d4 DE |
13882 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
13883 | unsigned int abbrev_number, | |
13884 | struct abbrev_info *abbrev) | |
13885 | { | |
13886 | unsigned int hash_number; | |
13887 | ||
13888 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
13889 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
13890 | abbrev_table->abbrevs[hash_number] = abbrev; | |
13891 | } | |
dee91e82 | 13892 | |
433df2d4 DE |
13893 | /* Look up an abbrev in the table. |
13894 | Returns NULL if the abbrev is not found. */ | |
13895 | ||
13896 | static struct abbrev_info * | |
13897 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
13898 | unsigned int abbrev_number) | |
c906108c | 13899 | { |
433df2d4 DE |
13900 | unsigned int hash_number; |
13901 | struct abbrev_info *abbrev; | |
13902 | ||
13903 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
13904 | abbrev = abbrev_table->abbrevs[hash_number]; | |
13905 | ||
13906 | while (abbrev) | |
13907 | { | |
13908 | if (abbrev->number == abbrev_number) | |
13909 | return abbrev; | |
13910 | abbrev = abbrev->next; | |
13911 | } | |
13912 | return NULL; | |
13913 | } | |
13914 | ||
13915 | /* Read in an abbrev table. */ | |
13916 | ||
13917 | static struct abbrev_table * | |
13918 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
13919 | sect_offset offset) | |
13920 | { | |
13921 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 13922 | bfd *abfd = get_section_bfd_owner (section); |
433df2d4 | 13923 | struct abbrev_table *abbrev_table; |
d521ce57 | 13924 | const gdb_byte *abbrev_ptr; |
c906108c SS |
13925 | struct abbrev_info *cur_abbrev; |
13926 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 13927 | unsigned int abbrev_form; |
f3dd6933 DJ |
13928 | struct attr_abbrev *cur_attrs; |
13929 | unsigned int allocated_attrs; | |
c906108c | 13930 | |
433df2d4 | 13931 | abbrev_table = XMALLOC (struct abbrev_table); |
f4dc4d17 | 13932 | abbrev_table->offset = offset; |
433df2d4 DE |
13933 | obstack_init (&abbrev_table->abbrev_obstack); |
13934 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
13935 | (ABBREV_HASH_SIZE | |
13936 | * sizeof (struct abbrev_info *))); | |
13937 | memset (abbrev_table->abbrevs, 0, | |
13938 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 13939 | |
433df2d4 DE |
13940 | dwarf2_read_section (objfile, section); |
13941 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
13942 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13943 | abbrev_ptr += bytes_read; | |
13944 | ||
f3dd6933 DJ |
13945 | allocated_attrs = ATTR_ALLOC_CHUNK; |
13946 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 13947 | |
0963b4bd | 13948 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
13949 | while (abbrev_number) |
13950 | { | |
433df2d4 | 13951 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
13952 | |
13953 | /* read in abbrev header */ | |
13954 | cur_abbrev->number = abbrev_number; | |
13955 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13956 | abbrev_ptr += bytes_read; | |
13957 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
13958 | abbrev_ptr += 1; | |
13959 | ||
13960 | /* now read in declarations */ | |
13961 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13962 | abbrev_ptr += bytes_read; | |
13963 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13964 | abbrev_ptr += bytes_read; | |
13965 | while (abbrev_name) | |
13966 | { | |
f3dd6933 | 13967 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 13968 | { |
f3dd6933 DJ |
13969 | allocated_attrs += ATTR_ALLOC_CHUNK; |
13970 | cur_attrs | |
13971 | = xrealloc (cur_attrs, (allocated_attrs | |
13972 | * sizeof (struct attr_abbrev))); | |
c906108c | 13973 | } |
ae038cb0 | 13974 | |
f3dd6933 DJ |
13975 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
13976 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
13977 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13978 | abbrev_ptr += bytes_read; | |
13979 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13980 | abbrev_ptr += bytes_read; | |
13981 | } | |
13982 | ||
433df2d4 | 13983 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
13984 | (cur_abbrev->num_attrs |
13985 | * sizeof (struct attr_abbrev))); | |
13986 | memcpy (cur_abbrev->attrs, cur_attrs, | |
13987 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
13988 | ||
433df2d4 | 13989 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
13990 | |
13991 | /* Get next abbreviation. | |
13992 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
13993 | always properly terminated with an abbrev number of 0. |
13994 | Exit loop if we encounter an abbreviation which we have | |
13995 | already read (which means we are about to read the abbreviations | |
13996 | for the next compile unit) or if the end of the abbreviation | |
13997 | table is reached. */ | |
433df2d4 | 13998 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
13999 | break; |
14000 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
14001 | abbrev_ptr += bytes_read; | |
433df2d4 | 14002 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
14003 | break; |
14004 | } | |
f3dd6933 DJ |
14005 | |
14006 | xfree (cur_attrs); | |
433df2d4 | 14007 | return abbrev_table; |
c906108c SS |
14008 | } |
14009 | ||
433df2d4 | 14010 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 14011 | |
c906108c | 14012 | static void |
433df2d4 | 14013 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 14014 | { |
433df2d4 DE |
14015 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
14016 | xfree (abbrev_table); | |
c906108c SS |
14017 | } |
14018 | ||
f4dc4d17 DE |
14019 | /* Same as abbrev_table_free but as a cleanup. |
14020 | We pass in a pointer to the pointer to the table so that we can | |
14021 | set the pointer to NULL when we're done. It also simplifies | |
14022 | build_type_unit_groups. */ | |
14023 | ||
14024 | static void | |
14025 | abbrev_table_free_cleanup (void *table_ptr) | |
14026 | { | |
14027 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
14028 | ||
14029 | if (*abbrev_table_ptr != NULL) | |
14030 | abbrev_table_free (*abbrev_table_ptr); | |
14031 | *abbrev_table_ptr = NULL; | |
14032 | } | |
14033 | ||
433df2d4 DE |
14034 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
14035 | ||
14036 | static void | |
14037 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
14038 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 14039 | { |
433df2d4 DE |
14040 | cu->abbrev_table = |
14041 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
14042 | } | |
c906108c | 14043 | |
433df2d4 | 14044 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 14045 | |
433df2d4 DE |
14046 | static void |
14047 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
14048 | { | |
14049 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 14050 | |
a2ce51a0 DE |
14051 | if (cu->abbrev_table != NULL) |
14052 | abbrev_table_free (cu->abbrev_table); | |
433df2d4 DE |
14053 | /* Set this to NULL so that we SEGV if we try to read it later, |
14054 | and also because free_comp_unit verifies this is NULL. */ | |
14055 | cu->abbrev_table = NULL; | |
14056 | } | |
14057 | \f | |
72bf9492 DJ |
14058 | /* Returns nonzero if TAG represents a type that we might generate a partial |
14059 | symbol for. */ | |
14060 | ||
14061 | static int | |
14062 | is_type_tag_for_partial (int tag) | |
14063 | { | |
14064 | switch (tag) | |
14065 | { | |
14066 | #if 0 | |
14067 | /* Some types that would be reasonable to generate partial symbols for, | |
14068 | that we don't at present. */ | |
14069 | case DW_TAG_array_type: | |
14070 | case DW_TAG_file_type: | |
14071 | case DW_TAG_ptr_to_member_type: | |
14072 | case DW_TAG_set_type: | |
14073 | case DW_TAG_string_type: | |
14074 | case DW_TAG_subroutine_type: | |
14075 | #endif | |
14076 | case DW_TAG_base_type: | |
14077 | case DW_TAG_class_type: | |
680b30c7 | 14078 | case DW_TAG_interface_type: |
72bf9492 DJ |
14079 | case DW_TAG_enumeration_type: |
14080 | case DW_TAG_structure_type: | |
14081 | case DW_TAG_subrange_type: | |
14082 | case DW_TAG_typedef: | |
14083 | case DW_TAG_union_type: | |
14084 | return 1; | |
14085 | default: | |
14086 | return 0; | |
14087 | } | |
14088 | } | |
14089 | ||
14090 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
14091 | ||
14092 | static struct partial_die_info * | |
dee91e82 | 14093 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 14094 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 14095 | { |
dee91e82 | 14096 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 14097 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
14098 | struct partial_die_info *part_die; |
14099 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
14100 | struct abbrev_info *abbrev; | |
14101 | unsigned int bytes_read; | |
5afb4e99 | 14102 | unsigned int load_all = 0; |
72bf9492 DJ |
14103 | int nesting_level = 1; |
14104 | ||
14105 | parent_die = NULL; | |
14106 | last_die = NULL; | |
14107 | ||
7adf1e79 DE |
14108 | gdb_assert (cu->per_cu != NULL); |
14109 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
14110 | load_all = 1; |
14111 | ||
72bf9492 DJ |
14112 | cu->partial_dies |
14113 | = htab_create_alloc_ex (cu->header.length / 12, | |
14114 | partial_die_hash, | |
14115 | partial_die_eq, | |
14116 | NULL, | |
14117 | &cu->comp_unit_obstack, | |
14118 | hashtab_obstack_allocate, | |
14119 | dummy_obstack_deallocate); | |
14120 | ||
14121 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
14122 | sizeof (struct partial_die_info)); | |
14123 | ||
14124 | while (1) | |
14125 | { | |
14126 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
14127 | ||
14128 | /* A NULL abbrev means the end of a series of children. */ | |
14129 | if (abbrev == NULL) | |
14130 | { | |
14131 | if (--nesting_level == 0) | |
14132 | { | |
14133 | /* PART_DIE was probably the last thing allocated on the | |
14134 | comp_unit_obstack, so we could call obstack_free | |
14135 | here. We don't do that because the waste is small, | |
14136 | and will be cleaned up when we're done with this | |
14137 | compilation unit. This way, we're also more robust | |
14138 | against other users of the comp_unit_obstack. */ | |
14139 | return first_die; | |
14140 | } | |
14141 | info_ptr += bytes_read; | |
14142 | last_die = parent_die; | |
14143 | parent_die = parent_die->die_parent; | |
14144 | continue; | |
14145 | } | |
14146 | ||
98bfdba5 PA |
14147 | /* Check for template arguments. We never save these; if |
14148 | they're seen, we just mark the parent, and go on our way. */ | |
14149 | if (parent_die != NULL | |
14150 | && cu->language == language_cplus | |
14151 | && (abbrev->tag == DW_TAG_template_type_param | |
14152 | || abbrev->tag == DW_TAG_template_value_param)) | |
14153 | { | |
14154 | parent_die->has_template_arguments = 1; | |
14155 | ||
14156 | if (!load_all) | |
14157 | { | |
14158 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 14159 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
14160 | continue; |
14161 | } | |
14162 | } | |
14163 | ||
0d99eb77 | 14164 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
14165 | Skip their other children. */ |
14166 | if (!load_all | |
14167 | && cu->language == language_cplus | |
14168 | && parent_die != NULL | |
14169 | && parent_die->tag == DW_TAG_subprogram) | |
14170 | { | |
dee91e82 | 14171 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
14172 | continue; |
14173 | } | |
14174 | ||
5afb4e99 DJ |
14175 | /* Check whether this DIE is interesting enough to save. Normally |
14176 | we would not be interested in members here, but there may be | |
14177 | later variables referencing them via DW_AT_specification (for | |
14178 | static members). */ | |
14179 | if (!load_all | |
14180 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 14181 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
14182 | && abbrev->tag != DW_TAG_enumerator |
14183 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 14184 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 14185 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 14186 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 14187 | && abbrev->tag != DW_TAG_module |
95554aad TT |
14188 | && abbrev->tag != DW_TAG_member |
14189 | && abbrev->tag != DW_TAG_imported_unit) | |
72bf9492 DJ |
14190 | { |
14191 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 14192 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
14193 | continue; |
14194 | } | |
14195 | ||
dee91e82 DE |
14196 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
14197 | info_ptr); | |
72bf9492 DJ |
14198 | |
14199 | /* This two-pass algorithm for processing partial symbols has a | |
14200 | high cost in cache pressure. Thus, handle some simple cases | |
14201 | here which cover the majority of C partial symbols. DIEs | |
14202 | which neither have specification tags in them, nor could have | |
14203 | specification tags elsewhere pointing at them, can simply be | |
14204 | processed and discarded. | |
14205 | ||
14206 | This segment is also optional; scan_partial_symbols and | |
14207 | add_partial_symbol will handle these DIEs if we chain | |
14208 | them in normally. When compilers which do not emit large | |
14209 | quantities of duplicate debug information are more common, | |
14210 | this code can probably be removed. */ | |
14211 | ||
14212 | /* Any complete simple types at the top level (pretty much all | |
14213 | of them, for a language without namespaces), can be processed | |
14214 | directly. */ | |
14215 | if (parent_die == NULL | |
14216 | && part_die->has_specification == 0 | |
14217 | && part_die->is_declaration == 0 | |
d8228535 | 14218 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
14219 | || part_die->tag == DW_TAG_base_type |
14220 | || part_die->tag == DW_TAG_subrange_type)) | |
14221 | { | |
14222 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 14223 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 14224 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
14225 | &objfile->static_psymbols, |
14226 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 14227 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
14228 | continue; |
14229 | } | |
14230 | ||
d8228535 JK |
14231 | /* The exception for DW_TAG_typedef with has_children above is |
14232 | a workaround of GCC PR debug/47510. In the case of this complaint | |
14233 | type_name_no_tag_or_error will error on such types later. | |
14234 | ||
14235 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
14236 | it could not find the child DIEs referenced later, this is checked | |
14237 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
14238 | ||
14239 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
14240 | complaint (&symfile_complaints, | |
14241 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
14242 | "- DIE at 0x%x [in module %s]"), | |
4262abfb | 14243 | part_die->offset.sect_off, objfile_name (objfile)); |
d8228535 | 14244 | |
72bf9492 DJ |
14245 | /* If we're at the second level, and we're an enumerator, and |
14246 | our parent has no specification (meaning possibly lives in a | |
14247 | namespace elsewhere), then we can add the partial symbol now | |
14248 | instead of queueing it. */ | |
14249 | if (part_die->tag == DW_TAG_enumerator | |
14250 | && parent_die != NULL | |
14251 | && parent_die->die_parent == NULL | |
14252 | && parent_die->tag == DW_TAG_enumeration_type | |
14253 | && parent_die->has_specification == 0) | |
14254 | { | |
14255 | if (part_die->name == NULL) | |
3e43a32a MS |
14256 | complaint (&symfile_complaints, |
14257 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 14258 | else if (building_psymtab) |
04a679b8 | 14259 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 14260 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
14261 | (cu->language == language_cplus |
14262 | || cu->language == language_java) | |
bb5ed363 DE |
14263 | ? &objfile->global_psymbols |
14264 | : &objfile->static_psymbols, | |
14265 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 14266 | |
dee91e82 | 14267 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
14268 | continue; |
14269 | } | |
14270 | ||
14271 | /* We'll save this DIE so link it in. */ | |
14272 | part_die->die_parent = parent_die; | |
14273 | part_die->die_sibling = NULL; | |
14274 | part_die->die_child = NULL; | |
14275 | ||
14276 | if (last_die && last_die == parent_die) | |
14277 | last_die->die_child = part_die; | |
14278 | else if (last_die) | |
14279 | last_die->die_sibling = part_die; | |
14280 | ||
14281 | last_die = part_die; | |
14282 | ||
14283 | if (first_die == NULL) | |
14284 | first_die = part_die; | |
14285 | ||
14286 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
14287 | find interesting need to be in the hash table, because we | |
14288 | also have the parent/sibling/child chains; only those that we | |
14289 | might refer to by offset later during partial symbol reading. | |
14290 | ||
14291 | For now this means things that might have be the target of a | |
14292 | DW_AT_specification, DW_AT_abstract_origin, or | |
14293 | DW_AT_extension. DW_AT_extension will refer only to | |
14294 | namespaces; DW_AT_abstract_origin refers to functions (and | |
14295 | many things under the function DIE, but we do not recurse | |
14296 | into function DIEs during partial symbol reading) and | |
14297 | possibly variables as well; DW_AT_specification refers to | |
14298 | declarations. Declarations ought to have the DW_AT_declaration | |
14299 | flag. It happens that GCC forgets to put it in sometimes, but | |
14300 | only for functions, not for types. | |
14301 | ||
14302 | Adding more things than necessary to the hash table is harmless | |
14303 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
14304 | wasted time in find_partial_die, when we reread the compilation |
14305 | unit with load_all_dies set. */ | |
72bf9492 | 14306 | |
5afb4e99 | 14307 | if (load_all |
72929c62 | 14308 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 14309 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
14310 | || abbrev->tag == DW_TAG_variable |
14311 | || abbrev->tag == DW_TAG_namespace | |
14312 | || part_die->is_declaration) | |
14313 | { | |
14314 | void **slot; | |
14315 | ||
14316 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 14317 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
14318 | *slot = part_die; |
14319 | } | |
14320 | ||
14321 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
14322 | sizeof (struct partial_die_info)); | |
14323 | ||
14324 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 14325 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
14326 | languages we have to, so that we can get at method physnames |
14327 | to infer fully qualified class names, for DW_AT_specification, | |
14328 | and for C++ template arguments. For C++, we also look one level | |
14329 | inside functions to find template arguments (if the name of the | |
14330 | function does not already contain the template arguments). | |
bc30ff58 JB |
14331 | |
14332 | For Ada, we need to scan the children of subprograms and lexical | |
14333 | blocks as well because Ada allows the definition of nested | |
14334 | entities that could be interesting for the debugger, such as | |
14335 | nested subprograms for instance. */ | |
72bf9492 | 14336 | if (last_die->has_children |
5afb4e99 DJ |
14337 | && (load_all |
14338 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 14339 | || last_die->tag == DW_TAG_module |
72bf9492 | 14340 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
14341 | || (cu->language == language_cplus |
14342 | && last_die->tag == DW_TAG_subprogram | |
14343 | && (last_die->name == NULL | |
14344 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
14345 | || (cu->language != language_c |
14346 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 14347 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 14348 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
14349 | || last_die->tag == DW_TAG_union_type)) |
14350 | || (cu->language == language_ada | |
14351 | && (last_die->tag == DW_TAG_subprogram | |
14352 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
14353 | { |
14354 | nesting_level++; | |
14355 | parent_die = last_die; | |
14356 | continue; | |
14357 | } | |
14358 | ||
14359 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 14360 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
14361 | |
14362 | /* Back to the top, do it again. */ | |
14363 | } | |
14364 | } | |
14365 | ||
c906108c SS |
14366 | /* Read a minimal amount of information into the minimal die structure. */ |
14367 | ||
d521ce57 | 14368 | static const gdb_byte * |
dee91e82 DE |
14369 | read_partial_die (const struct die_reader_specs *reader, |
14370 | struct partial_die_info *part_die, | |
14371 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 14372 | const gdb_byte *info_ptr) |
c906108c | 14373 | { |
dee91e82 | 14374 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 14375 | struct objfile *objfile = cu->objfile; |
d521ce57 | 14376 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 14377 | unsigned int i; |
c906108c | 14378 | struct attribute attr; |
c5aa993b | 14379 | int has_low_pc_attr = 0; |
c906108c | 14380 | int has_high_pc_attr = 0; |
91da1414 | 14381 | int high_pc_relative = 0; |
c906108c | 14382 | |
72bf9492 | 14383 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 14384 | |
b64f50a1 | 14385 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
14386 | |
14387 | info_ptr += abbrev_len; | |
14388 | ||
14389 | if (abbrev == NULL) | |
14390 | return info_ptr; | |
14391 | ||
c906108c SS |
14392 | part_die->tag = abbrev->tag; |
14393 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
14394 | |
14395 | for (i = 0; i < abbrev->num_attrs; ++i) | |
14396 | { | |
dee91e82 | 14397 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
14398 | |
14399 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 14400 | partial symbol table. */ |
c906108c SS |
14401 | switch (attr.name) |
14402 | { | |
14403 | case DW_AT_name: | |
71c25dea TT |
14404 | switch (part_die->tag) |
14405 | { | |
14406 | case DW_TAG_compile_unit: | |
95554aad | 14407 | case DW_TAG_partial_unit: |
348e048f | 14408 | case DW_TAG_type_unit: |
71c25dea TT |
14409 | /* Compilation units have a DW_AT_name that is a filename, not |
14410 | a source language identifier. */ | |
14411 | case DW_TAG_enumeration_type: | |
14412 | case DW_TAG_enumerator: | |
14413 | /* These tags always have simple identifiers already; no need | |
14414 | to canonicalize them. */ | |
14415 | part_die->name = DW_STRING (&attr); | |
14416 | break; | |
14417 | default: | |
14418 | part_die->name | |
14419 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
bb5ed363 | 14420 | &objfile->objfile_obstack); |
71c25dea TT |
14421 | break; |
14422 | } | |
c906108c | 14423 | break; |
31ef98ae | 14424 | case DW_AT_linkage_name: |
c906108c | 14425 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
14426 | /* Note that both forms of linkage name might appear. We |
14427 | assume they will be the same, and we only store the last | |
14428 | one we see. */ | |
94af9270 KS |
14429 | if (cu->language == language_ada) |
14430 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 14431 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
14432 | break; |
14433 | case DW_AT_low_pc: | |
14434 | has_low_pc_attr = 1; | |
14435 | part_die->lowpc = DW_ADDR (&attr); | |
14436 | break; | |
14437 | case DW_AT_high_pc: | |
14438 | has_high_pc_attr = 1; | |
3019eac3 DE |
14439 | if (attr.form == DW_FORM_addr |
14440 | || attr.form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
14441 | part_die->highpc = DW_ADDR (&attr); |
14442 | else | |
14443 | { | |
14444 | high_pc_relative = 1; | |
14445 | part_die->highpc = DW_UNSND (&attr); | |
14446 | } | |
c906108c SS |
14447 | break; |
14448 | case DW_AT_location: | |
0963b4bd | 14449 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
14450 | if (attr_form_is_block (&attr)) |
14451 | { | |
95554aad | 14452 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 14453 | } |
3690dd37 | 14454 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 14455 | { |
4d3c2250 | 14456 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14457 | } |
14458 | else | |
14459 | { | |
4d3c2250 KB |
14460 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
14461 | "partial symbol information"); | |
8e19ed76 | 14462 | } |
c906108c | 14463 | break; |
c906108c SS |
14464 | case DW_AT_external: |
14465 | part_die->is_external = DW_UNSND (&attr); | |
14466 | break; | |
14467 | case DW_AT_declaration: | |
14468 | part_die->is_declaration = DW_UNSND (&attr); | |
14469 | break; | |
14470 | case DW_AT_type: | |
14471 | part_die->has_type = 1; | |
14472 | break; | |
14473 | case DW_AT_abstract_origin: | |
14474 | case DW_AT_specification: | |
72bf9492 DJ |
14475 | case DW_AT_extension: |
14476 | part_die->has_specification = 1; | |
c764a876 | 14477 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
14478 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
14479 | || cu->per_cu->is_dwz); | |
c906108c SS |
14480 | break; |
14481 | case DW_AT_sibling: | |
14482 | /* Ignore absolute siblings, they might point outside of | |
14483 | the current compile unit. */ | |
14484 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
14485 | complaint (&symfile_complaints, |
14486 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 14487 | else |
b64f50a1 | 14488 | part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
c906108c | 14489 | break; |
fa4028e9 JB |
14490 | case DW_AT_byte_size: |
14491 | part_die->has_byte_size = 1; | |
14492 | break; | |
68511cec CES |
14493 | case DW_AT_calling_convention: |
14494 | /* DWARF doesn't provide a way to identify a program's source-level | |
14495 | entry point. DW_AT_calling_convention attributes are only meant | |
14496 | to describe functions' calling conventions. | |
14497 | ||
14498 | However, because it's a necessary piece of information in | |
14499 | Fortran, and because DW_CC_program is the only piece of debugging | |
14500 | information whose definition refers to a 'main program' at all, | |
14501 | several compilers have begun marking Fortran main programs with | |
14502 | DW_CC_program --- even when those functions use the standard | |
14503 | calling conventions. | |
14504 | ||
14505 | So until DWARF specifies a way to provide this information and | |
14506 | compilers pick up the new representation, we'll support this | |
14507 | practice. */ | |
14508 | if (DW_UNSND (&attr) == DW_CC_program | |
14509 | && cu->language == language_fortran) | |
01f8c46d JK |
14510 | { |
14511 | set_main_name (part_die->name); | |
14512 | ||
14513 | /* As this DIE has a static linkage the name would be difficult | |
14514 | to look up later. */ | |
14515 | language_of_main = language_fortran; | |
14516 | } | |
68511cec | 14517 | break; |
481860b3 GB |
14518 | case DW_AT_inline: |
14519 | if (DW_UNSND (&attr) == DW_INL_inlined | |
14520 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
14521 | part_die->may_be_inlined = 1; | |
14522 | break; | |
95554aad TT |
14523 | |
14524 | case DW_AT_import: | |
14525 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
14526 | { |
14527 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
14528 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
14529 | || cu->per_cu->is_dwz); | |
14530 | } | |
95554aad TT |
14531 | break; |
14532 | ||
c906108c SS |
14533 | default: |
14534 | break; | |
14535 | } | |
14536 | } | |
14537 | ||
91da1414 MW |
14538 | if (high_pc_relative) |
14539 | part_die->highpc += part_die->lowpc; | |
14540 | ||
9373cf26 JK |
14541 | if (has_low_pc_attr && has_high_pc_attr) |
14542 | { | |
14543 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14544 | eliminate duplicate copies of functions and vtables and such. | |
14545 | The linker will arbitrarily choose one and discard the others. | |
14546 | The AT_*_pc values for such functions refer to local labels in | |
14547 | these sections. If the section from that file was discarded, the | |
14548 | labels are not in the output, so the relocs get a value of 0. | |
14549 | If this is a discarded function, mark the pc bounds as invalid, | |
14550 | so that GDB will ignore it. */ | |
14551 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
14552 | { | |
bb5ed363 | 14553 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
14554 | |
14555 | complaint (&symfile_complaints, | |
14556 | _("DW_AT_low_pc %s is zero " | |
14557 | "for DIE at 0x%x [in module %s]"), | |
14558 | paddress (gdbarch, part_die->lowpc), | |
4262abfb | 14559 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
14560 | } |
14561 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
14562 | else if (part_die->lowpc >= part_die->highpc) | |
14563 | { | |
bb5ed363 | 14564 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
14565 | |
14566 | complaint (&symfile_complaints, | |
14567 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
14568 | "for DIE at 0x%x [in module %s]"), | |
14569 | paddress (gdbarch, part_die->lowpc), | |
14570 | paddress (gdbarch, part_die->highpc), | |
4262abfb | 14571 | part_die->offset.sect_off, objfile_name (objfile)); |
9373cf26 JK |
14572 | } |
14573 | else | |
14574 | part_die->has_pc_info = 1; | |
14575 | } | |
85cbf3d3 | 14576 | |
c906108c SS |
14577 | return info_ptr; |
14578 | } | |
14579 | ||
72bf9492 DJ |
14580 | /* Find a cached partial DIE at OFFSET in CU. */ |
14581 | ||
14582 | static struct partial_die_info * | |
b64f50a1 | 14583 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
14584 | { |
14585 | struct partial_die_info *lookup_die = NULL; | |
14586 | struct partial_die_info part_die; | |
14587 | ||
14588 | part_die.offset = offset; | |
b64f50a1 JK |
14589 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
14590 | offset.sect_off); | |
72bf9492 | 14591 | |
72bf9492 DJ |
14592 | return lookup_die; |
14593 | } | |
14594 | ||
348e048f DE |
14595 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
14596 | except in the case of .debug_types DIEs which do not reference | |
14597 | outside their CU (they do however referencing other types via | |
55f1336d | 14598 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
14599 | |
14600 | static struct partial_die_info * | |
36586728 | 14601 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 14602 | { |
bb5ed363 | 14603 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
14604 | struct dwarf2_per_cu_data *per_cu = NULL; |
14605 | struct partial_die_info *pd = NULL; | |
72bf9492 | 14606 | |
36586728 TT |
14607 | if (offset_in_dwz == cu->per_cu->is_dwz |
14608 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
14609 | { |
14610 | pd = find_partial_die_in_comp_unit (offset, cu); | |
14611 | if (pd != NULL) | |
14612 | return pd; | |
0d99eb77 DE |
14613 | /* We missed recording what we needed. |
14614 | Load all dies and try again. */ | |
14615 | per_cu = cu->per_cu; | |
5afb4e99 | 14616 | } |
0d99eb77 DE |
14617 | else |
14618 | { | |
14619 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 14620 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
14621 | { |
14622 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
14623 | " external reference to offset 0x%lx [in module %s].\n"), | |
14624 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
14625 | bfd_get_filename (objfile->obfd)); | |
14626 | } | |
36586728 TT |
14627 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
14628 | objfile); | |
72bf9492 | 14629 | |
0d99eb77 DE |
14630 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
14631 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 14632 | |
0d99eb77 DE |
14633 | per_cu->cu->last_used = 0; |
14634 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
14635 | } | |
5afb4e99 | 14636 | |
dee91e82 DE |
14637 | /* If we didn't find it, and not all dies have been loaded, |
14638 | load them all and try again. */ | |
14639 | ||
5afb4e99 DJ |
14640 | if (pd == NULL && per_cu->load_all_dies == 0) |
14641 | { | |
5afb4e99 | 14642 | per_cu->load_all_dies = 1; |
fd820528 DE |
14643 | |
14644 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
14645 | THIS_CU->cu may already be in use. So we can't just free it and | |
14646 | replace its DIEs with the ones we read in. Instead, we leave those | |
14647 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
14648 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
14649 | set. */ | |
dee91e82 | 14650 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
14651 | |
14652 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
14653 | } | |
14654 | ||
14655 | if (pd == NULL) | |
14656 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
14657 | _("could not find partial DIE 0x%x " |
14658 | "in cache [from module %s]\n"), | |
b64f50a1 | 14659 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 14660 | return pd; |
72bf9492 DJ |
14661 | } |
14662 | ||
abc72ce4 DE |
14663 | /* See if we can figure out if the class lives in a namespace. We do |
14664 | this by looking for a member function; its demangled name will | |
14665 | contain namespace info, if there is any. */ | |
14666 | ||
14667 | static void | |
14668 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
14669 | struct dwarf2_cu *cu) | |
14670 | { | |
14671 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
14672 | what template types look like, because the demangler | |
14673 | frequently doesn't give the same name as the debug info. We | |
14674 | could fix this by only using the demangled name to get the | |
14675 | prefix (but see comment in read_structure_type). */ | |
14676 | ||
14677 | struct partial_die_info *real_pdi; | |
14678 | struct partial_die_info *child_pdi; | |
14679 | ||
14680 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
14681 | we should not do this. We'll prepend the parent's fully qualified | |
14682 | name when we create the partial symbol. */ | |
14683 | ||
14684 | real_pdi = struct_pdi; | |
14685 | while (real_pdi->has_specification) | |
36586728 TT |
14686 | real_pdi = find_partial_die (real_pdi->spec_offset, |
14687 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
14688 | |
14689 | if (real_pdi->die_parent != NULL) | |
14690 | return; | |
14691 | ||
14692 | for (child_pdi = struct_pdi->die_child; | |
14693 | child_pdi != NULL; | |
14694 | child_pdi = child_pdi->die_sibling) | |
14695 | { | |
14696 | if (child_pdi->tag == DW_TAG_subprogram | |
14697 | && child_pdi->linkage_name != NULL) | |
14698 | { | |
14699 | char *actual_class_name | |
14700 | = language_class_name_from_physname (cu->language_defn, | |
14701 | child_pdi->linkage_name); | |
14702 | if (actual_class_name != NULL) | |
14703 | { | |
14704 | struct_pdi->name | |
10f0c4bb TT |
14705 | = obstack_copy0 (&cu->objfile->objfile_obstack, |
14706 | actual_class_name, | |
14707 | strlen (actual_class_name)); | |
abc72ce4 DE |
14708 | xfree (actual_class_name); |
14709 | } | |
14710 | break; | |
14711 | } | |
14712 | } | |
14713 | } | |
14714 | ||
72bf9492 DJ |
14715 | /* Adjust PART_DIE before generating a symbol for it. This function |
14716 | may set the is_external flag or change the DIE's name. */ | |
14717 | ||
14718 | static void | |
14719 | fixup_partial_die (struct partial_die_info *part_die, | |
14720 | struct dwarf2_cu *cu) | |
14721 | { | |
abc72ce4 DE |
14722 | /* Once we've fixed up a die, there's no point in doing so again. |
14723 | This also avoids a memory leak if we were to call | |
14724 | guess_partial_die_structure_name multiple times. */ | |
14725 | if (part_die->fixup_called) | |
14726 | return; | |
14727 | ||
72bf9492 DJ |
14728 | /* If we found a reference attribute and the DIE has no name, try |
14729 | to find a name in the referred to DIE. */ | |
14730 | ||
14731 | if (part_die->name == NULL && part_die->has_specification) | |
14732 | { | |
14733 | struct partial_die_info *spec_die; | |
72bf9492 | 14734 | |
36586728 TT |
14735 | spec_die = find_partial_die (part_die->spec_offset, |
14736 | part_die->spec_is_dwz, cu); | |
72bf9492 | 14737 | |
10b3939b | 14738 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
14739 | |
14740 | if (spec_die->name) | |
14741 | { | |
14742 | part_die->name = spec_die->name; | |
14743 | ||
14744 | /* Copy DW_AT_external attribute if it is set. */ | |
14745 | if (spec_die->is_external) | |
14746 | part_die->is_external = spec_die->is_external; | |
14747 | } | |
14748 | } | |
14749 | ||
14750 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
14751 | |
14752 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 14753 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 14754 | |
abc72ce4 DE |
14755 | /* If there is no parent die to provide a namespace, and there are |
14756 | children, see if we can determine the namespace from their linkage | |
122d1940 | 14757 | name. */ |
abc72ce4 | 14758 | if (cu->language == language_cplus |
8b70b953 | 14759 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
14760 | && part_die->die_parent == NULL |
14761 | && part_die->has_children | |
14762 | && (part_die->tag == DW_TAG_class_type | |
14763 | || part_die->tag == DW_TAG_structure_type | |
14764 | || part_die->tag == DW_TAG_union_type)) | |
14765 | guess_partial_die_structure_name (part_die, cu); | |
14766 | ||
53832f31 TT |
14767 | /* GCC might emit a nameless struct or union that has a linkage |
14768 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
14769 | if (part_die->name == NULL | |
96408a79 SA |
14770 | && (part_die->tag == DW_TAG_class_type |
14771 | || part_die->tag == DW_TAG_interface_type | |
14772 | || part_die->tag == DW_TAG_structure_type | |
14773 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
14774 | && part_die->linkage_name != NULL) |
14775 | { | |
14776 | char *demangled; | |
14777 | ||
8de20a37 | 14778 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
14779 | if (demangled) |
14780 | { | |
96408a79 SA |
14781 | const char *base; |
14782 | ||
14783 | /* Strip any leading namespaces/classes, keep only the base name. | |
14784 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
14785 | base = strrchr (demangled, ':'); | |
14786 | if (base && base > demangled && base[-1] == ':') | |
14787 | base++; | |
14788 | else | |
14789 | base = demangled; | |
14790 | ||
10f0c4bb TT |
14791 | part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack, |
14792 | base, strlen (base)); | |
53832f31 TT |
14793 | xfree (demangled); |
14794 | } | |
14795 | } | |
14796 | ||
abc72ce4 | 14797 | part_die->fixup_called = 1; |
72bf9492 DJ |
14798 | } |
14799 | ||
a8329558 | 14800 | /* Read an attribute value described by an attribute form. */ |
c906108c | 14801 | |
d521ce57 | 14802 | static const gdb_byte * |
dee91e82 DE |
14803 | read_attribute_value (const struct die_reader_specs *reader, |
14804 | struct attribute *attr, unsigned form, | |
d521ce57 | 14805 | const gdb_byte *info_ptr) |
c906108c | 14806 | { |
dee91e82 DE |
14807 | struct dwarf2_cu *cu = reader->cu; |
14808 | bfd *abfd = reader->abfd; | |
e7c27a73 | 14809 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
14810 | unsigned int bytes_read; |
14811 | struct dwarf_block *blk; | |
14812 | ||
a8329558 KW |
14813 | attr->form = form; |
14814 | switch (form) | |
c906108c | 14815 | { |
c906108c | 14816 | case DW_FORM_ref_addr: |
ae411497 | 14817 | if (cu->header.version == 2) |
4568ecf9 | 14818 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 14819 | else |
4568ecf9 DE |
14820 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
14821 | &cu->header, &bytes_read); | |
ae411497 TT |
14822 | info_ptr += bytes_read; |
14823 | break; | |
36586728 TT |
14824 | case DW_FORM_GNU_ref_alt: |
14825 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
14826 | info_ptr += bytes_read; | |
14827 | break; | |
ae411497 | 14828 | case DW_FORM_addr: |
e7c27a73 | 14829 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 14830 | info_ptr += bytes_read; |
c906108c SS |
14831 | break; |
14832 | case DW_FORM_block2: | |
7b5a2f43 | 14833 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14834 | blk->size = read_2_bytes (abfd, info_ptr); |
14835 | info_ptr += 2; | |
14836 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14837 | info_ptr += blk->size; | |
14838 | DW_BLOCK (attr) = blk; | |
14839 | break; | |
14840 | case DW_FORM_block4: | |
7b5a2f43 | 14841 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14842 | blk->size = read_4_bytes (abfd, info_ptr); |
14843 | info_ptr += 4; | |
14844 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14845 | info_ptr += blk->size; | |
14846 | DW_BLOCK (attr) = blk; | |
14847 | break; | |
14848 | case DW_FORM_data2: | |
14849 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
14850 | info_ptr += 2; | |
14851 | break; | |
14852 | case DW_FORM_data4: | |
14853 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
14854 | info_ptr += 4; | |
14855 | break; | |
14856 | case DW_FORM_data8: | |
14857 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
14858 | info_ptr += 8; | |
14859 | break; | |
2dc7f7b3 TT |
14860 | case DW_FORM_sec_offset: |
14861 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
14862 | info_ptr += bytes_read; | |
14863 | break; | |
c906108c | 14864 | case DW_FORM_string: |
9b1c24c8 | 14865 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 14866 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
14867 | info_ptr += bytes_read; |
14868 | break; | |
4bdf3d34 | 14869 | case DW_FORM_strp: |
36586728 TT |
14870 | if (!cu->per_cu->is_dwz) |
14871 | { | |
14872 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
14873 | &bytes_read); | |
14874 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14875 | info_ptr += bytes_read; | |
14876 | break; | |
14877 | } | |
14878 | /* FALLTHROUGH */ | |
14879 | case DW_FORM_GNU_strp_alt: | |
14880 | { | |
14881 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
14882 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
14883 | &bytes_read); | |
14884 | ||
14885 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
14886 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14887 | info_ptr += bytes_read; | |
14888 | } | |
4bdf3d34 | 14889 | break; |
2dc7f7b3 | 14890 | case DW_FORM_exprloc: |
c906108c | 14891 | case DW_FORM_block: |
7b5a2f43 | 14892 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14893 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14894 | info_ptr += bytes_read; | |
14895 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14896 | info_ptr += blk->size; | |
14897 | DW_BLOCK (attr) = blk; | |
14898 | break; | |
14899 | case DW_FORM_block1: | |
7b5a2f43 | 14900 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14901 | blk->size = read_1_byte (abfd, info_ptr); |
14902 | info_ptr += 1; | |
14903 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14904 | info_ptr += blk->size; | |
14905 | DW_BLOCK (attr) = blk; | |
14906 | break; | |
14907 | case DW_FORM_data1: | |
14908 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
14909 | info_ptr += 1; | |
14910 | break; | |
14911 | case DW_FORM_flag: | |
14912 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
14913 | info_ptr += 1; | |
14914 | break; | |
2dc7f7b3 TT |
14915 | case DW_FORM_flag_present: |
14916 | DW_UNSND (attr) = 1; | |
14917 | break; | |
c906108c SS |
14918 | case DW_FORM_sdata: |
14919 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
14920 | info_ptr += bytes_read; | |
14921 | break; | |
14922 | case DW_FORM_udata: | |
14923 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14924 | info_ptr += bytes_read; | |
14925 | break; | |
14926 | case DW_FORM_ref1: | |
4568ecf9 DE |
14927 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14928 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
14929 | info_ptr += 1; |
14930 | break; | |
14931 | case DW_FORM_ref2: | |
4568ecf9 DE |
14932 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14933 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
14934 | info_ptr += 2; |
14935 | break; | |
14936 | case DW_FORM_ref4: | |
4568ecf9 DE |
14937 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14938 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
14939 | info_ptr += 4; |
14940 | break; | |
613e1657 | 14941 | case DW_FORM_ref8: |
4568ecf9 DE |
14942 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14943 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
14944 | info_ptr += 8; |
14945 | break; | |
55f1336d | 14946 | case DW_FORM_ref_sig8: |
ac9ec31b | 14947 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
14948 | info_ptr += 8; |
14949 | break; | |
c906108c | 14950 | case DW_FORM_ref_udata: |
4568ecf9 DE |
14951 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14952 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
14953 | info_ptr += bytes_read; |
14954 | break; | |
c906108c | 14955 | case DW_FORM_indirect: |
a8329558 KW |
14956 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14957 | info_ptr += bytes_read; | |
dee91e82 | 14958 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 14959 | break; |
3019eac3 DE |
14960 | case DW_FORM_GNU_addr_index: |
14961 | if (reader->dwo_file == NULL) | |
14962 | { | |
14963 | /* For now flag a hard error. | |
14964 | Later we can turn this into a complaint. */ | |
14965 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14966 | dwarf_form_name (form), | |
14967 | bfd_get_filename (abfd)); | |
14968 | } | |
14969 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
14970 | info_ptr += bytes_read; | |
14971 | break; | |
14972 | case DW_FORM_GNU_str_index: | |
14973 | if (reader->dwo_file == NULL) | |
14974 | { | |
14975 | /* For now flag a hard error. | |
14976 | Later we can turn this into a complaint if warranted. */ | |
14977 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14978 | dwarf_form_name (form), | |
14979 | bfd_get_filename (abfd)); | |
14980 | } | |
14981 | { | |
14982 | ULONGEST str_index = | |
14983 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14984 | ||
14985 | DW_STRING (attr) = read_str_index (reader, cu, str_index); | |
14986 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14987 | info_ptr += bytes_read; | |
14988 | } | |
14989 | break; | |
c906108c | 14990 | default: |
8a3fe4f8 | 14991 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
14992 | dwarf_form_name (form), |
14993 | bfd_get_filename (abfd)); | |
c906108c | 14994 | } |
28e94949 | 14995 | |
36586728 | 14996 | /* Super hack. */ |
7771576e | 14997 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
14998 | attr->form = DW_FORM_GNU_ref_alt; |
14999 | ||
28e94949 JB |
15000 | /* We have seen instances where the compiler tried to emit a byte |
15001 | size attribute of -1 which ended up being encoded as an unsigned | |
15002 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
15003 | an object of this size seems pretty unlikely so we can relatively | |
15004 | safely treat these cases as if the size attribute was invalid and | |
15005 | treat them as zero by default. */ | |
15006 | if (attr->name == DW_AT_byte_size | |
15007 | && form == DW_FORM_data4 | |
15008 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
15009 | { |
15010 | complaint | |
15011 | (&symfile_complaints, | |
43bbcdc2 PH |
15012 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
15013 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
15014 | DW_UNSND (attr) = 0; |
15015 | } | |
28e94949 | 15016 | |
c906108c SS |
15017 | return info_ptr; |
15018 | } | |
15019 | ||
a8329558 KW |
15020 | /* Read an attribute described by an abbreviated attribute. */ |
15021 | ||
d521ce57 | 15022 | static const gdb_byte * |
dee91e82 DE |
15023 | read_attribute (const struct die_reader_specs *reader, |
15024 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 15025 | const gdb_byte *info_ptr) |
a8329558 KW |
15026 | { |
15027 | attr->name = abbrev->name; | |
dee91e82 | 15028 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
15029 | } |
15030 | ||
0963b4bd | 15031 | /* Read dwarf information from a buffer. */ |
c906108c SS |
15032 | |
15033 | static unsigned int | |
a1855c1d | 15034 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 15035 | { |
fe1b8b76 | 15036 | return bfd_get_8 (abfd, buf); |
c906108c SS |
15037 | } |
15038 | ||
15039 | static int | |
a1855c1d | 15040 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 15041 | { |
fe1b8b76 | 15042 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
15043 | } |
15044 | ||
15045 | static unsigned int | |
a1855c1d | 15046 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 15047 | { |
fe1b8b76 | 15048 | return bfd_get_16 (abfd, buf); |
c906108c SS |
15049 | } |
15050 | ||
21ae7a4d | 15051 | static int |
a1855c1d | 15052 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
15053 | { |
15054 | return bfd_get_signed_16 (abfd, buf); | |
15055 | } | |
15056 | ||
c906108c | 15057 | static unsigned int |
a1855c1d | 15058 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 15059 | { |
fe1b8b76 | 15060 | return bfd_get_32 (abfd, buf); |
c906108c SS |
15061 | } |
15062 | ||
21ae7a4d | 15063 | static int |
a1855c1d | 15064 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
15065 | { |
15066 | return bfd_get_signed_32 (abfd, buf); | |
15067 | } | |
15068 | ||
93311388 | 15069 | static ULONGEST |
a1855c1d | 15070 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 15071 | { |
fe1b8b76 | 15072 | return bfd_get_64 (abfd, buf); |
c906108c SS |
15073 | } |
15074 | ||
15075 | static CORE_ADDR | |
d521ce57 | 15076 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 15077 | unsigned int *bytes_read) |
c906108c | 15078 | { |
e7c27a73 | 15079 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
15080 | CORE_ADDR retval = 0; |
15081 | ||
107d2387 | 15082 | if (cu_header->signed_addr_p) |
c906108c | 15083 | { |
107d2387 AC |
15084 | switch (cu_header->addr_size) |
15085 | { | |
15086 | case 2: | |
fe1b8b76 | 15087 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
15088 | break; |
15089 | case 4: | |
fe1b8b76 | 15090 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
15091 | break; |
15092 | case 8: | |
fe1b8b76 | 15093 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
15094 | break; |
15095 | default: | |
8e65ff28 | 15096 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 15097 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 15098 | bfd_get_filename (abfd)); |
107d2387 AC |
15099 | } |
15100 | } | |
15101 | else | |
15102 | { | |
15103 | switch (cu_header->addr_size) | |
15104 | { | |
15105 | case 2: | |
fe1b8b76 | 15106 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
15107 | break; |
15108 | case 4: | |
fe1b8b76 | 15109 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
15110 | break; |
15111 | case 8: | |
fe1b8b76 | 15112 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
15113 | break; |
15114 | default: | |
8e65ff28 | 15115 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
15116 | _("read_address: bad switch, " |
15117 | "unsigned [in module %s]"), | |
659b0389 | 15118 | bfd_get_filename (abfd)); |
107d2387 | 15119 | } |
c906108c | 15120 | } |
64367e0a | 15121 | |
107d2387 AC |
15122 | *bytes_read = cu_header->addr_size; |
15123 | return retval; | |
c906108c SS |
15124 | } |
15125 | ||
f7ef9339 | 15126 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
15127 | specification allows the initial length to take up either 4 bytes |
15128 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
15129 | bytes describe the length and all offsets will be 8 bytes in length | |
15130 | instead of 4. | |
15131 | ||
f7ef9339 KB |
15132 | An older, non-standard 64-bit format is also handled by this |
15133 | function. The older format in question stores the initial length | |
15134 | as an 8-byte quantity without an escape value. Lengths greater | |
15135 | than 2^32 aren't very common which means that the initial 4 bytes | |
15136 | is almost always zero. Since a length value of zero doesn't make | |
15137 | sense for the 32-bit format, this initial zero can be considered to | |
15138 | be an escape value which indicates the presence of the older 64-bit | |
15139 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
15140 | greater than 4GB. If it becomes necessary to handle lengths |
15141 | somewhat larger than 4GB, we could allow other small values (such | |
15142 | as the non-sensical values of 1, 2, and 3) to also be used as | |
15143 | escape values indicating the presence of the old format. | |
f7ef9339 | 15144 | |
917c78fc MK |
15145 | The value returned via bytes_read should be used to increment the |
15146 | relevant pointer after calling read_initial_length(). | |
c764a876 | 15147 | |
613e1657 KB |
15148 | [ Note: read_initial_length() and read_offset() are based on the |
15149 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 15150 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
15151 | from: |
15152 | ||
f7ef9339 | 15153 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 15154 | |
613e1657 KB |
15155 | This document is only a draft and is subject to change. (So beware.) |
15156 | ||
f7ef9339 | 15157 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
15158 | determined empirically by examining 64-bit ELF files produced by |
15159 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
15160 | |
15161 | - Kevin, July 16, 2002 | |
613e1657 KB |
15162 | ] */ |
15163 | ||
15164 | static LONGEST | |
d521ce57 | 15165 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 15166 | { |
fe1b8b76 | 15167 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 15168 | |
dd373385 | 15169 | if (length == 0xffffffff) |
613e1657 | 15170 | { |
fe1b8b76 | 15171 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 15172 | *bytes_read = 12; |
613e1657 | 15173 | } |
dd373385 | 15174 | else if (length == 0) |
f7ef9339 | 15175 | { |
dd373385 | 15176 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 15177 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 15178 | *bytes_read = 8; |
f7ef9339 | 15179 | } |
613e1657 KB |
15180 | else |
15181 | { | |
15182 | *bytes_read = 4; | |
613e1657 KB |
15183 | } |
15184 | ||
c764a876 DE |
15185 | return length; |
15186 | } | |
dd373385 | 15187 | |
c764a876 DE |
15188 | /* Cover function for read_initial_length. |
15189 | Returns the length of the object at BUF, and stores the size of the | |
15190 | initial length in *BYTES_READ and stores the size that offsets will be in | |
15191 | *OFFSET_SIZE. | |
15192 | If the initial length size is not equivalent to that specified in | |
15193 | CU_HEADER then issue a complaint. | |
15194 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 15195 | |
c764a876 | 15196 | static LONGEST |
d521ce57 | 15197 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
15198 | const struct comp_unit_head *cu_header, |
15199 | unsigned int *bytes_read, | |
15200 | unsigned int *offset_size) | |
15201 | { | |
15202 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
15203 | ||
15204 | gdb_assert (cu_header->initial_length_size == 4 | |
15205 | || cu_header->initial_length_size == 8 | |
15206 | || cu_header->initial_length_size == 12); | |
15207 | ||
15208 | if (cu_header->initial_length_size != *bytes_read) | |
15209 | complaint (&symfile_complaints, | |
15210 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 15211 | |
c764a876 | 15212 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 15213 | return length; |
613e1657 KB |
15214 | } |
15215 | ||
15216 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 15217 | given by cu_header->offset_size. */ |
613e1657 KB |
15218 | |
15219 | static LONGEST | |
d521ce57 TT |
15220 | read_offset (bfd *abfd, const gdb_byte *buf, |
15221 | const struct comp_unit_head *cu_header, | |
891d2f0b | 15222 | unsigned int *bytes_read) |
c764a876 DE |
15223 | { |
15224 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 15225 | |
c764a876 DE |
15226 | *bytes_read = cu_header->offset_size; |
15227 | return offset; | |
15228 | } | |
15229 | ||
15230 | /* Read an offset from the data stream. */ | |
15231 | ||
15232 | static LONGEST | |
d521ce57 | 15233 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
15234 | { |
15235 | LONGEST retval = 0; | |
15236 | ||
c764a876 | 15237 | switch (offset_size) |
613e1657 KB |
15238 | { |
15239 | case 4: | |
fe1b8b76 | 15240 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
15241 | break; |
15242 | case 8: | |
fe1b8b76 | 15243 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
15244 | break; |
15245 | default: | |
8e65ff28 | 15246 | internal_error (__FILE__, __LINE__, |
c764a876 | 15247 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 15248 | bfd_get_filename (abfd)); |
613e1657 KB |
15249 | } |
15250 | ||
917c78fc | 15251 | return retval; |
613e1657 KB |
15252 | } |
15253 | ||
d521ce57 TT |
15254 | static const gdb_byte * |
15255 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
15256 | { |
15257 | /* If the size of a host char is 8 bits, we can return a pointer | |
15258 | to the buffer, otherwise we have to copy the data to a buffer | |
15259 | allocated on the temporary obstack. */ | |
4bdf3d34 | 15260 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 15261 | return buf; |
c906108c SS |
15262 | } |
15263 | ||
d521ce57 TT |
15264 | static const char * |
15265 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
15266 | unsigned int *bytes_read_ptr) | |
c906108c SS |
15267 | { |
15268 | /* If the size of a host char is 8 bits, we can return a pointer | |
15269 | to the string, otherwise we have to copy the string to a buffer | |
15270 | allocated on the temporary obstack. */ | |
4bdf3d34 | 15271 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
15272 | if (*buf == '\0') |
15273 | { | |
15274 | *bytes_read_ptr = 1; | |
15275 | return NULL; | |
15276 | } | |
d521ce57 TT |
15277 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
15278 | return (const char *) buf; | |
4bdf3d34 JJ |
15279 | } |
15280 | ||
d521ce57 | 15281 | static const char * |
cf2c3c16 | 15282 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 15283 | { |
be391dca | 15284 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 15285 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
15286 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
15287 | bfd_get_filename (abfd)); | |
dce234bc | 15288 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
15289 | error (_("DW_FORM_strp pointing outside of " |
15290 | ".debug_str section [in module %s]"), | |
15291 | bfd_get_filename (abfd)); | |
4bdf3d34 | 15292 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 15293 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 15294 | return NULL; |
d521ce57 | 15295 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
15296 | } |
15297 | ||
36586728 TT |
15298 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
15299 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
15300 | the string consists of a single NUL byte, return NULL; otherwise | |
15301 | return a pointer to the string. */ | |
15302 | ||
d521ce57 | 15303 | static const char * |
36586728 TT |
15304 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
15305 | { | |
15306 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
15307 | ||
15308 | if (dwz->str.buffer == NULL) | |
15309 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
15310 | "section [in module %s]"), | |
15311 | bfd_get_filename (dwz->dwz_bfd)); | |
15312 | if (str_offset >= dwz->str.size) | |
15313 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
15314 | ".debug_str section [in module %s]"), | |
15315 | bfd_get_filename (dwz->dwz_bfd)); | |
15316 | gdb_assert (HOST_CHAR_BIT == 8); | |
15317 | if (dwz->str.buffer[str_offset] == '\0') | |
15318 | return NULL; | |
d521ce57 | 15319 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
15320 | } |
15321 | ||
d521ce57 TT |
15322 | static const char * |
15323 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
15324 | const struct comp_unit_head *cu_header, |
15325 | unsigned int *bytes_read_ptr) | |
15326 | { | |
15327 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
15328 | ||
15329 | return read_indirect_string_at_offset (abfd, str_offset); | |
15330 | } | |
15331 | ||
12df843f | 15332 | static ULONGEST |
d521ce57 TT |
15333 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
15334 | unsigned int *bytes_read_ptr) | |
c906108c | 15335 | { |
12df843f | 15336 | ULONGEST result; |
ce5d95e1 | 15337 | unsigned int num_read; |
c906108c SS |
15338 | int i, shift; |
15339 | unsigned char byte; | |
15340 | ||
15341 | result = 0; | |
15342 | shift = 0; | |
15343 | num_read = 0; | |
15344 | i = 0; | |
15345 | while (1) | |
15346 | { | |
fe1b8b76 | 15347 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
15348 | buf++; |
15349 | num_read++; | |
12df843f | 15350 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
15351 | if ((byte & 128) == 0) |
15352 | { | |
15353 | break; | |
15354 | } | |
15355 | shift += 7; | |
15356 | } | |
15357 | *bytes_read_ptr = num_read; | |
15358 | return result; | |
15359 | } | |
15360 | ||
12df843f | 15361 | static LONGEST |
d521ce57 TT |
15362 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
15363 | unsigned int *bytes_read_ptr) | |
c906108c | 15364 | { |
12df843f | 15365 | LONGEST result; |
77e0b926 | 15366 | int i, shift, num_read; |
c906108c SS |
15367 | unsigned char byte; |
15368 | ||
15369 | result = 0; | |
15370 | shift = 0; | |
c906108c SS |
15371 | num_read = 0; |
15372 | i = 0; | |
15373 | while (1) | |
15374 | { | |
fe1b8b76 | 15375 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
15376 | buf++; |
15377 | num_read++; | |
12df843f | 15378 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
15379 | shift += 7; |
15380 | if ((byte & 128) == 0) | |
15381 | { | |
15382 | break; | |
15383 | } | |
15384 | } | |
77e0b926 | 15385 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 15386 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
15387 | *bytes_read_ptr = num_read; |
15388 | return result; | |
15389 | } | |
15390 | ||
3019eac3 DE |
15391 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
15392 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
15393 | ADDR_SIZE is the size of addresses from the CU header. */ | |
15394 | ||
15395 | static CORE_ADDR | |
15396 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
15397 | { | |
15398 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
15399 | bfd *abfd = objfile->obfd; | |
15400 | const gdb_byte *info_ptr; | |
15401 | ||
15402 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
15403 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
15404 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 15405 | objfile_name (objfile)); |
3019eac3 DE |
15406 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
15407 | error (_("DW_FORM_addr_index pointing outside of " | |
15408 | ".debug_addr section [in module %s]"), | |
4262abfb | 15409 | objfile_name (objfile)); |
3019eac3 DE |
15410 | info_ptr = (dwarf2_per_objfile->addr.buffer |
15411 | + addr_base + addr_index * addr_size); | |
15412 | if (addr_size == 4) | |
15413 | return bfd_get_32 (abfd, info_ptr); | |
15414 | else | |
15415 | return bfd_get_64 (abfd, info_ptr); | |
15416 | } | |
15417 | ||
15418 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
15419 | ||
15420 | static CORE_ADDR | |
15421 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
15422 | { | |
15423 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
15424 | } | |
15425 | ||
15426 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
15427 | ||
15428 | static CORE_ADDR | |
d521ce57 | 15429 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
15430 | unsigned int *bytes_read) |
15431 | { | |
15432 | bfd *abfd = cu->objfile->obfd; | |
15433 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
15434 | ||
15435 | return read_addr_index (cu, addr_index); | |
15436 | } | |
15437 | ||
15438 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
15439 | back to dwarf2_read_addr_index. */ | |
15440 | ||
15441 | struct dwarf2_read_addr_index_data | |
15442 | { | |
15443 | ULONGEST addr_base; | |
15444 | int addr_size; | |
15445 | }; | |
15446 | ||
15447 | /* die_reader_func for dwarf2_read_addr_index. */ | |
15448 | ||
15449 | static void | |
15450 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 15451 | const gdb_byte *info_ptr, |
3019eac3 DE |
15452 | struct die_info *comp_unit_die, |
15453 | int has_children, | |
15454 | void *data) | |
15455 | { | |
15456 | struct dwarf2_cu *cu = reader->cu; | |
15457 | struct dwarf2_read_addr_index_data *aidata = | |
15458 | (struct dwarf2_read_addr_index_data *) data; | |
15459 | ||
15460 | aidata->addr_base = cu->addr_base; | |
15461 | aidata->addr_size = cu->header.addr_size; | |
15462 | } | |
15463 | ||
15464 | /* Given an index in .debug_addr, fetch the value. | |
15465 | NOTE: This can be called during dwarf expression evaluation, | |
15466 | long after the debug information has been read, and thus per_cu->cu | |
15467 | may no longer exist. */ | |
15468 | ||
15469 | CORE_ADDR | |
15470 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
15471 | unsigned int addr_index) | |
15472 | { | |
15473 | struct objfile *objfile = per_cu->objfile; | |
15474 | struct dwarf2_cu *cu = per_cu->cu; | |
15475 | ULONGEST addr_base; | |
15476 | int addr_size; | |
15477 | ||
15478 | /* This is intended to be called from outside this file. */ | |
15479 | dw2_setup (objfile); | |
15480 | ||
15481 | /* We need addr_base and addr_size. | |
15482 | If we don't have PER_CU->cu, we have to get it. | |
15483 | Nasty, but the alternative is storing the needed info in PER_CU, | |
15484 | which at this point doesn't seem justified: it's not clear how frequently | |
15485 | it would get used and it would increase the size of every PER_CU. | |
15486 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
15487 | so we're not in uncharted territory here. | |
15488 | Alas we need to be a bit more complicated as addr_base is contained | |
15489 | in the DIE. | |
15490 | ||
15491 | We don't need to read the entire CU(/TU). | |
15492 | We just need the header and top level die. | |
a1b64ce1 | 15493 | |
3019eac3 | 15494 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 15495 | For now we skip this optimization. */ |
3019eac3 DE |
15496 | |
15497 | if (cu != NULL) | |
15498 | { | |
15499 | addr_base = cu->addr_base; | |
15500 | addr_size = cu->header.addr_size; | |
15501 | } | |
15502 | else | |
15503 | { | |
15504 | struct dwarf2_read_addr_index_data aidata; | |
15505 | ||
a1b64ce1 DE |
15506 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
15507 | we need addr_base. */ | |
15508 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
15509 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
15510 | addr_base = aidata.addr_base; |
15511 | addr_size = aidata.addr_size; | |
15512 | } | |
15513 | ||
15514 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
15515 | } | |
15516 | ||
57d63ce2 DE |
15517 | /* Given a DW_FORM_GNU_str_index, fetch the string. |
15518 | This is only used by the Fission support. */ | |
3019eac3 | 15519 | |
d521ce57 | 15520 | static const char * |
3019eac3 DE |
15521 | read_str_index (const struct die_reader_specs *reader, |
15522 | struct dwarf2_cu *cu, ULONGEST str_index) | |
15523 | { | |
15524 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4262abfb | 15525 | const char *dwo_name = objfile_name (objfile); |
3019eac3 DE |
15526 | bfd *abfd = objfile->obfd; |
15527 | struct dwo_sections *sections = &reader->dwo_file->sections; | |
d521ce57 | 15528 | const gdb_byte *info_ptr; |
3019eac3 | 15529 | ULONGEST str_offset; |
57d63ce2 | 15530 | static const char form_name[] = "DW_FORM_GNU_str_index"; |
3019eac3 DE |
15531 | |
15532 | dwarf2_read_section (objfile, §ions->str); | |
15533 | dwarf2_read_section (objfile, §ions->str_offsets); | |
15534 | if (sections->str.buffer == NULL) | |
57d63ce2 | 15535 | error (_("%s used without .debug_str.dwo section" |
3019eac3 | 15536 | " in CU at offset 0x%lx [in module %s]"), |
57d63ce2 | 15537 | form_name, (long) cu->header.offset.sect_off, dwo_name); |
3019eac3 | 15538 | if (sections->str_offsets.buffer == NULL) |
57d63ce2 | 15539 | error (_("%s used without .debug_str_offsets.dwo section" |
3019eac3 | 15540 | " in CU at offset 0x%lx [in module %s]"), |
57d63ce2 | 15541 | form_name, (long) cu->header.offset.sect_off, dwo_name); |
3019eac3 | 15542 | if (str_index * cu->header.offset_size >= sections->str_offsets.size) |
57d63ce2 | 15543 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
3019eac3 | 15544 | " section in CU at offset 0x%lx [in module %s]"), |
57d63ce2 | 15545 | form_name, (long) cu->header.offset.sect_off, dwo_name); |
3019eac3 DE |
15546 | info_ptr = (sections->str_offsets.buffer |
15547 | + str_index * cu->header.offset_size); | |
15548 | if (cu->header.offset_size == 4) | |
15549 | str_offset = bfd_get_32 (abfd, info_ptr); | |
15550 | else | |
15551 | str_offset = bfd_get_64 (abfd, info_ptr); | |
15552 | if (str_offset >= sections->str.size) | |
57d63ce2 | 15553 | error (_("Offset from %s pointing outside of" |
3019eac3 | 15554 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), |
57d63ce2 | 15555 | form_name, (long) cu->header.offset.sect_off, dwo_name); |
d521ce57 | 15556 | return (const char *) (sections->str.buffer + str_offset); |
3019eac3 DE |
15557 | } |
15558 | ||
3019eac3 DE |
15559 | /* Return the length of an LEB128 number in BUF. */ |
15560 | ||
15561 | static int | |
15562 | leb128_size (const gdb_byte *buf) | |
15563 | { | |
15564 | const gdb_byte *begin = buf; | |
15565 | gdb_byte byte; | |
15566 | ||
15567 | while (1) | |
15568 | { | |
15569 | byte = *buf++; | |
15570 | if ((byte & 128) == 0) | |
15571 | return buf - begin; | |
15572 | } | |
15573 | } | |
15574 | ||
c906108c | 15575 | static void |
e142c38c | 15576 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
15577 | { |
15578 | switch (lang) | |
15579 | { | |
15580 | case DW_LANG_C89: | |
76bee0cc | 15581 | case DW_LANG_C99: |
c906108c | 15582 | case DW_LANG_C: |
d1be3247 | 15583 | case DW_LANG_UPC: |
e142c38c | 15584 | cu->language = language_c; |
c906108c SS |
15585 | break; |
15586 | case DW_LANG_C_plus_plus: | |
e142c38c | 15587 | cu->language = language_cplus; |
c906108c | 15588 | break; |
6aecb9c2 JB |
15589 | case DW_LANG_D: |
15590 | cu->language = language_d; | |
15591 | break; | |
c906108c SS |
15592 | case DW_LANG_Fortran77: |
15593 | case DW_LANG_Fortran90: | |
b21b22e0 | 15594 | case DW_LANG_Fortran95: |
e142c38c | 15595 | cu->language = language_fortran; |
c906108c | 15596 | break; |
a766d390 DE |
15597 | case DW_LANG_Go: |
15598 | cu->language = language_go; | |
15599 | break; | |
c906108c | 15600 | case DW_LANG_Mips_Assembler: |
e142c38c | 15601 | cu->language = language_asm; |
c906108c | 15602 | break; |
bebd888e | 15603 | case DW_LANG_Java: |
e142c38c | 15604 | cu->language = language_java; |
bebd888e | 15605 | break; |
c906108c | 15606 | case DW_LANG_Ada83: |
8aaf0b47 | 15607 | case DW_LANG_Ada95: |
bc5f45f8 JB |
15608 | cu->language = language_ada; |
15609 | break; | |
72019c9c GM |
15610 | case DW_LANG_Modula2: |
15611 | cu->language = language_m2; | |
15612 | break; | |
fe8e67fd PM |
15613 | case DW_LANG_Pascal83: |
15614 | cu->language = language_pascal; | |
15615 | break; | |
22566fbd DJ |
15616 | case DW_LANG_ObjC: |
15617 | cu->language = language_objc; | |
15618 | break; | |
c906108c SS |
15619 | case DW_LANG_Cobol74: |
15620 | case DW_LANG_Cobol85: | |
c906108c | 15621 | default: |
e142c38c | 15622 | cu->language = language_minimal; |
c906108c SS |
15623 | break; |
15624 | } | |
e142c38c | 15625 | cu->language_defn = language_def (cu->language); |
c906108c SS |
15626 | } |
15627 | ||
15628 | /* Return the named attribute or NULL if not there. */ | |
15629 | ||
15630 | static struct attribute * | |
e142c38c | 15631 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 15632 | { |
a48e046c | 15633 | for (;;) |
c906108c | 15634 | { |
a48e046c TT |
15635 | unsigned int i; |
15636 | struct attribute *spec = NULL; | |
15637 | ||
15638 | for (i = 0; i < die->num_attrs; ++i) | |
15639 | { | |
15640 | if (die->attrs[i].name == name) | |
15641 | return &die->attrs[i]; | |
15642 | if (die->attrs[i].name == DW_AT_specification | |
15643 | || die->attrs[i].name == DW_AT_abstract_origin) | |
15644 | spec = &die->attrs[i]; | |
15645 | } | |
15646 | ||
15647 | if (!spec) | |
15648 | break; | |
c906108c | 15649 | |
f2f0e013 | 15650 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 15651 | } |
c5aa993b | 15652 | |
c906108c SS |
15653 | return NULL; |
15654 | } | |
15655 | ||
348e048f DE |
15656 | /* Return the named attribute or NULL if not there, |
15657 | but do not follow DW_AT_specification, etc. | |
15658 | This is for use in contexts where we're reading .debug_types dies. | |
15659 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
15660 | back up the chain, and we want to go down. */ | |
15661 | ||
15662 | static struct attribute * | |
45e58e77 | 15663 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
15664 | { |
15665 | unsigned int i; | |
15666 | ||
15667 | for (i = 0; i < die->num_attrs; ++i) | |
15668 | if (die->attrs[i].name == name) | |
15669 | return &die->attrs[i]; | |
15670 | ||
15671 | return NULL; | |
15672 | } | |
15673 | ||
05cf31d1 JB |
15674 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
15675 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 15676 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
15677 | |
15678 | static int | |
15679 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
15680 | { | |
15681 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
15682 | ||
15683 | return (attr && DW_UNSND (attr)); | |
15684 | } | |
15685 | ||
3ca72b44 | 15686 | static int |
e142c38c | 15687 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 15688 | { |
05cf31d1 JB |
15689 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
15690 | which value is non-zero. However, we have to be careful with | |
15691 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
15692 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
15693 | end up accidently finding a declaration attribute that belongs | |
15694 | to a different DIE referenced by the specification attribute, | |
15695 | even though the given DIE does not have a declaration attribute. */ | |
15696 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
15697 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
15698 | } |
15699 | ||
63d06c5c | 15700 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 15701 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
15702 | containing the return value on output. If there is no |
15703 | specification, but there is an abstract origin, that is | |
15704 | returned. */ | |
63d06c5c DC |
15705 | |
15706 | static struct die_info * | |
f2f0e013 | 15707 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 15708 | { |
f2f0e013 DJ |
15709 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
15710 | *spec_cu); | |
63d06c5c | 15711 | |
edb3359d DJ |
15712 | if (spec_attr == NULL) |
15713 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
15714 | ||
63d06c5c DC |
15715 | if (spec_attr == NULL) |
15716 | return NULL; | |
15717 | else | |
f2f0e013 | 15718 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 15719 | } |
c906108c | 15720 | |
debd256d | 15721 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
15722 | refers to. |
15723 | NOTE: This is also used as a "cleanup" function. */ | |
15724 | ||
debd256d JB |
15725 | static void |
15726 | free_line_header (struct line_header *lh) | |
15727 | { | |
15728 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 15729 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
15730 | |
15731 | /* Remember that all the lh->file_names[i].name pointers are | |
15732 | pointers into debug_line_buffer, and don't need to be freed. */ | |
15733 | if (lh->file_names) | |
a8bc7b56 | 15734 | xfree (lh->file_names); |
debd256d JB |
15735 | |
15736 | /* Similarly for the include directory names. */ | |
15737 | if (lh->include_dirs) | |
a8bc7b56 | 15738 | xfree (lh->include_dirs); |
debd256d | 15739 | |
a8bc7b56 | 15740 | xfree (lh); |
debd256d JB |
15741 | } |
15742 | ||
debd256d | 15743 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 15744 | |
debd256d | 15745 | static void |
d521ce57 | 15746 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 15747 | { |
debd256d JB |
15748 | /* Grow the array if necessary. */ |
15749 | if (lh->include_dirs_size == 0) | |
c5aa993b | 15750 | { |
debd256d JB |
15751 | lh->include_dirs_size = 1; /* for testing */ |
15752 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
15753 | * sizeof (*lh->include_dirs)); | |
15754 | } | |
15755 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
15756 | { | |
15757 | lh->include_dirs_size *= 2; | |
15758 | lh->include_dirs = xrealloc (lh->include_dirs, | |
15759 | (lh->include_dirs_size | |
15760 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 15761 | } |
c906108c | 15762 | |
debd256d JB |
15763 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
15764 | } | |
6e70227d | 15765 | |
debd256d | 15766 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 15767 | |
debd256d JB |
15768 | static void |
15769 | add_file_name (struct line_header *lh, | |
d521ce57 | 15770 | const char *name, |
debd256d JB |
15771 | unsigned int dir_index, |
15772 | unsigned int mod_time, | |
15773 | unsigned int length) | |
15774 | { | |
15775 | struct file_entry *fe; | |
15776 | ||
15777 | /* Grow the array if necessary. */ | |
15778 | if (lh->file_names_size == 0) | |
15779 | { | |
15780 | lh->file_names_size = 1; /* for testing */ | |
15781 | lh->file_names = xmalloc (lh->file_names_size | |
15782 | * sizeof (*lh->file_names)); | |
15783 | } | |
15784 | else if (lh->num_file_names >= lh->file_names_size) | |
15785 | { | |
15786 | lh->file_names_size *= 2; | |
15787 | lh->file_names = xrealloc (lh->file_names, | |
15788 | (lh->file_names_size | |
15789 | * sizeof (*lh->file_names))); | |
15790 | } | |
15791 | ||
15792 | fe = &lh->file_names[lh->num_file_names++]; | |
15793 | fe->name = name; | |
15794 | fe->dir_index = dir_index; | |
15795 | fe->mod_time = mod_time; | |
15796 | fe->length = length; | |
aaa75496 | 15797 | fe->included_p = 0; |
cb1df416 | 15798 | fe->symtab = NULL; |
debd256d | 15799 | } |
6e70227d | 15800 | |
36586728 TT |
15801 | /* A convenience function to find the proper .debug_line section for a |
15802 | CU. */ | |
15803 | ||
15804 | static struct dwarf2_section_info * | |
15805 | get_debug_line_section (struct dwarf2_cu *cu) | |
15806 | { | |
15807 | struct dwarf2_section_info *section; | |
15808 | ||
15809 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
15810 | DWO file. */ | |
15811 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
15812 | section = &cu->dwo_unit->dwo_file->sections.line; | |
15813 | else if (cu->per_cu->is_dwz) | |
15814 | { | |
15815 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
15816 | ||
15817 | section = &dwz->line; | |
15818 | } | |
15819 | else | |
15820 | section = &dwarf2_per_objfile->line; | |
15821 | ||
15822 | return section; | |
15823 | } | |
15824 | ||
debd256d | 15825 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 15826 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 15827 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
15828 | |
15829 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
15830 | the returned object point into the dwarf line section buffer, |
15831 | and must not be freed. */ | |
ae2de4f8 | 15832 | |
debd256d | 15833 | static struct line_header * |
3019eac3 | 15834 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
15835 | { |
15836 | struct cleanup *back_to; | |
15837 | struct line_header *lh; | |
d521ce57 | 15838 | const gdb_byte *line_ptr; |
c764a876 | 15839 | unsigned int bytes_read, offset_size; |
debd256d | 15840 | int i; |
d521ce57 | 15841 | const char *cur_dir, *cur_file; |
3019eac3 DE |
15842 | struct dwarf2_section_info *section; |
15843 | bfd *abfd; | |
15844 | ||
36586728 | 15845 | section = get_debug_line_section (cu); |
3019eac3 DE |
15846 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
15847 | if (section->buffer == NULL) | |
debd256d | 15848 | { |
3019eac3 DE |
15849 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
15850 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
15851 | else | |
15852 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
15853 | return 0; |
15854 | } | |
15855 | ||
fceca515 DE |
15856 | /* We can't do this until we know the section is non-empty. |
15857 | Only then do we know we have such a section. */ | |
a32a8923 | 15858 | abfd = get_section_bfd_owner (section); |
fceca515 | 15859 | |
a738430d MK |
15860 | /* Make sure that at least there's room for the total_length field. |
15861 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 15862 | if (offset + 4 >= section->size) |
debd256d | 15863 | { |
4d3c2250 | 15864 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
15865 | return 0; |
15866 | } | |
15867 | ||
15868 | lh = xmalloc (sizeof (*lh)); | |
15869 | memset (lh, 0, sizeof (*lh)); | |
15870 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
15871 | (void *) lh); | |
15872 | ||
3019eac3 | 15873 | line_ptr = section->buffer + offset; |
debd256d | 15874 | |
a738430d | 15875 | /* Read in the header. */ |
6e70227d | 15876 | lh->total_length = |
c764a876 DE |
15877 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
15878 | &bytes_read, &offset_size); | |
debd256d | 15879 | line_ptr += bytes_read; |
3019eac3 | 15880 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 15881 | { |
4d3c2250 | 15882 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
2f324bf6 | 15883 | do_cleanups (back_to); |
debd256d JB |
15884 | return 0; |
15885 | } | |
15886 | lh->statement_program_end = line_ptr + lh->total_length; | |
15887 | lh->version = read_2_bytes (abfd, line_ptr); | |
15888 | line_ptr += 2; | |
c764a876 DE |
15889 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
15890 | line_ptr += offset_size; | |
debd256d JB |
15891 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
15892 | line_ptr += 1; | |
2dc7f7b3 TT |
15893 | if (lh->version >= 4) |
15894 | { | |
15895 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
15896 | line_ptr += 1; | |
15897 | } | |
15898 | else | |
15899 | lh->maximum_ops_per_instruction = 1; | |
15900 | ||
15901 | if (lh->maximum_ops_per_instruction == 0) | |
15902 | { | |
15903 | lh->maximum_ops_per_instruction = 1; | |
15904 | complaint (&symfile_complaints, | |
3e43a32a MS |
15905 | _("invalid maximum_ops_per_instruction " |
15906 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
15907 | } |
15908 | ||
debd256d JB |
15909 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
15910 | line_ptr += 1; | |
15911 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
15912 | line_ptr += 1; | |
15913 | lh->line_range = read_1_byte (abfd, line_ptr); | |
15914 | line_ptr += 1; | |
15915 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
15916 | line_ptr += 1; | |
15917 | lh->standard_opcode_lengths | |
fe1b8b76 | 15918 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
15919 | |
15920 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
15921 | for (i = 1; i < lh->opcode_base; ++i) | |
15922 | { | |
15923 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
15924 | line_ptr += 1; | |
15925 | } | |
15926 | ||
a738430d | 15927 | /* Read directory table. */ |
9b1c24c8 | 15928 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15929 | { |
15930 | line_ptr += bytes_read; | |
15931 | add_include_dir (lh, cur_dir); | |
15932 | } | |
15933 | line_ptr += bytes_read; | |
15934 | ||
a738430d | 15935 | /* Read file name table. */ |
9b1c24c8 | 15936 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15937 | { |
15938 | unsigned int dir_index, mod_time, length; | |
15939 | ||
15940 | line_ptr += bytes_read; | |
15941 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15942 | line_ptr += bytes_read; | |
15943 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15944 | line_ptr += bytes_read; | |
15945 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15946 | line_ptr += bytes_read; | |
15947 | ||
15948 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15949 | } | |
15950 | line_ptr += bytes_read; | |
6e70227d | 15951 | lh->statement_program_start = line_ptr; |
debd256d | 15952 | |
3019eac3 | 15953 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 15954 | complaint (&symfile_complaints, |
3e43a32a MS |
15955 | _("line number info header doesn't " |
15956 | "fit in `.debug_line' section")); | |
debd256d JB |
15957 | |
15958 | discard_cleanups (back_to); | |
15959 | return lh; | |
15960 | } | |
c906108c | 15961 | |
c6da4cef DE |
15962 | /* Subroutine of dwarf_decode_lines to simplify it. |
15963 | Return the file name of the psymtab for included file FILE_INDEX | |
15964 | in line header LH of PST. | |
15965 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15966 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
15967 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
15968 | ||
15969 | The function creates dangling cleanup registration. */ | |
c6da4cef | 15970 | |
d521ce57 | 15971 | static const char * |
c6da4cef DE |
15972 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
15973 | const struct partial_symtab *pst, | |
15974 | const char *comp_dir) | |
15975 | { | |
15976 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
15977 | const char *include_name = fe.name; |
15978 | const char *include_name_to_compare = include_name; | |
15979 | const char *dir_name = NULL; | |
72b9f47f TT |
15980 | const char *pst_filename; |
15981 | char *copied_name = NULL; | |
c6da4cef DE |
15982 | int file_is_pst; |
15983 | ||
15984 | if (fe.dir_index) | |
15985 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
15986 | ||
15987 | if (!IS_ABSOLUTE_PATH (include_name) | |
15988 | && (dir_name != NULL || comp_dir != NULL)) | |
15989 | { | |
15990 | /* Avoid creating a duplicate psymtab for PST. | |
15991 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
15992 | Before we do the comparison, however, we need to account | |
15993 | for DIR_NAME and COMP_DIR. | |
15994 | First prepend dir_name (if non-NULL). If we still don't | |
15995 | have an absolute path prepend comp_dir (if non-NULL). | |
15996 | However, the directory we record in the include-file's | |
15997 | psymtab does not contain COMP_DIR (to match the | |
15998 | corresponding symtab(s)). | |
15999 | ||
16000 | Example: | |
16001 | ||
16002 | bash$ cd /tmp | |
16003 | bash$ gcc -g ./hello.c | |
16004 | include_name = "hello.c" | |
16005 | dir_name = "." | |
16006 | DW_AT_comp_dir = comp_dir = "/tmp" | |
16007 | DW_AT_name = "./hello.c" */ | |
16008 | ||
16009 | if (dir_name != NULL) | |
16010 | { | |
d521ce57 TT |
16011 | char *tem = concat (dir_name, SLASH_STRING, |
16012 | include_name, (char *)NULL); | |
16013 | ||
16014 | make_cleanup (xfree, tem); | |
16015 | include_name = tem; | |
c6da4cef | 16016 | include_name_to_compare = include_name; |
c6da4cef DE |
16017 | } |
16018 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
16019 | { | |
d521ce57 TT |
16020 | char *tem = concat (comp_dir, SLASH_STRING, |
16021 | include_name, (char *)NULL); | |
16022 | ||
16023 | make_cleanup (xfree, tem); | |
16024 | include_name_to_compare = tem; | |
c6da4cef DE |
16025 | } |
16026 | } | |
16027 | ||
16028 | pst_filename = pst->filename; | |
16029 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
16030 | { | |
72b9f47f TT |
16031 | copied_name = concat (pst->dirname, SLASH_STRING, |
16032 | pst_filename, (char *)NULL); | |
16033 | pst_filename = copied_name; | |
c6da4cef DE |
16034 | } |
16035 | ||
1e3fad37 | 16036 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 16037 | |
72b9f47f TT |
16038 | if (copied_name != NULL) |
16039 | xfree (copied_name); | |
c6da4cef DE |
16040 | |
16041 | if (file_is_pst) | |
16042 | return NULL; | |
16043 | return include_name; | |
16044 | } | |
16045 | ||
c91513d8 PP |
16046 | /* Ignore this record_line request. */ |
16047 | ||
16048 | static void | |
16049 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
16050 | { | |
16051 | return; | |
16052 | } | |
16053 | ||
f3f5162e DE |
16054 | /* Subroutine of dwarf_decode_lines to simplify it. |
16055 | Process the line number information in LH. */ | |
debd256d | 16056 | |
c906108c | 16057 | static void |
f3f5162e DE |
16058 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
16059 | struct dwarf2_cu *cu, struct partial_symtab *pst) | |
c906108c | 16060 | { |
d521ce57 TT |
16061 | const gdb_byte *line_ptr, *extended_end; |
16062 | const gdb_byte *line_end; | |
a8c50c1f | 16063 | unsigned int bytes_read, extended_len; |
c906108c | 16064 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
16065 | CORE_ADDR baseaddr; |
16066 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 16067 | bfd *abfd = objfile->obfd; |
fbf65064 | 16068 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 16069 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 16070 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
16071 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
16072 | = record_line; | |
e142c38c DJ |
16073 | |
16074 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 16075 | |
debd256d JB |
16076 | line_ptr = lh->statement_program_start; |
16077 | line_end = lh->statement_program_end; | |
c906108c SS |
16078 | |
16079 | /* Read the statement sequences until there's nothing left. */ | |
16080 | while (line_ptr < line_end) | |
16081 | { | |
16082 | /* state machine registers */ | |
16083 | CORE_ADDR address = 0; | |
16084 | unsigned int file = 1; | |
16085 | unsigned int line = 1; | |
16086 | unsigned int column = 0; | |
debd256d | 16087 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
16088 | int basic_block = 0; |
16089 | int end_sequence = 0; | |
fbf65064 | 16090 | CORE_ADDR addr; |
2dc7f7b3 | 16091 | unsigned char op_index = 0; |
c906108c | 16092 | |
aaa75496 | 16093 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 16094 | { |
aaa75496 | 16095 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
16096 | /* lh->include_dirs and lh->file_names are 0-based, but the |
16097 | directory and file name numbers in the statement program | |
16098 | are 1-based. */ | |
16099 | struct file_entry *fe = &lh->file_names[file - 1]; | |
d521ce57 | 16100 | const char *dir = NULL; |
a738430d | 16101 | |
debd256d JB |
16102 | if (fe->dir_index) |
16103 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
16104 | |
16105 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
16106 | } |
16107 | ||
a738430d | 16108 | /* Decode the table. */ |
c5aa993b | 16109 | while (!end_sequence) |
c906108c SS |
16110 | { |
16111 | op_code = read_1_byte (abfd, line_ptr); | |
16112 | line_ptr += 1; | |
59205f5a JB |
16113 | if (line_ptr > line_end) |
16114 | { | |
16115 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
16116 | break; | |
16117 | } | |
9aa1fe7e | 16118 | |
debd256d | 16119 | if (op_code >= lh->opcode_base) |
6e70227d | 16120 | { |
a738430d | 16121 | /* Special operand. */ |
debd256d | 16122 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
16123 | address += (((op_index + (adj_opcode / lh->line_range)) |
16124 | / lh->maximum_ops_per_instruction) | |
16125 | * lh->minimum_instruction_length); | |
16126 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
16127 | % lh->maximum_ops_per_instruction); | |
debd256d | 16128 | line += lh->line_base + (adj_opcode % lh->line_range); |
59205f5a | 16129 | if (lh->num_file_names < file || file == 0) |
25e43795 | 16130 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
16131 | /* For now we ignore lines not starting on an |
16132 | instruction boundary. */ | |
16133 | else if (op_index == 0) | |
25e43795 DJ |
16134 | { |
16135 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 16136 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
16137 | { |
16138 | if (last_subfile != current_subfile) | |
16139 | { | |
16140 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
16141 | if (last_subfile) | |
c91513d8 | 16142 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
16143 | last_subfile = current_subfile; |
16144 | } | |
25e43795 | 16145 | /* Append row to matrix using current values. */ |
7019d805 | 16146 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 16147 | (*p_record_line) (current_subfile, line, addr); |
366da635 | 16148 | } |
25e43795 | 16149 | } |
ca5f395d | 16150 | basic_block = 0; |
9aa1fe7e GK |
16151 | } |
16152 | else switch (op_code) | |
c906108c SS |
16153 | { |
16154 | case DW_LNS_extended_op: | |
3e43a32a MS |
16155 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
16156 | &bytes_read); | |
473b7be6 | 16157 | line_ptr += bytes_read; |
a8c50c1f | 16158 | extended_end = line_ptr + extended_len; |
c906108c SS |
16159 | extended_op = read_1_byte (abfd, line_ptr); |
16160 | line_ptr += 1; | |
16161 | switch (extended_op) | |
16162 | { | |
16163 | case DW_LNE_end_sequence: | |
c91513d8 | 16164 | p_record_line = record_line; |
c906108c | 16165 | end_sequence = 1; |
c906108c SS |
16166 | break; |
16167 | case DW_LNE_set_address: | |
e7c27a73 | 16168 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 PP |
16169 | |
16170 | if (address == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
16171 | { | |
16172 | /* This line table is for a function which has been | |
16173 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
16174 | ||
16175 | long line_offset | |
36586728 | 16176 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
16177 | |
16178 | complaint (&symfile_complaints, | |
16179 | _(".debug_line address at offset 0x%lx is 0 " | |
16180 | "[in module %s]"), | |
4262abfb | 16181 | line_offset, objfile_name (objfile)); |
c91513d8 PP |
16182 | p_record_line = noop_record_line; |
16183 | } | |
16184 | ||
2dc7f7b3 | 16185 | op_index = 0; |
107d2387 AC |
16186 | line_ptr += bytes_read; |
16187 | address += baseaddr; | |
c906108c SS |
16188 | break; |
16189 | case DW_LNE_define_file: | |
debd256d | 16190 | { |
d521ce57 | 16191 | const char *cur_file; |
debd256d | 16192 | unsigned int dir_index, mod_time, length; |
6e70227d | 16193 | |
3e43a32a MS |
16194 | cur_file = read_direct_string (abfd, line_ptr, |
16195 | &bytes_read); | |
debd256d JB |
16196 | line_ptr += bytes_read; |
16197 | dir_index = | |
16198 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16199 | line_ptr += bytes_read; | |
16200 | mod_time = | |
16201 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16202 | line_ptr += bytes_read; | |
16203 | length = | |
16204 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16205 | line_ptr += bytes_read; | |
16206 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
16207 | } | |
c906108c | 16208 | break; |
d0c6ba3d CC |
16209 | case DW_LNE_set_discriminator: |
16210 | /* The discriminator is not interesting to the debugger; | |
16211 | just ignore it. */ | |
16212 | line_ptr = extended_end; | |
16213 | break; | |
c906108c | 16214 | default: |
4d3c2250 | 16215 | complaint (&symfile_complaints, |
e2e0b3e5 | 16216 | _("mangled .debug_line section")); |
debd256d | 16217 | return; |
c906108c | 16218 | } |
a8c50c1f DJ |
16219 | /* Make sure that we parsed the extended op correctly. If e.g. |
16220 | we expected a different address size than the producer used, | |
16221 | we may have read the wrong number of bytes. */ | |
16222 | if (line_ptr != extended_end) | |
16223 | { | |
16224 | complaint (&symfile_complaints, | |
16225 | _("mangled .debug_line section")); | |
16226 | return; | |
16227 | } | |
c906108c SS |
16228 | break; |
16229 | case DW_LNS_copy: | |
59205f5a | 16230 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
16231 | dwarf2_debug_line_missing_file_complaint (); |
16232 | else | |
366da635 | 16233 | { |
25e43795 | 16234 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 16235 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
16236 | { |
16237 | if (last_subfile != current_subfile) | |
16238 | { | |
16239 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
16240 | if (last_subfile) | |
c91513d8 | 16241 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
16242 | last_subfile = current_subfile; |
16243 | } | |
7019d805 | 16244 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 16245 | (*p_record_line) (current_subfile, line, addr); |
fbf65064 | 16246 | } |
366da635 | 16247 | } |
c906108c SS |
16248 | basic_block = 0; |
16249 | break; | |
16250 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
16251 | { |
16252 | CORE_ADDR adjust | |
16253 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16254 | ||
16255 | address += (((op_index + adjust) | |
16256 | / lh->maximum_ops_per_instruction) | |
16257 | * lh->minimum_instruction_length); | |
16258 | op_index = ((op_index + adjust) | |
16259 | % lh->maximum_ops_per_instruction); | |
16260 | line_ptr += bytes_read; | |
16261 | } | |
c906108c SS |
16262 | break; |
16263 | case DW_LNS_advance_line: | |
16264 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
16265 | line_ptr += bytes_read; | |
16266 | break; | |
16267 | case DW_LNS_set_file: | |
debd256d | 16268 | { |
a738430d MK |
16269 | /* The arrays lh->include_dirs and lh->file_names are |
16270 | 0-based, but the directory and file name numbers in | |
16271 | the statement program are 1-based. */ | |
debd256d | 16272 | struct file_entry *fe; |
d521ce57 | 16273 | const char *dir = NULL; |
a738430d | 16274 | |
debd256d JB |
16275 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
16276 | line_ptr += bytes_read; | |
59205f5a | 16277 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
16278 | dwarf2_debug_line_missing_file_complaint (); |
16279 | else | |
16280 | { | |
16281 | fe = &lh->file_names[file - 1]; | |
16282 | if (fe->dir_index) | |
16283 | dir = lh->include_dirs[fe->dir_index - 1]; | |
16284 | if (!decode_for_pst_p) | |
16285 | { | |
16286 | last_subfile = current_subfile; | |
16287 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
16288 | } | |
16289 | } | |
debd256d | 16290 | } |
c906108c SS |
16291 | break; |
16292 | case DW_LNS_set_column: | |
16293 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16294 | line_ptr += bytes_read; | |
16295 | break; | |
16296 | case DW_LNS_negate_stmt: | |
16297 | is_stmt = (!is_stmt); | |
16298 | break; | |
16299 | case DW_LNS_set_basic_block: | |
16300 | basic_block = 1; | |
16301 | break; | |
c2c6d25f JM |
16302 | /* Add to the address register of the state machine the |
16303 | address increment value corresponding to special opcode | |
a738430d MK |
16304 | 255. I.e., this value is scaled by the minimum |
16305 | instruction length since special opcode 255 would have | |
b021a221 | 16306 | scaled the increment. */ |
c906108c | 16307 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
16308 | { |
16309 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
16310 | ||
16311 | address += (((op_index + adjust) | |
16312 | / lh->maximum_ops_per_instruction) | |
16313 | * lh->minimum_instruction_length); | |
16314 | op_index = ((op_index + adjust) | |
16315 | % lh->maximum_ops_per_instruction); | |
16316 | } | |
c906108c SS |
16317 | break; |
16318 | case DW_LNS_fixed_advance_pc: | |
16319 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 16320 | op_index = 0; |
c906108c SS |
16321 | line_ptr += 2; |
16322 | break; | |
9aa1fe7e | 16323 | default: |
a738430d MK |
16324 | { |
16325 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 16326 | int i; |
a738430d | 16327 | |
debd256d | 16328 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
16329 | { |
16330 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
16331 | line_ptr += bytes_read; | |
16332 | } | |
16333 | } | |
c906108c SS |
16334 | } |
16335 | } | |
59205f5a JB |
16336 | if (lh->num_file_names < file || file == 0) |
16337 | dwarf2_debug_line_missing_file_complaint (); | |
16338 | else | |
16339 | { | |
16340 | lh->file_names[file - 1].included_p = 1; | |
16341 | if (!decode_for_pst_p) | |
fbf65064 UW |
16342 | { |
16343 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
c91513d8 | 16344 | (*p_record_line) (current_subfile, 0, addr); |
fbf65064 | 16345 | } |
59205f5a | 16346 | } |
c906108c | 16347 | } |
f3f5162e DE |
16348 | } |
16349 | ||
16350 | /* Decode the Line Number Program (LNP) for the given line_header | |
16351 | structure and CU. The actual information extracted and the type | |
16352 | of structures created from the LNP depends on the value of PST. | |
16353 | ||
16354 | 1. If PST is NULL, then this procedure uses the data from the program | |
16355 | to create all necessary symbol tables, and their linetables. | |
16356 | ||
16357 | 2. If PST is not NULL, this procedure reads the program to determine | |
16358 | the list of files included by the unit represented by PST, and | |
16359 | builds all the associated partial symbol tables. | |
16360 | ||
16361 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
16362 | It is used for relative paths in the line table. | |
16363 | NOTE: When processing partial symtabs (pst != NULL), | |
16364 | comp_dir == pst->dirname. | |
16365 | ||
16366 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
16367 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
16368 | symtab we don't use it in the name of the psymtabs we create. | |
16369 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
16370 | A good testcase for this is mb-inline.exp. */ | |
16371 | ||
16372 | static void | |
16373 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
16374 | struct dwarf2_cu *cu, struct partial_symtab *pst, | |
16375 | int want_line_info) | |
16376 | { | |
16377 | struct objfile *objfile = cu->objfile; | |
16378 | const int decode_for_pst_p = (pst != NULL); | |
16379 | struct subfile *first_subfile = current_subfile; | |
16380 | ||
16381 | if (want_line_info) | |
16382 | dwarf_decode_lines_1 (lh, comp_dir, cu, pst); | |
aaa75496 JB |
16383 | |
16384 | if (decode_for_pst_p) | |
16385 | { | |
16386 | int file_index; | |
16387 | ||
16388 | /* Now that we're done scanning the Line Header Program, we can | |
16389 | create the psymtab of each included file. */ | |
16390 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
16391 | if (lh->file_names[file_index].included_p == 1) | |
16392 | { | |
d521ce57 | 16393 | const char *include_name = |
c6da4cef DE |
16394 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
16395 | if (include_name != NULL) | |
aaa75496 JB |
16396 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
16397 | } | |
16398 | } | |
cb1df416 DJ |
16399 | else |
16400 | { | |
16401 | /* Make sure a symtab is created for every file, even files | |
16402 | which contain only variables (i.e. no code with associated | |
16403 | line numbers). */ | |
cb1df416 | 16404 | int i; |
cb1df416 DJ |
16405 | |
16406 | for (i = 0; i < lh->num_file_names; i++) | |
16407 | { | |
d521ce57 | 16408 | const char *dir = NULL; |
f3f5162e | 16409 | struct file_entry *fe; |
9a619af0 | 16410 | |
cb1df416 DJ |
16411 | fe = &lh->file_names[i]; |
16412 | if (fe->dir_index) | |
16413 | dir = lh->include_dirs[fe->dir_index - 1]; | |
16414 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
16415 | ||
16416 | /* Skip the main file; we don't need it, and it must be | |
16417 | allocated last, so that it will show up before the | |
16418 | non-primary symtabs in the objfile's symtab list. */ | |
16419 | if (current_subfile == first_subfile) | |
16420 | continue; | |
16421 | ||
16422 | if (current_subfile->symtab == NULL) | |
16423 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 16424 | objfile); |
cb1df416 DJ |
16425 | fe->symtab = current_subfile->symtab; |
16426 | } | |
16427 | } | |
c906108c SS |
16428 | } |
16429 | ||
16430 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
16431 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
16432 | or NULL if not known. COMP_DIR is the compilation directory for the |
16433 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
16434 | This routine tries to keep line numbers from identical absolute and |
16435 | relative file names in a common subfile. | |
16436 | ||
16437 | Using the `list' example from the GDB testsuite, which resides in | |
16438 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
16439 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
16440 | ||
c5aa993b JM |
16441 | DW_AT_name: /srcdir/list0.c |
16442 | DW_AT_comp_dir: /compdir | |
357e46e7 | 16443 | files.files[0].name: list0.h |
c5aa993b | 16444 | files.files[0].dir: /srcdir |
357e46e7 | 16445 | files.files[1].name: list0.c |
c5aa993b | 16446 | files.files[1].dir: /srcdir |
c906108c SS |
16447 | |
16448 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
16449 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
16450 | start_subfile will ensure that this happens provided that we pass the | |
16451 | concatenation of files.files[1].dir and files.files[1].name as the | |
16452 | subfile's name. */ | |
c906108c SS |
16453 | |
16454 | static void | |
d521ce57 | 16455 | dwarf2_start_subfile (const char *filename, const char *dirname, |
3e43a32a | 16456 | const char *comp_dir) |
c906108c | 16457 | { |
d521ce57 | 16458 | char *copy = NULL; |
4f1520fb FR |
16459 | |
16460 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
16461 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
16462 | second argument to start_subfile. To be consistent, we do the | |
16463 | same here. In order not to lose the line information directory, | |
16464 | we concatenate it to the filename when it makes sense. | |
16465 | Note that the Dwarf3 standard says (speaking of filenames in line | |
16466 | information): ``The directory index is ignored for file names | |
16467 | that represent full path names''. Thus ignoring dirname in the | |
16468 | `else' branch below isn't an issue. */ | |
c906108c | 16469 | |
d5166ae1 | 16470 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
16471 | { |
16472 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
16473 | filename = copy; | |
16474 | } | |
c906108c | 16475 | |
d521ce57 | 16476 | start_subfile (filename, comp_dir); |
4f1520fb | 16477 | |
d521ce57 TT |
16478 | if (copy != NULL) |
16479 | xfree (copy); | |
c906108c SS |
16480 | } |
16481 | ||
f4dc4d17 DE |
16482 | /* Start a symtab for DWARF. |
16483 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
16484 | ||
16485 | static void | |
16486 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15d034d0 | 16487 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 DE |
16488 | { |
16489 | start_symtab (name, comp_dir, low_pc); | |
16490 | record_debugformat ("DWARF 2"); | |
16491 | record_producer (cu->producer); | |
16492 | ||
16493 | /* We assume that we're processing GCC output. */ | |
16494 | processing_gcc_compilation = 2; | |
16495 | ||
4d4ec4e5 | 16496 | cu->processing_has_namespace_info = 0; |
f4dc4d17 DE |
16497 | } |
16498 | ||
4c2df51b DJ |
16499 | static void |
16500 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 16501 | struct dwarf2_cu *cu) |
4c2df51b | 16502 | { |
e7c27a73 DJ |
16503 | struct objfile *objfile = cu->objfile; |
16504 | struct comp_unit_head *cu_header = &cu->header; | |
16505 | ||
4c2df51b DJ |
16506 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
16507 | code here to turn a symbol with DW_AT_external and a | |
16508 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
16509 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
16510 | with some versions of binutils) where shared libraries could have | |
16511 | relocations against symbols in their debug information - the | |
16512 | minimal symbol would have the right address, but the debug info | |
16513 | would not. It's no longer necessary, because we will explicitly | |
16514 | apply relocations when we read in the debug information now. */ | |
16515 | ||
16516 | /* A DW_AT_location attribute with no contents indicates that a | |
16517 | variable has been optimized away. */ | |
16518 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
16519 | { | |
f1e6e072 | 16520 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
16521 | return; |
16522 | } | |
16523 | ||
16524 | /* Handle one degenerate form of location expression specially, to | |
16525 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
16526 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
16527 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
16528 | |
16529 | if (attr_form_is_block (attr) | |
3019eac3 DE |
16530 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
16531 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
16532 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
16533 | && (DW_BLOCK (attr)->size | |
16534 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 16535 | { |
891d2f0b | 16536 | unsigned int dummy; |
4c2df51b | 16537 | |
3019eac3 DE |
16538 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
16539 | SYMBOL_VALUE_ADDRESS (sym) = | |
16540 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
16541 | else | |
16542 | SYMBOL_VALUE_ADDRESS (sym) = | |
16543 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 16544 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
16545 | fixup_symbol_section (sym, objfile); |
16546 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
16547 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
16548 | return; |
16549 | } | |
16550 | ||
16551 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
16552 | expression evaluator, and use LOC_COMPUTED only when necessary | |
16553 | (i.e. when the value of a register or memory location is | |
16554 | referenced, or a thread-local block, etc.). Then again, it might | |
16555 | not be worthwhile. I'm assuming that it isn't unless performance | |
16556 | or memory numbers show me otherwise. */ | |
16557 | ||
f1e6e072 | 16558 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 16559 | |
f1e6e072 | 16560 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 16561 | cu->has_loclist = 1; |
4c2df51b DJ |
16562 | } |
16563 | ||
c906108c SS |
16564 | /* Given a pointer to a DWARF information entry, figure out if we need |
16565 | to make a symbol table entry for it, and if so, create a new entry | |
16566 | and return a pointer to it. | |
16567 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
16568 | used the passed type. |
16569 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
16570 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
16571 | |
16572 | static struct symbol * | |
34eaf542 TT |
16573 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
16574 | struct symbol *space) | |
c906108c | 16575 | { |
e7c27a73 | 16576 | struct objfile *objfile = cu->objfile; |
c906108c | 16577 | struct symbol *sym = NULL; |
15d034d0 | 16578 | const char *name; |
c906108c SS |
16579 | struct attribute *attr = NULL; |
16580 | struct attribute *attr2 = NULL; | |
e142c38c | 16581 | CORE_ADDR baseaddr; |
e37fd15a SW |
16582 | struct pending **list_to_add = NULL; |
16583 | ||
edb3359d | 16584 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
16585 | |
16586 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 16587 | |
94af9270 | 16588 | name = dwarf2_name (die, cu); |
c906108c SS |
16589 | if (name) |
16590 | { | |
94af9270 | 16591 | const char *linkagename; |
34eaf542 | 16592 | int suppress_add = 0; |
94af9270 | 16593 | |
34eaf542 TT |
16594 | if (space) |
16595 | sym = space; | |
16596 | else | |
e623cf5d | 16597 | sym = allocate_symbol (objfile); |
c906108c | 16598 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
16599 | |
16600 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 16601 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
16602 | linkagename = dwarf2_physname (name, die, cu); |
16603 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 16604 | |
f55ee35c JK |
16605 | /* Fortran does not have mangling standard and the mangling does differ |
16606 | between gfortran, iFort etc. */ | |
16607 | if (cu->language == language_fortran | |
b250c185 | 16608 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 16609 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 16610 | dwarf2_full_name (name, die, cu), |
29df156d | 16611 | NULL); |
f55ee35c | 16612 | |
c906108c | 16613 | /* Default assumptions. |
c5aa993b | 16614 | Use the passed type or decode it from the die. */ |
176620f1 | 16615 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 16616 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
16617 | if (type != NULL) |
16618 | SYMBOL_TYPE (sym) = type; | |
16619 | else | |
e7c27a73 | 16620 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
16621 | attr = dwarf2_attr (die, |
16622 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
16623 | cu); | |
c906108c SS |
16624 | if (attr) |
16625 | { | |
16626 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
16627 | } | |
cb1df416 | 16628 | |
edb3359d DJ |
16629 | attr = dwarf2_attr (die, |
16630 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
16631 | cu); | |
cb1df416 DJ |
16632 | if (attr) |
16633 | { | |
16634 | int file_index = DW_UNSND (attr); | |
9a619af0 | 16635 | |
cb1df416 DJ |
16636 | if (cu->line_header == NULL |
16637 | || file_index > cu->line_header->num_file_names) | |
16638 | complaint (&symfile_complaints, | |
16639 | _("file index out of range")); | |
1c3d648d | 16640 | else if (file_index > 0) |
cb1df416 DJ |
16641 | { |
16642 | struct file_entry *fe; | |
9a619af0 | 16643 | |
cb1df416 DJ |
16644 | fe = &cu->line_header->file_names[file_index - 1]; |
16645 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
16646 | } | |
16647 | } | |
16648 | ||
c906108c SS |
16649 | switch (die->tag) |
16650 | { | |
16651 | case DW_TAG_label: | |
e142c38c | 16652 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c SS |
16653 | if (attr) |
16654 | { | |
16655 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; | |
16656 | } | |
0f5238ed TT |
16657 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
16658 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 16659 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 16660 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
16661 | break; |
16662 | case DW_TAG_subprogram: | |
16663 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
16664 | finish_block. */ | |
f1e6e072 | 16665 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 16666 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
16667 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
16668 | || cu->language == language_ada) | |
c906108c | 16669 | { |
2cfa0c8d JB |
16670 | /* Subprograms marked external are stored as a global symbol. |
16671 | Ada subprograms, whether marked external or not, are always | |
16672 | stored as a global symbol, because we want to be able to | |
16673 | access them globally. For instance, we want to be able | |
16674 | to break on a nested subprogram without having to | |
16675 | specify the context. */ | |
e37fd15a | 16676 | list_to_add = &global_symbols; |
c906108c SS |
16677 | } |
16678 | else | |
16679 | { | |
e37fd15a | 16680 | list_to_add = cu->list_in_scope; |
c906108c SS |
16681 | } |
16682 | break; | |
edb3359d DJ |
16683 | case DW_TAG_inlined_subroutine: |
16684 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
16685 | finish_block. */ | |
f1e6e072 | 16686 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 16687 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 16688 | list_to_add = cu->list_in_scope; |
edb3359d | 16689 | break; |
34eaf542 TT |
16690 | case DW_TAG_template_value_param: |
16691 | suppress_add = 1; | |
16692 | /* Fall through. */ | |
72929c62 | 16693 | case DW_TAG_constant: |
c906108c | 16694 | case DW_TAG_variable: |
254e6b9e | 16695 | case DW_TAG_member: |
0963b4bd MS |
16696 | /* Compilation with minimal debug info may result in |
16697 | variables with missing type entries. Change the | |
16698 | misleading `void' type to something sensible. */ | |
c906108c | 16699 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 16700 | SYMBOL_TYPE (sym) |
46bf5051 | 16701 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 16702 | |
e142c38c | 16703 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
16704 | /* In the case of DW_TAG_member, we should only be called for |
16705 | static const members. */ | |
16706 | if (die->tag == DW_TAG_member) | |
16707 | { | |
3863f96c DE |
16708 | /* dwarf2_add_field uses die_is_declaration, |
16709 | so we do the same. */ | |
254e6b9e DE |
16710 | gdb_assert (die_is_declaration (die, cu)); |
16711 | gdb_assert (attr); | |
16712 | } | |
c906108c SS |
16713 | if (attr) |
16714 | { | |
e7c27a73 | 16715 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 16716 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 16717 | if (!suppress_add) |
34eaf542 TT |
16718 | { |
16719 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 16720 | list_to_add = &global_symbols; |
34eaf542 | 16721 | else |
e37fd15a | 16722 | list_to_add = cu->list_in_scope; |
34eaf542 | 16723 | } |
c906108c SS |
16724 | break; |
16725 | } | |
e142c38c | 16726 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
16727 | if (attr) |
16728 | { | |
e7c27a73 | 16729 | var_decode_location (attr, sym, cu); |
e142c38c | 16730 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
16731 | |
16732 | /* Fortran explicitly imports any global symbols to the local | |
16733 | scope by DW_TAG_common_block. */ | |
16734 | if (cu->language == language_fortran && die->parent | |
16735 | && die->parent->tag == DW_TAG_common_block) | |
16736 | attr2 = NULL; | |
16737 | ||
caac4577 JG |
16738 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
16739 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
16740 | && !dwarf2_per_objfile->has_section_at_zero) | |
16741 | { | |
16742 | /* When a static variable is eliminated by the linker, | |
16743 | the corresponding debug information is not stripped | |
16744 | out, but the variable address is set to null; | |
16745 | do not add such variables into symbol table. */ | |
16746 | } | |
16747 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 16748 | { |
f55ee35c JK |
16749 | /* Workaround gfortran PR debug/40040 - it uses |
16750 | DW_AT_location for variables in -fPIC libraries which may | |
16751 | get overriden by other libraries/executable and get | |
16752 | a different address. Resolve it by the minimal symbol | |
16753 | which may come from inferior's executable using copy | |
16754 | relocation. Make this workaround only for gfortran as for | |
16755 | other compilers GDB cannot guess the minimal symbol | |
16756 | Fortran mangling kind. */ | |
16757 | if (cu->language == language_fortran && die->parent | |
16758 | && die->parent->tag == DW_TAG_module | |
16759 | && cu->producer | |
16760 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
f1e6e072 | 16761 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 16762 | |
1c809c68 TT |
16763 | /* A variable with DW_AT_external is never static, |
16764 | but it may be block-scoped. */ | |
16765 | list_to_add = (cu->list_in_scope == &file_symbols | |
16766 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 16767 | } |
c906108c | 16768 | else |
e37fd15a | 16769 | list_to_add = cu->list_in_scope; |
c906108c SS |
16770 | } |
16771 | else | |
16772 | { | |
16773 | /* We do not know the address of this symbol. | |
c5aa993b JM |
16774 | If it is an external symbol and we have type information |
16775 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
16776 | The address of the variable will then be determined from | |
16777 | the minimal symbol table whenever the variable is | |
16778 | referenced. */ | |
e142c38c | 16779 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
16780 | |
16781 | /* Fortran explicitly imports any global symbols to the local | |
16782 | scope by DW_TAG_common_block. */ | |
16783 | if (cu->language == language_fortran && die->parent | |
16784 | && die->parent->tag == DW_TAG_common_block) | |
16785 | { | |
16786 | /* SYMBOL_CLASS doesn't matter here because | |
16787 | read_common_block is going to reset it. */ | |
16788 | if (!suppress_add) | |
16789 | list_to_add = cu->list_in_scope; | |
16790 | } | |
16791 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
16792 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 16793 | { |
0fe7935b DJ |
16794 | /* A variable with DW_AT_external is never static, but it |
16795 | may be block-scoped. */ | |
16796 | list_to_add = (cu->list_in_scope == &file_symbols | |
16797 | ? &global_symbols : cu->list_in_scope); | |
16798 | ||
f1e6e072 | 16799 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 16800 | } |
442ddf59 JK |
16801 | else if (!die_is_declaration (die, cu)) |
16802 | { | |
16803 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
16804 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
16805 | if (!suppress_add) |
16806 | list_to_add = cu->list_in_scope; | |
442ddf59 | 16807 | } |
c906108c SS |
16808 | } |
16809 | break; | |
16810 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
16811 | /* If we are inside a function, mark this as an argument. If |
16812 | not, we might be looking at an argument to an inlined function | |
16813 | when we do not have enough information to show inlined frames; | |
16814 | pretend it's a local variable in that case so that the user can | |
16815 | still see it. */ | |
16816 | if (context_stack_depth > 0 | |
16817 | && context_stack[context_stack_depth - 1].name != NULL) | |
16818 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 16819 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
16820 | if (attr) |
16821 | { | |
e7c27a73 | 16822 | var_decode_location (attr, sym, cu); |
c906108c | 16823 | } |
e142c38c | 16824 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
16825 | if (attr) |
16826 | { | |
e7c27a73 | 16827 | dwarf2_const_value (attr, sym, cu); |
c906108c | 16828 | } |
f346a30d | 16829 | |
e37fd15a | 16830 | list_to_add = cu->list_in_scope; |
c906108c SS |
16831 | break; |
16832 | case DW_TAG_unspecified_parameters: | |
16833 | /* From varargs functions; gdb doesn't seem to have any | |
16834 | interest in this information, so just ignore it for now. | |
16835 | (FIXME?) */ | |
16836 | break; | |
34eaf542 TT |
16837 | case DW_TAG_template_type_param: |
16838 | suppress_add = 1; | |
16839 | /* Fall through. */ | |
c906108c | 16840 | case DW_TAG_class_type: |
680b30c7 | 16841 | case DW_TAG_interface_type: |
c906108c SS |
16842 | case DW_TAG_structure_type: |
16843 | case DW_TAG_union_type: | |
72019c9c | 16844 | case DW_TAG_set_type: |
c906108c | 16845 | case DW_TAG_enumeration_type: |
f1e6e072 | 16846 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 16847 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 16848 | |
63d06c5c | 16849 | { |
987504bb | 16850 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
16851 | really ever be static objects: otherwise, if you try |
16852 | to, say, break of a class's method and you're in a file | |
16853 | which doesn't mention that class, it won't work unless | |
16854 | the check for all static symbols in lookup_symbol_aux | |
16855 | saves you. See the OtherFileClass tests in | |
16856 | gdb.c++/namespace.exp. */ | |
16857 | ||
e37fd15a | 16858 | if (!suppress_add) |
34eaf542 | 16859 | { |
34eaf542 TT |
16860 | list_to_add = (cu->list_in_scope == &file_symbols |
16861 | && (cu->language == language_cplus | |
16862 | || cu->language == language_java) | |
16863 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 16864 | |
64382290 TT |
16865 | /* The semantics of C++ state that "struct foo { |
16866 | ... }" also defines a typedef for "foo". A Java | |
16867 | class declaration also defines a typedef for the | |
16868 | class. */ | |
16869 | if (cu->language == language_cplus | |
16870 | || cu->language == language_java | |
16871 | || cu->language == language_ada) | |
16872 | { | |
16873 | /* The symbol's name is already allocated along | |
16874 | with this objfile, so we don't need to | |
16875 | duplicate it for the type. */ | |
16876 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
16877 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
16878 | } | |
63d06c5c DC |
16879 | } |
16880 | } | |
c906108c SS |
16881 | break; |
16882 | case DW_TAG_typedef: | |
f1e6e072 | 16883 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 16884 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 16885 | list_to_add = cu->list_in_scope; |
63d06c5c | 16886 | break; |
c906108c | 16887 | case DW_TAG_base_type: |
a02abb62 | 16888 | case DW_TAG_subrange_type: |
f1e6e072 | 16889 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 16890 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 16891 | list_to_add = cu->list_in_scope; |
c906108c SS |
16892 | break; |
16893 | case DW_TAG_enumerator: | |
e142c38c | 16894 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
16895 | if (attr) |
16896 | { | |
e7c27a73 | 16897 | dwarf2_const_value (attr, sym, cu); |
c906108c | 16898 | } |
63d06c5c DC |
16899 | { |
16900 | /* NOTE: carlton/2003-11-10: See comment above in the | |
16901 | DW_TAG_class_type, etc. block. */ | |
16902 | ||
e142c38c | 16903 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
16904 | && (cu->language == language_cplus |
16905 | || cu->language == language_java) | |
e142c38c | 16906 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 16907 | } |
c906108c | 16908 | break; |
5c4e30ca | 16909 | case DW_TAG_namespace: |
f1e6e072 | 16910 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 16911 | list_to_add = &global_symbols; |
5c4e30ca | 16912 | break; |
4357ac6c | 16913 | case DW_TAG_common_block: |
f1e6e072 | 16914 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
16915 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
16916 | add_symbol_to_list (sym, cu->list_in_scope); | |
16917 | break; | |
c906108c SS |
16918 | default: |
16919 | /* Not a tag we recognize. Hopefully we aren't processing | |
16920 | trash data, but since we must specifically ignore things | |
16921 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 16922 | this point. */ |
e2e0b3e5 | 16923 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 16924 | dwarf_tag_name (die->tag)); |
c906108c SS |
16925 | break; |
16926 | } | |
df8a16a1 | 16927 | |
e37fd15a SW |
16928 | if (suppress_add) |
16929 | { | |
16930 | sym->hash_next = objfile->template_symbols; | |
16931 | objfile->template_symbols = sym; | |
16932 | list_to_add = NULL; | |
16933 | } | |
16934 | ||
16935 | if (list_to_add != NULL) | |
16936 | add_symbol_to_list (sym, list_to_add); | |
16937 | ||
df8a16a1 DJ |
16938 | /* For the benefit of old versions of GCC, check for anonymous |
16939 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 16940 | if (!cu->processing_has_namespace_info |
94af9270 | 16941 | && cu->language == language_cplus) |
a10964d1 | 16942 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
16943 | } |
16944 | return (sym); | |
16945 | } | |
16946 | ||
34eaf542 TT |
16947 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
16948 | ||
16949 | static struct symbol * | |
16950 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
16951 | { | |
16952 | return new_symbol_full (die, type, cu, NULL); | |
16953 | } | |
16954 | ||
98bfdba5 PA |
16955 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
16956 | zero-extend it as appropriate for the symbol's type. The DWARF | |
16957 | standard (v4) is not entirely clear about the meaning of using | |
16958 | DW_FORM_dataN for a constant with a signed type, where the type is | |
16959 | wider than the data. The conclusion of a discussion on the DWARF | |
16960 | list was that this is unspecified. We choose to always zero-extend | |
16961 | because that is the interpretation long in use by GCC. */ | |
c906108c | 16962 | |
98bfdba5 | 16963 | static gdb_byte * |
ff39bb5e | 16964 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 16965 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 16966 | { |
e7c27a73 | 16967 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
16968 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
16969 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
16970 | LONGEST l = DW_UNSND (attr); |
16971 | ||
16972 | if (bits < sizeof (*value) * 8) | |
16973 | { | |
16974 | l &= ((LONGEST) 1 << bits) - 1; | |
16975 | *value = l; | |
16976 | } | |
16977 | else if (bits == sizeof (*value) * 8) | |
16978 | *value = l; | |
16979 | else | |
16980 | { | |
16981 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
16982 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
16983 | return bytes; | |
16984 | } | |
16985 | ||
16986 | return NULL; | |
16987 | } | |
16988 | ||
16989 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
16990 | the value does not fit in *VALUE, set *BYTES - either already | |
16991 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
16992 | or, set *BATON, if we translated the constant to a location | |
16993 | expression. */ | |
16994 | ||
16995 | static void | |
ff39bb5e | 16996 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
16997 | const char *name, struct obstack *obstack, |
16998 | struct dwarf2_cu *cu, | |
d521ce57 | 16999 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
17000 | struct dwarf2_locexpr_baton **baton) |
17001 | { | |
17002 | struct objfile *objfile = cu->objfile; | |
17003 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 17004 | struct dwarf_block *blk; |
98bfdba5 PA |
17005 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
17006 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
17007 | ||
17008 | *value = 0; | |
17009 | *bytes = NULL; | |
17010 | *baton = NULL; | |
c906108c SS |
17011 | |
17012 | switch (attr->form) | |
17013 | { | |
17014 | case DW_FORM_addr: | |
3019eac3 | 17015 | case DW_FORM_GNU_addr_index: |
ac56253d | 17016 | { |
ac56253d TT |
17017 | gdb_byte *data; |
17018 | ||
98bfdba5 PA |
17019 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
17020 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 17021 | cu_header->addr_size, |
98bfdba5 | 17022 | TYPE_LENGTH (type)); |
ac56253d TT |
17023 | /* Symbols of this form are reasonably rare, so we just |
17024 | piggyback on the existing location code rather than writing | |
17025 | a new implementation of symbol_computed_ops. */ | |
7919a973 | 17026 | *baton = obstack_alloc (obstack, sizeof (struct dwarf2_locexpr_baton)); |
98bfdba5 PA |
17027 | (*baton)->per_cu = cu->per_cu; |
17028 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 17029 | |
98bfdba5 | 17030 | (*baton)->size = 2 + cu_header->addr_size; |
7919a973 | 17031 | data = obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 17032 | (*baton)->data = data; |
ac56253d TT |
17033 | |
17034 | data[0] = DW_OP_addr; | |
17035 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
17036 | byte_order, DW_ADDR (attr)); | |
17037 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 17038 | } |
c906108c | 17039 | break; |
4ac36638 | 17040 | case DW_FORM_string: |
93b5768b | 17041 | case DW_FORM_strp: |
3019eac3 | 17042 | case DW_FORM_GNU_str_index: |
36586728 | 17043 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
17044 | /* DW_STRING is already allocated on the objfile obstack, point |
17045 | directly to it. */ | |
d521ce57 | 17046 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 17047 | break; |
c906108c SS |
17048 | case DW_FORM_block1: |
17049 | case DW_FORM_block2: | |
17050 | case DW_FORM_block4: | |
17051 | case DW_FORM_block: | |
2dc7f7b3 | 17052 | case DW_FORM_exprloc: |
c906108c | 17053 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
17054 | if (TYPE_LENGTH (type) != blk->size) |
17055 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
17056 | TYPE_LENGTH (type)); | |
17057 | *bytes = blk->data; | |
c906108c | 17058 | break; |
2df3850c JM |
17059 | |
17060 | /* The DW_AT_const_value attributes are supposed to carry the | |
17061 | symbol's value "represented as it would be on the target | |
17062 | architecture." By the time we get here, it's already been | |
17063 | converted to host endianness, so we just need to sign- or | |
17064 | zero-extend it as appropriate. */ | |
17065 | case DW_FORM_data1: | |
3aef2284 | 17066 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 17067 | break; |
c906108c | 17068 | case DW_FORM_data2: |
3aef2284 | 17069 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 17070 | break; |
c906108c | 17071 | case DW_FORM_data4: |
3aef2284 | 17072 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 17073 | break; |
c906108c | 17074 | case DW_FORM_data8: |
3aef2284 | 17075 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
17076 | break; |
17077 | ||
c906108c | 17078 | case DW_FORM_sdata: |
98bfdba5 | 17079 | *value = DW_SND (attr); |
2df3850c JM |
17080 | break; |
17081 | ||
c906108c | 17082 | case DW_FORM_udata: |
98bfdba5 | 17083 | *value = DW_UNSND (attr); |
c906108c | 17084 | break; |
2df3850c | 17085 | |
c906108c | 17086 | default: |
4d3c2250 | 17087 | complaint (&symfile_complaints, |
e2e0b3e5 | 17088 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 17089 | dwarf_form_name (attr->form)); |
98bfdba5 | 17090 | *value = 0; |
c906108c SS |
17091 | break; |
17092 | } | |
17093 | } | |
17094 | ||
2df3850c | 17095 | |
98bfdba5 PA |
17096 | /* Copy constant value from an attribute to a symbol. */ |
17097 | ||
2df3850c | 17098 | static void |
ff39bb5e | 17099 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 17100 | struct dwarf2_cu *cu) |
2df3850c | 17101 | { |
98bfdba5 PA |
17102 | struct objfile *objfile = cu->objfile; |
17103 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 17104 | LONGEST value; |
d521ce57 | 17105 | const gdb_byte *bytes; |
98bfdba5 | 17106 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 17107 | |
98bfdba5 PA |
17108 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
17109 | SYMBOL_PRINT_NAME (sym), | |
17110 | &objfile->objfile_obstack, cu, | |
17111 | &value, &bytes, &baton); | |
2df3850c | 17112 | |
98bfdba5 PA |
17113 | if (baton != NULL) |
17114 | { | |
98bfdba5 | 17115 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 17116 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
17117 | } |
17118 | else if (bytes != NULL) | |
17119 | { | |
17120 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 17121 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
17122 | } |
17123 | else | |
17124 | { | |
17125 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 17126 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 17127 | } |
2df3850c JM |
17128 | } |
17129 | ||
c906108c SS |
17130 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
17131 | ||
17132 | static struct type * | |
e7c27a73 | 17133 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17134 | { |
c906108c | 17135 | struct attribute *type_attr; |
c906108c | 17136 | |
e142c38c | 17137 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
17138 | if (!type_attr) |
17139 | { | |
17140 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 17141 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 17142 | } |
348e048f | 17143 | |
673bfd45 | 17144 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
17145 | } |
17146 | ||
b4ba55a1 JB |
17147 | /* True iff CU's producer generates GNAT Ada auxiliary information |
17148 | that allows to find parallel types through that information instead | |
17149 | of having to do expensive parallel lookups by type name. */ | |
17150 | ||
17151 | static int | |
17152 | need_gnat_info (struct dwarf2_cu *cu) | |
17153 | { | |
17154 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
17155 | of GNAT produces this auxiliary information, without any indication | |
17156 | that it is produced. Part of enhancing the FSF version of GNAT | |
17157 | to produce that information will be to put in place an indicator | |
17158 | that we can use in order to determine whether the descriptive type | |
17159 | info is available or not. One suggestion that has been made is | |
17160 | to use a new attribute, attached to the CU die. For now, assume | |
17161 | that the descriptive type info is not available. */ | |
17162 | return 0; | |
17163 | } | |
17164 | ||
b4ba55a1 JB |
17165 | /* Return the auxiliary type of the die in question using its |
17166 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
17167 | attribute is not present. */ | |
17168 | ||
17169 | static struct type * | |
17170 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
17171 | { | |
b4ba55a1 | 17172 | struct attribute *type_attr; |
b4ba55a1 JB |
17173 | |
17174 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
17175 | if (!type_attr) | |
17176 | return NULL; | |
17177 | ||
673bfd45 | 17178 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
17179 | } |
17180 | ||
17181 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
17182 | descriptive type accordingly. */ | |
17183 | ||
17184 | static void | |
17185 | set_descriptive_type (struct type *type, struct die_info *die, | |
17186 | struct dwarf2_cu *cu) | |
17187 | { | |
17188 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
17189 | ||
17190 | if (descriptive_type) | |
17191 | { | |
17192 | ALLOCATE_GNAT_AUX_TYPE (type); | |
17193 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
17194 | } | |
17195 | } | |
17196 | ||
c906108c SS |
17197 | /* Return the containing type of the die in question using its |
17198 | DW_AT_containing_type attribute. */ | |
17199 | ||
17200 | static struct type * | |
e7c27a73 | 17201 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17202 | { |
c906108c | 17203 | struct attribute *type_attr; |
c906108c | 17204 | |
e142c38c | 17205 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
17206 | if (!type_attr) |
17207 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
4262abfb | 17208 | "[in module %s]"), objfile_name (cu->objfile)); |
33ac96f0 | 17209 | |
673bfd45 | 17210 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
17211 | } |
17212 | ||
ac9ec31b DE |
17213 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
17214 | ||
17215 | static struct type * | |
17216 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
17217 | { | |
17218 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17219 | char *message, *saved; | |
17220 | ||
17221 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
4262abfb | 17222 | objfile_name (objfile), |
ac9ec31b DE |
17223 | cu->header.offset.sect_off, |
17224 | die->offset.sect_off); | |
17225 | saved = obstack_copy0 (&objfile->objfile_obstack, | |
17226 | message, strlen (message)); | |
17227 | xfree (message); | |
17228 | ||
17229 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
17230 | } | |
17231 | ||
673bfd45 | 17232 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
17233 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
17234 | DW_AT_containing_type. | |
673bfd45 DE |
17235 | If there is no type substitute an error marker. */ |
17236 | ||
c906108c | 17237 | static struct type * |
ff39bb5e | 17238 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 17239 | struct dwarf2_cu *cu) |
c906108c | 17240 | { |
bb5ed363 | 17241 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
17242 | struct type *this_type; |
17243 | ||
ac9ec31b DE |
17244 | gdb_assert (attr->name == DW_AT_type |
17245 | || attr->name == DW_AT_GNAT_descriptive_type | |
17246 | || attr->name == DW_AT_containing_type); | |
17247 | ||
673bfd45 DE |
17248 | /* First see if we have it cached. */ |
17249 | ||
36586728 TT |
17250 | if (attr->form == DW_FORM_GNU_ref_alt) |
17251 | { | |
17252 | struct dwarf2_per_cu_data *per_cu; | |
17253 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
17254 | ||
17255 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
17256 | this_type = get_die_type_at_offset (offset, per_cu); | |
17257 | } | |
7771576e | 17258 | else if (attr_form_is_ref (attr)) |
673bfd45 | 17259 | { |
b64f50a1 | 17260 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
17261 | |
17262 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
17263 | } | |
55f1336d | 17264 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 17265 | { |
ac9ec31b | 17266 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 17267 | |
ac9ec31b | 17268 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
17269 | } |
17270 | else | |
17271 | { | |
ac9ec31b DE |
17272 | complaint (&symfile_complaints, |
17273 | _("Dwarf Error: Bad type attribute %s in DIE" | |
17274 | " at 0x%x [in module %s]"), | |
17275 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
4262abfb | 17276 | objfile_name (objfile)); |
ac9ec31b | 17277 | return build_error_marker_type (cu, die); |
673bfd45 DE |
17278 | } |
17279 | ||
17280 | /* If not cached we need to read it in. */ | |
17281 | ||
17282 | if (this_type == NULL) | |
17283 | { | |
ac9ec31b | 17284 | struct die_info *type_die = NULL; |
673bfd45 DE |
17285 | struct dwarf2_cu *type_cu = cu; |
17286 | ||
7771576e | 17287 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
17288 | type_die = follow_die_ref (die, attr, &type_cu); |
17289 | if (type_die == NULL) | |
17290 | return build_error_marker_type (cu, die); | |
17291 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
17292 | from an inter-CU reference and the type's CU got expanded before |
17293 | ours. */ | |
ac9ec31b | 17294 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
17295 | } |
17296 | ||
17297 | /* If we still don't have a type use an error marker. */ | |
17298 | ||
17299 | if (this_type == NULL) | |
ac9ec31b | 17300 | return build_error_marker_type (cu, die); |
673bfd45 | 17301 | |
f792889a | 17302 | return this_type; |
c906108c SS |
17303 | } |
17304 | ||
673bfd45 DE |
17305 | /* Return the type in DIE, CU. |
17306 | Returns NULL for invalid types. | |
17307 | ||
02142a6c | 17308 | This first does a lookup in die_type_hash, |
673bfd45 DE |
17309 | and only reads the die in if necessary. |
17310 | ||
17311 | NOTE: This can be called when reading in partial or full symbols. */ | |
17312 | ||
f792889a | 17313 | static struct type * |
e7c27a73 | 17314 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17315 | { |
f792889a DJ |
17316 | struct type *this_type; |
17317 | ||
17318 | this_type = get_die_type (die, cu); | |
17319 | if (this_type) | |
17320 | return this_type; | |
17321 | ||
673bfd45 DE |
17322 | return read_type_die_1 (die, cu); |
17323 | } | |
17324 | ||
17325 | /* Read the type in DIE, CU. | |
17326 | Returns NULL for invalid types. */ | |
17327 | ||
17328 | static struct type * | |
17329 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
17330 | { | |
17331 | struct type *this_type = NULL; | |
17332 | ||
c906108c SS |
17333 | switch (die->tag) |
17334 | { | |
17335 | case DW_TAG_class_type: | |
680b30c7 | 17336 | case DW_TAG_interface_type: |
c906108c SS |
17337 | case DW_TAG_structure_type: |
17338 | case DW_TAG_union_type: | |
f792889a | 17339 | this_type = read_structure_type (die, cu); |
c906108c SS |
17340 | break; |
17341 | case DW_TAG_enumeration_type: | |
f792889a | 17342 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
17343 | break; |
17344 | case DW_TAG_subprogram: | |
17345 | case DW_TAG_subroutine_type: | |
edb3359d | 17346 | case DW_TAG_inlined_subroutine: |
f792889a | 17347 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
17348 | break; |
17349 | case DW_TAG_array_type: | |
f792889a | 17350 | this_type = read_array_type (die, cu); |
c906108c | 17351 | break; |
72019c9c | 17352 | case DW_TAG_set_type: |
f792889a | 17353 | this_type = read_set_type (die, cu); |
72019c9c | 17354 | break; |
c906108c | 17355 | case DW_TAG_pointer_type: |
f792889a | 17356 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
17357 | break; |
17358 | case DW_TAG_ptr_to_member_type: | |
f792889a | 17359 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
17360 | break; |
17361 | case DW_TAG_reference_type: | |
f792889a | 17362 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
17363 | break; |
17364 | case DW_TAG_const_type: | |
f792889a | 17365 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
17366 | break; |
17367 | case DW_TAG_volatile_type: | |
f792889a | 17368 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 17369 | break; |
06d66ee9 TT |
17370 | case DW_TAG_restrict_type: |
17371 | this_type = read_tag_restrict_type (die, cu); | |
17372 | break; | |
c906108c | 17373 | case DW_TAG_string_type: |
f792889a | 17374 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
17375 | break; |
17376 | case DW_TAG_typedef: | |
f792889a | 17377 | this_type = read_typedef (die, cu); |
c906108c | 17378 | break; |
a02abb62 | 17379 | case DW_TAG_subrange_type: |
f792889a | 17380 | this_type = read_subrange_type (die, cu); |
a02abb62 | 17381 | break; |
c906108c | 17382 | case DW_TAG_base_type: |
f792889a | 17383 | this_type = read_base_type (die, cu); |
c906108c | 17384 | break; |
81a17f79 | 17385 | case DW_TAG_unspecified_type: |
f792889a | 17386 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 17387 | break; |
0114d602 DJ |
17388 | case DW_TAG_namespace: |
17389 | this_type = read_namespace_type (die, cu); | |
17390 | break; | |
f55ee35c JK |
17391 | case DW_TAG_module: |
17392 | this_type = read_module_type (die, cu); | |
17393 | break; | |
c906108c | 17394 | default: |
3e43a32a MS |
17395 | complaint (&symfile_complaints, |
17396 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 17397 | dwarf_tag_name (die->tag)); |
c906108c SS |
17398 | break; |
17399 | } | |
63d06c5c | 17400 | |
f792889a | 17401 | return this_type; |
63d06c5c DC |
17402 | } |
17403 | ||
abc72ce4 DE |
17404 | /* See if we can figure out if the class lives in a namespace. We do |
17405 | this by looking for a member function; its demangled name will | |
17406 | contain namespace info, if there is any. | |
17407 | Return the computed name or NULL. | |
17408 | Space for the result is allocated on the objfile's obstack. | |
17409 | This is the full-die version of guess_partial_die_structure_name. | |
17410 | In this case we know DIE has no useful parent. */ | |
17411 | ||
17412 | static char * | |
17413 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
17414 | { | |
17415 | struct die_info *spec_die; | |
17416 | struct dwarf2_cu *spec_cu; | |
17417 | struct die_info *child; | |
17418 | ||
17419 | spec_cu = cu; | |
17420 | spec_die = die_specification (die, &spec_cu); | |
17421 | if (spec_die != NULL) | |
17422 | { | |
17423 | die = spec_die; | |
17424 | cu = spec_cu; | |
17425 | } | |
17426 | ||
17427 | for (child = die->child; | |
17428 | child != NULL; | |
17429 | child = child->sibling) | |
17430 | { | |
17431 | if (child->tag == DW_TAG_subprogram) | |
17432 | { | |
17433 | struct attribute *attr; | |
17434 | ||
17435 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
17436 | if (attr == NULL) | |
17437 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
17438 | if (attr != NULL) | |
17439 | { | |
17440 | char *actual_name | |
17441 | = language_class_name_from_physname (cu->language_defn, | |
17442 | DW_STRING (attr)); | |
17443 | char *name = NULL; | |
17444 | ||
17445 | if (actual_name != NULL) | |
17446 | { | |
15d034d0 | 17447 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
17448 | |
17449 | if (die_name != NULL | |
17450 | && strcmp (die_name, actual_name) != 0) | |
17451 | { | |
17452 | /* Strip off the class name from the full name. | |
17453 | We want the prefix. */ | |
17454 | int die_name_len = strlen (die_name); | |
17455 | int actual_name_len = strlen (actual_name); | |
17456 | ||
17457 | /* Test for '::' as a sanity check. */ | |
17458 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
17459 | && actual_name[actual_name_len |
17460 | - die_name_len - 1] == ':') | |
abc72ce4 | 17461 | name = |
10f0c4bb TT |
17462 | obstack_copy0 (&cu->objfile->objfile_obstack, |
17463 | actual_name, | |
17464 | actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
17465 | } |
17466 | } | |
17467 | xfree (actual_name); | |
17468 | return name; | |
17469 | } | |
17470 | } | |
17471 | } | |
17472 | ||
17473 | return NULL; | |
17474 | } | |
17475 | ||
96408a79 SA |
17476 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
17477 | prefix part in such case. See | |
17478 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17479 | ||
17480 | static char * | |
17481 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
17482 | { | |
17483 | struct attribute *attr; | |
17484 | char *base; | |
17485 | ||
17486 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
17487 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
17488 | return NULL; | |
17489 | ||
17490 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
17491 | if (attr != NULL && DW_STRING (attr) != NULL) | |
17492 | return NULL; | |
17493 | ||
17494 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
17495 | if (attr == NULL) | |
17496 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
17497 | if (attr == NULL || DW_STRING (attr) == NULL) | |
17498 | return NULL; | |
17499 | ||
17500 | /* dwarf2_name had to be already called. */ | |
17501 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
17502 | ||
17503 | /* Strip the base name, keep any leading namespaces/classes. */ | |
17504 | base = strrchr (DW_STRING (attr), ':'); | |
17505 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
17506 | return ""; | |
17507 | ||
10f0c4bb TT |
17508 | return obstack_copy0 (&cu->objfile->objfile_obstack, |
17509 | DW_STRING (attr), &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
17510 | } |
17511 | ||
fdde2d81 | 17512 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 17513 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 17514 | |
0114d602 DJ |
17515 | For example, if we're within the method foo() in the following |
17516 | code: | |
17517 | ||
17518 | namespace N { | |
17519 | class C { | |
17520 | void foo () { | |
17521 | } | |
17522 | }; | |
17523 | } | |
17524 | ||
17525 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 17526 | |
0d5cff50 | 17527 | static const char * |
e142c38c | 17528 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 17529 | { |
0114d602 DJ |
17530 | struct die_info *parent, *spec_die; |
17531 | struct dwarf2_cu *spec_cu; | |
17532 | struct type *parent_type; | |
96408a79 | 17533 | char *retval; |
63d06c5c | 17534 | |
f55ee35c JK |
17535 | if (cu->language != language_cplus && cu->language != language_java |
17536 | && cu->language != language_fortran) | |
0114d602 DJ |
17537 | return ""; |
17538 | ||
96408a79 SA |
17539 | retval = anonymous_struct_prefix (die, cu); |
17540 | if (retval) | |
17541 | return retval; | |
17542 | ||
0114d602 DJ |
17543 | /* We have to be careful in the presence of DW_AT_specification. |
17544 | For example, with GCC 3.4, given the code | |
17545 | ||
17546 | namespace N { | |
17547 | void foo() { | |
17548 | // Definition of N::foo. | |
17549 | } | |
17550 | } | |
17551 | ||
17552 | then we'll have a tree of DIEs like this: | |
17553 | ||
17554 | 1: DW_TAG_compile_unit | |
17555 | 2: DW_TAG_namespace // N | |
17556 | 3: DW_TAG_subprogram // declaration of N::foo | |
17557 | 4: DW_TAG_subprogram // definition of N::foo | |
17558 | DW_AT_specification // refers to die #3 | |
17559 | ||
17560 | Thus, when processing die #4, we have to pretend that we're in | |
17561 | the context of its DW_AT_specification, namely the contex of die | |
17562 | #3. */ | |
17563 | spec_cu = cu; | |
17564 | spec_die = die_specification (die, &spec_cu); | |
17565 | if (spec_die == NULL) | |
17566 | parent = die->parent; | |
17567 | else | |
63d06c5c | 17568 | { |
0114d602 DJ |
17569 | parent = spec_die->parent; |
17570 | cu = spec_cu; | |
63d06c5c | 17571 | } |
0114d602 DJ |
17572 | |
17573 | if (parent == NULL) | |
17574 | return ""; | |
98bfdba5 PA |
17575 | else if (parent->building_fullname) |
17576 | { | |
17577 | const char *name; | |
17578 | const char *parent_name; | |
17579 | ||
17580 | /* It has been seen on RealView 2.2 built binaries, | |
17581 | DW_TAG_template_type_param types actually _defined_ as | |
17582 | children of the parent class: | |
17583 | ||
17584 | enum E {}; | |
17585 | template class <class Enum> Class{}; | |
17586 | Class<enum E> class_e; | |
17587 | ||
17588 | 1: DW_TAG_class_type (Class) | |
17589 | 2: DW_TAG_enumeration_type (E) | |
17590 | 3: DW_TAG_enumerator (enum1:0) | |
17591 | 3: DW_TAG_enumerator (enum2:1) | |
17592 | ... | |
17593 | 2: DW_TAG_template_type_param | |
17594 | DW_AT_type DW_FORM_ref_udata (E) | |
17595 | ||
17596 | Besides being broken debug info, it can put GDB into an | |
17597 | infinite loop. Consider: | |
17598 | ||
17599 | When we're building the full name for Class<E>, we'll start | |
17600 | at Class, and go look over its template type parameters, | |
17601 | finding E. We'll then try to build the full name of E, and | |
17602 | reach here. We're now trying to build the full name of E, | |
17603 | and look over the parent DIE for containing scope. In the | |
17604 | broken case, if we followed the parent DIE of E, we'd again | |
17605 | find Class, and once again go look at its template type | |
17606 | arguments, etc., etc. Simply don't consider such parent die | |
17607 | as source-level parent of this die (it can't be, the language | |
17608 | doesn't allow it), and break the loop here. */ | |
17609 | name = dwarf2_name (die, cu); | |
17610 | parent_name = dwarf2_name (parent, cu); | |
17611 | complaint (&symfile_complaints, | |
17612 | _("template param type '%s' defined within parent '%s'"), | |
17613 | name ? name : "<unknown>", | |
17614 | parent_name ? parent_name : "<unknown>"); | |
17615 | return ""; | |
17616 | } | |
63d06c5c | 17617 | else |
0114d602 DJ |
17618 | switch (parent->tag) |
17619 | { | |
63d06c5c | 17620 | case DW_TAG_namespace: |
0114d602 | 17621 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
17622 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
17623 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
17624 | Work around this problem here. */ | |
17625 | if (cu->language == language_cplus | |
17626 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
17627 | return ""; | |
0114d602 DJ |
17628 | /* We give a name to even anonymous namespaces. */ |
17629 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 17630 | case DW_TAG_class_type: |
680b30c7 | 17631 | case DW_TAG_interface_type: |
63d06c5c | 17632 | case DW_TAG_structure_type: |
0114d602 | 17633 | case DW_TAG_union_type: |
f55ee35c | 17634 | case DW_TAG_module: |
0114d602 DJ |
17635 | parent_type = read_type_die (parent, cu); |
17636 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
17637 | return TYPE_TAG_NAME (parent_type); | |
17638 | else | |
17639 | /* An anonymous structure is only allowed non-static data | |
17640 | members; no typedefs, no member functions, et cetera. | |
17641 | So it does not need a prefix. */ | |
17642 | return ""; | |
abc72ce4 | 17643 | case DW_TAG_compile_unit: |
95554aad | 17644 | case DW_TAG_partial_unit: |
abc72ce4 DE |
17645 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
17646 | if (cu->language == language_cplus | |
8b70b953 | 17647 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17648 | && die->child != NULL |
17649 | && (die->tag == DW_TAG_class_type | |
17650 | || die->tag == DW_TAG_structure_type | |
17651 | || die->tag == DW_TAG_union_type)) | |
17652 | { | |
17653 | char *name = guess_full_die_structure_name (die, cu); | |
17654 | if (name != NULL) | |
17655 | return name; | |
17656 | } | |
17657 | return ""; | |
63d06c5c | 17658 | default: |
8176b9b8 | 17659 | return determine_prefix (parent, cu); |
63d06c5c | 17660 | } |
63d06c5c DC |
17661 | } |
17662 | ||
3e43a32a MS |
17663 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
17664 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
17665 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
17666 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
17667 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 17668 | |
f55ee35c | 17669 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
17670 | |
17671 | static char * | |
f55ee35c JK |
17672 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
17673 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 17674 | { |
f55ee35c | 17675 | const char *lead = ""; |
5c315b68 | 17676 | const char *sep; |
63d06c5c | 17677 | |
3e43a32a MS |
17678 | if (suffix == NULL || suffix[0] == '\0' |
17679 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
17680 | sep = ""; |
17681 | else if (cu->language == language_java) | |
17682 | sep = "."; | |
f55ee35c JK |
17683 | else if (cu->language == language_fortran && physname) |
17684 | { | |
17685 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
17686 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
17687 | ||
17688 | lead = "__"; | |
17689 | sep = "_MOD_"; | |
17690 | } | |
987504bb JJ |
17691 | else |
17692 | sep = "::"; | |
63d06c5c | 17693 | |
6dd47d34 DE |
17694 | if (prefix == NULL) |
17695 | prefix = ""; | |
17696 | if (suffix == NULL) | |
17697 | suffix = ""; | |
17698 | ||
987504bb JJ |
17699 | if (obs == NULL) |
17700 | { | |
3e43a32a MS |
17701 | char *retval |
17702 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 17703 | |
f55ee35c JK |
17704 | strcpy (retval, lead); |
17705 | strcat (retval, prefix); | |
6dd47d34 DE |
17706 | strcat (retval, sep); |
17707 | strcat (retval, suffix); | |
63d06c5c DC |
17708 | return retval; |
17709 | } | |
987504bb JJ |
17710 | else |
17711 | { | |
17712 | /* We have an obstack. */ | |
f55ee35c | 17713 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 17714 | } |
63d06c5c DC |
17715 | } |
17716 | ||
c906108c SS |
17717 | /* Return sibling of die, NULL if no sibling. */ |
17718 | ||
f9aca02d | 17719 | static struct die_info * |
fba45db2 | 17720 | sibling_die (struct die_info *die) |
c906108c | 17721 | { |
639d11d3 | 17722 | return die->sibling; |
c906108c SS |
17723 | } |
17724 | ||
71c25dea TT |
17725 | /* Get name of a die, return NULL if not found. */ |
17726 | ||
15d034d0 TT |
17727 | static const char * |
17728 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
17729 | struct obstack *obstack) |
17730 | { | |
17731 | if (name && cu->language == language_cplus) | |
17732 | { | |
17733 | char *canon_name = cp_canonicalize_string (name); | |
17734 | ||
17735 | if (canon_name != NULL) | |
17736 | { | |
17737 | if (strcmp (canon_name, name) != 0) | |
10f0c4bb | 17738 | name = obstack_copy0 (obstack, canon_name, strlen (canon_name)); |
71c25dea TT |
17739 | xfree (canon_name); |
17740 | } | |
17741 | } | |
17742 | ||
17743 | return name; | |
c906108c SS |
17744 | } |
17745 | ||
9219021c DC |
17746 | /* Get name of a die, return NULL if not found. */ |
17747 | ||
15d034d0 | 17748 | static const char * |
e142c38c | 17749 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
17750 | { |
17751 | struct attribute *attr; | |
17752 | ||
e142c38c | 17753 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
17754 | if ((!attr || !DW_STRING (attr)) |
17755 | && die->tag != DW_TAG_class_type | |
17756 | && die->tag != DW_TAG_interface_type | |
17757 | && die->tag != DW_TAG_structure_type | |
17758 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
17759 | return NULL; |
17760 | ||
17761 | switch (die->tag) | |
17762 | { | |
17763 | case DW_TAG_compile_unit: | |
95554aad | 17764 | case DW_TAG_partial_unit: |
71c25dea TT |
17765 | /* Compilation units have a DW_AT_name that is a filename, not |
17766 | a source language identifier. */ | |
17767 | case DW_TAG_enumeration_type: | |
17768 | case DW_TAG_enumerator: | |
17769 | /* These tags always have simple identifiers already; no need | |
17770 | to canonicalize them. */ | |
17771 | return DW_STRING (attr); | |
907af001 | 17772 | |
418835cc KS |
17773 | case DW_TAG_subprogram: |
17774 | /* Java constructors will all be named "<init>", so return | |
17775 | the class name when we see this special case. */ | |
17776 | if (cu->language == language_java | |
17777 | && DW_STRING (attr) != NULL | |
17778 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
17779 | { | |
17780 | struct dwarf2_cu *spec_cu = cu; | |
17781 | struct die_info *spec_die; | |
17782 | ||
17783 | /* GCJ will output '<init>' for Java constructor names. | |
17784 | For this special case, return the name of the parent class. */ | |
17785 | ||
17786 | /* GCJ may output suprogram DIEs with AT_specification set. | |
17787 | If so, use the name of the specified DIE. */ | |
17788 | spec_die = die_specification (die, &spec_cu); | |
17789 | if (spec_die != NULL) | |
17790 | return dwarf2_name (spec_die, spec_cu); | |
17791 | ||
17792 | do | |
17793 | { | |
17794 | die = die->parent; | |
17795 | if (die->tag == DW_TAG_class_type) | |
17796 | return dwarf2_name (die, cu); | |
17797 | } | |
95554aad TT |
17798 | while (die->tag != DW_TAG_compile_unit |
17799 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 17800 | } |
907af001 UW |
17801 | break; |
17802 | ||
17803 | case DW_TAG_class_type: | |
17804 | case DW_TAG_interface_type: | |
17805 | case DW_TAG_structure_type: | |
17806 | case DW_TAG_union_type: | |
17807 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
17808 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
17809 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
17810 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
17811 | if (attr && DW_STRING (attr) |
17812 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
17813 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 17814 | return NULL; |
53832f31 TT |
17815 | |
17816 | /* GCC might emit a nameless typedef that has a linkage name. See | |
17817 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17818 | if (!attr || DW_STRING (attr) == NULL) | |
17819 | { | |
df5c6c50 | 17820 | char *demangled = NULL; |
53832f31 TT |
17821 | |
17822 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
17823 | if (attr == NULL) | |
17824 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
17825 | ||
17826 | if (attr == NULL || DW_STRING (attr) == NULL) | |
17827 | return NULL; | |
17828 | ||
df5c6c50 JK |
17829 | /* Avoid demangling DW_STRING (attr) the second time on a second |
17830 | call for the same DIE. */ | |
17831 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 17832 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
17833 | |
17834 | if (demangled) | |
17835 | { | |
96408a79 SA |
17836 | char *base; |
17837 | ||
53832f31 | 17838 | /* FIXME: we already did this for the partial symbol... */ |
10f0c4bb TT |
17839 | DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack, |
17840 | demangled, strlen (demangled)); | |
53832f31 TT |
17841 | DW_STRING_IS_CANONICAL (attr) = 1; |
17842 | xfree (demangled); | |
96408a79 SA |
17843 | |
17844 | /* Strip any leading namespaces/classes, keep only the base name. | |
17845 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17846 | base = strrchr (DW_STRING (attr), ':'); | |
17847 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
17848 | return &base[1]; | |
17849 | else | |
17850 | return DW_STRING (attr); | |
53832f31 TT |
17851 | } |
17852 | } | |
907af001 UW |
17853 | break; |
17854 | ||
71c25dea | 17855 | default: |
907af001 UW |
17856 | break; |
17857 | } | |
17858 | ||
17859 | if (!DW_STRING_IS_CANONICAL (attr)) | |
17860 | { | |
17861 | DW_STRING (attr) | |
17862 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
17863 | &cu->objfile->objfile_obstack); | |
17864 | DW_STRING_IS_CANONICAL (attr) = 1; | |
71c25dea | 17865 | } |
907af001 | 17866 | return DW_STRING (attr); |
9219021c DC |
17867 | } |
17868 | ||
17869 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
17870 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
17871 | containing the return value on output. */ | |
9219021c DC |
17872 | |
17873 | static struct die_info * | |
f2f0e013 | 17874 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
17875 | { |
17876 | struct attribute *attr; | |
9219021c | 17877 | |
f2f0e013 | 17878 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
17879 | if (attr == NULL) |
17880 | return NULL; | |
17881 | ||
f2f0e013 | 17882 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
17883 | } |
17884 | ||
c906108c SS |
17885 | /* Convert a DIE tag into its string name. */ |
17886 | ||
f39c6ffd | 17887 | static const char * |
aa1ee363 | 17888 | dwarf_tag_name (unsigned tag) |
c906108c | 17889 | { |
f39c6ffd TT |
17890 | const char *name = get_DW_TAG_name (tag); |
17891 | ||
17892 | if (name == NULL) | |
17893 | return "DW_TAG_<unknown>"; | |
17894 | ||
17895 | return name; | |
c906108c SS |
17896 | } |
17897 | ||
17898 | /* Convert a DWARF attribute code into its string name. */ | |
17899 | ||
f39c6ffd | 17900 | static const char * |
aa1ee363 | 17901 | dwarf_attr_name (unsigned attr) |
c906108c | 17902 | { |
f39c6ffd TT |
17903 | const char *name; |
17904 | ||
c764a876 | 17905 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
17906 | if (attr == DW_AT_MIPS_fde) |
17907 | return "DW_AT_MIPS_fde"; | |
17908 | #else | |
17909 | if (attr == DW_AT_HP_block_index) | |
17910 | return "DW_AT_HP_block_index"; | |
c764a876 | 17911 | #endif |
f39c6ffd TT |
17912 | |
17913 | name = get_DW_AT_name (attr); | |
17914 | ||
17915 | if (name == NULL) | |
17916 | return "DW_AT_<unknown>"; | |
17917 | ||
17918 | return name; | |
c906108c SS |
17919 | } |
17920 | ||
17921 | /* Convert a DWARF value form code into its string name. */ | |
17922 | ||
f39c6ffd | 17923 | static const char * |
aa1ee363 | 17924 | dwarf_form_name (unsigned form) |
c906108c | 17925 | { |
f39c6ffd TT |
17926 | const char *name = get_DW_FORM_name (form); |
17927 | ||
17928 | if (name == NULL) | |
17929 | return "DW_FORM_<unknown>"; | |
17930 | ||
17931 | return name; | |
c906108c SS |
17932 | } |
17933 | ||
17934 | static char * | |
fba45db2 | 17935 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
17936 | { |
17937 | if (mybool) | |
17938 | return "TRUE"; | |
17939 | else | |
17940 | return "FALSE"; | |
17941 | } | |
17942 | ||
17943 | /* Convert a DWARF type code into its string name. */ | |
17944 | ||
f39c6ffd | 17945 | static const char * |
aa1ee363 | 17946 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 17947 | { |
f39c6ffd | 17948 | const char *name = get_DW_ATE_name (enc); |
c906108c | 17949 | |
f39c6ffd TT |
17950 | if (name == NULL) |
17951 | return "DW_ATE_<unknown>"; | |
c906108c | 17952 | |
f39c6ffd | 17953 | return name; |
c906108c | 17954 | } |
c906108c | 17955 | |
f9aca02d | 17956 | static void |
d97bc12b | 17957 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
17958 | { |
17959 | unsigned int i; | |
17960 | ||
d97bc12b DE |
17961 | print_spaces (indent, f); |
17962 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 17963 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
17964 | |
17965 | if (die->parent != NULL) | |
17966 | { | |
17967 | print_spaces (indent, f); | |
17968 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 17969 | die->parent->offset.sect_off); |
d97bc12b DE |
17970 | } |
17971 | ||
17972 | print_spaces (indent, f); | |
17973 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 17974 | dwarf_bool_name (die->child != NULL)); |
c906108c | 17975 | |
d97bc12b DE |
17976 | print_spaces (indent, f); |
17977 | fprintf_unfiltered (f, " attributes:\n"); | |
17978 | ||
c906108c SS |
17979 | for (i = 0; i < die->num_attrs; ++i) |
17980 | { | |
d97bc12b DE |
17981 | print_spaces (indent, f); |
17982 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
17983 | dwarf_attr_name (die->attrs[i].name), |
17984 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 17985 | |
c906108c SS |
17986 | switch (die->attrs[i].form) |
17987 | { | |
c906108c | 17988 | case DW_FORM_addr: |
3019eac3 | 17989 | case DW_FORM_GNU_addr_index: |
d97bc12b | 17990 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 17991 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
17992 | break; |
17993 | case DW_FORM_block2: | |
17994 | case DW_FORM_block4: | |
17995 | case DW_FORM_block: | |
17996 | case DW_FORM_block1: | |
56eb65bd SP |
17997 | fprintf_unfiltered (f, "block: size %s", |
17998 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 17999 | break; |
2dc7f7b3 | 18000 | case DW_FORM_exprloc: |
56eb65bd SP |
18001 | fprintf_unfiltered (f, "expression: size %s", |
18002 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 18003 | break; |
4568ecf9 DE |
18004 | case DW_FORM_ref_addr: |
18005 | fprintf_unfiltered (f, "ref address: "); | |
18006 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
18007 | break; | |
36586728 TT |
18008 | case DW_FORM_GNU_ref_alt: |
18009 | fprintf_unfiltered (f, "alt ref address: "); | |
18010 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
18011 | break; | |
10b3939b DJ |
18012 | case DW_FORM_ref1: |
18013 | case DW_FORM_ref2: | |
18014 | case DW_FORM_ref4: | |
4568ecf9 DE |
18015 | case DW_FORM_ref8: |
18016 | case DW_FORM_ref_udata: | |
d97bc12b | 18017 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 18018 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 18019 | break; |
c906108c SS |
18020 | case DW_FORM_data1: |
18021 | case DW_FORM_data2: | |
18022 | case DW_FORM_data4: | |
ce5d95e1 | 18023 | case DW_FORM_data8: |
c906108c SS |
18024 | case DW_FORM_udata: |
18025 | case DW_FORM_sdata: | |
43bbcdc2 PH |
18026 | fprintf_unfiltered (f, "constant: %s", |
18027 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 18028 | break; |
2dc7f7b3 TT |
18029 | case DW_FORM_sec_offset: |
18030 | fprintf_unfiltered (f, "section offset: %s", | |
18031 | pulongest (DW_UNSND (&die->attrs[i]))); | |
18032 | break; | |
55f1336d | 18033 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
18034 | fprintf_unfiltered (f, "signature: %s", |
18035 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 18036 | break; |
c906108c | 18037 | case DW_FORM_string: |
4bdf3d34 | 18038 | case DW_FORM_strp: |
3019eac3 | 18039 | case DW_FORM_GNU_str_index: |
36586728 | 18040 | case DW_FORM_GNU_strp_alt: |
8285870a | 18041 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 18042 | DW_STRING (&die->attrs[i]) |
8285870a JK |
18043 | ? DW_STRING (&die->attrs[i]) : "", |
18044 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
18045 | break; |
18046 | case DW_FORM_flag: | |
18047 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 18048 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 18049 | else |
d97bc12b | 18050 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 18051 | break; |
2dc7f7b3 TT |
18052 | case DW_FORM_flag_present: |
18053 | fprintf_unfiltered (f, "flag: TRUE"); | |
18054 | break; | |
a8329558 | 18055 | case DW_FORM_indirect: |
0963b4bd MS |
18056 | /* The reader will have reduced the indirect form to |
18057 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
18058 | fprintf_unfiltered (f, |
18059 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 18060 | break; |
c906108c | 18061 | default: |
d97bc12b | 18062 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 18063 | die->attrs[i].form); |
d97bc12b | 18064 | break; |
c906108c | 18065 | } |
d97bc12b | 18066 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
18067 | } |
18068 | } | |
18069 | ||
f9aca02d | 18070 | static void |
d97bc12b | 18071 | dump_die_for_error (struct die_info *die) |
c906108c | 18072 | { |
d97bc12b DE |
18073 | dump_die_shallow (gdb_stderr, 0, die); |
18074 | } | |
18075 | ||
18076 | static void | |
18077 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
18078 | { | |
18079 | int indent = level * 4; | |
18080 | ||
18081 | gdb_assert (die != NULL); | |
18082 | ||
18083 | if (level >= max_level) | |
18084 | return; | |
18085 | ||
18086 | dump_die_shallow (f, indent, die); | |
18087 | ||
18088 | if (die->child != NULL) | |
c906108c | 18089 | { |
d97bc12b DE |
18090 | print_spaces (indent, f); |
18091 | fprintf_unfiltered (f, " Children:"); | |
18092 | if (level + 1 < max_level) | |
18093 | { | |
18094 | fprintf_unfiltered (f, "\n"); | |
18095 | dump_die_1 (f, level + 1, max_level, die->child); | |
18096 | } | |
18097 | else | |
18098 | { | |
3e43a32a MS |
18099 | fprintf_unfiltered (f, |
18100 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
18101 | } |
18102 | } | |
18103 | ||
18104 | if (die->sibling != NULL && level > 0) | |
18105 | { | |
18106 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
18107 | } |
18108 | } | |
18109 | ||
d97bc12b DE |
18110 | /* This is called from the pdie macro in gdbinit.in. |
18111 | It's not static so gcc will keep a copy callable from gdb. */ | |
18112 | ||
18113 | void | |
18114 | dump_die (struct die_info *die, int max_level) | |
18115 | { | |
18116 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
18117 | } | |
18118 | ||
f9aca02d | 18119 | static void |
51545339 | 18120 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 18121 | { |
51545339 | 18122 | void **slot; |
c906108c | 18123 | |
b64f50a1 JK |
18124 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
18125 | INSERT); | |
51545339 DJ |
18126 | |
18127 | *slot = die; | |
c906108c SS |
18128 | } |
18129 | ||
b64f50a1 JK |
18130 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
18131 | required kind. */ | |
18132 | ||
18133 | static sect_offset | |
ff39bb5e | 18134 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 18135 | { |
4568ecf9 | 18136 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 18137 | |
7771576e | 18138 | if (attr_form_is_ref (attr)) |
b64f50a1 | 18139 | return retval; |
93311388 | 18140 | |
b64f50a1 | 18141 | retval.sect_off = 0; |
93311388 DE |
18142 | complaint (&symfile_complaints, |
18143 | _("unsupported die ref attribute form: '%s'"), | |
18144 | dwarf_form_name (attr->form)); | |
b64f50a1 | 18145 | return retval; |
c906108c SS |
18146 | } |
18147 | ||
43bbcdc2 PH |
18148 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
18149 | * the value held by the attribute is not constant. */ | |
a02abb62 | 18150 | |
43bbcdc2 | 18151 | static LONGEST |
ff39bb5e | 18152 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 JB |
18153 | { |
18154 | if (attr->form == DW_FORM_sdata) | |
18155 | return DW_SND (attr); | |
18156 | else if (attr->form == DW_FORM_udata | |
18157 | || attr->form == DW_FORM_data1 | |
18158 | || attr->form == DW_FORM_data2 | |
18159 | || attr->form == DW_FORM_data4 | |
18160 | || attr->form == DW_FORM_data8) | |
18161 | return DW_UNSND (attr); | |
18162 | else | |
18163 | { | |
3e43a32a MS |
18164 | complaint (&symfile_complaints, |
18165 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
18166 | dwarf_form_name (attr->form)); |
18167 | return default_value; | |
18168 | } | |
18169 | } | |
18170 | ||
348e048f DE |
18171 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
18172 | On entry *REF_CU is the CU of SRC_DIE. | |
18173 | On exit *REF_CU is the CU of the result. */ | |
18174 | ||
18175 | static struct die_info * | |
ff39bb5e | 18176 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
18177 | struct dwarf2_cu **ref_cu) |
18178 | { | |
18179 | struct die_info *die; | |
18180 | ||
7771576e | 18181 | if (attr_form_is_ref (attr)) |
348e048f | 18182 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 18183 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
18184 | die = follow_die_sig (src_die, attr, ref_cu); |
18185 | else | |
18186 | { | |
18187 | dump_die_for_error (src_die); | |
18188 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
4262abfb | 18189 | objfile_name ((*ref_cu)->objfile)); |
348e048f DE |
18190 | } |
18191 | ||
18192 | return die; | |
03dd20cc DJ |
18193 | } |
18194 | ||
5c631832 | 18195 | /* Follow reference OFFSET. |
673bfd45 DE |
18196 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
18197 | On exit *REF_CU is the CU of the result. | |
18198 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 18199 | |
f9aca02d | 18200 | static struct die_info * |
36586728 TT |
18201 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
18202 | struct dwarf2_cu **ref_cu) | |
c906108c | 18203 | { |
10b3939b | 18204 | struct die_info temp_die; |
f2f0e013 | 18205 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 18206 | |
348e048f DE |
18207 | gdb_assert (cu->per_cu != NULL); |
18208 | ||
98bfdba5 PA |
18209 | target_cu = cu; |
18210 | ||
3019eac3 | 18211 | if (cu->per_cu->is_debug_types) |
348e048f DE |
18212 | { |
18213 | /* .debug_types CUs cannot reference anything outside their CU. | |
18214 | If they need to, they have to reference a signatured type via | |
55f1336d | 18215 | DW_FORM_ref_sig8. */ |
348e048f | 18216 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 18217 | return NULL; |
348e048f | 18218 | } |
36586728 TT |
18219 | else if (offset_in_dwz != cu->per_cu->is_dwz |
18220 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
18221 | { |
18222 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 18223 | |
36586728 TT |
18224 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
18225 | cu->objfile); | |
03dd20cc DJ |
18226 | |
18227 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
18228 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
18229 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 18230 | |
10b3939b DJ |
18231 | target_cu = per_cu->cu; |
18232 | } | |
98bfdba5 PA |
18233 | else if (cu->dies == NULL) |
18234 | { | |
18235 | /* We're loading full DIEs during partial symbol reading. */ | |
18236 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 18237 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 18238 | } |
c906108c | 18239 | |
f2f0e013 | 18240 | *ref_cu = target_cu; |
51545339 | 18241 | temp_die.offset = offset; |
b64f50a1 | 18242 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 18243 | } |
10b3939b | 18244 | |
5c631832 JK |
18245 | /* Follow reference attribute ATTR of SRC_DIE. |
18246 | On entry *REF_CU is the CU of SRC_DIE. | |
18247 | On exit *REF_CU is the CU of the result. */ | |
18248 | ||
18249 | static struct die_info * | |
ff39bb5e | 18250 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
18251 | struct dwarf2_cu **ref_cu) |
18252 | { | |
b64f50a1 | 18253 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
18254 | struct dwarf2_cu *cu = *ref_cu; |
18255 | struct die_info *die; | |
18256 | ||
36586728 TT |
18257 | die = follow_die_offset (offset, |
18258 | (attr->form == DW_FORM_GNU_ref_alt | |
18259 | || cu->per_cu->is_dwz), | |
18260 | ref_cu); | |
5c631832 JK |
18261 | if (!die) |
18262 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
18263 | "at 0x%x [in module %s]"), | |
4262abfb JK |
18264 | offset.sect_off, src_die->offset.sect_off, |
18265 | objfile_name (cu->objfile)); | |
348e048f | 18266 | |
5c631832 JK |
18267 | return die; |
18268 | } | |
18269 | ||
d83e736b JK |
18270 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
18271 | Returned value is intended for DW_OP_call*. Returned | |
18272 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
18273 | |
18274 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
18275 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
18276 | struct dwarf2_per_cu_data *per_cu, | |
18277 | CORE_ADDR (*get_frame_pc) (void *baton), | |
18278 | void *baton) | |
5c631832 | 18279 | { |
918dd910 | 18280 | struct dwarf2_cu *cu; |
5c631832 JK |
18281 | struct die_info *die; |
18282 | struct attribute *attr; | |
18283 | struct dwarf2_locexpr_baton retval; | |
18284 | ||
8cf6f0b1 TT |
18285 | dw2_setup (per_cu->objfile); |
18286 | ||
918dd910 JK |
18287 | if (per_cu->cu == NULL) |
18288 | load_cu (per_cu); | |
18289 | cu = per_cu->cu; | |
18290 | ||
36586728 | 18291 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
18292 | if (!die) |
18293 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 18294 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
18295 | |
18296 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
18297 | if (!attr) | |
18298 | { | |
e103e986 JK |
18299 | /* DWARF: "If there is no such attribute, then there is no effect.". |
18300 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 18301 | |
e103e986 | 18302 | retval.data = NULL; |
5c631832 JK |
18303 | retval.size = 0; |
18304 | } | |
8cf6f0b1 TT |
18305 | else if (attr_form_is_section_offset (attr)) |
18306 | { | |
18307 | struct dwarf2_loclist_baton loclist_baton; | |
18308 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
18309 | size_t size; | |
18310 | ||
18311 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
18312 | ||
18313 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
18314 | &size, pc); | |
18315 | retval.size = size; | |
18316 | } | |
5c631832 JK |
18317 | else |
18318 | { | |
18319 | if (!attr_form_is_block (attr)) | |
18320 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
18321 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
4262abfb | 18322 | offset.sect_off, objfile_name (per_cu->objfile)); |
5c631832 JK |
18323 | |
18324 | retval.data = DW_BLOCK (attr)->data; | |
18325 | retval.size = DW_BLOCK (attr)->size; | |
18326 | } | |
18327 | retval.per_cu = cu->per_cu; | |
918dd910 | 18328 | |
918dd910 JK |
18329 | age_cached_comp_units (); |
18330 | ||
5c631832 | 18331 | return retval; |
348e048f DE |
18332 | } |
18333 | ||
8b9737bf TT |
18334 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
18335 | offset. */ | |
18336 | ||
18337 | struct dwarf2_locexpr_baton | |
18338 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
18339 | struct dwarf2_per_cu_data *per_cu, | |
18340 | CORE_ADDR (*get_frame_pc) (void *baton), | |
18341 | void *baton) | |
18342 | { | |
18343 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
18344 | ||
18345 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
18346 | } | |
18347 | ||
b6807d98 TT |
18348 | /* Write a constant of a given type as target-ordered bytes into |
18349 | OBSTACK. */ | |
18350 | ||
18351 | static const gdb_byte * | |
18352 | write_constant_as_bytes (struct obstack *obstack, | |
18353 | enum bfd_endian byte_order, | |
18354 | struct type *type, | |
18355 | ULONGEST value, | |
18356 | LONGEST *len) | |
18357 | { | |
18358 | gdb_byte *result; | |
18359 | ||
18360 | *len = TYPE_LENGTH (type); | |
18361 | result = obstack_alloc (obstack, *len); | |
18362 | store_unsigned_integer (result, *len, byte_order, value); | |
18363 | ||
18364 | return result; | |
18365 | } | |
18366 | ||
18367 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
18368 | pointer to the constant bytes and set LEN to the length of the | |
18369 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
18370 | does not have a DW_AT_const_value, return NULL. */ | |
18371 | ||
18372 | const gdb_byte * | |
18373 | dwarf2_fetch_constant_bytes (sect_offset offset, | |
18374 | struct dwarf2_per_cu_data *per_cu, | |
18375 | struct obstack *obstack, | |
18376 | LONGEST *len) | |
18377 | { | |
18378 | struct dwarf2_cu *cu; | |
18379 | struct die_info *die; | |
18380 | struct attribute *attr; | |
18381 | const gdb_byte *result = NULL; | |
18382 | struct type *type; | |
18383 | LONGEST value; | |
18384 | enum bfd_endian byte_order; | |
18385 | ||
18386 | dw2_setup (per_cu->objfile); | |
18387 | ||
18388 | if (per_cu->cu == NULL) | |
18389 | load_cu (per_cu); | |
18390 | cu = per_cu->cu; | |
18391 | ||
18392 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); | |
18393 | if (!die) | |
18394 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
4262abfb | 18395 | offset.sect_off, objfile_name (per_cu->objfile)); |
b6807d98 TT |
18396 | |
18397 | ||
18398 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
18399 | if (attr == NULL) | |
18400 | return NULL; | |
18401 | ||
18402 | byte_order = (bfd_big_endian (per_cu->objfile->obfd) | |
18403 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
18404 | ||
18405 | switch (attr->form) | |
18406 | { | |
18407 | case DW_FORM_addr: | |
18408 | case DW_FORM_GNU_addr_index: | |
18409 | { | |
18410 | gdb_byte *tem; | |
18411 | ||
18412 | *len = cu->header.addr_size; | |
18413 | tem = obstack_alloc (obstack, *len); | |
18414 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); | |
18415 | result = tem; | |
18416 | } | |
18417 | break; | |
18418 | case DW_FORM_string: | |
18419 | case DW_FORM_strp: | |
18420 | case DW_FORM_GNU_str_index: | |
18421 | case DW_FORM_GNU_strp_alt: | |
18422 | /* DW_STRING is already allocated on the objfile obstack, point | |
18423 | directly to it. */ | |
18424 | result = (const gdb_byte *) DW_STRING (attr); | |
18425 | *len = strlen (DW_STRING (attr)); | |
18426 | break; | |
18427 | case DW_FORM_block1: | |
18428 | case DW_FORM_block2: | |
18429 | case DW_FORM_block4: | |
18430 | case DW_FORM_block: | |
18431 | case DW_FORM_exprloc: | |
18432 | result = DW_BLOCK (attr)->data; | |
18433 | *len = DW_BLOCK (attr)->size; | |
18434 | break; | |
18435 | ||
18436 | /* The DW_AT_const_value attributes are supposed to carry the | |
18437 | symbol's value "represented as it would be on the target | |
18438 | architecture." By the time we get here, it's already been | |
18439 | converted to host endianness, so we just need to sign- or | |
18440 | zero-extend it as appropriate. */ | |
18441 | case DW_FORM_data1: | |
18442 | type = die_type (die, cu); | |
18443 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
18444 | if (result == NULL) | |
18445 | result = write_constant_as_bytes (obstack, byte_order, | |
18446 | type, value, len); | |
18447 | break; | |
18448 | case DW_FORM_data2: | |
18449 | type = die_type (die, cu); | |
18450 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
18451 | if (result == NULL) | |
18452 | result = write_constant_as_bytes (obstack, byte_order, | |
18453 | type, value, len); | |
18454 | break; | |
18455 | case DW_FORM_data4: | |
18456 | type = die_type (die, cu); | |
18457 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
18458 | if (result == NULL) | |
18459 | result = write_constant_as_bytes (obstack, byte_order, | |
18460 | type, value, len); | |
18461 | break; | |
18462 | case DW_FORM_data8: | |
18463 | type = die_type (die, cu); | |
18464 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
18465 | if (result == NULL) | |
18466 | result = write_constant_as_bytes (obstack, byte_order, | |
18467 | type, value, len); | |
18468 | break; | |
18469 | ||
18470 | case DW_FORM_sdata: | |
18471 | type = die_type (die, cu); | |
18472 | result = write_constant_as_bytes (obstack, byte_order, | |
18473 | type, DW_SND (attr), len); | |
18474 | break; | |
18475 | ||
18476 | case DW_FORM_udata: | |
18477 | type = die_type (die, cu); | |
18478 | result = write_constant_as_bytes (obstack, byte_order, | |
18479 | type, DW_UNSND (attr), len); | |
18480 | break; | |
18481 | ||
18482 | default: | |
18483 | complaint (&symfile_complaints, | |
18484 | _("unsupported const value attribute form: '%s'"), | |
18485 | dwarf_form_name (attr->form)); | |
18486 | break; | |
18487 | } | |
18488 | ||
18489 | return result; | |
18490 | } | |
18491 | ||
8a9b8146 TT |
18492 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
18493 | PER_CU. */ | |
18494 | ||
18495 | struct type * | |
b64f50a1 | 18496 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
18497 | struct dwarf2_per_cu_data *per_cu) |
18498 | { | |
b64f50a1 JK |
18499 | sect_offset die_offset_sect; |
18500 | ||
8a9b8146 | 18501 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
18502 | |
18503 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
18504 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
18505 | } |
18506 | ||
ac9ec31b | 18507 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 18508 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
18509 | On exit *REF_CU is the CU of the result. |
18510 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
18511 | |
18512 | static struct die_info * | |
ac9ec31b DE |
18513 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
18514 | struct dwarf2_cu **ref_cu) | |
348e048f DE |
18515 | { |
18516 | struct objfile *objfile = (*ref_cu)->objfile; | |
18517 | struct die_info temp_die; | |
348e048f DE |
18518 | struct dwarf2_cu *sig_cu; |
18519 | struct die_info *die; | |
18520 | ||
ac9ec31b DE |
18521 | /* While it might be nice to assert sig_type->type == NULL here, |
18522 | we can get here for DW_AT_imported_declaration where we need | |
18523 | the DIE not the type. */ | |
348e048f DE |
18524 | |
18525 | /* If necessary, add it to the queue and load its DIEs. */ | |
18526 | ||
95554aad | 18527 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 18528 | read_signatured_type (sig_type); |
348e048f | 18529 | |
348e048f | 18530 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 18531 | gdb_assert (sig_cu != NULL); |
3019eac3 DE |
18532 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
18533 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
18534 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
18535 | temp_die.offset.sect_off); | |
348e048f DE |
18536 | if (die) |
18537 | { | |
796a7ff8 DE |
18538 | /* For .gdb_index version 7 keep track of included TUs. |
18539 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
18540 | if (dwarf2_per_objfile->index_table != NULL | |
18541 | && dwarf2_per_objfile->index_table->version <= 7) | |
18542 | { | |
18543 | VEC_safe_push (dwarf2_per_cu_ptr, | |
18544 | (*ref_cu)->per_cu->imported_symtabs, | |
18545 | sig_cu->per_cu); | |
18546 | } | |
18547 | ||
348e048f DE |
18548 | *ref_cu = sig_cu; |
18549 | return die; | |
18550 | } | |
18551 | ||
ac9ec31b DE |
18552 | return NULL; |
18553 | } | |
18554 | ||
18555 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
18556 | On entry *REF_CU is the CU of SRC_DIE. | |
18557 | On exit *REF_CU is the CU of the result. | |
18558 | The result is the DIE of the type. | |
18559 | If the referenced type cannot be found an error is thrown. */ | |
18560 | ||
18561 | static struct die_info * | |
ff39bb5e | 18562 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
18563 | struct dwarf2_cu **ref_cu) |
18564 | { | |
18565 | ULONGEST signature = DW_SIGNATURE (attr); | |
18566 | struct signatured_type *sig_type; | |
18567 | struct die_info *die; | |
18568 | ||
18569 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
18570 | ||
a2ce51a0 | 18571 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
18572 | /* sig_type will be NULL if the signatured type is missing from |
18573 | the debug info. */ | |
18574 | if (sig_type == NULL) | |
18575 | { | |
18576 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
18577 | " from DIE at 0x%x [in module %s]"), | |
18578 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 18579 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
18580 | } |
18581 | ||
18582 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
18583 | if (die == NULL) | |
18584 | { | |
18585 | dump_die_for_error (src_die); | |
18586 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
18587 | " from DIE at 0x%x [in module %s]"), | |
18588 | hex_string (signature), src_die->offset.sect_off, | |
4262abfb | 18589 | objfile_name ((*ref_cu)->objfile)); |
ac9ec31b DE |
18590 | } |
18591 | ||
18592 | return die; | |
18593 | } | |
18594 | ||
18595 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
18596 | reading in and processing the type unit if necessary. */ | |
18597 | ||
18598 | static struct type * | |
18599 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
18600 | struct dwarf2_cu *cu) | |
18601 | { | |
18602 | struct signatured_type *sig_type; | |
18603 | struct dwarf2_cu *type_cu; | |
18604 | struct die_info *type_die; | |
18605 | struct type *type; | |
18606 | ||
a2ce51a0 | 18607 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
18608 | /* sig_type will be NULL if the signatured type is missing from |
18609 | the debug info. */ | |
18610 | if (sig_type == NULL) | |
18611 | { | |
18612 | complaint (&symfile_complaints, | |
18613 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
18614 | " from DIE at 0x%x [in module %s]"), | |
18615 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 18616 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
18617 | return build_error_marker_type (cu, die); |
18618 | } | |
18619 | ||
18620 | /* If we already know the type we're done. */ | |
18621 | if (sig_type->type != NULL) | |
18622 | return sig_type->type; | |
18623 | ||
18624 | type_cu = cu; | |
18625 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
18626 | if (type_die != NULL) | |
18627 | { | |
18628 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
18629 | is created. This is important, for example, because for c++ classes | |
18630 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
18631 | type = read_type_die (type_die, type_cu); | |
18632 | if (type == NULL) | |
18633 | { | |
18634 | complaint (&symfile_complaints, | |
18635 | _("Dwarf Error: Cannot build signatured type %s" | |
18636 | " referenced from DIE at 0x%x [in module %s]"), | |
18637 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 18638 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
18639 | type = build_error_marker_type (cu, die); |
18640 | } | |
18641 | } | |
18642 | else | |
18643 | { | |
18644 | complaint (&symfile_complaints, | |
18645 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
18646 | " from DIE at 0x%x [in module %s]"), | |
18647 | hex_string (signature), die->offset.sect_off, | |
4262abfb | 18648 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
18649 | type = build_error_marker_type (cu, die); |
18650 | } | |
18651 | sig_type->type = type; | |
18652 | ||
18653 | return type; | |
18654 | } | |
18655 | ||
18656 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
18657 | reading in and processing the type unit if necessary. */ | |
18658 | ||
18659 | static struct type * | |
ff39bb5e | 18660 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 18661 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
18662 | { |
18663 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 18664 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
18665 | { |
18666 | struct dwarf2_cu *type_cu = cu; | |
18667 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
18668 | ||
18669 | return read_type_die (type_die, type_cu); | |
18670 | } | |
18671 | else if (attr->form == DW_FORM_ref_sig8) | |
18672 | { | |
18673 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
18674 | } | |
18675 | else | |
18676 | { | |
18677 | complaint (&symfile_complaints, | |
18678 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
18679 | " at 0x%x [in module %s]"), | |
18680 | dwarf_form_name (attr->form), die->offset.sect_off, | |
4262abfb | 18681 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
18682 | return build_error_marker_type (cu, die); |
18683 | } | |
348e048f DE |
18684 | } |
18685 | ||
e5fe5e75 | 18686 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
18687 | |
18688 | static void | |
e5fe5e75 | 18689 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 18690 | { |
52dc124a | 18691 | struct signatured_type *sig_type; |
348e048f | 18692 | |
f4dc4d17 DE |
18693 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
18694 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
18695 | ||
6721b2ec DE |
18696 | /* We have the per_cu, but we need the signatured_type. |
18697 | Fortunately this is an easy translation. */ | |
18698 | gdb_assert (per_cu->is_debug_types); | |
18699 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 18700 | |
6721b2ec | 18701 | gdb_assert (per_cu->cu == NULL); |
348e048f | 18702 | |
52dc124a | 18703 | read_signatured_type (sig_type); |
348e048f | 18704 | |
6721b2ec | 18705 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
18706 | } |
18707 | ||
dee91e82 DE |
18708 | /* die_reader_func for read_signatured_type. |
18709 | This is identical to load_full_comp_unit_reader, | |
18710 | but is kept separate for now. */ | |
348e048f DE |
18711 | |
18712 | static void | |
dee91e82 | 18713 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 18714 | const gdb_byte *info_ptr, |
dee91e82 DE |
18715 | struct die_info *comp_unit_die, |
18716 | int has_children, | |
18717 | void *data) | |
348e048f | 18718 | { |
dee91e82 | 18719 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 18720 | |
dee91e82 DE |
18721 | gdb_assert (cu->die_hash == NULL); |
18722 | cu->die_hash = | |
18723 | htab_create_alloc_ex (cu->header.length / 12, | |
18724 | die_hash, | |
18725 | die_eq, | |
18726 | NULL, | |
18727 | &cu->comp_unit_obstack, | |
18728 | hashtab_obstack_allocate, | |
18729 | dummy_obstack_deallocate); | |
348e048f | 18730 | |
dee91e82 DE |
18731 | if (has_children) |
18732 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
18733 | &info_ptr, comp_unit_die); | |
18734 | cu->dies = comp_unit_die; | |
18735 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
18736 | |
18737 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 18738 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 18739 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
18740 | or we won't be able to build types correctly. |
18741 | Similarly, if we do not read the producer, we can not apply | |
18742 | producer-specific interpretation. */ | |
95554aad | 18743 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 18744 | } |
348e048f | 18745 | |
3019eac3 DE |
18746 | /* Read in a signatured type and build its CU and DIEs. |
18747 | If the type is a stub for the real type in a DWO file, | |
18748 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
18749 | |
18750 | static void | |
18751 | read_signatured_type (struct signatured_type *sig_type) | |
18752 | { | |
18753 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 18754 | |
3019eac3 | 18755 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 18756 | gdb_assert (per_cu->cu == NULL); |
348e048f | 18757 | |
f4dc4d17 DE |
18758 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
18759 | read_signatured_type_reader, NULL); | |
7ee85ab1 | 18760 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
18761 | } |
18762 | ||
c906108c SS |
18763 | /* Decode simple location descriptions. |
18764 | Given a pointer to a dwarf block that defines a location, compute | |
18765 | the location and return the value. | |
18766 | ||
4cecd739 DJ |
18767 | NOTE drow/2003-11-18: This function is called in two situations |
18768 | now: for the address of static or global variables (partial symbols | |
18769 | only) and for offsets into structures which are expected to be | |
18770 | (more or less) constant. The partial symbol case should go away, | |
18771 | and only the constant case should remain. That will let this | |
18772 | function complain more accurately. A few special modes are allowed | |
18773 | without complaint for global variables (for instance, global | |
18774 | register values and thread-local values). | |
c906108c SS |
18775 | |
18776 | A location description containing no operations indicates that the | |
4cecd739 | 18777 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
18778 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
18779 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
18780 | complaint. |
18781 | ||
18782 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
18783 | |
18784 | static CORE_ADDR | |
e7c27a73 | 18785 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 18786 | { |
e7c27a73 | 18787 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
18788 | size_t i; |
18789 | size_t size = blk->size; | |
d521ce57 | 18790 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
18791 | CORE_ADDR stack[64]; |
18792 | int stacki; | |
18793 | unsigned int bytes_read, unsnd; | |
18794 | gdb_byte op; | |
c906108c | 18795 | |
21ae7a4d JK |
18796 | i = 0; |
18797 | stacki = 0; | |
18798 | stack[stacki] = 0; | |
18799 | stack[++stacki] = 0; | |
18800 | ||
18801 | while (i < size) | |
18802 | { | |
18803 | op = data[i++]; | |
18804 | switch (op) | |
18805 | { | |
18806 | case DW_OP_lit0: | |
18807 | case DW_OP_lit1: | |
18808 | case DW_OP_lit2: | |
18809 | case DW_OP_lit3: | |
18810 | case DW_OP_lit4: | |
18811 | case DW_OP_lit5: | |
18812 | case DW_OP_lit6: | |
18813 | case DW_OP_lit7: | |
18814 | case DW_OP_lit8: | |
18815 | case DW_OP_lit9: | |
18816 | case DW_OP_lit10: | |
18817 | case DW_OP_lit11: | |
18818 | case DW_OP_lit12: | |
18819 | case DW_OP_lit13: | |
18820 | case DW_OP_lit14: | |
18821 | case DW_OP_lit15: | |
18822 | case DW_OP_lit16: | |
18823 | case DW_OP_lit17: | |
18824 | case DW_OP_lit18: | |
18825 | case DW_OP_lit19: | |
18826 | case DW_OP_lit20: | |
18827 | case DW_OP_lit21: | |
18828 | case DW_OP_lit22: | |
18829 | case DW_OP_lit23: | |
18830 | case DW_OP_lit24: | |
18831 | case DW_OP_lit25: | |
18832 | case DW_OP_lit26: | |
18833 | case DW_OP_lit27: | |
18834 | case DW_OP_lit28: | |
18835 | case DW_OP_lit29: | |
18836 | case DW_OP_lit30: | |
18837 | case DW_OP_lit31: | |
18838 | stack[++stacki] = op - DW_OP_lit0; | |
18839 | break; | |
f1bea926 | 18840 | |
21ae7a4d JK |
18841 | case DW_OP_reg0: |
18842 | case DW_OP_reg1: | |
18843 | case DW_OP_reg2: | |
18844 | case DW_OP_reg3: | |
18845 | case DW_OP_reg4: | |
18846 | case DW_OP_reg5: | |
18847 | case DW_OP_reg6: | |
18848 | case DW_OP_reg7: | |
18849 | case DW_OP_reg8: | |
18850 | case DW_OP_reg9: | |
18851 | case DW_OP_reg10: | |
18852 | case DW_OP_reg11: | |
18853 | case DW_OP_reg12: | |
18854 | case DW_OP_reg13: | |
18855 | case DW_OP_reg14: | |
18856 | case DW_OP_reg15: | |
18857 | case DW_OP_reg16: | |
18858 | case DW_OP_reg17: | |
18859 | case DW_OP_reg18: | |
18860 | case DW_OP_reg19: | |
18861 | case DW_OP_reg20: | |
18862 | case DW_OP_reg21: | |
18863 | case DW_OP_reg22: | |
18864 | case DW_OP_reg23: | |
18865 | case DW_OP_reg24: | |
18866 | case DW_OP_reg25: | |
18867 | case DW_OP_reg26: | |
18868 | case DW_OP_reg27: | |
18869 | case DW_OP_reg28: | |
18870 | case DW_OP_reg29: | |
18871 | case DW_OP_reg30: | |
18872 | case DW_OP_reg31: | |
18873 | stack[++stacki] = op - DW_OP_reg0; | |
18874 | if (i < size) | |
18875 | dwarf2_complex_location_expr_complaint (); | |
18876 | break; | |
c906108c | 18877 | |
21ae7a4d JK |
18878 | case DW_OP_regx: |
18879 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
18880 | i += bytes_read; | |
18881 | stack[++stacki] = unsnd; | |
18882 | if (i < size) | |
18883 | dwarf2_complex_location_expr_complaint (); | |
18884 | break; | |
c906108c | 18885 | |
21ae7a4d JK |
18886 | case DW_OP_addr: |
18887 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
18888 | cu, &bytes_read); | |
18889 | i += bytes_read; | |
18890 | break; | |
d53d4ac5 | 18891 | |
21ae7a4d JK |
18892 | case DW_OP_const1u: |
18893 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
18894 | i += 1; | |
18895 | break; | |
18896 | ||
18897 | case DW_OP_const1s: | |
18898 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
18899 | i += 1; | |
18900 | break; | |
18901 | ||
18902 | case DW_OP_const2u: | |
18903 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
18904 | i += 2; | |
18905 | break; | |
18906 | ||
18907 | case DW_OP_const2s: | |
18908 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
18909 | i += 2; | |
18910 | break; | |
d53d4ac5 | 18911 | |
21ae7a4d JK |
18912 | case DW_OP_const4u: |
18913 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
18914 | i += 4; | |
18915 | break; | |
18916 | ||
18917 | case DW_OP_const4s: | |
18918 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
18919 | i += 4; | |
18920 | break; | |
18921 | ||
585861ea JK |
18922 | case DW_OP_const8u: |
18923 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
18924 | i += 8; | |
18925 | break; | |
18926 | ||
21ae7a4d JK |
18927 | case DW_OP_constu: |
18928 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
18929 | &bytes_read); | |
18930 | i += bytes_read; | |
18931 | break; | |
18932 | ||
18933 | case DW_OP_consts: | |
18934 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
18935 | i += bytes_read; | |
18936 | break; | |
18937 | ||
18938 | case DW_OP_dup: | |
18939 | stack[stacki + 1] = stack[stacki]; | |
18940 | stacki++; | |
18941 | break; | |
18942 | ||
18943 | case DW_OP_plus: | |
18944 | stack[stacki - 1] += stack[stacki]; | |
18945 | stacki--; | |
18946 | break; | |
18947 | ||
18948 | case DW_OP_plus_uconst: | |
18949 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
18950 | &bytes_read); | |
18951 | i += bytes_read; | |
18952 | break; | |
18953 | ||
18954 | case DW_OP_minus: | |
18955 | stack[stacki - 1] -= stack[stacki]; | |
18956 | stacki--; | |
18957 | break; | |
18958 | ||
18959 | case DW_OP_deref: | |
18960 | /* If we're not the last op, then we definitely can't encode | |
18961 | this using GDB's address_class enum. This is valid for partial | |
18962 | global symbols, although the variable's address will be bogus | |
18963 | in the psymtab. */ | |
18964 | if (i < size) | |
18965 | dwarf2_complex_location_expr_complaint (); | |
18966 | break; | |
18967 | ||
18968 | case DW_OP_GNU_push_tls_address: | |
18969 | /* The top of the stack has the offset from the beginning | |
18970 | of the thread control block at which the variable is located. */ | |
18971 | /* Nothing should follow this operator, so the top of stack would | |
18972 | be returned. */ | |
18973 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
18974 | address will be bogus in the psymtab. Make it always at least |
18975 | non-zero to not look as a variable garbage collected by linker | |
18976 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
18977 | if (i < size) |
18978 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 18979 | stack[stacki]++; |
21ae7a4d JK |
18980 | break; |
18981 | ||
18982 | case DW_OP_GNU_uninit: | |
18983 | break; | |
18984 | ||
3019eac3 | 18985 | case DW_OP_GNU_addr_index: |
49f6c839 | 18986 | case DW_OP_GNU_const_index: |
3019eac3 DE |
18987 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
18988 | &bytes_read); | |
18989 | i += bytes_read; | |
18990 | break; | |
18991 | ||
21ae7a4d JK |
18992 | default: |
18993 | { | |
f39c6ffd | 18994 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
18995 | |
18996 | if (name) | |
18997 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
18998 | name); | |
18999 | else | |
19000 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
19001 | op); | |
19002 | } | |
19003 | ||
19004 | return (stack[stacki]); | |
d53d4ac5 | 19005 | } |
3c6e0cb3 | 19006 | |
21ae7a4d JK |
19007 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
19008 | outside of the allocated space. Also enforce minimum>0. */ | |
19009 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
19010 | { | |
19011 | complaint (&symfile_complaints, | |
19012 | _("location description stack overflow")); | |
19013 | return 0; | |
19014 | } | |
19015 | ||
19016 | if (stacki <= 0) | |
19017 | { | |
19018 | complaint (&symfile_complaints, | |
19019 | _("location description stack underflow")); | |
19020 | return 0; | |
19021 | } | |
19022 | } | |
19023 | return (stack[stacki]); | |
c906108c SS |
19024 | } |
19025 | ||
19026 | /* memory allocation interface */ | |
19027 | ||
c906108c | 19028 | static struct dwarf_block * |
7b5a2f43 | 19029 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
19030 | { |
19031 | struct dwarf_block *blk; | |
19032 | ||
19033 | blk = (struct dwarf_block *) | |
7b5a2f43 | 19034 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
19035 | return (blk); |
19036 | } | |
19037 | ||
c906108c | 19038 | static struct die_info * |
b60c80d6 | 19039 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
19040 | { |
19041 | struct die_info *die; | |
b60c80d6 DJ |
19042 | size_t size = sizeof (struct die_info); |
19043 | ||
19044 | if (num_attrs > 1) | |
19045 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 19046 | |
b60c80d6 | 19047 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
19048 | memset (die, 0, sizeof (struct die_info)); |
19049 | return (die); | |
19050 | } | |
2e276125 JB |
19051 | |
19052 | \f | |
19053 | /* Macro support. */ | |
19054 | ||
233d95b5 JK |
19055 | /* Return file name relative to the compilation directory of file number I in |
19056 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 19057 | responsible for freeing it. */ |
233d95b5 | 19058 | |
2e276125 | 19059 | static char * |
233d95b5 | 19060 | file_file_name (int file, struct line_header *lh) |
2e276125 | 19061 | { |
6a83a1e6 EZ |
19062 | /* Is the file number a valid index into the line header's file name |
19063 | table? Remember that file numbers start with one, not zero. */ | |
19064 | if (1 <= file && file <= lh->num_file_names) | |
19065 | { | |
19066 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 19067 | |
233d95b5 | 19068 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0) |
6a83a1e6 | 19069 | return xstrdup (fe->name); |
233d95b5 JK |
19070 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
19071 | fe->name, NULL); | |
6a83a1e6 | 19072 | } |
2e276125 JB |
19073 | else |
19074 | { | |
6a83a1e6 EZ |
19075 | /* The compiler produced a bogus file number. We can at least |
19076 | record the macro definitions made in the file, even if we | |
19077 | won't be able to find the file by name. */ | |
19078 | char fake_name[80]; | |
9a619af0 | 19079 | |
8c042590 PM |
19080 | xsnprintf (fake_name, sizeof (fake_name), |
19081 | "<bad macro file number %d>", file); | |
2e276125 | 19082 | |
6e70227d | 19083 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
19084 | _("bad file number in macro information (%d)"), |
19085 | file); | |
2e276125 | 19086 | |
6a83a1e6 | 19087 | return xstrdup (fake_name); |
2e276125 JB |
19088 | } |
19089 | } | |
19090 | ||
233d95b5 JK |
19091 | /* Return the full name of file number I in *LH's file name table. |
19092 | Use COMP_DIR as the name of the current directory of the | |
19093 | compilation. The result is allocated using xmalloc; the caller is | |
19094 | responsible for freeing it. */ | |
19095 | static char * | |
19096 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
19097 | { | |
19098 | /* Is the file number a valid index into the line header's file name | |
19099 | table? Remember that file numbers start with one, not zero. */ | |
19100 | if (1 <= file && file <= lh->num_file_names) | |
19101 | { | |
19102 | char *relative = file_file_name (file, lh); | |
19103 | ||
19104 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
19105 | return relative; | |
19106 | return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL); | |
19107 | } | |
19108 | else | |
19109 | return file_file_name (file, lh); | |
19110 | } | |
19111 | ||
2e276125 JB |
19112 | |
19113 | static struct macro_source_file * | |
19114 | macro_start_file (int file, int line, | |
19115 | struct macro_source_file *current_file, | |
19116 | const char *comp_dir, | |
19117 | struct line_header *lh, struct objfile *objfile) | |
19118 | { | |
233d95b5 JK |
19119 | /* File name relative to the compilation directory of this source file. */ |
19120 | char *file_name = file_file_name (file, lh); | |
2e276125 | 19121 | |
2e276125 | 19122 | if (! current_file) |
abc9d0dc | 19123 | { |
fc474241 DE |
19124 | /* Note: We don't create a macro table for this compilation unit |
19125 | at all until we actually get a filename. */ | |
19126 | struct macro_table *macro_table = get_macro_table (objfile, comp_dir); | |
19127 | ||
abc9d0dc TT |
19128 | /* If we have no current file, then this must be the start_file |
19129 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
19130 | current_file = macro_set_main (macro_table, file_name); |
19131 | macro_define_special (macro_table); | |
abc9d0dc | 19132 | } |
2e276125 | 19133 | else |
233d95b5 | 19134 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 19135 | |
233d95b5 | 19136 | xfree (file_name); |
6e70227d | 19137 | |
2e276125 JB |
19138 | return current_file; |
19139 | } | |
19140 | ||
19141 | ||
19142 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
19143 | followed by a null byte. */ | |
19144 | static char * | |
19145 | copy_string (const char *buf, int len) | |
19146 | { | |
19147 | char *s = xmalloc (len + 1); | |
9a619af0 | 19148 | |
2e276125 JB |
19149 | memcpy (s, buf, len); |
19150 | s[len] = '\0'; | |
2e276125 JB |
19151 | return s; |
19152 | } | |
19153 | ||
19154 | ||
19155 | static const char * | |
19156 | consume_improper_spaces (const char *p, const char *body) | |
19157 | { | |
19158 | if (*p == ' ') | |
19159 | { | |
4d3c2250 | 19160 | complaint (&symfile_complaints, |
3e43a32a MS |
19161 | _("macro definition contains spaces " |
19162 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 19163 | body); |
2e276125 JB |
19164 | |
19165 | while (*p == ' ') | |
19166 | p++; | |
19167 | } | |
19168 | ||
19169 | return p; | |
19170 | } | |
19171 | ||
19172 | ||
19173 | static void | |
19174 | parse_macro_definition (struct macro_source_file *file, int line, | |
19175 | const char *body) | |
19176 | { | |
19177 | const char *p; | |
19178 | ||
19179 | /* The body string takes one of two forms. For object-like macro | |
19180 | definitions, it should be: | |
19181 | ||
19182 | <macro name> " " <definition> | |
19183 | ||
19184 | For function-like macro definitions, it should be: | |
19185 | ||
19186 | <macro name> "() " <definition> | |
19187 | or | |
19188 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
19189 | ||
19190 | Spaces may appear only where explicitly indicated, and in the | |
19191 | <definition>. | |
19192 | ||
19193 | The Dwarf 2 spec says that an object-like macro's name is always | |
19194 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 19195 | the space when the macro's definition is the empty string. |
2e276125 JB |
19196 | |
19197 | The Dwarf 2 spec says that there should be no spaces between the | |
19198 | formal arguments in a function-like macro's formal argument list, | |
19199 | but versions of GCC around March 2002 include spaces after the | |
19200 | commas. */ | |
19201 | ||
19202 | ||
19203 | /* Find the extent of the macro name. The macro name is terminated | |
19204 | by either a space or null character (for an object-like macro) or | |
19205 | an opening paren (for a function-like macro). */ | |
19206 | for (p = body; *p; p++) | |
19207 | if (*p == ' ' || *p == '(') | |
19208 | break; | |
19209 | ||
19210 | if (*p == ' ' || *p == '\0') | |
19211 | { | |
19212 | /* It's an object-like macro. */ | |
19213 | int name_len = p - body; | |
19214 | char *name = copy_string (body, name_len); | |
19215 | const char *replacement; | |
19216 | ||
19217 | if (*p == ' ') | |
19218 | replacement = body + name_len + 1; | |
19219 | else | |
19220 | { | |
4d3c2250 | 19221 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
19222 | replacement = body + name_len; |
19223 | } | |
6e70227d | 19224 | |
2e276125 JB |
19225 | macro_define_object (file, line, name, replacement); |
19226 | ||
19227 | xfree (name); | |
19228 | } | |
19229 | else if (*p == '(') | |
19230 | { | |
19231 | /* It's a function-like macro. */ | |
19232 | char *name = copy_string (body, p - body); | |
19233 | int argc = 0; | |
19234 | int argv_size = 1; | |
19235 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
19236 | ||
19237 | p++; | |
19238 | ||
19239 | p = consume_improper_spaces (p, body); | |
19240 | ||
19241 | /* Parse the formal argument list. */ | |
19242 | while (*p && *p != ')') | |
19243 | { | |
19244 | /* Find the extent of the current argument name. */ | |
19245 | const char *arg_start = p; | |
19246 | ||
19247 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
19248 | p++; | |
19249 | ||
19250 | if (! *p || p == arg_start) | |
4d3c2250 | 19251 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
19252 | else |
19253 | { | |
19254 | /* Make sure argv has room for the new argument. */ | |
19255 | if (argc >= argv_size) | |
19256 | { | |
19257 | argv_size *= 2; | |
19258 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
19259 | } | |
19260 | ||
19261 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
19262 | } | |
19263 | ||
19264 | p = consume_improper_spaces (p, body); | |
19265 | ||
19266 | /* Consume the comma, if present. */ | |
19267 | if (*p == ',') | |
19268 | { | |
19269 | p++; | |
19270 | ||
19271 | p = consume_improper_spaces (p, body); | |
19272 | } | |
19273 | } | |
19274 | ||
19275 | if (*p == ')') | |
19276 | { | |
19277 | p++; | |
19278 | ||
19279 | if (*p == ' ') | |
19280 | /* Perfectly formed definition, no complaints. */ | |
19281 | macro_define_function (file, line, name, | |
6e70227d | 19282 | argc, (const char **) argv, |
2e276125 JB |
19283 | p + 1); |
19284 | else if (*p == '\0') | |
19285 | { | |
19286 | /* Complain, but do define it. */ | |
4d3c2250 | 19287 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 19288 | macro_define_function (file, line, name, |
6e70227d | 19289 | argc, (const char **) argv, |
2e276125 JB |
19290 | p); |
19291 | } | |
19292 | else | |
19293 | /* Just complain. */ | |
4d3c2250 | 19294 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
19295 | } |
19296 | else | |
19297 | /* Just complain. */ | |
4d3c2250 | 19298 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
19299 | |
19300 | xfree (name); | |
19301 | { | |
19302 | int i; | |
19303 | ||
19304 | for (i = 0; i < argc; i++) | |
19305 | xfree (argv[i]); | |
19306 | } | |
19307 | xfree (argv); | |
19308 | } | |
19309 | else | |
4d3c2250 | 19310 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
19311 | } |
19312 | ||
cf2c3c16 TT |
19313 | /* Skip some bytes from BYTES according to the form given in FORM. |
19314 | Returns the new pointer. */ | |
2e276125 | 19315 | |
d521ce57 TT |
19316 | static const gdb_byte * |
19317 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
19318 | enum dwarf_form form, |
19319 | unsigned int offset_size, | |
19320 | struct dwarf2_section_info *section) | |
2e276125 | 19321 | { |
cf2c3c16 | 19322 | unsigned int bytes_read; |
2e276125 | 19323 | |
cf2c3c16 | 19324 | switch (form) |
2e276125 | 19325 | { |
cf2c3c16 TT |
19326 | case DW_FORM_data1: |
19327 | case DW_FORM_flag: | |
19328 | ++bytes; | |
19329 | break; | |
19330 | ||
19331 | case DW_FORM_data2: | |
19332 | bytes += 2; | |
19333 | break; | |
19334 | ||
19335 | case DW_FORM_data4: | |
19336 | bytes += 4; | |
19337 | break; | |
19338 | ||
19339 | case DW_FORM_data8: | |
19340 | bytes += 8; | |
19341 | break; | |
19342 | ||
19343 | case DW_FORM_string: | |
19344 | read_direct_string (abfd, bytes, &bytes_read); | |
19345 | bytes += bytes_read; | |
19346 | break; | |
19347 | ||
19348 | case DW_FORM_sec_offset: | |
19349 | case DW_FORM_strp: | |
36586728 | 19350 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
19351 | bytes += offset_size; |
19352 | break; | |
19353 | ||
19354 | case DW_FORM_block: | |
19355 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
19356 | bytes += bytes_read; | |
19357 | break; | |
19358 | ||
19359 | case DW_FORM_block1: | |
19360 | bytes += 1 + read_1_byte (abfd, bytes); | |
19361 | break; | |
19362 | case DW_FORM_block2: | |
19363 | bytes += 2 + read_2_bytes (abfd, bytes); | |
19364 | break; | |
19365 | case DW_FORM_block4: | |
19366 | bytes += 4 + read_4_bytes (abfd, bytes); | |
19367 | break; | |
19368 | ||
19369 | case DW_FORM_sdata: | |
19370 | case DW_FORM_udata: | |
3019eac3 DE |
19371 | case DW_FORM_GNU_addr_index: |
19372 | case DW_FORM_GNU_str_index: | |
d521ce57 | 19373 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
19374 | if (bytes == NULL) |
19375 | { | |
19376 | dwarf2_section_buffer_overflow_complaint (section); | |
19377 | return NULL; | |
19378 | } | |
cf2c3c16 TT |
19379 | break; |
19380 | ||
19381 | default: | |
19382 | { | |
19383 | complain: | |
19384 | complaint (&symfile_complaints, | |
19385 | _("invalid form 0x%x in `%s'"), | |
a32a8923 | 19386 | form, get_section_name (section)); |
cf2c3c16 TT |
19387 | return NULL; |
19388 | } | |
2e276125 JB |
19389 | } |
19390 | ||
cf2c3c16 TT |
19391 | return bytes; |
19392 | } | |
757a13d0 | 19393 | |
cf2c3c16 TT |
19394 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
19395 | opcode. Returns an updated pointer to the macro data buffer; or, | |
19396 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 19397 | |
d521ce57 | 19398 | static const gdb_byte * |
cf2c3c16 | 19399 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
19400 | const gdb_byte **opcode_definitions, |
19401 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
19402 | bfd *abfd, |
19403 | unsigned int offset_size, | |
19404 | struct dwarf2_section_info *section) | |
19405 | { | |
19406 | unsigned int bytes_read, i; | |
19407 | unsigned long arg; | |
d521ce57 | 19408 | const gdb_byte *defn; |
2e276125 | 19409 | |
cf2c3c16 | 19410 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 19411 | { |
cf2c3c16 TT |
19412 | complaint (&symfile_complaints, |
19413 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
19414 | opcode); | |
19415 | return NULL; | |
19416 | } | |
2e276125 | 19417 | |
cf2c3c16 TT |
19418 | defn = opcode_definitions[opcode]; |
19419 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
19420 | defn += bytes_read; | |
2e276125 | 19421 | |
cf2c3c16 TT |
19422 | for (i = 0; i < arg; ++i) |
19423 | { | |
f664829e DE |
19424 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
19425 | section); | |
cf2c3c16 TT |
19426 | if (mac_ptr == NULL) |
19427 | { | |
19428 | /* skip_form_bytes already issued the complaint. */ | |
19429 | return NULL; | |
19430 | } | |
19431 | } | |
757a13d0 | 19432 | |
cf2c3c16 TT |
19433 | return mac_ptr; |
19434 | } | |
757a13d0 | 19435 | |
cf2c3c16 TT |
19436 | /* A helper function which parses the header of a macro section. |
19437 | If the macro section is the extended (for now called "GNU") type, | |
19438 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
19439 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 19440 | |
d521ce57 TT |
19441 | static const gdb_byte * |
19442 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 19443 | bfd *abfd, |
d521ce57 | 19444 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
19445 | unsigned int *offset_size, |
19446 | int section_is_gnu) | |
19447 | { | |
19448 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 19449 | |
cf2c3c16 TT |
19450 | if (section_is_gnu) |
19451 | { | |
19452 | unsigned int version, flags; | |
757a13d0 | 19453 | |
cf2c3c16 TT |
19454 | version = read_2_bytes (abfd, mac_ptr); |
19455 | if (version != 4) | |
19456 | { | |
19457 | complaint (&symfile_complaints, | |
19458 | _("unrecognized version `%d' in .debug_macro section"), | |
19459 | version); | |
19460 | return NULL; | |
19461 | } | |
19462 | mac_ptr += 2; | |
757a13d0 | 19463 | |
cf2c3c16 TT |
19464 | flags = read_1_byte (abfd, mac_ptr); |
19465 | ++mac_ptr; | |
19466 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 19467 | |
cf2c3c16 TT |
19468 | if ((flags & 2) != 0) |
19469 | /* We don't need the line table offset. */ | |
19470 | mac_ptr += *offset_size; | |
757a13d0 | 19471 | |
cf2c3c16 TT |
19472 | /* Vendor opcode descriptions. */ |
19473 | if ((flags & 4) != 0) | |
19474 | { | |
19475 | unsigned int i, count; | |
757a13d0 | 19476 | |
cf2c3c16 TT |
19477 | count = read_1_byte (abfd, mac_ptr); |
19478 | ++mac_ptr; | |
19479 | for (i = 0; i < count; ++i) | |
19480 | { | |
19481 | unsigned int opcode, bytes_read; | |
19482 | unsigned long arg; | |
19483 | ||
19484 | opcode = read_1_byte (abfd, mac_ptr); | |
19485 | ++mac_ptr; | |
19486 | opcode_definitions[opcode] = mac_ptr; | |
19487 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19488 | mac_ptr += bytes_read; | |
19489 | mac_ptr += arg; | |
19490 | } | |
757a13d0 | 19491 | } |
cf2c3c16 | 19492 | } |
757a13d0 | 19493 | |
cf2c3c16 TT |
19494 | return mac_ptr; |
19495 | } | |
757a13d0 | 19496 | |
cf2c3c16 | 19497 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 19498 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
19499 | |
19500 | static void | |
d521ce57 TT |
19501 | dwarf_decode_macro_bytes (bfd *abfd, |
19502 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 19503 | struct macro_source_file *current_file, |
15d034d0 | 19504 | struct line_header *lh, const char *comp_dir, |
cf2c3c16 | 19505 | struct dwarf2_section_info *section, |
36586728 | 19506 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 19507 | unsigned int offset_size, |
8fc3fc34 TT |
19508 | struct objfile *objfile, |
19509 | htab_t include_hash) | |
cf2c3c16 TT |
19510 | { |
19511 | enum dwarf_macro_record_type macinfo_type; | |
19512 | int at_commandline; | |
d521ce57 | 19513 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 19514 | |
cf2c3c16 TT |
19515 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
19516 | &offset_size, section_is_gnu); | |
19517 | if (mac_ptr == NULL) | |
19518 | { | |
19519 | /* We already issued a complaint. */ | |
19520 | return; | |
19521 | } | |
757a13d0 JK |
19522 | |
19523 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
19524 | GDB is still reading the definitions from command line. First | |
19525 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
19526 | to create CURRENT_FILE for the main source holding also the command line | |
19527 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
19528 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
19529 | ||
19530 | at_commandline = 1; | |
19531 | ||
19532 | do | |
19533 | { | |
19534 | /* Do we at least have room for a macinfo type byte? */ | |
19535 | if (mac_ptr >= mac_end) | |
19536 | { | |
f664829e | 19537 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
19538 | break; |
19539 | } | |
19540 | ||
19541 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
19542 | mac_ptr++; | |
19543 | ||
cf2c3c16 TT |
19544 | /* Note that we rely on the fact that the corresponding GNU and |
19545 | DWARF constants are the same. */ | |
757a13d0 JK |
19546 | switch (macinfo_type) |
19547 | { | |
19548 | /* A zero macinfo type indicates the end of the macro | |
19549 | information. */ | |
19550 | case 0: | |
19551 | break; | |
2e276125 | 19552 | |
cf2c3c16 TT |
19553 | case DW_MACRO_GNU_define: |
19554 | case DW_MACRO_GNU_undef: | |
19555 | case DW_MACRO_GNU_define_indirect: | |
19556 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
19557 | case DW_MACRO_GNU_define_indirect_alt: |
19558 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 19559 | { |
891d2f0b | 19560 | unsigned int bytes_read; |
2e276125 | 19561 | int line; |
d521ce57 | 19562 | const char *body; |
cf2c3c16 | 19563 | int is_define; |
2e276125 | 19564 | |
cf2c3c16 TT |
19565 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
19566 | mac_ptr += bytes_read; | |
19567 | ||
19568 | if (macinfo_type == DW_MACRO_GNU_define | |
19569 | || macinfo_type == DW_MACRO_GNU_undef) | |
19570 | { | |
19571 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
19572 | mac_ptr += bytes_read; | |
19573 | } | |
19574 | else | |
19575 | { | |
19576 | LONGEST str_offset; | |
19577 | ||
19578 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
19579 | mac_ptr += offset_size; | |
2e276125 | 19580 | |
36586728 | 19581 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
19582 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
19583 | || section_is_dwz) | |
36586728 TT |
19584 | { |
19585 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
19586 | ||
19587 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
19588 | } | |
19589 | else | |
19590 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
19591 | } |
19592 | ||
19593 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
19594 | || macinfo_type == DW_MACRO_GNU_define_indirect |
19595 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 19596 | if (! current_file) |
757a13d0 JK |
19597 | { |
19598 | /* DWARF violation as no main source is present. */ | |
19599 | complaint (&symfile_complaints, | |
19600 | _("debug info with no main source gives macro %s " | |
19601 | "on line %d: %s"), | |
cf2c3c16 TT |
19602 | is_define ? _("definition") : _("undefinition"), |
19603 | line, body); | |
757a13d0 JK |
19604 | break; |
19605 | } | |
3e43a32a MS |
19606 | if ((line == 0 && !at_commandline) |
19607 | || (line != 0 && at_commandline)) | |
4d3c2250 | 19608 | complaint (&symfile_complaints, |
757a13d0 JK |
19609 | _("debug info gives %s macro %s with %s line %d: %s"), |
19610 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 19611 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
19612 | line == 0 ? _("zero") : _("non-zero"), line, body); |
19613 | ||
cf2c3c16 | 19614 | if (is_define) |
757a13d0 | 19615 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
19616 | else |
19617 | { | |
19618 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
19619 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
19620 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
19621 | macro_undef (current_file, line, body); |
19622 | } | |
2e276125 JB |
19623 | } |
19624 | break; | |
19625 | ||
cf2c3c16 | 19626 | case DW_MACRO_GNU_start_file: |
2e276125 | 19627 | { |
891d2f0b | 19628 | unsigned int bytes_read; |
2e276125 JB |
19629 | int line, file; |
19630 | ||
19631 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19632 | mac_ptr += bytes_read; | |
19633 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19634 | mac_ptr += bytes_read; | |
19635 | ||
3e43a32a MS |
19636 | if ((line == 0 && !at_commandline) |
19637 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
19638 | complaint (&symfile_complaints, |
19639 | _("debug info gives source %d included " | |
19640 | "from %s at %s line %d"), | |
19641 | file, at_commandline ? _("command-line") : _("file"), | |
19642 | line == 0 ? _("zero") : _("non-zero"), line); | |
19643 | ||
19644 | if (at_commandline) | |
19645 | { | |
cf2c3c16 TT |
19646 | /* This DW_MACRO_GNU_start_file was executed in the |
19647 | pass one. */ | |
757a13d0 JK |
19648 | at_commandline = 0; |
19649 | } | |
19650 | else | |
19651 | current_file = macro_start_file (file, line, | |
19652 | current_file, comp_dir, | |
cf2c3c16 | 19653 | lh, objfile); |
2e276125 JB |
19654 | } |
19655 | break; | |
19656 | ||
cf2c3c16 | 19657 | case DW_MACRO_GNU_end_file: |
2e276125 | 19658 | if (! current_file) |
4d3c2250 | 19659 | complaint (&symfile_complaints, |
3e43a32a MS |
19660 | _("macro debug info has an unmatched " |
19661 | "`close_file' directive")); | |
2e276125 JB |
19662 | else |
19663 | { | |
19664 | current_file = current_file->included_by; | |
19665 | if (! current_file) | |
19666 | { | |
cf2c3c16 | 19667 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
19668 | |
19669 | /* GCC circa March 2002 doesn't produce the zero | |
19670 | type byte marking the end of the compilation | |
19671 | unit. Complain if it's not there, but exit no | |
19672 | matter what. */ | |
19673 | ||
19674 | /* Do we at least have room for a macinfo type byte? */ | |
19675 | if (mac_ptr >= mac_end) | |
19676 | { | |
f664829e | 19677 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
19678 | return; |
19679 | } | |
19680 | ||
19681 | /* We don't increment mac_ptr here, so this is just | |
19682 | a look-ahead. */ | |
19683 | next_type = read_1_byte (abfd, mac_ptr); | |
19684 | if (next_type != 0) | |
4d3c2250 | 19685 | complaint (&symfile_complaints, |
3e43a32a MS |
19686 | _("no terminating 0-type entry for " |
19687 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
19688 | |
19689 | return; | |
19690 | } | |
19691 | } | |
19692 | break; | |
19693 | ||
cf2c3c16 | 19694 | case DW_MACRO_GNU_transparent_include: |
36586728 | 19695 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
19696 | { |
19697 | LONGEST offset; | |
8fc3fc34 | 19698 | void **slot; |
a036ba48 TT |
19699 | bfd *include_bfd = abfd; |
19700 | struct dwarf2_section_info *include_section = section; | |
19701 | struct dwarf2_section_info alt_section; | |
d521ce57 | 19702 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 19703 | int is_dwz = section_is_dwz; |
d521ce57 | 19704 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
19705 | |
19706 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
19707 | mac_ptr += offset_size; | |
19708 | ||
a036ba48 TT |
19709 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
19710 | { | |
19711 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
19712 | ||
19713 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
19714 | &dwz->macro); | |
19715 | ||
a036ba48 | 19716 | include_section = &dwz->macro; |
a32a8923 | 19717 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
19718 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
19719 | is_dwz = 1; | |
19720 | } | |
19721 | ||
19722 | new_mac_ptr = include_section->buffer + offset; | |
19723 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
19724 | ||
8fc3fc34 TT |
19725 | if (*slot != NULL) |
19726 | { | |
19727 | /* This has actually happened; see | |
19728 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
19729 | complaint (&symfile_complaints, | |
19730 | _("recursive DW_MACRO_GNU_transparent_include in " | |
19731 | ".debug_macro section")); | |
19732 | } | |
19733 | else | |
19734 | { | |
d521ce57 | 19735 | *slot = (void *) new_mac_ptr; |
36586728 | 19736 | |
a036ba48 | 19737 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 19738 | include_mac_end, current_file, |
8fc3fc34 | 19739 | lh, comp_dir, |
36586728 | 19740 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
19741 | offset_size, objfile, include_hash); |
19742 | ||
d521ce57 | 19743 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 19744 | } |
cf2c3c16 TT |
19745 | } |
19746 | break; | |
19747 | ||
2e276125 | 19748 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
19749 | if (!section_is_gnu) |
19750 | { | |
19751 | unsigned int bytes_read; | |
19752 | int constant; | |
2e276125 | 19753 | |
cf2c3c16 TT |
19754 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
19755 | mac_ptr += bytes_read; | |
19756 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19757 | mac_ptr += bytes_read; | |
2e276125 | 19758 | |
cf2c3c16 TT |
19759 | /* We don't recognize any vendor extensions. */ |
19760 | break; | |
19761 | } | |
19762 | /* FALLTHROUGH */ | |
19763 | ||
19764 | default: | |
19765 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 19766 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
19767 | section); |
19768 | if (mac_ptr == NULL) | |
19769 | return; | |
19770 | break; | |
2e276125 | 19771 | } |
757a13d0 | 19772 | } while (macinfo_type != 0); |
2e276125 | 19773 | } |
8e19ed76 | 19774 | |
cf2c3c16 | 19775 | static void |
09262596 | 19776 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
15d034d0 | 19777 | const char *comp_dir, int section_is_gnu) |
cf2c3c16 | 19778 | { |
bb5ed363 | 19779 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
19780 | struct line_header *lh = cu->line_header; |
19781 | bfd *abfd; | |
d521ce57 | 19782 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
19783 | struct macro_source_file *current_file = 0; |
19784 | enum dwarf_macro_record_type macinfo_type; | |
19785 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 19786 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
19787 | struct cleanup *cleanup; |
19788 | htab_t include_hash; | |
19789 | void **slot; | |
09262596 DE |
19790 | struct dwarf2_section_info *section; |
19791 | const char *section_name; | |
19792 | ||
19793 | if (cu->dwo_unit != NULL) | |
19794 | { | |
19795 | if (section_is_gnu) | |
19796 | { | |
19797 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
19798 | section_name = ".debug_macro.dwo"; | |
19799 | } | |
19800 | else | |
19801 | { | |
19802 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
19803 | section_name = ".debug_macinfo.dwo"; | |
19804 | } | |
19805 | } | |
19806 | else | |
19807 | { | |
19808 | if (section_is_gnu) | |
19809 | { | |
19810 | section = &dwarf2_per_objfile->macro; | |
19811 | section_name = ".debug_macro"; | |
19812 | } | |
19813 | else | |
19814 | { | |
19815 | section = &dwarf2_per_objfile->macinfo; | |
19816 | section_name = ".debug_macinfo"; | |
19817 | } | |
19818 | } | |
cf2c3c16 | 19819 | |
bb5ed363 | 19820 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
19821 | if (section->buffer == NULL) |
19822 | { | |
fceca515 | 19823 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
19824 | return; |
19825 | } | |
a32a8923 | 19826 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
19827 | |
19828 | /* First pass: Find the name of the base filename. | |
19829 | This filename is needed in order to process all macros whose definition | |
19830 | (or undefinition) comes from the command line. These macros are defined | |
19831 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
19832 | associated to the base file. | |
19833 | ||
19834 | To determine the base file name, we scan the macro definitions until we | |
19835 | reach the first DW_MACINFO_start_file entry. We then initialize | |
19836 | CURRENT_FILE accordingly so that any macro definition found before the | |
19837 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
19838 | ||
19839 | mac_ptr = section->buffer + offset; | |
19840 | mac_end = section->buffer + section->size; | |
19841 | ||
19842 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
19843 | &offset_size, section_is_gnu); | |
19844 | if (mac_ptr == NULL) | |
19845 | { | |
19846 | /* We already issued a complaint. */ | |
19847 | return; | |
19848 | } | |
19849 | ||
19850 | do | |
19851 | { | |
19852 | /* Do we at least have room for a macinfo type byte? */ | |
19853 | if (mac_ptr >= mac_end) | |
19854 | { | |
19855 | /* Complaint is printed during the second pass as GDB will probably | |
19856 | stop the first pass earlier upon finding | |
19857 | DW_MACINFO_start_file. */ | |
19858 | break; | |
19859 | } | |
19860 | ||
19861 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
19862 | mac_ptr++; | |
19863 | ||
19864 | /* Note that we rely on the fact that the corresponding GNU and | |
19865 | DWARF constants are the same. */ | |
19866 | switch (macinfo_type) | |
19867 | { | |
19868 | /* A zero macinfo type indicates the end of the macro | |
19869 | information. */ | |
19870 | case 0: | |
19871 | break; | |
19872 | ||
19873 | case DW_MACRO_GNU_define: | |
19874 | case DW_MACRO_GNU_undef: | |
19875 | /* Only skip the data by MAC_PTR. */ | |
19876 | { | |
19877 | unsigned int bytes_read; | |
19878 | ||
19879 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19880 | mac_ptr += bytes_read; | |
19881 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19882 | mac_ptr += bytes_read; | |
19883 | } | |
19884 | break; | |
19885 | ||
19886 | case DW_MACRO_GNU_start_file: | |
19887 | { | |
19888 | unsigned int bytes_read; | |
19889 | int line, file; | |
19890 | ||
19891 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19892 | mac_ptr += bytes_read; | |
19893 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19894 | mac_ptr += bytes_read; | |
19895 | ||
19896 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 19897 | comp_dir, lh, objfile); |
cf2c3c16 TT |
19898 | } |
19899 | break; | |
19900 | ||
19901 | case DW_MACRO_GNU_end_file: | |
19902 | /* No data to skip by MAC_PTR. */ | |
19903 | break; | |
19904 | ||
19905 | case DW_MACRO_GNU_define_indirect: | |
19906 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
19907 | case DW_MACRO_GNU_define_indirect_alt: |
19908 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
19909 | { |
19910 | unsigned int bytes_read; | |
19911 | ||
19912 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19913 | mac_ptr += bytes_read; | |
19914 | mac_ptr += offset_size; | |
19915 | } | |
19916 | break; | |
19917 | ||
19918 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 19919 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
19920 | /* Note that, according to the spec, a transparent include |
19921 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
19922 | skip this opcode. */ | |
19923 | mac_ptr += offset_size; | |
19924 | break; | |
19925 | ||
19926 | case DW_MACINFO_vendor_ext: | |
19927 | /* Only skip the data by MAC_PTR. */ | |
19928 | if (!section_is_gnu) | |
19929 | { | |
19930 | unsigned int bytes_read; | |
19931 | ||
19932 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19933 | mac_ptr += bytes_read; | |
19934 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19935 | mac_ptr += bytes_read; | |
19936 | } | |
19937 | /* FALLTHROUGH */ | |
19938 | ||
19939 | default: | |
19940 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 19941 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
19942 | section); |
19943 | if (mac_ptr == NULL) | |
19944 | return; | |
19945 | break; | |
19946 | } | |
19947 | } while (macinfo_type != 0 && current_file == NULL); | |
19948 | ||
19949 | /* Second pass: Process all entries. | |
19950 | ||
19951 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
19952 | command-line macro definitions/undefinitions. This flag is unset when we | |
19953 | reach the first DW_MACINFO_start_file entry. */ | |
19954 | ||
8fc3fc34 TT |
19955 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
19956 | NULL, xcalloc, xfree); | |
19957 | cleanup = make_cleanup_htab_delete (include_hash); | |
19958 | mac_ptr = section->buffer + offset; | |
19959 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 19960 | *slot = (void *) mac_ptr; |
8fc3fc34 | 19961 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
36586728 TT |
19962 | current_file, lh, comp_dir, section, |
19963 | section_is_gnu, 0, | |
8fc3fc34 TT |
19964 | offset_size, objfile, include_hash); |
19965 | do_cleanups (cleanup); | |
cf2c3c16 TT |
19966 | } |
19967 | ||
8e19ed76 | 19968 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 19969 | if so return true else false. */ |
380bca97 | 19970 | |
8e19ed76 | 19971 | static int |
6e5a29e1 | 19972 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
19973 | { |
19974 | return (attr == NULL ? 0 : | |
19975 | attr->form == DW_FORM_block1 | |
19976 | || attr->form == DW_FORM_block2 | |
19977 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
19978 | || attr->form == DW_FORM_block |
19979 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 19980 | } |
4c2df51b | 19981 | |
c6a0999f JB |
19982 | /* Return non-zero if ATTR's value is a section offset --- classes |
19983 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
19984 | You may use DW_UNSND (attr) to retrieve such offsets. | |
19985 | ||
19986 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
19987 | may have a value that belongs to more than one of these classes; it | |
19988 | would be ambiguous if we did, because we use the same forms for all | |
19989 | of them. */ | |
380bca97 | 19990 | |
3690dd37 | 19991 | static int |
6e5a29e1 | 19992 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
19993 | { |
19994 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
19995 | || attr->form == DW_FORM_data8 |
19996 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
19997 | } |
19998 | ||
3690dd37 JB |
19999 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
20000 | zero otherwise. When this function returns true, you can apply | |
20001 | dwarf2_get_attr_constant_value to it. | |
20002 | ||
20003 | However, note that for some attributes you must check | |
20004 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
20005 | and DW_FORM_data8 are members of both the constant class, and of | |
20006 | the classes that contain offsets into other debug sections | |
20007 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
20008 | that, if an attribute's can be either a constant or one of the | |
20009 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
20010 | taken as section offsets, not constants. */ | |
380bca97 | 20011 | |
3690dd37 | 20012 | static int |
6e5a29e1 | 20013 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
20014 | { |
20015 | switch (attr->form) | |
20016 | { | |
20017 | case DW_FORM_sdata: | |
20018 | case DW_FORM_udata: | |
20019 | case DW_FORM_data1: | |
20020 | case DW_FORM_data2: | |
20021 | case DW_FORM_data4: | |
20022 | case DW_FORM_data8: | |
20023 | return 1; | |
20024 | default: | |
20025 | return 0; | |
20026 | } | |
20027 | } | |
20028 | ||
7771576e SA |
20029 | |
20030 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
20031 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
20032 | ||
20033 | static int | |
6e5a29e1 | 20034 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
20035 | { |
20036 | switch (attr->form) | |
20037 | { | |
20038 | case DW_FORM_ref_addr: | |
20039 | case DW_FORM_ref1: | |
20040 | case DW_FORM_ref2: | |
20041 | case DW_FORM_ref4: | |
20042 | case DW_FORM_ref8: | |
20043 | case DW_FORM_ref_udata: | |
20044 | case DW_FORM_GNU_ref_alt: | |
20045 | return 1; | |
20046 | default: | |
20047 | return 0; | |
20048 | } | |
20049 | } | |
20050 | ||
3019eac3 DE |
20051 | /* Return the .debug_loc section to use for CU. |
20052 | For DWO files use .debug_loc.dwo. */ | |
20053 | ||
20054 | static struct dwarf2_section_info * | |
20055 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
20056 | { | |
20057 | if (cu->dwo_unit) | |
20058 | return &cu->dwo_unit->dwo_file->sections.loc; | |
20059 | return &dwarf2_per_objfile->loc; | |
20060 | } | |
20061 | ||
8cf6f0b1 TT |
20062 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
20063 | ||
20064 | static void | |
20065 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
20066 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 20067 | const struct attribute *attr) |
8cf6f0b1 | 20068 | { |
3019eac3 DE |
20069 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
20070 | ||
20071 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
20072 | |
20073 | baton->per_cu = cu->per_cu; | |
20074 | gdb_assert (baton->per_cu); | |
20075 | /* We don't know how long the location list is, but make sure we | |
20076 | don't run off the edge of the section. */ | |
3019eac3 DE |
20077 | baton->size = section->size - DW_UNSND (attr); |
20078 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 20079 | baton->base_address = cu->base_address; |
f664829e | 20080 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
20081 | } |
20082 | ||
4c2df51b | 20083 | static void |
ff39bb5e | 20084 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 20085 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 20086 | { |
bb5ed363 | 20087 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 20088 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 20089 | |
3690dd37 | 20090 | if (attr_form_is_section_offset (attr) |
3019eac3 | 20091 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
20092 | the section. If so, fall through to the complaint in the |
20093 | other branch. */ | |
3019eac3 | 20094 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 20095 | { |
0d53c4c4 | 20096 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 20097 | |
bb5ed363 | 20098 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 20099 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 20100 | |
8cf6f0b1 | 20101 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 20102 | |
d00adf39 | 20103 | if (cu->base_known == 0) |
0d53c4c4 | 20104 | complaint (&symfile_complaints, |
3e43a32a MS |
20105 | _("Location list used without " |
20106 | "specifying the CU base address.")); | |
4c2df51b | 20107 | |
f1e6e072 TT |
20108 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
20109 | ? dwarf2_loclist_block_index | |
20110 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
20111 | SYMBOL_LOCATION_BATON (sym) = baton; |
20112 | } | |
20113 | else | |
20114 | { | |
20115 | struct dwarf2_locexpr_baton *baton; | |
20116 | ||
bb5ed363 | 20117 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 20118 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
20119 | baton->per_cu = cu->per_cu; |
20120 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
20121 | |
20122 | if (attr_form_is_block (attr)) | |
20123 | { | |
20124 | /* Note that we're just copying the block's data pointer | |
20125 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
20126 | info_buffer for SYM's objfile; right now we never release |
20127 | that buffer, but when we do clean up properly this may | |
20128 | need to change. */ | |
0d53c4c4 DJ |
20129 | baton->size = DW_BLOCK (attr)->size; |
20130 | baton->data = DW_BLOCK (attr)->data; | |
20131 | } | |
20132 | else | |
20133 | { | |
20134 | dwarf2_invalid_attrib_class_complaint ("location description", | |
20135 | SYMBOL_NATURAL_NAME (sym)); | |
20136 | baton->size = 0; | |
0d53c4c4 | 20137 | } |
6e70227d | 20138 | |
f1e6e072 TT |
20139 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
20140 | ? dwarf2_locexpr_block_index | |
20141 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
20142 | SYMBOL_LOCATION_BATON (sym) = baton; |
20143 | } | |
4c2df51b | 20144 | } |
6502dd73 | 20145 | |
9aa1f1e3 TT |
20146 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
20147 | came from a separate debuginfo file, then the master objfile is | |
20148 | returned. */ | |
ae0d2f24 UW |
20149 | |
20150 | struct objfile * | |
20151 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
20152 | { | |
9291a0cd | 20153 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
20154 | |
20155 | /* Return the master objfile, so that we can report and look up the | |
20156 | correct file containing this variable. */ | |
20157 | if (objfile->separate_debug_objfile_backlink) | |
20158 | objfile = objfile->separate_debug_objfile_backlink; | |
20159 | ||
20160 | return objfile; | |
20161 | } | |
20162 | ||
96408a79 SA |
20163 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
20164 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
20165 | CU_HEADERP first. */ | |
20166 | ||
20167 | static const struct comp_unit_head * | |
20168 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
20169 | struct dwarf2_per_cu_data *per_cu) | |
20170 | { | |
d521ce57 | 20171 | const gdb_byte *info_ptr; |
96408a79 SA |
20172 | |
20173 | if (per_cu->cu) | |
20174 | return &per_cu->cu->header; | |
20175 | ||
8a0459fd | 20176 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
20177 | |
20178 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 20179 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
20180 | |
20181 | return cu_headerp; | |
20182 | } | |
20183 | ||
ae0d2f24 UW |
20184 | /* Return the address size given in the compilation unit header for CU. */ |
20185 | ||
98714339 | 20186 | int |
ae0d2f24 UW |
20187 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
20188 | { | |
96408a79 SA |
20189 | struct comp_unit_head cu_header_local; |
20190 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 20191 | |
96408a79 SA |
20192 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
20193 | ||
20194 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
20195 | } |
20196 | ||
9eae7c52 TT |
20197 | /* Return the offset size given in the compilation unit header for CU. */ |
20198 | ||
20199 | int | |
20200 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
20201 | { | |
96408a79 SA |
20202 | struct comp_unit_head cu_header_local; |
20203 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 20204 | |
96408a79 SA |
20205 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
20206 | ||
20207 | return cu_headerp->offset_size; | |
20208 | } | |
20209 | ||
20210 | /* See its dwarf2loc.h declaration. */ | |
20211 | ||
20212 | int | |
20213 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
20214 | { | |
20215 | struct comp_unit_head cu_header_local; | |
20216 | const struct comp_unit_head *cu_headerp; | |
20217 | ||
20218 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
20219 | ||
20220 | if (cu_headerp->version == 2) | |
20221 | return cu_headerp->addr_size; | |
20222 | else | |
20223 | return cu_headerp->offset_size; | |
181cebd4 JK |
20224 | } |
20225 | ||
9aa1f1e3 TT |
20226 | /* Return the text offset of the CU. The returned offset comes from |
20227 | this CU's objfile. If this objfile came from a separate debuginfo | |
20228 | file, then the offset may be different from the corresponding | |
20229 | offset in the parent objfile. */ | |
20230 | ||
20231 | CORE_ADDR | |
20232 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
20233 | { | |
bb3fa9d0 | 20234 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
20235 | |
20236 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
20237 | } | |
20238 | ||
348e048f DE |
20239 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
20240 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
20241 | |
20242 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 20243 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 20244 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
20245 | struct objfile *objfile) |
20246 | { | |
20247 | struct dwarf2_per_cu_data *this_cu; | |
20248 | int low, high; | |
36586728 | 20249 | const sect_offset *cu_off; |
ae038cb0 | 20250 | |
ae038cb0 DJ |
20251 | low = 0; |
20252 | high = dwarf2_per_objfile->n_comp_units - 1; | |
20253 | while (high > low) | |
20254 | { | |
36586728 | 20255 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 20256 | int mid = low + (high - low) / 2; |
9a619af0 | 20257 | |
36586728 TT |
20258 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
20259 | cu_off = &mid_cu->offset; | |
20260 | if (mid_cu->is_dwz > offset_in_dwz | |
20261 | || (mid_cu->is_dwz == offset_in_dwz | |
20262 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
20263 | high = mid; |
20264 | else | |
20265 | low = mid + 1; | |
20266 | } | |
20267 | gdb_assert (low == high); | |
36586728 TT |
20268 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
20269 | cu_off = &this_cu->offset; | |
20270 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 20271 | { |
36586728 | 20272 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
20273 | error (_("Dwarf Error: could not find partial DIE containing " |
20274 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 20275 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 20276 | |
b64f50a1 JK |
20277 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
20278 | <= offset.sect_off); | |
ae038cb0 DJ |
20279 | return dwarf2_per_objfile->all_comp_units[low-1]; |
20280 | } | |
20281 | else | |
20282 | { | |
20283 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
20284 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
20285 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
20286 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
20287 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
20288 | return this_cu; |
20289 | } | |
20290 | } | |
20291 | ||
23745b47 | 20292 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 20293 | |
9816fde3 | 20294 | static void |
23745b47 | 20295 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 20296 | { |
9816fde3 | 20297 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
20298 | per_cu->cu = cu; |
20299 | cu->per_cu = per_cu; | |
20300 | cu->objfile = per_cu->objfile; | |
93311388 | 20301 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
20302 | } |
20303 | ||
20304 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
20305 | ||
20306 | static void | |
95554aad TT |
20307 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
20308 | enum language pretend_language) | |
9816fde3 JK |
20309 | { |
20310 | struct attribute *attr; | |
20311 | ||
20312 | /* Set the language we're debugging. */ | |
20313 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
20314 | if (attr) | |
20315 | set_cu_language (DW_UNSND (attr), cu); | |
20316 | else | |
9cded63f | 20317 | { |
95554aad | 20318 | cu->language = pretend_language; |
9cded63f TT |
20319 | cu->language_defn = language_def (cu->language); |
20320 | } | |
dee91e82 DE |
20321 | |
20322 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
20323 | if (attr) | |
20324 | cu->producer = DW_STRING (attr); | |
93311388 DE |
20325 | } |
20326 | ||
ae038cb0 DJ |
20327 | /* Release one cached compilation unit, CU. We unlink it from the tree |
20328 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
20329 | the caller is responsible for that. |
20330 | NOTE: DATA is a void * because this function is also used as a | |
20331 | cleanup routine. */ | |
ae038cb0 DJ |
20332 | |
20333 | static void | |
68dc6402 | 20334 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
20335 | { |
20336 | struct dwarf2_cu *cu = data; | |
20337 | ||
23745b47 DE |
20338 | gdb_assert (cu->per_cu != NULL); |
20339 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
20340 | cu->per_cu = NULL; |
20341 | ||
20342 | obstack_free (&cu->comp_unit_obstack, NULL); | |
20343 | ||
20344 | xfree (cu); | |
20345 | } | |
20346 | ||
72bf9492 | 20347 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 20348 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 20349 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
20350 | |
20351 | static void | |
20352 | free_stack_comp_unit (void *data) | |
20353 | { | |
20354 | struct dwarf2_cu *cu = data; | |
20355 | ||
23745b47 DE |
20356 | gdb_assert (cu->per_cu != NULL); |
20357 | cu->per_cu->cu = NULL; | |
20358 | cu->per_cu = NULL; | |
20359 | ||
72bf9492 DJ |
20360 | obstack_free (&cu->comp_unit_obstack, NULL); |
20361 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
20362 | } |
20363 | ||
20364 | /* Free all cached compilation units. */ | |
20365 | ||
20366 | static void | |
20367 | free_cached_comp_units (void *data) | |
20368 | { | |
20369 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
20370 | ||
20371 | per_cu = dwarf2_per_objfile->read_in_chain; | |
20372 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
20373 | while (per_cu != NULL) | |
20374 | { | |
20375 | struct dwarf2_per_cu_data *next_cu; | |
20376 | ||
20377 | next_cu = per_cu->cu->read_in_chain; | |
20378 | ||
68dc6402 | 20379 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
20380 | *last_chain = next_cu; |
20381 | ||
20382 | per_cu = next_cu; | |
20383 | } | |
20384 | } | |
20385 | ||
20386 | /* Increase the age counter on each cached compilation unit, and free | |
20387 | any that are too old. */ | |
20388 | ||
20389 | static void | |
20390 | age_cached_comp_units (void) | |
20391 | { | |
20392 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
20393 | ||
20394 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
20395 | per_cu = dwarf2_per_objfile->read_in_chain; | |
20396 | while (per_cu != NULL) | |
20397 | { | |
20398 | per_cu->cu->last_used ++; | |
20399 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
20400 | dwarf2_mark (per_cu->cu); | |
20401 | per_cu = per_cu->cu->read_in_chain; | |
20402 | } | |
20403 | ||
20404 | per_cu = dwarf2_per_objfile->read_in_chain; | |
20405 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
20406 | while (per_cu != NULL) | |
20407 | { | |
20408 | struct dwarf2_per_cu_data *next_cu; | |
20409 | ||
20410 | next_cu = per_cu->cu->read_in_chain; | |
20411 | ||
20412 | if (!per_cu->cu->mark) | |
20413 | { | |
68dc6402 | 20414 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
20415 | *last_chain = next_cu; |
20416 | } | |
20417 | else | |
20418 | last_chain = &per_cu->cu->read_in_chain; | |
20419 | ||
20420 | per_cu = next_cu; | |
20421 | } | |
20422 | } | |
20423 | ||
20424 | /* Remove a single compilation unit from the cache. */ | |
20425 | ||
20426 | static void | |
dee91e82 | 20427 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
20428 | { |
20429 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
20430 | ||
20431 | per_cu = dwarf2_per_objfile->read_in_chain; | |
20432 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
20433 | while (per_cu != NULL) | |
20434 | { | |
20435 | struct dwarf2_per_cu_data *next_cu; | |
20436 | ||
20437 | next_cu = per_cu->cu->read_in_chain; | |
20438 | ||
dee91e82 | 20439 | if (per_cu == target_per_cu) |
ae038cb0 | 20440 | { |
68dc6402 | 20441 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 20442 | per_cu->cu = NULL; |
ae038cb0 DJ |
20443 | *last_chain = next_cu; |
20444 | break; | |
20445 | } | |
20446 | else | |
20447 | last_chain = &per_cu->cu->read_in_chain; | |
20448 | ||
20449 | per_cu = next_cu; | |
20450 | } | |
20451 | } | |
20452 | ||
fe3e1990 DJ |
20453 | /* Release all extra memory associated with OBJFILE. */ |
20454 | ||
20455 | void | |
20456 | dwarf2_free_objfile (struct objfile *objfile) | |
20457 | { | |
20458 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
20459 | ||
20460 | if (dwarf2_per_objfile == NULL) | |
20461 | return; | |
20462 | ||
20463 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
20464 | free_cached_comp_units (NULL); | |
20465 | ||
7b9f3c50 DE |
20466 | if (dwarf2_per_objfile->quick_file_names_table) |
20467 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 20468 | |
fe3e1990 DJ |
20469 | /* Everything else should be on the objfile obstack. */ |
20470 | } | |
20471 | ||
dee91e82 DE |
20472 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
20473 | We store these in a hash table separate from the DIEs, and preserve them | |
20474 | when the DIEs are flushed out of cache. | |
20475 | ||
20476 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 20477 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
20478 | or the type may come from a DWO file. Furthermore, while it's more logical |
20479 | to use per_cu->section+offset, with Fission the section with the data is in | |
20480 | the DWO file but we don't know that section at the point we need it. | |
20481 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
20482 | because we can enter the lookup routine, get_die_type_at_offset, from | |
20483 | outside this file, and thus won't necessarily have PER_CU->cu. | |
20484 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 20485 | |
dee91e82 | 20486 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 20487 | { |
dee91e82 | 20488 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 20489 | sect_offset offset; |
1c379e20 DJ |
20490 | struct type *type; |
20491 | }; | |
20492 | ||
dee91e82 | 20493 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
20494 | |
20495 | static hashval_t | |
dee91e82 | 20496 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 20497 | { |
dee91e82 | 20498 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 20499 | |
dee91e82 | 20500 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
20501 | } |
20502 | ||
dee91e82 | 20503 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
20504 | |
20505 | static int | |
dee91e82 | 20506 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 20507 | { |
dee91e82 DE |
20508 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
20509 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 20510 | |
dee91e82 DE |
20511 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
20512 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
20513 | } |
20514 | ||
20515 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
20516 | table if necessary. For convenience, return TYPE. |
20517 | ||
20518 | The DIEs reading must have careful ordering to: | |
20519 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
20520 | reading current DIE. | |
20521 | * Not trying to dereference contents of still incompletely read in types | |
20522 | while reading in other DIEs. | |
20523 | * Enable referencing still incompletely read in types just by a pointer to | |
20524 | the type without accessing its fields. | |
20525 | ||
20526 | Therefore caller should follow these rules: | |
20527 | * Try to fetch any prerequisite types we may need to build this DIE type | |
20528 | before building the type and calling set_die_type. | |
e71ec853 | 20529 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
20530 | possible before fetching more types to complete the current type. |
20531 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 20532 | |
f792889a | 20533 | static struct type * |
1c379e20 DJ |
20534 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
20535 | { | |
dee91e82 | 20536 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 20537 | struct objfile *objfile = cu->objfile; |
1c379e20 | 20538 | |
b4ba55a1 JB |
20539 | /* For Ada types, make sure that the gnat-specific data is always |
20540 | initialized (if not already set). There are a few types where | |
20541 | we should not be doing so, because the type-specific area is | |
20542 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
20543 | where the type-specific area is used to store the floatformat). | |
20544 | But this is not a problem, because the gnat-specific information | |
20545 | is actually not needed for these types. */ | |
20546 | if (need_gnat_info (cu) | |
20547 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
20548 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
20549 | && !HAVE_GNAT_AUX_INFO (type)) | |
20550 | INIT_GNAT_SPECIFIC (type); | |
20551 | ||
dee91e82 | 20552 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 20553 | { |
dee91e82 DE |
20554 | dwarf2_per_objfile->die_type_hash = |
20555 | htab_create_alloc_ex (127, | |
20556 | per_cu_offset_and_type_hash, | |
20557 | per_cu_offset_and_type_eq, | |
20558 | NULL, | |
20559 | &objfile->objfile_obstack, | |
20560 | hashtab_obstack_allocate, | |
20561 | dummy_obstack_deallocate); | |
f792889a | 20562 | } |
1c379e20 | 20563 | |
dee91e82 | 20564 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
20565 | ofs.offset = die->offset; |
20566 | ofs.type = type; | |
dee91e82 DE |
20567 | slot = (struct dwarf2_per_cu_offset_and_type **) |
20568 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
20569 | if (*slot) |
20570 | complaint (&symfile_complaints, | |
20571 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 20572 | die->offset.sect_off); |
673bfd45 | 20573 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 20574 | **slot = ofs; |
f792889a | 20575 | return type; |
1c379e20 DJ |
20576 | } |
20577 | ||
02142a6c DE |
20578 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
20579 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
20580 | |
20581 | static struct type * | |
b64f50a1 | 20582 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 20583 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 20584 | { |
dee91e82 | 20585 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 20586 | |
dee91e82 | 20587 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 20588 | return NULL; |
1c379e20 | 20589 | |
dee91e82 | 20590 | ofs.per_cu = per_cu; |
673bfd45 | 20591 | ofs.offset = offset; |
dee91e82 | 20592 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
20593 | if (slot) |
20594 | return slot->type; | |
20595 | else | |
20596 | return NULL; | |
20597 | } | |
20598 | ||
02142a6c | 20599 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
20600 | or return NULL if DIE does not have a saved type. */ |
20601 | ||
20602 | static struct type * | |
20603 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
20604 | { | |
20605 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
20606 | } | |
20607 | ||
10b3939b DJ |
20608 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
20609 | ||
20610 | static void | |
20611 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
20612 | struct dwarf2_per_cu_data *ref_per_cu) | |
20613 | { | |
20614 | void **slot; | |
20615 | ||
20616 | if (cu->dependencies == NULL) | |
20617 | cu->dependencies | |
20618 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
20619 | NULL, &cu->comp_unit_obstack, | |
20620 | hashtab_obstack_allocate, | |
20621 | dummy_obstack_deallocate); | |
20622 | ||
20623 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
20624 | if (*slot == NULL) | |
20625 | *slot = ref_per_cu; | |
20626 | } | |
1c379e20 | 20627 | |
f504f079 DE |
20628 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
20629 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
20630 | cache that we must keep because we are keeping CU. */ |
20631 | ||
10b3939b DJ |
20632 | static int |
20633 | dwarf2_mark_helper (void **slot, void *data) | |
20634 | { | |
20635 | struct dwarf2_per_cu_data *per_cu; | |
20636 | ||
20637 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
20638 | |
20639 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
20640 | reading of the chain. As such dependencies remain valid it is not much | |
20641 | useful to track and undo them during QUIT cleanups. */ | |
20642 | if (per_cu->cu == NULL) | |
20643 | return 1; | |
20644 | ||
10b3939b DJ |
20645 | if (per_cu->cu->mark) |
20646 | return 1; | |
20647 | per_cu->cu->mark = 1; | |
20648 | ||
20649 | if (per_cu->cu->dependencies != NULL) | |
20650 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
20651 | ||
20652 | return 1; | |
20653 | } | |
20654 | ||
f504f079 DE |
20655 | /* Set the mark field in CU and in every other compilation unit in the |
20656 | cache that we must keep because we are keeping CU. */ | |
20657 | ||
ae038cb0 DJ |
20658 | static void |
20659 | dwarf2_mark (struct dwarf2_cu *cu) | |
20660 | { | |
20661 | if (cu->mark) | |
20662 | return; | |
20663 | cu->mark = 1; | |
10b3939b DJ |
20664 | if (cu->dependencies != NULL) |
20665 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
20666 | } |
20667 | ||
20668 | static void | |
20669 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
20670 | { | |
20671 | while (per_cu) | |
20672 | { | |
20673 | per_cu->cu->mark = 0; | |
20674 | per_cu = per_cu->cu->read_in_chain; | |
20675 | } | |
72bf9492 DJ |
20676 | } |
20677 | ||
72bf9492 DJ |
20678 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
20679 | is its offset in .debug_info for this objfile. */ | |
20680 | ||
20681 | static hashval_t | |
20682 | partial_die_hash (const void *item) | |
20683 | { | |
20684 | const struct partial_die_info *part_die = item; | |
9a619af0 | 20685 | |
b64f50a1 | 20686 | return part_die->offset.sect_off; |
72bf9492 DJ |
20687 | } |
20688 | ||
20689 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
20690 | are equal if they have the same offset. */ | |
20691 | ||
20692 | static int | |
20693 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
20694 | { | |
20695 | const struct partial_die_info *part_die_lhs = item_lhs; | |
20696 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 20697 | |
b64f50a1 | 20698 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
20699 | } |
20700 | ||
ae038cb0 DJ |
20701 | static struct cmd_list_element *set_dwarf2_cmdlist; |
20702 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
20703 | ||
20704 | static void | |
20705 | set_dwarf2_cmd (char *args, int from_tty) | |
20706 | { | |
20707 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
20708 | } | |
20709 | ||
20710 | static void | |
20711 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 20712 | { |
ae038cb0 DJ |
20713 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
20714 | } | |
20715 | ||
4bf44c1c | 20716 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
20717 | |
20718 | static void | |
c1bd65d0 | 20719 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
20720 | { |
20721 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 20722 | int ix; |
8b70b953 | 20723 | |
626f2d1c TT |
20724 | /* Make sure we don't accidentally use dwarf2_per_objfile while |
20725 | cleaning up. */ | |
20726 | dwarf2_per_objfile = NULL; | |
20727 | ||
59b0c7c1 JB |
20728 | for (ix = 0; ix < data->n_comp_units; ++ix) |
20729 | VEC_free (dwarf2_per_cu_ptr, data->all_comp_units[ix]->imported_symtabs); | |
796a7ff8 | 20730 | |
59b0c7c1 | 20731 | for (ix = 0; ix < data->n_type_units; ++ix) |
796a7ff8 | 20732 | VEC_free (dwarf2_per_cu_ptr, |
59b0c7c1 JB |
20733 | data->all_type_units[ix]->per_cu.imported_symtabs); |
20734 | xfree (data->all_type_units); | |
95554aad | 20735 | |
8b70b953 | 20736 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
20737 | |
20738 | if (data->dwo_files) | |
20739 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
20740 | if (data->dwp_file) |
20741 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
20742 | |
20743 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
20744 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
20745 | } |
20746 | ||
20747 | \f | |
ae2de4f8 | 20748 | /* The "save gdb-index" command. */ |
9291a0cd TT |
20749 | |
20750 | /* The contents of the hash table we create when building the string | |
20751 | table. */ | |
20752 | struct strtab_entry | |
20753 | { | |
20754 | offset_type offset; | |
20755 | const char *str; | |
20756 | }; | |
20757 | ||
559a7a62 JK |
20758 | /* Hash function for a strtab_entry. |
20759 | ||
20760 | Function is used only during write_hash_table so no index format backward | |
20761 | compatibility is needed. */ | |
b89be57b | 20762 | |
9291a0cd TT |
20763 | static hashval_t |
20764 | hash_strtab_entry (const void *e) | |
20765 | { | |
20766 | const struct strtab_entry *entry = e; | |
559a7a62 | 20767 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
20768 | } |
20769 | ||
20770 | /* Equality function for a strtab_entry. */ | |
b89be57b | 20771 | |
9291a0cd TT |
20772 | static int |
20773 | eq_strtab_entry (const void *a, const void *b) | |
20774 | { | |
20775 | const struct strtab_entry *ea = a; | |
20776 | const struct strtab_entry *eb = b; | |
20777 | return !strcmp (ea->str, eb->str); | |
20778 | } | |
20779 | ||
20780 | /* Create a strtab_entry hash table. */ | |
b89be57b | 20781 | |
9291a0cd TT |
20782 | static htab_t |
20783 | create_strtab (void) | |
20784 | { | |
20785 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
20786 | xfree, xcalloc, xfree); | |
20787 | } | |
20788 | ||
20789 | /* Add a string to the constant pool. Return the string's offset in | |
20790 | host order. */ | |
b89be57b | 20791 | |
9291a0cd TT |
20792 | static offset_type |
20793 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
20794 | { | |
20795 | void **slot; | |
20796 | struct strtab_entry entry; | |
20797 | struct strtab_entry *result; | |
20798 | ||
20799 | entry.str = str; | |
20800 | slot = htab_find_slot (table, &entry, INSERT); | |
20801 | if (*slot) | |
20802 | result = *slot; | |
20803 | else | |
20804 | { | |
20805 | result = XNEW (struct strtab_entry); | |
20806 | result->offset = obstack_object_size (cpool); | |
20807 | result->str = str; | |
20808 | obstack_grow_str0 (cpool, str); | |
20809 | *slot = result; | |
20810 | } | |
20811 | return result->offset; | |
20812 | } | |
20813 | ||
20814 | /* An entry in the symbol table. */ | |
20815 | struct symtab_index_entry | |
20816 | { | |
20817 | /* The name of the symbol. */ | |
20818 | const char *name; | |
20819 | /* The offset of the name in the constant pool. */ | |
20820 | offset_type index_offset; | |
20821 | /* A sorted vector of the indices of all the CUs that hold an object | |
20822 | of this name. */ | |
20823 | VEC (offset_type) *cu_indices; | |
20824 | }; | |
20825 | ||
20826 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
20827 | struct mapped_symtab | |
20828 | { | |
20829 | offset_type n_elements; | |
20830 | offset_type size; | |
20831 | struct symtab_index_entry **data; | |
20832 | }; | |
20833 | ||
20834 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 20835 | |
9291a0cd TT |
20836 | static hashval_t |
20837 | hash_symtab_entry (const void *e) | |
20838 | { | |
20839 | const struct symtab_index_entry *entry = e; | |
20840 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
20841 | sizeof (offset_type) * VEC_length (offset_type, | |
20842 | entry->cu_indices), | |
20843 | 0); | |
20844 | } | |
20845 | ||
20846 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 20847 | |
9291a0cd TT |
20848 | static int |
20849 | eq_symtab_entry (const void *a, const void *b) | |
20850 | { | |
20851 | const struct symtab_index_entry *ea = a; | |
20852 | const struct symtab_index_entry *eb = b; | |
20853 | int len = VEC_length (offset_type, ea->cu_indices); | |
20854 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
20855 | return 0; | |
20856 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
20857 | VEC_address (offset_type, eb->cu_indices), | |
20858 | sizeof (offset_type) * len); | |
20859 | } | |
20860 | ||
20861 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 20862 | |
9291a0cd TT |
20863 | static void |
20864 | delete_symtab_entry (void *p) | |
20865 | { | |
20866 | struct symtab_index_entry *entry = p; | |
20867 | VEC_free (offset_type, entry->cu_indices); | |
20868 | xfree (entry); | |
20869 | } | |
20870 | ||
20871 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 20872 | |
9291a0cd | 20873 | static htab_t |
3876f04e | 20874 | create_symbol_hash_table (void) |
9291a0cd TT |
20875 | { |
20876 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
20877 | delete_symtab_entry, xcalloc, xfree); | |
20878 | } | |
20879 | ||
20880 | /* Create a new mapped symtab object. */ | |
b89be57b | 20881 | |
9291a0cd TT |
20882 | static struct mapped_symtab * |
20883 | create_mapped_symtab (void) | |
20884 | { | |
20885 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
20886 | symtab->n_elements = 0; | |
20887 | symtab->size = 1024; | |
20888 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
20889 | return symtab; | |
20890 | } | |
20891 | ||
20892 | /* Destroy a mapped_symtab. */ | |
b89be57b | 20893 | |
9291a0cd TT |
20894 | static void |
20895 | cleanup_mapped_symtab (void *p) | |
20896 | { | |
20897 | struct mapped_symtab *symtab = p; | |
20898 | /* The contents of the array are freed when the other hash table is | |
20899 | destroyed. */ | |
20900 | xfree (symtab->data); | |
20901 | xfree (symtab); | |
20902 | } | |
20903 | ||
20904 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
20905 | the slot. |
20906 | ||
20907 | Function is used only during write_hash_table so no index format backward | |
20908 | compatibility is needed. */ | |
b89be57b | 20909 | |
9291a0cd TT |
20910 | static struct symtab_index_entry ** |
20911 | find_slot (struct mapped_symtab *symtab, const char *name) | |
20912 | { | |
559a7a62 | 20913 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
20914 | |
20915 | index = hash & (symtab->size - 1); | |
20916 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
20917 | ||
20918 | for (;;) | |
20919 | { | |
20920 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
20921 | return &symtab->data[index]; | |
20922 | index = (index + step) & (symtab->size - 1); | |
20923 | } | |
20924 | } | |
20925 | ||
20926 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 20927 | |
9291a0cd TT |
20928 | static void |
20929 | hash_expand (struct mapped_symtab *symtab) | |
20930 | { | |
20931 | offset_type old_size = symtab->size; | |
20932 | offset_type i; | |
20933 | struct symtab_index_entry **old_entries = symtab->data; | |
20934 | ||
20935 | symtab->size *= 2; | |
20936 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
20937 | ||
20938 | for (i = 0; i < old_size; ++i) | |
20939 | { | |
20940 | if (old_entries[i]) | |
20941 | { | |
20942 | struct symtab_index_entry **slot = find_slot (symtab, | |
20943 | old_entries[i]->name); | |
20944 | *slot = old_entries[i]; | |
20945 | } | |
20946 | } | |
20947 | ||
20948 | xfree (old_entries); | |
20949 | } | |
20950 | ||
156942c7 DE |
20951 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
20952 | CU_INDEX is the index of the CU in which the symbol appears. | |
20953 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 20954 | |
9291a0cd TT |
20955 | static void |
20956 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 20957 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
20958 | offset_type cu_index) |
20959 | { | |
20960 | struct symtab_index_entry **slot; | |
156942c7 | 20961 | offset_type cu_index_and_attrs; |
9291a0cd TT |
20962 | |
20963 | ++symtab->n_elements; | |
20964 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
20965 | hash_expand (symtab); | |
20966 | ||
20967 | slot = find_slot (symtab, name); | |
20968 | if (!*slot) | |
20969 | { | |
20970 | *slot = XNEW (struct symtab_index_entry); | |
20971 | (*slot)->name = name; | |
156942c7 | 20972 | /* index_offset is set later. */ |
9291a0cd TT |
20973 | (*slot)->cu_indices = NULL; |
20974 | } | |
156942c7 DE |
20975 | |
20976 | cu_index_and_attrs = 0; | |
20977 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
20978 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
20979 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
20980 | ||
20981 | /* We don't want to record an index value twice as we want to avoid the | |
20982 | duplication. | |
20983 | We process all global symbols and then all static symbols | |
20984 | (which would allow us to avoid the duplication by only having to check | |
20985 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
20986 | To keep things simple we don't worry about the duplication here and | |
20987 | sort and uniqufy the list after we've processed all symbols. */ | |
20988 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
20989 | } | |
20990 | ||
20991 | /* qsort helper routine for uniquify_cu_indices. */ | |
20992 | ||
20993 | static int | |
20994 | offset_type_compare (const void *ap, const void *bp) | |
20995 | { | |
20996 | offset_type a = *(offset_type *) ap; | |
20997 | offset_type b = *(offset_type *) bp; | |
20998 | ||
20999 | return (a > b) - (b > a); | |
21000 | } | |
21001 | ||
21002 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
21003 | ||
21004 | static void | |
21005 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
21006 | { | |
21007 | int i; | |
21008 | ||
21009 | for (i = 0; i < symtab->size; ++i) | |
21010 | { | |
21011 | struct symtab_index_entry *entry = symtab->data[i]; | |
21012 | ||
21013 | if (entry | |
21014 | && entry->cu_indices != NULL) | |
21015 | { | |
21016 | unsigned int next_to_insert, next_to_check; | |
21017 | offset_type last_value; | |
21018 | ||
21019 | qsort (VEC_address (offset_type, entry->cu_indices), | |
21020 | VEC_length (offset_type, entry->cu_indices), | |
21021 | sizeof (offset_type), offset_type_compare); | |
21022 | ||
21023 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
21024 | next_to_insert = 1; | |
21025 | for (next_to_check = 1; | |
21026 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
21027 | ++next_to_check) | |
21028 | { | |
21029 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
21030 | != last_value) | |
21031 | { | |
21032 | last_value = VEC_index (offset_type, entry->cu_indices, | |
21033 | next_to_check); | |
21034 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
21035 | last_value); | |
21036 | ++next_to_insert; | |
21037 | } | |
21038 | } | |
21039 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
21040 | } | |
21041 | } | |
9291a0cd TT |
21042 | } |
21043 | ||
21044 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 21045 | |
9291a0cd | 21046 | static offset_type |
3876f04e | 21047 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
21048 | struct symtab_index_entry *entry) |
21049 | { | |
21050 | void **slot; | |
21051 | ||
3876f04e | 21052 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
21053 | if (!*slot) |
21054 | { | |
21055 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
21056 | offset_type val = MAYBE_SWAP (len); | |
21057 | offset_type iter; | |
21058 | int i; | |
21059 | ||
21060 | *slot = entry; | |
21061 | entry->index_offset = obstack_object_size (cpool); | |
21062 | ||
21063 | obstack_grow (cpool, &val, sizeof (val)); | |
21064 | for (i = 0; | |
21065 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
21066 | ++i) | |
21067 | { | |
21068 | val = MAYBE_SWAP (iter); | |
21069 | obstack_grow (cpool, &val, sizeof (val)); | |
21070 | } | |
21071 | } | |
21072 | else | |
21073 | { | |
21074 | struct symtab_index_entry *old_entry = *slot; | |
21075 | entry->index_offset = old_entry->index_offset; | |
21076 | entry = old_entry; | |
21077 | } | |
21078 | return entry->index_offset; | |
21079 | } | |
21080 | ||
21081 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
21082 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 21083 | |
9291a0cd TT |
21084 | static void |
21085 | write_hash_table (struct mapped_symtab *symtab, | |
21086 | struct obstack *output, struct obstack *cpool) | |
21087 | { | |
21088 | offset_type i; | |
3876f04e | 21089 | htab_t symbol_hash_table; |
9291a0cd TT |
21090 | htab_t str_table; |
21091 | ||
3876f04e | 21092 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 21093 | str_table = create_strtab (); |
3876f04e | 21094 | |
9291a0cd TT |
21095 | /* We add all the index vectors to the constant pool first, to |
21096 | ensure alignment is ok. */ | |
21097 | for (i = 0; i < symtab->size; ++i) | |
21098 | { | |
21099 | if (symtab->data[i]) | |
3876f04e | 21100 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
21101 | } |
21102 | ||
21103 | /* Now write out the hash table. */ | |
21104 | for (i = 0; i < symtab->size; ++i) | |
21105 | { | |
21106 | offset_type str_off, vec_off; | |
21107 | ||
21108 | if (symtab->data[i]) | |
21109 | { | |
21110 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
21111 | vec_off = symtab->data[i]->index_offset; | |
21112 | } | |
21113 | else | |
21114 | { | |
21115 | /* While 0 is a valid constant pool index, it is not valid | |
21116 | to have 0 for both offsets. */ | |
21117 | str_off = 0; | |
21118 | vec_off = 0; | |
21119 | } | |
21120 | ||
21121 | str_off = MAYBE_SWAP (str_off); | |
21122 | vec_off = MAYBE_SWAP (vec_off); | |
21123 | ||
21124 | obstack_grow (output, &str_off, sizeof (str_off)); | |
21125 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
21126 | } | |
21127 | ||
21128 | htab_delete (str_table); | |
3876f04e | 21129 | htab_delete (symbol_hash_table); |
9291a0cd TT |
21130 | } |
21131 | ||
0a5429f6 DE |
21132 | /* Struct to map psymtab to CU index in the index file. */ |
21133 | struct psymtab_cu_index_map | |
21134 | { | |
21135 | struct partial_symtab *psymtab; | |
21136 | unsigned int cu_index; | |
21137 | }; | |
21138 | ||
21139 | static hashval_t | |
21140 | hash_psymtab_cu_index (const void *item) | |
21141 | { | |
21142 | const struct psymtab_cu_index_map *map = item; | |
21143 | ||
21144 | return htab_hash_pointer (map->psymtab); | |
21145 | } | |
21146 | ||
21147 | static int | |
21148 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
21149 | { | |
21150 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
21151 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
21152 | ||
21153 | return lhs->psymtab == rhs->psymtab; | |
21154 | } | |
21155 | ||
21156 | /* Helper struct for building the address table. */ | |
21157 | struct addrmap_index_data | |
21158 | { | |
21159 | struct objfile *objfile; | |
21160 | struct obstack *addr_obstack; | |
21161 | htab_t cu_index_htab; | |
21162 | ||
21163 | /* Non-zero if the previous_* fields are valid. | |
21164 | We can't write an entry until we see the next entry (since it is only then | |
21165 | that we know the end of the entry). */ | |
21166 | int previous_valid; | |
21167 | /* Index of the CU in the table of all CUs in the index file. */ | |
21168 | unsigned int previous_cu_index; | |
0963b4bd | 21169 | /* Start address of the CU. */ |
0a5429f6 DE |
21170 | CORE_ADDR previous_cu_start; |
21171 | }; | |
21172 | ||
21173 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 21174 | |
9291a0cd | 21175 | static void |
0a5429f6 DE |
21176 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
21177 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 21178 | { |
0a5429f6 | 21179 | offset_type cu_index_to_write; |
948f8e3d | 21180 | gdb_byte addr[8]; |
9291a0cd TT |
21181 | CORE_ADDR baseaddr; |
21182 | ||
21183 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
21184 | ||
0a5429f6 DE |
21185 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
21186 | obstack_grow (obstack, addr, 8); | |
21187 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
21188 | obstack_grow (obstack, addr, 8); | |
21189 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
21190 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
21191 | } | |
21192 | ||
21193 | /* Worker function for traversing an addrmap to build the address table. */ | |
21194 | ||
21195 | static int | |
21196 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
21197 | { | |
21198 | struct addrmap_index_data *data = datap; | |
21199 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
21200 | |
21201 | if (data->previous_valid) | |
21202 | add_address_entry (data->objfile, data->addr_obstack, | |
21203 | data->previous_cu_start, start_addr, | |
21204 | data->previous_cu_index); | |
21205 | ||
21206 | data->previous_cu_start = start_addr; | |
21207 | if (pst != NULL) | |
21208 | { | |
21209 | struct psymtab_cu_index_map find_map, *map; | |
21210 | find_map.psymtab = pst; | |
21211 | map = htab_find (data->cu_index_htab, &find_map); | |
21212 | gdb_assert (map != NULL); | |
21213 | data->previous_cu_index = map->cu_index; | |
21214 | data->previous_valid = 1; | |
21215 | } | |
21216 | else | |
21217 | data->previous_valid = 0; | |
21218 | ||
21219 | return 0; | |
21220 | } | |
21221 | ||
21222 | /* Write OBJFILE's address map to OBSTACK. | |
21223 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
21224 | in the index file. */ | |
21225 | ||
21226 | static void | |
21227 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
21228 | htab_t cu_index_htab) | |
21229 | { | |
21230 | struct addrmap_index_data addrmap_index_data; | |
21231 | ||
21232 | /* When writing the address table, we have to cope with the fact that | |
21233 | the addrmap iterator only provides the start of a region; we have to | |
21234 | wait until the next invocation to get the start of the next region. */ | |
21235 | ||
21236 | addrmap_index_data.objfile = objfile; | |
21237 | addrmap_index_data.addr_obstack = obstack; | |
21238 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
21239 | addrmap_index_data.previous_valid = 0; | |
21240 | ||
21241 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
21242 | &addrmap_index_data); | |
21243 | ||
21244 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
21245 | is valid, but we should still handle it. | |
21246 | The end address is recorded as the start of the next region, but that | |
21247 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
21248 | anyway. */ | |
21249 | if (addrmap_index_data.previous_valid) | |
21250 | add_address_entry (objfile, obstack, | |
21251 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
21252 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
21253 | } |
21254 | ||
156942c7 DE |
21255 | /* Return the symbol kind of PSYM. */ |
21256 | ||
21257 | static gdb_index_symbol_kind | |
21258 | symbol_kind (struct partial_symbol *psym) | |
21259 | { | |
21260 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
21261 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
21262 | ||
21263 | switch (domain) | |
21264 | { | |
21265 | case VAR_DOMAIN: | |
21266 | switch (aclass) | |
21267 | { | |
21268 | case LOC_BLOCK: | |
21269 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
21270 | case LOC_TYPEDEF: | |
21271 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
21272 | case LOC_COMPUTED: | |
21273 | case LOC_CONST_BYTES: | |
21274 | case LOC_OPTIMIZED_OUT: | |
21275 | case LOC_STATIC: | |
21276 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
21277 | case LOC_CONST: | |
21278 | /* Note: It's currently impossible to recognize psyms as enum values | |
21279 | short of reading the type info. For now punt. */ | |
21280 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
21281 | default: | |
21282 | /* There are other LOC_FOO values that one might want to classify | |
21283 | as variables, but dwarf2read.c doesn't currently use them. */ | |
21284 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
21285 | } | |
21286 | case STRUCT_DOMAIN: | |
21287 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
21288 | default: | |
21289 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
21290 | } | |
21291 | } | |
21292 | ||
9291a0cd | 21293 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 21294 | |
9291a0cd TT |
21295 | static void |
21296 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 21297 | htab_t psyms_seen, |
9291a0cd TT |
21298 | struct partial_symbol **psymp, |
21299 | int count, | |
987d643c TT |
21300 | offset_type cu_index, |
21301 | int is_static) | |
9291a0cd TT |
21302 | { |
21303 | for (; count-- > 0; ++psymp) | |
21304 | { | |
156942c7 DE |
21305 | struct partial_symbol *psym = *psymp; |
21306 | void **slot; | |
987d643c | 21307 | |
156942c7 | 21308 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 21309 | error (_("Ada is not currently supported by the index")); |
987d643c | 21310 | |
987d643c | 21311 | /* Only add a given psymbol once. */ |
156942c7 | 21312 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
21313 | if (!*slot) |
21314 | { | |
156942c7 DE |
21315 | gdb_index_symbol_kind kind = symbol_kind (psym); |
21316 | ||
21317 | *slot = psym; | |
21318 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
21319 | is_static, kind, cu_index); | |
987d643c | 21320 | } |
9291a0cd TT |
21321 | } |
21322 | } | |
21323 | ||
21324 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
21325 | exception if there is an error. */ | |
b89be57b | 21326 | |
9291a0cd TT |
21327 | static void |
21328 | write_obstack (FILE *file, struct obstack *obstack) | |
21329 | { | |
21330 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
21331 | file) | |
21332 | != obstack_object_size (obstack)) | |
21333 | error (_("couldn't data write to file")); | |
21334 | } | |
21335 | ||
21336 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 21337 | |
9291a0cd TT |
21338 | static void |
21339 | unlink_if_set (void *p) | |
21340 | { | |
21341 | char **filename = p; | |
21342 | if (*filename) | |
21343 | unlink (*filename); | |
21344 | } | |
21345 | ||
1fd400ff TT |
21346 | /* A helper struct used when iterating over debug_types. */ |
21347 | struct signatured_type_index_data | |
21348 | { | |
21349 | struct objfile *objfile; | |
21350 | struct mapped_symtab *symtab; | |
21351 | struct obstack *types_list; | |
987d643c | 21352 | htab_t psyms_seen; |
1fd400ff TT |
21353 | int cu_index; |
21354 | }; | |
21355 | ||
21356 | /* A helper function that writes a single signatured_type to an | |
21357 | obstack. */ | |
b89be57b | 21358 | |
1fd400ff TT |
21359 | static int |
21360 | write_one_signatured_type (void **slot, void *d) | |
21361 | { | |
21362 | struct signatured_type_index_data *info = d; | |
21363 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
0186c6a7 | 21364 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
21365 | gdb_byte val[8]; |
21366 | ||
21367 | write_psymbols (info->symtab, | |
987d643c | 21368 | info->psyms_seen, |
3e43a32a MS |
21369 | info->objfile->global_psymbols.list |
21370 | + psymtab->globals_offset, | |
987d643c TT |
21371 | psymtab->n_global_syms, info->cu_index, |
21372 | 0); | |
1fd400ff | 21373 | write_psymbols (info->symtab, |
987d643c | 21374 | info->psyms_seen, |
3e43a32a MS |
21375 | info->objfile->static_psymbols.list |
21376 | + psymtab->statics_offset, | |
987d643c TT |
21377 | psymtab->n_static_syms, info->cu_index, |
21378 | 1); | |
1fd400ff | 21379 | |
b64f50a1 JK |
21380 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
21381 | entry->per_cu.offset.sect_off); | |
1fd400ff | 21382 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
21383 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
21384 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
21385 | obstack_grow (info->types_list, val, 8); |
21386 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
21387 | obstack_grow (info->types_list, val, 8); | |
21388 | ||
21389 | ++info->cu_index; | |
21390 | ||
21391 | return 1; | |
21392 | } | |
21393 | ||
95554aad TT |
21394 | /* Recurse into all "included" dependencies and write their symbols as |
21395 | if they appeared in this psymtab. */ | |
21396 | ||
21397 | static void | |
21398 | recursively_write_psymbols (struct objfile *objfile, | |
21399 | struct partial_symtab *psymtab, | |
21400 | struct mapped_symtab *symtab, | |
21401 | htab_t psyms_seen, | |
21402 | offset_type cu_index) | |
21403 | { | |
21404 | int i; | |
21405 | ||
21406 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
21407 | if (psymtab->dependencies[i]->user != NULL) | |
21408 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
21409 | symtab, psyms_seen, cu_index); | |
21410 | ||
21411 | write_psymbols (symtab, | |
21412 | psyms_seen, | |
21413 | objfile->global_psymbols.list + psymtab->globals_offset, | |
21414 | psymtab->n_global_syms, cu_index, | |
21415 | 0); | |
21416 | write_psymbols (symtab, | |
21417 | psyms_seen, | |
21418 | objfile->static_psymbols.list + psymtab->statics_offset, | |
21419 | psymtab->n_static_syms, cu_index, | |
21420 | 1); | |
21421 | } | |
21422 | ||
9291a0cd | 21423 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 21424 | |
9291a0cd TT |
21425 | static void |
21426 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
21427 | { | |
21428 | struct cleanup *cleanup; | |
21429 | char *filename, *cleanup_filename; | |
1fd400ff TT |
21430 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
21431 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
21432 | int i; |
21433 | FILE *out_file; | |
21434 | struct mapped_symtab *symtab; | |
21435 | offset_type val, size_of_contents, total_len; | |
21436 | struct stat st; | |
987d643c | 21437 | htab_t psyms_seen; |
0a5429f6 DE |
21438 | htab_t cu_index_htab; |
21439 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 21440 | |
9291a0cd TT |
21441 | if (dwarf2_per_objfile->using_index) |
21442 | error (_("Cannot use an index to create the index")); | |
21443 | ||
8b70b953 TT |
21444 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
21445 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
21446 | ||
260b681b DE |
21447 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
21448 | return; | |
21449 | ||
4262abfb JK |
21450 | if (stat (objfile_name (objfile), &st) < 0) |
21451 | perror_with_name (objfile_name (objfile)); | |
9291a0cd | 21452 | |
4262abfb | 21453 | filename = concat (dir, SLASH_STRING, lbasename (objfile_name (objfile)), |
9291a0cd TT |
21454 | INDEX_SUFFIX, (char *) NULL); |
21455 | cleanup = make_cleanup (xfree, filename); | |
21456 | ||
614c279d | 21457 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
21458 | if (!out_file) |
21459 | error (_("Can't open `%s' for writing"), filename); | |
21460 | ||
21461 | cleanup_filename = filename; | |
21462 | make_cleanup (unlink_if_set, &cleanup_filename); | |
21463 | ||
21464 | symtab = create_mapped_symtab (); | |
21465 | make_cleanup (cleanup_mapped_symtab, symtab); | |
21466 | ||
21467 | obstack_init (&addr_obstack); | |
21468 | make_cleanup_obstack_free (&addr_obstack); | |
21469 | ||
21470 | obstack_init (&cu_list); | |
21471 | make_cleanup_obstack_free (&cu_list); | |
21472 | ||
1fd400ff TT |
21473 | obstack_init (&types_cu_list); |
21474 | make_cleanup_obstack_free (&types_cu_list); | |
21475 | ||
987d643c TT |
21476 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
21477 | NULL, xcalloc, xfree); | |
96408a79 | 21478 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 21479 | |
0a5429f6 DE |
21480 | /* While we're scanning CU's create a table that maps a psymtab pointer |
21481 | (which is what addrmap records) to its index (which is what is recorded | |
21482 | in the index file). This will later be needed to write the address | |
21483 | table. */ | |
21484 | cu_index_htab = htab_create_alloc (100, | |
21485 | hash_psymtab_cu_index, | |
21486 | eq_psymtab_cu_index, | |
21487 | NULL, xcalloc, xfree); | |
96408a79 | 21488 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
21489 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
21490 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
21491 | * dwarf2_per_objfile->n_comp_units); | |
21492 | make_cleanup (xfree, psymtab_cu_index_map); | |
21493 | ||
21494 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
21495 | work here. Also, the debug_types entries do not appear in |
21496 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
21497 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
21498 | { | |
3e43a32a MS |
21499 | struct dwarf2_per_cu_data *per_cu |
21500 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 21501 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 21502 | gdb_byte val[8]; |
0a5429f6 DE |
21503 | struct psymtab_cu_index_map *map; |
21504 | void **slot; | |
9291a0cd | 21505 | |
92fac807 JK |
21506 | /* CU of a shared file from 'dwz -m' may be unused by this main file. |
21507 | It may be referenced from a local scope but in such case it does not | |
21508 | need to be present in .gdb_index. */ | |
21509 | if (psymtab == NULL) | |
21510 | continue; | |
21511 | ||
95554aad TT |
21512 | if (psymtab->user == NULL) |
21513 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 21514 | |
0a5429f6 DE |
21515 | map = &psymtab_cu_index_map[i]; |
21516 | map->psymtab = psymtab; | |
21517 | map->cu_index = i; | |
21518 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
21519 | gdb_assert (slot != NULL); | |
21520 | gdb_assert (*slot == NULL); | |
21521 | *slot = map; | |
9291a0cd | 21522 | |
b64f50a1 JK |
21523 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
21524 | per_cu->offset.sect_off); | |
9291a0cd | 21525 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 21526 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
21527 | obstack_grow (&cu_list, val, 8); |
21528 | } | |
21529 | ||
0a5429f6 DE |
21530 | /* Dump the address map. */ |
21531 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
21532 | ||
1fd400ff TT |
21533 | /* Write out the .debug_type entries, if any. */ |
21534 | if (dwarf2_per_objfile->signatured_types) | |
21535 | { | |
21536 | struct signatured_type_index_data sig_data; | |
21537 | ||
21538 | sig_data.objfile = objfile; | |
21539 | sig_data.symtab = symtab; | |
21540 | sig_data.types_list = &types_cu_list; | |
987d643c | 21541 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
21542 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
21543 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
21544 | write_one_signatured_type, &sig_data); | |
21545 | } | |
21546 | ||
156942c7 DE |
21547 | /* Now that we've processed all symbols we can shrink their cu_indices |
21548 | lists. */ | |
21549 | uniquify_cu_indices (symtab); | |
21550 | ||
9291a0cd TT |
21551 | obstack_init (&constant_pool); |
21552 | make_cleanup_obstack_free (&constant_pool); | |
21553 | obstack_init (&symtab_obstack); | |
21554 | make_cleanup_obstack_free (&symtab_obstack); | |
21555 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
21556 | ||
21557 | obstack_init (&contents); | |
21558 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 21559 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
21560 | total_len = size_of_contents; |
21561 | ||
21562 | /* The version number. */ | |
796a7ff8 | 21563 | val = MAYBE_SWAP (8); |
9291a0cd TT |
21564 | obstack_grow (&contents, &val, sizeof (val)); |
21565 | ||
21566 | /* The offset of the CU list from the start of the file. */ | |
21567 | val = MAYBE_SWAP (total_len); | |
21568 | obstack_grow (&contents, &val, sizeof (val)); | |
21569 | total_len += obstack_object_size (&cu_list); | |
21570 | ||
1fd400ff TT |
21571 | /* The offset of the types CU list from the start of the file. */ |
21572 | val = MAYBE_SWAP (total_len); | |
21573 | obstack_grow (&contents, &val, sizeof (val)); | |
21574 | total_len += obstack_object_size (&types_cu_list); | |
21575 | ||
9291a0cd TT |
21576 | /* The offset of the address table from the start of the file. */ |
21577 | val = MAYBE_SWAP (total_len); | |
21578 | obstack_grow (&contents, &val, sizeof (val)); | |
21579 | total_len += obstack_object_size (&addr_obstack); | |
21580 | ||
21581 | /* The offset of the symbol table from the start of the file. */ | |
21582 | val = MAYBE_SWAP (total_len); | |
21583 | obstack_grow (&contents, &val, sizeof (val)); | |
21584 | total_len += obstack_object_size (&symtab_obstack); | |
21585 | ||
21586 | /* The offset of the constant pool from the start of the file. */ | |
21587 | val = MAYBE_SWAP (total_len); | |
21588 | obstack_grow (&contents, &val, sizeof (val)); | |
21589 | total_len += obstack_object_size (&constant_pool); | |
21590 | ||
21591 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
21592 | ||
21593 | write_obstack (out_file, &contents); | |
21594 | write_obstack (out_file, &cu_list); | |
1fd400ff | 21595 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
21596 | write_obstack (out_file, &addr_obstack); |
21597 | write_obstack (out_file, &symtab_obstack); | |
21598 | write_obstack (out_file, &constant_pool); | |
21599 | ||
21600 | fclose (out_file); | |
21601 | ||
21602 | /* We want to keep the file, so we set cleanup_filename to NULL | |
21603 | here. See unlink_if_set. */ | |
21604 | cleanup_filename = NULL; | |
21605 | ||
21606 | do_cleanups (cleanup); | |
21607 | } | |
21608 | ||
90476074 TT |
21609 | /* Implementation of the `save gdb-index' command. |
21610 | ||
21611 | Note that the file format used by this command is documented in the | |
21612 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 21613 | |
9291a0cd TT |
21614 | static void |
21615 | save_gdb_index_command (char *arg, int from_tty) | |
21616 | { | |
21617 | struct objfile *objfile; | |
21618 | ||
21619 | if (!arg || !*arg) | |
96d19272 | 21620 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
21621 | |
21622 | ALL_OBJFILES (objfile) | |
21623 | { | |
21624 | struct stat st; | |
21625 | ||
21626 | /* If the objfile does not correspond to an actual file, skip it. */ | |
4262abfb | 21627 | if (stat (objfile_name (objfile), &st) < 0) |
9291a0cd TT |
21628 | continue; |
21629 | ||
21630 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
21631 | if (dwarf2_per_objfile) | |
21632 | { | |
21633 | volatile struct gdb_exception except; | |
21634 | ||
21635 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
21636 | { | |
21637 | write_psymtabs_to_index (objfile, arg); | |
21638 | } | |
21639 | if (except.reason < 0) | |
21640 | exception_fprintf (gdb_stderr, except, | |
21641 | _("Error while writing index for `%s': "), | |
4262abfb | 21642 | objfile_name (objfile)); |
9291a0cd TT |
21643 | } |
21644 | } | |
dce234bc PP |
21645 | } |
21646 | ||
9291a0cd TT |
21647 | \f |
21648 | ||
9eae7c52 TT |
21649 | int dwarf2_always_disassemble; |
21650 | ||
21651 | static void | |
21652 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
21653 | struct cmd_list_element *c, const char *value) | |
21654 | { | |
3e43a32a MS |
21655 | fprintf_filtered (file, |
21656 | _("Whether to always disassemble " | |
21657 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
21658 | value); |
21659 | } | |
21660 | ||
900e11f9 JK |
21661 | static void |
21662 | show_check_physname (struct ui_file *file, int from_tty, | |
21663 | struct cmd_list_element *c, const char *value) | |
21664 | { | |
21665 | fprintf_filtered (file, | |
21666 | _("Whether to check \"physname\" is %s.\n"), | |
21667 | value); | |
21668 | } | |
21669 | ||
6502dd73 DJ |
21670 | void _initialize_dwarf2_read (void); |
21671 | ||
21672 | void | |
21673 | _initialize_dwarf2_read (void) | |
21674 | { | |
96d19272 JK |
21675 | struct cmd_list_element *c; |
21676 | ||
dce234bc | 21677 | dwarf2_objfile_data_key |
c1bd65d0 | 21678 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 21679 | |
1bedd215 AC |
21680 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
21681 | Set DWARF 2 specific variables.\n\ | |
21682 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
21683 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
21684 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
21685 | ||
1bedd215 AC |
21686 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
21687 | Show DWARF 2 specific variables\n\ | |
21688 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
21689 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
21690 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
21691 | ||
21692 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
21693 | &dwarf2_max_cache_age, _("\ |
21694 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
21695 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
21696 | A higher limit means that cached compilation units will be stored\n\ | |
21697 | in memory longer, and more total memory will be used. Zero disables\n\ | |
21698 | caching, which can slow down startup."), | |
2c5b56ce | 21699 | NULL, |
920d2a44 | 21700 | show_dwarf2_max_cache_age, |
2c5b56ce | 21701 | &set_dwarf2_cmdlist, |
ae038cb0 | 21702 | &show_dwarf2_cmdlist); |
d97bc12b | 21703 | |
9eae7c52 TT |
21704 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
21705 | &dwarf2_always_disassemble, _("\ | |
21706 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
21707 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
21708 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
21709 | syntax. When disabled, expressions will be printed in a more\n\ | |
21710 | conversational style, when possible."), | |
21711 | NULL, | |
21712 | show_dwarf2_always_disassemble, | |
21713 | &set_dwarf2_cmdlist, | |
21714 | &show_dwarf2_cmdlist); | |
21715 | ||
45cfd468 DE |
21716 | add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
21717 | Set debugging of the dwarf2 reader."), _("\ | |
21718 | Show debugging of the dwarf2 reader."), _("\ | |
21719 | When enabled, debugging messages are printed during dwarf2 reading\n\ | |
21720 | and symtab expansion."), | |
21721 | NULL, | |
21722 | NULL, | |
21723 | &setdebuglist, &showdebuglist); | |
21724 | ||
ccce17b0 | 21725 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
21726 | Set debugging of the dwarf2 DIE reader."), _("\ |
21727 | Show debugging of the dwarf2 DIE reader."), _("\ | |
21728 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
21729 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
21730 | NULL, |
21731 | NULL, | |
21732 | &setdebuglist, &showdebuglist); | |
9291a0cd | 21733 | |
900e11f9 JK |
21734 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
21735 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
21736 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
21737 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
21738 | the demangler."), | |
21739 | NULL, show_check_physname, | |
21740 | &setdebuglist, &showdebuglist); | |
21741 | ||
e615022a DE |
21742 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
21743 | no_class, &use_deprecated_index_sections, _("\ | |
21744 | Set whether to use deprecated gdb_index sections."), _("\ | |
21745 | Show whether to use deprecated gdb_index sections."), _("\ | |
21746 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
21747 | Normally they are ignored either because of a missing feature or\n\ | |
21748 | performance issue.\n\ | |
21749 | Warning: This option must be enabled before gdb reads the file."), | |
21750 | NULL, | |
21751 | NULL, | |
21752 | &setlist, &showlist); | |
21753 | ||
96d19272 | 21754 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 21755 | _("\ |
fc1a9d6e | 21756 | Save a gdb-index file.\n\ |
11570e71 | 21757 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
21758 | &save_cmdlist); |
21759 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
21760 | |
21761 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
21762 | &dwarf2_locexpr_funcs); | |
21763 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
21764 | &dwarf2_loclist_funcs); | |
21765 | ||
21766 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
21767 | &dwarf2_block_frame_base_locexpr_funcs); | |
21768 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
21769 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 21770 | } |