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; | |
d521ce57 | 106 | const gdb_byte *buffer; |
dce234bc | 107 | bfd_size_type size; |
be391dca TT |
108 | /* True if we have tried to read this section. */ |
109 | int readin; | |
dce234bc PP |
110 | }; |
111 | ||
8b70b953 TT |
112 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
113 | DEF_VEC_O (dwarf2_section_info_def); | |
114 | ||
9291a0cd TT |
115 | /* All offsets in the index are of this type. It must be |
116 | architecture-independent. */ | |
117 | typedef uint32_t offset_type; | |
118 | ||
119 | DEF_VEC_I (offset_type); | |
120 | ||
156942c7 DE |
121 | /* Ensure only legit values are used. */ |
122 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
123 | do { \ | |
124 | gdb_assert ((unsigned int) (value) <= 1); \ | |
125 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
126 | } while (0) | |
127 | ||
128 | /* Ensure only legit values are used. */ | |
129 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
130 | do { \ | |
131 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
132 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
133 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
134 | } while (0) | |
135 | ||
136 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
137 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
138 | do { \ | |
139 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
140 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
141 | } while (0) | |
142 | ||
9291a0cd TT |
143 | /* A description of the mapped index. The file format is described in |
144 | a comment by the code that writes the index. */ | |
145 | struct mapped_index | |
146 | { | |
559a7a62 JK |
147 | /* Index data format version. */ |
148 | int version; | |
149 | ||
9291a0cd TT |
150 | /* The total length of the buffer. */ |
151 | off_t total_size; | |
b11b1f88 | 152 | |
9291a0cd TT |
153 | /* A pointer to the address table data. */ |
154 | const gdb_byte *address_table; | |
b11b1f88 | 155 | |
9291a0cd TT |
156 | /* Size of the address table data in bytes. */ |
157 | offset_type address_table_size; | |
b11b1f88 | 158 | |
3876f04e DE |
159 | /* The symbol table, implemented as a hash table. */ |
160 | const offset_type *symbol_table; | |
b11b1f88 | 161 | |
9291a0cd | 162 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 163 | offset_type symbol_table_slots; |
b11b1f88 | 164 | |
9291a0cd TT |
165 | /* A pointer to the constant pool. */ |
166 | const char *constant_pool; | |
167 | }; | |
168 | ||
95554aad TT |
169 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
170 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
171 | ||
9cdd5dbd DE |
172 | /* Collection of data recorded per objfile. |
173 | This hangs off of dwarf2_objfile_data_key. */ | |
174 | ||
6502dd73 DJ |
175 | struct dwarf2_per_objfile |
176 | { | |
dce234bc PP |
177 | struct dwarf2_section_info info; |
178 | struct dwarf2_section_info abbrev; | |
179 | struct dwarf2_section_info line; | |
dce234bc PP |
180 | struct dwarf2_section_info loc; |
181 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 182 | struct dwarf2_section_info macro; |
dce234bc PP |
183 | struct dwarf2_section_info str; |
184 | struct dwarf2_section_info ranges; | |
3019eac3 | 185 | struct dwarf2_section_info addr; |
dce234bc PP |
186 | struct dwarf2_section_info frame; |
187 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 188 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 189 | |
8b70b953 TT |
190 | VEC (dwarf2_section_info_def) *types; |
191 | ||
be391dca TT |
192 | /* Back link. */ |
193 | struct objfile *objfile; | |
194 | ||
d467dd73 | 195 | /* Table of all the compilation units. This is used to locate |
10b3939b | 196 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
197 | struct dwarf2_per_cu_data **all_comp_units; |
198 | ||
199 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
200 | int n_comp_units; | |
201 | ||
1fd400ff | 202 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 203 | int n_type_units; |
1fd400ff | 204 | |
d467dd73 | 205 | /* The .debug_types-related CUs (TUs). */ |
b4dd5633 | 206 | struct signatured_type **all_type_units; |
1fd400ff | 207 | |
f4dc4d17 DE |
208 | /* The number of entries in all_type_unit_groups. */ |
209 | int n_type_unit_groups; | |
210 | ||
211 | /* Table of type unit groups. | |
212 | This exists to make it easy to iterate over all CUs and TU groups. */ | |
213 | struct type_unit_group **all_type_unit_groups; | |
214 | ||
215 | /* Table of struct type_unit_group objects. | |
216 | The hash key is the DW_AT_stmt_list value. */ | |
217 | htab_t type_unit_groups; | |
72dca2f5 | 218 | |
348e048f DE |
219 | /* A table mapping .debug_types signatures to its signatured_type entry. |
220 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
221 | htab_t signatured_types; | |
222 | ||
f4dc4d17 DE |
223 | /* Type unit statistics, to see how well the scaling improvements |
224 | are doing. */ | |
225 | struct tu_stats | |
226 | { | |
227 | int nr_uniq_abbrev_tables; | |
228 | int nr_symtabs; | |
229 | int nr_symtab_sharers; | |
230 | int nr_stmt_less_type_units; | |
231 | } tu_stats; | |
232 | ||
233 | /* A chain of compilation units that are currently read in, so that | |
234 | they can be freed later. */ | |
235 | struct dwarf2_per_cu_data *read_in_chain; | |
236 | ||
3019eac3 DE |
237 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
238 | This is NULL if the table hasn't been allocated yet. */ | |
239 | htab_t dwo_files; | |
240 | ||
80626a55 DE |
241 | /* Non-zero if we've check for whether there is a DWP file. */ |
242 | int dwp_checked; | |
243 | ||
244 | /* The DWP file if there is one, or NULL. */ | |
245 | struct dwp_file *dwp_file; | |
246 | ||
36586728 TT |
247 | /* The shared '.dwz' file, if one exists. This is used when the |
248 | original data was compressed using 'dwz -m'. */ | |
249 | struct dwz_file *dwz_file; | |
250 | ||
72dca2f5 FR |
251 | /* A flag indicating wether this objfile has a section loaded at a |
252 | VMA of 0. */ | |
253 | int has_section_at_zero; | |
9291a0cd | 254 | |
ae2de4f8 DE |
255 | /* True if we are using the mapped index, |
256 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
257 | unsigned char using_index; |
258 | ||
ae2de4f8 | 259 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 260 | struct mapped_index *index_table; |
98bfdba5 | 261 | |
7b9f3c50 | 262 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
263 | TUs typically share line table entries with a CU, so we maintain a |
264 | separate table of all line table entries to support the sharing. | |
265 | Note that while there can be way more TUs than CUs, we've already | |
266 | sorted all the TUs into "type unit groups", grouped by their | |
267 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
268 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
269 | htab_t quick_file_names_table; |
270 | ||
98bfdba5 PA |
271 | /* Set during partial symbol reading, to prevent queueing of full |
272 | symbols. */ | |
273 | int reading_partial_symbols; | |
673bfd45 | 274 | |
dee91e82 | 275 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 276 | This is NULL if not allocated yet. |
02142a6c | 277 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 278 | htab_t die_type_hash; |
95554aad TT |
279 | |
280 | /* The CUs we recently read. */ | |
281 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
282 | }; |
283 | ||
284 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 285 | |
251d32d9 | 286 | /* Default names of the debugging sections. */ |
c906108c | 287 | |
233a11ab CS |
288 | /* Note that if the debugging section has been compressed, it might |
289 | have a name like .zdebug_info. */ | |
290 | ||
9cdd5dbd DE |
291 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
292 | { | |
251d32d9 TG |
293 | { ".debug_info", ".zdebug_info" }, |
294 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
295 | { ".debug_line", ".zdebug_line" }, | |
296 | { ".debug_loc", ".zdebug_loc" }, | |
297 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 298 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
299 | { ".debug_str", ".zdebug_str" }, |
300 | { ".debug_ranges", ".zdebug_ranges" }, | |
301 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 302 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
303 | { ".debug_frame", ".zdebug_frame" }, |
304 | { ".eh_frame", NULL }, | |
24d3216f TT |
305 | { ".gdb_index", ".zgdb_index" }, |
306 | 23 | |
251d32d9 | 307 | }; |
c906108c | 308 | |
80626a55 | 309 | /* List of DWO/DWP sections. */ |
3019eac3 | 310 | |
80626a55 | 311 | static const struct dwop_section_names |
3019eac3 DE |
312 | { |
313 | struct dwarf2_section_names abbrev_dwo; | |
314 | struct dwarf2_section_names info_dwo; | |
315 | struct dwarf2_section_names line_dwo; | |
316 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
317 | struct dwarf2_section_names macinfo_dwo; |
318 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
319 | struct dwarf2_section_names str_dwo; |
320 | struct dwarf2_section_names str_offsets_dwo; | |
321 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
322 | struct dwarf2_section_names cu_index; |
323 | struct dwarf2_section_names tu_index; | |
3019eac3 | 324 | } |
80626a55 | 325 | dwop_section_names = |
3019eac3 DE |
326 | { |
327 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
328 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
329 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
330 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
331 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
332 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
333 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
334 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
335 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
336 | { ".debug_cu_index", ".zdebug_cu_index" }, |
337 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
338 | }; |
339 | ||
c906108c SS |
340 | /* local data types */ |
341 | ||
107d2387 AC |
342 | /* The data in a compilation unit header, after target2host |
343 | translation, looks like this. */ | |
c906108c | 344 | struct comp_unit_head |
a738430d | 345 | { |
c764a876 | 346 | unsigned int length; |
a738430d | 347 | short version; |
a738430d MK |
348 | unsigned char addr_size; |
349 | unsigned char signed_addr_p; | |
b64f50a1 | 350 | sect_offset abbrev_offset; |
57349743 | 351 | |
a738430d MK |
352 | /* Size of file offsets; either 4 or 8. */ |
353 | unsigned int offset_size; | |
57349743 | 354 | |
a738430d MK |
355 | /* Size of the length field; either 4 or 12. */ |
356 | unsigned int initial_length_size; | |
57349743 | 357 | |
a738430d MK |
358 | /* Offset to the first byte of this compilation unit header in the |
359 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 360 | sect_offset offset; |
57349743 | 361 | |
d00adf39 DE |
362 | /* Offset to first die in this cu from the start of the cu. |
363 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 364 | cu_offset first_die_offset; |
a738430d | 365 | }; |
c906108c | 366 | |
3da10d80 KS |
367 | /* Type used for delaying computation of method physnames. |
368 | See comments for compute_delayed_physnames. */ | |
369 | struct delayed_method_info | |
370 | { | |
371 | /* The type to which the method is attached, i.e., its parent class. */ | |
372 | struct type *type; | |
373 | ||
374 | /* The index of the method in the type's function fieldlists. */ | |
375 | int fnfield_index; | |
376 | ||
377 | /* The index of the method in the fieldlist. */ | |
378 | int index; | |
379 | ||
380 | /* The name of the DIE. */ | |
381 | const char *name; | |
382 | ||
383 | /* The DIE associated with this method. */ | |
384 | struct die_info *die; | |
385 | }; | |
386 | ||
387 | typedef struct delayed_method_info delayed_method_info; | |
388 | DEF_VEC_O (delayed_method_info); | |
389 | ||
e7c27a73 DJ |
390 | /* Internal state when decoding a particular compilation unit. */ |
391 | struct dwarf2_cu | |
392 | { | |
393 | /* The objfile containing this compilation unit. */ | |
394 | struct objfile *objfile; | |
395 | ||
d00adf39 | 396 | /* The header of the compilation unit. */ |
e7c27a73 | 397 | struct comp_unit_head header; |
e142c38c | 398 | |
d00adf39 DE |
399 | /* Base address of this compilation unit. */ |
400 | CORE_ADDR base_address; | |
401 | ||
402 | /* Non-zero if base_address has been set. */ | |
403 | int base_known; | |
404 | ||
e142c38c DJ |
405 | /* The language we are debugging. */ |
406 | enum language language; | |
407 | const struct language_defn *language_defn; | |
408 | ||
b0f35d58 DL |
409 | const char *producer; |
410 | ||
e142c38c DJ |
411 | /* The generic symbol table building routines have separate lists for |
412 | file scope symbols and all all other scopes (local scopes). So | |
413 | we need to select the right one to pass to add_symbol_to_list(). | |
414 | We do it by keeping a pointer to the correct list in list_in_scope. | |
415 | ||
416 | FIXME: The original dwarf code just treated the file scope as the | |
417 | first local scope, and all other local scopes as nested local | |
418 | scopes, and worked fine. Check to see if we really need to | |
419 | distinguish these in buildsym.c. */ | |
420 | struct pending **list_in_scope; | |
421 | ||
433df2d4 DE |
422 | /* The abbrev table for this CU. |
423 | Normally this points to the abbrev table in the objfile. | |
424 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
425 | struct abbrev_table *abbrev_table; | |
72bf9492 | 426 | |
b64f50a1 JK |
427 | /* Hash table holding all the loaded partial DIEs |
428 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
429 | htab_t partial_dies; |
430 | ||
431 | /* Storage for things with the same lifetime as this read-in compilation | |
432 | unit, including partial DIEs. */ | |
433 | struct obstack comp_unit_obstack; | |
434 | ||
ae038cb0 DJ |
435 | /* When multiple dwarf2_cu structures are living in memory, this field |
436 | chains them all together, so that they can be released efficiently. | |
437 | We will probably also want a generation counter so that most-recently-used | |
438 | compilation units are cached... */ | |
439 | struct dwarf2_per_cu_data *read_in_chain; | |
440 | ||
441 | /* Backchain to our per_cu entry if the tree has been built. */ | |
442 | struct dwarf2_per_cu_data *per_cu; | |
443 | ||
444 | /* How many compilation units ago was this CU last referenced? */ | |
445 | int last_used; | |
446 | ||
b64f50a1 JK |
447 | /* A hash table of DIE cu_offset for following references with |
448 | die_info->offset.sect_off as hash. */ | |
51545339 | 449 | htab_t die_hash; |
10b3939b DJ |
450 | |
451 | /* Full DIEs if read in. */ | |
452 | struct die_info *dies; | |
453 | ||
454 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
455 | units referenced by this one. Only set during full symbol processing; | |
456 | partial symbol tables do not have dependencies. */ | |
457 | htab_t dependencies; | |
458 | ||
cb1df416 DJ |
459 | /* Header data from the line table, during full symbol processing. */ |
460 | struct line_header *line_header; | |
461 | ||
3da10d80 KS |
462 | /* A list of methods which need to have physnames computed |
463 | after all type information has been read. */ | |
464 | VEC (delayed_method_info) *method_list; | |
465 | ||
96408a79 SA |
466 | /* To be copied to symtab->call_site_htab. */ |
467 | htab_t call_site_htab; | |
468 | ||
034e5797 DE |
469 | /* Non-NULL if this CU came from a DWO file. |
470 | There is an invariant here that is important to remember: | |
471 | Except for attributes copied from the top level DIE in the "main" | |
472 | (or "stub") file in preparation for reading the DWO file | |
473 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
474 | Either there isn't a DWO file (in which case this is NULL and the point | |
475 | is moot), or there is and either we're not going to read it (in which | |
476 | case this is NULL) or there is and we are reading it (in which case this | |
477 | is non-NULL). */ | |
3019eac3 DE |
478 | struct dwo_unit *dwo_unit; |
479 | ||
480 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
481 | (zero is a valid value though). | |
482 | Note this value comes from the stub CU/TU's DIE. */ | |
483 | ULONGEST addr_base; | |
484 | ||
2e3cf129 DE |
485 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
486 | (zero is a valid value though). | |
487 | Note this value comes from the stub CU/TU's DIE. | |
488 | Also note that the value is zero in the non-DWO case so this value can | |
ab435259 DE |
489 | be used without needing to know whether DWO files are in use or not. |
490 | N.B. This does not apply to DW_AT_ranges appearing in | |
491 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
492 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
493 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
494 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
495 | ULONGEST ranges_base; |
496 | ||
ae038cb0 DJ |
497 | /* Mark used when releasing cached dies. */ |
498 | unsigned int mark : 1; | |
499 | ||
8be455d7 JK |
500 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
501 | This test is imperfect as there may exist optimized debug code not using | |
502 | any location list and still facing inlining issues if handled as | |
503 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 504 | unsigned int has_loclist : 1; |
ba919b58 | 505 | |
1b80a9fa JK |
506 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
507 | if all the producer_is_* fields are valid. This information is cached | |
508 | because profiling CU expansion showed excessive time spent in | |
509 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
510 | unsigned int checked_producer : 1; |
511 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 512 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 513 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
514 | |
515 | /* When set, the file that we're processing is known to have | |
516 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
517 | this information, but later versions do. */ | |
518 | ||
519 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
520 | }; |
521 | ||
10b3939b DJ |
522 | /* Persistent data held for a compilation unit, even when not |
523 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 524 | read_symtab_private field of the psymtab. */ |
10b3939b | 525 | |
ae038cb0 DJ |
526 | struct dwarf2_per_cu_data |
527 | { | |
36586728 | 528 | /* The start offset and length of this compilation unit. |
45452591 | 529 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
530 | initial_length_size. |
531 | If the DIE refers to a DWO file, this is always of the original die, | |
532 | not the DWO file. */ | |
b64f50a1 | 533 | sect_offset offset; |
36586728 | 534 | unsigned int length; |
ae038cb0 DJ |
535 | |
536 | /* Flag indicating this compilation unit will be read in before | |
537 | any of the current compilation units are processed. */ | |
c764a876 | 538 | unsigned int queued : 1; |
ae038cb0 | 539 | |
0d99eb77 DE |
540 | /* This flag will be set when reading partial DIEs if we need to load |
541 | absolutely all DIEs for this compilation unit, instead of just the ones | |
542 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
543 | hash table and don't find it. */ |
544 | unsigned int load_all_dies : 1; | |
545 | ||
0186c6a7 DE |
546 | /* Non-zero if this CU is from .debug_types. |
547 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
548 | this is non-zero. */ | |
3019eac3 DE |
549 | unsigned int is_debug_types : 1; |
550 | ||
36586728 TT |
551 | /* Non-zero if this CU is from the .dwz file. */ |
552 | unsigned int is_dwz : 1; | |
553 | ||
3019eac3 DE |
554 | /* The section this CU/TU lives in. |
555 | If the DIE refers to a DWO file, this is always the original die, | |
556 | not the DWO file. */ | |
8a0459fd | 557 | struct dwarf2_section_info *section; |
348e048f | 558 | |
17ea53c3 JK |
559 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
560 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 561 | struct dwarf2_cu *cu; |
1c379e20 | 562 | |
9cdd5dbd DE |
563 | /* The corresponding objfile. |
564 | Normally we can get the objfile from dwarf2_per_objfile. | |
565 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
566 | struct objfile *objfile; |
567 | ||
568 | /* When using partial symbol tables, the 'psymtab' field is active. | |
569 | Otherwise the 'quick' field is active. */ | |
570 | union | |
571 | { | |
572 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 573 | or NULL for unread partial units. */ |
9291a0cd TT |
574 | struct partial_symtab *psymtab; |
575 | ||
576 | /* Data needed by the "quick" functions. */ | |
577 | struct dwarf2_per_cu_quick_data *quick; | |
578 | } v; | |
95554aad | 579 | |
796a7ff8 DE |
580 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
581 | while reading psymtabs, used to compute the psymtab dependencies, | |
582 | and then cleared. Then it is filled in again while reading full | |
583 | symbols, and only deleted when the objfile is destroyed. | |
584 | ||
585 | This is also used to work around a difference between the way gold | |
586 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
587 | is a gold bug. For symbols coming from TUs, gold records in the index | |
588 | the CU that includes the TU instead of the TU itself. This breaks | |
589 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
590 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
591 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
592 | we need to look in TU Z to find X. Fortunately, this is akin to | |
593 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
594 | .gdb_index version <=7 this also records the TUs that the CU referred | |
595 | to. Concurrently with this change gdb was modified to emit version 8 | |
596 | indices so we only pay a price for gold generated indices. */ | |
597 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; | |
ae038cb0 DJ |
598 | }; |
599 | ||
348e048f DE |
600 | /* Entry in the signatured_types hash table. */ |
601 | ||
602 | struct signatured_type | |
603 | { | |
42e7ad6c | 604 | /* The "per_cu" object of this type. |
ac9ec31b | 605 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
606 | N.B.: This is the first member so that it's easy to convert pointers |
607 | between them. */ | |
608 | struct dwarf2_per_cu_data per_cu; | |
609 | ||
3019eac3 | 610 | /* The type's signature. */ |
348e048f DE |
611 | ULONGEST signature; |
612 | ||
3019eac3 | 613 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
614 | If this TU is a DWO stub and the definition lives in a DWO file |
615 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
616 | cu_offset type_offset_in_tu; |
617 | ||
618 | /* Offset in the section of the type's DIE. | |
619 | If the definition lives in a DWO file, this is the offset in the | |
620 | .debug_types.dwo section. | |
621 | The value is zero until the actual value is known. | |
622 | Zero is otherwise not a valid section offset. */ | |
623 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
624 | |
625 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
626 | can share them. This points to the containing symtab. */ | |
627 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
628 | |
629 | /* The type. | |
630 | The first time we encounter this type we fully read it in and install it | |
631 | in the symbol tables. Subsequent times we only need the type. */ | |
632 | struct type *type; | |
348e048f DE |
633 | }; |
634 | ||
0186c6a7 DE |
635 | typedef struct signatured_type *sig_type_ptr; |
636 | DEF_VEC_P (sig_type_ptr); | |
637 | ||
094b34ac DE |
638 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
639 | This includes type_unit_group and quick_file_names. */ | |
640 | ||
641 | struct stmt_list_hash | |
642 | { | |
643 | /* The DWO unit this table is from or NULL if there is none. */ | |
644 | struct dwo_unit *dwo_unit; | |
645 | ||
646 | /* Offset in .debug_line or .debug_line.dwo. */ | |
647 | sect_offset line_offset; | |
648 | }; | |
649 | ||
f4dc4d17 DE |
650 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
651 | an object of this type. */ | |
652 | ||
653 | struct type_unit_group | |
654 | { | |
0186c6a7 | 655 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
656 | To simplify things we create an artificial CU that "includes" all the |
657 | type units using this stmt_list so that the rest of the code still has | |
658 | a "per_cu" handle on the symtab. | |
659 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 660 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
661 | struct dwarf2_per_cu_data per_cu; |
662 | ||
0186c6a7 DE |
663 | /* The TUs that share this DW_AT_stmt_list entry. |
664 | This is added to while parsing type units to build partial symtabs, | |
665 | and is deleted afterwards and not used again. */ | |
666 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 DE |
667 | |
668 | /* The primary symtab. | |
094b34ac DE |
669 | Type units in a group needn't all be defined in the same source file, |
670 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
671 | struct symtab *primary_symtab; |
672 | ||
094b34ac DE |
673 | /* The data used to construct the hash key. */ |
674 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
675 | |
676 | /* The number of symtabs from the line header. | |
677 | The value here must match line_header.num_file_names. */ | |
678 | unsigned int num_symtabs; | |
679 | ||
680 | /* The symbol tables for this TU (obtained from the files listed in | |
681 | DW_AT_stmt_list). | |
682 | WARNING: The order of entries here must match the order of entries | |
683 | in the line header. After the first TU using this type_unit_group, the | |
684 | line header for the subsequent TUs is recreated from this. This is done | |
685 | because we need to use the same symtabs for each TU using the same | |
686 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
687 | there's no guarantee the line header doesn't have duplicate entries. */ | |
688 | struct symtab **symtabs; | |
689 | }; | |
690 | ||
80626a55 | 691 | /* These sections are what may appear in a DWO file. */ |
3019eac3 DE |
692 | |
693 | struct dwo_sections | |
694 | { | |
695 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
696 | struct dwarf2_section_info line; |
697 | struct dwarf2_section_info loc; | |
09262596 DE |
698 | struct dwarf2_section_info macinfo; |
699 | struct dwarf2_section_info macro; | |
3019eac3 DE |
700 | struct dwarf2_section_info str; |
701 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
702 | /* In the case of a virtual DWO file, these two are unused. */ |
703 | struct dwarf2_section_info info; | |
3019eac3 DE |
704 | VEC (dwarf2_section_info_def) *types; |
705 | }; | |
706 | ||
c88ee1f0 | 707 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
708 | |
709 | struct dwo_unit | |
710 | { | |
711 | /* Backlink to the containing struct dwo_file. */ | |
712 | struct dwo_file *dwo_file; | |
713 | ||
714 | /* The "id" that distinguishes this CU/TU. | |
715 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
716 | Since signatures came first, we stick with it for consistency. */ | |
717 | ULONGEST signature; | |
718 | ||
719 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 720 | struct dwarf2_section_info *section; |
3019eac3 DE |
721 | |
722 | /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */ | |
723 | sect_offset offset; | |
724 | unsigned int length; | |
725 | ||
726 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
727 | cu_offset type_offset_in_tu; | |
728 | }; | |
729 | ||
80626a55 DE |
730 | /* Data for one DWO file. |
731 | This includes virtual DWO files that have been packaged into a | |
732 | DWP file. */ | |
3019eac3 DE |
733 | |
734 | struct dwo_file | |
735 | { | |
0ac5b59e | 736 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
737 | For virtual DWO files the name is constructed from the section offsets |
738 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
739 | from related CU+TUs. */ | |
0ac5b59e DE |
740 | const char *dwo_name; |
741 | ||
742 | /* The DW_AT_comp_dir attribute. */ | |
743 | const char *comp_dir; | |
3019eac3 | 744 | |
80626a55 DE |
745 | /* The bfd, when the file is open. Otherwise this is NULL. |
746 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
747 | bfd *dbfd; | |
3019eac3 DE |
748 | |
749 | /* Section info for this file. */ | |
750 | struct dwo_sections sections; | |
751 | ||
19c3d4c9 DE |
752 | /* The CU in the file. |
753 | We only support one because having more than one requires hacking the | |
754 | dwo_name of each to match, which is highly unlikely to happen. | |
755 | Doing this means all TUs can share comp_dir: We also assume that | |
756 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
757 | struct dwo_unit *cu; | |
3019eac3 DE |
758 | |
759 | /* Table of TUs in the file. | |
760 | Each element is a struct dwo_unit. */ | |
761 | htab_t tus; | |
762 | }; | |
763 | ||
80626a55 DE |
764 | /* These sections are what may appear in a DWP file. */ |
765 | ||
766 | struct dwp_sections | |
767 | { | |
768 | struct dwarf2_section_info str; | |
769 | struct dwarf2_section_info cu_index; | |
770 | struct dwarf2_section_info tu_index; | |
771 | /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced | |
772 | by section number. We don't need to record them here. */ | |
773 | }; | |
774 | ||
775 | /* These sections are what may appear in a virtual DWO file. */ | |
776 | ||
777 | struct virtual_dwo_sections | |
778 | { | |
779 | struct dwarf2_section_info abbrev; | |
780 | struct dwarf2_section_info line; | |
781 | struct dwarf2_section_info loc; | |
782 | struct dwarf2_section_info macinfo; | |
783 | struct dwarf2_section_info macro; | |
784 | struct dwarf2_section_info str_offsets; | |
785 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 786 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
787 | struct dwarf2_section_info info_or_types; |
788 | }; | |
789 | ||
790 | /* Contents of DWP hash tables. */ | |
791 | ||
792 | struct dwp_hash_table | |
793 | { | |
794 | uint32_t nr_units, nr_slots; | |
795 | const gdb_byte *hash_table, *unit_table, *section_pool; | |
796 | }; | |
797 | ||
798 | /* Data for one DWP file. */ | |
799 | ||
800 | struct dwp_file | |
801 | { | |
802 | /* Name of the file. */ | |
803 | const char *name; | |
804 | ||
805 | /* The bfd, when the file is open. Otherwise this is NULL. */ | |
806 | bfd *dbfd; | |
807 | ||
808 | /* Section info for this file. */ | |
809 | struct dwp_sections sections; | |
810 | ||
811 | /* Table of CUs in the file. */ | |
812 | const struct dwp_hash_table *cus; | |
813 | ||
814 | /* Table of TUs in the file. */ | |
815 | const struct dwp_hash_table *tus; | |
816 | ||
817 | /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ | |
818 | htab_t loaded_cutus; | |
819 | ||
820 | /* Table to map ELF section numbers to their sections. */ | |
821 | unsigned int num_sections; | |
822 | asection **elf_sections; | |
823 | }; | |
824 | ||
36586728 TT |
825 | /* This represents a '.dwz' file. */ |
826 | ||
827 | struct dwz_file | |
828 | { | |
829 | /* A dwz file can only contain a few sections. */ | |
830 | struct dwarf2_section_info abbrev; | |
831 | struct dwarf2_section_info info; | |
832 | struct dwarf2_section_info str; | |
833 | struct dwarf2_section_info line; | |
834 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 835 | struct dwarf2_section_info gdb_index; |
36586728 TT |
836 | |
837 | /* The dwz's BFD. */ | |
838 | bfd *dwz_bfd; | |
839 | }; | |
840 | ||
0963b4bd MS |
841 | /* Struct used to pass misc. parameters to read_die_and_children, et |
842 | al. which are used for both .debug_info and .debug_types dies. | |
843 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 844 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
845 | |
846 | struct die_reader_specs | |
847 | { | |
dee91e82 | 848 | /* die_section->asection->owner. */ |
93311388 DE |
849 | bfd* abfd; |
850 | ||
851 | /* The CU of the DIE we are parsing. */ | |
852 | struct dwarf2_cu *cu; | |
853 | ||
80626a55 | 854 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
855 | struct dwo_file *dwo_file; |
856 | ||
dee91e82 | 857 | /* The section the die comes from. |
3019eac3 | 858 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
859 | struct dwarf2_section_info *die_section; |
860 | ||
861 | /* die_section->buffer. */ | |
d521ce57 | 862 | const gdb_byte *buffer; |
f664829e DE |
863 | |
864 | /* The end of the buffer. */ | |
865 | const gdb_byte *buffer_end; | |
93311388 DE |
866 | }; |
867 | ||
fd820528 | 868 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 869 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 870 | const gdb_byte *info_ptr, |
dee91e82 DE |
871 | struct die_info *comp_unit_die, |
872 | int has_children, | |
873 | void *data); | |
874 | ||
debd256d JB |
875 | /* The line number information for a compilation unit (found in the |
876 | .debug_line section) begins with a "statement program header", | |
877 | which contains the following information. */ | |
878 | struct line_header | |
879 | { | |
880 | unsigned int total_length; | |
881 | unsigned short version; | |
882 | unsigned int header_length; | |
883 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 884 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
885 | unsigned char default_is_stmt; |
886 | int line_base; | |
887 | unsigned char line_range; | |
888 | unsigned char opcode_base; | |
889 | ||
890 | /* standard_opcode_lengths[i] is the number of operands for the | |
891 | standard opcode whose value is i. This means that | |
892 | standard_opcode_lengths[0] is unused, and the last meaningful | |
893 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
894 | unsigned char *standard_opcode_lengths; | |
895 | ||
896 | /* The include_directories table. NOTE! These strings are not | |
897 | allocated with xmalloc; instead, they are pointers into | |
898 | debug_line_buffer. If you try to free them, `free' will get | |
899 | indigestion. */ | |
900 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 901 | const char **include_dirs; |
debd256d JB |
902 | |
903 | /* The file_names table. NOTE! These strings are not allocated | |
904 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
905 | Don't try to free them directly. */ | |
906 | unsigned int num_file_names, file_names_size; | |
907 | struct file_entry | |
c906108c | 908 | { |
d521ce57 | 909 | const char *name; |
debd256d JB |
910 | unsigned int dir_index; |
911 | unsigned int mod_time; | |
912 | unsigned int length; | |
aaa75496 | 913 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 914 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
915 | } *file_names; |
916 | ||
917 | /* The start and end of the statement program following this | |
6502dd73 | 918 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 919 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 920 | }; |
c906108c SS |
921 | |
922 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 923 | need this much information. */ |
c906108c SS |
924 | struct partial_die_info |
925 | { | |
72bf9492 | 926 | /* Offset of this DIE. */ |
b64f50a1 | 927 | sect_offset offset; |
72bf9492 DJ |
928 | |
929 | /* DWARF-2 tag for this DIE. */ | |
930 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
931 | ||
72bf9492 DJ |
932 | /* Assorted flags describing the data found in this DIE. */ |
933 | unsigned int has_children : 1; | |
934 | unsigned int is_external : 1; | |
935 | unsigned int is_declaration : 1; | |
936 | unsigned int has_type : 1; | |
937 | unsigned int has_specification : 1; | |
938 | unsigned int has_pc_info : 1; | |
481860b3 | 939 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
940 | |
941 | /* Flag set if the SCOPE field of this structure has been | |
942 | computed. */ | |
943 | unsigned int scope_set : 1; | |
944 | ||
fa4028e9 JB |
945 | /* Flag set if the DIE has a byte_size attribute. */ |
946 | unsigned int has_byte_size : 1; | |
947 | ||
98bfdba5 PA |
948 | /* Flag set if any of the DIE's children are template arguments. */ |
949 | unsigned int has_template_arguments : 1; | |
950 | ||
abc72ce4 DE |
951 | /* Flag set if fixup_partial_die has been called on this die. */ |
952 | unsigned int fixup_called : 1; | |
953 | ||
36586728 TT |
954 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
955 | unsigned int is_dwz : 1; | |
956 | ||
957 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
958 | unsigned int spec_is_dwz : 1; | |
959 | ||
72bf9492 | 960 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 961 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 962 | const char *name; |
72bf9492 | 963 | |
abc72ce4 DE |
964 | /* The linkage name, if present. */ |
965 | const char *linkage_name; | |
966 | ||
72bf9492 DJ |
967 | /* The scope to prepend to our children. This is generally |
968 | allocated on the comp_unit_obstack, so will disappear | |
969 | when this compilation unit leaves the cache. */ | |
15d034d0 | 970 | const char *scope; |
72bf9492 | 971 | |
95554aad TT |
972 | /* Some data associated with the partial DIE. The tag determines |
973 | which field is live. */ | |
974 | union | |
975 | { | |
976 | /* The location description associated with this DIE, if any. */ | |
977 | struct dwarf_block *locdesc; | |
978 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
979 | sect_offset offset; | |
980 | } d; | |
72bf9492 DJ |
981 | |
982 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
983 | CORE_ADDR lowpc; |
984 | CORE_ADDR highpc; | |
72bf9492 | 985 | |
93311388 | 986 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 987 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
988 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
989 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 990 | const gdb_byte *sibling; |
72bf9492 DJ |
991 | |
992 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
993 | DW_AT_specification (or DW_AT_abstract_origin or | |
994 | DW_AT_extension). */ | |
b64f50a1 | 995 | sect_offset spec_offset; |
72bf9492 DJ |
996 | |
997 | /* Pointers to this DIE's parent, first child, and next sibling, | |
998 | if any. */ | |
999 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1000 | }; |
1001 | ||
0963b4bd | 1002 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1003 | struct abbrev_info |
1004 | { | |
1005 | unsigned int number; /* number identifying abbrev */ | |
1006 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1007 | unsigned short has_children; /* boolean */ |
1008 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1009 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1010 | struct abbrev_info *next; /* next in chain */ | |
1011 | }; | |
1012 | ||
1013 | struct attr_abbrev | |
1014 | { | |
9d25dd43 DE |
1015 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1016 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1017 | }; |
1018 | ||
433df2d4 DE |
1019 | /* Size of abbrev_table.abbrev_hash_table. */ |
1020 | #define ABBREV_HASH_SIZE 121 | |
1021 | ||
1022 | /* Top level data structure to contain an abbreviation table. */ | |
1023 | ||
1024 | struct abbrev_table | |
1025 | { | |
f4dc4d17 DE |
1026 | /* Where the abbrev table came from. |
1027 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1028 | sect_offset offset; |
1029 | ||
1030 | /* Storage for the abbrev table. */ | |
1031 | struct obstack abbrev_obstack; | |
1032 | ||
1033 | /* Hash table of abbrevs. | |
1034 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1035 | It could be statically allocated, but the previous code didn't so we | |
1036 | don't either. */ | |
1037 | struct abbrev_info **abbrevs; | |
1038 | }; | |
1039 | ||
0963b4bd | 1040 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1041 | struct attribute |
1042 | { | |
9d25dd43 | 1043 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1044 | ENUM_BITFIELD(dwarf_form) form : 15; |
1045 | ||
1046 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1047 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1048 | here for better struct attribute alignment. */ | |
1049 | unsigned int string_is_canonical : 1; | |
1050 | ||
b60c80d6 DJ |
1051 | union |
1052 | { | |
15d034d0 | 1053 | const char *str; |
b60c80d6 | 1054 | struct dwarf_block *blk; |
43bbcdc2 PH |
1055 | ULONGEST unsnd; |
1056 | LONGEST snd; | |
b60c80d6 | 1057 | CORE_ADDR addr; |
ac9ec31b | 1058 | ULONGEST signature; |
b60c80d6 DJ |
1059 | } |
1060 | u; | |
1061 | }; | |
1062 | ||
0963b4bd | 1063 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1064 | struct die_info |
1065 | { | |
76815b17 DE |
1066 | /* DWARF-2 tag for this DIE. */ |
1067 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1068 | ||
1069 | /* Number of attributes */ | |
98bfdba5 PA |
1070 | unsigned char num_attrs; |
1071 | ||
1072 | /* True if we're presently building the full type name for the | |
1073 | type derived from this DIE. */ | |
1074 | unsigned char building_fullname : 1; | |
76815b17 DE |
1075 | |
1076 | /* Abbrev number */ | |
1077 | unsigned int abbrev; | |
1078 | ||
93311388 | 1079 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1080 | sect_offset offset; |
78ba4af6 JB |
1081 | |
1082 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1083 | points to this die's parent; CHILD points to the first child of | |
1084 | this node; and all the children of a given node are chained | |
4950bc1c | 1085 | together via their SIBLING fields. */ |
639d11d3 DC |
1086 | struct die_info *child; /* Its first child, if any. */ |
1087 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1088 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1089 | |
b60c80d6 DJ |
1090 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1091 | zero, but it's not common and zero-sized arrays are not | |
1092 | sufficiently portable C. */ | |
1093 | struct attribute attrs[1]; | |
c906108c SS |
1094 | }; |
1095 | ||
0963b4bd | 1096 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1097 | |
1098 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1099 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1100 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1101 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1102 | #define DW_SND(attr) ((attr)->u.snd) | |
1103 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1104 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1105 | |
0963b4bd | 1106 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1107 | struct dwarf_block |
1108 | { | |
56eb65bd | 1109 | size_t size; |
1d6edc3c JK |
1110 | |
1111 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1112 | const gdb_byte *data; |
c906108c SS |
1113 | }; |
1114 | ||
c906108c SS |
1115 | #ifndef ATTR_ALLOC_CHUNK |
1116 | #define ATTR_ALLOC_CHUNK 4 | |
1117 | #endif | |
1118 | ||
c906108c SS |
1119 | /* Allocate fields for structs, unions and enums in this size. */ |
1120 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1121 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1122 | #endif | |
1123 | ||
c906108c SS |
1124 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1125 | but this would require a corresponding change in unpack_field_as_long | |
1126 | and friends. */ | |
1127 | static int bits_per_byte = 8; | |
1128 | ||
1129 | /* The routines that read and process dies for a C struct or C++ class | |
1130 | pass lists of data member fields and lists of member function fields | |
1131 | in an instance of a field_info structure, as defined below. */ | |
1132 | struct field_info | |
c5aa993b | 1133 | { |
0963b4bd | 1134 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1135 | struct nextfield |
1136 | { | |
1137 | struct nextfield *next; | |
1138 | int accessibility; | |
1139 | int virtuality; | |
1140 | struct field field; | |
1141 | } | |
7d0ccb61 | 1142 | *fields, *baseclasses; |
c906108c | 1143 | |
7d0ccb61 | 1144 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1145 | int nfields; |
c906108c | 1146 | |
c5aa993b JM |
1147 | /* Number of baseclasses. */ |
1148 | int nbaseclasses; | |
c906108c | 1149 | |
c5aa993b JM |
1150 | /* Set if the accesibility of one of the fields is not public. */ |
1151 | int non_public_fields; | |
c906108c | 1152 | |
c5aa993b JM |
1153 | /* Member function fields array, entries are allocated in the order they |
1154 | are encountered in the object file. */ | |
1155 | struct nextfnfield | |
1156 | { | |
1157 | struct nextfnfield *next; | |
1158 | struct fn_field fnfield; | |
1159 | } | |
1160 | *fnfields; | |
c906108c | 1161 | |
c5aa993b JM |
1162 | /* Member function fieldlist array, contains name of possibly overloaded |
1163 | member function, number of overloaded member functions and a pointer | |
1164 | to the head of the member function field chain. */ | |
1165 | struct fnfieldlist | |
1166 | { | |
15d034d0 | 1167 | const char *name; |
c5aa993b JM |
1168 | int length; |
1169 | struct nextfnfield *head; | |
1170 | } | |
1171 | *fnfieldlists; | |
c906108c | 1172 | |
c5aa993b JM |
1173 | /* Number of entries in the fnfieldlists array. */ |
1174 | int nfnfields; | |
98751a41 JK |
1175 | |
1176 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1177 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1178 | struct typedef_field_list | |
1179 | { | |
1180 | struct typedef_field field; | |
1181 | struct typedef_field_list *next; | |
1182 | } | |
1183 | *typedef_field_list; | |
1184 | unsigned typedef_field_list_count; | |
c5aa993b | 1185 | }; |
c906108c | 1186 | |
10b3939b DJ |
1187 | /* One item on the queue of compilation units to read in full symbols |
1188 | for. */ | |
1189 | struct dwarf2_queue_item | |
1190 | { | |
1191 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1192 | enum language pretend_language; |
10b3939b DJ |
1193 | struct dwarf2_queue_item *next; |
1194 | }; | |
1195 | ||
1196 | /* The current queue. */ | |
1197 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1198 | ||
ae038cb0 DJ |
1199 | /* Loaded secondary compilation units are kept in memory until they |
1200 | have not been referenced for the processing of this many | |
1201 | compilation units. Set this to zero to disable caching. Cache | |
1202 | sizes of up to at least twenty will improve startup time for | |
1203 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1204 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1205 | static void |
1206 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1207 | struct cmd_list_element *c, const char *value) | |
1208 | { | |
3e43a32a MS |
1209 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1210 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1211 | value); |
1212 | } | |
1213 | ||
ae038cb0 | 1214 | |
0963b4bd | 1215 | /* Various complaints about symbol reading that don't abort the process. */ |
c906108c | 1216 | |
4d3c2250 KB |
1217 | static void |
1218 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2e276125 | 1219 | { |
4d3c2250 | 1220 | complaint (&symfile_complaints, |
e2e0b3e5 | 1221 | _("statement list doesn't fit in .debug_line section")); |
4d3c2250 KB |
1222 | } |
1223 | ||
25e43795 DJ |
1224 | static void |
1225 | dwarf2_debug_line_missing_file_complaint (void) | |
1226 | { | |
1227 | complaint (&symfile_complaints, | |
1228 | _(".debug_line section has line data without a file")); | |
1229 | } | |
1230 | ||
59205f5a JB |
1231 | static void |
1232 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1233 | { | |
1234 | complaint (&symfile_complaints, | |
3e43a32a MS |
1235 | _(".debug_line section has line " |
1236 | "program sequence without an end")); | |
59205f5a JB |
1237 | } |
1238 | ||
4d3c2250 KB |
1239 | static void |
1240 | dwarf2_complex_location_expr_complaint (void) | |
2e276125 | 1241 | { |
e2e0b3e5 | 1242 | complaint (&symfile_complaints, _("location expression too complex")); |
4d3c2250 KB |
1243 | } |
1244 | ||
4d3c2250 KB |
1245 | static void |
1246 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1247 | int arg3) | |
2e276125 | 1248 | { |
4d3c2250 | 1249 | complaint (&symfile_complaints, |
3e43a32a MS |
1250 | _("const value length mismatch for '%s', got %d, expected %d"), |
1251 | arg1, arg2, arg3); | |
4d3c2250 KB |
1252 | } |
1253 | ||
1254 | static void | |
f664829e | 1255 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) |
2e276125 | 1256 | { |
4d3c2250 | 1257 | complaint (&symfile_complaints, |
f664829e DE |
1258 | _("debug info runs off end of %s section" |
1259 | " [in module %s]"), | |
1260 | section->asection->name, | |
1261 | bfd_get_filename (section->asection->owner)); | |
4d3c2250 KB |
1262 | } |
1263 | ||
1264 | static void | |
1265 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
8e19ed76 | 1266 | { |
4d3c2250 | 1267 | complaint (&symfile_complaints, |
3e43a32a MS |
1268 | _("macro debug info contains a " |
1269 | "malformed macro definition:\n`%s'"), | |
4d3c2250 KB |
1270 | arg1); |
1271 | } | |
1272 | ||
1273 | static void | |
1274 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
8b2dbe47 | 1275 | { |
4d3c2250 | 1276 | complaint (&symfile_complaints, |
3e43a32a MS |
1277 | _("invalid attribute class or form for '%s' in '%s'"), |
1278 | arg1, arg2); | |
4d3c2250 | 1279 | } |
c906108c | 1280 | |
c906108c SS |
1281 | /* local function prototypes */ |
1282 | ||
4efb68b1 | 1283 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1284 | |
918dd910 JK |
1285 | static void dwarf2_find_base_address (struct die_info *die, |
1286 | struct dwarf2_cu *cu); | |
1287 | ||
0018ea6f DE |
1288 | static struct partial_symtab *create_partial_symtab |
1289 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1290 | ||
c67a9c90 | 1291 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1292 | |
72bf9492 DJ |
1293 | static void scan_partial_symbols (struct partial_die_info *, |
1294 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1295 | int, struct dwarf2_cu *); |
c906108c | 1296 | |
72bf9492 DJ |
1297 | static void add_partial_symbol (struct partial_die_info *, |
1298 | struct dwarf2_cu *); | |
63d06c5c | 1299 | |
72bf9492 DJ |
1300 | static void add_partial_namespace (struct partial_die_info *pdi, |
1301 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1302 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 1303 | |
5d7cb8df JK |
1304 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
1305 | CORE_ADDR *highpc, int need_pc, | |
1306 | struct dwarf2_cu *cu); | |
1307 | ||
72bf9492 DJ |
1308 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1309 | struct dwarf2_cu *cu); | |
91c24f0a | 1310 | |
bc30ff58 JB |
1311 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1312 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1313 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1314 | |
257e7a09 YQ |
1315 | static void dwarf2_read_symtab (struct partial_symtab *, |
1316 | struct objfile *); | |
c906108c | 1317 | |
a14ed312 | 1318 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1319 | |
433df2d4 DE |
1320 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1321 | (const struct abbrev_table *, unsigned int); | |
1322 | ||
1323 | static struct abbrev_table *abbrev_table_read_table | |
1324 | (struct dwarf2_section_info *, sect_offset); | |
1325 | ||
1326 | static void abbrev_table_free (struct abbrev_table *); | |
1327 | ||
f4dc4d17 DE |
1328 | static void abbrev_table_free_cleanup (void *); |
1329 | ||
dee91e82 DE |
1330 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1331 | struct dwarf2_section_info *); | |
c906108c | 1332 | |
f3dd6933 | 1333 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1334 | |
d521ce57 | 1335 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1336 | |
dee91e82 | 1337 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1338 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1339 | |
d521ce57 TT |
1340 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1341 | struct partial_die_info *, | |
1342 | struct abbrev_info *, | |
1343 | unsigned int, | |
1344 | const gdb_byte *); | |
c906108c | 1345 | |
36586728 | 1346 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1347 | struct dwarf2_cu *); |
72bf9492 DJ |
1348 | |
1349 | static void fixup_partial_die (struct partial_die_info *, | |
1350 | struct dwarf2_cu *); | |
1351 | ||
d521ce57 TT |
1352 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1353 | struct attribute *, struct attr_abbrev *, | |
1354 | const gdb_byte *); | |
a8329558 | 1355 | |
a1855c1d | 1356 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1357 | |
a1855c1d | 1358 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1359 | |
a1855c1d | 1360 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1361 | |
a1855c1d | 1362 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1363 | |
a1855c1d | 1364 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1365 | |
d521ce57 | 1366 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1367 | unsigned int *); |
c906108c | 1368 | |
d521ce57 | 1369 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1370 | |
1371 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1372 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1373 | unsigned int *, unsigned int *); |
613e1657 | 1374 | |
d521ce57 TT |
1375 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1376 | const struct comp_unit_head *, | |
c764a876 DE |
1377 | unsigned int *); |
1378 | ||
d521ce57 | 1379 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1380 | |
f4dc4d17 DE |
1381 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1382 | sect_offset); | |
1383 | ||
d521ce57 | 1384 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1385 | |
d521ce57 | 1386 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1387 | |
d521ce57 TT |
1388 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1389 | const struct comp_unit_head *, | |
1390 | unsigned int *); | |
4bdf3d34 | 1391 | |
d521ce57 | 1392 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1393 | |
d521ce57 | 1394 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1395 | |
d521ce57 | 1396 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1397 | |
d521ce57 TT |
1398 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1399 | const gdb_byte *, | |
3019eac3 DE |
1400 | unsigned int *); |
1401 | ||
d521ce57 TT |
1402 | static const char *read_str_index (const struct die_reader_specs *reader, |
1403 | struct dwarf2_cu *cu, ULONGEST str_index); | |
3019eac3 | 1404 | |
e142c38c | 1405 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1406 | |
e142c38c DJ |
1407 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1408 | struct dwarf2_cu *); | |
c906108c | 1409 | |
348e048f | 1410 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1411 | unsigned int); |
348e048f | 1412 | |
05cf31d1 JB |
1413 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1414 | struct dwarf2_cu *cu); | |
1415 | ||
e142c38c | 1416 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1417 | |
e142c38c | 1418 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1419 | struct dwarf2_cu **); |
63d06c5c | 1420 | |
debd256d JB |
1421 | static void free_line_header (struct line_header *lh); |
1422 | ||
3019eac3 DE |
1423 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1424 | struct dwarf2_cu *cu); | |
debd256d | 1425 | |
f3f5162e DE |
1426 | static void dwarf_decode_lines (struct line_header *, const char *, |
1427 | struct dwarf2_cu *, struct partial_symtab *, | |
1428 | int); | |
c906108c | 1429 | |
d521ce57 | 1430 | static void dwarf2_start_subfile (const char *, const char *, const char *); |
c906108c | 1431 | |
f4dc4d17 | 1432 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
15d034d0 | 1433 | const char *, const char *, CORE_ADDR); |
f4dc4d17 | 1434 | |
a14ed312 | 1435 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1436 | struct dwarf2_cu *); |
c906108c | 1437 | |
34eaf542 TT |
1438 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1439 | struct dwarf2_cu *, struct symbol *); | |
1440 | ||
a14ed312 | 1441 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
e7c27a73 | 1442 | struct dwarf2_cu *); |
c906108c | 1443 | |
98bfdba5 PA |
1444 | static void dwarf2_const_value_attr (struct attribute *attr, |
1445 | struct type *type, | |
1446 | const char *name, | |
1447 | struct obstack *obstack, | |
12df843f | 1448 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1449 | const gdb_byte **bytes, |
98bfdba5 | 1450 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1451 | |
e7c27a73 | 1452 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1453 | |
b4ba55a1 JB |
1454 | static int need_gnat_info (struct dwarf2_cu *); |
1455 | ||
3e43a32a MS |
1456 | static struct type *die_descriptive_type (struct die_info *, |
1457 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1458 | |
1459 | static void set_descriptive_type (struct type *, struct die_info *, | |
1460 | struct dwarf2_cu *); | |
1461 | ||
e7c27a73 DJ |
1462 | static struct type *die_containing_type (struct die_info *, |
1463 | struct dwarf2_cu *); | |
c906108c | 1464 | |
673bfd45 DE |
1465 | static struct type *lookup_die_type (struct die_info *, struct attribute *, |
1466 | struct dwarf2_cu *); | |
c906108c | 1467 | |
f792889a | 1468 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1469 | |
673bfd45 DE |
1470 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1471 | ||
0d5cff50 | 1472 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1473 | |
6e70227d | 1474 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1475 | const char *suffix, int physname, |
1476 | struct dwarf2_cu *cu); | |
63d06c5c | 1477 | |
e7c27a73 | 1478 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1479 | |
348e048f DE |
1480 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1481 | ||
e7c27a73 | 1482 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1483 | |
e7c27a73 | 1484 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1485 | |
96408a79 SA |
1486 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1487 | ||
ff013f42 JK |
1488 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1489 | struct dwarf2_cu *, struct partial_symtab *); | |
1490 | ||
a14ed312 | 1491 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1492 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1493 | struct partial_symtab *); | |
c906108c | 1494 | |
fae299cd DC |
1495 | static void get_scope_pc_bounds (struct die_info *, |
1496 | CORE_ADDR *, CORE_ADDR *, | |
1497 | struct dwarf2_cu *); | |
1498 | ||
801e3a5b JB |
1499 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1500 | CORE_ADDR, struct dwarf2_cu *); | |
1501 | ||
a14ed312 | 1502 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1503 | struct dwarf2_cu *); |
c906108c | 1504 | |
a14ed312 | 1505 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1506 | struct type *, struct dwarf2_cu *); |
c906108c | 1507 | |
a14ed312 | 1508 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1509 | struct die_info *, struct type *, |
e7c27a73 | 1510 | struct dwarf2_cu *); |
c906108c | 1511 | |
a14ed312 | 1512 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1513 | struct type *, |
1514 | struct dwarf2_cu *); | |
c906108c | 1515 | |
134d01f1 | 1516 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1517 | |
e7c27a73 | 1518 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1519 | |
e7c27a73 | 1520 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1521 | |
5d7cb8df JK |
1522 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1523 | ||
27aa8d6a SW |
1524 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1525 | ||
f55ee35c JK |
1526 | static struct type *read_module_type (struct die_info *die, |
1527 | struct dwarf2_cu *cu); | |
1528 | ||
38d518c9 | 1529 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1530 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1531 | |
134d01f1 | 1532 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1533 | |
e7c27a73 | 1534 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1535 | |
6e70227d | 1536 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1537 | struct dwarf2_cu *); |
1538 | ||
bf6af496 | 1539 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1540 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1541 | struct die_info *); |
639d11d3 | 1542 | |
dee91e82 | 1543 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1544 | const gdb_byte *info_ptr, |
1545 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1546 | struct die_info *parent); |
1547 | ||
d521ce57 TT |
1548 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1549 | struct die_info **, const gdb_byte *, | |
1550 | int *, int); | |
3019eac3 | 1551 | |
d521ce57 TT |
1552 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1553 | struct die_info **, const gdb_byte *, | |
1554 | int *); | |
93311388 | 1555 | |
e7c27a73 | 1556 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1557 | |
15d034d0 TT |
1558 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1559 | struct obstack *); | |
71c25dea | 1560 | |
15d034d0 | 1561 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1562 | |
15d034d0 | 1563 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1564 | struct die_info *die, |
1565 | struct dwarf2_cu *cu); | |
1566 | ||
ca69b9e6 DE |
1567 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1568 | struct dwarf2_cu *cu); | |
1569 | ||
e142c38c | 1570 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1571 | struct dwarf2_cu **); |
9219021c | 1572 | |
f39c6ffd | 1573 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1574 | |
f39c6ffd | 1575 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1576 | |
f39c6ffd | 1577 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1578 | |
a14ed312 | 1579 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1580 | |
f39c6ffd | 1581 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1582 | |
f9aca02d | 1583 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1584 | |
d97bc12b DE |
1585 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1586 | ||
1587 | static void dump_die_for_error (struct die_info *); | |
1588 | ||
1589 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1590 | struct die_info *); | |
c906108c | 1591 | |
d97bc12b | 1592 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1593 | |
51545339 | 1594 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1595 | struct dwarf2_cu *); |
c906108c | 1596 | |
93311388 DE |
1597 | static int is_ref_attr (struct attribute *); |
1598 | ||
b64f50a1 | 1599 | static sect_offset dwarf2_get_ref_die_offset (struct attribute *); |
c906108c | 1600 | |
43bbcdc2 | 1601 | static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int); |
a02abb62 | 1602 | |
348e048f DE |
1603 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
1604 | struct attribute *, | |
1605 | struct dwarf2_cu **); | |
1606 | ||
10b3939b DJ |
1607 | static struct die_info *follow_die_ref (struct die_info *, |
1608 | struct attribute *, | |
f2f0e013 | 1609 | struct dwarf2_cu **); |
c906108c | 1610 | |
348e048f DE |
1611 | static struct die_info *follow_die_sig (struct die_info *, |
1612 | struct attribute *, | |
1613 | struct dwarf2_cu **); | |
1614 | ||
ac9ec31b DE |
1615 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1616 | struct dwarf2_cu *); | |
1617 | ||
1618 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
1619 | struct attribute *, | |
1620 | struct dwarf2_cu *); | |
1621 | ||
e5fe5e75 | 1622 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1623 | |
52dc124a | 1624 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1625 | |
f4dc4d17 | 1626 | static struct type_unit_group *get_type_unit_group |
094b34ac | 1627 | (struct dwarf2_cu *, struct attribute *); |
f4dc4d17 DE |
1628 | |
1629 | static void build_type_unit_groups (die_reader_func_ftype *, void *); | |
1630 | ||
c906108c SS |
1631 | /* memory allocation interface */ |
1632 | ||
7b5a2f43 | 1633 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1634 | |
b60c80d6 | 1635 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1636 | |
09262596 | 1637 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
15d034d0 | 1638 | const char *, int); |
2e276125 | 1639 | |
8e19ed76 PS |
1640 | static int attr_form_is_block (struct attribute *); |
1641 | ||
3690dd37 JB |
1642 | static int attr_form_is_section_offset (struct attribute *); |
1643 | ||
1644 | static int attr_form_is_constant (struct attribute *); | |
1645 | ||
8cf6f0b1 TT |
1646 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1647 | struct dwarf2_loclist_baton *baton, | |
1648 | struct attribute *attr); | |
1649 | ||
93e7bd98 DJ |
1650 | static void dwarf2_symbol_mark_computed (struct attribute *attr, |
1651 | struct symbol *sym, | |
f1e6e072 TT |
1652 | struct dwarf2_cu *cu, |
1653 | int is_block); | |
4c2df51b | 1654 | |
d521ce57 TT |
1655 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1656 | const gdb_byte *info_ptr, | |
1657 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1658 | |
72bf9492 DJ |
1659 | static void free_stack_comp_unit (void *); |
1660 | ||
72bf9492 DJ |
1661 | static hashval_t partial_die_hash (const void *item); |
1662 | ||
1663 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1664 | ||
ae038cb0 | 1665 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1666 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1667 | |
9816fde3 | 1668 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1669 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1670 | |
1671 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1672 | struct die_info *comp_unit_die, |
1673 | enum language pretend_language); | |
93311388 | 1674 | |
68dc6402 | 1675 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1676 | |
1677 | static void free_cached_comp_units (void *); | |
1678 | ||
1679 | static void age_cached_comp_units (void); | |
1680 | ||
dee91e82 | 1681 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1682 | |
f792889a DJ |
1683 | static struct type *set_die_type (struct die_info *, struct type *, |
1684 | struct dwarf2_cu *); | |
1c379e20 | 1685 | |
ae038cb0 DJ |
1686 | static void create_all_comp_units (struct objfile *); |
1687 | ||
0e50663e | 1688 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1689 | |
95554aad TT |
1690 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1691 | enum language); | |
10b3939b | 1692 | |
95554aad TT |
1693 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1694 | enum language); | |
10b3939b | 1695 | |
f4dc4d17 DE |
1696 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1697 | enum language); | |
1698 | ||
10b3939b DJ |
1699 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1700 | struct dwarf2_per_cu_data *); | |
1701 | ||
ae038cb0 DJ |
1702 | static void dwarf2_mark (struct dwarf2_cu *); |
1703 | ||
1704 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1705 | ||
b64f50a1 | 1706 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1707 | struct dwarf2_per_cu_data *); |
673bfd45 | 1708 | |
f792889a | 1709 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1710 | |
9291a0cd TT |
1711 | static void dwarf2_release_queue (void *dummy); |
1712 | ||
95554aad TT |
1713 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1714 | enum language pretend_language); | |
1715 | ||
1716 | static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
1717 | struct dwarf2_per_cu_data *per_cu, | |
1718 | enum language pretend_language); | |
9291a0cd | 1719 | |
a0f42c21 | 1720 | static void process_queue (void); |
9291a0cd TT |
1721 | |
1722 | static void find_file_and_directory (struct die_info *die, | |
1723 | struct dwarf2_cu *cu, | |
15d034d0 | 1724 | const char **name, const char **comp_dir); |
9291a0cd TT |
1725 | |
1726 | static char *file_full_name (int file, struct line_header *lh, | |
1727 | const char *comp_dir); | |
1728 | ||
d521ce57 | 1729 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1730 | (struct comp_unit_head *header, |
1731 | struct dwarf2_section_info *section, | |
d521ce57 | 1732 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1733 | int is_debug_types_section); |
1734 | ||
fd820528 | 1735 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1736 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1737 | int use_existing_cu, int keep, | |
3019eac3 DE |
1738 | die_reader_func_ftype *die_reader_func, void *data); |
1739 | ||
dee91e82 DE |
1740 | static void init_cutu_and_read_dies_simple |
1741 | (struct dwarf2_per_cu_data *this_cu, | |
1742 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1743 | |
673bfd45 | 1744 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1745 | |
3019eac3 DE |
1746 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1747 | ||
1748 | static struct dwo_unit *lookup_dwo_comp_unit | |
a1855c1d | 1749 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1750 | |
1751 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1752 | (struct signatured_type *, const char *, const char *); |
3019eac3 DE |
1753 | |
1754 | static void free_dwo_file_cleanup (void *); | |
1755 | ||
95554aad TT |
1756 | static void process_cu_includes (void); |
1757 | ||
1b80a9fa JK |
1758 | static void check_producer (struct dwarf2_cu *cu); |
1759 | ||
9291a0cd TT |
1760 | #if WORDS_BIGENDIAN |
1761 | ||
1762 | /* Convert VALUE between big- and little-endian. */ | |
1763 | static offset_type | |
1764 | byte_swap (offset_type value) | |
1765 | { | |
1766 | offset_type result; | |
1767 | ||
1768 | result = (value & 0xff) << 24; | |
1769 | result |= (value & 0xff00) << 8; | |
1770 | result |= (value & 0xff0000) >> 8; | |
1771 | result |= (value & 0xff000000) >> 24; | |
1772 | return result; | |
1773 | } | |
1774 | ||
1775 | #define MAYBE_SWAP(V) byte_swap (V) | |
1776 | ||
1777 | #else | |
1778 | #define MAYBE_SWAP(V) (V) | |
1779 | #endif /* WORDS_BIGENDIAN */ | |
1780 | ||
1781 | /* The suffix for an index file. */ | |
1782 | #define INDEX_SUFFIX ".gdb-index" | |
1783 | ||
c906108c | 1784 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1785 | information and return true if we have enough to do something. |
1786 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1787 | ELF names are used. */ | |
c906108c SS |
1788 | |
1789 | int | |
251d32d9 TG |
1790 | dwarf2_has_info (struct objfile *objfile, |
1791 | const struct dwarf2_debug_sections *names) | |
c906108c | 1792 | { |
be391dca TT |
1793 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1794 | if (!dwarf2_per_objfile) | |
1795 | { | |
1796 | /* Initialize per-objfile state. */ | |
1797 | struct dwarf2_per_objfile *data | |
1798 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1799 | |
be391dca TT |
1800 | memset (data, 0, sizeof (*data)); |
1801 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1802 | dwarf2_per_objfile = data; | |
6502dd73 | 1803 | |
251d32d9 TG |
1804 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1805 | (void *) names); | |
be391dca TT |
1806 | dwarf2_per_objfile->objfile = objfile; |
1807 | } | |
1808 | return (dwarf2_per_objfile->info.asection != NULL | |
1809 | && dwarf2_per_objfile->abbrev.asection != NULL); | |
c906108c SS |
1810 | } |
1811 | ||
251d32d9 TG |
1812 | /* When loading sections, we look either for uncompressed section or for |
1813 | compressed section names. */ | |
233a11ab CS |
1814 | |
1815 | static int | |
251d32d9 TG |
1816 | section_is_p (const char *section_name, |
1817 | const struct dwarf2_section_names *names) | |
233a11ab | 1818 | { |
251d32d9 TG |
1819 | if (names->normal != NULL |
1820 | && strcmp (section_name, names->normal) == 0) | |
1821 | return 1; | |
1822 | if (names->compressed != NULL | |
1823 | && strcmp (section_name, names->compressed) == 0) | |
1824 | return 1; | |
1825 | return 0; | |
233a11ab CS |
1826 | } |
1827 | ||
c906108c SS |
1828 | /* This function is mapped across the sections and remembers the |
1829 | offset and size of each of the debugging sections we are interested | |
1830 | in. */ | |
1831 | ||
1832 | static void | |
251d32d9 | 1833 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 1834 | { |
251d32d9 | 1835 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 1836 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
1837 | |
1838 | if (vnames == NULL) | |
1839 | names = &dwarf2_elf_names; | |
1840 | else | |
1841 | names = (const struct dwarf2_debug_sections *) vnames; | |
1842 | ||
dc7650b8 JK |
1843 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1844 | { | |
1845 | } | |
1846 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 1847 | { |
dce234bc PP |
1848 | dwarf2_per_objfile->info.asection = sectp; |
1849 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); | |
c906108c | 1850 | } |
251d32d9 | 1851 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 1852 | { |
dce234bc PP |
1853 | dwarf2_per_objfile->abbrev.asection = sectp; |
1854 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 1855 | } |
251d32d9 | 1856 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 1857 | { |
dce234bc PP |
1858 | dwarf2_per_objfile->line.asection = sectp; |
1859 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); | |
c906108c | 1860 | } |
251d32d9 | 1861 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 1862 | { |
dce234bc PP |
1863 | dwarf2_per_objfile->loc.asection = sectp; |
1864 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); | |
c906108c | 1865 | } |
251d32d9 | 1866 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 1867 | { |
dce234bc PP |
1868 | dwarf2_per_objfile->macinfo.asection = sectp; |
1869 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 1870 | } |
cf2c3c16 TT |
1871 | else if (section_is_p (sectp->name, &names->macro)) |
1872 | { | |
1873 | dwarf2_per_objfile->macro.asection = sectp; | |
1874 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); | |
1875 | } | |
251d32d9 | 1876 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 1877 | { |
dce234bc PP |
1878 | dwarf2_per_objfile->str.asection = sectp; |
1879 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); | |
c906108c | 1880 | } |
3019eac3 DE |
1881 | else if (section_is_p (sectp->name, &names->addr)) |
1882 | { | |
1883 | dwarf2_per_objfile->addr.asection = sectp; | |
1884 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); | |
1885 | } | |
251d32d9 | 1886 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 1887 | { |
dce234bc PP |
1888 | dwarf2_per_objfile->frame.asection = sectp; |
1889 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1890 | } |
251d32d9 | 1891 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 1892 | { |
dc7650b8 JK |
1893 | dwarf2_per_objfile->eh_frame.asection = sectp; |
1894 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1895 | } |
251d32d9 | 1896 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 1897 | { |
dce234bc PP |
1898 | dwarf2_per_objfile->ranges.asection = sectp; |
1899 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 1900 | } |
251d32d9 | 1901 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 1902 | { |
8b70b953 TT |
1903 | struct dwarf2_section_info type_section; |
1904 | ||
1905 | memset (&type_section, 0, sizeof (type_section)); | |
1906 | type_section.asection = sectp; | |
1907 | type_section.size = bfd_get_section_size (sectp); | |
1908 | ||
1909 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
1910 | &type_section); | |
348e048f | 1911 | } |
251d32d9 | 1912 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd TT |
1913 | { |
1914 | dwarf2_per_objfile->gdb_index.asection = sectp; | |
1915 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); | |
1916 | } | |
dce234bc | 1917 | |
72dca2f5 FR |
1918 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
1919 | && bfd_section_vma (abfd, sectp) == 0) | |
1920 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
1921 | } |
1922 | ||
fceca515 DE |
1923 | /* A helper function that decides whether a section is empty, |
1924 | or not present. */ | |
9e0ac564 TT |
1925 | |
1926 | static int | |
1927 | dwarf2_section_empty_p (struct dwarf2_section_info *info) | |
1928 | { | |
1929 | return info->asection == NULL || info->size == 0; | |
1930 | } | |
1931 | ||
3019eac3 DE |
1932 | /* Read the contents of the section INFO. |
1933 | OBJFILE is the main object file, but not necessarily the file where | |
1934 | the section comes from. E.g., for DWO files INFO->asection->owner | |
1935 | is the bfd of the DWO file. | |
dce234bc | 1936 | If the section is compressed, uncompress it before returning. */ |
c906108c | 1937 | |
dce234bc PP |
1938 | static void |
1939 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 1940 | { |
dce234bc | 1941 | asection *sectp = info->asection; |
3019eac3 | 1942 | bfd *abfd; |
dce234bc PP |
1943 | gdb_byte *buf, *retbuf; |
1944 | unsigned char header[4]; | |
c906108c | 1945 | |
be391dca TT |
1946 | if (info->readin) |
1947 | return; | |
dce234bc | 1948 | info->buffer = NULL; |
be391dca | 1949 | info->readin = 1; |
188dd5d6 | 1950 | |
9e0ac564 | 1951 | if (dwarf2_section_empty_p (info)) |
dce234bc | 1952 | return; |
c906108c | 1953 | |
3019eac3 DE |
1954 | abfd = sectp->owner; |
1955 | ||
4bf44c1c TT |
1956 | /* If the section has relocations, we must read it ourselves. |
1957 | Otherwise we attach it to the BFD. */ | |
1958 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 1959 | { |
d521ce57 | 1960 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 1961 | return; |
dce234bc | 1962 | } |
dce234bc | 1963 | |
4bf44c1c TT |
1964 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
1965 | info->buffer = buf; | |
dce234bc PP |
1966 | |
1967 | /* When debugging .o files, we may need to apply relocations; see | |
1968 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
1969 | We never compress sections in .o files, so we only need to | |
1970 | try this when the section is not compressed. */ | |
ac8035ab | 1971 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
1972 | if (retbuf != NULL) |
1973 | { | |
1974 | info->buffer = retbuf; | |
1975 | return; | |
1976 | } | |
1977 | ||
1978 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 | |
1979 | || bfd_bread (buf, info->size, abfd) != info->size) | |
1980 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), | |
1981 | bfd_get_filename (abfd)); | |
1982 | } | |
1983 | ||
9e0ac564 TT |
1984 | /* A helper function that returns the size of a section in a safe way. |
1985 | If you are positive that the section has been read before using the | |
1986 | size, then it is safe to refer to the dwarf2_section_info object's | |
1987 | "size" field directly. In other cases, you must call this | |
1988 | function, because for compressed sections the size field is not set | |
1989 | correctly until the section has been read. */ | |
1990 | ||
1991 | static bfd_size_type | |
1992 | dwarf2_section_size (struct objfile *objfile, | |
1993 | struct dwarf2_section_info *info) | |
1994 | { | |
1995 | if (!info->readin) | |
1996 | dwarf2_read_section (objfile, info); | |
1997 | return info->size; | |
1998 | } | |
1999 | ||
dce234bc | 2000 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2001 | SECTION_NAME. */ |
af34e669 | 2002 | |
dce234bc | 2003 | void |
3017a003 TG |
2004 | dwarf2_get_section_info (struct objfile *objfile, |
2005 | enum dwarf2_section_enum sect, | |
d521ce57 | 2006 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2007 | bfd_size_type *sizep) |
2008 | { | |
2009 | struct dwarf2_per_objfile *data | |
2010 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
2011 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
2012 | |
2013 | /* We may see an objfile without any DWARF, in which case we just | |
2014 | return nothing. */ | |
2015 | if (data == NULL) | |
2016 | { | |
2017 | *sectp = NULL; | |
2018 | *bufp = NULL; | |
2019 | *sizep = 0; | |
2020 | return; | |
2021 | } | |
3017a003 TG |
2022 | switch (sect) |
2023 | { | |
2024 | case DWARF2_DEBUG_FRAME: | |
2025 | info = &data->frame; | |
2026 | break; | |
2027 | case DWARF2_EH_FRAME: | |
2028 | info = &data->eh_frame; | |
2029 | break; | |
2030 | default: | |
2031 | gdb_assert_not_reached ("unexpected section"); | |
2032 | } | |
dce234bc | 2033 | |
9e0ac564 | 2034 | dwarf2_read_section (objfile, info); |
dce234bc PP |
2035 | |
2036 | *sectp = info->asection; | |
2037 | *bufp = info->buffer; | |
2038 | *sizep = info->size; | |
2039 | } | |
2040 | ||
36586728 TT |
2041 | /* A helper function to find the sections for a .dwz file. */ |
2042 | ||
2043 | static void | |
2044 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2045 | { | |
2046 | struct dwz_file *dwz_file = arg; | |
2047 | ||
2048 | /* Note that we only support the standard ELF names, because .dwz | |
2049 | is ELF-only (at the time of writing). */ | |
2050 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2051 | { | |
2052 | dwz_file->abbrev.asection = sectp; | |
2053 | dwz_file->abbrev.size = bfd_get_section_size (sectp); | |
2054 | } | |
2055 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2056 | { | |
2057 | dwz_file->info.asection = sectp; | |
2058 | dwz_file->info.size = bfd_get_section_size (sectp); | |
2059 | } | |
2060 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2061 | { | |
2062 | dwz_file->str.asection = sectp; | |
2063 | dwz_file->str.size = bfd_get_section_size (sectp); | |
2064 | } | |
2065 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2066 | { | |
2067 | dwz_file->line.asection = sectp; | |
2068 | dwz_file->line.size = bfd_get_section_size (sectp); | |
2069 | } | |
2070 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2071 | { | |
2072 | dwz_file->macro.asection = sectp; | |
2073 | dwz_file->macro.size = bfd_get_section_size (sectp); | |
2074 | } | |
2ec9a5e0 TT |
2075 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2076 | { | |
2077 | dwz_file->gdb_index.asection = sectp; | |
2078 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); | |
2079 | } | |
36586728 TT |
2080 | } |
2081 | ||
2082 | /* Open the separate '.dwz' debug file, if needed. Error if the file | |
2083 | cannot be found. */ | |
2084 | ||
2085 | static struct dwz_file * | |
2086 | dwarf2_get_dwz_file (void) | |
2087 | { | |
2088 | bfd *abfd, *dwz_bfd; | |
2089 | asection *section; | |
2090 | gdb_byte *data; | |
2091 | struct cleanup *cleanup; | |
2092 | const char *filename; | |
2093 | struct dwz_file *result; | |
2094 | ||
2095 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2096 | return dwarf2_per_objfile->dwz_file; | |
2097 | ||
2098 | abfd = dwarf2_per_objfile->objfile->obfd; | |
2099 | section = bfd_get_section_by_name (abfd, ".gnu_debugaltlink"); | |
2100 | if (section == NULL) | |
2101 | error (_("could not find '.gnu_debugaltlink' section")); | |
2102 | if (!bfd_malloc_and_get_section (abfd, section, &data)) | |
2103 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2104 | bfd_errmsg (bfd_get_error ())); | |
2105 | cleanup = make_cleanup (xfree, data); | |
2106 | ||
f9d83a0b | 2107 | filename = (const char *) data; |
36586728 TT |
2108 | if (!IS_ABSOLUTE_PATH (filename)) |
2109 | { | |
2110 | char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name); | |
2111 | char *rel; | |
2112 | ||
2113 | make_cleanup (xfree, abs); | |
2114 | abs = ldirname (abs); | |
2115 | make_cleanup (xfree, abs); | |
2116 | ||
2117 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2118 | make_cleanup (xfree, rel); | |
2119 | filename = rel; | |
2120 | } | |
2121 | ||
2122 | /* The format is just a NUL-terminated file name, followed by the | |
2123 | build-id. For now, though, we ignore the build-id. */ | |
2124 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); | |
2125 | if (dwz_bfd == NULL) | |
2126 | error (_("could not read '%s': %s"), filename, | |
2127 | bfd_errmsg (bfd_get_error ())); | |
2128 | ||
2129 | if (!bfd_check_format (dwz_bfd, bfd_object)) | |
2130 | { | |
2131 | gdb_bfd_unref (dwz_bfd); | |
2132 | error (_("file '%s' was not usable: %s"), filename, | |
2133 | bfd_errmsg (bfd_get_error ())); | |
2134 | } | |
2135 | ||
2136 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, | |
2137 | struct dwz_file); | |
2138 | result->dwz_bfd = dwz_bfd; | |
2139 | ||
2140 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2141 | ||
2142 | do_cleanups (cleanup); | |
2143 | ||
8d2cc612 | 2144 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2145 | return result; |
2146 | } | |
9291a0cd | 2147 | \f |
7b9f3c50 DE |
2148 | /* DWARF quick_symbols_functions support. */ |
2149 | ||
2150 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2151 | unique line tables, so we maintain a separate table of all .debug_line | |
2152 | derived entries to support the sharing. | |
2153 | All the quick functions need is the list of file names. We discard the | |
2154 | line_header when we're done and don't need to record it here. */ | |
2155 | struct quick_file_names | |
2156 | { | |
094b34ac DE |
2157 | /* The data used to construct the hash key. */ |
2158 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2159 | |
2160 | /* The number of entries in file_names, real_names. */ | |
2161 | unsigned int num_file_names; | |
2162 | ||
2163 | /* The file names from the line table, after being run through | |
2164 | file_full_name. */ | |
2165 | const char **file_names; | |
2166 | ||
2167 | /* The file names from the line table after being run through | |
2168 | gdb_realpath. These are computed lazily. */ | |
2169 | const char **real_names; | |
2170 | }; | |
2171 | ||
2172 | /* When using the index (and thus not using psymtabs), each CU has an | |
2173 | object of this type. This is used to hold information needed by | |
2174 | the various "quick" methods. */ | |
2175 | struct dwarf2_per_cu_quick_data | |
2176 | { | |
2177 | /* The file table. This can be NULL if there was no file table | |
2178 | or it's currently not read in. | |
2179 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2180 | struct quick_file_names *file_names; | |
2181 | ||
2182 | /* The corresponding symbol table. This is NULL if symbols for this | |
2183 | CU have not yet been read. */ | |
2184 | struct symtab *symtab; | |
2185 | ||
2186 | /* A temporary mark bit used when iterating over all CUs in | |
2187 | expand_symtabs_matching. */ | |
2188 | unsigned int mark : 1; | |
2189 | ||
2190 | /* True if we've tried to read the file table and found there isn't one. | |
2191 | There will be no point in trying to read it again next time. */ | |
2192 | unsigned int no_file_data : 1; | |
2193 | }; | |
2194 | ||
094b34ac DE |
2195 | /* Utility hash function for a stmt_list_hash. */ |
2196 | ||
2197 | static hashval_t | |
2198 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2199 | { | |
2200 | hashval_t v = 0; | |
2201 | ||
2202 | if (stmt_list_hash->dwo_unit != NULL) | |
2203 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2204 | v += stmt_list_hash->line_offset.sect_off; | |
2205 | return v; | |
2206 | } | |
2207 | ||
2208 | /* Utility equality function for a stmt_list_hash. */ | |
2209 | ||
2210 | static int | |
2211 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2212 | const struct stmt_list_hash *rhs) | |
2213 | { | |
2214 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2215 | return 0; | |
2216 | if (lhs->dwo_unit != NULL | |
2217 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2218 | return 0; | |
2219 | ||
2220 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2221 | } | |
2222 | ||
7b9f3c50 DE |
2223 | /* Hash function for a quick_file_names. */ |
2224 | ||
2225 | static hashval_t | |
2226 | hash_file_name_entry (const void *e) | |
2227 | { | |
2228 | const struct quick_file_names *file_data = e; | |
2229 | ||
094b34ac | 2230 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2231 | } |
2232 | ||
2233 | /* Equality function for a quick_file_names. */ | |
2234 | ||
2235 | static int | |
2236 | eq_file_name_entry (const void *a, const void *b) | |
2237 | { | |
2238 | const struct quick_file_names *ea = a; | |
2239 | const struct quick_file_names *eb = b; | |
2240 | ||
094b34ac | 2241 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2242 | } |
2243 | ||
2244 | /* Delete function for a quick_file_names. */ | |
2245 | ||
2246 | static void | |
2247 | delete_file_name_entry (void *e) | |
2248 | { | |
2249 | struct quick_file_names *file_data = e; | |
2250 | int i; | |
2251 | ||
2252 | for (i = 0; i < file_data->num_file_names; ++i) | |
2253 | { | |
2254 | xfree ((void*) file_data->file_names[i]); | |
2255 | if (file_data->real_names) | |
2256 | xfree ((void*) file_data->real_names[i]); | |
2257 | } | |
2258 | ||
2259 | /* The space for the struct itself lives on objfile_obstack, | |
2260 | so we don't free it here. */ | |
2261 | } | |
2262 | ||
2263 | /* Create a quick_file_names hash table. */ | |
2264 | ||
2265 | static htab_t | |
2266 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2267 | { | |
2268 | return htab_create_alloc (nr_initial_entries, | |
2269 | hash_file_name_entry, eq_file_name_entry, | |
2270 | delete_file_name_entry, xcalloc, xfree); | |
2271 | } | |
9291a0cd | 2272 | |
918dd910 JK |
2273 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2274 | have to be created afterwards. You should call age_cached_comp_units after | |
2275 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2276 | ||
2277 | static void | |
2278 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2279 | { | |
3019eac3 | 2280 | if (per_cu->is_debug_types) |
e5fe5e75 | 2281 | load_full_type_unit (per_cu); |
918dd910 | 2282 | else |
95554aad | 2283 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2284 | |
918dd910 | 2285 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2286 | |
2287 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2288 | } |
2289 | ||
a0f42c21 | 2290 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2291 | |
9291a0cd | 2292 | static void |
a0f42c21 | 2293 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2294 | { |
2295 | struct cleanup *back_to; | |
2296 | ||
f4dc4d17 DE |
2297 | /* Skip type_unit_groups, reading the type units they contain |
2298 | is handled elsewhere. */ | |
2299 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2300 | return; | |
2301 | ||
9291a0cd TT |
2302 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2303 | ||
95554aad TT |
2304 | if (dwarf2_per_objfile->using_index |
2305 | ? per_cu->v.quick->symtab == NULL | |
2306 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2307 | { | |
2308 | queue_comp_unit (per_cu, language_minimal); | |
2309 | load_cu (per_cu); | |
2310 | } | |
9291a0cd | 2311 | |
a0f42c21 | 2312 | process_queue (); |
9291a0cd TT |
2313 | |
2314 | /* Age the cache, releasing compilation units that have not | |
2315 | been used recently. */ | |
2316 | age_cached_comp_units (); | |
2317 | ||
2318 | do_cleanups (back_to); | |
2319 | } | |
2320 | ||
2321 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2322 | the objfile from which this CU came. Returns the resulting symbol | |
2323 | table. */ | |
2fdf6df6 | 2324 | |
9291a0cd | 2325 | static struct symtab * |
a0f42c21 | 2326 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2327 | { |
95554aad | 2328 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2329 | if (!per_cu->v.quick->symtab) |
2330 | { | |
2331 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2332 | increment_reading_symtab (); | |
a0f42c21 | 2333 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2334 | process_cu_includes (); |
9291a0cd TT |
2335 | do_cleanups (back_to); |
2336 | } | |
2337 | return per_cu->v.quick->symtab; | |
2338 | } | |
2339 | ||
f4dc4d17 DE |
2340 | /* Return the CU given its index. |
2341 | ||
2342 | This is intended for loops like: | |
2343 | ||
2344 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2345 | + dwarf2_per_objfile->n_type_units); ++i) | |
2346 | { | |
2347 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
2348 | ||
2349 | ...; | |
2350 | } | |
2351 | */ | |
2fdf6df6 | 2352 | |
1fd400ff TT |
2353 | static struct dwarf2_per_cu_data * |
2354 | dw2_get_cu (int index) | |
2355 | { | |
2356 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2357 | { | |
f4dc4d17 | 2358 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2359 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2360 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2361 | } |
2362 | ||
2363 | return dwarf2_per_objfile->all_comp_units[index]; | |
2364 | } | |
2365 | ||
2366 | /* Return the primary CU given its index. | |
2367 | The difference between this function and dw2_get_cu is in the handling | |
2368 | of type units (TUs). Here we return the type_unit_group object. | |
2369 | ||
2370 | This is intended for loops like: | |
2371 | ||
2372 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2373 | + dwarf2_per_objfile->n_type_unit_groups); ++i) | |
2374 | { | |
2375 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); | |
2376 | ||
2377 | ...; | |
2378 | } | |
2379 | */ | |
2380 | ||
2381 | static struct dwarf2_per_cu_data * | |
2382 | dw2_get_primary_cu (int index) | |
2383 | { | |
2384 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2385 | { | |
1fd400ff | 2386 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2387 | gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups); |
2388 | return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu; | |
1fd400ff | 2389 | } |
f4dc4d17 | 2390 | |
1fd400ff TT |
2391 | return dwarf2_per_objfile->all_comp_units[index]; |
2392 | } | |
2393 | ||
2ec9a5e0 TT |
2394 | /* A helper for create_cus_from_index that handles a given list of |
2395 | CUs. */ | |
2fdf6df6 | 2396 | |
74a0d9f6 | 2397 | static void |
2ec9a5e0 TT |
2398 | create_cus_from_index_list (struct objfile *objfile, |
2399 | const gdb_byte *cu_list, offset_type n_elements, | |
2400 | struct dwarf2_section_info *section, | |
2401 | int is_dwz, | |
2402 | int base_offset) | |
9291a0cd TT |
2403 | { |
2404 | offset_type i; | |
9291a0cd | 2405 | |
2ec9a5e0 | 2406 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2407 | { |
2408 | struct dwarf2_per_cu_data *the_cu; | |
2409 | ULONGEST offset, length; | |
2410 | ||
74a0d9f6 JK |
2411 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2412 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2413 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2414 | cu_list += 2 * 8; |
2415 | ||
2416 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2417 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2418 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2419 | the_cu->length = length; |
2420 | the_cu->objfile = objfile; | |
8a0459fd | 2421 | the_cu->section = section; |
9291a0cd TT |
2422 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2423 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2424 | the_cu->is_dwz = is_dwz; |
2425 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2426 | } |
9291a0cd TT |
2427 | } |
2428 | ||
2ec9a5e0 | 2429 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2430 | the CU objects for this objfile. */ |
2ec9a5e0 | 2431 | |
74a0d9f6 | 2432 | static void |
2ec9a5e0 TT |
2433 | create_cus_from_index (struct objfile *objfile, |
2434 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2435 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2436 | { | |
2437 | struct dwz_file *dwz; | |
2438 | ||
2439 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2440 | dwarf2_per_objfile->all_comp_units | |
2441 | = obstack_alloc (&objfile->objfile_obstack, | |
2442 | dwarf2_per_objfile->n_comp_units | |
2443 | * sizeof (struct dwarf2_per_cu_data *)); | |
2444 | ||
74a0d9f6 JK |
2445 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2446 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2447 | |
2448 | if (dwz_elements == 0) | |
74a0d9f6 | 2449 | return; |
2ec9a5e0 TT |
2450 | |
2451 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2452 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2453 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2454 | } |
2455 | ||
1fd400ff | 2456 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2457 | |
74a0d9f6 | 2458 | static void |
673bfd45 | 2459 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2460 | struct dwarf2_section_info *section, |
673bfd45 DE |
2461 | const gdb_byte *bytes, |
2462 | offset_type elements) | |
1fd400ff TT |
2463 | { |
2464 | offset_type i; | |
673bfd45 | 2465 | htab_t sig_types_hash; |
1fd400ff | 2466 | |
d467dd73 DE |
2467 | dwarf2_per_objfile->n_type_units = elements / 3; |
2468 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 2469 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 2470 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 2471 | * sizeof (struct signatured_type *)); |
1fd400ff | 2472 | |
673bfd45 | 2473 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2474 | |
2475 | for (i = 0; i < elements; i += 3) | |
2476 | { | |
52dc124a DE |
2477 | struct signatured_type *sig_type; |
2478 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2479 | void **slot; |
2480 | ||
74a0d9f6 JK |
2481 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2482 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2483 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2484 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2485 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2486 | bytes += 3 * 8; | |
2487 | ||
52dc124a | 2488 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2489 | struct signatured_type); |
52dc124a | 2490 | sig_type->signature = signature; |
3019eac3 DE |
2491 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2492 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2493 | sig_type->per_cu.section = section; |
52dc124a DE |
2494 | sig_type->per_cu.offset.sect_off = offset; |
2495 | sig_type->per_cu.objfile = objfile; | |
2496 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2497 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2498 | struct dwarf2_per_cu_quick_data); | |
2499 | ||
52dc124a DE |
2500 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2501 | *slot = sig_type; | |
1fd400ff | 2502 | |
b4dd5633 | 2503 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2504 | } |
2505 | ||
673bfd45 | 2506 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2507 | } |
2508 | ||
9291a0cd TT |
2509 | /* Read the address map data from the mapped index, and use it to |
2510 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2511 | |
9291a0cd TT |
2512 | static void |
2513 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2514 | { | |
2515 | const gdb_byte *iter, *end; | |
2516 | struct obstack temp_obstack; | |
2517 | struct addrmap *mutable_map; | |
2518 | struct cleanup *cleanup; | |
2519 | CORE_ADDR baseaddr; | |
2520 | ||
2521 | obstack_init (&temp_obstack); | |
2522 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2523 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2524 | ||
2525 | iter = index->address_table; | |
2526 | end = iter + index->address_table_size; | |
2527 | ||
2528 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2529 | ||
2530 | while (iter < end) | |
2531 | { | |
2532 | ULONGEST hi, lo, cu_index; | |
2533 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2534 | iter += 8; | |
2535 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2536 | iter += 8; | |
2537 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2538 | iter += 4; | |
f652bce2 DE |
2539 | |
2540 | if (cu_index < dwarf2_per_objfile->n_comp_units) | |
2541 | { | |
2542 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
2543 | dw2_get_cu (cu_index)); | |
2544 | } | |
2545 | else | |
2546 | { | |
2547 | complaint (&symfile_complaints, | |
2548 | _(".gdb_index address table has invalid CU number %u"), | |
2549 | (unsigned) cu_index); | |
2550 | } | |
9291a0cd TT |
2551 | } |
2552 | ||
2553 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2554 | &objfile->objfile_obstack); | |
2555 | do_cleanups (cleanup); | |
2556 | } | |
2557 | ||
59d7bcaf JK |
2558 | /* The hash function for strings in the mapped index. This is the same as |
2559 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2560 | implementation. This is necessary because the hash function is tied to the | |
2561 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2562 | SYMBOL_HASH_NEXT. |
2563 | ||
2564 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2565 | |
9291a0cd | 2566 | static hashval_t |
559a7a62 | 2567 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2568 | { |
2569 | const unsigned char *str = (const unsigned char *) p; | |
2570 | hashval_t r = 0; | |
2571 | unsigned char c; | |
2572 | ||
2573 | while ((c = *str++) != 0) | |
559a7a62 JK |
2574 | { |
2575 | if (index_version >= 5) | |
2576 | c = tolower (c); | |
2577 | r = r * 67 + c - 113; | |
2578 | } | |
9291a0cd TT |
2579 | |
2580 | return r; | |
2581 | } | |
2582 | ||
2583 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2584 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2585 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2586 | |
9291a0cd TT |
2587 | static int |
2588 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2589 | offset_type **vec_out) | |
2590 | { | |
0cf03b49 JK |
2591 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2592 | offset_type hash; | |
9291a0cd | 2593 | offset_type slot, step; |
559a7a62 | 2594 | int (*cmp) (const char *, const char *); |
9291a0cd | 2595 | |
0cf03b49 JK |
2596 | if (current_language->la_language == language_cplus |
2597 | || current_language->la_language == language_java | |
2598 | || current_language->la_language == language_fortran) | |
2599 | { | |
2600 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2601 | not contain any. */ | |
2602 | const char *paren = strchr (name, '('); | |
2603 | ||
2604 | if (paren) | |
2605 | { | |
2606 | char *dup; | |
2607 | ||
2608 | dup = xmalloc (paren - name + 1); | |
2609 | memcpy (dup, name, paren - name); | |
2610 | dup[paren - name] = 0; | |
2611 | ||
2612 | make_cleanup (xfree, dup); | |
2613 | name = dup; | |
2614 | } | |
2615 | } | |
2616 | ||
559a7a62 | 2617 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2618 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2619 | simulate our NAME being searched is also lowercased. */ |
2620 | hash = mapped_index_string_hash ((index->version == 4 | |
2621 | && case_sensitivity == case_sensitive_off | |
2622 | ? 5 : index->version), | |
2623 | name); | |
2624 | ||
3876f04e DE |
2625 | slot = hash & (index->symbol_table_slots - 1); |
2626 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2627 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2628 | |
2629 | for (;;) | |
2630 | { | |
2631 | /* Convert a slot number to an offset into the table. */ | |
2632 | offset_type i = 2 * slot; | |
2633 | const char *str; | |
3876f04e | 2634 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2635 | { |
2636 | do_cleanups (back_to); | |
2637 | return 0; | |
2638 | } | |
9291a0cd | 2639 | |
3876f04e | 2640 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2641 | if (!cmp (name, str)) |
9291a0cd TT |
2642 | { |
2643 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2644 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2645 | do_cleanups (back_to); |
9291a0cd TT |
2646 | return 1; |
2647 | } | |
2648 | ||
3876f04e | 2649 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2650 | } |
2651 | } | |
2652 | ||
2ec9a5e0 TT |
2653 | /* A helper function that reads the .gdb_index from SECTION and fills |
2654 | in MAP. FILENAME is the name of the file containing the section; | |
2655 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2656 | ok to use deprecated sections. | |
2657 | ||
2658 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2659 | out parameters that are filled in with information about the CU and | |
2660 | TU lists in the section. | |
2661 | ||
2662 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 2663 | |
9291a0cd | 2664 | static int |
2ec9a5e0 TT |
2665 | read_index_from_section (struct objfile *objfile, |
2666 | const char *filename, | |
2667 | int deprecated_ok, | |
2668 | struct dwarf2_section_info *section, | |
2669 | struct mapped_index *map, | |
2670 | const gdb_byte **cu_list, | |
2671 | offset_type *cu_list_elements, | |
2672 | const gdb_byte **types_list, | |
2673 | offset_type *types_list_elements) | |
9291a0cd | 2674 | { |
948f8e3d | 2675 | const gdb_byte *addr; |
2ec9a5e0 | 2676 | offset_type version; |
b3b272e1 | 2677 | offset_type *metadata; |
1fd400ff | 2678 | int i; |
9291a0cd | 2679 | |
2ec9a5e0 | 2680 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 2681 | return 0; |
82430852 JK |
2682 | |
2683 | /* Older elfutils strip versions could keep the section in the main | |
2684 | executable while splitting it for the separate debug info file. */ | |
2ec9a5e0 | 2685 | if ((bfd_get_file_flags (section->asection) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
2686 | return 0; |
2687 | ||
2ec9a5e0 | 2688 | dwarf2_read_section (objfile, section); |
9291a0cd | 2689 | |
2ec9a5e0 | 2690 | addr = section->buffer; |
9291a0cd | 2691 | /* Version check. */ |
1fd400ff | 2692 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2693 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2694 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2695 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2696 | indices. */ |
831adc1f | 2697 | if (version < 4) |
481860b3 GB |
2698 | { |
2699 | static int warning_printed = 0; | |
2700 | if (!warning_printed) | |
2701 | { | |
2702 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2703 | filename); |
481860b3 GB |
2704 | warning_printed = 1; |
2705 | } | |
2706 | return 0; | |
2707 | } | |
2708 | /* Index version 4 uses a different hash function than index version | |
2709 | 5 and later. | |
2710 | ||
2711 | Versions earlier than 6 did not emit psymbols for inlined | |
2712 | functions. Using these files will cause GDB not to be able to | |
2713 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2714 | indices unless the user has done |
2715 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2716 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2717 | { |
2718 | static int warning_printed = 0; | |
2719 | if (!warning_printed) | |
2720 | { | |
e615022a DE |
2721 | warning (_("\ |
2722 | Skipping deprecated .gdb_index section in %s.\n\ | |
2723 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2724 | to use the section anyway."), | |
2ec9a5e0 | 2725 | filename); |
481860b3 GB |
2726 | warning_printed = 1; |
2727 | } | |
2728 | return 0; | |
2729 | } | |
796a7ff8 DE |
2730 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
2731 | of the TU (for symbols coming from TUs). It's just a performance bug, and | |
2732 | we can't distinguish gdb-generated indices from gold-generated ones, so | |
2733 | nothing to do here. */ | |
2734 | ||
481860b3 | 2735 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2736 | longer backward compatible. */ |
796a7ff8 | 2737 | if (version > 8) |
594e8718 | 2738 | return 0; |
9291a0cd | 2739 | |
559a7a62 | 2740 | map->version = version; |
2ec9a5e0 | 2741 | map->total_size = section->size; |
9291a0cd TT |
2742 | |
2743 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
2744 | |
2745 | i = 0; | |
2ec9a5e0 TT |
2746 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2747 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2748 | / 8); | |
1fd400ff TT |
2749 | ++i; |
2750 | ||
2ec9a5e0 TT |
2751 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2752 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2753 | - MAYBE_SWAP (metadata[i])) | |
2754 | / 8); | |
987d643c | 2755 | ++i; |
1fd400ff TT |
2756 | |
2757 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
2758 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
2759 | - MAYBE_SWAP (metadata[i])); | |
2760 | ++i; | |
2761 | ||
3876f04e DE |
2762 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
2763 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
2764 | - MAYBE_SWAP (metadata[i])) | |
2765 | / (2 * sizeof (offset_type))); | |
1fd400ff | 2766 | ++i; |
9291a0cd | 2767 | |
f9d83a0b | 2768 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 2769 | |
2ec9a5e0 TT |
2770 | return 1; |
2771 | } | |
2772 | ||
2773 | ||
2774 | /* Read the index file. If everything went ok, initialize the "quick" | |
2775 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
2776 | ||
2777 | static int | |
2778 | dwarf2_read_index (struct objfile *objfile) | |
2779 | { | |
2780 | struct mapped_index local_map, *map; | |
2781 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
2782 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
2783 | ||
2784 | if (!read_index_from_section (objfile, objfile->name, | |
2785 | use_deprecated_index_sections, | |
2786 | &dwarf2_per_objfile->gdb_index, &local_map, | |
2787 | &cu_list, &cu_list_elements, | |
2788 | &types_list, &types_list_elements)) | |
2789 | return 0; | |
2790 | ||
0fefef59 | 2791 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 2792 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
2793 | return 0; |
2794 | ||
2ec9a5e0 TT |
2795 | /* If there is a .dwz file, read it so we can get its CU list as |
2796 | well. */ | |
2797 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
2798 | { | |
2799 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
2800 | struct mapped_index dwz_map; | |
2801 | const gdb_byte *dwz_types_ignore; | |
2802 | offset_type dwz_types_elements_ignore; | |
2803 | ||
2804 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
2805 | 1, | |
2806 | &dwz->gdb_index, &dwz_map, | |
2807 | &dwz_list, &dwz_list_elements, | |
2808 | &dwz_types_ignore, | |
2809 | &dwz_types_elements_ignore)) | |
2810 | { | |
2811 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
2812 | bfd_get_filename (dwz->dwz_bfd)); | |
2813 | return 0; | |
2814 | } | |
2815 | } | |
2816 | ||
74a0d9f6 JK |
2817 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
2818 | dwz_list_elements); | |
1fd400ff | 2819 | |
8b70b953 TT |
2820 | if (types_list_elements) |
2821 | { | |
2822 | struct dwarf2_section_info *section; | |
2823 | ||
2824 | /* We can only handle a single .debug_types when we have an | |
2825 | index. */ | |
2826 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
2827 | return 0; | |
2828 | ||
2829 | section = VEC_index (dwarf2_section_info_def, | |
2830 | dwarf2_per_objfile->types, 0); | |
2831 | ||
74a0d9f6 JK |
2832 | create_signatured_type_table_from_index (objfile, section, types_list, |
2833 | types_list_elements); | |
8b70b953 | 2834 | } |
9291a0cd | 2835 | |
2ec9a5e0 TT |
2836 | create_addrmap_from_index (objfile, &local_map); |
2837 | ||
2838 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
2839 | *map = local_map; | |
9291a0cd TT |
2840 | |
2841 | dwarf2_per_objfile->index_table = map; | |
2842 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
2843 | dwarf2_per_objfile->quick_file_names_table = |
2844 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
2845 | |
2846 | return 1; | |
2847 | } | |
2848 | ||
2849 | /* A helper for the "quick" functions which sets the global | |
2850 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 2851 | |
9291a0cd TT |
2852 | static void |
2853 | dw2_setup (struct objfile *objfile) | |
2854 | { | |
2855 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
2856 | gdb_assert (dwarf2_per_objfile); | |
2857 | } | |
2858 | ||
dee91e82 | 2859 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 2860 | |
dee91e82 DE |
2861 | static void |
2862 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 2863 | const gdb_byte *info_ptr, |
dee91e82 DE |
2864 | struct die_info *comp_unit_die, |
2865 | int has_children, | |
2866 | void *data) | |
9291a0cd | 2867 | { |
dee91e82 DE |
2868 | struct dwarf2_cu *cu = reader->cu; |
2869 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
2870 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 2871 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 2872 | struct line_header *lh; |
9291a0cd | 2873 | struct attribute *attr; |
dee91e82 | 2874 | int i; |
15d034d0 | 2875 | const char *name, *comp_dir; |
7b9f3c50 DE |
2876 | void **slot; |
2877 | struct quick_file_names *qfn; | |
2878 | unsigned int line_offset; | |
9291a0cd | 2879 | |
0186c6a7 DE |
2880 | gdb_assert (! this_cu->is_debug_types); |
2881 | ||
07261596 TT |
2882 | /* Our callers never want to match partial units -- instead they |
2883 | will match the enclosing full CU. */ | |
2884 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
2885 | { | |
2886 | this_cu->v.quick->no_file_data = 1; | |
2887 | return; | |
2888 | } | |
2889 | ||
0186c6a7 | 2890 | lh_cu = this_cu; |
7b9f3c50 DE |
2891 | lh = NULL; |
2892 | slot = NULL; | |
2893 | line_offset = 0; | |
dee91e82 DE |
2894 | |
2895 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
2896 | if (attr) |
2897 | { | |
7b9f3c50 DE |
2898 | struct quick_file_names find_entry; |
2899 | ||
2900 | line_offset = DW_UNSND (attr); | |
2901 | ||
2902 | /* We may have already read in this line header (TU line header sharing). | |
2903 | If we have we're done. */ | |
094b34ac DE |
2904 | find_entry.hash.dwo_unit = cu->dwo_unit; |
2905 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2906 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
2907 | &find_entry, INSERT); | |
2908 | if (*slot != NULL) | |
2909 | { | |
094b34ac | 2910 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 2911 | return; |
7b9f3c50 DE |
2912 | } |
2913 | ||
3019eac3 | 2914 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
2915 | } |
2916 | if (lh == NULL) | |
2917 | { | |
094b34ac | 2918 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 2919 | return; |
9291a0cd TT |
2920 | } |
2921 | ||
7b9f3c50 | 2922 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
2923 | qfn->hash.dwo_unit = cu->dwo_unit; |
2924 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2925 | gdb_assert (slot != NULL); |
2926 | *slot = qfn; | |
9291a0cd | 2927 | |
dee91e82 | 2928 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 2929 | |
7b9f3c50 DE |
2930 | qfn->num_file_names = lh->num_file_names; |
2931 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
2932 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 2933 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
2934 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
2935 | qfn->real_names = NULL; | |
9291a0cd | 2936 | |
7b9f3c50 | 2937 | free_line_header (lh); |
7b9f3c50 | 2938 | |
094b34ac | 2939 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
2940 | } |
2941 | ||
2942 | /* A helper for the "quick" functions which attempts to read the line | |
2943 | table for THIS_CU. */ | |
2944 | ||
2945 | static struct quick_file_names * | |
e4a48d9d | 2946 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 2947 | { |
0186c6a7 DE |
2948 | /* This should never be called for TUs. */ |
2949 | gdb_assert (! this_cu->is_debug_types); | |
2950 | /* Nor type unit groups. */ | |
2951 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 2952 | |
dee91e82 DE |
2953 | if (this_cu->v.quick->file_names != NULL) |
2954 | return this_cu->v.quick->file_names; | |
2955 | /* If we know there is no line data, no point in looking again. */ | |
2956 | if (this_cu->v.quick->no_file_data) | |
2957 | return NULL; | |
2958 | ||
0186c6a7 | 2959 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
2960 | |
2961 | if (this_cu->v.quick->no_file_data) | |
2962 | return NULL; | |
2963 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
2964 | } |
2965 | ||
2966 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 2967 | real path for a given file name from the line table. */ |
2fdf6df6 | 2968 | |
9291a0cd | 2969 | static const char * |
7b9f3c50 DE |
2970 | dw2_get_real_path (struct objfile *objfile, |
2971 | struct quick_file_names *qfn, int index) | |
9291a0cd | 2972 | { |
7b9f3c50 DE |
2973 | if (qfn->real_names == NULL) |
2974 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
2975 | qfn->num_file_names, sizeof (char *)); | |
9291a0cd | 2976 | |
7b9f3c50 DE |
2977 | if (qfn->real_names[index] == NULL) |
2978 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 2979 | |
7b9f3c50 | 2980 | return qfn->real_names[index]; |
9291a0cd TT |
2981 | } |
2982 | ||
2983 | static struct symtab * | |
2984 | dw2_find_last_source_symtab (struct objfile *objfile) | |
2985 | { | |
2986 | int index; | |
ae2de4f8 | 2987 | |
9291a0cd TT |
2988 | dw2_setup (objfile); |
2989 | index = dwarf2_per_objfile->n_comp_units - 1; | |
a0f42c21 | 2990 | return dw2_instantiate_symtab (dw2_get_cu (index)); |
9291a0cd TT |
2991 | } |
2992 | ||
7b9f3c50 DE |
2993 | /* Traversal function for dw2_forget_cached_source_info. */ |
2994 | ||
2995 | static int | |
2996 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 2997 | { |
7b9f3c50 | 2998 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 2999 | |
7b9f3c50 | 3000 | if (file_data->real_names) |
9291a0cd | 3001 | { |
7b9f3c50 | 3002 | int i; |
9291a0cd | 3003 | |
7b9f3c50 | 3004 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3005 | { |
7b9f3c50 DE |
3006 | xfree ((void*) file_data->real_names[i]); |
3007 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3008 | } |
3009 | } | |
7b9f3c50 DE |
3010 | |
3011 | return 1; | |
3012 | } | |
3013 | ||
3014 | static void | |
3015 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3016 | { | |
3017 | dw2_setup (objfile); | |
3018 | ||
3019 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3020 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3021 | } |
3022 | ||
f8eba3c6 TT |
3023 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3024 | the symtabs and calls the iterator. */ | |
3025 | ||
3026 | static int | |
3027 | dw2_map_expand_apply (struct objfile *objfile, | |
3028 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3029 | const char *name, const char *real_path, |
f8eba3c6 TT |
3030 | int (*callback) (struct symtab *, void *), |
3031 | void *data) | |
3032 | { | |
3033 | struct symtab *last_made = objfile->symtabs; | |
3034 | ||
3035 | /* Don't visit already-expanded CUs. */ | |
3036 | if (per_cu->v.quick->symtab) | |
3037 | return 0; | |
3038 | ||
3039 | /* This may expand more than one symtab, and we want to iterate over | |
3040 | all of them. */ | |
a0f42c21 | 3041 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3042 | |
f5b95b50 | 3043 | return iterate_over_some_symtabs (name, real_path, callback, data, |
f8eba3c6 TT |
3044 | objfile->symtabs, last_made); |
3045 | } | |
3046 | ||
3047 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3048 | ||
9291a0cd | 3049 | static int |
f8eba3c6 | 3050 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3051 | const char *real_path, |
f8eba3c6 TT |
3052 | int (*callback) (struct symtab *, void *), |
3053 | void *data) | |
9291a0cd TT |
3054 | { |
3055 | int i; | |
c011a4f4 | 3056 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3057 | |
3058 | dw2_setup (objfile); | |
ae2de4f8 | 3059 | |
848e3e78 DE |
3060 | /* The rule is CUs specify all the files, including those used by |
3061 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3062 | |
848e3e78 | 3063 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3064 | { |
3065 | int j; | |
f4dc4d17 | 3066 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3067 | struct quick_file_names *file_data; |
9291a0cd | 3068 | |
3d7bb9d9 | 3069 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3070 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3071 | continue; |
3072 | ||
e4a48d9d | 3073 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3074 | if (file_data == NULL) |
9291a0cd TT |
3075 | continue; |
3076 | ||
7b9f3c50 | 3077 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3078 | { |
7b9f3c50 | 3079 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3080 | const char *this_real_name; |
9291a0cd | 3081 | |
af529f8f | 3082 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3083 | { |
f5b95b50 | 3084 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3085 | callback, data)) |
3086 | return 1; | |
288e77a7 | 3087 | continue; |
4aac40c8 | 3088 | } |
9291a0cd | 3089 | |
c011a4f4 DE |
3090 | /* Before we invoke realpath, which can get expensive when many |
3091 | files are involved, do a quick comparison of the basenames. */ | |
3092 | if (! basenames_may_differ | |
3093 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3094 | continue; | |
3095 | ||
da235a7c JK |
3096 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3097 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3098 | { |
da235a7c JK |
3099 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3100 | callback, data)) | |
3101 | return 1; | |
288e77a7 | 3102 | continue; |
da235a7c | 3103 | } |
9291a0cd | 3104 | |
da235a7c JK |
3105 | if (real_path != NULL) |
3106 | { | |
af529f8f JK |
3107 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3108 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3109 | if (this_real_name != NULL |
af529f8f | 3110 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3111 | { |
f5b95b50 | 3112 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3113 | callback, data)) |
3114 | return 1; | |
288e77a7 | 3115 | continue; |
9291a0cd TT |
3116 | } |
3117 | } | |
3118 | } | |
3119 | } | |
3120 | ||
9291a0cd TT |
3121 | return 0; |
3122 | } | |
3123 | ||
da51c347 DE |
3124 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3125 | ||
3126 | struct dw2_symtab_iterator | |
9291a0cd | 3127 | { |
da51c347 DE |
3128 | /* The internalized form of .gdb_index. */ |
3129 | struct mapped_index *index; | |
3130 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3131 | int want_specific_block; | |
3132 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3133 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3134 | int block_index; | |
3135 | /* The kind of symbol we're looking for. */ | |
3136 | domain_enum domain; | |
3137 | /* The list of CUs from the index entry of the symbol, | |
3138 | or NULL if not found. */ | |
3139 | offset_type *vec; | |
3140 | /* The next element in VEC to look at. */ | |
3141 | int next; | |
3142 | /* The number of elements in VEC, or zero if there is no match. */ | |
3143 | int length; | |
3144 | }; | |
9291a0cd | 3145 | |
da51c347 DE |
3146 | /* Initialize the index symtab iterator ITER. |
3147 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3148 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3149 | |
9291a0cd | 3150 | static void |
da51c347 DE |
3151 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3152 | struct mapped_index *index, | |
3153 | int want_specific_block, | |
3154 | int block_index, | |
3155 | domain_enum domain, | |
3156 | const char *name) | |
3157 | { | |
3158 | iter->index = index; | |
3159 | iter->want_specific_block = want_specific_block; | |
3160 | iter->block_index = block_index; | |
3161 | iter->domain = domain; | |
3162 | iter->next = 0; | |
3163 | ||
3164 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3165 | iter->length = MAYBE_SWAP (*iter->vec); | |
3166 | else | |
3167 | { | |
3168 | iter->vec = NULL; | |
3169 | iter->length = 0; | |
3170 | } | |
3171 | } | |
3172 | ||
3173 | /* Return the next matching CU or NULL if there are no more. */ | |
3174 | ||
3175 | static struct dwarf2_per_cu_data * | |
3176 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3177 | { | |
3178 | for ( ; iter->next < iter->length; ++iter->next) | |
3179 | { | |
3180 | offset_type cu_index_and_attrs = | |
3181 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3182 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3183 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index); | |
3184 | int want_static = iter->block_index != GLOBAL_BLOCK; | |
3185 | /* This value is only valid for index versions >= 7. */ | |
3186 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3187 | gdb_index_symbol_kind symbol_kind = | |
3188 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3189 | /* Only check the symbol attributes if they're present. | |
3190 | Indices prior to version 7 don't record them, | |
3191 | and indices >= 7 may elide them for certain symbols | |
3192 | (gold does this). */ | |
3193 | int attrs_valid = | |
3194 | (iter->index->version >= 7 | |
3195 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3196 | ||
3197 | /* Skip if already read in. */ | |
3198 | if (per_cu->v.quick->symtab) | |
3199 | continue; | |
3200 | ||
3201 | if (attrs_valid | |
3202 | && iter->want_specific_block | |
3203 | && want_static != is_static) | |
3204 | continue; | |
3205 | ||
3206 | /* Only check the symbol's kind if it has one. */ | |
3207 | if (attrs_valid) | |
3208 | { | |
3209 | switch (iter->domain) | |
3210 | { | |
3211 | case VAR_DOMAIN: | |
3212 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3213 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3214 | /* Some types are also in VAR_DOMAIN. */ | |
3215 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3216 | continue; | |
3217 | break; | |
3218 | case STRUCT_DOMAIN: | |
3219 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3220 | continue; | |
3221 | break; | |
3222 | case LABEL_DOMAIN: | |
3223 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3224 | continue; | |
3225 | break; | |
3226 | default: | |
3227 | break; | |
3228 | } | |
3229 | } | |
3230 | ||
3231 | ++iter->next; | |
3232 | return per_cu; | |
3233 | } | |
3234 | ||
3235 | return NULL; | |
3236 | } | |
3237 | ||
3238 | static struct symtab * | |
3239 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3240 | const char *name, domain_enum domain) | |
9291a0cd | 3241 | { |
da51c347 | 3242 | struct symtab *stab_best = NULL; |
156942c7 DE |
3243 | struct mapped_index *index; |
3244 | ||
9291a0cd TT |
3245 | dw2_setup (objfile); |
3246 | ||
156942c7 DE |
3247 | index = dwarf2_per_objfile->index_table; |
3248 | ||
da51c347 | 3249 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3250 | if (index) |
9291a0cd | 3251 | { |
da51c347 DE |
3252 | struct dw2_symtab_iterator iter; |
3253 | struct dwarf2_per_cu_data *per_cu; | |
3254 | ||
3255 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3256 | |
da51c347 | 3257 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3258 | { |
da51c347 DE |
3259 | struct symbol *sym = NULL; |
3260 | struct symtab *stab = dw2_instantiate_symtab (per_cu); | |
3261 | ||
3262 | /* Some caution must be observed with overloaded functions | |
3263 | and methods, since the index will not contain any overload | |
3264 | information (but NAME might contain it). */ | |
3265 | if (stab->primary) | |
9291a0cd | 3266 | { |
da51c347 DE |
3267 | struct blockvector *bv = BLOCKVECTOR (stab); |
3268 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
156942c7 | 3269 | |
da51c347 DE |
3270 | sym = lookup_block_symbol (block, name, domain); |
3271 | } | |
1fd400ff | 3272 | |
da51c347 DE |
3273 | if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) |
3274 | { | |
3275 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) | |
3276 | return stab; | |
3277 | ||
3278 | stab_best = stab; | |
9291a0cd | 3279 | } |
da51c347 DE |
3280 | |
3281 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3282 | } |
3283 | } | |
9291a0cd | 3284 | |
da51c347 | 3285 | return stab_best; |
9291a0cd TT |
3286 | } |
3287 | ||
3288 | static void | |
3289 | dw2_print_stats (struct objfile *objfile) | |
3290 | { | |
e4a48d9d | 3291 | int i, total, count; |
9291a0cd TT |
3292 | |
3293 | dw2_setup (objfile); | |
e4a48d9d | 3294 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3295 | count = 0; |
e4a48d9d | 3296 | for (i = 0; i < total; ++i) |
9291a0cd | 3297 | { |
e254ef6a | 3298 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3299 | |
e254ef6a | 3300 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3301 | ++count; |
3302 | } | |
e4a48d9d | 3303 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3304 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3305 | } | |
3306 | ||
3307 | static void | |
3308 | dw2_dump (struct objfile *objfile) | |
3309 | { | |
3310 | /* Nothing worth printing. */ | |
3311 | } | |
3312 | ||
3313 | static void | |
3314 | dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets, | |
3315 | struct section_offsets *delta) | |
3316 | { | |
3317 | /* There's nothing to relocate here. */ | |
3318 | } | |
3319 | ||
3320 | static void | |
3321 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3322 | const char *func_name) | |
3323 | { | |
da51c347 DE |
3324 | struct mapped_index *index; |
3325 | ||
3326 | dw2_setup (objfile); | |
3327 | ||
3328 | index = dwarf2_per_objfile->index_table; | |
3329 | ||
3330 | /* index is NULL if OBJF_READNOW. */ | |
3331 | if (index) | |
3332 | { | |
3333 | struct dw2_symtab_iterator iter; | |
3334 | struct dwarf2_per_cu_data *per_cu; | |
3335 | ||
3336 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3337 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3338 | func_name); | |
3339 | ||
3340 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3341 | dw2_instantiate_symtab (per_cu); | |
3342 | } | |
9291a0cd TT |
3343 | } |
3344 | ||
3345 | static void | |
3346 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3347 | { | |
3348 | int i; | |
3349 | ||
3350 | dw2_setup (objfile); | |
1fd400ff TT |
3351 | |
3352 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3353 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3354 | { |
e254ef6a | 3355 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3356 | |
a0f42c21 | 3357 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3358 | } |
3359 | } | |
3360 | ||
3361 | static void | |
652a8996 JK |
3362 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3363 | const char *fullname) | |
9291a0cd TT |
3364 | { |
3365 | int i; | |
3366 | ||
3367 | dw2_setup (objfile); | |
d4637a04 DE |
3368 | |
3369 | /* We don't need to consider type units here. | |
3370 | This is only called for examining code, e.g. expand_line_sal. | |
3371 | There can be an order of magnitude (or more) more type units | |
3372 | than comp units, and we avoid them if we can. */ | |
3373 | ||
3374 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3375 | { |
3376 | int j; | |
e254ef6a | 3377 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3378 | struct quick_file_names *file_data; |
9291a0cd | 3379 | |
3d7bb9d9 | 3380 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3381 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3382 | continue; |
3383 | ||
e4a48d9d | 3384 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3385 | if (file_data == NULL) |
9291a0cd TT |
3386 | continue; |
3387 | ||
7b9f3c50 | 3388 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3389 | { |
652a8996 JK |
3390 | const char *this_fullname = file_data->file_names[j]; |
3391 | ||
3392 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3393 | { |
a0f42c21 | 3394 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3395 | break; |
3396 | } | |
3397 | } | |
3398 | } | |
3399 | } | |
3400 | ||
356d9f9d TT |
3401 | /* A helper function for dw2_find_symbol_file that finds the primary |
3402 | file name for a given CU. This is a die_reader_func. */ | |
3403 | ||
3404 | static void | |
3405 | dw2_get_primary_filename_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3406 | const gdb_byte *info_ptr, |
356d9f9d TT |
3407 | struct die_info *comp_unit_die, |
3408 | int has_children, | |
3409 | void *data) | |
3410 | { | |
3411 | const char **result_ptr = data; | |
3412 | struct dwarf2_cu *cu = reader->cu; | |
3413 | struct attribute *attr; | |
3414 | ||
3415 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
3416 | if (attr == NULL) | |
3417 | *result_ptr = NULL; | |
3418 | else | |
3419 | *result_ptr = DW_STRING (attr); | |
3420 | } | |
3421 | ||
dd786858 | 3422 | static const char * |
9291a0cd TT |
3423 | dw2_find_symbol_file (struct objfile *objfile, const char *name) |
3424 | { | |
e254ef6a | 3425 | struct dwarf2_per_cu_data *per_cu; |
9291a0cd | 3426 | offset_type *vec; |
356d9f9d | 3427 | const char *filename; |
9291a0cd TT |
3428 | |
3429 | dw2_setup (objfile); | |
3430 | ||
ae2de4f8 | 3431 | /* index_table is NULL if OBJF_READNOW. */ |
9291a0cd | 3432 | if (!dwarf2_per_objfile->index_table) |
96408a79 SA |
3433 | { |
3434 | struct symtab *s; | |
3435 | ||
d790cf0a DE |
3436 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
3437 | { | |
3438 | struct blockvector *bv = BLOCKVECTOR (s); | |
3439 | const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); | |
3440 | struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN); | |
3441 | ||
3442 | if (sym) | |
652a8996 JK |
3443 | { |
3444 | /* Only file extension of returned filename is recognized. */ | |
3445 | return SYMBOL_SYMTAB (sym)->filename; | |
3446 | } | |
d790cf0a | 3447 | } |
96408a79 SA |
3448 | return NULL; |
3449 | } | |
9291a0cd TT |
3450 | |
3451 | if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table, | |
3452 | name, &vec)) | |
3453 | return NULL; | |
3454 | ||
3455 | /* Note that this just looks at the very first one named NAME -- but | |
3456 | actually we are looking for a function. find_main_filename | |
3457 | should be rewritten so that it doesn't require a custom hook. It | |
3458 | could just use the ordinary symbol tables. */ | |
3459 | /* vec[0] is the length, which must always be >0. */ | |
156942c7 | 3460 | per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1]))); |
9291a0cd | 3461 | |
356d9f9d | 3462 | if (per_cu->v.quick->symtab != NULL) |
652a8996 JK |
3463 | { |
3464 | /* Only file extension of returned filename is recognized. */ | |
3465 | return per_cu->v.quick->symtab->filename; | |
3466 | } | |
356d9f9d | 3467 | |
a98c29a0 DE |
3468 | /* Initialize filename in case there's a problem reading the DWARF, |
3469 | dw2_get_primary_filename_reader may not get called. */ | |
3470 | filename = NULL; | |
f4dc4d17 DE |
3471 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, |
3472 | dw2_get_primary_filename_reader, &filename); | |
9291a0cd | 3473 | |
652a8996 | 3474 | /* Only file extension of returned filename is recognized. */ |
356d9f9d | 3475 | return filename; |
9291a0cd TT |
3476 | } |
3477 | ||
3478 | static void | |
40658b94 PH |
3479 | dw2_map_matching_symbols (const char * name, domain_enum namespace, |
3480 | struct objfile *objfile, int global, | |
3481 | int (*callback) (struct block *, | |
3482 | struct symbol *, void *), | |
2edb89d3 JK |
3483 | void *data, symbol_compare_ftype *match, |
3484 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3485 | { |
40658b94 | 3486 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3487 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3488 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3489 | } |
3490 | ||
3491 | static void | |
f8eba3c6 TT |
3492 | dw2_expand_symtabs_matching |
3493 | (struct objfile *objfile, | |
fbd9ab74 | 3494 | int (*file_matcher) (const char *, void *, int basenames), |
e078317b | 3495 | int (*name_matcher) (const char *, void *), |
f8eba3c6 TT |
3496 | enum search_domain kind, |
3497 | void *data) | |
9291a0cd TT |
3498 | { |
3499 | int i; | |
3500 | offset_type iter; | |
4b5246aa | 3501 | struct mapped_index *index; |
9291a0cd TT |
3502 | |
3503 | dw2_setup (objfile); | |
ae2de4f8 DE |
3504 | |
3505 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3506 | if (!dwarf2_per_objfile->index_table) |
3507 | return; | |
4b5246aa | 3508 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3509 | |
7b08b9eb | 3510 | if (file_matcher != NULL) |
24c79950 TT |
3511 | { |
3512 | struct cleanup *cleanup; | |
3513 | htab_t visited_found, visited_not_found; | |
3514 | ||
3515 | visited_found = htab_create_alloc (10, | |
3516 | htab_hash_pointer, htab_eq_pointer, | |
3517 | NULL, xcalloc, xfree); | |
3518 | cleanup = make_cleanup_htab_delete (visited_found); | |
3519 | visited_not_found = htab_create_alloc (10, | |
3520 | htab_hash_pointer, htab_eq_pointer, | |
3521 | NULL, xcalloc, xfree); | |
3522 | make_cleanup_htab_delete (visited_not_found); | |
3523 | ||
848e3e78 DE |
3524 | /* The rule is CUs specify all the files, including those used by |
3525 | any TU, so there's no need to scan TUs here. */ | |
3526 | ||
3527 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3528 | { |
3529 | int j; | |
f4dc4d17 | 3530 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
24c79950 TT |
3531 | struct quick_file_names *file_data; |
3532 | void **slot; | |
7b08b9eb | 3533 | |
24c79950 | 3534 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3535 | |
24c79950 TT |
3536 | /* We only need to look at symtabs not already expanded. */ |
3537 | if (per_cu->v.quick->symtab) | |
3538 | continue; | |
7b08b9eb | 3539 | |
e4a48d9d | 3540 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3541 | if (file_data == NULL) |
3542 | continue; | |
7b08b9eb | 3543 | |
24c79950 TT |
3544 | if (htab_find (visited_not_found, file_data) != NULL) |
3545 | continue; | |
3546 | else if (htab_find (visited_found, file_data) != NULL) | |
3547 | { | |
3548 | per_cu->v.quick->mark = 1; | |
3549 | continue; | |
3550 | } | |
3551 | ||
3552 | for (j = 0; j < file_data->num_file_names; ++j) | |
3553 | { | |
da235a7c JK |
3554 | const char *this_real_name; |
3555 | ||
fbd9ab74 | 3556 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3557 | { |
3558 | per_cu->v.quick->mark = 1; | |
3559 | break; | |
3560 | } | |
da235a7c JK |
3561 | |
3562 | /* Before we invoke realpath, which can get expensive when many | |
3563 | files are involved, do a quick comparison of the basenames. */ | |
3564 | if (!basenames_may_differ | |
3565 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3566 | data, 1)) | |
3567 | continue; | |
3568 | ||
3569 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3570 | if (file_matcher (this_real_name, data, 0)) | |
3571 | { | |
3572 | per_cu->v.quick->mark = 1; | |
3573 | break; | |
3574 | } | |
24c79950 TT |
3575 | } |
3576 | ||
3577 | slot = htab_find_slot (per_cu->v.quick->mark | |
3578 | ? visited_found | |
3579 | : visited_not_found, | |
3580 | file_data, INSERT); | |
3581 | *slot = file_data; | |
3582 | } | |
3583 | ||
3584 | do_cleanups (cleanup); | |
3585 | } | |
9291a0cd | 3586 | |
3876f04e | 3587 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3588 | { |
3589 | offset_type idx = 2 * iter; | |
3590 | const char *name; | |
3591 | offset_type *vec, vec_len, vec_idx; | |
3592 | ||
3876f04e | 3593 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3594 | continue; |
3595 | ||
3876f04e | 3596 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3597 | |
e078317b | 3598 | if (! (*name_matcher) (name, data)) |
9291a0cd TT |
3599 | continue; |
3600 | ||
3601 | /* The name was matched, now expand corresponding CUs that were | |
3602 | marked. */ | |
4b5246aa | 3603 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3604 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3605 | vec_len = MAYBE_SWAP (vec[0]); |
3606 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3607 | { | |
e254ef6a | 3608 | struct dwarf2_per_cu_data *per_cu; |
156942c7 DE |
3609 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
3610 | gdb_index_symbol_kind symbol_kind = | |
3611 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3612 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3613 | ||
3614 | /* Don't crash on bad data. */ | |
3615 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
667e0a4b | 3616 | + dwarf2_per_objfile->n_type_units)) |
156942c7 | 3617 | continue; |
1fd400ff | 3618 | |
156942c7 DE |
3619 | /* Only check the symbol's kind if it has one. |
3620 | Indices prior to version 7 don't record it. */ | |
3621 | if (index->version >= 7) | |
3622 | { | |
3623 | switch (kind) | |
3624 | { | |
3625 | case VARIABLES_DOMAIN: | |
3626 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3627 | continue; | |
3628 | break; | |
3629 | case FUNCTIONS_DOMAIN: | |
3630 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3631 | continue; | |
3632 | break; | |
3633 | case TYPES_DOMAIN: | |
3634 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3635 | continue; | |
3636 | break; | |
3637 | default: | |
3638 | break; | |
3639 | } | |
3640 | } | |
3641 | ||
3642 | per_cu = dw2_get_cu (cu_index); | |
7b08b9eb | 3643 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3644 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3645 | } |
3646 | } | |
3647 | } | |
3648 | ||
9703b513 TT |
3649 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3650 | symtab. */ | |
3651 | ||
3652 | static struct symtab * | |
3653 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3654 | { | |
3655 | int i; | |
3656 | ||
3657 | if (BLOCKVECTOR (symtab) != NULL | |
3658 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3659 | return symtab; | |
3660 | ||
a3ec0bb1 DE |
3661 | if (symtab->includes == NULL) |
3662 | return NULL; | |
3663 | ||
9703b513 TT |
3664 | for (i = 0; symtab->includes[i]; ++i) |
3665 | { | |
a3ec0bb1 | 3666 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
3667 | |
3668 | s = recursively_find_pc_sect_symtab (s, pc); | |
3669 | if (s != NULL) | |
3670 | return s; | |
3671 | } | |
3672 | ||
3673 | return NULL; | |
3674 | } | |
3675 | ||
9291a0cd TT |
3676 | static struct symtab * |
3677 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
3678 | struct minimal_symbol *msymbol, | |
3679 | CORE_ADDR pc, | |
3680 | struct obj_section *section, | |
3681 | int warn_if_readin) | |
3682 | { | |
3683 | struct dwarf2_per_cu_data *data; | |
9703b513 | 3684 | struct symtab *result; |
9291a0cd TT |
3685 | |
3686 | dw2_setup (objfile); | |
3687 | ||
3688 | if (!objfile->psymtabs_addrmap) | |
3689 | return NULL; | |
3690 | ||
3691 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
3692 | if (!data) | |
3693 | return NULL; | |
3694 | ||
3695 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 3696 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
3697 | paddress (get_objfile_arch (objfile), pc)); |
3698 | ||
9703b513 TT |
3699 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
3700 | gdb_assert (result != NULL); | |
3701 | return result; | |
9291a0cd TT |
3702 | } |
3703 | ||
9291a0cd | 3704 | static void |
44b13c5a | 3705 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 3706 | void *data, int need_fullname) |
9291a0cd TT |
3707 | { |
3708 | int i; | |
24c79950 TT |
3709 | struct cleanup *cleanup; |
3710 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
3711 | NULL, xcalloc, xfree); | |
9291a0cd | 3712 | |
24c79950 | 3713 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 3714 | dw2_setup (objfile); |
ae2de4f8 | 3715 | |
848e3e78 DE |
3716 | /* The rule is CUs specify all the files, including those used by |
3717 | any TU, so there's no need to scan TUs here. | |
3718 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 3719 | |
848e3e78 | 3720 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 TT |
3721 | { |
3722 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
3723 | ||
3724 | if (per_cu->v.quick->symtab) | |
3725 | { | |
3726 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
3727 | INSERT); | |
3728 | ||
3729 | *slot = per_cu->v.quick->file_names; | |
3730 | } | |
3731 | } | |
3732 | ||
848e3e78 | 3733 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3734 | { |
3735 | int j; | |
f4dc4d17 | 3736 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3737 | struct quick_file_names *file_data; |
24c79950 | 3738 | void **slot; |
9291a0cd | 3739 | |
3d7bb9d9 | 3740 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3741 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3742 | continue; |
3743 | ||
e4a48d9d | 3744 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3745 | if (file_data == NULL) |
9291a0cd TT |
3746 | continue; |
3747 | ||
24c79950 TT |
3748 | slot = htab_find_slot (visited, file_data, INSERT); |
3749 | if (*slot) | |
3750 | { | |
3751 | /* Already visited. */ | |
3752 | continue; | |
3753 | } | |
3754 | *slot = file_data; | |
3755 | ||
7b9f3c50 | 3756 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3757 | { |
74e2f255 DE |
3758 | const char *this_real_name; |
3759 | ||
3760 | if (need_fullname) | |
3761 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3762 | else | |
3763 | this_real_name = NULL; | |
7b9f3c50 | 3764 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
3765 | } |
3766 | } | |
24c79950 TT |
3767 | |
3768 | do_cleanups (cleanup); | |
9291a0cd TT |
3769 | } |
3770 | ||
3771 | static int | |
3772 | dw2_has_symbols (struct objfile *objfile) | |
3773 | { | |
3774 | return 1; | |
3775 | } | |
3776 | ||
3777 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
3778 | { | |
3779 | dw2_has_symbols, | |
3780 | dw2_find_last_source_symtab, | |
3781 | dw2_forget_cached_source_info, | |
f8eba3c6 | 3782 | dw2_map_symtabs_matching_filename, |
9291a0cd | 3783 | dw2_lookup_symbol, |
9291a0cd TT |
3784 | dw2_print_stats, |
3785 | dw2_dump, | |
3786 | dw2_relocate, | |
3787 | dw2_expand_symtabs_for_function, | |
3788 | dw2_expand_all_symtabs, | |
652a8996 | 3789 | dw2_expand_symtabs_with_fullname, |
9291a0cd | 3790 | dw2_find_symbol_file, |
40658b94 | 3791 | dw2_map_matching_symbols, |
9291a0cd TT |
3792 | dw2_expand_symtabs_matching, |
3793 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
3794 | dw2_map_symbol_filenames |
3795 | }; | |
3796 | ||
3797 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
3798 | file will use psymtabs, or 1 if using the GNU index. */ | |
3799 | ||
3800 | int | |
3801 | dwarf2_initialize_objfile (struct objfile *objfile) | |
3802 | { | |
3803 | /* If we're about to read full symbols, don't bother with the | |
3804 | indices. In this case we also don't care if some other debug | |
3805 | format is making psymtabs, because they are all about to be | |
3806 | expanded anyway. */ | |
3807 | if ((objfile->flags & OBJF_READNOW)) | |
3808 | { | |
3809 | int i; | |
3810 | ||
3811 | dwarf2_per_objfile->using_index = 1; | |
3812 | create_all_comp_units (objfile); | |
0e50663e | 3813 | create_all_type_units (objfile); |
7b9f3c50 DE |
3814 | dwarf2_per_objfile->quick_file_names_table = |
3815 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 3816 | |
1fd400ff | 3817 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 3818 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3819 | { |
e254ef6a | 3820 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3821 | |
e254ef6a DE |
3822 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3823 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
3824 | } |
3825 | ||
3826 | /* Return 1 so that gdb sees the "quick" functions. However, | |
3827 | these functions will be no-ops because we will have expanded | |
3828 | all symtabs. */ | |
3829 | return 1; | |
3830 | } | |
3831 | ||
3832 | if (dwarf2_read_index (objfile)) | |
3833 | return 1; | |
3834 | ||
9291a0cd TT |
3835 | return 0; |
3836 | } | |
3837 | ||
3838 | \f | |
3839 | ||
dce234bc PP |
3840 | /* Build a partial symbol table. */ |
3841 | ||
3842 | void | |
f29dff0a | 3843 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 3844 | { |
c9bf0622 TT |
3845 | volatile struct gdb_exception except; |
3846 | ||
f29dff0a | 3847 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
3848 | { |
3849 | init_psymbol_list (objfile, 1024); | |
3850 | } | |
3851 | ||
c9bf0622 TT |
3852 | TRY_CATCH (except, RETURN_MASK_ERROR) |
3853 | { | |
3854 | /* This isn't really ideal: all the data we allocate on the | |
3855 | objfile's obstack is still uselessly kept around. However, | |
3856 | freeing it seems unsafe. */ | |
3857 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
3858 | ||
3859 | dwarf2_build_psymtabs_hard (objfile); | |
3860 | discard_cleanups (cleanups); | |
3861 | } | |
3862 | if (except.reason < 0) | |
3863 | exception_print (gdb_stderr, except); | |
c906108c | 3864 | } |
c906108c | 3865 | |
1ce1cefd DE |
3866 | /* Return the total length of the CU described by HEADER. */ |
3867 | ||
3868 | static unsigned int | |
3869 | get_cu_length (const struct comp_unit_head *header) | |
3870 | { | |
3871 | return header->initial_length_size + header->length; | |
3872 | } | |
3873 | ||
45452591 DE |
3874 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
3875 | ||
3876 | static inline int | |
b64f50a1 | 3877 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 3878 | { |
b64f50a1 | 3879 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 3880 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 3881 | |
b64f50a1 | 3882 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
3883 | } |
3884 | ||
3b80fe9b DE |
3885 | /* Find the base address of the compilation unit for range lists and |
3886 | location lists. It will normally be specified by DW_AT_low_pc. | |
3887 | In DWARF-3 draft 4, the base address could be overridden by | |
3888 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
3889 | compilation units with discontinuous ranges. */ | |
3890 | ||
3891 | static void | |
3892 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
3893 | { | |
3894 | struct attribute *attr; | |
3895 | ||
3896 | cu->base_known = 0; | |
3897 | cu->base_address = 0; | |
3898 | ||
3899 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
3900 | if (attr) | |
3901 | { | |
3902 | cu->base_address = DW_ADDR (attr); | |
3903 | cu->base_known = 1; | |
3904 | } | |
3905 | else | |
3906 | { | |
3907 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
3908 | if (attr) | |
3909 | { | |
3910 | cu->base_address = DW_ADDR (attr); | |
3911 | cu->base_known = 1; | |
3912 | } | |
3913 | } | |
3914 | } | |
3915 | ||
93311388 DE |
3916 | /* Read in the comp unit header information from the debug_info at info_ptr. |
3917 | NOTE: This leaves members offset, first_die_offset to be filled in | |
3918 | by the caller. */ | |
107d2387 | 3919 | |
d521ce57 | 3920 | static const gdb_byte * |
107d2387 | 3921 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 3922 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
3923 | { |
3924 | int signed_addr; | |
891d2f0b | 3925 | unsigned int bytes_read; |
c764a876 DE |
3926 | |
3927 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
3928 | cu_header->initial_length_size = bytes_read; | |
3929 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 3930 | info_ptr += bytes_read; |
107d2387 AC |
3931 | cu_header->version = read_2_bytes (abfd, info_ptr); |
3932 | info_ptr += 2; | |
b64f50a1 JK |
3933 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
3934 | &bytes_read); | |
613e1657 | 3935 | info_ptr += bytes_read; |
107d2387 AC |
3936 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
3937 | info_ptr += 1; | |
3938 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
3939 | if (signed_addr < 0) | |
8e65ff28 | 3940 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 3941 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 3942 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 3943 | |
107d2387 AC |
3944 | return info_ptr; |
3945 | } | |
3946 | ||
36586728 TT |
3947 | /* Helper function that returns the proper abbrev section for |
3948 | THIS_CU. */ | |
3949 | ||
3950 | static struct dwarf2_section_info * | |
3951 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
3952 | { | |
3953 | struct dwarf2_section_info *abbrev; | |
3954 | ||
3955 | if (this_cu->is_dwz) | |
3956 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
3957 | else | |
3958 | abbrev = &dwarf2_per_objfile->abbrev; | |
3959 | ||
3960 | return abbrev; | |
3961 | } | |
3962 | ||
9ff913ba DE |
3963 | /* Subroutine of read_and_check_comp_unit_head and |
3964 | read_and_check_type_unit_head to simplify them. | |
3965 | Perform various error checking on the header. */ | |
3966 | ||
3967 | static void | |
3968 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
3969 | struct dwarf2_section_info *section, |
3970 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba DE |
3971 | { |
3972 | bfd *abfd = section->asection->owner; | |
3973 | const char *filename = bfd_get_filename (abfd); | |
3974 | ||
3975 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
3976 | error (_("Dwarf Error: wrong version in compilation unit header " | |
3977 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
3978 | filename); | |
3979 | ||
b64f50a1 | 3980 | if (header->abbrev_offset.sect_off |
36586728 | 3981 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
3982 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
3983 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 3984 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
3985 | filename); |
3986 | ||
3987 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
3988 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 3989 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
3990 | > section->size) |
3991 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
3992 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 3993 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
3994 | filename); |
3995 | } | |
3996 | ||
3997 | /* Read in a CU/TU header and perform some basic error checking. | |
3998 | The contents of the header are stored in HEADER. | |
3999 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 4000 | |
d521ce57 | 4001 | static const gdb_byte * |
9ff913ba DE |
4002 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4003 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4004 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4005 | const gdb_byte *info_ptr, |
9ff913ba | 4006 | int is_debug_types_section) |
72bf9492 | 4007 | { |
d521ce57 | 4008 | const gdb_byte *beg_of_comp_unit = info_ptr; |
9ff913ba | 4009 | bfd *abfd = section->asection->owner; |
72bf9492 | 4010 | |
b64f50a1 | 4011 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4012 | |
72bf9492 DJ |
4013 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4014 | ||
460c1c54 CC |
4015 | /* If we're reading a type unit, skip over the signature and |
4016 | type_offset fields. */ | |
b0df02fd | 4017 | if (is_debug_types_section) |
460c1c54 CC |
4018 | info_ptr += 8 /*signature*/ + header->offset_size; |
4019 | ||
b64f50a1 | 4020 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4021 | |
4bdcc0c1 | 4022 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4023 | |
4024 | return info_ptr; | |
4025 | } | |
4026 | ||
348e048f DE |
4027 | /* Read in the types comp unit header information from .debug_types entry at |
4028 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4029 | ||
d521ce57 | 4030 | static const gdb_byte * |
9ff913ba DE |
4031 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4032 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4033 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4034 | const gdb_byte *info_ptr, |
dee91e82 DE |
4035 | ULONGEST *signature, |
4036 | cu_offset *type_offset_in_tu) | |
348e048f | 4037 | { |
d521ce57 | 4038 | const gdb_byte *beg_of_comp_unit = info_ptr; |
9ff913ba | 4039 | bfd *abfd = section->asection->owner; |
348e048f | 4040 | |
b64f50a1 | 4041 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4042 | |
9ff913ba | 4043 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4044 | |
9ff913ba DE |
4045 | /* If we're reading a type unit, skip over the signature and |
4046 | type_offset fields. */ | |
4047 | if (signature != NULL) | |
4048 | *signature = read_8_bytes (abfd, info_ptr); | |
4049 | info_ptr += 8; | |
dee91e82 DE |
4050 | if (type_offset_in_tu != NULL) |
4051 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4052 | header->offset_size); | |
9ff913ba DE |
4053 | info_ptr += header->offset_size; |
4054 | ||
b64f50a1 | 4055 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4056 | |
4bdcc0c1 | 4057 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4058 | |
4059 | return info_ptr; | |
348e048f DE |
4060 | } |
4061 | ||
f4dc4d17 DE |
4062 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4063 | ||
4064 | static sect_offset | |
4065 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4066 | sect_offset offset) | |
4067 | { | |
4068 | bfd *abfd = section->asection->owner; | |
d521ce57 | 4069 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4070 | unsigned int length, initial_length_size, offset_size; |
4071 | sect_offset abbrev_offset; | |
4072 | ||
4073 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4074 | info_ptr = section->buffer + offset.sect_off; | |
4075 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4076 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4077 | info_ptr += initial_length_size + 2 /*version*/; | |
4078 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4079 | return abbrev_offset; | |
4080 | } | |
4081 | ||
aaa75496 JB |
4082 | /* Allocate a new partial symtab for file named NAME and mark this new |
4083 | partial symtab as being an include of PST. */ | |
4084 | ||
4085 | static void | |
d521ce57 | 4086 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4087 | struct objfile *objfile) |
4088 | { | |
4089 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4090 | ||
fbd9ab74 JK |
4091 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4092 | { | |
4093 | /* It shares objfile->objfile_obstack. */ | |
4094 | subpst->dirname = pst->dirname; | |
4095 | } | |
4096 | ||
aaa75496 JB |
4097 | subpst->section_offsets = pst->section_offsets; |
4098 | subpst->textlow = 0; | |
4099 | subpst->texthigh = 0; | |
4100 | ||
4101 | subpst->dependencies = (struct partial_symtab **) | |
4102 | obstack_alloc (&objfile->objfile_obstack, | |
4103 | sizeof (struct partial_symtab *)); | |
4104 | subpst->dependencies[0] = pst; | |
4105 | subpst->number_of_dependencies = 1; | |
4106 | ||
4107 | subpst->globals_offset = 0; | |
4108 | subpst->n_global_syms = 0; | |
4109 | subpst->statics_offset = 0; | |
4110 | subpst->n_static_syms = 0; | |
4111 | subpst->symtab = NULL; | |
4112 | subpst->read_symtab = pst->read_symtab; | |
4113 | subpst->readin = 0; | |
4114 | ||
4115 | /* No private part is necessary for include psymtabs. This property | |
4116 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4117 | the regular ones. */ |
58a9656e | 4118 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4119 | } |
4120 | ||
4121 | /* Read the Line Number Program data and extract the list of files | |
4122 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4123 | partial symtab for each of these included files. */ |
aaa75496 JB |
4124 | |
4125 | static void | |
4126 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4127 | struct die_info *die, |
4128 | struct partial_symtab *pst) | |
aaa75496 | 4129 | { |
d85a05f0 DJ |
4130 | struct line_header *lh = NULL; |
4131 | struct attribute *attr; | |
aaa75496 | 4132 | |
d85a05f0 DJ |
4133 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4134 | if (attr) | |
3019eac3 | 4135 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4136 | if (lh == NULL) |
4137 | return; /* No linetable, so no includes. */ | |
4138 | ||
c6da4cef | 4139 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
f3f5162e | 4140 | dwarf_decode_lines (lh, pst->dirname, cu, pst, 1); |
aaa75496 JB |
4141 | |
4142 | free_line_header (lh); | |
4143 | } | |
4144 | ||
348e048f | 4145 | static hashval_t |
52dc124a | 4146 | hash_signatured_type (const void *item) |
348e048f | 4147 | { |
52dc124a | 4148 | const struct signatured_type *sig_type = item; |
9a619af0 | 4149 | |
348e048f | 4150 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4151 | return sig_type->signature; |
348e048f DE |
4152 | } |
4153 | ||
4154 | static int | |
52dc124a | 4155 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4156 | { |
4157 | const struct signatured_type *lhs = item_lhs; | |
4158 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4159 | |
348e048f DE |
4160 | return lhs->signature == rhs->signature; |
4161 | } | |
4162 | ||
1fd400ff TT |
4163 | /* Allocate a hash table for signatured types. */ |
4164 | ||
4165 | static htab_t | |
673bfd45 | 4166 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4167 | { |
4168 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4169 | hash_signatured_type, |
4170 | eq_signatured_type, | |
1fd400ff TT |
4171 | NULL, |
4172 | &objfile->objfile_obstack, | |
4173 | hashtab_obstack_allocate, | |
4174 | dummy_obstack_deallocate); | |
4175 | } | |
4176 | ||
d467dd73 | 4177 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4178 | |
4179 | static int | |
d467dd73 | 4180 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4181 | { |
4182 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4183 | struct signatured_type ***datap = datum; |
1fd400ff | 4184 | |
b4dd5633 | 4185 | **datap = sigt; |
1fd400ff TT |
4186 | ++*datap; |
4187 | ||
4188 | return 1; | |
4189 | } | |
4190 | ||
c88ee1f0 DE |
4191 | /* Create the hash table of all entries in the .debug_types |
4192 | (or .debug_types.dwo) section(s). | |
4193 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4194 | otherwise it is NULL. | |
4195 | ||
4196 | The result is a pointer to the hash table or NULL if there are no types. | |
4197 | ||
4198 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4199 | |
3019eac3 DE |
4200 | static htab_t |
4201 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4202 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4203 | { |
3019eac3 | 4204 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4205 | htab_t types_htab = NULL; |
8b70b953 TT |
4206 | int ix; |
4207 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4208 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4209 | |
3019eac3 DE |
4210 | if (VEC_empty (dwarf2_section_info_def, types)) |
4211 | return NULL; | |
348e048f | 4212 | |
4bdcc0c1 DE |
4213 | abbrev_section = (dwo_file != NULL |
4214 | ? &dwo_file->sections.abbrev | |
4215 | : &dwarf2_per_objfile->abbrev); | |
4216 | ||
09406207 DE |
4217 | if (dwarf2_read_debug) |
4218 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4219 | dwo_file ? ".dwo" : "", | |
4220 | bfd_get_filename (abbrev_section->asection->owner)); | |
4221 | ||
8b70b953 | 4222 | for (ix = 0; |
3019eac3 | 4223 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4224 | ++ix) |
4225 | { | |
3019eac3 | 4226 | bfd *abfd; |
d521ce57 | 4227 | const gdb_byte *info_ptr, *end_ptr; |
36586728 | 4228 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4229 | |
8b70b953 TT |
4230 | dwarf2_read_section (objfile, section); |
4231 | info_ptr = section->buffer; | |
348e048f | 4232 | |
8b70b953 TT |
4233 | if (info_ptr == NULL) |
4234 | continue; | |
348e048f | 4235 | |
3019eac3 DE |
4236 | /* We can't set abfd until now because the section may be empty or |
4237 | not present, in which case section->asection will be NULL. */ | |
4238 | abfd = section->asection->owner; | |
4239 | ||
36586728 TT |
4240 | if (dwo_file) |
4241 | abbrev_section = &dwo_file->sections.abbrev; | |
4242 | else | |
4243 | abbrev_section = &dwarf2_per_objfile->abbrev; | |
4244 | ||
dee91e82 DE |
4245 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4246 | because we don't need to read any dies: the signature is in the | |
4247 | header. */ | |
8b70b953 TT |
4248 | |
4249 | end_ptr = info_ptr + section->size; | |
4250 | while (info_ptr < end_ptr) | |
4251 | { | |
b64f50a1 | 4252 | sect_offset offset; |
3019eac3 | 4253 | cu_offset type_offset_in_tu; |
8b70b953 | 4254 | ULONGEST signature; |
52dc124a | 4255 | struct signatured_type *sig_type; |
3019eac3 | 4256 | struct dwo_unit *dwo_tu; |
8b70b953 | 4257 | void **slot; |
d521ce57 | 4258 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4259 | struct comp_unit_head header; |
dee91e82 | 4260 | unsigned int length; |
348e048f | 4261 | |
b64f50a1 | 4262 | offset.sect_off = ptr - section->buffer; |
348e048f | 4263 | |
8b70b953 | 4264 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4265 | table, but we don't need anything else just yet. */ |
348e048f | 4266 | |
4bdcc0c1 DE |
4267 | ptr = read_and_check_type_unit_head (&header, section, |
4268 | abbrev_section, ptr, | |
3019eac3 | 4269 | &signature, &type_offset_in_tu); |
6caca83c | 4270 | |
1ce1cefd | 4271 | length = get_cu_length (&header); |
dee91e82 | 4272 | |
6caca83c | 4273 | /* Skip dummy type units. */ |
dee91e82 DE |
4274 | if (ptr >= info_ptr + length |
4275 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4276 | { |
1ce1cefd | 4277 | info_ptr += length; |
6caca83c CC |
4278 | continue; |
4279 | } | |
8b70b953 | 4280 | |
0349ea22 DE |
4281 | if (types_htab == NULL) |
4282 | { | |
4283 | if (dwo_file) | |
4284 | types_htab = allocate_dwo_unit_table (objfile); | |
4285 | else | |
4286 | types_htab = allocate_signatured_type_table (objfile); | |
4287 | } | |
4288 | ||
3019eac3 DE |
4289 | if (dwo_file) |
4290 | { | |
4291 | sig_type = NULL; | |
4292 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4293 | struct dwo_unit); | |
4294 | dwo_tu->dwo_file = dwo_file; | |
4295 | dwo_tu->signature = signature; | |
4296 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4297 | dwo_tu->section = section; |
3019eac3 DE |
4298 | dwo_tu->offset = offset; |
4299 | dwo_tu->length = length; | |
4300 | } | |
4301 | else | |
4302 | { | |
4303 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4304 | The real type_offset is in the DWO file. */ | |
4305 | dwo_tu = NULL; | |
4306 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4307 | struct signatured_type); | |
4308 | sig_type->signature = signature; | |
4309 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4310 | sig_type->per_cu.objfile = objfile; | |
4311 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4312 | sig_type->per_cu.section = section; |
3019eac3 DE |
4313 | sig_type->per_cu.offset = offset; |
4314 | sig_type->per_cu.length = length; | |
4315 | } | |
8b70b953 | 4316 | |
3019eac3 DE |
4317 | slot = htab_find_slot (types_htab, |
4318 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4319 | INSERT); | |
8b70b953 TT |
4320 | gdb_assert (slot != NULL); |
4321 | if (*slot != NULL) | |
4322 | { | |
3019eac3 DE |
4323 | sect_offset dup_offset; |
4324 | ||
4325 | if (dwo_file) | |
4326 | { | |
4327 | const struct dwo_unit *dup_tu = *slot; | |
4328 | ||
4329 | dup_offset = dup_tu->offset; | |
4330 | } | |
4331 | else | |
4332 | { | |
4333 | const struct signatured_type *dup_tu = *slot; | |
4334 | ||
4335 | dup_offset = dup_tu->per_cu.offset; | |
4336 | } | |
b3c8eb43 | 4337 | |
8b70b953 | 4338 | complaint (&symfile_complaints, |
c88ee1f0 | 4339 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4340 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4341 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4342 | hex_string (signature)); |
8b70b953 | 4343 | } |
3019eac3 | 4344 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4345 | |
09406207 | 4346 | if (dwarf2_read_debug) |
4031ecc5 | 4347 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4348 | offset.sect_off, |
4031ecc5 | 4349 | hex_string (signature)); |
348e048f | 4350 | |
dee91e82 | 4351 | info_ptr += length; |
8b70b953 | 4352 | } |
348e048f DE |
4353 | } |
4354 | ||
3019eac3 DE |
4355 | return types_htab; |
4356 | } | |
4357 | ||
4358 | /* Create the hash table of all entries in the .debug_types section, | |
4359 | and initialize all_type_units. | |
4360 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4361 | otherwise non-zero. */ | |
4362 | ||
4363 | static int | |
4364 | create_all_type_units (struct objfile *objfile) | |
4365 | { | |
4366 | htab_t types_htab; | |
b4dd5633 | 4367 | struct signatured_type **iter; |
3019eac3 DE |
4368 | |
4369 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4370 | if (types_htab == NULL) | |
4371 | { | |
4372 | dwarf2_per_objfile->signatured_types = NULL; | |
4373 | return 0; | |
4374 | } | |
4375 | ||
348e048f DE |
4376 | dwarf2_per_objfile->signatured_types = types_htab; |
4377 | ||
d467dd73 DE |
4378 | dwarf2_per_objfile->n_type_units = htab_elements (types_htab); |
4379 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 4380 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 4381 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 4382 | * sizeof (struct signatured_type *)); |
d467dd73 DE |
4383 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4384 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4385 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4386 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4387 | |
348e048f DE |
4388 | return 1; |
4389 | } | |
4390 | ||
380bca97 | 4391 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
4392 | Returns NULL if signature SIG is not present in the table. |
4393 | It is up to the caller to complain about this. */ | |
348e048f DE |
4394 | |
4395 | static struct signatured_type * | |
e319fa28 | 4396 | lookup_signatured_type (ULONGEST sig) |
348e048f DE |
4397 | { |
4398 | struct signatured_type find_entry, *entry; | |
4399 | ||
4400 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5a8b3f62 | 4401 | return NULL; |
348e048f DE |
4402 | find_entry.signature = sig; |
4403 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4404 | return entry; | |
4405 | } | |
42e7ad6c DE |
4406 | \f |
4407 | /* Low level DIE reading support. */ | |
348e048f | 4408 | |
d85a05f0 DJ |
4409 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4410 | ||
4411 | static void | |
4412 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4413 | struct dwarf2_cu *cu, |
3019eac3 DE |
4414 | struct dwarf2_section_info *section, |
4415 | struct dwo_file *dwo_file) | |
d85a05f0 | 4416 | { |
fceca515 | 4417 | gdb_assert (section->readin && section->buffer != NULL); |
dee91e82 | 4418 | reader->abfd = section->asection->owner; |
d85a05f0 | 4419 | reader->cu = cu; |
3019eac3 | 4420 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4421 | reader->die_section = section; |
4422 | reader->buffer = section->buffer; | |
f664829e | 4423 | reader->buffer_end = section->buffer + section->size; |
d85a05f0 DJ |
4424 | } |
4425 | ||
b0c7bfa9 DE |
4426 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
4427 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
4428 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
4429 | already. | |
4430 | ||
4431 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
4432 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
4433 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN | |
4434 | are filled in with the info of the DIE from the DWO file. | |
4435 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
4436 | provided an abbrev table to use. | |
4437 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
4438 | ||
4439 | static int | |
4440 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
4441 | struct dwo_unit *dwo_unit, | |
4442 | int abbrev_table_provided, | |
4443 | struct die_info *stub_comp_unit_die, | |
4444 | struct die_reader_specs *result_reader, | |
d521ce57 | 4445 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
4446 | struct die_info **result_comp_unit_die, |
4447 | int *result_has_children) | |
4448 | { | |
4449 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4450 | struct dwarf2_cu *cu = this_cu->cu; | |
4451 | struct dwarf2_section_info *section; | |
4452 | bfd *abfd; | |
d521ce57 | 4453 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
4454 | const char *comp_dir_string; |
4455 | ULONGEST signature; /* Or dwo_id. */ | |
4456 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
4457 | int i,num_extra_attrs; | |
4458 | struct dwarf2_section_info *dwo_abbrev_section; | |
4459 | struct attribute *attr; | |
4460 | struct die_info *comp_unit_die; | |
4461 | ||
4462 | /* These attributes aren't processed until later: | |
4463 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
4464 | However, the attribute is found in the stub which we won't have later. | |
4465 | In order to not impose this complication on the rest of the code, | |
4466 | we read them here and copy them to the DWO CU/TU die. */ | |
4467 | ||
4468 | stmt_list = NULL; | |
4469 | low_pc = NULL; | |
4470 | high_pc = NULL; | |
4471 | ranges = NULL; | |
4472 | comp_dir = NULL; | |
4473 | ||
4474 | if (stub_comp_unit_die != NULL) | |
4475 | { | |
4476 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
4477 | DWO file. */ | |
4478 | if (! this_cu->is_debug_types) | |
4479 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
4480 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
4481 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
4482 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
4483 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
4484 | ||
4485 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
4486 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
4487 | cu->addr_base = 0; | |
4488 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
4489 | if (attr) | |
4490 | cu->addr_base = DW_UNSND (attr); | |
4491 | ||
4492 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
4493 | We need the value before we can process DW_AT_ranges. */ | |
4494 | cu->ranges_base = 0; | |
4495 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
4496 | if (attr) | |
4497 | cu->ranges_base = DW_UNSND (attr); | |
4498 | } | |
4499 | ||
4500 | /* Set up for reading the DWO CU/TU. */ | |
4501 | cu->dwo_unit = dwo_unit; | |
4502 | section = dwo_unit->section; | |
4503 | dwarf2_read_section (objfile, section); | |
4504 | abfd = section->asection->owner; | |
4505 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; | |
4506 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
4507 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
4508 | ||
4509 | if (this_cu->is_debug_types) | |
4510 | { | |
4511 | ULONGEST header_signature; | |
4512 | cu_offset type_offset_in_tu; | |
4513 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
4514 | ||
4515 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
4516 | dwo_abbrev_section, | |
4517 | info_ptr, | |
4518 | &header_signature, | |
4519 | &type_offset_in_tu); | |
4520 | gdb_assert (sig_type->signature == header_signature); | |
4521 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
4522 | /* For DWOs coming from DWP files, we don't know the CU length | |
4523 | nor the type's offset in the TU until now. */ | |
4524 | dwo_unit->length = get_cu_length (&cu->header); | |
4525 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
4526 | ||
4527 | /* Establish the type offset that can be used to lookup the type. | |
4528 | For DWO files, we don't know it until now. */ | |
4529 | sig_type->type_offset_in_section.sect_off = | |
4530 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
4531 | } | |
4532 | else | |
4533 | { | |
4534 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
4535 | dwo_abbrev_section, | |
4536 | info_ptr, 0); | |
4537 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
4538 | /* For DWOs coming from DWP files, we don't know the CU length | |
4539 | until now. */ | |
4540 | dwo_unit->length = get_cu_length (&cu->header); | |
4541 | } | |
4542 | ||
02142a6c DE |
4543 | /* Replace the CU's original abbrev table with the DWO's. |
4544 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
4545 | if (abbrev_table_provided) |
4546 | { | |
4547 | /* Don't free the provided abbrev table, the caller of | |
4548 | init_cutu_and_read_dies owns it. */ | |
4549 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 4550 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
4551 | make_cleanup (dwarf2_free_abbrev_table, cu); |
4552 | } | |
4553 | else | |
4554 | { | |
4555 | dwarf2_free_abbrev_table (cu); | |
4556 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 4557 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
4558 | } |
4559 | ||
4560 | /* Read in the die, but leave space to copy over the attributes | |
4561 | from the stub. This has the benefit of simplifying the rest of | |
4562 | the code - all the work to maintain the illusion of a single | |
4563 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
4564 | num_extra_attrs = ((stmt_list != NULL) | |
4565 | + (low_pc != NULL) | |
4566 | + (high_pc != NULL) | |
4567 | + (ranges != NULL) | |
4568 | + (comp_dir != NULL)); | |
4569 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
4570 | result_has_children, num_extra_attrs); | |
4571 | ||
4572 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
4573 | comp_unit_die = *result_comp_unit_die; | |
4574 | i = comp_unit_die->num_attrs; | |
4575 | if (stmt_list != NULL) | |
4576 | comp_unit_die->attrs[i++] = *stmt_list; | |
4577 | if (low_pc != NULL) | |
4578 | comp_unit_die->attrs[i++] = *low_pc; | |
4579 | if (high_pc != NULL) | |
4580 | comp_unit_die->attrs[i++] = *high_pc; | |
4581 | if (ranges != NULL) | |
4582 | comp_unit_die->attrs[i++] = *ranges; | |
4583 | if (comp_dir != NULL) | |
4584 | comp_unit_die->attrs[i++] = *comp_dir; | |
4585 | comp_unit_die->num_attrs += num_extra_attrs; | |
4586 | ||
bf6af496 DE |
4587 | if (dwarf2_die_debug) |
4588 | { | |
4589 | fprintf_unfiltered (gdb_stdlog, | |
4590 | "Read die from %s@0x%x of %s:\n", | |
4591 | bfd_section_name (abfd, section->asection), | |
4592 | (unsigned) (begin_info_ptr - section->buffer), | |
4593 | bfd_get_filename (abfd)); | |
4594 | dump_die (comp_unit_die, dwarf2_die_debug); | |
4595 | } | |
4596 | ||
b0c7bfa9 DE |
4597 | /* Skip dummy compilation units. */ |
4598 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
4599 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
4600 | return 0; | |
4601 | ||
4602 | *result_info_ptr = info_ptr; | |
4603 | return 1; | |
4604 | } | |
4605 | ||
4606 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
4607 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 4608 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
4609 | |
4610 | static struct dwo_unit * | |
4611 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
4612 | struct die_info *comp_unit_die) | |
4613 | { | |
4614 | struct dwarf2_cu *cu = this_cu->cu; | |
4615 | struct attribute *attr; | |
4616 | ULONGEST signature; | |
4617 | struct dwo_unit *dwo_unit; | |
4618 | const char *comp_dir, *dwo_name; | |
4619 | ||
4620 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ | |
4621 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
4622 | gdb_assert (attr != NULL); | |
4623 | dwo_name = DW_STRING (attr); | |
4624 | comp_dir = NULL; | |
4625 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
4626 | if (attr) | |
4627 | comp_dir = DW_STRING (attr); | |
4628 | ||
4629 | if (this_cu->is_debug_types) | |
4630 | { | |
4631 | struct signatured_type *sig_type; | |
4632 | ||
4633 | /* Since this_cu is the first member of struct signatured_type, | |
4634 | we can go from a pointer to one to a pointer to the other. */ | |
4635 | sig_type = (struct signatured_type *) this_cu; | |
4636 | signature = sig_type->signature; | |
4637 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
4638 | } | |
4639 | else | |
4640 | { | |
4641 | struct attribute *attr; | |
4642 | ||
4643 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
4644 | if (! attr) | |
4645 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
4646 | " [in module %s]"), | |
4647 | dwo_name, this_cu->objfile->name); | |
4648 | signature = DW_UNSND (attr); | |
4649 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
4650 | signature); | |
4651 | } | |
4652 | ||
b0c7bfa9 DE |
4653 | return dwo_unit; |
4654 | } | |
4655 | ||
fd820528 | 4656 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 4657 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 4658 | |
f4dc4d17 DE |
4659 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
4660 | Otherwise the table specified in the comp unit header is read in and used. | |
4661 | This is an optimization for when we already have the abbrev table. | |
4662 | ||
dee91e82 DE |
4663 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
4664 | Otherwise, a new CU is allocated with xmalloc. | |
4665 | ||
4666 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
4667 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
4668 | ||
4669 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 4670 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 4671 | |
70221824 | 4672 | static void |
fd820528 | 4673 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 4674 | struct abbrev_table *abbrev_table, |
fd820528 DE |
4675 | int use_existing_cu, int keep, |
4676 | die_reader_func_ftype *die_reader_func, | |
4677 | void *data) | |
c906108c | 4678 | { |
dee91e82 | 4679 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 4680 | struct dwarf2_section_info *section = this_cu->section; |
3019eac3 | 4681 | bfd *abfd = section->asection->owner; |
dee91e82 | 4682 | struct dwarf2_cu *cu; |
d521ce57 | 4683 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 4684 | struct die_reader_specs reader; |
d85a05f0 | 4685 | struct die_info *comp_unit_die; |
dee91e82 | 4686 | int has_children; |
d85a05f0 | 4687 | struct attribute *attr; |
dee91e82 DE |
4688 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
4689 | struct signatured_type *sig_type = NULL; | |
4bdcc0c1 | 4690 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
4691 | /* Non-zero if CU currently points to a DWO file and we need to |
4692 | reread it. When this happens we need to reread the skeleton die | |
4693 | before we can reread the DWO file. */ | |
4694 | int rereading_dwo_cu = 0; | |
c906108c | 4695 | |
09406207 DE |
4696 | if (dwarf2_die_debug) |
4697 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4698 | this_cu->is_debug_types ? "type" : "comp", | |
4699 | this_cu->offset.sect_off); | |
4700 | ||
dee91e82 DE |
4701 | if (use_existing_cu) |
4702 | gdb_assert (keep); | |
23745b47 | 4703 | |
dee91e82 DE |
4704 | cleanups = make_cleanup (null_cleanup, NULL); |
4705 | ||
4706 | /* This is cheap if the section is already read in. */ | |
4707 | dwarf2_read_section (objfile, section); | |
4708 | ||
4709 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
4710 | |
4711 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
4712 | |
4713 | if (use_existing_cu && this_cu->cu != NULL) | |
4714 | { | |
4715 | cu = this_cu->cu; | |
42e7ad6c DE |
4716 | |
4717 | /* If this CU is from a DWO file we need to start over, we need to | |
4718 | refetch the attributes from the skeleton CU. | |
4719 | This could be optimized by retrieving those attributes from when we | |
4720 | were here the first time: the previous comp_unit_die was stored in | |
4721 | comp_unit_obstack. But there's no data yet that we need this | |
4722 | optimization. */ | |
4723 | if (cu->dwo_unit != NULL) | |
4724 | rereading_dwo_cu = 1; | |
dee91e82 DE |
4725 | } |
4726 | else | |
4727 | { | |
4728 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
4729 | gdb_assert (this_cu->cu == NULL); | |
4730 | ||
4731 | cu = xmalloc (sizeof (*cu)); | |
4732 | init_one_comp_unit (cu, this_cu); | |
4733 | ||
4734 | /* If an error occurs while loading, release our storage. */ | |
4735 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
42e7ad6c | 4736 | } |
dee91e82 | 4737 | |
b0c7bfa9 | 4738 | /* Get the header. */ |
42e7ad6c DE |
4739 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
4740 | { | |
4741 | /* We already have the header, there's no need to read it in again. */ | |
4742 | info_ptr += cu->header.first_die_offset.cu_off; | |
4743 | } | |
4744 | else | |
4745 | { | |
3019eac3 | 4746 | if (this_cu->is_debug_types) |
dee91e82 DE |
4747 | { |
4748 | ULONGEST signature; | |
42e7ad6c | 4749 | cu_offset type_offset_in_tu; |
dee91e82 | 4750 | |
4bdcc0c1 DE |
4751 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
4752 | abbrev_section, info_ptr, | |
42e7ad6c DE |
4753 | &signature, |
4754 | &type_offset_in_tu); | |
dee91e82 | 4755 | |
42e7ad6c DE |
4756 | /* Since per_cu is the first member of struct signatured_type, |
4757 | we can go from a pointer to one to a pointer to the other. */ | |
4758 | sig_type = (struct signatured_type *) this_cu; | |
4759 | gdb_assert (sig_type->signature == signature); | |
4760 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
4761 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
4762 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
4763 | ||
42e7ad6c DE |
4764 | /* LENGTH has not been set yet for type units if we're |
4765 | using .gdb_index. */ | |
1ce1cefd | 4766 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
4767 | |
4768 | /* Establish the type offset that can be used to lookup the type. */ | |
4769 | sig_type->type_offset_in_section.sect_off = | |
4770 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
4771 | } |
4772 | else | |
4773 | { | |
4bdcc0c1 DE |
4774 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4775 | abbrev_section, | |
4776 | info_ptr, 0); | |
dee91e82 DE |
4777 | |
4778 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 4779 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
4780 | } |
4781 | } | |
10b3939b | 4782 | |
6caca83c | 4783 | /* Skip dummy compilation units. */ |
dee91e82 | 4784 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
4785 | || peek_abbrev_code (abfd, info_ptr) == 0) |
4786 | { | |
dee91e82 | 4787 | do_cleanups (cleanups); |
21b2bd31 | 4788 | return; |
6caca83c CC |
4789 | } |
4790 | ||
433df2d4 DE |
4791 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
4792 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
4793 | done. Note that it's important that if the CU had an abbrev table |
4794 | on entry we don't free it when we're done: Somewhere up the call stack | |
4795 | it may be in use. */ | |
f4dc4d17 DE |
4796 | if (abbrev_table != NULL) |
4797 | { | |
4798 | gdb_assert (cu->abbrev_table == NULL); | |
4799 | gdb_assert (cu->header.abbrev_offset.sect_off | |
4800 | == abbrev_table->offset.sect_off); | |
4801 | cu->abbrev_table = abbrev_table; | |
4802 | } | |
4803 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 4804 | { |
4bdcc0c1 | 4805 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
4806 | make_cleanup (dwarf2_free_abbrev_table, cu); |
4807 | } | |
42e7ad6c DE |
4808 | else if (rereading_dwo_cu) |
4809 | { | |
4810 | dwarf2_free_abbrev_table (cu); | |
4811 | dwarf2_read_abbrevs (cu, abbrev_section); | |
4812 | } | |
af703f96 | 4813 | |
dee91e82 | 4814 | /* Read the top level CU/TU die. */ |
3019eac3 | 4815 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 4816 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 4817 | |
b0c7bfa9 DE |
4818 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
4819 | from the DWO file. | |
4820 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
4821 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
4822 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
4823 | if (attr) | |
4824 | { | |
3019eac3 | 4825 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 4826 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
4827 | |
4828 | if (has_children) | |
6a506a2d DE |
4829 | { |
4830 | complaint (&symfile_complaints, | |
4831 | _("compilation unit with DW_AT_GNU_dwo_name" | |
4832 | " has children (offset 0x%x) [in module %s]"), | |
4833 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
4834 | } | |
b0c7bfa9 | 4835 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 4836 | if (dwo_unit != NULL) |
3019eac3 | 4837 | { |
6a506a2d DE |
4838 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
4839 | abbrev_table != NULL, | |
4840 | comp_unit_die, | |
4841 | &reader, &info_ptr, | |
4842 | &dwo_comp_unit_die, &has_children) == 0) | |
4843 | { | |
4844 | /* Dummy die. */ | |
4845 | do_cleanups (cleanups); | |
4846 | return; | |
4847 | } | |
4848 | comp_unit_die = dwo_comp_unit_die; | |
4849 | } | |
4850 | else | |
4851 | { | |
4852 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
4853 | the stub. A complaint has already been logged. There's | |
4854 | not much more we can do except pass on the stub DIE to | |
4855 | die_reader_func. We don't want to throw an error on bad | |
4856 | debug info. */ | |
3019eac3 DE |
4857 | } |
4858 | } | |
4859 | ||
b0c7bfa9 | 4860 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
4861 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
4862 | ||
b0c7bfa9 | 4863 | /* Done, clean up. */ |
dee91e82 | 4864 | if (free_cu_cleanup != NULL) |
348e048f | 4865 | { |
dee91e82 DE |
4866 | if (keep) |
4867 | { | |
4868 | /* We've successfully allocated this compilation unit. Let our | |
4869 | caller clean it up when finished with it. */ | |
4870 | discard_cleanups (free_cu_cleanup); | |
4871 | ||
4872 | /* We can only discard free_cu_cleanup and all subsequent cleanups. | |
4873 | So we have to manually free the abbrev table. */ | |
4874 | dwarf2_free_abbrev_table (cu); | |
4875 | ||
4876 | /* Link this CU into read_in_chain. */ | |
4877 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
4878 | dwarf2_per_objfile->read_in_chain = this_cu; | |
4879 | } | |
4880 | else | |
4881 | do_cleanups (free_cu_cleanup); | |
348e048f | 4882 | } |
dee91e82 DE |
4883 | |
4884 | do_cleanups (cleanups); | |
4885 | } | |
4886 | ||
3019eac3 DE |
4887 | /* Read CU/TU THIS_CU in section SECTION, |
4888 | but do not follow DW_AT_GNU_dwo_name if present. | |
80626a55 DE |
4889 | DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed |
4890 | to have already done the lookup to find the DWO/DWP file). | |
dee91e82 DE |
4891 | |
4892 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 4893 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
4894 | |
4895 | We fill in THIS_CU->length. | |
4896 | ||
4897 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
4898 | linker) then DIE_READER_FUNC will not get called. | |
4899 | ||
4900 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4901 | This is done in order to not leave THIS_CU->cu in a state where we have |
4902 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
4903 | |
4904 | static void | |
4905 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
4906 | struct dwarf2_section_info *abbrev_section, | |
3019eac3 | 4907 | struct dwo_file *dwo_file, |
dee91e82 DE |
4908 | die_reader_func_ftype *die_reader_func, |
4909 | void *data) | |
4910 | { | |
4911 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 4912 | struct dwarf2_section_info *section = this_cu->section; |
3019eac3 | 4913 | bfd *abfd = section->asection->owner; |
dee91e82 | 4914 | struct dwarf2_cu cu; |
d521ce57 | 4915 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
4916 | struct die_reader_specs reader; |
4917 | struct cleanup *cleanups; | |
4918 | struct die_info *comp_unit_die; | |
4919 | int has_children; | |
4920 | ||
09406207 DE |
4921 | if (dwarf2_die_debug) |
4922 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4923 | this_cu->is_debug_types ? "type" : "comp", | |
4924 | this_cu->offset.sect_off); | |
4925 | ||
dee91e82 DE |
4926 | gdb_assert (this_cu->cu == NULL); |
4927 | ||
dee91e82 DE |
4928 | /* This is cheap if the section is already read in. */ |
4929 | dwarf2_read_section (objfile, section); | |
4930 | ||
4931 | init_one_comp_unit (&cu, this_cu); | |
4932 | ||
4933 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
4934 | ||
4935 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
4936 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
4937 | abbrev_section, info_ptr, | |
3019eac3 | 4938 | this_cu->is_debug_types); |
dee91e82 | 4939 | |
1ce1cefd | 4940 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
4941 | |
4942 | /* Skip dummy compilation units. */ | |
4943 | if (info_ptr >= begin_info_ptr + this_cu->length | |
4944 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 4945 | { |
dee91e82 | 4946 | do_cleanups (cleanups); |
21b2bd31 | 4947 | return; |
93311388 | 4948 | } |
72bf9492 | 4949 | |
dee91e82 DE |
4950 | dwarf2_read_abbrevs (&cu, abbrev_section); |
4951 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
4952 | ||
3019eac3 | 4953 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
4954 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
4955 | ||
4956 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
4957 | ||
4958 | do_cleanups (cleanups); | |
4959 | } | |
4960 | ||
3019eac3 DE |
4961 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
4962 | does not lookup the specified DWO file. | |
4963 | This cannot be used to read DWO files. | |
dee91e82 DE |
4964 | |
4965 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4966 | This is done in order to not leave THIS_CU->cu in a state where we have |
4967 | to care whether it refers to the "main" CU or the DWO CU. | |
4968 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
4969 | |
4970 | static void | |
4971 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
4972 | die_reader_func_ftype *die_reader_func, | |
4973 | void *data) | |
4974 | { | |
4975 | init_cutu_and_read_dies_no_follow (this_cu, | |
36586728 | 4976 | get_abbrev_section_for_cu (this_cu), |
3019eac3 | 4977 | NULL, |
dee91e82 DE |
4978 | die_reader_func, data); |
4979 | } | |
0018ea6f DE |
4980 | \f |
4981 | /* Type Unit Groups. | |
dee91e82 | 4982 | |
0018ea6f DE |
4983 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
4984 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
4985 | so that all types coming from the same compilation (.o file) are grouped | |
4986 | together. A future step could be to put the types in the same symtab as | |
4987 | the CU the types ultimately came from. */ | |
ff013f42 | 4988 | |
f4dc4d17 DE |
4989 | static hashval_t |
4990 | hash_type_unit_group (const void *item) | |
4991 | { | |
094b34ac | 4992 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 4993 | |
094b34ac | 4994 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 4995 | } |
348e048f DE |
4996 | |
4997 | static int | |
f4dc4d17 | 4998 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 4999 | { |
f4dc4d17 DE |
5000 | const struct type_unit_group *lhs = item_lhs; |
5001 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 5002 | |
094b34ac | 5003 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 5004 | } |
348e048f | 5005 | |
f4dc4d17 DE |
5006 | /* Allocate a hash table for type unit groups. */ |
5007 | ||
5008 | static htab_t | |
5009 | allocate_type_unit_groups_table (void) | |
5010 | { | |
5011 | return htab_create_alloc_ex (3, | |
5012 | hash_type_unit_group, | |
5013 | eq_type_unit_group, | |
5014 | NULL, | |
5015 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5016 | hashtab_obstack_allocate, | |
5017 | dummy_obstack_deallocate); | |
5018 | } | |
dee91e82 | 5019 | |
f4dc4d17 DE |
5020 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5021 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5022 | of any one psymtab grow too big. */ | |
5023 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5024 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5025 | |
094b34ac | 5026 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5027 | Create the type_unit_group object used to hold one or more TUs. */ |
5028 | ||
5029 | static struct type_unit_group * | |
094b34ac | 5030 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5031 | { |
5032 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5033 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5034 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5035 | |
5036 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5037 | struct type_unit_group); | |
094b34ac | 5038 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5039 | per_cu->objfile = objfile; |
f4dc4d17 | 5040 | |
094b34ac DE |
5041 | if (dwarf2_per_objfile->using_index) |
5042 | { | |
5043 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5044 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5045 | } |
5046 | else | |
5047 | { | |
5048 | unsigned int line_offset = line_offset_struct.sect_off; | |
5049 | struct partial_symtab *pst; | |
5050 | char *name; | |
5051 | ||
5052 | /* Give the symtab a useful name for debug purposes. */ | |
5053 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5054 | name = xstrprintf ("<type_units_%d>", | |
5055 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5056 | else | |
5057 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5058 | ||
5059 | pst = create_partial_symtab (per_cu, name); | |
5060 | pst->anonymous = 1; | |
f4dc4d17 | 5061 | |
094b34ac DE |
5062 | xfree (name); |
5063 | } | |
f4dc4d17 | 5064 | |
094b34ac DE |
5065 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5066 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5067 | |
5068 | return tu_group; | |
5069 | } | |
5070 | ||
094b34ac DE |
5071 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5072 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5073 | |
5074 | static struct type_unit_group * | |
094b34ac | 5075 | get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list) |
f4dc4d17 DE |
5076 | { |
5077 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5078 | struct type_unit_group *tu_group; | |
5079 | void **slot; | |
5080 | unsigned int line_offset; | |
5081 | struct type_unit_group type_unit_group_for_lookup; | |
5082 | ||
5083 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5084 | { | |
5085 | dwarf2_per_objfile->type_unit_groups = | |
5086 | allocate_type_unit_groups_table (); | |
5087 | } | |
5088 | ||
5089 | /* Do we need to create a new group, or can we use an existing one? */ | |
5090 | ||
5091 | if (stmt_list) | |
5092 | { | |
5093 | line_offset = DW_UNSND (stmt_list); | |
5094 | ++tu_stats->nr_symtab_sharers; | |
5095 | } | |
5096 | else | |
5097 | { | |
5098 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5099 | We can do various things here like create one group per TU or | |
5100 | spread them over multiple groups to split up the expansion work. | |
5101 | To avoid worst case scenarios (too many groups or too large groups) | |
5102 | we, umm, group them in bunches. */ | |
5103 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5104 | | (tu_stats->nr_stmt_less_type_units | |
5105 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5106 | ++tu_stats->nr_stmt_less_type_units; | |
5107 | } | |
5108 | ||
094b34ac DE |
5109 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5110 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5111 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5112 | &type_unit_group_for_lookup, INSERT); | |
5113 | if (*slot != NULL) | |
5114 | { | |
5115 | tu_group = *slot; | |
5116 | gdb_assert (tu_group != NULL); | |
5117 | } | |
5118 | else | |
5119 | { | |
5120 | sect_offset line_offset_struct; | |
5121 | ||
5122 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5123 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5124 | *slot = tu_group; |
5125 | ++tu_stats->nr_symtabs; | |
5126 | } | |
5127 | ||
5128 | return tu_group; | |
5129 | } | |
5130 | ||
5131 | /* Struct used to sort TUs by their abbreviation table offset. */ | |
5132 | ||
5133 | struct tu_abbrev_offset | |
5134 | { | |
5135 | struct signatured_type *sig_type; | |
5136 | sect_offset abbrev_offset; | |
5137 | }; | |
5138 | ||
5139 | /* Helper routine for build_type_unit_groups, passed to qsort. */ | |
5140 | ||
5141 | static int | |
5142 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
5143 | { | |
5144 | const struct tu_abbrev_offset * const *a = ap; | |
5145 | const struct tu_abbrev_offset * const *b = bp; | |
5146 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
5147 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
5148 | ||
5149 | return (aoff > boff) - (aoff < boff); | |
5150 | } | |
5151 | ||
5152 | /* A helper function to add a type_unit_group to a table. */ | |
5153 | ||
5154 | static int | |
5155 | add_type_unit_group_to_table (void **slot, void *datum) | |
5156 | { | |
5157 | struct type_unit_group *tu_group = *slot; | |
5158 | struct type_unit_group ***datap = datum; | |
5159 | ||
5160 | **datap = tu_group; | |
5161 | ++*datap; | |
5162 | ||
5163 | return 1; | |
5164 | } | |
5165 | ||
5166 | /* Efficiently read all the type units, calling init_cutu_and_read_dies on | |
5167 | each one passing FUNC,DATA. | |
5168 | ||
5169 | The efficiency is because we sort TUs by the abbrev table they use and | |
5170 | only read each abbrev table once. In one program there are 200K TUs | |
5171 | sharing 8K abbrev tables. | |
5172 | ||
5173 | The main purpose of this function is to support building the | |
5174 | dwarf2_per_objfile->type_unit_groups table. | |
5175 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
5176 | can collapse the search space by grouping them by stmt_list. | |
5177 | The savings can be significant, in the same program from above the 200K TUs | |
5178 | share 8K stmt_list tables. | |
5179 | ||
5180 | FUNC is expected to call get_type_unit_group, which will create the | |
5181 | struct type_unit_group if necessary and add it to | |
5182 | dwarf2_per_objfile->type_unit_groups. */ | |
5183 | ||
5184 | static void | |
5185 | build_type_unit_groups (die_reader_func_ftype *func, void *data) | |
5186 | { | |
5187 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5188 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5189 | struct cleanup *cleanups; | |
5190 | struct abbrev_table *abbrev_table; | |
5191 | sect_offset abbrev_offset; | |
5192 | struct tu_abbrev_offset *sorted_by_abbrev; | |
5193 | struct type_unit_group **iter; | |
5194 | int i; | |
5195 | ||
5196 | /* It's up to the caller to not call us multiple times. */ | |
5197 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
5198 | ||
5199 | if (dwarf2_per_objfile->n_type_units == 0) | |
5200 | return; | |
5201 | ||
5202 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
5203 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
5204 | read each abbrev table in. | |
5205 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
5206 | This is simpler and efficient enough for now. | |
5207 | ||
5208 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
5209 | symtab to use). Typically TUs with the same abbrev offset have the same | |
5210 | stmt_list value too so in practice this should work well. | |
5211 | ||
5212 | The basic algorithm here is: | |
5213 | ||
5214 | sort TUs by abbrev table | |
5215 | for each TU with same abbrev table: | |
5216 | read abbrev table if first user | |
5217 | read TU top level DIE | |
5218 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
5219 | call FUNC */ | |
5220 | ||
5221 | if (dwarf2_read_debug) | |
5222 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
5223 | ||
5224 | /* Sort in a separate table to maintain the order of all_type_units | |
5225 | for .gdb_index: TU indices directly index all_type_units. */ | |
5226 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
5227 | dwarf2_per_objfile->n_type_units); | |
5228 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5229 | { | |
5230 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
5231 | ||
5232 | sorted_by_abbrev[i].sig_type = sig_type; | |
5233 | sorted_by_abbrev[i].abbrev_offset = | |
8a0459fd | 5234 | read_abbrev_offset (sig_type->per_cu.section, |
f4dc4d17 DE |
5235 | sig_type->per_cu.offset); |
5236 | } | |
5237 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
5238 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
5239 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
5240 | ||
094b34ac DE |
5241 | /* Note: In the .gdb_index case, get_type_unit_group may have already been |
5242 | called any number of times, so we don't reset tu_stats here. */ | |
5243 | ||
f4dc4d17 DE |
5244 | abbrev_offset.sect_off = ~(unsigned) 0; |
5245 | abbrev_table = NULL; | |
5246 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
5247 | ||
5248 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5249 | { | |
5250 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
5251 | ||
5252 | /* Switch to the next abbrev table if necessary. */ | |
5253 | if (abbrev_table == NULL | |
5254 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
5255 | { | |
5256 | if (abbrev_table != NULL) | |
5257 | { | |
5258 | abbrev_table_free (abbrev_table); | |
5259 | /* Reset to NULL in case abbrev_table_read_table throws | |
5260 | an error: abbrev_table_free_cleanup will get called. */ | |
5261 | abbrev_table = NULL; | |
5262 | } | |
5263 | abbrev_offset = tu->abbrev_offset; | |
5264 | abbrev_table = | |
5265 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
5266 | abbrev_offset); | |
5267 | ++tu_stats->nr_uniq_abbrev_tables; | |
5268 | } | |
5269 | ||
5270 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
5271 | func, data); | |
5272 | } | |
5273 | ||
5274 | /* Create a vector of pointers to primary type units to make it easy to | |
5275 | iterate over them and CUs. See dw2_get_primary_cu. */ | |
5276 | dwarf2_per_objfile->n_type_unit_groups = | |
5277 | htab_elements (dwarf2_per_objfile->type_unit_groups); | |
5278 | dwarf2_per_objfile->all_type_unit_groups = | |
5279 | obstack_alloc (&objfile->objfile_obstack, | |
5280 | dwarf2_per_objfile->n_type_unit_groups | |
5281 | * sizeof (struct type_unit_group *)); | |
5282 | iter = &dwarf2_per_objfile->all_type_unit_groups[0]; | |
5283 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5284 | add_type_unit_group_to_table, &iter); | |
5285 | gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0] | |
5286 | == dwarf2_per_objfile->n_type_unit_groups); | |
5287 | ||
5288 | do_cleanups (cleanups); | |
5289 | ||
5290 | if (dwarf2_read_debug) | |
5291 | { | |
5292 | fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n"); | |
5293 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
5294 | dwarf2_per_objfile->n_type_units); | |
5295 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
5296 | tu_stats->nr_uniq_abbrev_tables); | |
5297 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
5298 | tu_stats->nr_symtabs); | |
5299 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
5300 | tu_stats->nr_symtab_sharers); | |
5301 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
5302 | tu_stats->nr_stmt_less_type_units); | |
5303 | } | |
5304 | } | |
0018ea6f DE |
5305 | \f |
5306 | /* Partial symbol tables. */ | |
5307 | ||
5308 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5309 | ||
5310 | The caller must fill in the following details: | |
5311 | dirname, textlow, texthigh. */ | |
5312 | ||
5313 | static struct partial_symtab * | |
5314 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5315 | { | |
5316 | struct objfile *objfile = per_cu->objfile; | |
5317 | struct partial_symtab *pst; | |
5318 | ||
5319 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
5320 | name, 0, | |
5321 | objfile->global_psymbols.next, | |
5322 | objfile->static_psymbols.next); | |
5323 | ||
5324 | pst->psymtabs_addrmap_supported = 1; | |
5325 | ||
5326 | /* This is the glue that links PST into GDB's symbol API. */ | |
5327 | pst->read_symtab_private = per_cu; | |
5328 | pst->read_symtab = dwarf2_read_symtab; | |
5329 | per_cu->v.psymtab = pst; | |
5330 | ||
5331 | return pst; | |
5332 | } | |
5333 | ||
5334 | /* die_reader_func for process_psymtab_comp_unit. */ | |
5335 | ||
5336 | static void | |
5337 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5338 | const gdb_byte *info_ptr, |
0018ea6f DE |
5339 | struct die_info *comp_unit_die, |
5340 | int has_children, | |
5341 | void *data) | |
5342 | { | |
5343 | struct dwarf2_cu *cu = reader->cu; | |
5344 | struct objfile *objfile = cu->objfile; | |
5345 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
5346 | struct attribute *attr; | |
5347 | CORE_ADDR baseaddr; | |
5348 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5349 | struct partial_symtab *pst; | |
5350 | int has_pc_info; | |
5351 | const char *filename; | |
5352 | int *want_partial_unit_ptr = data; | |
5353 | ||
5354 | if (comp_unit_die->tag == DW_TAG_partial_unit | |
5355 | && (want_partial_unit_ptr == NULL | |
5356 | || !*want_partial_unit_ptr)) | |
5357 | return; | |
5358 | ||
5359 | gdb_assert (! per_cu->is_debug_types); | |
5360 | ||
5361 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); | |
5362 | ||
5363 | cu->list_in_scope = &file_symbols; | |
5364 | ||
5365 | /* Allocate a new partial symbol table structure. */ | |
5366 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
5367 | if (attr == NULL || !DW_STRING (attr)) | |
5368 | filename = ""; | |
5369 | else | |
5370 | filename = DW_STRING (attr); | |
5371 | ||
5372 | pst = create_partial_symtab (per_cu, filename); | |
5373 | ||
5374 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
5375 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5376 | if (attr != NULL) | |
5377 | pst->dirname = DW_STRING (attr); | |
5378 | ||
5379 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5380 | ||
5381 | dwarf2_find_base_address (comp_unit_die, cu); | |
5382 | ||
5383 | /* Possibly set the default values of LOWPC and HIGHPC from | |
5384 | `DW_AT_ranges'. */ | |
5385 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, | |
5386 | &best_highpc, cu, pst); | |
5387 | if (has_pc_info == 1 && best_lowpc < best_highpc) | |
5388 | /* Store the contiguous range if it is not empty; it can be empty for | |
5389 | CUs with no code. */ | |
5390 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
5391 | best_lowpc + baseaddr, | |
5392 | best_highpc + baseaddr - 1, pst); | |
5393 | ||
5394 | /* Check if comp unit has_children. | |
5395 | If so, read the rest of the partial symbols from this comp unit. | |
5396 | If not, there's no more debug_info for this comp unit. */ | |
5397 | if (has_children) | |
5398 | { | |
5399 | struct partial_die_info *first_die; | |
5400 | CORE_ADDR lowpc, highpc; | |
5401 | ||
5402 | lowpc = ((CORE_ADDR) -1); | |
5403 | highpc = ((CORE_ADDR) 0); | |
5404 | ||
5405 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5406 | ||
5407 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
5408 | ! has_pc_info, cu); | |
5409 | ||
5410 | /* If we didn't find a lowpc, set it to highpc to avoid | |
5411 | complaints from `maint check'. */ | |
5412 | if (lowpc == ((CORE_ADDR) -1)) | |
5413 | lowpc = highpc; | |
5414 | ||
5415 | /* If the compilation unit didn't have an explicit address range, | |
5416 | then use the information extracted from its child dies. */ | |
5417 | if (! has_pc_info) | |
5418 | { | |
5419 | best_lowpc = lowpc; | |
5420 | best_highpc = highpc; | |
5421 | } | |
5422 | } | |
5423 | pst->textlow = best_lowpc + baseaddr; | |
5424 | pst->texthigh = best_highpc + baseaddr; | |
5425 | ||
5426 | pst->n_global_syms = objfile->global_psymbols.next - | |
5427 | (objfile->global_psymbols.list + pst->globals_offset); | |
5428 | pst->n_static_syms = objfile->static_psymbols.next - | |
5429 | (objfile->static_psymbols.list + pst->statics_offset); | |
5430 | sort_pst_symbols (objfile, pst); | |
5431 | ||
5432 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
5433 | { | |
5434 | int i; | |
5435 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5436 | struct dwarf2_per_cu_data *iter; | |
5437 | ||
5438 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
5439 | post-pass. */ | |
5440 | pst->number_of_dependencies = len; | |
5441 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5442 | len * sizeof (struct symtab *)); | |
5443 | for (i = 0; | |
5444 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
5445 | i, iter); | |
5446 | ++i) | |
5447 | pst->dependencies[i] = iter->v.psymtab; | |
5448 | ||
5449 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5450 | } | |
5451 | ||
5452 | /* Get the list of files included in the current compilation unit, | |
5453 | and build a psymtab for each of them. */ | |
5454 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
5455 | ||
5456 | if (dwarf2_read_debug) | |
5457 | { | |
5458 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
5459 | ||
5460 | fprintf_unfiltered (gdb_stdlog, | |
5461 | "Psymtab for %s unit @0x%x: %s - %s" | |
5462 | ", %d global, %d static syms\n", | |
5463 | per_cu->is_debug_types ? "type" : "comp", | |
5464 | per_cu->offset.sect_off, | |
5465 | paddress (gdbarch, pst->textlow), | |
5466 | paddress (gdbarch, pst->texthigh), | |
5467 | pst->n_global_syms, pst->n_static_syms); | |
5468 | } | |
5469 | } | |
5470 | ||
5471 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5472 | Process compilation unit THIS_CU for a psymtab. */ | |
5473 | ||
5474 | static void | |
5475 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
5476 | int want_partial_unit) | |
5477 | { | |
5478 | /* If this compilation unit was already read in, free the | |
5479 | cached copy in order to read it in again. This is | |
5480 | necessary because we skipped some symbols when we first | |
5481 | read in the compilation unit (see load_partial_dies). | |
5482 | This problem could be avoided, but the benefit is unclear. */ | |
5483 | if (this_cu->cu != NULL) | |
5484 | free_one_cached_comp_unit (this_cu); | |
5485 | ||
5486 | gdb_assert (! this_cu->is_debug_types); | |
5487 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
5488 | process_psymtab_comp_unit_reader, | |
5489 | &want_partial_unit); | |
5490 | ||
5491 | /* Age out any secondary CUs. */ | |
5492 | age_cached_comp_units (); | |
5493 | } | |
f4dc4d17 DE |
5494 | |
5495 | /* Reader function for build_type_psymtabs. */ | |
5496 | ||
5497 | static void | |
5498 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5499 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
5500 | struct die_info *type_unit_die, |
5501 | int has_children, | |
5502 | void *data) | |
5503 | { | |
5504 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5505 | struct dwarf2_cu *cu = reader->cu; | |
5506 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 5507 | struct signatured_type *sig_type; |
f4dc4d17 DE |
5508 | struct type_unit_group *tu_group; |
5509 | struct attribute *attr; | |
5510 | struct partial_die_info *first_die; | |
5511 | CORE_ADDR lowpc, highpc; | |
5512 | struct partial_symtab *pst; | |
5513 | ||
5514 | gdb_assert (data == NULL); | |
0186c6a7 DE |
5515 | gdb_assert (per_cu->is_debug_types); |
5516 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
5517 | |
5518 | if (! has_children) | |
5519 | return; | |
5520 | ||
5521 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 5522 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 5523 | |
0186c6a7 | 5524 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
5525 | |
5526 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
5527 | cu->list_in_scope = &file_symbols; | |
5528 | pst = create_partial_symtab (per_cu, ""); | |
5529 | pst->anonymous = 1; | |
5530 | ||
5531 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5532 | ||
5533 | lowpc = (CORE_ADDR) -1; | |
5534 | highpc = (CORE_ADDR) 0; | |
5535 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
5536 | ||
5537 | pst->n_global_syms = objfile->global_psymbols.next - | |
5538 | (objfile->global_psymbols.list + pst->globals_offset); | |
5539 | pst->n_static_syms = objfile->static_psymbols.next - | |
5540 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 5541 | sort_pst_symbols (objfile, pst); |
f4dc4d17 DE |
5542 | } |
5543 | ||
5544 | /* Traversal function for build_type_psymtabs. */ | |
5545 | ||
5546 | static int | |
5547 | build_type_psymtab_dependencies (void **slot, void *info) | |
5548 | { | |
5549 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5550 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 5551 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 5552 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
5553 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
5554 | struct signatured_type *iter; | |
f4dc4d17 DE |
5555 | int i; |
5556 | ||
5557 | gdb_assert (len > 0); | |
0186c6a7 | 5558 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
5559 | |
5560 | pst->number_of_dependencies = len; | |
5561 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5562 | len * sizeof (struct psymtab *)); | |
5563 | for (i = 0; | |
0186c6a7 | 5564 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
5565 | ++i) |
5566 | { | |
0186c6a7 DE |
5567 | gdb_assert (iter->per_cu.is_debug_types); |
5568 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 5569 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
5570 | } |
5571 | ||
0186c6a7 | 5572 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
5573 | |
5574 | return 1; | |
5575 | } | |
5576 | ||
5577 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5578 | Build partial symbol tables for the .debug_types comp-units. */ | |
5579 | ||
5580 | static void | |
5581 | build_type_psymtabs (struct objfile *objfile) | |
5582 | { | |
0e50663e | 5583 | if (! create_all_type_units (objfile)) |
348e048f DE |
5584 | return; |
5585 | ||
f4dc4d17 DE |
5586 | build_type_unit_groups (build_type_psymtabs_reader, NULL); |
5587 | ||
5588 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
5589 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5590 | build_type_psymtab_dependencies, NULL); | |
348e048f DE |
5591 | } |
5592 | ||
60606b2c TT |
5593 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
5594 | ||
5595 | static void | |
5596 | psymtabs_addrmap_cleanup (void *o) | |
5597 | { | |
5598 | struct objfile *objfile = o; | |
ec61707d | 5599 | |
60606b2c TT |
5600 | objfile->psymtabs_addrmap = NULL; |
5601 | } | |
5602 | ||
95554aad TT |
5603 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
5604 | ||
5605 | static void | |
5606 | set_partial_user (struct objfile *objfile) | |
5607 | { | |
5608 | int i; | |
5609 | ||
5610 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5611 | { | |
5612 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5613 | struct partial_symtab *pst = per_cu->v.psymtab; | |
5614 | int j; | |
5615 | ||
36586728 TT |
5616 | if (pst == NULL) |
5617 | continue; | |
5618 | ||
95554aad TT |
5619 | for (j = 0; j < pst->number_of_dependencies; ++j) |
5620 | { | |
5621 | /* Set the 'user' field only if it is not already set. */ | |
5622 | if (pst->dependencies[j]->user == NULL) | |
5623 | pst->dependencies[j]->user = pst; | |
5624 | } | |
5625 | } | |
5626 | } | |
5627 | ||
93311388 DE |
5628 | /* Build the partial symbol table by doing a quick pass through the |
5629 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 5630 | |
93311388 | 5631 | static void |
c67a9c90 | 5632 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 5633 | { |
60606b2c TT |
5634 | struct cleanup *back_to, *addrmap_cleanup; |
5635 | struct obstack temp_obstack; | |
21b2bd31 | 5636 | int i; |
93311388 | 5637 | |
45cfd468 DE |
5638 | if (dwarf2_read_debug) |
5639 | { | |
5640 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
5641 | objfile->name); | |
5642 | } | |
5643 | ||
98bfdba5 PA |
5644 | dwarf2_per_objfile->reading_partial_symbols = 1; |
5645 | ||
be391dca | 5646 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 5647 | |
93311388 DE |
5648 | /* Any cached compilation units will be linked by the per-objfile |
5649 | read_in_chain. Make sure to free them when we're done. */ | |
5650 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 5651 | |
348e048f DE |
5652 | build_type_psymtabs (objfile); |
5653 | ||
93311388 | 5654 | create_all_comp_units (objfile); |
c906108c | 5655 | |
60606b2c TT |
5656 | /* Create a temporary address map on a temporary obstack. We later |
5657 | copy this to the final obstack. */ | |
5658 | obstack_init (&temp_obstack); | |
5659 | make_cleanup_obstack_free (&temp_obstack); | |
5660 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
5661 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 5662 | |
21b2bd31 | 5663 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 5664 | { |
21b2bd31 | 5665 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
aaa75496 | 5666 | |
95554aad | 5667 | process_psymtab_comp_unit (per_cu, 0); |
c906108c | 5668 | } |
ff013f42 | 5669 | |
95554aad TT |
5670 | set_partial_user (objfile); |
5671 | ||
ff013f42 JK |
5672 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
5673 | &objfile->objfile_obstack); | |
60606b2c | 5674 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 5675 | |
ae038cb0 | 5676 | do_cleanups (back_to); |
45cfd468 DE |
5677 | |
5678 | if (dwarf2_read_debug) | |
5679 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
5680 | objfile->name); | |
ae038cb0 DJ |
5681 | } |
5682 | ||
3019eac3 | 5683 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
5684 | |
5685 | static void | |
dee91e82 | 5686 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 5687 | const gdb_byte *info_ptr, |
dee91e82 DE |
5688 | struct die_info *comp_unit_die, |
5689 | int has_children, | |
5690 | void *data) | |
ae038cb0 | 5691 | { |
dee91e82 | 5692 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 5693 | |
95554aad | 5694 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 5695 | |
ae038cb0 DJ |
5696 | /* Check if comp unit has_children. |
5697 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 5698 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 5699 | if (has_children) |
dee91e82 DE |
5700 | load_partial_dies (reader, info_ptr, 0); |
5701 | } | |
98bfdba5 | 5702 | |
dee91e82 DE |
5703 | /* Load the partial DIEs for a secondary CU into memory. |
5704 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 5705 | |
dee91e82 DE |
5706 | static void |
5707 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
5708 | { | |
f4dc4d17 DE |
5709 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
5710 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
5711 | } |
5712 | ||
ae038cb0 | 5713 | static void |
36586728 TT |
5714 | read_comp_units_from_section (struct objfile *objfile, |
5715 | struct dwarf2_section_info *section, | |
5716 | unsigned int is_dwz, | |
5717 | int *n_allocated, | |
5718 | int *n_comp_units, | |
5719 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 5720 | { |
d521ce57 | 5721 | const gdb_byte *info_ptr; |
36586728 | 5722 | bfd *abfd = section->asection->owner; |
be391dca | 5723 | |
bf6af496 DE |
5724 | if (dwarf2_read_debug) |
5725 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", | |
5726 | section->asection->name, bfd_get_filename (abfd)); | |
5727 | ||
36586728 | 5728 | dwarf2_read_section (objfile, section); |
ae038cb0 | 5729 | |
36586728 | 5730 | info_ptr = section->buffer; |
6e70227d | 5731 | |
36586728 | 5732 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 5733 | { |
c764a876 | 5734 | unsigned int length, initial_length_size; |
ae038cb0 | 5735 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 5736 | sect_offset offset; |
ae038cb0 | 5737 | |
36586728 | 5738 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
5739 | |
5740 | /* Read just enough information to find out where the next | |
5741 | compilation unit is. */ | |
36586728 | 5742 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
5743 | |
5744 | /* Save the compilation unit for later lookup. */ | |
5745 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
5746 | sizeof (struct dwarf2_per_cu_data)); | |
5747 | memset (this_cu, 0, sizeof (*this_cu)); | |
5748 | this_cu->offset = offset; | |
c764a876 | 5749 | this_cu->length = length + initial_length_size; |
36586728 | 5750 | this_cu->is_dwz = is_dwz; |
9291a0cd | 5751 | this_cu->objfile = objfile; |
8a0459fd | 5752 | this_cu->section = section; |
ae038cb0 | 5753 | |
36586728 | 5754 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 5755 | { |
36586728 TT |
5756 | *n_allocated *= 2; |
5757 | *all_comp_units = xrealloc (*all_comp_units, | |
5758 | *n_allocated | |
5759 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 5760 | } |
36586728 TT |
5761 | (*all_comp_units)[*n_comp_units] = this_cu; |
5762 | ++*n_comp_units; | |
ae038cb0 DJ |
5763 | |
5764 | info_ptr = info_ptr + this_cu->length; | |
5765 | } | |
36586728 TT |
5766 | } |
5767 | ||
5768 | /* Create a list of all compilation units in OBJFILE. | |
5769 | This is only done for -readnow and building partial symtabs. */ | |
5770 | ||
5771 | static void | |
5772 | create_all_comp_units (struct objfile *objfile) | |
5773 | { | |
5774 | int n_allocated; | |
5775 | int n_comp_units; | |
5776 | struct dwarf2_per_cu_data **all_comp_units; | |
5777 | ||
5778 | n_comp_units = 0; | |
5779 | n_allocated = 10; | |
5780 | all_comp_units = xmalloc (n_allocated | |
5781 | * sizeof (struct dwarf2_per_cu_data *)); | |
5782 | ||
5783 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
5784 | &n_allocated, &n_comp_units, &all_comp_units); | |
5785 | ||
5786 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
5787 | { | |
5788 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
5789 | ||
5790 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
5791 | &n_allocated, &n_comp_units, | |
5792 | &all_comp_units); | |
5793 | } | |
ae038cb0 DJ |
5794 | |
5795 | dwarf2_per_objfile->all_comp_units | |
5796 | = obstack_alloc (&objfile->objfile_obstack, | |
5797 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5798 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
5799 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5800 | xfree (all_comp_units); | |
5801 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
5802 | } |
5803 | ||
5734ee8b DJ |
5804 | /* Process all loaded DIEs for compilation unit CU, starting at |
5805 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
5806 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
5807 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
5808 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
5809 | and record the covered ranges in the addrmap. */ | |
c906108c | 5810 | |
72bf9492 DJ |
5811 | static void |
5812 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 5813 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 5814 | { |
72bf9492 | 5815 | struct partial_die_info *pdi; |
c906108c | 5816 | |
91c24f0a DC |
5817 | /* Now, march along the PDI's, descending into ones which have |
5818 | interesting children but skipping the children of the other ones, | |
5819 | until we reach the end of the compilation unit. */ | |
c906108c | 5820 | |
72bf9492 | 5821 | pdi = first_die; |
91c24f0a | 5822 | |
72bf9492 DJ |
5823 | while (pdi != NULL) |
5824 | { | |
5825 | fixup_partial_die (pdi, cu); | |
c906108c | 5826 | |
f55ee35c | 5827 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
5828 | children, so we need to look at them. Ditto for anonymous |
5829 | enums. */ | |
933c6fe4 | 5830 | |
72bf9492 | 5831 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
5832 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
5833 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 5834 | { |
72bf9492 | 5835 | switch (pdi->tag) |
c906108c SS |
5836 | { |
5837 | case DW_TAG_subprogram: | |
5734ee8b | 5838 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c | 5839 | break; |
72929c62 | 5840 | case DW_TAG_constant: |
c906108c SS |
5841 | case DW_TAG_variable: |
5842 | case DW_TAG_typedef: | |
91c24f0a | 5843 | case DW_TAG_union_type: |
72bf9492 | 5844 | if (!pdi->is_declaration) |
63d06c5c | 5845 | { |
72bf9492 | 5846 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
5847 | } |
5848 | break; | |
c906108c | 5849 | case DW_TAG_class_type: |
680b30c7 | 5850 | case DW_TAG_interface_type: |
c906108c | 5851 | case DW_TAG_structure_type: |
72bf9492 | 5852 | if (!pdi->is_declaration) |
c906108c | 5853 | { |
72bf9492 | 5854 | add_partial_symbol (pdi, cu); |
c906108c SS |
5855 | } |
5856 | break; | |
91c24f0a | 5857 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
5858 | if (!pdi->is_declaration) |
5859 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
5860 | break; |
5861 | case DW_TAG_base_type: | |
a02abb62 | 5862 | case DW_TAG_subrange_type: |
c906108c | 5863 | /* File scope base type definitions are added to the partial |
c5aa993b | 5864 | symbol table. */ |
72bf9492 | 5865 | add_partial_symbol (pdi, cu); |
c906108c | 5866 | break; |
d9fa45fe | 5867 | case DW_TAG_namespace: |
5734ee8b | 5868 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 5869 | break; |
5d7cb8df JK |
5870 | case DW_TAG_module: |
5871 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
5872 | break; | |
95554aad TT |
5873 | case DW_TAG_imported_unit: |
5874 | { | |
5875 | struct dwarf2_per_cu_data *per_cu; | |
5876 | ||
f4dc4d17 DE |
5877 | /* For now we don't handle imported units in type units. */ |
5878 | if (cu->per_cu->is_debug_types) | |
5879 | { | |
5880 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
5881 | " supported in type units [in module %s]"), | |
5882 | cu->objfile->name); | |
5883 | } | |
5884 | ||
95554aad | 5885 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 5886 | pdi->is_dwz, |
95554aad TT |
5887 | cu->objfile); |
5888 | ||
5889 | /* Go read the partial unit, if needed. */ | |
5890 | if (per_cu->v.psymtab == NULL) | |
5891 | process_psymtab_comp_unit (per_cu, 1); | |
5892 | ||
f4dc4d17 | 5893 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 5894 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
5895 | } |
5896 | break; | |
c906108c SS |
5897 | default: |
5898 | break; | |
5899 | } | |
5900 | } | |
5901 | ||
72bf9492 DJ |
5902 | /* If the die has a sibling, skip to the sibling. */ |
5903 | ||
5904 | pdi = pdi->die_sibling; | |
5905 | } | |
5906 | } | |
5907 | ||
5908 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 5909 | |
72bf9492 | 5910 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
5911 | name is concatenated with "::" and the partial DIE's name. For |
5912 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
5913 | Enumerators are an exception; they use the scope of their parent |
5914 | enumeration type, i.e. the name of the enumeration type is not | |
5915 | prepended to the enumerator. | |
91c24f0a | 5916 | |
72bf9492 DJ |
5917 | There are two complexities. One is DW_AT_specification; in this |
5918 | case "parent" means the parent of the target of the specification, | |
5919 | instead of the direct parent of the DIE. The other is compilers | |
5920 | which do not emit DW_TAG_namespace; in this case we try to guess | |
5921 | the fully qualified name of structure types from their members' | |
5922 | linkage names. This must be done using the DIE's children rather | |
5923 | than the children of any DW_AT_specification target. We only need | |
5924 | to do this for structures at the top level, i.e. if the target of | |
5925 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
5926 | have a parent. */ | |
5927 | ||
5928 | /* Compute the scope prefix associated with PDI's parent, in | |
5929 | compilation unit CU. The result will be allocated on CU's | |
5930 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
5931 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 5932 | static const char * |
72bf9492 DJ |
5933 | partial_die_parent_scope (struct partial_die_info *pdi, |
5934 | struct dwarf2_cu *cu) | |
5935 | { | |
15d034d0 | 5936 | const char *grandparent_scope; |
72bf9492 | 5937 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 5938 | |
72bf9492 DJ |
5939 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
5940 | then this means the parent of the specification DIE. */ | |
5941 | ||
5942 | real_pdi = pdi; | |
72bf9492 | 5943 | while (real_pdi->has_specification) |
36586728 TT |
5944 | real_pdi = find_partial_die (real_pdi->spec_offset, |
5945 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
5946 | |
5947 | parent = real_pdi->die_parent; | |
5948 | if (parent == NULL) | |
5949 | return NULL; | |
5950 | ||
5951 | if (parent->scope_set) | |
5952 | return parent->scope; | |
5953 | ||
5954 | fixup_partial_die (parent, cu); | |
5955 | ||
10b3939b | 5956 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 5957 | |
acebe513 UW |
5958 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
5959 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
5960 | Work around this problem here. */ | |
5961 | if (cu->language == language_cplus | |
6e70227d | 5962 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
5963 | && strcmp (parent->name, "::") == 0 |
5964 | && grandparent_scope == NULL) | |
5965 | { | |
5966 | parent->scope = NULL; | |
5967 | parent->scope_set = 1; | |
5968 | return NULL; | |
5969 | } | |
5970 | ||
9c6c53f7 SA |
5971 | if (pdi->tag == DW_TAG_enumerator) |
5972 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
5973 | parent->scope = grandparent_scope; | |
5974 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 5975 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
5976 | || parent->tag == DW_TAG_structure_type |
5977 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 5978 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
5979 | || parent->tag == DW_TAG_union_type |
5980 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
5981 | { |
5982 | if (grandparent_scope == NULL) | |
5983 | parent->scope = parent->name; | |
5984 | else | |
3e43a32a MS |
5985 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
5986 | grandparent_scope, | |
f55ee35c | 5987 | parent->name, 0, cu); |
72bf9492 | 5988 | } |
72bf9492 DJ |
5989 | else |
5990 | { | |
5991 | /* FIXME drow/2004-04-01: What should we be doing with | |
5992 | function-local names? For partial symbols, we should probably be | |
5993 | ignoring them. */ | |
5994 | complaint (&symfile_complaints, | |
e2e0b3e5 | 5995 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 5996 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 5997 | parent->scope = grandparent_scope; |
c906108c SS |
5998 | } |
5999 | ||
72bf9492 DJ |
6000 | parent->scope_set = 1; |
6001 | return parent->scope; | |
6002 | } | |
6003 | ||
6004 | /* Return the fully scoped name associated with PDI, from compilation unit | |
6005 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 6006 | |
72bf9492 DJ |
6007 | static char * |
6008 | partial_die_full_name (struct partial_die_info *pdi, | |
6009 | struct dwarf2_cu *cu) | |
6010 | { | |
15d034d0 | 6011 | const char *parent_scope; |
72bf9492 | 6012 | |
98bfdba5 PA |
6013 | /* If this is a template instantiation, we can not work out the |
6014 | template arguments from partial DIEs. So, unfortunately, we have | |
6015 | to go through the full DIEs. At least any work we do building | |
6016 | types here will be reused if full symbols are loaded later. */ | |
6017 | if (pdi->has_template_arguments) | |
6018 | { | |
6019 | fixup_partial_die (pdi, cu); | |
6020 | ||
6021 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6022 | { | |
6023 | struct die_info *die; | |
6024 | struct attribute attr; | |
6025 | struct dwarf2_cu *ref_cu = cu; | |
6026 | ||
b64f50a1 | 6027 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
6028 | attr.name = 0; |
6029 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 6030 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6031 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6032 | ||
6033 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6034 | } | |
6035 | } | |
6036 | ||
72bf9492 DJ |
6037 | parent_scope = partial_die_parent_scope (pdi, cu); |
6038 | if (parent_scope == NULL) | |
6039 | return NULL; | |
6040 | else | |
f55ee35c | 6041 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6042 | } |
6043 | ||
6044 | static void | |
72bf9492 | 6045 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6046 | { |
e7c27a73 | 6047 | struct objfile *objfile = cu->objfile; |
c906108c | 6048 | CORE_ADDR addr = 0; |
15d034d0 | 6049 | const char *actual_name = NULL; |
e142c38c | 6050 | CORE_ADDR baseaddr; |
15d034d0 | 6051 | char *built_actual_name; |
e142c38c DJ |
6052 | |
6053 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6054 | |
15d034d0 TT |
6055 | built_actual_name = partial_die_full_name (pdi, cu); |
6056 | if (built_actual_name != NULL) | |
6057 | actual_name = built_actual_name; | |
63d06c5c | 6058 | |
72bf9492 DJ |
6059 | if (actual_name == NULL) |
6060 | actual_name = pdi->name; | |
6061 | ||
c906108c SS |
6062 | switch (pdi->tag) |
6063 | { | |
6064 | case DW_TAG_subprogram: | |
2cfa0c8d | 6065 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6066 | { |
2cfa0c8d JB |
6067 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6068 | of the global scope. But in Ada, we want to be able to access | |
6069 | nested procedures globally. So all Ada subprograms are stored | |
6070 | in the global scope. */ | |
f47fb265 | 6071 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6072 | mst_text, objfile); */ |
f47fb265 | 6073 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6074 | built_actual_name != NULL, |
f47fb265 MS |
6075 | VAR_DOMAIN, LOC_BLOCK, |
6076 | &objfile->global_psymbols, | |
6077 | 0, pdi->lowpc + baseaddr, | |
6078 | cu->language, objfile); | |
c906108c SS |
6079 | } |
6080 | else | |
6081 | { | |
f47fb265 | 6082 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6083 | mst_file_text, objfile); */ |
f47fb265 | 6084 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6085 | built_actual_name != NULL, |
f47fb265 MS |
6086 | VAR_DOMAIN, LOC_BLOCK, |
6087 | &objfile->static_psymbols, | |
6088 | 0, pdi->lowpc + baseaddr, | |
6089 | cu->language, objfile); | |
c906108c SS |
6090 | } |
6091 | break; | |
72929c62 JB |
6092 | case DW_TAG_constant: |
6093 | { | |
6094 | struct psymbol_allocation_list *list; | |
6095 | ||
6096 | if (pdi->is_external) | |
6097 | list = &objfile->global_psymbols; | |
6098 | else | |
6099 | list = &objfile->static_psymbols; | |
f47fb265 | 6100 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6101 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
f47fb265 | 6102 | list, 0, 0, cu->language, objfile); |
72929c62 JB |
6103 | } |
6104 | break; | |
c906108c | 6105 | case DW_TAG_variable: |
95554aad TT |
6106 | if (pdi->d.locdesc) |
6107 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6108 | |
95554aad | 6109 | if (pdi->d.locdesc |
caac4577 JG |
6110 | && addr == 0 |
6111 | && !dwarf2_per_objfile->has_section_at_zero) | |
6112 | { | |
6113 | /* A global or static variable may also have been stripped | |
6114 | out by the linker if unused, in which case its address | |
6115 | will be nullified; do not add such variables into partial | |
6116 | symbol table then. */ | |
6117 | } | |
6118 | else if (pdi->is_external) | |
c906108c SS |
6119 | { |
6120 | /* Global Variable. | |
6121 | Don't enter into the minimal symbol tables as there is | |
6122 | a minimal symbol table entry from the ELF symbols already. | |
6123 | Enter into partial symbol table if it has a location | |
6124 | descriptor or a type. | |
6125 | If the location descriptor is missing, new_symbol will create | |
6126 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6127 | be determined from the minimal symbol table whenever the variable | |
6128 | is referenced. | |
6129 | The address for the partial symbol table entry is not | |
6130 | used by GDB, but it comes in handy for debugging partial symbol | |
6131 | table building. */ | |
6132 | ||
95554aad | 6133 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6134 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6135 | built_actual_name != NULL, |
f47fb265 MS |
6136 | VAR_DOMAIN, LOC_STATIC, |
6137 | &objfile->global_psymbols, | |
6138 | 0, addr + baseaddr, | |
6139 | cu->language, objfile); | |
c906108c SS |
6140 | } |
6141 | else | |
6142 | { | |
0963b4bd | 6143 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 6144 | if (pdi->d.locdesc == NULL) |
decbce07 | 6145 | { |
15d034d0 | 6146 | xfree (built_actual_name); |
decbce07 MS |
6147 | return; |
6148 | } | |
f47fb265 | 6149 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 6150 | mst_file_data, objfile); */ |
f47fb265 | 6151 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6152 | built_actual_name != NULL, |
f47fb265 MS |
6153 | VAR_DOMAIN, LOC_STATIC, |
6154 | &objfile->static_psymbols, | |
6155 | 0, addr + baseaddr, | |
6156 | cu->language, objfile); | |
c906108c SS |
6157 | } |
6158 | break; | |
6159 | case DW_TAG_typedef: | |
6160 | case DW_TAG_base_type: | |
a02abb62 | 6161 | case DW_TAG_subrange_type: |
38d518c9 | 6162 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6163 | built_actual_name != NULL, |
176620f1 | 6164 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 6165 | &objfile->static_psymbols, |
e142c38c | 6166 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6167 | break; |
72bf9492 DJ |
6168 | case DW_TAG_namespace: |
6169 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 6170 | built_actual_name != NULL, |
72bf9492 DJ |
6171 | VAR_DOMAIN, LOC_TYPEDEF, |
6172 | &objfile->global_psymbols, | |
6173 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6174 | break; | |
c906108c | 6175 | case DW_TAG_class_type: |
680b30c7 | 6176 | case DW_TAG_interface_type: |
c906108c SS |
6177 | case DW_TAG_structure_type: |
6178 | case DW_TAG_union_type: | |
6179 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
6180 | /* Skip external references. The DWARF standard says in the section |
6181 | about "Structure, Union, and Class Type Entries": "An incomplete | |
6182 | structure, union or class type is represented by a structure, | |
6183 | union or class entry that does not have a byte size attribute | |
6184 | and that has a DW_AT_declaration attribute." */ | |
6185 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 6186 | { |
15d034d0 | 6187 | xfree (built_actual_name); |
decbce07 MS |
6188 | return; |
6189 | } | |
fa4028e9 | 6190 | |
63d06c5c DC |
6191 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
6192 | static vs. global. */ | |
38d518c9 | 6193 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6194 | built_actual_name != NULL, |
176620f1 | 6195 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
6196 | (cu->language == language_cplus |
6197 | || cu->language == language_java) | |
63d06c5c DC |
6198 | ? &objfile->global_psymbols |
6199 | : &objfile->static_psymbols, | |
e142c38c | 6200 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6201 | |
c906108c SS |
6202 | break; |
6203 | case DW_TAG_enumerator: | |
38d518c9 | 6204 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6205 | built_actual_name != NULL, |
176620f1 | 6206 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
6207 | (cu->language == language_cplus |
6208 | || cu->language == language_java) | |
f6fe98ef DJ |
6209 | ? &objfile->global_psymbols |
6210 | : &objfile->static_psymbols, | |
e142c38c | 6211 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
6212 | break; |
6213 | default: | |
6214 | break; | |
6215 | } | |
5c4e30ca | 6216 | |
15d034d0 | 6217 | xfree (built_actual_name); |
c906108c SS |
6218 | } |
6219 | ||
5c4e30ca DC |
6220 | /* Read a partial die corresponding to a namespace; also, add a symbol |
6221 | corresponding to that namespace to the symbol table. NAMESPACE is | |
6222 | the name of the enclosing namespace. */ | |
91c24f0a | 6223 | |
72bf9492 DJ |
6224 | static void |
6225 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6226 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 6227 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 6228 | { |
72bf9492 | 6229 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6230 | |
72bf9492 | 6231 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6232 | |
6233 | /* Now scan partial symbols in that namespace. */ | |
6234 | ||
91c24f0a | 6235 | if (pdi->has_children) |
5734ee8b | 6236 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
6237 | } |
6238 | ||
5d7cb8df JK |
6239 | /* Read a partial die corresponding to a Fortran module. */ |
6240 | ||
6241 | static void | |
6242 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
6243 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
6244 | { | |
f55ee35c | 6245 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
6246 | |
6247 | if (pdi->has_children) | |
6248 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
6249 | } | |
6250 | ||
bc30ff58 JB |
6251 | /* Read a partial die corresponding to a subprogram and create a partial |
6252 | symbol for that subprogram. When the CU language allows it, this | |
6253 | routine also defines a partial symbol for each nested subprogram | |
6254 | that this subprogram contains. | |
6e70227d | 6255 | |
bc30ff58 JB |
6256 | DIE my also be a lexical block, in which case we simply search |
6257 | recursively for suprograms defined inside that lexical block. | |
6258 | Again, this is only performed when the CU language allows this | |
6259 | type of definitions. */ | |
6260 | ||
6261 | static void | |
6262 | add_partial_subprogram (struct partial_die_info *pdi, | |
6263 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 6264 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
6265 | { |
6266 | if (pdi->tag == DW_TAG_subprogram) | |
6267 | { | |
6268 | if (pdi->has_pc_info) | |
6269 | { | |
6270 | if (pdi->lowpc < *lowpc) | |
6271 | *lowpc = pdi->lowpc; | |
6272 | if (pdi->highpc > *highpc) | |
6273 | *highpc = pdi->highpc; | |
5734ee8b DJ |
6274 | if (need_pc) |
6275 | { | |
6276 | CORE_ADDR baseaddr; | |
6277 | struct objfile *objfile = cu->objfile; | |
6278 | ||
6279 | baseaddr = ANOFFSET (objfile->section_offsets, | |
6280 | SECT_OFF_TEXT (objfile)); | |
6281 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
6282 | pdi->lowpc + baseaddr, |
6283 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 6284 | cu->per_cu->v.psymtab); |
5734ee8b | 6285 | } |
481860b3 GB |
6286 | } |
6287 | ||
6288 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
6289 | { | |
bc30ff58 | 6290 | if (!pdi->is_declaration) |
e8d05480 JB |
6291 | /* Ignore subprogram DIEs that do not have a name, they are |
6292 | illegal. Do not emit a complaint at this point, we will | |
6293 | do so when we convert this psymtab into a symtab. */ | |
6294 | if (pdi->name) | |
6295 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
6296 | } |
6297 | } | |
6e70227d | 6298 | |
bc30ff58 JB |
6299 | if (! pdi->has_children) |
6300 | return; | |
6301 | ||
6302 | if (cu->language == language_ada) | |
6303 | { | |
6304 | pdi = pdi->die_child; | |
6305 | while (pdi != NULL) | |
6306 | { | |
6307 | fixup_partial_die (pdi, cu); | |
6308 | if (pdi->tag == DW_TAG_subprogram | |
6309 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 6310 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
6311 | pdi = pdi->die_sibling; |
6312 | } | |
6313 | } | |
6314 | } | |
6315 | ||
91c24f0a DC |
6316 | /* Read a partial die corresponding to an enumeration type. */ |
6317 | ||
72bf9492 DJ |
6318 | static void |
6319 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
6320 | struct dwarf2_cu *cu) | |
91c24f0a | 6321 | { |
72bf9492 | 6322 | struct partial_die_info *pdi; |
91c24f0a DC |
6323 | |
6324 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
6325 | add_partial_symbol (enum_pdi, cu); |
6326 | ||
6327 | pdi = enum_pdi->die_child; | |
6328 | while (pdi) | |
91c24f0a | 6329 | { |
72bf9492 | 6330 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 6331 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 6332 | else |
72bf9492 DJ |
6333 | add_partial_symbol (pdi, cu); |
6334 | pdi = pdi->die_sibling; | |
91c24f0a | 6335 | } |
91c24f0a DC |
6336 | } |
6337 | ||
6caca83c CC |
6338 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
6339 | ||
6340 | static unsigned int | |
d521ce57 | 6341 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
6342 | { |
6343 | unsigned int bytes_read; | |
6344 | ||
6345 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6346 | } | |
6347 | ||
4bb7a0a7 DJ |
6348 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
6349 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
6350 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
6351 | the initial number. */ | |
6352 | ||
6353 | static struct abbrev_info * | |
d521ce57 | 6354 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 6355 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
6356 | { |
6357 | bfd *abfd = cu->objfile->obfd; | |
6358 | unsigned int abbrev_number; | |
6359 | struct abbrev_info *abbrev; | |
6360 | ||
6361 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
6362 | ||
6363 | if (abbrev_number == 0) | |
6364 | return NULL; | |
6365 | ||
433df2d4 | 6366 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
6367 | if (!abbrev) |
6368 | { | |
3e43a32a MS |
6369 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
6370 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
6371 | } |
6372 | ||
6373 | return abbrev; | |
6374 | } | |
6375 | ||
93311388 DE |
6376 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6377 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
6378 | DIE. Any children of the skipped DIEs will also be skipped. */ |
6379 | ||
d521ce57 TT |
6380 | static const gdb_byte * |
6381 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 6382 | { |
dee91e82 | 6383 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
6384 | struct abbrev_info *abbrev; |
6385 | unsigned int bytes_read; | |
6386 | ||
6387 | while (1) | |
6388 | { | |
6389 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
6390 | if (abbrev == NULL) | |
6391 | return info_ptr + bytes_read; | |
6392 | else | |
dee91e82 | 6393 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
6394 | } |
6395 | } | |
6396 | ||
93311388 DE |
6397 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6398 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
6399 | abbrev corresponding to that skipped uleb128 should be passed in |
6400 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
6401 | children. */ | |
6402 | ||
d521ce57 TT |
6403 | static const gdb_byte * |
6404 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 6405 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
6406 | { |
6407 | unsigned int bytes_read; | |
6408 | struct attribute attr; | |
dee91e82 DE |
6409 | bfd *abfd = reader->abfd; |
6410 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 6411 | const gdb_byte *buffer = reader->buffer; |
f664829e | 6412 | const gdb_byte *buffer_end = reader->buffer_end; |
d521ce57 | 6413 | const gdb_byte *start_info_ptr = info_ptr; |
4bb7a0a7 DJ |
6414 | unsigned int form, i; |
6415 | ||
6416 | for (i = 0; i < abbrev->num_attrs; i++) | |
6417 | { | |
6418 | /* The only abbrev we care about is DW_AT_sibling. */ | |
6419 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
6420 | { | |
dee91e82 | 6421 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 6422 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
6423 | complaint (&symfile_complaints, |
6424 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 6425 | else |
b64f50a1 | 6426 | return buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
4bb7a0a7 DJ |
6427 | } |
6428 | ||
6429 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
6430 | form = abbrev->attrs[i].form; | |
6431 | skip_attribute: | |
6432 | switch (form) | |
6433 | { | |
4bb7a0a7 | 6434 | case DW_FORM_ref_addr: |
ae411497 TT |
6435 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
6436 | and later it is offset sized. */ | |
6437 | if (cu->header.version == 2) | |
6438 | info_ptr += cu->header.addr_size; | |
6439 | else | |
6440 | info_ptr += cu->header.offset_size; | |
6441 | break; | |
36586728 TT |
6442 | case DW_FORM_GNU_ref_alt: |
6443 | info_ptr += cu->header.offset_size; | |
6444 | break; | |
ae411497 | 6445 | case DW_FORM_addr: |
4bb7a0a7 DJ |
6446 | info_ptr += cu->header.addr_size; |
6447 | break; | |
6448 | case DW_FORM_data1: | |
6449 | case DW_FORM_ref1: | |
6450 | case DW_FORM_flag: | |
6451 | info_ptr += 1; | |
6452 | break; | |
2dc7f7b3 TT |
6453 | case DW_FORM_flag_present: |
6454 | break; | |
4bb7a0a7 DJ |
6455 | case DW_FORM_data2: |
6456 | case DW_FORM_ref2: | |
6457 | info_ptr += 2; | |
6458 | break; | |
6459 | case DW_FORM_data4: | |
6460 | case DW_FORM_ref4: | |
6461 | info_ptr += 4; | |
6462 | break; | |
6463 | case DW_FORM_data8: | |
6464 | case DW_FORM_ref8: | |
55f1336d | 6465 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
6466 | info_ptr += 8; |
6467 | break; | |
6468 | case DW_FORM_string: | |
9b1c24c8 | 6469 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
6470 | info_ptr += bytes_read; |
6471 | break; | |
2dc7f7b3 | 6472 | case DW_FORM_sec_offset: |
4bb7a0a7 | 6473 | case DW_FORM_strp: |
36586728 | 6474 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
6475 | info_ptr += cu->header.offset_size; |
6476 | break; | |
2dc7f7b3 | 6477 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
6478 | case DW_FORM_block: |
6479 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6480 | info_ptr += bytes_read; | |
6481 | break; | |
6482 | case DW_FORM_block1: | |
6483 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
6484 | break; | |
6485 | case DW_FORM_block2: | |
6486 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
6487 | break; | |
6488 | case DW_FORM_block4: | |
6489 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
6490 | break; | |
6491 | case DW_FORM_sdata: | |
6492 | case DW_FORM_udata: | |
6493 | case DW_FORM_ref_udata: | |
3019eac3 DE |
6494 | case DW_FORM_GNU_addr_index: |
6495 | case DW_FORM_GNU_str_index: | |
d521ce57 | 6496 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
6497 | break; |
6498 | case DW_FORM_indirect: | |
6499 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6500 | info_ptr += bytes_read; | |
6501 | /* We need to continue parsing from here, so just go back to | |
6502 | the top. */ | |
6503 | goto skip_attribute; | |
6504 | ||
6505 | default: | |
3e43a32a MS |
6506 | error (_("Dwarf Error: Cannot handle %s " |
6507 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
6508 | dwarf_form_name (form), |
6509 | bfd_get_filename (abfd)); | |
6510 | } | |
6511 | } | |
6512 | ||
6513 | if (abbrev->has_children) | |
dee91e82 | 6514 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
6515 | else |
6516 | return info_ptr; | |
6517 | } | |
6518 | ||
93311388 | 6519 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 6520 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 6521 | |
d521ce57 | 6522 | static const gdb_byte * |
dee91e82 DE |
6523 | locate_pdi_sibling (const struct die_reader_specs *reader, |
6524 | struct partial_die_info *orig_pdi, | |
d521ce57 | 6525 | const gdb_byte *info_ptr) |
91c24f0a DC |
6526 | { |
6527 | /* Do we know the sibling already? */ | |
72bf9492 | 6528 | |
91c24f0a DC |
6529 | if (orig_pdi->sibling) |
6530 | return orig_pdi->sibling; | |
6531 | ||
6532 | /* Are there any children to deal with? */ | |
6533 | ||
6534 | if (!orig_pdi->has_children) | |
6535 | return info_ptr; | |
6536 | ||
4bb7a0a7 | 6537 | /* Skip the children the long way. */ |
91c24f0a | 6538 | |
dee91e82 | 6539 | return skip_children (reader, info_ptr); |
91c24f0a DC |
6540 | } |
6541 | ||
257e7a09 | 6542 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 6543 | not NULL. */ |
c906108c SS |
6544 | |
6545 | static void | |
257e7a09 YQ |
6546 | dwarf2_read_symtab (struct partial_symtab *self, |
6547 | struct objfile *objfile) | |
c906108c | 6548 | { |
257e7a09 | 6549 | if (self->readin) |
c906108c | 6550 | { |
442e4d9c | 6551 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 6552 | self->filename); |
442e4d9c YQ |
6553 | } |
6554 | else | |
6555 | { | |
6556 | if (info_verbose) | |
c906108c | 6557 | { |
442e4d9c | 6558 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 6559 | self->filename); |
442e4d9c | 6560 | gdb_flush (gdb_stdout); |
c906108c | 6561 | } |
c906108c | 6562 | |
442e4d9c YQ |
6563 | /* Restore our global data. */ |
6564 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10b3939b | 6565 | |
442e4d9c YQ |
6566 | /* If this psymtab is constructed from a debug-only objfile, the |
6567 | has_section_at_zero flag will not necessarily be correct. We | |
6568 | can get the correct value for this flag by looking at the data | |
6569 | associated with the (presumably stripped) associated objfile. */ | |
6570 | if (objfile->separate_debug_objfile_backlink) | |
6571 | { | |
6572 | struct dwarf2_per_objfile *dpo_backlink | |
6573 | = objfile_data (objfile->separate_debug_objfile_backlink, | |
6574 | dwarf2_objfile_data_key); | |
9a619af0 | 6575 | |
442e4d9c YQ |
6576 | dwarf2_per_objfile->has_section_at_zero |
6577 | = dpo_backlink->has_section_at_zero; | |
6578 | } | |
b2ab525c | 6579 | |
442e4d9c | 6580 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 6581 | |
257e7a09 | 6582 | psymtab_to_symtab_1 (self); |
c906108c | 6583 | |
442e4d9c YQ |
6584 | /* Finish up the debug error message. */ |
6585 | if (info_verbose) | |
6586 | printf_filtered (_("done.\n")); | |
c906108c | 6587 | } |
95554aad TT |
6588 | |
6589 | process_cu_includes (); | |
c906108c | 6590 | } |
9cdd5dbd DE |
6591 | \f |
6592 | /* Reading in full CUs. */ | |
c906108c | 6593 | |
10b3939b DJ |
6594 | /* Add PER_CU to the queue. */ |
6595 | ||
6596 | static void | |
95554aad TT |
6597 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
6598 | enum language pretend_language) | |
10b3939b DJ |
6599 | { |
6600 | struct dwarf2_queue_item *item; | |
6601 | ||
6602 | per_cu->queued = 1; | |
6603 | item = xmalloc (sizeof (*item)); | |
6604 | item->per_cu = per_cu; | |
95554aad | 6605 | item->pretend_language = pretend_language; |
10b3939b DJ |
6606 | item->next = NULL; |
6607 | ||
6608 | if (dwarf2_queue == NULL) | |
6609 | dwarf2_queue = item; | |
6610 | else | |
6611 | dwarf2_queue_tail->next = item; | |
6612 | ||
6613 | dwarf2_queue_tail = item; | |
6614 | } | |
6615 | ||
0907af0c DE |
6616 | /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation |
6617 | unit and add it to our queue. | |
6618 | The result is non-zero if PER_CU was queued, otherwise the result is zero | |
6619 | meaning either PER_CU is already queued or it is already loaded. */ | |
6620 | ||
6621 | static int | |
6622 | maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
6623 | struct dwarf2_per_cu_data *per_cu, | |
6624 | enum language pretend_language) | |
6625 | { | |
6626 | /* We may arrive here during partial symbol reading, if we need full | |
6627 | DIEs to process an unusual case (e.g. template arguments). Do | |
6628 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
6629 | if (dwarf2_per_objfile->reading_partial_symbols) | |
6630 | { | |
6631 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
6632 | return 1; | |
6633 | return 0; | |
6634 | } | |
6635 | ||
6636 | /* Mark the dependence relation so that we don't flush PER_CU | |
6637 | too early. */ | |
6638 | dwarf2_add_dependence (this_cu, per_cu); | |
6639 | ||
6640 | /* If it's already on the queue, we have nothing to do. */ | |
6641 | if (per_cu->queued) | |
6642 | return 0; | |
6643 | ||
6644 | /* If the compilation unit is already loaded, just mark it as | |
6645 | used. */ | |
6646 | if (per_cu->cu != NULL) | |
6647 | { | |
6648 | per_cu->cu->last_used = 0; | |
6649 | return 0; | |
6650 | } | |
6651 | ||
6652 | /* Add it to the queue. */ | |
6653 | queue_comp_unit (per_cu, pretend_language); | |
6654 | ||
6655 | return 1; | |
6656 | } | |
6657 | ||
10b3939b DJ |
6658 | /* Process the queue. */ |
6659 | ||
6660 | static void | |
a0f42c21 | 6661 | process_queue (void) |
10b3939b DJ |
6662 | { |
6663 | struct dwarf2_queue_item *item, *next_item; | |
6664 | ||
45cfd468 DE |
6665 | if (dwarf2_read_debug) |
6666 | { | |
6667 | fprintf_unfiltered (gdb_stdlog, | |
6668 | "Expanding one or more symtabs of objfile %s ...\n", | |
6669 | dwarf2_per_objfile->objfile->name); | |
6670 | } | |
6671 | ||
03dd20cc DJ |
6672 | /* The queue starts out with one item, but following a DIE reference |
6673 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
6674 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
6675 | { | |
9291a0cd TT |
6676 | if (dwarf2_per_objfile->using_index |
6677 | ? !item->per_cu->v.quick->symtab | |
6678 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
6679 | { |
6680 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
6681 | ||
6682 | if (dwarf2_read_debug) | |
6683 | { | |
6684 | fprintf_unfiltered (gdb_stdlog, | |
6685 | "Expanding symtab of %s at offset 0x%x\n", | |
6686 | per_cu->is_debug_types ? "TU" : "CU", | |
6687 | per_cu->offset.sect_off); | |
6688 | } | |
6689 | ||
6690 | if (per_cu->is_debug_types) | |
6691 | process_full_type_unit (per_cu, item->pretend_language); | |
6692 | else | |
6693 | process_full_comp_unit (per_cu, item->pretend_language); | |
6694 | ||
6695 | if (dwarf2_read_debug) | |
6696 | { | |
6697 | fprintf_unfiltered (gdb_stdlog, | |
6698 | "Done expanding %s at offset 0x%x\n", | |
6699 | per_cu->is_debug_types ? "TU" : "CU", | |
6700 | per_cu->offset.sect_off); | |
6701 | } | |
6702 | } | |
10b3939b DJ |
6703 | |
6704 | item->per_cu->queued = 0; | |
6705 | next_item = item->next; | |
6706 | xfree (item); | |
6707 | } | |
6708 | ||
6709 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
6710 | |
6711 | if (dwarf2_read_debug) | |
6712 | { | |
6713 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
6714 | dwarf2_per_objfile->objfile->name); | |
6715 | } | |
10b3939b DJ |
6716 | } |
6717 | ||
6718 | /* Free all allocated queue entries. This function only releases anything if | |
6719 | an error was thrown; if the queue was processed then it would have been | |
6720 | freed as we went along. */ | |
6721 | ||
6722 | static void | |
6723 | dwarf2_release_queue (void *dummy) | |
6724 | { | |
6725 | struct dwarf2_queue_item *item, *last; | |
6726 | ||
6727 | item = dwarf2_queue; | |
6728 | while (item) | |
6729 | { | |
6730 | /* Anything still marked queued is likely to be in an | |
6731 | inconsistent state, so discard it. */ | |
6732 | if (item->per_cu->queued) | |
6733 | { | |
6734 | if (item->per_cu->cu != NULL) | |
dee91e82 | 6735 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
6736 | item->per_cu->queued = 0; |
6737 | } | |
6738 | ||
6739 | last = item; | |
6740 | item = item->next; | |
6741 | xfree (last); | |
6742 | } | |
6743 | ||
6744 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
6745 | } | |
6746 | ||
6747 | /* Read in full symbols for PST, and anything it depends on. */ | |
6748 | ||
c906108c | 6749 | static void |
fba45db2 | 6750 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 6751 | { |
10b3939b | 6752 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
6753 | int i; |
6754 | ||
95554aad TT |
6755 | if (pst->readin) |
6756 | return; | |
6757 | ||
aaa75496 | 6758 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
6759 | if (!pst->dependencies[i]->readin |
6760 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
6761 | { |
6762 | /* Inform about additional files that need to be read in. */ | |
6763 | if (info_verbose) | |
6764 | { | |
a3f17187 | 6765 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
6766 | fputs_filtered (" ", gdb_stdout); |
6767 | wrap_here (""); | |
6768 | fputs_filtered ("and ", gdb_stdout); | |
6769 | wrap_here (""); | |
6770 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 6771 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
6772 | gdb_flush (gdb_stdout); |
6773 | } | |
6774 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
6775 | } | |
6776 | ||
e38df1d0 | 6777 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
6778 | |
6779 | if (per_cu == NULL) | |
aaa75496 JB |
6780 | { |
6781 | /* It's an include file, no symbols to read for it. | |
6782 | Everything is in the parent symtab. */ | |
6783 | pst->readin = 1; | |
6784 | return; | |
6785 | } | |
c906108c | 6786 | |
a0f42c21 | 6787 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
6788 | } |
6789 | ||
dee91e82 DE |
6790 | /* Trivial hash function for die_info: the hash value of a DIE |
6791 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 6792 | |
dee91e82 DE |
6793 | static hashval_t |
6794 | die_hash (const void *item) | |
10b3939b | 6795 | { |
dee91e82 | 6796 | const struct die_info *die = item; |
6502dd73 | 6797 | |
dee91e82 DE |
6798 | return die->offset.sect_off; |
6799 | } | |
63d06c5c | 6800 | |
dee91e82 DE |
6801 | /* Trivial comparison function for die_info structures: two DIEs |
6802 | are equal if they have the same offset. */ | |
98bfdba5 | 6803 | |
dee91e82 DE |
6804 | static int |
6805 | die_eq (const void *item_lhs, const void *item_rhs) | |
6806 | { | |
6807 | const struct die_info *die_lhs = item_lhs; | |
6808 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 6809 | |
dee91e82 DE |
6810 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
6811 | } | |
c906108c | 6812 | |
dee91e82 DE |
6813 | /* die_reader_func for load_full_comp_unit. |
6814 | This is identical to read_signatured_type_reader, | |
6815 | but is kept separate for now. */ | |
c906108c | 6816 | |
dee91e82 DE |
6817 | static void |
6818 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6819 | const gdb_byte *info_ptr, |
dee91e82 DE |
6820 | struct die_info *comp_unit_die, |
6821 | int has_children, | |
6822 | void *data) | |
6823 | { | |
6824 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 6825 | enum language *language_ptr = data; |
6caca83c | 6826 | |
dee91e82 DE |
6827 | gdb_assert (cu->die_hash == NULL); |
6828 | cu->die_hash = | |
6829 | htab_create_alloc_ex (cu->header.length / 12, | |
6830 | die_hash, | |
6831 | die_eq, | |
6832 | NULL, | |
6833 | &cu->comp_unit_obstack, | |
6834 | hashtab_obstack_allocate, | |
6835 | dummy_obstack_deallocate); | |
e142c38c | 6836 | |
dee91e82 DE |
6837 | if (has_children) |
6838 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
6839 | &info_ptr, comp_unit_die); | |
6840 | cu->dies = comp_unit_die; | |
6841 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
6842 | |
6843 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 6844 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 6845 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
6846 | or we won't be able to build types correctly. |
6847 | Similarly, if we do not read the producer, we can not apply | |
6848 | producer-specific interpretation. */ | |
95554aad | 6849 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 6850 | } |
10b3939b | 6851 | |
dee91e82 | 6852 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 6853 | |
dee91e82 | 6854 | static void |
95554aad TT |
6855 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
6856 | enum language pretend_language) | |
dee91e82 | 6857 | { |
3019eac3 | 6858 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 6859 | |
f4dc4d17 DE |
6860 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6861 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
6862 | } |
6863 | ||
3da10d80 KS |
6864 | /* Add a DIE to the delayed physname list. */ |
6865 | ||
6866 | static void | |
6867 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
6868 | const char *name, struct die_info *die, | |
6869 | struct dwarf2_cu *cu) | |
6870 | { | |
6871 | struct delayed_method_info mi; | |
6872 | mi.type = type; | |
6873 | mi.fnfield_index = fnfield_index; | |
6874 | mi.index = index; | |
6875 | mi.name = name; | |
6876 | mi.die = die; | |
6877 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
6878 | } | |
6879 | ||
6880 | /* A cleanup for freeing the delayed method list. */ | |
6881 | ||
6882 | static void | |
6883 | free_delayed_list (void *ptr) | |
6884 | { | |
6885 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
6886 | if (cu->method_list != NULL) | |
6887 | { | |
6888 | VEC_free (delayed_method_info, cu->method_list); | |
6889 | cu->method_list = NULL; | |
6890 | } | |
6891 | } | |
6892 | ||
6893 | /* Compute the physnames of any methods on the CU's method list. | |
6894 | ||
6895 | The computation of method physnames is delayed in order to avoid the | |
6896 | (bad) condition that one of the method's formal parameters is of an as yet | |
6897 | incomplete type. */ | |
6898 | ||
6899 | static void | |
6900 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
6901 | { | |
6902 | int i; | |
6903 | struct delayed_method_info *mi; | |
6904 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
6905 | { | |
1d06ead6 | 6906 | const char *physname; |
3da10d80 KS |
6907 | struct fn_fieldlist *fn_flp |
6908 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 6909 | physname = dwarf2_physname (mi->name, mi->die, cu); |
3da10d80 KS |
6910 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
6911 | } | |
6912 | } | |
6913 | ||
a766d390 DE |
6914 | /* Go objects should be embedded in a DW_TAG_module DIE, |
6915 | and it's not clear if/how imported objects will appear. | |
6916 | To keep Go support simple until that's worked out, | |
6917 | go back through what we've read and create something usable. | |
6918 | We could do this while processing each DIE, and feels kinda cleaner, | |
6919 | but that way is more invasive. | |
6920 | This is to, for example, allow the user to type "p var" or "b main" | |
6921 | without having to specify the package name, and allow lookups | |
6922 | of module.object to work in contexts that use the expression | |
6923 | parser. */ | |
6924 | ||
6925 | static void | |
6926 | fixup_go_packaging (struct dwarf2_cu *cu) | |
6927 | { | |
6928 | char *package_name = NULL; | |
6929 | struct pending *list; | |
6930 | int i; | |
6931 | ||
6932 | for (list = global_symbols; list != NULL; list = list->next) | |
6933 | { | |
6934 | for (i = 0; i < list->nsyms; ++i) | |
6935 | { | |
6936 | struct symbol *sym = list->symbol[i]; | |
6937 | ||
6938 | if (SYMBOL_LANGUAGE (sym) == language_go | |
6939 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
6940 | { | |
6941 | char *this_package_name = go_symbol_package_name (sym); | |
6942 | ||
6943 | if (this_package_name == NULL) | |
6944 | continue; | |
6945 | if (package_name == NULL) | |
6946 | package_name = this_package_name; | |
6947 | else | |
6948 | { | |
6949 | if (strcmp (package_name, this_package_name) != 0) | |
6950 | complaint (&symfile_complaints, | |
6951 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 | 6952 | (SYMBOL_SYMTAB (sym) |
05cba821 | 6953 | ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym)) |
a766d390 DE |
6954 | : cu->objfile->name), |
6955 | this_package_name, package_name); | |
6956 | xfree (this_package_name); | |
6957 | } | |
6958 | } | |
6959 | } | |
6960 | } | |
6961 | ||
6962 | if (package_name != NULL) | |
6963 | { | |
6964 | struct objfile *objfile = cu->objfile; | |
10f0c4bb TT |
6965 | const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack, |
6966 | package_name, | |
6967 | strlen (package_name)); | |
a766d390 | 6968 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 6969 | saved_package_name, objfile); |
a766d390 DE |
6970 | struct symbol *sym; |
6971 | ||
6972 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
6973 | ||
e623cf5d | 6974 | sym = allocate_symbol (objfile); |
f85f34ed | 6975 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
6976 | SYMBOL_SET_NAMES (sym, saved_package_name, |
6977 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
6978 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
6979 | e.g., "main" finds the "main" module and not C's main(). */ | |
6980 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 6981 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
6982 | SYMBOL_TYPE (sym) = type; |
6983 | ||
6984 | add_symbol_to_list (sym, &global_symbols); | |
6985 | ||
6986 | xfree (package_name); | |
6987 | } | |
6988 | } | |
6989 | ||
95554aad TT |
6990 | /* Return the symtab for PER_CU. This works properly regardless of |
6991 | whether we're using the index or psymtabs. */ | |
6992 | ||
6993 | static struct symtab * | |
6994 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
6995 | { | |
6996 | return (dwarf2_per_objfile->using_index | |
6997 | ? per_cu->v.quick->symtab | |
6998 | : per_cu->v.psymtab->symtab); | |
6999 | } | |
7000 | ||
7001 | /* A helper function for computing the list of all symbol tables | |
7002 | included by PER_CU. */ | |
7003 | ||
7004 | static void | |
7005 | recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result, | |
7006 | htab_t all_children, | |
7007 | struct dwarf2_per_cu_data *per_cu) | |
7008 | { | |
7009 | void **slot; | |
7010 | int ix; | |
7011 | struct dwarf2_per_cu_data *iter; | |
7012 | ||
7013 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7014 | if (*slot != NULL) | |
7015 | { | |
7016 | /* This inclusion and its children have been processed. */ | |
7017 | return; | |
7018 | } | |
7019 | ||
7020 | *slot = per_cu; | |
7021 | /* Only add a CU if it has a symbol table. */ | |
7022 | if (get_symtab (per_cu) != NULL) | |
7023 | VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu); | |
7024 | ||
7025 | for (ix = 0; | |
796a7ff8 | 7026 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad TT |
7027 | ++ix) |
7028 | recursively_compute_inclusions (result, all_children, iter); | |
7029 | } | |
7030 | ||
7031 | /* Compute the symtab 'includes' fields for the symtab related to | |
7032 | PER_CU. */ | |
7033 | ||
7034 | static void | |
7035 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
7036 | { | |
f4dc4d17 DE |
7037 | gdb_assert (! per_cu->is_debug_types); |
7038 | ||
796a7ff8 | 7039 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7040 | { |
7041 | int ix, len; | |
7042 | struct dwarf2_per_cu_data *iter; | |
7043 | VEC (dwarf2_per_cu_ptr) *result_children = NULL; | |
7044 | htab_t all_children; | |
7045 | struct symtab *symtab = get_symtab (per_cu); | |
7046 | ||
7047 | /* If we don't have a symtab, we can just skip this case. */ | |
7048 | if (symtab == NULL) | |
7049 | return; | |
7050 | ||
7051 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7052 | NULL, xcalloc, xfree); | |
7053 | ||
7054 | for (ix = 0; | |
796a7ff8 | 7055 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
95554aad TT |
7056 | ix, iter); |
7057 | ++ix) | |
7058 | recursively_compute_inclusions (&result_children, all_children, iter); | |
7059 | ||
796a7ff8 DE |
7060 | /* Now we have a transitive closure of all the included CUs, and |
7061 | for .gdb_index version 7 the included TUs, so we can convert it | |
7062 | to a list of symtabs. */ | |
95554aad TT |
7063 | len = VEC_length (dwarf2_per_cu_ptr, result_children); |
7064 | symtab->includes | |
7065 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
7066 | (len + 1) * sizeof (struct symtab *)); | |
7067 | for (ix = 0; | |
7068 | VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter); | |
7069 | ++ix) | |
7070 | symtab->includes[ix] = get_symtab (iter); | |
7071 | symtab->includes[len] = NULL; | |
7072 | ||
7073 | VEC_free (dwarf2_per_cu_ptr, result_children); | |
7074 | htab_delete (all_children); | |
7075 | } | |
7076 | } | |
7077 | ||
7078 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
7079 | read. */ | |
7080 | ||
7081 | static void | |
7082 | process_cu_includes (void) | |
7083 | { | |
7084 | int ix; | |
7085 | struct dwarf2_per_cu_data *iter; | |
7086 | ||
7087 | for (ix = 0; | |
7088 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
7089 | ix, iter); | |
7090 | ++ix) | |
f4dc4d17 DE |
7091 | { |
7092 | if (! iter->is_debug_types) | |
7093 | compute_symtab_includes (iter); | |
7094 | } | |
95554aad TT |
7095 | |
7096 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
7097 | } | |
7098 | ||
9cdd5dbd | 7099 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
7100 | already been loaded into memory. */ |
7101 | ||
7102 | static void | |
95554aad TT |
7103 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7104 | enum language pretend_language) | |
10b3939b | 7105 | { |
10b3939b | 7106 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 7107 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
7108 | CORE_ADDR lowpc, highpc; |
7109 | struct symtab *symtab; | |
3da10d80 | 7110 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 7111 | CORE_ADDR baseaddr; |
4359dff1 | 7112 | struct block *static_block; |
10b3939b DJ |
7113 | |
7114 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7115 | ||
10b3939b DJ |
7116 | buildsym_init (); |
7117 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 7118 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
7119 | |
7120 | cu->list_in_scope = &file_symbols; | |
c906108c | 7121 | |
95554aad TT |
7122 | cu->language = pretend_language; |
7123 | cu->language_defn = language_def (cu->language); | |
7124 | ||
c906108c | 7125 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 7126 | process_die (cu->dies, cu); |
c906108c | 7127 | |
a766d390 DE |
7128 | /* For now fudge the Go package. */ |
7129 | if (cu->language == language_go) | |
7130 | fixup_go_packaging (cu); | |
7131 | ||
3da10d80 KS |
7132 | /* Now that we have processed all the DIEs in the CU, all the types |
7133 | should be complete, and it should now be safe to compute all of the | |
7134 | physnames. */ | |
7135 | compute_delayed_physnames (cu); | |
7136 | do_cleanups (delayed_list_cleanup); | |
7137 | ||
fae299cd DC |
7138 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
7139 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
7140 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 7141 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 7142 | |
36586728 | 7143 | static_block |
ff546935 | 7144 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1); |
4359dff1 JK |
7145 | |
7146 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
7147 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
7148 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
7149 | addrmap to help ensure it has an accurate map of pc values belonging to | |
7150 | this comp unit. */ | |
7151 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
7152 | ||
7153 | symtab = end_symtab_from_static_block (static_block, objfile, | |
7154 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 7155 | |
8be455d7 | 7156 | if (symtab != NULL) |
c906108c | 7157 | { |
df15bd07 | 7158 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 7159 | |
8be455d7 JK |
7160 | /* Set symtab language to language from DW_AT_language. If the |
7161 | compilation is from a C file generated by language preprocessors, do | |
7162 | not set the language if it was already deduced by start_subfile. */ | |
7163 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7164 | symtab->language = cu->language; | |
7165 | ||
7166 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
7167 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
7168 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
7169 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
7170 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
7171 | |
7172 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
7173 | needed, it would be wrong due to missing DW_AT_producer there. | |
7174 | ||
7175 | Still one can confuse GDB by using non-standard GCC compilation | |
7176 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
7177 | */ | |
ab260dad | 7178 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 7179 | symtab->locations_valid = 1; |
e0d00bc7 JK |
7180 | |
7181 | if (gcc_4_minor >= 5) | |
7182 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
7183 | |
7184 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 7185 | } |
9291a0cd TT |
7186 | |
7187 | if (dwarf2_per_objfile->using_index) | |
7188 | per_cu->v.quick->symtab = symtab; | |
7189 | else | |
7190 | { | |
7191 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7192 | pst->symtab = symtab; | |
7193 | pst->readin = 1; | |
7194 | } | |
c906108c | 7195 | |
95554aad TT |
7196 | /* Push it for inclusion processing later. */ |
7197 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
7198 | ||
c906108c | 7199 | do_cleanups (back_to); |
f4dc4d17 | 7200 | } |
45cfd468 | 7201 | |
f4dc4d17 DE |
7202 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
7203 | already been loaded into memory. */ | |
7204 | ||
7205 | static void | |
7206 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
7207 | enum language pretend_language) | |
7208 | { | |
7209 | struct dwarf2_cu *cu = per_cu->cu; | |
7210 | struct objfile *objfile = per_cu->objfile; | |
7211 | struct symtab *symtab; | |
7212 | struct cleanup *back_to, *delayed_list_cleanup; | |
0186c6a7 DE |
7213 | struct signatured_type *sig_type; |
7214 | ||
7215 | gdb_assert (per_cu->is_debug_types); | |
7216 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7217 | |
7218 | buildsym_init (); | |
7219 | back_to = make_cleanup (really_free_pendings, NULL); | |
7220 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
7221 | ||
7222 | cu->list_in_scope = &file_symbols; | |
7223 | ||
7224 | cu->language = pretend_language; | |
7225 | cu->language_defn = language_def (cu->language); | |
7226 | ||
7227 | /* The symbol tables are set up in read_type_unit_scope. */ | |
7228 | process_die (cu->dies, cu); | |
7229 | ||
7230 | /* For now fudge the Go package. */ | |
7231 | if (cu->language == language_go) | |
7232 | fixup_go_packaging (cu); | |
7233 | ||
7234 | /* Now that we have processed all the DIEs in the CU, all the types | |
7235 | should be complete, and it should now be safe to compute all of the | |
7236 | physnames. */ | |
7237 | compute_delayed_physnames (cu); | |
7238 | do_cleanups (delayed_list_cleanup); | |
7239 | ||
7240 | /* TUs share symbol tables. | |
7241 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
7242 | of it with end_expandable_symtab. Otherwise, complete the addition of |
7243 | this TU's symbols to the existing symtab. */ | |
0186c6a7 | 7244 | if (sig_type->type_unit_group->primary_symtab == NULL) |
45cfd468 | 7245 | { |
f4dc4d17 | 7246 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
0186c6a7 | 7247 | sig_type->type_unit_group->primary_symtab = symtab; |
f4dc4d17 DE |
7248 | |
7249 | if (symtab != NULL) | |
7250 | { | |
7251 | /* Set symtab language to language from DW_AT_language. If the | |
7252 | compilation is from a C file generated by language preprocessors, | |
7253 | do not set the language if it was already deduced by | |
7254 | start_subfile. */ | |
7255 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7256 | symtab->language = cu->language; | |
7257 | } | |
7258 | } | |
7259 | else | |
7260 | { | |
7261 | augment_type_symtab (objfile, | |
0186c6a7 DE |
7262 | sig_type->type_unit_group->primary_symtab); |
7263 | symtab = sig_type->type_unit_group->primary_symtab; | |
f4dc4d17 DE |
7264 | } |
7265 | ||
7266 | if (dwarf2_per_objfile->using_index) | |
7267 | per_cu->v.quick->symtab = symtab; | |
7268 | else | |
7269 | { | |
7270 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7271 | pst->symtab = symtab; | |
7272 | pst->readin = 1; | |
45cfd468 | 7273 | } |
f4dc4d17 DE |
7274 | |
7275 | do_cleanups (back_to); | |
c906108c SS |
7276 | } |
7277 | ||
95554aad TT |
7278 | /* Process an imported unit DIE. */ |
7279 | ||
7280 | static void | |
7281 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
7282 | { | |
7283 | struct attribute *attr; | |
7284 | ||
f4dc4d17 DE |
7285 | /* For now we don't handle imported units in type units. */ |
7286 | if (cu->per_cu->is_debug_types) | |
7287 | { | |
7288 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7289 | " supported in type units [in module %s]"), | |
7290 | cu->objfile->name); | |
7291 | } | |
7292 | ||
95554aad TT |
7293 | attr = dwarf2_attr (die, DW_AT_import, cu); |
7294 | if (attr != NULL) | |
7295 | { | |
7296 | struct dwarf2_per_cu_data *per_cu; | |
7297 | struct symtab *imported_symtab; | |
7298 | sect_offset offset; | |
36586728 | 7299 | int is_dwz; |
95554aad TT |
7300 | |
7301 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
7302 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
7303 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad TT |
7304 | |
7305 | /* Queue the unit, if needed. */ | |
7306 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) | |
7307 | load_full_comp_unit (per_cu, cu->language); | |
7308 | ||
796a7ff8 | 7309 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
7310 | per_cu); |
7311 | } | |
7312 | } | |
7313 | ||
c906108c SS |
7314 | /* Process a die and its children. */ |
7315 | ||
7316 | static void | |
e7c27a73 | 7317 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
7318 | { |
7319 | switch (die->tag) | |
7320 | { | |
7321 | case DW_TAG_padding: | |
7322 | break; | |
7323 | case DW_TAG_compile_unit: | |
95554aad | 7324 | case DW_TAG_partial_unit: |
e7c27a73 | 7325 | read_file_scope (die, cu); |
c906108c | 7326 | break; |
348e048f DE |
7327 | case DW_TAG_type_unit: |
7328 | read_type_unit_scope (die, cu); | |
7329 | break; | |
c906108c | 7330 | case DW_TAG_subprogram: |
c906108c | 7331 | case DW_TAG_inlined_subroutine: |
edb3359d | 7332 | read_func_scope (die, cu); |
c906108c SS |
7333 | break; |
7334 | case DW_TAG_lexical_block: | |
14898363 L |
7335 | case DW_TAG_try_block: |
7336 | case DW_TAG_catch_block: | |
e7c27a73 | 7337 | read_lexical_block_scope (die, cu); |
c906108c | 7338 | break; |
96408a79 SA |
7339 | case DW_TAG_GNU_call_site: |
7340 | read_call_site_scope (die, cu); | |
7341 | break; | |
c906108c | 7342 | case DW_TAG_class_type: |
680b30c7 | 7343 | case DW_TAG_interface_type: |
c906108c SS |
7344 | case DW_TAG_structure_type: |
7345 | case DW_TAG_union_type: | |
134d01f1 | 7346 | process_structure_scope (die, cu); |
c906108c SS |
7347 | break; |
7348 | case DW_TAG_enumeration_type: | |
134d01f1 | 7349 | process_enumeration_scope (die, cu); |
c906108c | 7350 | break; |
134d01f1 | 7351 | |
f792889a DJ |
7352 | /* These dies have a type, but processing them does not create |
7353 | a symbol or recurse to process the children. Therefore we can | |
7354 | read them on-demand through read_type_die. */ | |
c906108c | 7355 | case DW_TAG_subroutine_type: |
72019c9c | 7356 | case DW_TAG_set_type: |
c906108c | 7357 | case DW_TAG_array_type: |
c906108c | 7358 | case DW_TAG_pointer_type: |
c906108c | 7359 | case DW_TAG_ptr_to_member_type: |
c906108c | 7360 | case DW_TAG_reference_type: |
c906108c | 7361 | case DW_TAG_string_type: |
c906108c | 7362 | break; |
134d01f1 | 7363 | |
c906108c | 7364 | case DW_TAG_base_type: |
a02abb62 | 7365 | case DW_TAG_subrange_type: |
cb249c71 | 7366 | case DW_TAG_typedef: |
134d01f1 DJ |
7367 | /* Add a typedef symbol for the type definition, if it has a |
7368 | DW_AT_name. */ | |
f792889a | 7369 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 7370 | break; |
c906108c | 7371 | case DW_TAG_common_block: |
e7c27a73 | 7372 | read_common_block (die, cu); |
c906108c SS |
7373 | break; |
7374 | case DW_TAG_common_inclusion: | |
7375 | break; | |
d9fa45fe | 7376 | case DW_TAG_namespace: |
4d4ec4e5 | 7377 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 7378 | read_namespace (die, cu); |
d9fa45fe | 7379 | break; |
5d7cb8df | 7380 | case DW_TAG_module: |
4d4ec4e5 | 7381 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
7382 | read_module (die, cu); |
7383 | break; | |
d9fa45fe DC |
7384 | case DW_TAG_imported_declaration: |
7385 | case DW_TAG_imported_module: | |
4d4ec4e5 | 7386 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
7387 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
7388 | || cu->language != language_fortran)) | |
7389 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
7390 | dwarf_tag_name (die->tag)); | |
7391 | read_import_statement (die, cu); | |
d9fa45fe | 7392 | break; |
95554aad TT |
7393 | |
7394 | case DW_TAG_imported_unit: | |
7395 | process_imported_unit_die (die, cu); | |
7396 | break; | |
7397 | ||
c906108c | 7398 | default: |
e7c27a73 | 7399 | new_symbol (die, NULL, cu); |
c906108c SS |
7400 | break; |
7401 | } | |
7402 | } | |
ca69b9e6 DE |
7403 | \f |
7404 | /* DWARF name computation. */ | |
c906108c | 7405 | |
94af9270 KS |
7406 | /* A helper function for dwarf2_compute_name which determines whether DIE |
7407 | needs to have the name of the scope prepended to the name listed in the | |
7408 | die. */ | |
7409 | ||
7410 | static int | |
7411 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
7412 | { | |
1c809c68 TT |
7413 | struct attribute *attr; |
7414 | ||
94af9270 KS |
7415 | switch (die->tag) |
7416 | { | |
7417 | case DW_TAG_namespace: | |
7418 | case DW_TAG_typedef: | |
7419 | case DW_TAG_class_type: | |
7420 | case DW_TAG_interface_type: | |
7421 | case DW_TAG_structure_type: | |
7422 | case DW_TAG_union_type: | |
7423 | case DW_TAG_enumeration_type: | |
7424 | case DW_TAG_enumerator: | |
7425 | case DW_TAG_subprogram: | |
7426 | case DW_TAG_member: | |
7427 | return 1; | |
7428 | ||
7429 | case DW_TAG_variable: | |
c2b0a229 | 7430 | case DW_TAG_constant: |
94af9270 KS |
7431 | /* We only need to prefix "globally" visible variables. These include |
7432 | any variable marked with DW_AT_external or any variable that | |
7433 | lives in a namespace. [Variables in anonymous namespaces | |
7434 | require prefixing, but they are not DW_AT_external.] */ | |
7435 | ||
7436 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
7437 | { | |
7438 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 7439 | |
94af9270 KS |
7440 | return die_needs_namespace (die_specification (die, &spec_cu), |
7441 | spec_cu); | |
7442 | } | |
7443 | ||
1c809c68 | 7444 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
7445 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
7446 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
7447 | return 0; |
7448 | /* A variable in a lexical block of some kind does not need a | |
7449 | namespace, even though in C++ such variables may be external | |
7450 | and have a mangled name. */ | |
7451 | if (die->parent->tag == DW_TAG_lexical_block | |
7452 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
7453 | || die->parent->tag == DW_TAG_catch_block |
7454 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
7455 | return 0; |
7456 | return 1; | |
94af9270 KS |
7457 | |
7458 | default: | |
7459 | return 0; | |
7460 | } | |
7461 | } | |
7462 | ||
98bfdba5 PA |
7463 | /* Retrieve the last character from a mem_file. */ |
7464 | ||
7465 | static void | |
7466 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
7467 | { | |
7468 | char *last_char_p = (char *) object; | |
7469 | ||
7470 | if (length > 0) | |
7471 | *last_char_p = buffer[length - 1]; | |
7472 | } | |
7473 | ||
94af9270 | 7474 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
7475 | compute the physname for the object, which include a method's: |
7476 | - formal parameters (C++/Java), | |
7477 | - receiver type (Go), | |
7478 | - return type (Java). | |
7479 | ||
7480 | The term "physname" is a bit confusing. | |
7481 | For C++, for example, it is the demangled name. | |
7482 | For Go, for example, it's the mangled name. | |
94af9270 | 7483 | |
af6b7be1 JB |
7484 | For Ada, return the DIE's linkage name rather than the fully qualified |
7485 | name. PHYSNAME is ignored.. | |
7486 | ||
94af9270 KS |
7487 | The result is allocated on the objfile_obstack and canonicalized. */ |
7488 | ||
7489 | static const char * | |
15d034d0 TT |
7490 | dwarf2_compute_name (const char *name, |
7491 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
7492 | int physname) |
7493 | { | |
bb5ed363 DE |
7494 | struct objfile *objfile = cu->objfile; |
7495 | ||
94af9270 KS |
7496 | if (name == NULL) |
7497 | name = dwarf2_name (die, cu); | |
7498 | ||
f55ee35c JK |
7499 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
7500 | compute it by typename_concat inside GDB. */ | |
7501 | if (cu->language == language_ada | |
7502 | || (cu->language == language_fortran && physname)) | |
7503 | { | |
7504 | /* For Ada unit, we prefer the linkage name over the name, as | |
7505 | the former contains the exported name, which the user expects | |
7506 | to be able to reference. Ideally, we want the user to be able | |
7507 | to reference this entity using either natural or linkage name, | |
7508 | but we haven't started looking at this enhancement yet. */ | |
7509 | struct attribute *attr; | |
7510 | ||
7511 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7512 | if (attr == NULL) | |
7513 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7514 | if (attr && DW_STRING (attr)) | |
7515 | return DW_STRING (attr); | |
7516 | } | |
7517 | ||
94af9270 KS |
7518 | /* These are the only languages we know how to qualify names in. */ |
7519 | if (name != NULL | |
f55ee35c JK |
7520 | && (cu->language == language_cplus || cu->language == language_java |
7521 | || cu->language == language_fortran)) | |
94af9270 KS |
7522 | { |
7523 | if (die_needs_namespace (die, cu)) | |
7524 | { | |
7525 | long length; | |
0d5cff50 | 7526 | const char *prefix; |
94af9270 KS |
7527 | struct ui_file *buf; |
7528 | ||
7529 | prefix = determine_prefix (die, cu); | |
7530 | buf = mem_fileopen (); | |
7531 | if (*prefix != '\0') | |
7532 | { | |
f55ee35c JK |
7533 | char *prefixed_name = typename_concat (NULL, prefix, name, |
7534 | physname, cu); | |
9a619af0 | 7535 | |
94af9270 KS |
7536 | fputs_unfiltered (prefixed_name, buf); |
7537 | xfree (prefixed_name); | |
7538 | } | |
7539 | else | |
62d5b8da | 7540 | fputs_unfiltered (name, buf); |
94af9270 | 7541 | |
98bfdba5 PA |
7542 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
7543 | as children with DW_TAG_template_type_param or | |
7544 | DW_TAG_value_type_param. If the latter, add them to the name | |
7545 | here. If the name already has template parameters, then | |
7546 | skip this step; some versions of GCC emit both, and | |
7547 | it is more efficient to use the pre-computed name. | |
7548 | ||
7549 | Something to keep in mind about this process: it is very | |
7550 | unlikely, or in some cases downright impossible, to produce | |
7551 | something that will match the mangled name of a function. | |
7552 | If the definition of the function has the same debug info, | |
7553 | we should be able to match up with it anyway. But fallbacks | |
7554 | using the minimal symbol, for instance to find a method | |
7555 | implemented in a stripped copy of libstdc++, will not work. | |
7556 | If we do not have debug info for the definition, we will have to | |
7557 | match them up some other way. | |
7558 | ||
7559 | When we do name matching there is a related problem with function | |
7560 | templates; two instantiated function templates are allowed to | |
7561 | differ only by their return types, which we do not add here. */ | |
7562 | ||
7563 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
7564 | { | |
7565 | struct attribute *attr; | |
7566 | struct die_info *child; | |
7567 | int first = 1; | |
7568 | ||
7569 | die->building_fullname = 1; | |
7570 | ||
7571 | for (child = die->child; child != NULL; child = child->sibling) | |
7572 | { | |
7573 | struct type *type; | |
12df843f | 7574 | LONGEST value; |
d521ce57 | 7575 | const gdb_byte *bytes; |
98bfdba5 PA |
7576 | struct dwarf2_locexpr_baton *baton; |
7577 | struct value *v; | |
7578 | ||
7579 | if (child->tag != DW_TAG_template_type_param | |
7580 | && child->tag != DW_TAG_template_value_param) | |
7581 | continue; | |
7582 | ||
7583 | if (first) | |
7584 | { | |
7585 | fputs_unfiltered ("<", buf); | |
7586 | first = 0; | |
7587 | } | |
7588 | else | |
7589 | fputs_unfiltered (", ", buf); | |
7590 | ||
7591 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
7592 | if (attr == NULL) | |
7593 | { | |
7594 | complaint (&symfile_complaints, | |
7595 | _("template parameter missing DW_AT_type")); | |
7596 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
7597 | continue; | |
7598 | } | |
7599 | type = die_type (child, cu); | |
7600 | ||
7601 | if (child->tag == DW_TAG_template_type_param) | |
7602 | { | |
79d43c61 | 7603 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
7604 | continue; |
7605 | } | |
7606 | ||
7607 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
7608 | if (attr == NULL) | |
7609 | { | |
7610 | complaint (&symfile_complaints, | |
3e43a32a MS |
7611 | _("template parameter missing " |
7612 | "DW_AT_const_value")); | |
98bfdba5 PA |
7613 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
7614 | continue; | |
7615 | } | |
7616 | ||
7617 | dwarf2_const_value_attr (attr, type, name, | |
7618 | &cu->comp_unit_obstack, cu, | |
7619 | &value, &bytes, &baton); | |
7620 | ||
7621 | if (TYPE_NOSIGN (type)) | |
7622 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
7623 | changed, this can use value_print instead. */ | |
7624 | c_printchar (value, type, buf); | |
7625 | else | |
7626 | { | |
7627 | struct value_print_options opts; | |
7628 | ||
7629 | if (baton != NULL) | |
7630 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
7631 | baton->data, | |
7632 | baton->size, | |
7633 | baton->per_cu); | |
7634 | else if (bytes != NULL) | |
7635 | { | |
7636 | v = allocate_value (type); | |
7637 | memcpy (value_contents_writeable (v), bytes, | |
7638 | TYPE_LENGTH (type)); | |
7639 | } | |
7640 | else | |
7641 | v = value_from_longest (type, value); | |
7642 | ||
3e43a32a MS |
7643 | /* Specify decimal so that we do not depend on |
7644 | the radix. */ | |
98bfdba5 PA |
7645 | get_formatted_print_options (&opts, 'd'); |
7646 | opts.raw = 1; | |
7647 | value_print (v, buf, &opts); | |
7648 | release_value (v); | |
7649 | value_free (v); | |
7650 | } | |
7651 | } | |
7652 | ||
7653 | die->building_fullname = 0; | |
7654 | ||
7655 | if (!first) | |
7656 | { | |
7657 | /* Close the argument list, with a space if necessary | |
7658 | (nested templates). */ | |
7659 | char last_char = '\0'; | |
7660 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
7661 | if (last_char == '>') | |
7662 | fputs_unfiltered (" >", buf); | |
7663 | else | |
7664 | fputs_unfiltered (">", buf); | |
7665 | } | |
7666 | } | |
7667 | ||
94af9270 KS |
7668 | /* For Java and C++ methods, append formal parameter type |
7669 | information, if PHYSNAME. */ | |
6e70227d | 7670 | |
94af9270 KS |
7671 | if (physname && die->tag == DW_TAG_subprogram |
7672 | && (cu->language == language_cplus | |
7673 | || cu->language == language_java)) | |
7674 | { | |
7675 | struct type *type = read_type_die (die, cu); | |
7676 | ||
79d43c61 TT |
7677 | c_type_print_args (type, buf, 1, cu->language, |
7678 | &type_print_raw_options); | |
94af9270 KS |
7679 | |
7680 | if (cu->language == language_java) | |
7681 | { | |
7682 | /* For java, we must append the return type to method | |
0963b4bd | 7683 | names. */ |
94af9270 KS |
7684 | if (die->tag == DW_TAG_subprogram) |
7685 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 7686 | 0, 0, &type_print_raw_options); |
94af9270 KS |
7687 | } |
7688 | else if (cu->language == language_cplus) | |
7689 | { | |
60430eff DJ |
7690 | /* Assume that an artificial first parameter is |
7691 | "this", but do not crash if it is not. RealView | |
7692 | marks unnamed (and thus unused) parameters as | |
7693 | artificial; there is no way to differentiate | |
7694 | the two cases. */ | |
94af9270 KS |
7695 | if (TYPE_NFIELDS (type) > 0 |
7696 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 7697 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
7698 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
7699 | 0)))) | |
94af9270 KS |
7700 | fputs_unfiltered (" const", buf); |
7701 | } | |
7702 | } | |
7703 | ||
bb5ed363 | 7704 | name = ui_file_obsavestring (buf, &objfile->objfile_obstack, |
94af9270 KS |
7705 | &length); |
7706 | ui_file_delete (buf); | |
7707 | ||
7708 | if (cu->language == language_cplus) | |
7709 | { | |
15d034d0 | 7710 | const char *cname |
94af9270 | 7711 | = dwarf2_canonicalize_name (name, cu, |
bb5ed363 | 7712 | &objfile->objfile_obstack); |
9a619af0 | 7713 | |
94af9270 KS |
7714 | if (cname != NULL) |
7715 | name = cname; | |
7716 | } | |
7717 | } | |
7718 | } | |
7719 | ||
7720 | return name; | |
7721 | } | |
7722 | ||
0114d602 DJ |
7723 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
7724 | If scope qualifiers are appropriate they will be added. The result | |
7725 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
94af9270 KS |
7726 | not have a name. NAME may either be from a previous call to |
7727 | dwarf2_name or NULL. | |
7728 | ||
0963b4bd | 7729 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
7730 | |
7731 | static const char * | |
15d034d0 | 7732 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 7733 | { |
94af9270 KS |
7734 | return dwarf2_compute_name (name, die, cu, 0); |
7735 | } | |
0114d602 | 7736 | |
94af9270 KS |
7737 | /* Construct a physname for the given DIE in CU. NAME may either be |
7738 | from a previous call to dwarf2_name or NULL. The result will be | |
7739 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
7740 | name. | |
0114d602 | 7741 | |
94af9270 | 7742 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 7743 | |
94af9270 | 7744 | static const char * |
15d034d0 | 7745 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 7746 | { |
bb5ed363 | 7747 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
7748 | struct attribute *attr; |
7749 | const char *retval, *mangled = NULL, *canon = NULL; | |
7750 | struct cleanup *back_to; | |
7751 | int need_copy = 1; | |
7752 | ||
7753 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
7754 | on its own. */ | |
7755 | if (!die_needs_namespace (die, cu)) | |
7756 | return dwarf2_compute_name (name, die, cu, 1); | |
7757 | ||
7758 | back_to = make_cleanup (null_cleanup, NULL); | |
7759 | ||
7760 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7761 | if (!attr) | |
7762 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7763 | ||
7764 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
7765 | has computed. */ | |
7766 | if (attr && DW_STRING (attr)) | |
7767 | { | |
7768 | char *demangled; | |
7769 | ||
7770 | mangled = DW_STRING (attr); | |
7771 | ||
7772 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
7773 | type. It is easier for GDB users to search for such functions as | |
7774 | `name(params)' than `long name(params)'. In such case the minimal | |
7775 | symbol names do not match the full symbol names but for template | |
7776 | functions there is never a need to look up their definition from their | |
7777 | declaration so the only disadvantage remains the minimal symbol | |
7778 | variant `long name(params)' does not have the proper inferior type. | |
7779 | */ | |
7780 | ||
a766d390 DE |
7781 | if (cu->language == language_go) |
7782 | { | |
7783 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
7784 | new_symbol_full assumes we return the mangled name. | |
7785 | This just undoes that lie until things are cleaned up. */ | |
7786 | demangled = NULL; | |
7787 | } | |
7788 | else | |
7789 | { | |
8de20a37 TT |
7790 | demangled = gdb_demangle (mangled, |
7791 | (DMGL_PARAMS | DMGL_ANSI | |
7792 | | (cu->language == language_java | |
7793 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
7794 | : DMGL_RET_DROP))); | |
a766d390 | 7795 | } |
900e11f9 JK |
7796 | if (demangled) |
7797 | { | |
7798 | make_cleanup (xfree, demangled); | |
7799 | canon = demangled; | |
7800 | } | |
7801 | else | |
7802 | { | |
7803 | canon = mangled; | |
7804 | need_copy = 0; | |
7805 | } | |
7806 | } | |
7807 | ||
7808 | if (canon == NULL || check_physname) | |
7809 | { | |
7810 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
7811 | ||
7812 | if (canon != NULL && strcmp (physname, canon) != 0) | |
7813 | { | |
7814 | /* It may not mean a bug in GDB. The compiler could also | |
7815 | compute DW_AT_linkage_name incorrectly. But in such case | |
7816 | GDB would need to be bug-to-bug compatible. */ | |
7817 | ||
7818 | complaint (&symfile_complaints, | |
7819 | _("Computed physname <%s> does not match demangled <%s> " | |
7820 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7821 | physname, canon, mangled, die->offset.sect_off, objfile->name); |
900e11f9 JK |
7822 | |
7823 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
7824 | is available here - over computed PHYSNAME. It is safer | |
7825 | against both buggy GDB and buggy compilers. */ | |
7826 | ||
7827 | retval = canon; | |
7828 | } | |
7829 | else | |
7830 | { | |
7831 | retval = physname; | |
7832 | need_copy = 0; | |
7833 | } | |
7834 | } | |
7835 | else | |
7836 | retval = canon; | |
7837 | ||
7838 | if (need_copy) | |
10f0c4bb | 7839 | retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval)); |
900e11f9 JK |
7840 | |
7841 | do_cleanups (back_to); | |
7842 | return retval; | |
0114d602 DJ |
7843 | } |
7844 | ||
27aa8d6a SW |
7845 | /* Read the import statement specified by the given die and record it. */ |
7846 | ||
7847 | static void | |
7848 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
7849 | { | |
bb5ed363 | 7850 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 7851 | struct attribute *import_attr; |
32019081 | 7852 | struct die_info *imported_die, *child_die; |
de4affc9 | 7853 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 7854 | const char *imported_name; |
794684b6 | 7855 | const char *imported_name_prefix; |
13387711 SW |
7856 | const char *canonical_name; |
7857 | const char *import_alias; | |
7858 | const char *imported_declaration = NULL; | |
794684b6 | 7859 | const char *import_prefix; |
32019081 JK |
7860 | VEC (const_char_ptr) *excludes = NULL; |
7861 | struct cleanup *cleanups; | |
13387711 | 7862 | |
27aa8d6a SW |
7863 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
7864 | if (import_attr == NULL) | |
7865 | { | |
7866 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7867 | dwarf_tag_name (die->tag)); | |
7868 | return; | |
7869 | } | |
7870 | ||
de4affc9 CC |
7871 | imported_cu = cu; |
7872 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
7873 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
7874 | if (imported_name == NULL) |
7875 | { | |
7876 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
7877 | ||
7878 | The import in the following code: | |
7879 | namespace A | |
7880 | { | |
7881 | typedef int B; | |
7882 | } | |
7883 | ||
7884 | int main () | |
7885 | { | |
7886 | using A::B; | |
7887 | B b; | |
7888 | return b; | |
7889 | } | |
7890 | ||
7891 | ... | |
7892 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
7893 | <52> DW_AT_decl_file : 1 | |
7894 | <53> DW_AT_decl_line : 6 | |
7895 | <54> DW_AT_import : <0x75> | |
7896 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
7897 | <59> DW_AT_name : B | |
7898 | <5b> DW_AT_decl_file : 1 | |
7899 | <5c> DW_AT_decl_line : 2 | |
7900 | <5d> DW_AT_type : <0x6e> | |
7901 | ... | |
7902 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
7903 | <76> DW_AT_byte_size : 4 | |
7904 | <77> DW_AT_encoding : 5 (signed) | |
7905 | ||
7906 | imports the wrong die ( 0x75 instead of 0x58 ). | |
7907 | This case will be ignored until the gcc bug is fixed. */ | |
7908 | return; | |
7909 | } | |
7910 | ||
82856980 SW |
7911 | /* Figure out the local name after import. */ |
7912 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 7913 | |
794684b6 SW |
7914 | /* Figure out where the statement is being imported to. */ |
7915 | import_prefix = determine_prefix (die, cu); | |
7916 | ||
7917 | /* Figure out what the scope of the imported die is and prepend it | |
7918 | to the name of the imported die. */ | |
de4affc9 | 7919 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 7920 | |
f55ee35c JK |
7921 | if (imported_die->tag != DW_TAG_namespace |
7922 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 7923 | { |
13387711 SW |
7924 | imported_declaration = imported_name; |
7925 | canonical_name = imported_name_prefix; | |
794684b6 | 7926 | } |
13387711 | 7927 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 TT |
7928 | canonical_name = obconcat (&objfile->objfile_obstack, |
7929 | imported_name_prefix, "::", imported_name, | |
7930 | (char *) NULL); | |
13387711 SW |
7931 | else |
7932 | canonical_name = imported_name; | |
794684b6 | 7933 | |
32019081 JK |
7934 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
7935 | ||
7936 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
7937 | for (child_die = die->child; child_die && child_die->tag; | |
7938 | child_die = sibling_die (child_die)) | |
7939 | { | |
7940 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
7941 | represented by an imported module entry with an import attribute | |
7942 | referring to the module and owned entries corresponding to those | |
7943 | entities that are renamed as part of being imported. */ | |
7944 | ||
7945 | if (child_die->tag != DW_TAG_imported_declaration) | |
7946 | { | |
7947 | complaint (&symfile_complaints, | |
7948 | _("child DW_TAG_imported_declaration expected " | |
7949 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7950 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7951 | continue; |
7952 | } | |
7953 | ||
7954 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
7955 | if (import_attr == NULL) | |
7956 | { | |
7957 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7958 | dwarf_tag_name (child_die->tag)); | |
7959 | continue; | |
7960 | } | |
7961 | ||
7962 | imported_cu = cu; | |
7963 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
7964 | &imported_cu); | |
7965 | imported_name = dwarf2_name (imported_die, imported_cu); | |
7966 | if (imported_name == NULL) | |
7967 | { | |
7968 | complaint (&symfile_complaints, | |
7969 | _("child DW_TAG_imported_declaration has unknown " | |
7970 | "imported name - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7971 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7972 | continue; |
7973 | } | |
7974 | ||
7975 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
7976 | ||
7977 | process_die (child_die, cu); | |
7978 | } | |
7979 | ||
c0cc3a76 SW |
7980 | cp_add_using_directive (import_prefix, |
7981 | canonical_name, | |
7982 | import_alias, | |
13387711 | 7983 | imported_declaration, |
32019081 | 7984 | excludes, |
12aaed36 | 7985 | 0, |
bb5ed363 | 7986 | &objfile->objfile_obstack); |
32019081 JK |
7987 | |
7988 | do_cleanups (cleanups); | |
27aa8d6a SW |
7989 | } |
7990 | ||
f4dc4d17 | 7991 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 7992 | |
cb1df416 DJ |
7993 | static void |
7994 | free_cu_line_header (void *arg) | |
7995 | { | |
7996 | struct dwarf2_cu *cu = arg; | |
7997 | ||
7998 | free_line_header (cu->line_header); | |
7999 | cu->line_header = NULL; | |
8000 | } | |
8001 | ||
1b80a9fa JK |
8002 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
8003 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
8004 | this, it was first present in GCC release 4.3.0. */ | |
8005 | ||
8006 | static int | |
8007 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
8008 | { | |
8009 | if (!cu->checked_producer) | |
8010 | check_producer (cu); | |
8011 | ||
8012 | return cu->producer_is_gcc_lt_4_3; | |
8013 | } | |
8014 | ||
9291a0cd TT |
8015 | static void |
8016 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 8017 | const char **name, const char **comp_dir) |
9291a0cd TT |
8018 | { |
8019 | struct attribute *attr; | |
8020 | ||
8021 | *name = NULL; | |
8022 | *comp_dir = NULL; | |
8023 | ||
8024 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
8025 | is not a source language identifier. */ | |
8026 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8027 | if (attr) | |
8028 | { | |
8029 | *name = DW_STRING (attr); | |
8030 | } | |
8031 | ||
8032 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
8033 | if (attr) | |
8034 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
8035 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
8036 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 8037 | { |
15d034d0 TT |
8038 | char *d = ldirname (*name); |
8039 | ||
8040 | *comp_dir = d; | |
8041 | if (d != NULL) | |
8042 | make_cleanup (xfree, d); | |
9291a0cd TT |
8043 | } |
8044 | if (*comp_dir != NULL) | |
8045 | { | |
8046 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
8047 | directory, get rid of it. */ | |
8048 | char *cp = strchr (*comp_dir, ':'); | |
8049 | ||
8050 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
8051 | *comp_dir = cp + 1; | |
8052 | } | |
8053 | ||
8054 | if (*name == NULL) | |
8055 | *name = "<unknown>"; | |
8056 | } | |
8057 | ||
f4dc4d17 DE |
8058 | /* Handle DW_AT_stmt_list for a compilation unit. |
8059 | DIE is the DW_TAG_compile_unit die for CU. | |
f3f5162e DE |
8060 | COMP_DIR is the compilation directory. |
8061 | WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */ | |
2ab95328 TT |
8062 | |
8063 | static void | |
8064 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
b385a60d | 8065 | const char *comp_dir) /* ARI: editCase function */ |
2ab95328 TT |
8066 | { |
8067 | struct attribute *attr; | |
2ab95328 | 8068 | |
f4dc4d17 DE |
8069 | gdb_assert (! cu->per_cu->is_debug_types); |
8070 | ||
2ab95328 TT |
8071 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
8072 | if (attr) | |
8073 | { | |
8074 | unsigned int line_offset = DW_UNSND (attr); | |
8075 | struct line_header *line_header | |
3019eac3 | 8076 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
8077 | |
8078 | if (line_header) | |
dee91e82 DE |
8079 | { |
8080 | cu->line_header = line_header; | |
8081 | make_cleanup (free_cu_line_header, cu); | |
f4dc4d17 | 8082 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1); |
dee91e82 | 8083 | } |
2ab95328 TT |
8084 | } |
8085 | } | |
8086 | ||
95554aad | 8087 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 8088 | |
c906108c | 8089 | static void |
e7c27a73 | 8090 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8091 | { |
dee91e82 | 8092 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 8093 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 8094 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
8095 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
8096 | struct attribute *attr; | |
15d034d0 TT |
8097 | const char *name = NULL; |
8098 | const char *comp_dir = NULL; | |
c906108c SS |
8099 | struct die_info *child_die; |
8100 | bfd *abfd = objfile->obfd; | |
e142c38c | 8101 | CORE_ADDR baseaddr; |
6e70227d | 8102 | |
e142c38c | 8103 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 8104 | |
fae299cd | 8105 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
8106 | |
8107 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
8108 | from finish_block. */ | |
2acceee2 | 8109 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
8110 | lowpc = highpc; |
8111 | lowpc += baseaddr; | |
8112 | highpc += baseaddr; | |
8113 | ||
9291a0cd | 8114 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 8115 | |
95554aad | 8116 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 8117 | |
f4b8a18d KW |
8118 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
8119 | standardised yet. As a workaround for the language detection we fall | |
8120 | back to the DW_AT_producer string. */ | |
8121 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
8122 | cu->language = language_opencl; | |
8123 | ||
3019eac3 DE |
8124 | /* Similar hack for Go. */ |
8125 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
8126 | set_cu_language (DW_LANG_Go, cu); | |
8127 | ||
f4dc4d17 | 8128 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
8129 | |
8130 | /* Decode line number information if present. We do this before | |
8131 | processing child DIEs, so that the line header table is available | |
8132 | for DW_AT_decl_file. */ | |
f4dc4d17 | 8133 | handle_DW_AT_stmt_list (die, cu, comp_dir); |
3019eac3 DE |
8134 | |
8135 | /* Process all dies in compilation unit. */ | |
8136 | if (die->child != NULL) | |
8137 | { | |
8138 | child_die = die->child; | |
8139 | while (child_die && child_die->tag) | |
8140 | { | |
8141 | process_die (child_die, cu); | |
8142 | child_die = sibling_die (child_die); | |
8143 | } | |
8144 | } | |
8145 | ||
8146 | /* Decode macro information, if present. Dwarf 2 macro information | |
8147 | refers to information in the line number info statement program | |
8148 | header, so we can only read it if we've read the header | |
8149 | successfully. */ | |
8150 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
8151 | if (attr && cu->line_header) | |
8152 | { | |
8153 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
8154 | complaint (&symfile_complaints, | |
8155 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
8156 | ||
09262596 | 8157 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
8158 | } |
8159 | else | |
8160 | { | |
8161 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
8162 | if (attr && cu->line_header) | |
8163 | { | |
8164 | unsigned int macro_offset = DW_UNSND (attr); | |
8165 | ||
09262596 | 8166 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
8167 | } |
8168 | } | |
8169 | ||
8170 | do_cleanups (back_to); | |
8171 | } | |
8172 | ||
f4dc4d17 DE |
8173 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
8174 | Create the set of symtabs used by this TU, or if this TU is sharing | |
8175 | symtabs with another TU and the symtabs have already been created | |
8176 | then restore those symtabs in the line header. | |
8177 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
8178 | |
8179 | static void | |
f4dc4d17 | 8180 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 8181 | { |
f4dc4d17 DE |
8182 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8183 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
8184 | struct type_unit_group *tu_group; | |
8185 | int first_time; | |
8186 | struct line_header *lh; | |
3019eac3 | 8187 | struct attribute *attr; |
f4dc4d17 | 8188 | unsigned int i, line_offset; |
0186c6a7 | 8189 | struct signatured_type *sig_type; |
3019eac3 | 8190 | |
f4dc4d17 | 8191 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 8192 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 8193 | |
f4dc4d17 | 8194 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 8195 | |
f4dc4d17 | 8196 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 8197 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
8198 | if (sig_type->type_unit_group == NULL) |
8199 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
8200 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
8201 | |
8202 | /* If we've already processed this stmt_list there's no real need to | |
8203 | do it again, we could fake it and just recreate the part we need | |
8204 | (file name,index -> symtab mapping). If data shows this optimization | |
8205 | is useful we can do it then. */ | |
8206 | first_time = tu_group->primary_symtab == NULL; | |
8207 | ||
8208 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
8209 | debug info. */ | |
8210 | lh = NULL; | |
8211 | if (attr != NULL) | |
3019eac3 | 8212 | { |
f4dc4d17 DE |
8213 | line_offset = DW_UNSND (attr); |
8214 | lh = dwarf_decode_line_header (line_offset, cu); | |
8215 | } | |
8216 | if (lh == NULL) | |
8217 | { | |
8218 | if (first_time) | |
8219 | dwarf2_start_symtab (cu, "", NULL, 0); | |
8220 | else | |
8221 | { | |
8222 | gdb_assert (tu_group->symtabs == NULL); | |
8223 | restart_symtab (0); | |
8224 | } | |
8225 | /* Note: The primary symtab will get allocated at the end. */ | |
8226 | return; | |
3019eac3 DE |
8227 | } |
8228 | ||
f4dc4d17 DE |
8229 | cu->line_header = lh; |
8230 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 8231 | |
f4dc4d17 DE |
8232 | if (first_time) |
8233 | { | |
8234 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 8235 | |
f4dc4d17 DE |
8236 | tu_group->num_symtabs = lh->num_file_names; |
8237 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 8238 | |
f4dc4d17 DE |
8239 | for (i = 0; i < lh->num_file_names; ++i) |
8240 | { | |
d521ce57 | 8241 | const char *dir = NULL; |
f4dc4d17 | 8242 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 8243 | |
f4dc4d17 DE |
8244 | if (fe->dir_index) |
8245 | dir = lh->include_dirs[fe->dir_index - 1]; | |
8246 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 8247 | |
f4dc4d17 DE |
8248 | /* Note: We don't have to watch for the main subfile here, type units |
8249 | don't have DW_AT_name. */ | |
3019eac3 | 8250 | |
f4dc4d17 DE |
8251 | if (current_subfile->symtab == NULL) |
8252 | { | |
8253 | /* NOTE: start_subfile will recognize when it's been passed | |
8254 | a file it has already seen. So we can't assume there's a | |
8255 | simple mapping from lh->file_names to subfiles, | |
8256 | lh->file_names may contain dups. */ | |
8257 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
8258 | objfile); | |
8259 | } | |
8260 | ||
8261 | fe->symtab = current_subfile->symtab; | |
8262 | tu_group->symtabs[i] = fe->symtab; | |
8263 | } | |
8264 | } | |
8265 | else | |
3019eac3 | 8266 | { |
f4dc4d17 DE |
8267 | restart_symtab (0); |
8268 | ||
8269 | for (i = 0; i < lh->num_file_names; ++i) | |
8270 | { | |
8271 | struct file_entry *fe = &lh->file_names[i]; | |
8272 | ||
8273 | fe->symtab = tu_group->symtabs[i]; | |
8274 | } | |
3019eac3 DE |
8275 | } |
8276 | ||
f4dc4d17 DE |
8277 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
8278 | so they don't have a "real" (so to speak) symtab anyway. | |
8279 | There is later code that will assign the main symtab to all symbols | |
8280 | that don't have one. We need to handle the case of a symbol with a | |
8281 | missing symtab (DW_AT_decl_file) anyway. */ | |
8282 | } | |
3019eac3 | 8283 | |
f4dc4d17 DE |
8284 | /* Process DW_TAG_type_unit. |
8285 | For TUs we want to skip the first top level sibling if it's not the | |
8286 | actual type being defined by this TU. In this case the first top | |
8287 | level sibling is there to provide context only. */ | |
3019eac3 | 8288 | |
f4dc4d17 DE |
8289 | static void |
8290 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
8291 | { | |
8292 | struct die_info *child_die; | |
3019eac3 | 8293 | |
f4dc4d17 DE |
8294 | prepare_one_comp_unit (cu, die, language_minimal); |
8295 | ||
8296 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
8297 | We do this before processing child DIEs, so that the line header table | |
8298 | is available for DW_AT_decl_file. */ | |
8299 | setup_type_unit_groups (die, cu); | |
8300 | ||
8301 | if (die->child != NULL) | |
8302 | { | |
8303 | child_die = die->child; | |
8304 | while (child_die && child_die->tag) | |
8305 | { | |
8306 | process_die (child_die, cu); | |
8307 | child_die = sibling_die (child_die); | |
8308 | } | |
8309 | } | |
3019eac3 DE |
8310 | } |
8311 | \f | |
80626a55 DE |
8312 | /* DWO/DWP files. |
8313 | ||
8314 | http://gcc.gnu.org/wiki/DebugFission | |
8315 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
8316 | ||
8317 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
8318 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
8319 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
8320 | |
8321 | static hashval_t | |
8322 | hash_dwo_file (const void *item) | |
8323 | { | |
8324 | const struct dwo_file *dwo_file = item; | |
8325 | ||
0ac5b59e DE |
8326 | return (htab_hash_string (dwo_file->dwo_name) |
8327 | + htab_hash_string (dwo_file->comp_dir)); | |
3019eac3 DE |
8328 | } |
8329 | ||
8330 | static int | |
8331 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
8332 | { | |
8333 | const struct dwo_file *lhs = item_lhs; | |
8334 | const struct dwo_file *rhs = item_rhs; | |
8335 | ||
0ac5b59e DE |
8336 | return (strcmp (lhs->dwo_name, rhs->dwo_name) == 0 |
8337 | && strcmp (lhs->comp_dir, rhs->comp_dir) == 0); | |
3019eac3 DE |
8338 | } |
8339 | ||
8340 | /* Allocate a hash table for DWO files. */ | |
8341 | ||
8342 | static htab_t | |
8343 | allocate_dwo_file_hash_table (void) | |
8344 | { | |
8345 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8346 | ||
8347 | return htab_create_alloc_ex (41, | |
8348 | hash_dwo_file, | |
8349 | eq_dwo_file, | |
8350 | NULL, | |
8351 | &objfile->objfile_obstack, | |
8352 | hashtab_obstack_allocate, | |
8353 | dummy_obstack_deallocate); | |
8354 | } | |
8355 | ||
80626a55 DE |
8356 | /* Lookup DWO file DWO_NAME. */ |
8357 | ||
8358 | static void ** | |
0ac5b59e | 8359 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
8360 | { |
8361 | struct dwo_file find_entry; | |
8362 | void **slot; | |
8363 | ||
8364 | if (dwarf2_per_objfile->dwo_files == NULL) | |
8365 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
8366 | ||
8367 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
8368 | find_entry.dwo_name = dwo_name; |
8369 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
8370 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
8371 | ||
8372 | return slot; | |
8373 | } | |
8374 | ||
3019eac3 DE |
8375 | static hashval_t |
8376 | hash_dwo_unit (const void *item) | |
8377 | { | |
8378 | const struct dwo_unit *dwo_unit = item; | |
8379 | ||
8380 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
8381 | return dwo_unit->signature; | |
8382 | } | |
8383 | ||
8384 | static int | |
8385 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
8386 | { | |
8387 | const struct dwo_unit *lhs = item_lhs; | |
8388 | const struct dwo_unit *rhs = item_rhs; | |
8389 | ||
8390 | /* The signature is assumed to be unique within the DWO file. | |
8391 | So while object file CU dwo_id's always have the value zero, | |
8392 | that's OK, assuming each object file DWO file has only one CU, | |
8393 | and that's the rule for now. */ | |
8394 | return lhs->signature == rhs->signature; | |
8395 | } | |
8396 | ||
8397 | /* Allocate a hash table for DWO CUs,TUs. | |
8398 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
8399 | ||
8400 | static htab_t | |
8401 | allocate_dwo_unit_table (struct objfile *objfile) | |
8402 | { | |
8403 | /* Start out with a pretty small number. | |
8404 | Generally DWO files contain only one CU and maybe some TUs. */ | |
8405 | return htab_create_alloc_ex (3, | |
8406 | hash_dwo_unit, | |
8407 | eq_dwo_unit, | |
8408 | NULL, | |
8409 | &objfile->objfile_obstack, | |
8410 | hashtab_obstack_allocate, | |
8411 | dummy_obstack_deallocate); | |
8412 | } | |
8413 | ||
80626a55 | 8414 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 8415 | |
19c3d4c9 | 8416 | struct create_dwo_cu_data |
3019eac3 DE |
8417 | { |
8418 | struct dwo_file *dwo_file; | |
19c3d4c9 | 8419 | struct dwo_unit dwo_unit; |
3019eac3 DE |
8420 | }; |
8421 | ||
19c3d4c9 | 8422 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
8423 | |
8424 | static void | |
19c3d4c9 DE |
8425 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
8426 | const gdb_byte *info_ptr, | |
8427 | struct die_info *comp_unit_die, | |
8428 | int has_children, | |
8429 | void *datap) | |
3019eac3 DE |
8430 | { |
8431 | struct dwarf2_cu *cu = reader->cu; | |
8432 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8433 | sect_offset offset = cu->per_cu->offset; | |
8a0459fd | 8434 | struct dwarf2_section_info *section = cu->per_cu->section; |
19c3d4c9 | 8435 | struct create_dwo_cu_data *data = datap; |
3019eac3 | 8436 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 8437 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 8438 | struct attribute *attr; |
3019eac3 DE |
8439 | |
8440 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
8441 | if (attr == NULL) | |
8442 | { | |
19c3d4c9 DE |
8443 | complaint (&symfile_complaints, |
8444 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
8445 | " its dwo_id [in module %s]"), | |
8446 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
8447 | return; |
8448 | } | |
8449 | ||
3019eac3 DE |
8450 | dwo_unit->dwo_file = dwo_file; |
8451 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 8452 | dwo_unit->section = section; |
3019eac3 DE |
8453 | dwo_unit->offset = offset; |
8454 | dwo_unit->length = cu->per_cu->length; | |
8455 | ||
09406207 | 8456 | if (dwarf2_read_debug) |
4031ecc5 DE |
8457 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
8458 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
8459 | } |
8460 | ||
19c3d4c9 DE |
8461 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
8462 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 8463 | |
19c3d4c9 DE |
8464 | static struct dwo_unit * |
8465 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
8466 | { |
8467 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8468 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
8469 | bfd *abfd; | |
8470 | htab_t cu_htab; | |
d521ce57 | 8471 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
8472 | struct create_dwo_cu_data create_dwo_cu_data; |
8473 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
8474 | |
8475 | dwarf2_read_section (objfile, section); | |
8476 | info_ptr = section->buffer; | |
8477 | ||
8478 | if (info_ptr == NULL) | |
8479 | return NULL; | |
8480 | ||
8481 | /* We can't set abfd until now because the section may be empty or | |
8482 | not present, in which case section->asection will be NULL. */ | |
8483 | abfd = section->asection->owner; | |
8484 | ||
09406207 | 8485 | if (dwarf2_read_debug) |
19c3d4c9 DE |
8486 | { |
8487 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
8488 | bfd_section_name (abfd, section->asection), | |
8489 | bfd_get_filename (abfd)); | |
8490 | } | |
3019eac3 | 8491 | |
19c3d4c9 DE |
8492 | create_dwo_cu_data.dwo_file = dwo_file; |
8493 | dwo_unit = NULL; | |
3019eac3 DE |
8494 | |
8495 | end_ptr = info_ptr + section->size; | |
8496 | while (info_ptr < end_ptr) | |
8497 | { | |
8498 | struct dwarf2_per_cu_data per_cu; | |
8499 | ||
19c3d4c9 DE |
8500 | memset (&create_dwo_cu_data.dwo_unit, 0, |
8501 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
8502 | memset (&per_cu, 0, sizeof (per_cu)); |
8503 | per_cu.objfile = objfile; | |
8504 | per_cu.is_debug_types = 0; | |
8505 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 8506 | per_cu.section = section; |
3019eac3 DE |
8507 | |
8508 | init_cutu_and_read_dies_no_follow (&per_cu, | |
8509 | &dwo_file->sections.abbrev, | |
8510 | dwo_file, | |
19c3d4c9 DE |
8511 | create_dwo_cu_reader, |
8512 | &create_dwo_cu_data); | |
8513 | ||
8514 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
8515 | { | |
8516 | /* If we've already found one, complain. We only support one | |
8517 | because having more than one requires hacking the dwo_name of | |
8518 | each to match, which is highly unlikely to happen. */ | |
8519 | if (dwo_unit != NULL) | |
8520 | { | |
8521 | complaint (&symfile_complaints, | |
8522 | _("Multiple CUs in DWO file %s [in module %s]"), | |
8523 | dwo_file->dwo_name, objfile->name); | |
8524 | break; | |
8525 | } | |
8526 | ||
8527 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8528 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
8529 | } | |
3019eac3 DE |
8530 | |
8531 | info_ptr += per_cu.length; | |
8532 | } | |
8533 | ||
19c3d4c9 | 8534 | return dwo_unit; |
3019eac3 DE |
8535 | } |
8536 | ||
80626a55 DE |
8537 | /* DWP file .debug_{cu,tu}_index section format: |
8538 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
8539 | ||
8540 | Both index sections have the same format, and serve to map a 64-bit | |
8541 | signature to a set of section numbers. Each section begins with a header, | |
8542 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
8543 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
8544 | aligned at 8-byte boundaries in the file. | |
8545 | ||
8546 | The index section header contains two unsigned 32-bit values (using the | |
8547 | byte order of the application binary): | |
8548 | ||
8549 | N, the number of compilation units or type units in the index | |
8550 | M, the number of slots in the hash table | |
8551 | ||
8552 | (We assume that N and M will not exceed 2^32 - 1.) | |
8553 | ||
8554 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
8555 | ||
8556 | The hash table begins at offset 8 in the section, and consists of an array | |
8557 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
8558 | order of the application binary). Unused slots in the hash table are 0. | |
8559 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
8560 | ||
8561 | The parallel table begins immediately after the hash table | |
8562 | (at offset 8 + 8 * M from the beginning of the section), and consists of an | |
8563 | array of 32-bit indexes (using the byte order of the application binary), | |
8564 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
8565 | table contains a 32-bit index into the pool of section numbers. For unused | |
8566 | hash table slots, the corresponding entry in the parallel table will be 0. | |
8567 | ||
8568 | Given a 64-bit compilation unit signature or a type signature S, an entry | |
8569 | in the hash table is located as follows: | |
8570 | ||
8571 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with | |
8572 | the low-order k bits all set to 1. | |
8573 | ||
8574 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). | |
8575 | ||
8576 | 3) If the hash table entry at index H matches the signature, use that | |
8577 | entry. If the hash table entry at index H is unused (all zeroes), | |
8578 | terminate the search: the signature is not present in the table. | |
8579 | ||
8580 | 4) Let H = (H + H') modulo M. Repeat at Step 3. | |
8581 | ||
8582 | Because M > N and H' and M are relatively prime, the search is guaranteed | |
8583 | to stop at an unused slot or find the match. | |
8584 | ||
8585 | The pool of section numbers begins immediately following the hash table | |
8586 | (at offset 8 + 12 * M from the beginning of the section). The pool of | |
8587 | section numbers consists of an array of 32-bit words (using the byte order | |
8588 | of the application binary). Each item in the array is indexed starting | |
8589 | from 0. The hash table entry provides the index of the first section | |
8590 | number in the set. Additional section numbers in the set follow, and the | |
8591 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
8592 | ||
8593 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
8594 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
8595 | be the second entry. Other members of the set may follow in any order. */ | |
8596 | ||
8597 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
8598 | .debug_{info,types}.dwo in DWP_FILE. | |
8599 | Returns NULL if there isn't one. | |
8600 | Note: This function processes DWP files only, not DWO files. */ | |
8601 | ||
8602 | static struct dwp_hash_table * | |
8603 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
8604 | { | |
8605 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8606 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 8607 | const gdb_byte *index_ptr, *index_end; |
80626a55 DE |
8608 | struct dwarf2_section_info *index; |
8609 | uint32_t version, nr_units, nr_slots; | |
8610 | struct dwp_hash_table *htab; | |
8611 | ||
8612 | if (is_debug_types) | |
8613 | index = &dwp_file->sections.tu_index; | |
8614 | else | |
8615 | index = &dwp_file->sections.cu_index; | |
8616 | ||
8617 | if (dwarf2_section_empty_p (index)) | |
8618 | return NULL; | |
8619 | dwarf2_read_section (objfile, index); | |
8620 | ||
8621 | index_ptr = index->buffer; | |
8622 | index_end = index_ptr + index->size; | |
8623 | ||
8624 | version = read_4_bytes (dbfd, index_ptr); | |
8625 | index_ptr += 8; /* Skip the unused word. */ | |
8626 | nr_units = read_4_bytes (dbfd, index_ptr); | |
8627 | index_ptr += 4; | |
8628 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
8629 | index_ptr += 4; | |
8630 | ||
8631 | if (version != 1) | |
8632 | { | |
8633 | error (_("Dwarf Error: unsupported DWP file version (%u)" | |
8634 | " [in module %s]"), | |
8635 | version, dwp_file->name); | |
8636 | } | |
8637 | if (nr_slots != (nr_slots & -nr_slots)) | |
8638 | { | |
8639 | error (_("Dwarf Error: number of slots in DWP hash table (%u)" | |
8640 | " is not power of 2 [in module %s]"), | |
8641 | nr_slots, dwp_file->name); | |
8642 | } | |
8643 | ||
8644 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
8645 | htab->nr_units = nr_units; | |
8646 | htab->nr_slots = nr_slots; | |
8647 | htab->hash_table = index_ptr; | |
8648 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
8649 | htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
8650 | ||
8651 | return htab; | |
8652 | } | |
8653 | ||
8654 | /* Update SECTIONS with the data from SECTP. | |
8655 | ||
8656 | This function is like the other "locate" section routines that are | |
8657 | passed to bfd_map_over_sections, but in this context the sections to | |
8658 | read comes from the DWP hash table, not the full ELF section table. | |
8659 | ||
8660 | The result is non-zero for success, or zero if an error was found. */ | |
8661 | ||
8662 | static int | |
8663 | locate_virtual_dwo_sections (asection *sectp, | |
8664 | struct virtual_dwo_sections *sections) | |
8665 | { | |
8666 | const struct dwop_section_names *names = &dwop_section_names; | |
8667 | ||
8668 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
8669 | { | |
8670 | /* There can be only one. */ | |
8671 | if (sections->abbrev.asection != NULL) | |
8672 | return 0; | |
8673 | sections->abbrev.asection = sectp; | |
8674 | sections->abbrev.size = bfd_get_section_size (sectp); | |
8675 | } | |
8676 | else if (section_is_p (sectp->name, &names->info_dwo) | |
8677 | || section_is_p (sectp->name, &names->types_dwo)) | |
8678 | { | |
8679 | /* There can be only one. */ | |
8680 | if (sections->info_or_types.asection != NULL) | |
8681 | return 0; | |
8682 | sections->info_or_types.asection = sectp; | |
8683 | sections->info_or_types.size = bfd_get_section_size (sectp); | |
8684 | } | |
8685 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
8686 | { | |
8687 | /* There can be only one. */ | |
8688 | if (sections->line.asection != NULL) | |
8689 | return 0; | |
8690 | sections->line.asection = sectp; | |
8691 | sections->line.size = bfd_get_section_size (sectp); | |
8692 | } | |
8693 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
8694 | { | |
8695 | /* There can be only one. */ | |
8696 | if (sections->loc.asection != NULL) | |
8697 | return 0; | |
8698 | sections->loc.asection = sectp; | |
8699 | sections->loc.size = bfd_get_section_size (sectp); | |
8700 | } | |
8701 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
8702 | { | |
8703 | /* There can be only one. */ | |
8704 | if (sections->macinfo.asection != NULL) | |
8705 | return 0; | |
8706 | sections->macinfo.asection = sectp; | |
8707 | sections->macinfo.size = bfd_get_section_size (sectp); | |
8708 | } | |
8709 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
8710 | { | |
8711 | /* There can be only one. */ | |
8712 | if (sections->macro.asection != NULL) | |
8713 | return 0; | |
8714 | sections->macro.asection = sectp; | |
8715 | sections->macro.size = bfd_get_section_size (sectp); | |
8716 | } | |
8717 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
8718 | { | |
8719 | /* There can be only one. */ | |
8720 | if (sections->str_offsets.asection != NULL) | |
8721 | return 0; | |
8722 | sections->str_offsets.asection = sectp; | |
8723 | sections->str_offsets.size = bfd_get_section_size (sectp); | |
8724 | } | |
8725 | else | |
8726 | { | |
8727 | /* No other kind of section is valid. */ | |
8728 | return 0; | |
8729 | } | |
8730 | ||
8731 | return 1; | |
8732 | } | |
8733 | ||
8734 | /* Create a dwo_unit object for the DWO with signature SIGNATURE. | |
8735 | HTAB is the hash table from the DWP file. | |
0ac5b59e DE |
8736 | SECTION_INDEX is the index of the DWO in HTAB. |
8737 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. */ | |
80626a55 DE |
8738 | |
8739 | static struct dwo_unit * | |
8740 | create_dwo_in_dwp (struct dwp_file *dwp_file, | |
8741 | const struct dwp_hash_table *htab, | |
8742 | uint32_t section_index, | |
0ac5b59e | 8743 | const char *comp_dir, |
80626a55 DE |
8744 | ULONGEST signature, int is_debug_types) |
8745 | { | |
8746 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8747 | bfd *dbfd = dwp_file->dbfd; | |
8748 | const char *kind = is_debug_types ? "TU" : "CU"; | |
8749 | struct dwo_file *dwo_file; | |
8750 | struct dwo_unit *dwo_unit; | |
8751 | struct virtual_dwo_sections sections; | |
8752 | void **dwo_file_slot; | |
8753 | char *virtual_dwo_name; | |
8754 | struct dwarf2_section_info *cutu; | |
8755 | struct cleanup *cleanups; | |
8756 | int i; | |
8757 | ||
8758 | if (dwarf2_read_debug) | |
8759 | { | |
4031ecc5 | 8760 | fprintf_unfiltered (gdb_stdlog, "Reading %s %u/%s in DWP file: %s\n", |
80626a55 | 8761 | kind, |
4031ecc5 | 8762 | section_index, hex_string (signature), |
80626a55 DE |
8763 | dwp_file->name); |
8764 | } | |
8765 | ||
8766 | /* Fetch the sections of this DWO. | |
8767 | Put a limit on the number of sections we look for so that bad data | |
8768 | doesn't cause us to loop forever. */ | |
8769 | ||
8770 | #define MAX_NR_DWO_SECTIONS \ | |
8771 | (1 /* .debug_info or .debug_types */ \ | |
8772 | + 1 /* .debug_abbrev */ \ | |
8773 | + 1 /* .debug_line */ \ | |
8774 | + 1 /* .debug_loc */ \ | |
8775 | + 1 /* .debug_str_offsets */ \ | |
8776 | + 1 /* .debug_macro */ \ | |
8777 | + 1 /* .debug_macinfo */ \ | |
8778 | + 1 /* trailing zero */) | |
8779 | ||
8780 | memset (§ions, 0, sizeof (sections)); | |
8781 | cleanups = make_cleanup (null_cleanup, 0); | |
8782 | ||
8783 | for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i) | |
8784 | { | |
8785 | asection *sectp; | |
8786 | uint32_t section_nr = | |
8787 | read_4_bytes (dbfd, | |
8788 | htab->section_pool | |
8789 | + (section_index + i) * sizeof (uint32_t)); | |
8790 | ||
8791 | if (section_nr == 0) | |
8792 | break; | |
8793 | if (section_nr >= dwp_file->num_sections) | |
8794 | { | |
8795 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
8796 | " [in module %s]"), | |
8797 | dwp_file->name); | |
8798 | } | |
8799 | ||
8800 | sectp = dwp_file->elf_sections[section_nr]; | |
8801 | if (! locate_virtual_dwo_sections (sectp, §ions)) | |
8802 | { | |
8803 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
8804 | " [in module %s]"), | |
8805 | dwp_file->name); | |
8806 | } | |
8807 | } | |
8808 | ||
8809 | if (i < 2 | |
8810 | || sections.info_or_types.asection == NULL | |
8811 | || sections.abbrev.asection == NULL) | |
8812 | { | |
8813 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
8814 | " [in module %s]"), | |
8815 | dwp_file->name); | |
8816 | } | |
8817 | if (i == MAX_NR_DWO_SECTIONS) | |
8818 | { | |
8819 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
8820 | " [in module %s]"), | |
8821 | dwp_file->name); | |
8822 | } | |
8823 | ||
8824 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
8825 | have dwo_unit "live" in that. At least for now. | |
8826 | ||
8827 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec DE |
8828 | However, for each CU + set of TUs that came from the same original DWO |
8829 | file, we want to combine them back into a virtual DWO file to save space | |
80626a55 DE |
8830 | (fewer struct dwo_file objects to allocated). Remember that for really |
8831 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
8832 | ||
2792b94d PM |
8833 | virtual_dwo_name = |
8834 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
8835 | sections.abbrev.asection ? sections.abbrev.asection->id : 0, | |
8836 | sections.line.asection ? sections.line.asection->id : 0, | |
8837 | sections.loc.asection ? sections.loc.asection->id : 0, | |
8838 | (sections.str_offsets.asection | |
8839 | ? sections.str_offsets.asection->id | |
8840 | : 0)); | |
80626a55 DE |
8841 | make_cleanup (xfree, virtual_dwo_name); |
8842 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 8843 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
8844 | /* Create one if necessary. */ |
8845 | if (*dwo_file_slot == NULL) | |
8846 | { | |
8847 | if (dwarf2_read_debug) | |
8848 | { | |
8849 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
8850 | virtual_dwo_name); | |
8851 | } | |
8852 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
8853 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, |
8854 | virtual_dwo_name, | |
8855 | strlen (virtual_dwo_name)); | |
8856 | dwo_file->comp_dir = comp_dir; | |
80626a55 DE |
8857 | dwo_file->sections.abbrev = sections.abbrev; |
8858 | dwo_file->sections.line = sections.line; | |
8859 | dwo_file->sections.loc = sections.loc; | |
8860 | dwo_file->sections.macinfo = sections.macinfo; | |
8861 | dwo_file->sections.macro = sections.macro; | |
8862 | dwo_file->sections.str_offsets = sections.str_offsets; | |
8863 | /* The "str" section is global to the entire DWP file. */ | |
8864 | dwo_file->sections.str = dwp_file->sections.str; | |
8865 | /* The info or types section is assigned later to dwo_unit, | |
8866 | there's no need to record it in dwo_file. | |
8867 | Also, we can't simply record type sections in dwo_file because | |
8868 | we record a pointer into the vector in dwo_unit. As we collect more | |
8869 | types we'll grow the vector and eventually have to reallocate space | |
8870 | for it, invalidating all the pointers into the current copy. */ | |
8871 | *dwo_file_slot = dwo_file; | |
8872 | } | |
8873 | else | |
8874 | { | |
8875 | if (dwarf2_read_debug) | |
8876 | { | |
8877 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
8878 | virtual_dwo_name); | |
8879 | } | |
8880 | dwo_file = *dwo_file_slot; | |
8881 | } | |
8882 | do_cleanups (cleanups); | |
8883 | ||
8884 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8885 | dwo_unit->dwo_file = dwo_file; | |
8886 | dwo_unit->signature = signature; | |
8a0459fd DE |
8887 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, |
8888 | sizeof (struct dwarf2_section_info)); | |
8889 | *dwo_unit->section = sections.info_or_types; | |
80626a55 DE |
8890 | /* offset, length, type_offset_in_tu are set later. */ |
8891 | ||
8892 | return dwo_unit; | |
8893 | } | |
8894 | ||
8895 | /* Lookup the DWO with SIGNATURE in DWP_FILE. */ | |
8896 | ||
8897 | static struct dwo_unit * | |
8898 | lookup_dwo_in_dwp (struct dwp_file *dwp_file, | |
8899 | const struct dwp_hash_table *htab, | |
0ac5b59e | 8900 | const char *comp_dir, |
80626a55 DE |
8901 | ULONGEST signature, int is_debug_types) |
8902 | { | |
8903 | bfd *dbfd = dwp_file->dbfd; | |
8904 | uint32_t mask = htab->nr_slots - 1; | |
8905 | uint32_t hash = signature & mask; | |
8906 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
8907 | unsigned int i; | |
8908 | void **slot; | |
8909 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
8910 | ||
8911 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
8912 | find_dwo_cu.signature = signature; | |
8913 | slot = htab_find_slot (dwp_file->loaded_cutus, &find_dwo_cu, INSERT); | |
8914 | ||
8915 | if (*slot != NULL) | |
8916 | return *slot; | |
8917 | ||
8918 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
8919 | for (i = 0; i < htab->nr_slots; ++i) | |
8920 | { | |
8921 | ULONGEST signature_in_table; | |
8922 | ||
8923 | signature_in_table = | |
8924 | read_8_bytes (dbfd, htab->hash_table + hash * sizeof (uint64_t)); | |
8925 | if (signature_in_table == signature) | |
8926 | { | |
8927 | uint32_t section_index = | |
8928 | read_4_bytes (dbfd, htab->unit_table + hash * sizeof (uint32_t)); | |
8929 | ||
8930 | *slot = create_dwo_in_dwp (dwp_file, htab, section_index, | |
0ac5b59e | 8931 | comp_dir, signature, is_debug_types); |
80626a55 DE |
8932 | return *slot; |
8933 | } | |
8934 | if (signature_in_table == 0) | |
8935 | return NULL; | |
8936 | hash = (hash + hash2) & mask; | |
8937 | } | |
8938 | ||
8939 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
8940 | " [in module %s]"), | |
8941 | dwp_file->name); | |
8942 | } | |
8943 | ||
ab5088bf | 8944 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
8945 | Open the file specified by FILE_NAME and hand it off to BFD for |
8946 | preliminary analysis. Return a newly initialized bfd *, which | |
8947 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 8948 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
3019eac3 DE |
8949 | In case of trouble, return NULL. |
8950 | NOTE: This function is derived from symfile_bfd_open. */ | |
8951 | ||
8952 | static bfd * | |
80626a55 | 8953 | try_open_dwop_file (const char *file_name, int is_dwp) |
3019eac3 DE |
8954 | { |
8955 | bfd *sym_bfd; | |
80626a55 | 8956 | int desc, flags; |
3019eac3 | 8957 | char *absolute_name; |
3019eac3 | 8958 | |
80626a55 DE |
8959 | flags = OPF_TRY_CWD_FIRST; |
8960 | if (is_dwp) | |
8961 | flags |= OPF_SEARCH_IN_PATH; | |
8962 | desc = openp (debug_file_directory, flags, file_name, | |
3019eac3 DE |
8963 | O_RDONLY | O_BINARY, &absolute_name); |
8964 | if (desc < 0) | |
8965 | return NULL; | |
8966 | ||
bb397797 | 8967 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
3019eac3 DE |
8968 | if (!sym_bfd) |
8969 | { | |
3019eac3 DE |
8970 | xfree (absolute_name); |
8971 | return NULL; | |
8972 | } | |
a4453b7e | 8973 | xfree (absolute_name); |
3019eac3 DE |
8974 | bfd_set_cacheable (sym_bfd, 1); |
8975 | ||
8976 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
8977 | { | |
cbb099e8 | 8978 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
8979 | return NULL; |
8980 | } | |
8981 | ||
3019eac3 DE |
8982 | return sym_bfd; |
8983 | } | |
8984 | ||
ab5088bf | 8985 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
8986 | COMP_DIR is the DW_AT_comp_dir attribute. |
8987 | The result is the bfd handle of the file. | |
8988 | If there is a problem finding or opening the file, return NULL. | |
8989 | Upon success, the canonicalized path of the file is stored in the bfd, | |
8990 | same as symfile_bfd_open. */ | |
8991 | ||
8992 | static bfd * | |
ab5088bf | 8993 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
8994 | { |
8995 | bfd *abfd; | |
3019eac3 | 8996 | |
80626a55 | 8997 | if (IS_ABSOLUTE_PATH (file_name)) |
ab5088bf | 8998 | return try_open_dwop_file (file_name, 0 /*is_dwp*/); |
3019eac3 DE |
8999 | |
9000 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
9001 | ||
9002 | if (comp_dir != NULL) | |
9003 | { | |
80626a55 | 9004 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
9005 | |
9006 | /* NOTE: If comp_dir is a relative path, this will also try the | |
9007 | search path, which seems useful. */ | |
ab5088bf | 9008 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/); |
3019eac3 DE |
9009 | xfree (path_to_try); |
9010 | if (abfd != NULL) | |
9011 | return abfd; | |
9012 | } | |
9013 | ||
9014 | /* That didn't work, try debug-file-directory, which, despite its name, | |
9015 | is a list of paths. */ | |
9016 | ||
9017 | if (*debug_file_directory == '\0') | |
9018 | return NULL; | |
9019 | ||
ab5088bf | 9020 | return try_open_dwop_file (file_name, 0 /*is_dwp*/); |
3019eac3 DE |
9021 | } |
9022 | ||
80626a55 DE |
9023 | /* This function is mapped across the sections and remembers the offset and |
9024 | size of each of the DWO debugging sections we are interested in. */ | |
9025 | ||
9026 | static void | |
9027 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
9028 | { | |
9029 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
9030 | const struct dwop_section_names *names = &dwop_section_names; | |
9031 | ||
9032 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9033 | { | |
9034 | dwo_sections->abbrev.asection = sectp; | |
9035 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); | |
9036 | } | |
9037 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
9038 | { | |
9039 | dwo_sections->info.asection = sectp; | |
9040 | dwo_sections->info.size = bfd_get_section_size (sectp); | |
9041 | } | |
9042 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9043 | { | |
9044 | dwo_sections->line.asection = sectp; | |
9045 | dwo_sections->line.size = bfd_get_section_size (sectp); | |
9046 | } | |
9047 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9048 | { | |
9049 | dwo_sections->loc.asection = sectp; | |
9050 | dwo_sections->loc.size = bfd_get_section_size (sectp); | |
9051 | } | |
9052 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9053 | { | |
9054 | dwo_sections->macinfo.asection = sectp; | |
9055 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); | |
9056 | } | |
9057 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9058 | { | |
9059 | dwo_sections->macro.asection = sectp; | |
9060 | dwo_sections->macro.size = bfd_get_section_size (sectp); | |
9061 | } | |
9062 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
9063 | { | |
9064 | dwo_sections->str.asection = sectp; | |
9065 | dwo_sections->str.size = bfd_get_section_size (sectp); | |
9066 | } | |
9067 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9068 | { | |
9069 | dwo_sections->str_offsets.asection = sectp; | |
9070 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); | |
9071 | } | |
9072 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
9073 | { | |
9074 | struct dwarf2_section_info type_section; | |
9075 | ||
9076 | memset (&type_section, 0, sizeof (type_section)); | |
9077 | type_section.asection = sectp; | |
9078 | type_section.size = bfd_get_section_size (sectp); | |
9079 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
9080 | &type_section); | |
9081 | } | |
9082 | } | |
9083 | ||
ab5088bf | 9084 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 9085 | by PER_CU. This is for the non-DWP case. |
80626a55 | 9086 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
9087 | |
9088 | static struct dwo_file * | |
0ac5b59e DE |
9089 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
9090 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
9091 | { |
9092 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9093 | struct dwo_file *dwo_file; |
9094 | bfd *dbfd; | |
3019eac3 DE |
9095 | struct cleanup *cleanups; |
9096 | ||
ab5088bf | 9097 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
9098 | if (dbfd == NULL) |
9099 | { | |
9100 | if (dwarf2_read_debug) | |
9101 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
9102 | return NULL; | |
9103 | } | |
9104 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
9105 | dwo_file->dwo_name = dwo_name; |
9106 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 9107 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
9108 | |
9109 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
9110 | ||
80626a55 | 9111 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 9112 | |
19c3d4c9 | 9113 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
9114 | |
9115 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
9116 | dwo_file->sections.types); | |
9117 | ||
9118 | discard_cleanups (cleanups); | |
9119 | ||
80626a55 DE |
9120 | if (dwarf2_read_debug) |
9121 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
9122 | ||
3019eac3 DE |
9123 | return dwo_file; |
9124 | } | |
9125 | ||
80626a55 DE |
9126 | /* This function is mapped across the sections and remembers the offset and |
9127 | size of each of the DWP debugging sections we are interested in. */ | |
3019eac3 | 9128 | |
80626a55 DE |
9129 | static void |
9130 | dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
3019eac3 | 9131 | { |
80626a55 DE |
9132 | struct dwp_file *dwp_file = dwp_file_ptr; |
9133 | const struct dwop_section_names *names = &dwop_section_names; | |
9134 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 9135 | |
80626a55 DE |
9136 | /* Record the ELF section number for later lookup: this is what the |
9137 | .debug_cu_index,.debug_tu_index tables use. */ | |
9138 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
9139 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 9140 | |
80626a55 DE |
9141 | /* Look for specific sections that we need. */ |
9142 | if (section_is_p (sectp->name, &names->str_dwo)) | |
9143 | { | |
9144 | dwp_file->sections.str.asection = sectp; | |
9145 | dwp_file->sections.str.size = bfd_get_section_size (sectp); | |
9146 | } | |
9147 | else if (section_is_p (sectp->name, &names->cu_index)) | |
9148 | { | |
9149 | dwp_file->sections.cu_index.asection = sectp; | |
9150 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); | |
9151 | } | |
9152 | else if (section_is_p (sectp->name, &names->tu_index)) | |
9153 | { | |
9154 | dwp_file->sections.tu_index.asection = sectp; | |
9155 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); | |
9156 | } | |
9157 | } | |
3019eac3 | 9158 | |
80626a55 | 9159 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9160 | |
80626a55 DE |
9161 | static hashval_t |
9162 | hash_dwp_loaded_cutus (const void *item) | |
9163 | { | |
9164 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 9165 | |
80626a55 DE |
9166 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
9167 | return dwo_unit->signature; | |
3019eac3 DE |
9168 | } |
9169 | ||
80626a55 | 9170 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9171 | |
80626a55 DE |
9172 | static int |
9173 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 9174 | { |
80626a55 DE |
9175 | const struct dwo_unit *dua = a; |
9176 | const struct dwo_unit *dub = b; | |
3019eac3 | 9177 | |
80626a55 DE |
9178 | return dua->signature == dub->signature; |
9179 | } | |
3019eac3 | 9180 | |
80626a55 | 9181 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9182 | |
80626a55 DE |
9183 | static htab_t |
9184 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
9185 | { | |
9186 | return htab_create_alloc_ex (3, | |
9187 | hash_dwp_loaded_cutus, | |
9188 | eq_dwp_loaded_cutus, | |
9189 | NULL, | |
9190 | &objfile->objfile_obstack, | |
9191 | hashtab_obstack_allocate, | |
9192 | dummy_obstack_deallocate); | |
9193 | } | |
3019eac3 | 9194 | |
ab5088bf DE |
9195 | /* Try to open DWP file FILE_NAME. |
9196 | The result is the bfd handle of the file. | |
9197 | If there is a problem finding or opening the file, return NULL. | |
9198 | Upon success, the canonicalized path of the file is stored in the bfd, | |
9199 | same as symfile_bfd_open. */ | |
9200 | ||
9201 | static bfd * | |
9202 | open_dwp_file (const char *file_name) | |
9203 | { | |
9204 | return try_open_dwop_file (file_name, 1 /*is_dwp*/); | |
9205 | } | |
9206 | ||
80626a55 DE |
9207 | /* Initialize the use of the DWP file for the current objfile. |
9208 | By convention the name of the DWP file is ${objfile}.dwp. | |
9209 | The result is NULL if it can't be found. */ | |
a766d390 | 9210 | |
80626a55 | 9211 | static struct dwp_file * |
ab5088bf | 9212 | open_and_init_dwp_file (void) |
80626a55 DE |
9213 | { |
9214 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9215 | struct dwp_file *dwp_file; | |
9216 | char *dwp_name; | |
9217 | bfd *dbfd; | |
9218 | struct cleanup *cleanups; | |
9219 | ||
2792b94d | 9220 | dwp_name = xstrprintf ("%s.dwp", dwarf2_per_objfile->objfile->name); |
80626a55 DE |
9221 | cleanups = make_cleanup (xfree, dwp_name); |
9222 | ||
ab5088bf | 9223 | dbfd = open_dwp_file (dwp_name); |
80626a55 DE |
9224 | if (dbfd == NULL) |
9225 | { | |
9226 | if (dwarf2_read_debug) | |
9227 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
9228 | do_cleanups (cleanups); | |
9229 | return NULL; | |
3019eac3 | 9230 | } |
80626a55 DE |
9231 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
9232 | dwp_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
9233 | dwp_name, strlen (dwp_name)); | |
9234 | dwp_file->dbfd = dbfd; | |
9235 | do_cleanups (cleanups); | |
c906108c | 9236 | |
80626a55 DE |
9237 | /* +1: section 0 is unused */ |
9238 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
9239 | dwp_file->elf_sections = | |
9240 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
9241 | dwp_file->num_sections, asection *); | |
9242 | ||
9243 | bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file); | |
9244 | ||
9245 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
9246 | ||
9247 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
9248 | ||
9249 | dwp_file->loaded_cutus = allocate_dwp_loaded_cutus_table (objfile); | |
9250 | ||
80626a55 DE |
9251 | if (dwarf2_read_debug) |
9252 | { | |
9253 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
9254 | fprintf_unfiltered (gdb_stdlog, | |
9255 | " %u CUs, %u TUs\n", | |
9256 | dwp_file->cus ? dwp_file->cus->nr_units : 0, | |
9257 | dwp_file->tus ? dwp_file->tus->nr_units : 0); | |
9258 | } | |
9259 | ||
9260 | return dwp_file; | |
3019eac3 | 9261 | } |
c906108c | 9262 | |
ab5088bf DE |
9263 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
9264 | ||
9265 | static struct dwp_file * | |
9266 | get_dwp_file (void) | |
9267 | { | |
9268 | if (! dwarf2_per_objfile->dwp_checked) | |
9269 | { | |
9270 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
9271 | dwarf2_per_objfile->dwp_checked = 1; | |
9272 | } | |
9273 | return dwarf2_per_objfile->dwp_file; | |
9274 | } | |
9275 | ||
80626a55 DE |
9276 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
9277 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
9278 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 9279 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
9280 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
9281 | ||
9282 | This is called, for example, when wanting to read a variable with a | |
9283 | complex location. Therefore we don't want to do file i/o for every call. | |
9284 | Therefore we don't want to look for a DWO file on every call. | |
9285 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
9286 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
9287 | for a DWO file. | |
9288 | ||
1c658ad5 | 9289 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 9290 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 9291 | |
3019eac3 | 9292 | static struct dwo_unit * |
80626a55 DE |
9293 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
9294 | const char *dwo_name, const char *comp_dir, | |
9295 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
9296 | { |
9297 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9298 | const char *kind = is_debug_types ? "TU" : "CU"; |
9299 | void **dwo_file_slot; | |
3019eac3 | 9300 | struct dwo_file *dwo_file; |
80626a55 | 9301 | struct dwp_file *dwp_file; |
cb1df416 | 9302 | |
6a506a2d DE |
9303 | /* First see if there's a DWP file. |
9304 | If we have a DWP file but didn't find the DWO inside it, don't | |
9305 | look for the original DWO file. It makes gdb behave differently | |
9306 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 9307 | |
ab5088bf | 9308 | dwp_file = get_dwp_file (); |
80626a55 | 9309 | if (dwp_file != NULL) |
cf2c3c16 | 9310 | { |
80626a55 DE |
9311 | const struct dwp_hash_table *dwp_htab = |
9312 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
9313 | ||
9314 | if (dwp_htab != NULL) | |
9315 | { | |
9316 | struct dwo_unit *dwo_cutu = | |
0ac5b59e DE |
9317 | lookup_dwo_in_dwp (dwp_file, dwp_htab, comp_dir, |
9318 | signature, is_debug_types); | |
80626a55 DE |
9319 | |
9320 | if (dwo_cutu != NULL) | |
9321 | { | |
9322 | if (dwarf2_read_debug) | |
9323 | { | |
9324 | fprintf_unfiltered (gdb_stdlog, | |
9325 | "Virtual DWO %s %s found: @%s\n", | |
9326 | kind, hex_string (signature), | |
9327 | host_address_to_string (dwo_cutu)); | |
9328 | } | |
9329 | return dwo_cutu; | |
9330 | } | |
9331 | } | |
9332 | } | |
6a506a2d | 9333 | else |
80626a55 | 9334 | { |
6a506a2d | 9335 | /* No DWP file, look for the DWO file. */ |
80626a55 | 9336 | |
6a506a2d DE |
9337 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
9338 | if (*dwo_file_slot == NULL) | |
80626a55 | 9339 | { |
6a506a2d DE |
9340 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
9341 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 9342 | } |
6a506a2d DE |
9343 | /* NOTE: This will be NULL if unable to open the file. */ |
9344 | dwo_file = *dwo_file_slot; | |
3019eac3 | 9345 | |
6a506a2d | 9346 | if (dwo_file != NULL) |
19c3d4c9 | 9347 | { |
6a506a2d DE |
9348 | struct dwo_unit *dwo_cutu = NULL; |
9349 | ||
9350 | if (is_debug_types && dwo_file->tus) | |
9351 | { | |
9352 | struct dwo_unit find_dwo_cutu; | |
9353 | ||
9354 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
9355 | find_dwo_cutu.signature = signature; | |
9356 | dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu); | |
9357 | } | |
9358 | else if (!is_debug_types && dwo_file->cu) | |
80626a55 | 9359 | { |
6a506a2d DE |
9360 | if (signature == dwo_file->cu->signature) |
9361 | dwo_cutu = dwo_file->cu; | |
9362 | } | |
9363 | ||
9364 | if (dwo_cutu != NULL) | |
9365 | { | |
9366 | if (dwarf2_read_debug) | |
9367 | { | |
9368 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
9369 | kind, dwo_name, hex_string (signature), | |
9370 | host_address_to_string (dwo_cutu)); | |
9371 | } | |
9372 | return dwo_cutu; | |
80626a55 DE |
9373 | } |
9374 | } | |
2e276125 | 9375 | } |
9cdd5dbd | 9376 | |
80626a55 DE |
9377 | /* We didn't find it. This could mean a dwo_id mismatch, or |
9378 | someone deleted the DWO/DWP file, or the search path isn't set up | |
9379 | correctly to find the file. */ | |
9380 | ||
9381 | if (dwarf2_read_debug) | |
9382 | { | |
9383 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
9384 | kind, dwo_name, hex_string (signature)); | |
9385 | } | |
3019eac3 DE |
9386 | |
9387 | complaint (&symfile_complaints, | |
6a506a2d | 9388 | _("Could not find DWO %s %s(%s) referenced by CU at offset 0x%x" |
3019eac3 | 9389 | " [in module %s]"), |
6a506a2d DE |
9390 | kind, dwo_name, hex_string (signature), |
9391 | this_unit->offset.sect_off, objfile->name); | |
3019eac3 | 9392 | return NULL; |
5fb290d7 DJ |
9393 | } |
9394 | ||
80626a55 DE |
9395 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
9396 | See lookup_dwo_cutu_unit for details. */ | |
9397 | ||
9398 | static struct dwo_unit * | |
9399 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
9400 | const char *dwo_name, const char *comp_dir, | |
9401 | ULONGEST signature) | |
9402 | { | |
9403 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
9404 | } | |
9405 | ||
9406 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
9407 | See lookup_dwo_cutu_unit for details. */ | |
9408 | ||
9409 | static struct dwo_unit * | |
9410 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
9411 | const char *dwo_name, const char *comp_dir) | |
9412 | { | |
9413 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
9414 | } | |
9415 | ||
3019eac3 DE |
9416 | /* Free all resources associated with DWO_FILE. |
9417 | Close the DWO file and munmap the sections. | |
9418 | All memory should be on the objfile obstack. */ | |
348e048f DE |
9419 | |
9420 | static void | |
3019eac3 | 9421 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 9422 | { |
3019eac3 DE |
9423 | int ix; |
9424 | struct dwarf2_section_info *section; | |
348e048f | 9425 | |
5c6fa7ab | 9426 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 9427 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 9428 | |
3019eac3 DE |
9429 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
9430 | } | |
348e048f | 9431 | |
3019eac3 | 9432 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 9433 | |
3019eac3 DE |
9434 | static void |
9435 | free_dwo_file_cleanup (void *arg) | |
9436 | { | |
9437 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
9438 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 9439 | |
3019eac3 DE |
9440 | free_dwo_file (dwo_file, objfile); |
9441 | } | |
348e048f | 9442 | |
3019eac3 | 9443 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 9444 | |
3019eac3 DE |
9445 | static int |
9446 | free_dwo_file_from_slot (void **slot, void *info) | |
9447 | { | |
9448 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
9449 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 9450 | |
3019eac3 | 9451 | free_dwo_file (dwo_file, objfile); |
348e048f | 9452 | |
3019eac3 DE |
9453 | return 1; |
9454 | } | |
348e048f | 9455 | |
3019eac3 | 9456 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 9457 | |
3019eac3 DE |
9458 | static void |
9459 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
9460 | { | |
9461 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 9462 | } |
3019eac3 DE |
9463 | \f |
9464 | /* Read in various DIEs. */ | |
348e048f | 9465 | |
d389af10 JK |
9466 | /* qsort helper for inherit_abstract_dies. */ |
9467 | ||
9468 | static int | |
9469 | unsigned_int_compar (const void *ap, const void *bp) | |
9470 | { | |
9471 | unsigned int a = *(unsigned int *) ap; | |
9472 | unsigned int b = *(unsigned int *) bp; | |
9473 | ||
9474 | return (a > b) - (b > a); | |
9475 | } | |
9476 | ||
9477 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
9478 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
9479 | already referenced by DW_AT_abstract_origin from the children of the | |
9480 | current DIE. */ | |
d389af10 JK |
9481 | |
9482 | static void | |
9483 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
9484 | { | |
9485 | struct die_info *child_die; | |
9486 | unsigned die_children_count; | |
9487 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
9488 | sect_offset *offsets; |
9489 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
9490 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
9491 | struct die_info *origin_die; | |
9492 | /* Iterator of the ORIGIN_DIE children. */ | |
9493 | struct die_info *origin_child_die; | |
9494 | struct cleanup *cleanups; | |
9495 | struct attribute *attr; | |
cd02d79d PA |
9496 | struct dwarf2_cu *origin_cu; |
9497 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
9498 | |
9499 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9500 | if (!attr) | |
9501 | return; | |
9502 | ||
cd02d79d PA |
9503 | /* Note that following die references may follow to a die in a |
9504 | different cu. */ | |
9505 | ||
9506 | origin_cu = cu; | |
9507 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
9508 | ||
9509 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
9510 | symbols in. */ | |
9511 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
9512 | origin_cu->list_in_scope = cu->list_in_scope; | |
9513 | ||
edb3359d DJ |
9514 | if (die->tag != origin_die->tag |
9515 | && !(die->tag == DW_TAG_inlined_subroutine | |
9516 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9517 | complaint (&symfile_complaints, |
9518 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 9519 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
9520 | |
9521 | child_die = die->child; | |
9522 | die_children_count = 0; | |
9523 | while (child_die && child_die->tag) | |
9524 | { | |
9525 | child_die = sibling_die (child_die); | |
9526 | die_children_count++; | |
9527 | } | |
9528 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
9529 | cleanups = make_cleanup (xfree, offsets); | |
9530 | ||
9531 | offsets_end = offsets; | |
9532 | child_die = die->child; | |
9533 | while (child_die && child_die->tag) | |
9534 | { | |
c38f313d DJ |
9535 | /* For each CHILD_DIE, find the corresponding child of |
9536 | ORIGIN_DIE. If there is more than one layer of | |
9537 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
9538 | but GCC versions at least through 4.4 generate this (GCC PR | |
9539 | 40573). */ | |
9540 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 9541 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 9542 | |
c38f313d DJ |
9543 | while (1) |
9544 | { | |
cd02d79d PA |
9545 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
9546 | child_origin_cu); | |
c38f313d DJ |
9547 | if (attr == NULL) |
9548 | break; | |
cd02d79d PA |
9549 | child_origin_die = follow_die_ref (child_origin_die, attr, |
9550 | &child_origin_cu); | |
c38f313d DJ |
9551 | } |
9552 | ||
d389af10 JK |
9553 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
9554 | counterpart may exist. */ | |
c38f313d | 9555 | if (child_origin_die != child_die) |
d389af10 | 9556 | { |
edb3359d DJ |
9557 | if (child_die->tag != child_origin_die->tag |
9558 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
9559 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9560 | complaint (&symfile_complaints, |
9561 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9562 | "different tags"), child_die->offset.sect_off, |
9563 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9564 | if (child_origin_die->parent != origin_die) |
9565 | complaint (&symfile_complaints, | |
9566 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9567 | "different parents"), child_die->offset.sect_off, |
9568 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9569 | else |
9570 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
9571 | } |
9572 | child_die = sibling_die (child_die); | |
9573 | } | |
9574 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
9575 | unsigned_int_compar); | |
9576 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 9577 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
9578 | complaint (&symfile_complaints, |
9579 | _("Multiple children of DIE 0x%x refer " | |
9580 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 9581 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
9582 | |
9583 | offsetp = offsets; | |
9584 | origin_child_die = origin_die->child; | |
9585 | while (origin_child_die && origin_child_die->tag) | |
9586 | { | |
9587 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
9588 | while (offsetp < offsets_end |
9589 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 9590 | offsetp++; |
b64f50a1 JK |
9591 | if (offsetp >= offsets_end |
9592 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 JK |
9593 | { |
9594 | /* Found that ORIGIN_CHILD_DIE is really not referenced. */ | |
cd02d79d | 9595 | process_die (origin_child_die, origin_cu); |
d389af10 JK |
9596 | } |
9597 | origin_child_die = sibling_die (origin_child_die); | |
9598 | } | |
cd02d79d | 9599 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
9600 | |
9601 | do_cleanups (cleanups); | |
9602 | } | |
9603 | ||
c906108c | 9604 | static void |
e7c27a73 | 9605 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9606 | { |
e7c27a73 | 9607 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9608 | struct context_stack *new; |
c906108c SS |
9609 | CORE_ADDR lowpc; |
9610 | CORE_ADDR highpc; | |
9611 | struct die_info *child_die; | |
edb3359d | 9612 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 9613 | const char *name; |
e142c38c | 9614 | CORE_ADDR baseaddr; |
801e3a5b | 9615 | struct block *block; |
edb3359d | 9616 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
9617 | VEC (symbolp) *template_args = NULL; |
9618 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
9619 | |
9620 | if (inlined_func) | |
9621 | { | |
9622 | /* If we do not have call site information, we can't show the | |
9623 | caller of this inlined function. That's too confusing, so | |
9624 | only use the scope for local variables. */ | |
9625 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
9626 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
9627 | if (call_line == NULL || call_file == NULL) | |
9628 | { | |
9629 | read_lexical_block_scope (die, cu); | |
9630 | return; | |
9631 | } | |
9632 | } | |
c906108c | 9633 | |
e142c38c DJ |
9634 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
9635 | ||
94af9270 | 9636 | name = dwarf2_name (die, cu); |
c906108c | 9637 | |
e8d05480 JB |
9638 | /* Ignore functions with missing or empty names. These are actually |
9639 | illegal according to the DWARF standard. */ | |
9640 | if (name == NULL) | |
9641 | { | |
9642 | complaint (&symfile_complaints, | |
b64f50a1 JK |
9643 | _("missing name for subprogram DIE at %d"), |
9644 | die->offset.sect_off); | |
e8d05480 JB |
9645 | return; |
9646 | } | |
9647 | ||
9648 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
9649 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
9650 | { | |
ae4d0c03 PM |
9651 | attr = dwarf2_attr (die, DW_AT_external, cu); |
9652 | if (!attr || !DW_UNSND (attr)) | |
9653 | complaint (&symfile_complaints, | |
3e43a32a MS |
9654 | _("cannot get low and high bounds " |
9655 | "for subprogram DIE at %d"), | |
b64f50a1 | 9656 | die->offset.sect_off); |
e8d05480 JB |
9657 | return; |
9658 | } | |
c906108c SS |
9659 | |
9660 | lowpc += baseaddr; | |
9661 | highpc += baseaddr; | |
9662 | ||
34eaf542 TT |
9663 | /* If we have any template arguments, then we must allocate a |
9664 | different sort of symbol. */ | |
9665 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
9666 | { | |
9667 | if (child_die->tag == DW_TAG_template_type_param | |
9668 | || child_die->tag == DW_TAG_template_value_param) | |
9669 | { | |
e623cf5d | 9670 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
9671 | templ_func->base.is_cplus_template_function = 1; |
9672 | break; | |
9673 | } | |
9674 | } | |
9675 | ||
c906108c | 9676 | new = push_context (0, lowpc); |
34eaf542 TT |
9677 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
9678 | (struct symbol *) templ_func); | |
4c2df51b | 9679 | |
4cecd739 DJ |
9680 | /* If there is a location expression for DW_AT_frame_base, record |
9681 | it. */ | |
e142c38c | 9682 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 9683 | if (attr) |
f1e6e072 | 9684 | dwarf2_symbol_mark_computed (attr, new->name, cu, 1); |
4c2df51b | 9685 | |
e142c38c | 9686 | cu->list_in_scope = &local_symbols; |
c906108c | 9687 | |
639d11d3 | 9688 | if (die->child != NULL) |
c906108c | 9689 | { |
639d11d3 | 9690 | child_die = die->child; |
c906108c SS |
9691 | while (child_die && child_die->tag) |
9692 | { | |
34eaf542 TT |
9693 | if (child_die->tag == DW_TAG_template_type_param |
9694 | || child_die->tag == DW_TAG_template_value_param) | |
9695 | { | |
9696 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
9697 | ||
f1078f66 DJ |
9698 | if (arg != NULL) |
9699 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
9700 | } |
9701 | else | |
9702 | process_die (child_die, cu); | |
c906108c SS |
9703 | child_die = sibling_die (child_die); |
9704 | } | |
9705 | } | |
9706 | ||
d389af10 JK |
9707 | inherit_abstract_dies (die, cu); |
9708 | ||
4a811a97 UW |
9709 | /* If we have a DW_AT_specification, we might need to import using |
9710 | directives from the context of the specification DIE. See the | |
9711 | comment in determine_prefix. */ | |
9712 | if (cu->language == language_cplus | |
9713 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
9714 | { | |
9715 | struct dwarf2_cu *spec_cu = cu; | |
9716 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
9717 | ||
9718 | while (spec_die) | |
9719 | { | |
9720 | child_die = spec_die->child; | |
9721 | while (child_die && child_die->tag) | |
9722 | { | |
9723 | if (child_die->tag == DW_TAG_imported_module) | |
9724 | process_die (child_die, spec_cu); | |
9725 | child_die = sibling_die (child_die); | |
9726 | } | |
9727 | ||
9728 | /* In some cases, GCC generates specification DIEs that | |
9729 | themselves contain DW_AT_specification attributes. */ | |
9730 | spec_die = die_specification (spec_die, &spec_cu); | |
9731 | } | |
9732 | } | |
9733 | ||
c906108c SS |
9734 | new = pop_context (); |
9735 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
9736 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
9737 | lowpc, highpc, objfile); | |
9738 | ||
df8a16a1 | 9739 | /* For C++, set the block's scope. */ |
195a3f6c | 9740 | if ((cu->language == language_cplus || cu->language == language_fortran) |
4d4ec4e5 | 9741 | && cu->processing_has_namespace_info) |
195a3f6c TT |
9742 | block_set_scope (block, determine_prefix (die, cu), |
9743 | &objfile->objfile_obstack); | |
df8a16a1 | 9744 | |
801e3a5b JB |
9745 | /* If we have address ranges, record them. */ |
9746 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 9747 | |
34eaf542 TT |
9748 | /* Attach template arguments to function. */ |
9749 | if (! VEC_empty (symbolp, template_args)) | |
9750 | { | |
9751 | gdb_assert (templ_func != NULL); | |
9752 | ||
9753 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
9754 | templ_func->template_arguments | |
9755 | = obstack_alloc (&objfile->objfile_obstack, | |
9756 | (templ_func->n_template_arguments | |
9757 | * sizeof (struct symbol *))); | |
9758 | memcpy (templ_func->template_arguments, | |
9759 | VEC_address (symbolp, template_args), | |
9760 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
9761 | VEC_free (symbolp, template_args); | |
9762 | } | |
9763 | ||
208d8187 JB |
9764 | /* In C++, we can have functions nested inside functions (e.g., when |
9765 | a function declares a class that has methods). This means that | |
9766 | when we finish processing a function scope, we may need to go | |
9767 | back to building a containing block's symbol lists. */ | |
9768 | local_symbols = new->locals; | |
27aa8d6a | 9769 | using_directives = new->using_directives; |
208d8187 | 9770 | |
921e78cf JB |
9771 | /* If we've finished processing a top-level function, subsequent |
9772 | symbols go in the file symbol list. */ | |
9773 | if (outermost_context_p ()) | |
e142c38c | 9774 | cu->list_in_scope = &file_symbols; |
c906108c SS |
9775 | } |
9776 | ||
9777 | /* Process all the DIES contained within a lexical block scope. Start | |
9778 | a new scope, process the dies, and then close the scope. */ | |
9779 | ||
9780 | static void | |
e7c27a73 | 9781 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9782 | { |
e7c27a73 | 9783 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9784 | struct context_stack *new; |
c906108c SS |
9785 | CORE_ADDR lowpc, highpc; |
9786 | struct die_info *child_die; | |
e142c38c DJ |
9787 | CORE_ADDR baseaddr; |
9788 | ||
9789 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
9790 | |
9791 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
9792 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
9793 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 9794 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 9795 | describe ranges. */ |
d85a05f0 | 9796 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
9797 | return; |
9798 | lowpc += baseaddr; | |
9799 | highpc += baseaddr; | |
9800 | ||
9801 | push_context (0, lowpc); | |
639d11d3 | 9802 | if (die->child != NULL) |
c906108c | 9803 | { |
639d11d3 | 9804 | child_die = die->child; |
c906108c SS |
9805 | while (child_die && child_die->tag) |
9806 | { | |
e7c27a73 | 9807 | process_die (child_die, cu); |
c906108c SS |
9808 | child_die = sibling_die (child_die); |
9809 | } | |
9810 | } | |
9811 | new = pop_context (); | |
9812 | ||
8540c487 | 9813 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 9814 | { |
801e3a5b JB |
9815 | struct block *block |
9816 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
9817 | highpc, objfile); | |
9818 | ||
9819 | /* Note that recording ranges after traversing children, as we | |
9820 | do here, means that recording a parent's ranges entails | |
9821 | walking across all its children's ranges as they appear in | |
9822 | the address map, which is quadratic behavior. | |
9823 | ||
9824 | It would be nicer to record the parent's ranges before | |
9825 | traversing its children, simply overriding whatever you find | |
9826 | there. But since we don't even decide whether to create a | |
9827 | block until after we've traversed its children, that's hard | |
9828 | to do. */ | |
9829 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
9830 | } |
9831 | local_symbols = new->locals; | |
27aa8d6a | 9832 | using_directives = new->using_directives; |
c906108c SS |
9833 | } |
9834 | ||
96408a79 SA |
9835 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
9836 | ||
9837 | static void | |
9838 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9839 | { | |
9840 | struct objfile *objfile = cu->objfile; | |
9841 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
9842 | CORE_ADDR pc, baseaddr; | |
9843 | struct attribute *attr; | |
9844 | struct call_site *call_site, call_site_local; | |
9845 | void **slot; | |
9846 | int nparams; | |
9847 | struct die_info *child_die; | |
9848 | ||
9849 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
9850 | ||
9851 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
9852 | if (!attr) | |
9853 | { | |
9854 | complaint (&symfile_complaints, | |
9855 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
9856 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9857 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9858 | return; |
9859 | } | |
9860 | pc = DW_ADDR (attr) + baseaddr; | |
9861 | ||
9862 | if (cu->call_site_htab == NULL) | |
9863 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
9864 | NULL, &objfile->objfile_obstack, | |
9865 | hashtab_obstack_allocate, NULL); | |
9866 | call_site_local.pc = pc; | |
9867 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
9868 | if (*slot != NULL) | |
9869 | { | |
9870 | complaint (&symfile_complaints, | |
9871 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
9872 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9873 | paddress (gdbarch, pc), die->offset.sect_off, objfile->name); |
96408a79 SA |
9874 | return; |
9875 | } | |
9876 | ||
9877 | /* Count parameters at the caller. */ | |
9878 | ||
9879 | nparams = 0; | |
9880 | for (child_die = die->child; child_die && child_die->tag; | |
9881 | child_die = sibling_die (child_die)) | |
9882 | { | |
9883 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
9884 | { | |
9885 | complaint (&symfile_complaints, | |
9886 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
9887 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9888 | child_die->tag, child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9889 | continue; |
9890 | } | |
9891 | ||
9892 | nparams++; | |
9893 | } | |
9894 | ||
9895 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
9896 | (sizeof (*call_site) | |
9897 | + (sizeof (*call_site->parameter) | |
9898 | * (nparams - 1)))); | |
9899 | *slot = call_site; | |
9900 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
9901 | call_site->pc = pc; | |
9902 | ||
9903 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
9904 | { | |
9905 | struct die_info *func_die; | |
9906 | ||
9907 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
9908 | for (func_die = die->parent; | |
9909 | func_die && func_die->tag != DW_TAG_subprogram | |
9910 | && func_die->tag != DW_TAG_subroutine_type; | |
9911 | func_die = func_die->parent); | |
9912 | ||
9913 | /* DW_AT_GNU_all_call_sites is a superset | |
9914 | of DW_AT_GNU_all_tail_call_sites. */ | |
9915 | if (func_die | |
9916 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
9917 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
9918 | { | |
9919 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
9920 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
9921 | both the initial caller containing the real return address PC and | |
9922 | the final callee containing the current PC of a chain of tail | |
9923 | calls do not need to have the tail call list complete. But any | |
9924 | function candidate for a virtual tail call frame searched via | |
9925 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
9926 | determined unambiguously. */ | |
9927 | } | |
9928 | else | |
9929 | { | |
9930 | struct type *func_type = NULL; | |
9931 | ||
9932 | if (func_die) | |
9933 | func_type = get_die_type (func_die, cu); | |
9934 | if (func_type != NULL) | |
9935 | { | |
9936 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
9937 | ||
9938 | /* Enlist this call site to the function. */ | |
9939 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
9940 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
9941 | } | |
9942 | else | |
9943 | complaint (&symfile_complaints, | |
9944 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
9945 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9946 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9947 | } |
9948 | } | |
9949 | ||
9950 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
9951 | if (attr == NULL) | |
9952 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9953 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
9954 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
9955 | /* Keep NULL DWARF_BLOCK. */; | |
9956 | else if (attr_form_is_block (attr)) | |
9957 | { | |
9958 | struct dwarf2_locexpr_baton *dlbaton; | |
9959 | ||
9960 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
9961 | dlbaton->data = DW_BLOCK (attr)->data; | |
9962 | dlbaton->size = DW_BLOCK (attr)->size; | |
9963 | dlbaton->per_cu = cu->per_cu; | |
9964 | ||
9965 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
9966 | } | |
9967 | else if (is_ref_attr (attr)) | |
9968 | { | |
96408a79 SA |
9969 | struct dwarf2_cu *target_cu = cu; |
9970 | struct die_info *target_die; | |
9971 | ||
ac9ec31b | 9972 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
9973 | gdb_assert (target_cu->objfile == objfile); |
9974 | if (die_is_declaration (target_die, target_cu)) | |
9975 | { | |
9112db09 JK |
9976 | const char *target_physname = NULL; |
9977 | struct attribute *target_attr; | |
9978 | ||
9979 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
9980 | target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu); | |
9981 | if (target_attr == NULL) | |
9982 | target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name, | |
9983 | target_cu); | |
9984 | if (target_attr != NULL && DW_STRING (target_attr) != NULL) | |
9985 | target_physname = DW_STRING (target_attr); | |
9986 | else | |
9987 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
96408a79 SA |
9988 | if (target_physname == NULL) |
9989 | complaint (&symfile_complaints, | |
9990 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
9991 | "physname, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 9992 | die->offset.sect_off, objfile->name); |
96408a79 | 9993 | else |
7d455152 | 9994 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
9995 | } |
9996 | else | |
9997 | { | |
9998 | CORE_ADDR lowpc; | |
9999 | ||
10000 | /* DW_AT_entry_pc should be preferred. */ | |
10001 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
10002 | complaint (&symfile_complaints, | |
10003 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
10004 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 10005 | die->offset.sect_off, objfile->name); |
96408a79 SA |
10006 | else |
10007 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
10008 | } | |
10009 | } | |
10010 | else | |
10011 | complaint (&symfile_complaints, | |
10012 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
10013 | "block nor reference, for DIE 0x%x [in module %s]"), | |
b64f50a1 | 10014 | die->offset.sect_off, objfile->name); |
96408a79 SA |
10015 | |
10016 | call_site->per_cu = cu->per_cu; | |
10017 | ||
10018 | for (child_die = die->child; | |
10019 | child_die && child_die->tag; | |
10020 | child_die = sibling_die (child_die)) | |
10021 | { | |
96408a79 | 10022 | struct call_site_parameter *parameter; |
1788b2d3 | 10023 | struct attribute *loc, *origin; |
96408a79 SA |
10024 | |
10025 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
10026 | { | |
10027 | /* Already printed the complaint above. */ | |
10028 | continue; | |
10029 | } | |
10030 | ||
10031 | gdb_assert (call_site->parameter_count < nparams); | |
10032 | parameter = &call_site->parameter[call_site->parameter_count]; | |
10033 | ||
1788b2d3 JK |
10034 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
10035 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
10036 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 10037 | |
24c5c679 | 10038 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 JK |
10039 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
10040 | if (loc == NULL && origin != NULL && is_ref_attr (origin)) | |
10041 | { | |
10042 | sect_offset offset; | |
10043 | ||
10044 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
10045 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
10046 | if (!offset_in_cu_p (&cu->header, offset)) |
10047 | { | |
10048 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
10049 | binding can be done only inside one CU. Such referenced DIE | |
10050 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
10051 | complaint (&symfile_complaints, | |
10052 | _("DW_AT_abstract_origin offset is not in CU for " | |
10053 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
10054 | "[in module %s]"), | |
10055 | child_die->offset.sect_off, objfile->name); | |
10056 | continue; | |
10057 | } | |
1788b2d3 JK |
10058 | parameter->u.param_offset.cu_off = (offset.sect_off |
10059 | - cu->header.offset.sect_off); | |
10060 | } | |
10061 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
10062 | { |
10063 | complaint (&symfile_complaints, | |
10064 | _("No DW_FORM_block* DW_AT_location for " | |
10065 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 10066 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
10067 | continue; |
10068 | } | |
24c5c679 | 10069 | else |
96408a79 | 10070 | { |
24c5c679 JK |
10071 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
10072 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
10073 | if (parameter->u.dwarf_reg != -1) | |
10074 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
10075 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
10076 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
10077 | ¶meter->u.fb_offset)) | |
10078 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
10079 | else | |
10080 | { | |
10081 | complaint (&symfile_complaints, | |
10082 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
10083 | "for DW_FORM_block* DW_AT_location is supported for " | |
10084 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
10085 | "[in module %s]"), | |
10086 | child_die->offset.sect_off, objfile->name); | |
10087 | continue; | |
10088 | } | |
96408a79 SA |
10089 | } |
10090 | ||
10091 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
10092 | if (!attr_form_is_block (attr)) | |
10093 | { | |
10094 | complaint (&symfile_complaints, | |
10095 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
10096 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 10097 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
10098 | continue; |
10099 | } | |
10100 | parameter->value = DW_BLOCK (attr)->data; | |
10101 | parameter->value_size = DW_BLOCK (attr)->size; | |
10102 | ||
10103 | /* Parameters are not pre-cleared by memset above. */ | |
10104 | parameter->data_value = NULL; | |
10105 | parameter->data_value_size = 0; | |
10106 | call_site->parameter_count++; | |
10107 | ||
10108 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
10109 | if (attr) | |
10110 | { | |
10111 | if (!attr_form_is_block (attr)) | |
10112 | complaint (&symfile_complaints, | |
10113 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
10114 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 10115 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
10116 | else |
10117 | { | |
10118 | parameter->data_value = DW_BLOCK (attr)->data; | |
10119 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
10120 | } | |
10121 | } | |
10122 | } | |
10123 | } | |
10124 | ||
43039443 | 10125 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
10126 | Return 1 if the attributes are present and valid, otherwise, return 0. |
10127 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
10128 | |
10129 | static int | |
10130 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
10131 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
10132 | struct partial_symtab *ranges_pst) | |
43039443 JK |
10133 | { |
10134 | struct objfile *objfile = cu->objfile; | |
10135 | struct comp_unit_head *cu_header = &cu->header; | |
10136 | bfd *obfd = objfile->obfd; | |
10137 | unsigned int addr_size = cu_header->addr_size; | |
10138 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
10139 | /* Base address selection entry. */ | |
10140 | CORE_ADDR base; | |
10141 | int found_base; | |
10142 | unsigned int dummy; | |
d521ce57 | 10143 | const gdb_byte *buffer; |
43039443 JK |
10144 | CORE_ADDR marker; |
10145 | int low_set; | |
10146 | CORE_ADDR low = 0; | |
10147 | CORE_ADDR high = 0; | |
ff013f42 | 10148 | CORE_ADDR baseaddr; |
43039443 | 10149 | |
d00adf39 DE |
10150 | found_base = cu->base_known; |
10151 | base = cu->base_address; | |
43039443 | 10152 | |
be391dca | 10153 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 10154 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
10155 | { |
10156 | complaint (&symfile_complaints, | |
10157 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
10158 | offset); | |
10159 | return 0; | |
10160 | } | |
dce234bc | 10161 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
10162 | |
10163 | /* Read in the largest possible address. */ | |
10164 | marker = read_address (obfd, buffer, cu, &dummy); | |
10165 | if ((marker & mask) == mask) | |
10166 | { | |
10167 | /* If we found the largest possible address, then | |
10168 | read the base address. */ | |
10169 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
10170 | buffer += 2 * addr_size; | |
10171 | offset += 2 * addr_size; | |
10172 | found_base = 1; | |
10173 | } | |
10174 | ||
10175 | low_set = 0; | |
10176 | ||
e7030f15 | 10177 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 10178 | |
43039443 JK |
10179 | while (1) |
10180 | { | |
10181 | CORE_ADDR range_beginning, range_end; | |
10182 | ||
10183 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
10184 | buffer += addr_size; | |
10185 | range_end = read_address (obfd, buffer, cu, &dummy); | |
10186 | buffer += addr_size; | |
10187 | offset += 2 * addr_size; | |
10188 | ||
10189 | /* An end of list marker is a pair of zero addresses. */ | |
10190 | if (range_beginning == 0 && range_end == 0) | |
10191 | /* Found the end of list entry. */ | |
10192 | break; | |
10193 | ||
10194 | /* Each base address selection entry is a pair of 2 values. | |
10195 | The first is the largest possible address, the second is | |
10196 | the base address. Check for a base address here. */ | |
10197 | if ((range_beginning & mask) == mask) | |
10198 | { | |
10199 | /* If we found the largest possible address, then | |
10200 | read the base address. */ | |
10201 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
10202 | found_base = 1; | |
10203 | continue; | |
10204 | } | |
10205 | ||
10206 | if (!found_base) | |
10207 | { | |
10208 | /* We have no valid base address for the ranges | |
10209 | data. */ | |
10210 | complaint (&symfile_complaints, | |
10211 | _("Invalid .debug_ranges data (no base address)")); | |
10212 | return 0; | |
10213 | } | |
10214 | ||
9277c30c UW |
10215 | if (range_beginning > range_end) |
10216 | { | |
10217 | /* Inverted range entries are invalid. */ | |
10218 | complaint (&symfile_complaints, | |
10219 | _("Invalid .debug_ranges data (inverted range)")); | |
10220 | return 0; | |
10221 | } | |
10222 | ||
10223 | /* Empty range entries have no effect. */ | |
10224 | if (range_beginning == range_end) | |
10225 | continue; | |
10226 | ||
43039443 JK |
10227 | range_beginning += base; |
10228 | range_end += base; | |
10229 | ||
01093045 DE |
10230 | /* A not-uncommon case of bad debug info. |
10231 | Don't pollute the addrmap with bad data. */ | |
10232 | if (range_beginning + baseaddr == 0 | |
10233 | && !dwarf2_per_objfile->has_section_at_zero) | |
10234 | { | |
10235 | complaint (&symfile_complaints, | |
10236 | _(".debug_ranges entry has start address of zero" | |
10237 | " [in module %s]"), objfile->name); | |
10238 | continue; | |
10239 | } | |
10240 | ||
9277c30c | 10241 | if (ranges_pst != NULL) |
ff013f42 | 10242 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
10243 | range_beginning + baseaddr, |
10244 | range_end - 1 + baseaddr, | |
ff013f42 JK |
10245 | ranges_pst); |
10246 | ||
43039443 JK |
10247 | /* FIXME: This is recording everything as a low-high |
10248 | segment of consecutive addresses. We should have a | |
10249 | data structure for discontiguous block ranges | |
10250 | instead. */ | |
10251 | if (! low_set) | |
10252 | { | |
10253 | low = range_beginning; | |
10254 | high = range_end; | |
10255 | low_set = 1; | |
10256 | } | |
10257 | else | |
10258 | { | |
10259 | if (range_beginning < low) | |
10260 | low = range_beginning; | |
10261 | if (range_end > high) | |
10262 | high = range_end; | |
10263 | } | |
10264 | } | |
10265 | ||
10266 | if (! low_set) | |
10267 | /* If the first entry is an end-of-list marker, the range | |
10268 | describes an empty scope, i.e. no instructions. */ | |
10269 | return 0; | |
10270 | ||
10271 | if (low_return) | |
10272 | *low_return = low; | |
10273 | if (high_return) | |
10274 | *high_return = high; | |
10275 | return 1; | |
10276 | } | |
10277 | ||
af34e669 DJ |
10278 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
10279 | are present and valid, otherwise, return 0. Return -1 if the range is | |
10280 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 10281 | |
c906108c | 10282 | static int |
af34e669 | 10283 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
10284 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
10285 | struct partial_symtab *pst) | |
c906108c SS |
10286 | { |
10287 | struct attribute *attr; | |
91da1414 | 10288 | struct attribute *attr_high; |
af34e669 DJ |
10289 | CORE_ADDR low = 0; |
10290 | CORE_ADDR high = 0; | |
10291 | int ret = 0; | |
c906108c | 10292 | |
91da1414 MW |
10293 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10294 | if (attr_high) | |
af34e669 | 10295 | { |
e142c38c | 10296 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 10297 | if (attr) |
91da1414 MW |
10298 | { |
10299 | low = DW_ADDR (attr); | |
3019eac3 DE |
10300 | if (attr_high->form == DW_FORM_addr |
10301 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10302 | high = DW_ADDR (attr_high); |
10303 | else | |
10304 | high = low + DW_UNSND (attr_high); | |
10305 | } | |
af34e669 DJ |
10306 | else |
10307 | /* Found high w/o low attribute. */ | |
10308 | return 0; | |
10309 | ||
10310 | /* Found consecutive range of addresses. */ | |
10311 | ret = 1; | |
10312 | } | |
c906108c | 10313 | else |
af34e669 | 10314 | { |
e142c38c | 10315 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
10316 | if (attr != NULL) |
10317 | { | |
ab435259 DE |
10318 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
10319 | We take advantage of the fact that DW_AT_ranges does not appear | |
10320 | in DW_TAG_compile_unit of DWO files. */ | |
10321 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
10322 | unsigned int ranges_offset = (DW_UNSND (attr) | |
10323 | + (need_ranges_base | |
10324 | ? cu->ranges_base | |
10325 | : 0)); | |
2e3cf129 | 10326 | |
af34e669 | 10327 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 10328 | .debug_ranges section. */ |
2e3cf129 | 10329 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 10330 | return 0; |
43039443 | 10331 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
10332 | ret = -1; |
10333 | } | |
10334 | } | |
c906108c | 10335 | |
9373cf26 JK |
10336 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
10337 | if (high <= low) | |
c906108c SS |
10338 | return 0; |
10339 | ||
10340 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
10341 | eliminate duplicate copies of functions and vtables and such. | |
10342 | The linker will arbitrarily choose one and discard the others. | |
10343 | The AT_*_pc values for such functions refer to local labels in | |
10344 | these sections. If the section from that file was discarded, the | |
10345 | labels are not in the output, so the relocs get a value of 0. | |
10346 | If this is a discarded function, mark the pc bounds as invalid, | |
10347 | so that GDB will ignore it. */ | |
72dca2f5 | 10348 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
10349 | return 0; |
10350 | ||
10351 | *lowpc = low; | |
96408a79 SA |
10352 | if (highpc) |
10353 | *highpc = high; | |
af34e669 | 10354 | return ret; |
c906108c SS |
10355 | } |
10356 | ||
b084d499 JB |
10357 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
10358 | its low and high PC addresses. Do nothing if these addresses could not | |
10359 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
10360 | and HIGHPC to the high address if greater than HIGHPC. */ | |
10361 | ||
10362 | static void | |
10363 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
10364 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10365 | struct dwarf2_cu *cu) | |
10366 | { | |
10367 | CORE_ADDR low, high; | |
10368 | struct die_info *child = die->child; | |
10369 | ||
d85a05f0 | 10370 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
10371 | { |
10372 | *lowpc = min (*lowpc, low); | |
10373 | *highpc = max (*highpc, high); | |
10374 | } | |
10375 | ||
10376 | /* If the language does not allow nested subprograms (either inside | |
10377 | subprograms or lexical blocks), we're done. */ | |
10378 | if (cu->language != language_ada) | |
10379 | return; | |
6e70227d | 10380 | |
b084d499 JB |
10381 | /* Check all the children of the given DIE. If it contains nested |
10382 | subprograms, then check their pc bounds. Likewise, we need to | |
10383 | check lexical blocks as well, as they may also contain subprogram | |
10384 | definitions. */ | |
10385 | while (child && child->tag) | |
10386 | { | |
10387 | if (child->tag == DW_TAG_subprogram | |
10388 | || child->tag == DW_TAG_lexical_block) | |
10389 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
10390 | child = sibling_die (child); | |
10391 | } | |
10392 | } | |
10393 | ||
fae299cd DC |
10394 | /* Get the low and high pc's represented by the scope DIE, and store |
10395 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
10396 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
10397 | ||
10398 | static void | |
10399 | get_scope_pc_bounds (struct die_info *die, | |
10400 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10401 | struct dwarf2_cu *cu) | |
10402 | { | |
10403 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
10404 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
10405 | CORE_ADDR current_low, current_high; | |
10406 | ||
d85a05f0 | 10407 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
10408 | { |
10409 | best_low = current_low; | |
10410 | best_high = current_high; | |
10411 | } | |
10412 | else | |
10413 | { | |
10414 | struct die_info *child = die->child; | |
10415 | ||
10416 | while (child && child->tag) | |
10417 | { | |
10418 | switch (child->tag) { | |
10419 | case DW_TAG_subprogram: | |
b084d499 | 10420 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
10421 | break; |
10422 | case DW_TAG_namespace: | |
f55ee35c | 10423 | case DW_TAG_module: |
fae299cd DC |
10424 | /* FIXME: carlton/2004-01-16: Should we do this for |
10425 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
10426 | that current GCC's always emit the DIEs corresponding | |
10427 | to definitions of methods of classes as children of a | |
10428 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
10429 | the DIEs giving the declarations, which could be | |
10430 | anywhere). But I don't see any reason why the | |
10431 | standards says that they have to be there. */ | |
10432 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
10433 | ||
10434 | if (current_low != ((CORE_ADDR) -1)) | |
10435 | { | |
10436 | best_low = min (best_low, current_low); | |
10437 | best_high = max (best_high, current_high); | |
10438 | } | |
10439 | break; | |
10440 | default: | |
0963b4bd | 10441 | /* Ignore. */ |
fae299cd DC |
10442 | break; |
10443 | } | |
10444 | ||
10445 | child = sibling_die (child); | |
10446 | } | |
10447 | } | |
10448 | ||
10449 | *lowpc = best_low; | |
10450 | *highpc = best_high; | |
10451 | } | |
10452 | ||
801e3a5b JB |
10453 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
10454 | in DIE. */ | |
380bca97 | 10455 | |
801e3a5b JB |
10456 | static void |
10457 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
10458 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
10459 | { | |
bb5ed363 | 10460 | struct objfile *objfile = cu->objfile; |
801e3a5b | 10461 | struct attribute *attr; |
91da1414 | 10462 | struct attribute *attr_high; |
801e3a5b | 10463 | |
91da1414 MW |
10464 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10465 | if (attr_high) | |
801e3a5b | 10466 | { |
801e3a5b JB |
10467 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
10468 | if (attr) | |
10469 | { | |
10470 | CORE_ADDR low = DW_ADDR (attr); | |
91da1414 | 10471 | CORE_ADDR high; |
3019eac3 DE |
10472 | if (attr_high->form == DW_FORM_addr |
10473 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10474 | high = DW_ADDR (attr_high); |
10475 | else | |
10476 | high = low + DW_UNSND (attr_high); | |
9a619af0 | 10477 | |
801e3a5b JB |
10478 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
10479 | } | |
10480 | } | |
10481 | ||
10482 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
10483 | if (attr) | |
10484 | { | |
bb5ed363 | 10485 | bfd *obfd = objfile->obfd; |
ab435259 DE |
10486 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
10487 | We take advantage of the fact that DW_AT_ranges does not appear | |
10488 | in DW_TAG_compile_unit of DWO files. */ | |
10489 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
10490 | |
10491 | /* The value of the DW_AT_ranges attribute is the offset of the | |
10492 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
10493 | unsigned long offset = (DW_UNSND (attr) |
10494 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d521ce57 | 10495 | const gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
10496 | |
10497 | /* For some target architectures, but not others, the | |
10498 | read_address function sign-extends the addresses it returns. | |
10499 | To recognize base address selection entries, we need a | |
10500 | mask. */ | |
10501 | unsigned int addr_size = cu->header.addr_size; | |
10502 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
10503 | ||
10504 | /* The base address, to which the next pair is relative. Note | |
10505 | that this 'base' is a DWARF concept: most entries in a range | |
10506 | list are relative, to reduce the number of relocs against the | |
10507 | debugging information. This is separate from this function's | |
10508 | 'baseaddr' argument, which GDB uses to relocate debugging | |
10509 | information from a shared library based on the address at | |
10510 | which the library was loaded. */ | |
d00adf39 DE |
10511 | CORE_ADDR base = cu->base_address; |
10512 | int base_known = cu->base_known; | |
801e3a5b | 10513 | |
be391dca | 10514 | gdb_assert (dwarf2_per_objfile->ranges.readin); |
dce234bc | 10515 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
10516 | { |
10517 | complaint (&symfile_complaints, | |
10518 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
10519 | offset); | |
10520 | return; | |
10521 | } | |
10522 | ||
10523 | for (;;) | |
10524 | { | |
10525 | unsigned int bytes_read; | |
10526 | CORE_ADDR start, end; | |
10527 | ||
10528 | start = read_address (obfd, buffer, cu, &bytes_read); | |
10529 | buffer += bytes_read; | |
10530 | end = read_address (obfd, buffer, cu, &bytes_read); | |
10531 | buffer += bytes_read; | |
10532 | ||
10533 | /* Did we find the end of the range list? */ | |
10534 | if (start == 0 && end == 0) | |
10535 | break; | |
10536 | ||
10537 | /* Did we find a base address selection entry? */ | |
10538 | else if ((start & base_select_mask) == base_select_mask) | |
10539 | { | |
10540 | base = end; | |
10541 | base_known = 1; | |
10542 | } | |
10543 | ||
10544 | /* We found an ordinary address range. */ | |
10545 | else | |
10546 | { | |
10547 | if (!base_known) | |
10548 | { | |
10549 | complaint (&symfile_complaints, | |
3e43a32a MS |
10550 | _("Invalid .debug_ranges data " |
10551 | "(no base address)")); | |
801e3a5b JB |
10552 | return; |
10553 | } | |
10554 | ||
9277c30c UW |
10555 | if (start > end) |
10556 | { | |
10557 | /* Inverted range entries are invalid. */ | |
10558 | complaint (&symfile_complaints, | |
10559 | _("Invalid .debug_ranges data " | |
10560 | "(inverted range)")); | |
10561 | return; | |
10562 | } | |
10563 | ||
10564 | /* Empty range entries have no effect. */ | |
10565 | if (start == end) | |
10566 | continue; | |
10567 | ||
01093045 DE |
10568 | start += base + baseaddr; |
10569 | end += base + baseaddr; | |
10570 | ||
10571 | /* A not-uncommon case of bad debug info. | |
10572 | Don't pollute the addrmap with bad data. */ | |
10573 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
10574 | { | |
10575 | complaint (&symfile_complaints, | |
10576 | _(".debug_ranges entry has start address of zero" | |
10577 | " [in module %s]"), objfile->name); | |
10578 | continue; | |
10579 | } | |
10580 | ||
10581 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
10582 | } |
10583 | } | |
10584 | } | |
10585 | } | |
10586 | ||
685b1105 JK |
10587 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
10588 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 10589 | |
685b1105 JK |
10590 | static void |
10591 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
10592 | { |
10593 | const char *cs; | |
10594 | int major, minor, release; | |
10595 | ||
10596 | if (cu->producer == NULL) | |
10597 | { | |
10598 | /* For unknown compilers expect their behavior is DWARF version | |
10599 | compliant. | |
10600 | ||
10601 | GCC started to support .debug_types sections by -gdwarf-4 since | |
10602 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
10603 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
10604 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
10605 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 10606 | } |
685b1105 | 10607 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 10608 | { |
685b1105 JK |
10609 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
10610 | ||
ba919b58 TT |
10611 | cs = &cu->producer[strlen ("GNU ")]; |
10612 | while (*cs && !isdigit (*cs)) | |
10613 | cs++; | |
10614 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
10615 | { | |
10616 | /* Not recognized as GCC. */ | |
10617 | } | |
10618 | else | |
1b80a9fa JK |
10619 | { |
10620 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
10621 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
10622 | } | |
685b1105 JK |
10623 | } |
10624 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
10625 | cu->producer_is_icc = 1; | |
10626 | else | |
10627 | { | |
10628 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
10629 | compliant. */ | |
60d5a603 JK |
10630 | } |
10631 | ||
ba919b58 | 10632 | cu->checked_producer = 1; |
685b1105 | 10633 | } |
ba919b58 | 10634 | |
685b1105 JK |
10635 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
10636 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
10637 | during 4.6.0 experimental. */ | |
10638 | ||
10639 | static int | |
10640 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
10641 | { | |
10642 | if (!cu->checked_producer) | |
10643 | check_producer (cu); | |
10644 | ||
10645 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
10646 | } |
10647 | ||
10648 | /* Return the default accessibility type if it is not overriden by | |
10649 | DW_AT_accessibility. */ | |
10650 | ||
10651 | static enum dwarf_access_attribute | |
10652 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
10653 | { | |
10654 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
10655 | { | |
10656 | /* The default DWARF 2 accessibility for members is public, the default | |
10657 | accessibility for inheritance is private. */ | |
10658 | ||
10659 | if (die->tag != DW_TAG_inheritance) | |
10660 | return DW_ACCESS_public; | |
10661 | else | |
10662 | return DW_ACCESS_private; | |
10663 | } | |
10664 | else | |
10665 | { | |
10666 | /* DWARF 3+ defines the default accessibility a different way. The same | |
10667 | rules apply now for DW_TAG_inheritance as for the members and it only | |
10668 | depends on the container kind. */ | |
10669 | ||
10670 | if (die->parent->tag == DW_TAG_class_type) | |
10671 | return DW_ACCESS_private; | |
10672 | else | |
10673 | return DW_ACCESS_public; | |
10674 | } | |
10675 | } | |
10676 | ||
74ac6d43 TT |
10677 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
10678 | offset. If the attribute was not found return 0, otherwise return | |
10679 | 1. If it was found but could not properly be handled, set *OFFSET | |
10680 | to 0. */ | |
10681 | ||
10682 | static int | |
10683 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
10684 | LONGEST *offset) | |
10685 | { | |
10686 | struct attribute *attr; | |
10687 | ||
10688 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
10689 | if (attr != NULL) | |
10690 | { | |
10691 | *offset = 0; | |
10692 | ||
10693 | /* Note that we do not check for a section offset first here. | |
10694 | This is because DW_AT_data_member_location is new in DWARF 4, | |
10695 | so if we see it, we can assume that a constant form is really | |
10696 | a constant and not a section offset. */ | |
10697 | if (attr_form_is_constant (attr)) | |
10698 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
10699 | else if (attr_form_is_section_offset (attr)) | |
10700 | dwarf2_complex_location_expr_complaint (); | |
10701 | else if (attr_form_is_block (attr)) | |
10702 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
10703 | else | |
10704 | dwarf2_complex_location_expr_complaint (); | |
10705 | ||
10706 | return 1; | |
10707 | } | |
10708 | ||
10709 | return 0; | |
10710 | } | |
10711 | ||
c906108c SS |
10712 | /* Add an aggregate field to the field list. */ |
10713 | ||
10714 | static void | |
107d2387 | 10715 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 10716 | struct dwarf2_cu *cu) |
6e70227d | 10717 | { |
e7c27a73 | 10718 | struct objfile *objfile = cu->objfile; |
5e2b427d | 10719 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
10720 | struct nextfield *new_field; |
10721 | struct attribute *attr; | |
10722 | struct field *fp; | |
15d034d0 | 10723 | const char *fieldname = ""; |
c906108c SS |
10724 | |
10725 | /* Allocate a new field list entry and link it in. */ | |
10726 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 10727 | make_cleanup (xfree, new_field); |
c906108c | 10728 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
10729 | |
10730 | if (die->tag == DW_TAG_inheritance) | |
10731 | { | |
10732 | new_field->next = fip->baseclasses; | |
10733 | fip->baseclasses = new_field; | |
10734 | } | |
10735 | else | |
10736 | { | |
10737 | new_field->next = fip->fields; | |
10738 | fip->fields = new_field; | |
10739 | } | |
c906108c SS |
10740 | fip->nfields++; |
10741 | ||
e142c38c | 10742 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
10743 | if (attr) |
10744 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
10745 | else |
10746 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
10747 | if (new_field->accessibility != DW_ACCESS_public) |
10748 | fip->non_public_fields = 1; | |
60d5a603 | 10749 | |
e142c38c | 10750 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
10751 | if (attr) |
10752 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
10753 | else |
10754 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
10755 | |
10756 | fp = &new_field->field; | |
a9a9bd0f | 10757 | |
e142c38c | 10758 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 10759 | { |
74ac6d43 TT |
10760 | LONGEST offset; |
10761 | ||
a9a9bd0f | 10762 | /* Data member other than a C++ static data member. */ |
6e70227d | 10763 | |
c906108c | 10764 | /* Get type of field. */ |
e7c27a73 | 10765 | fp->type = die_type (die, cu); |
c906108c | 10766 | |
d6a843b5 | 10767 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 10768 | |
c906108c | 10769 | /* Get bit size of field (zero if none). */ |
e142c38c | 10770 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
10771 | if (attr) |
10772 | { | |
10773 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
10774 | } | |
10775 | else | |
10776 | { | |
10777 | FIELD_BITSIZE (*fp) = 0; | |
10778 | } | |
10779 | ||
10780 | /* Get bit offset of field. */ | |
74ac6d43 TT |
10781 | if (handle_data_member_location (die, cu, &offset)) |
10782 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 10783 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
10784 | if (attr) |
10785 | { | |
5e2b427d | 10786 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
10787 | { |
10788 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
10789 | additional bit offset from the MSB of the containing |
10790 | anonymous object to the MSB of the field. We don't | |
10791 | have to do anything special since we don't need to | |
10792 | know the size of the anonymous object. */ | |
f41f5e61 | 10793 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
10794 | } |
10795 | else | |
10796 | { | |
10797 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
10798 | MSB of the anonymous object, subtract off the number of |
10799 | bits from the MSB of the field to the MSB of the | |
10800 | object, and then subtract off the number of bits of | |
10801 | the field itself. The result is the bit offset of | |
10802 | the LSB of the field. */ | |
c906108c SS |
10803 | int anonymous_size; |
10804 | int bit_offset = DW_UNSND (attr); | |
10805 | ||
e142c38c | 10806 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
10807 | if (attr) |
10808 | { | |
10809 | /* The size of the anonymous object containing | |
10810 | the bit field is explicit, so use the | |
10811 | indicated size (in bytes). */ | |
10812 | anonymous_size = DW_UNSND (attr); | |
10813 | } | |
10814 | else | |
10815 | { | |
10816 | /* The size of the anonymous object containing | |
10817 | the bit field must be inferred from the type | |
10818 | attribute of the data member containing the | |
10819 | bit field. */ | |
10820 | anonymous_size = TYPE_LENGTH (fp->type); | |
10821 | } | |
f41f5e61 PA |
10822 | SET_FIELD_BITPOS (*fp, |
10823 | (FIELD_BITPOS (*fp) | |
10824 | + anonymous_size * bits_per_byte | |
10825 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
10826 | } |
10827 | } | |
10828 | ||
10829 | /* Get name of field. */ | |
39cbfefa DJ |
10830 | fieldname = dwarf2_name (die, cu); |
10831 | if (fieldname == NULL) | |
10832 | fieldname = ""; | |
d8151005 DJ |
10833 | |
10834 | /* The name is already allocated along with this objfile, so we don't | |
10835 | need to duplicate it for the type. */ | |
10836 | fp->name = fieldname; | |
c906108c SS |
10837 | |
10838 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 10839 | pointer or virtual base class pointer) to private. */ |
e142c38c | 10840 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 10841 | { |
d48cc9dd | 10842 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
10843 | new_field->accessibility = DW_ACCESS_private; |
10844 | fip->non_public_fields = 1; | |
10845 | } | |
10846 | } | |
a9a9bd0f | 10847 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 10848 | { |
a9a9bd0f DC |
10849 | /* C++ static member. */ |
10850 | ||
10851 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
10852 | is a declaration, but all versions of G++ as of this writing | |
10853 | (so through at least 3.2.1) incorrectly generate | |
10854 | DW_TAG_variable tags. */ | |
6e70227d | 10855 | |
ff355380 | 10856 | const char *physname; |
c906108c | 10857 | |
a9a9bd0f | 10858 | /* Get name of field. */ |
39cbfefa DJ |
10859 | fieldname = dwarf2_name (die, cu); |
10860 | if (fieldname == NULL) | |
c906108c SS |
10861 | return; |
10862 | ||
254e6b9e | 10863 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
10864 | if (attr |
10865 | /* Only create a symbol if this is an external value. | |
10866 | new_symbol checks this and puts the value in the global symbol | |
10867 | table, which we want. If it is not external, new_symbol | |
10868 | will try to put the value in cu->list_in_scope which is wrong. */ | |
10869 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
10870 | { |
10871 | /* A static const member, not much different than an enum as far as | |
10872 | we're concerned, except that we can support more types. */ | |
10873 | new_symbol (die, NULL, cu); | |
10874 | } | |
10875 | ||
2df3850c | 10876 | /* Get physical name. */ |
ff355380 | 10877 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 10878 | |
d8151005 DJ |
10879 | /* The name is already allocated along with this objfile, so we don't |
10880 | need to duplicate it for the type. */ | |
10881 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 10882 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 10883 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
10884 | } |
10885 | else if (die->tag == DW_TAG_inheritance) | |
10886 | { | |
74ac6d43 | 10887 | LONGEST offset; |
d4b96c9a | 10888 | |
74ac6d43 TT |
10889 | /* C++ base class field. */ |
10890 | if (handle_data_member_location (die, cu, &offset)) | |
10891 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 10892 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 10893 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
10894 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
10895 | fip->nbaseclasses++; | |
10896 | } | |
10897 | } | |
10898 | ||
98751a41 JK |
10899 | /* Add a typedef defined in the scope of the FIP's class. */ |
10900 | ||
10901 | static void | |
10902 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
10903 | struct dwarf2_cu *cu) | |
6e70227d | 10904 | { |
98751a41 | 10905 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
10906 | struct typedef_field_list *new_field; |
10907 | struct attribute *attr; | |
10908 | struct typedef_field *fp; | |
10909 | char *fieldname = ""; | |
10910 | ||
10911 | /* Allocate a new field list entry and link it in. */ | |
10912 | new_field = xzalloc (sizeof (*new_field)); | |
10913 | make_cleanup (xfree, new_field); | |
10914 | ||
10915 | gdb_assert (die->tag == DW_TAG_typedef); | |
10916 | ||
10917 | fp = &new_field->field; | |
10918 | ||
10919 | /* Get name of field. */ | |
10920 | fp->name = dwarf2_name (die, cu); | |
10921 | if (fp->name == NULL) | |
10922 | return; | |
10923 | ||
10924 | fp->type = read_type_die (die, cu); | |
10925 | ||
10926 | new_field->next = fip->typedef_field_list; | |
10927 | fip->typedef_field_list = new_field; | |
10928 | fip->typedef_field_list_count++; | |
10929 | } | |
10930 | ||
c906108c SS |
10931 | /* Create the vector of fields, and attach it to the type. */ |
10932 | ||
10933 | static void | |
fba45db2 | 10934 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 10935 | struct dwarf2_cu *cu) |
c906108c SS |
10936 | { |
10937 | int nfields = fip->nfields; | |
10938 | ||
10939 | /* Record the field count, allocate space for the array of fields, | |
10940 | and create blank accessibility bitfields if necessary. */ | |
10941 | TYPE_NFIELDS (type) = nfields; | |
10942 | TYPE_FIELDS (type) = (struct field *) | |
10943 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
10944 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
10945 | ||
b4ba55a1 | 10946 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
10947 | { |
10948 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
10949 | ||
10950 | TYPE_FIELD_PRIVATE_BITS (type) = | |
10951 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10952 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
10953 | ||
10954 | TYPE_FIELD_PROTECTED_BITS (type) = | |
10955 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10956 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
10957 | ||
774b6a14 TT |
10958 | TYPE_FIELD_IGNORE_BITS (type) = |
10959 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10960 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
10961 | } |
10962 | ||
10963 | /* If the type has baseclasses, allocate and clear a bit vector for | |
10964 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 10965 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
10966 | { |
10967 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 10968 | unsigned char *pointer; |
c906108c SS |
10969 | |
10970 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
10971 | pointer = TYPE_ALLOC (type, num_bytes); |
10972 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
10973 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
10974 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
10975 | } | |
10976 | ||
3e43a32a MS |
10977 | /* Copy the saved-up fields into the field vector. Start from the head of |
10978 | the list, adding to the tail of the field array, so that they end up in | |
10979 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
10980 | while (nfields-- > 0) |
10981 | { | |
7d0ccb61 DJ |
10982 | struct nextfield *fieldp; |
10983 | ||
10984 | if (fip->fields) | |
10985 | { | |
10986 | fieldp = fip->fields; | |
10987 | fip->fields = fieldp->next; | |
10988 | } | |
10989 | else | |
10990 | { | |
10991 | fieldp = fip->baseclasses; | |
10992 | fip->baseclasses = fieldp->next; | |
10993 | } | |
10994 | ||
10995 | TYPE_FIELD (type, nfields) = fieldp->field; | |
10996 | switch (fieldp->accessibility) | |
c906108c | 10997 | { |
c5aa993b | 10998 | case DW_ACCESS_private: |
b4ba55a1 JB |
10999 | if (cu->language != language_ada) |
11000 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 11001 | break; |
c906108c | 11002 | |
c5aa993b | 11003 | case DW_ACCESS_protected: |
b4ba55a1 JB |
11004 | if (cu->language != language_ada) |
11005 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 11006 | break; |
c906108c | 11007 | |
c5aa993b JM |
11008 | case DW_ACCESS_public: |
11009 | break; | |
c906108c | 11010 | |
c5aa993b JM |
11011 | default: |
11012 | /* Unknown accessibility. Complain and treat it as public. */ | |
11013 | { | |
e2e0b3e5 | 11014 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 11015 | fieldp->accessibility); |
c5aa993b JM |
11016 | } |
11017 | break; | |
c906108c SS |
11018 | } |
11019 | if (nfields < fip->nbaseclasses) | |
11020 | { | |
7d0ccb61 | 11021 | switch (fieldp->virtuality) |
c906108c | 11022 | { |
c5aa993b JM |
11023 | case DW_VIRTUALITY_virtual: |
11024 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 11025 | if (cu->language == language_ada) |
a73c6dcd | 11026 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
11027 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
11028 | break; | |
c906108c SS |
11029 | } |
11030 | } | |
c906108c SS |
11031 | } |
11032 | } | |
11033 | ||
7d27a96d TT |
11034 | /* Return true if this member function is a constructor, false |
11035 | otherwise. */ | |
11036 | ||
11037 | static int | |
11038 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
11039 | { | |
11040 | const char *fieldname; | |
11041 | const char *typename; | |
11042 | int len; | |
11043 | ||
11044 | if (die->parent == NULL) | |
11045 | return 0; | |
11046 | ||
11047 | if (die->parent->tag != DW_TAG_structure_type | |
11048 | && die->parent->tag != DW_TAG_union_type | |
11049 | && die->parent->tag != DW_TAG_class_type) | |
11050 | return 0; | |
11051 | ||
11052 | fieldname = dwarf2_name (die, cu); | |
11053 | typename = dwarf2_name (die->parent, cu); | |
11054 | if (fieldname == NULL || typename == NULL) | |
11055 | return 0; | |
11056 | ||
11057 | len = strlen (fieldname); | |
11058 | return (strncmp (fieldname, typename, len) == 0 | |
11059 | && (typename[len] == '\0' || typename[len] == '<')); | |
11060 | } | |
11061 | ||
c906108c SS |
11062 | /* Add a member function to the proper fieldlist. */ |
11063 | ||
11064 | static void | |
107d2387 | 11065 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 11066 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 11067 | { |
e7c27a73 | 11068 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11069 | struct attribute *attr; |
11070 | struct fnfieldlist *flp; | |
11071 | int i; | |
11072 | struct fn_field *fnp; | |
15d034d0 | 11073 | const char *fieldname; |
c906108c | 11074 | struct nextfnfield *new_fnfield; |
f792889a | 11075 | struct type *this_type; |
60d5a603 | 11076 | enum dwarf_access_attribute accessibility; |
c906108c | 11077 | |
b4ba55a1 | 11078 | if (cu->language == language_ada) |
a73c6dcd | 11079 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 11080 | |
2df3850c | 11081 | /* Get name of member function. */ |
39cbfefa DJ |
11082 | fieldname = dwarf2_name (die, cu); |
11083 | if (fieldname == NULL) | |
2df3850c | 11084 | return; |
c906108c | 11085 | |
c906108c SS |
11086 | /* Look up member function name in fieldlist. */ |
11087 | for (i = 0; i < fip->nfnfields; i++) | |
11088 | { | |
27bfe10e | 11089 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
11090 | break; |
11091 | } | |
11092 | ||
11093 | /* Create new list element if necessary. */ | |
11094 | if (i < fip->nfnfields) | |
11095 | flp = &fip->fnfieldlists[i]; | |
11096 | else | |
11097 | { | |
11098 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
11099 | { | |
11100 | fip->fnfieldlists = (struct fnfieldlist *) | |
11101 | xrealloc (fip->fnfieldlists, | |
11102 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 11103 | * sizeof (struct fnfieldlist)); |
c906108c | 11104 | if (fip->nfnfields == 0) |
c13c43fd | 11105 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
11106 | } |
11107 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
11108 | flp->name = fieldname; | |
11109 | flp->length = 0; | |
11110 | flp->head = NULL; | |
3da10d80 | 11111 | i = fip->nfnfields++; |
c906108c SS |
11112 | } |
11113 | ||
11114 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 11115 | entry. */ |
c906108c | 11116 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 11117 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
11118 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
11119 | new_fnfield->next = flp->head; | |
11120 | flp->head = new_fnfield; | |
11121 | flp->length++; | |
11122 | ||
11123 | /* Fill in the member function field info. */ | |
11124 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
11125 | |
11126 | /* Delay processing of the physname until later. */ | |
11127 | if (cu->language == language_cplus || cu->language == language_java) | |
11128 | { | |
11129 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
11130 | die, cu); | |
11131 | } | |
11132 | else | |
11133 | { | |
1d06ead6 | 11134 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
11135 | fnp->physname = physname ? physname : ""; |
11136 | } | |
11137 | ||
c906108c | 11138 | fnp->type = alloc_type (objfile); |
f792889a DJ |
11139 | this_type = read_type_die (die, cu); |
11140 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 11141 | { |
f792889a | 11142 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 11143 | |
f792889a | 11144 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
11145 | of the method itself (TYPE_CODE_METHOD). */ |
11146 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
11147 | TYPE_TARGET_TYPE (this_type), |
11148 | TYPE_FIELDS (this_type), | |
11149 | TYPE_NFIELDS (this_type), | |
11150 | TYPE_VARARGS (this_type)); | |
c906108c SS |
11151 | |
11152 | /* Handle static member functions. | |
c5aa993b | 11153 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
11154 | member functions. G++ helps GDB by marking the first |
11155 | parameter for non-static member functions (which is the this | |
11156 | pointer) as artificial. We obtain this information from | |
11157 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 11158 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
11159 | fnp->voffset = VOFFSET_STATIC; |
11160 | } | |
11161 | else | |
e2e0b3e5 | 11162 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 11163 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
11164 | |
11165 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 11166 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 11167 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 11168 | |
3e43a32a MS |
11169 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
11170 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
11171 | |
11172 | /* Get accessibility. */ | |
e142c38c | 11173 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 11174 | if (attr) |
60d5a603 JK |
11175 | accessibility = DW_UNSND (attr); |
11176 | else | |
11177 | accessibility = dwarf2_default_access_attribute (die, cu); | |
11178 | switch (accessibility) | |
c906108c | 11179 | { |
60d5a603 JK |
11180 | case DW_ACCESS_private: |
11181 | fnp->is_private = 1; | |
11182 | break; | |
11183 | case DW_ACCESS_protected: | |
11184 | fnp->is_protected = 1; | |
11185 | break; | |
c906108c SS |
11186 | } |
11187 | ||
b02dede2 | 11188 | /* Check for artificial methods. */ |
e142c38c | 11189 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
11190 | if (attr && DW_UNSND (attr) != 0) |
11191 | fnp->is_artificial = 1; | |
11192 | ||
7d27a96d TT |
11193 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
11194 | ||
0d564a31 | 11195 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
11196 | function. For older versions of GCC, this is an offset in the |
11197 | appropriate virtual table, as specified by DW_AT_containing_type. | |
11198 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
11199 | to the object address. */ |
11200 | ||
e142c38c | 11201 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 11202 | if (attr) |
8e19ed76 | 11203 | { |
aec5aa8b | 11204 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 11205 | { |
aec5aa8b TT |
11206 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
11207 | { | |
11208 | /* Old-style GCC. */ | |
11209 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
11210 | } | |
11211 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
11212 | || (DW_BLOCK (attr)->size > 1 | |
11213 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
11214 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
11215 | { | |
11216 | struct dwarf_block blk; | |
11217 | int offset; | |
11218 | ||
11219 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
11220 | ? 1 : 2); | |
11221 | blk.size = DW_BLOCK (attr)->size - offset; | |
11222 | blk.data = DW_BLOCK (attr)->data + offset; | |
11223 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
11224 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
11225 | dwarf2_complex_location_expr_complaint (); | |
11226 | else | |
11227 | fnp->voffset /= cu->header.addr_size; | |
11228 | fnp->voffset += 2; | |
11229 | } | |
11230 | else | |
11231 | dwarf2_complex_location_expr_complaint (); | |
11232 | ||
11233 | if (!fnp->fcontext) | |
11234 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
11235 | } | |
3690dd37 | 11236 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 11237 | { |
4d3c2250 | 11238 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
11239 | } |
11240 | else | |
11241 | { | |
4d3c2250 KB |
11242 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
11243 | fieldname); | |
8e19ed76 | 11244 | } |
0d564a31 | 11245 | } |
d48cc9dd DJ |
11246 | else |
11247 | { | |
11248 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
11249 | if (attr && DW_UNSND (attr)) | |
11250 | { | |
11251 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
11252 | complaint (&symfile_complaints, | |
3e43a32a MS |
11253 | _("Member function \"%s\" (offset %d) is virtual " |
11254 | "but the vtable offset is not specified"), | |
b64f50a1 | 11255 | fieldname, die->offset.sect_off); |
9655fd1a | 11256 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
11257 | TYPE_CPLUS_DYNAMIC (type) = 1; |
11258 | } | |
11259 | } | |
c906108c SS |
11260 | } |
11261 | ||
11262 | /* Create the vector of member function fields, and attach it to the type. */ | |
11263 | ||
11264 | static void | |
fba45db2 | 11265 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 11266 | struct dwarf2_cu *cu) |
c906108c SS |
11267 | { |
11268 | struct fnfieldlist *flp; | |
c906108c SS |
11269 | int i; |
11270 | ||
b4ba55a1 | 11271 | if (cu->language == language_ada) |
a73c6dcd | 11272 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 11273 | |
c906108c SS |
11274 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
11275 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
11276 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
11277 | ||
11278 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
11279 | { | |
11280 | struct nextfnfield *nfp = flp->head; | |
11281 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
11282 | int k; | |
11283 | ||
11284 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
11285 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
11286 | fn_flp->fn_fields = (struct fn_field *) | |
11287 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
11288 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 11289 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
11290 | } |
11291 | ||
11292 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
11293 | } |
11294 | ||
1168df01 JB |
11295 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
11296 | language, zero otherwise. */ | |
11297 | static int | |
11298 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
11299 | { | |
11300 | static const char vptr[] = "_vptr"; | |
987504bb | 11301 | static const char vtable[] = "vtable"; |
1168df01 | 11302 | |
987504bb JJ |
11303 | /* Look for the C++ and Java forms of the vtable. */ |
11304 | if ((cu->language == language_java | |
11305 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
11306 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
11307 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
11308 | return 1; |
11309 | ||
11310 | return 0; | |
11311 | } | |
11312 | ||
c0dd20ea | 11313 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
11314 | functions, with the ABI-specified layout. If TYPE describes |
11315 | such a structure, smash it into a member function type. | |
61049d3b DJ |
11316 | |
11317 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
11318 | This is GCC PR debug/28767. */ | |
c0dd20ea | 11319 | |
0b92b5bb TT |
11320 | static void |
11321 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 11322 | { |
0b92b5bb | 11323 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
11324 | |
11325 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
11326 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
11327 | return; | |
c0dd20ea DJ |
11328 | |
11329 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
11330 | if (TYPE_FIELD_NAME (type, 0) == NULL |
11331 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
11332 | || TYPE_FIELD_NAME (type, 1) == NULL | |
11333 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
11334 | return; | |
c0dd20ea DJ |
11335 | |
11336 | /* Find the type of the method. */ | |
0b92b5bb | 11337 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
11338 | if (pfn_type == NULL |
11339 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
11340 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 11341 | return; |
c0dd20ea DJ |
11342 | |
11343 | /* Look for the "this" argument. */ | |
11344 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
11345 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 11346 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 11347 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 11348 | return; |
c0dd20ea DJ |
11349 | |
11350 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
11351 | new_type = alloc_type (objfile); |
11352 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
11353 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
11354 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 11355 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 11356 | } |
1168df01 | 11357 | |
685b1105 JK |
11358 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
11359 | (icc). */ | |
11360 | ||
11361 | static int | |
11362 | producer_is_icc (struct dwarf2_cu *cu) | |
11363 | { | |
11364 | if (!cu->checked_producer) | |
11365 | check_producer (cu); | |
11366 | ||
11367 | return cu->producer_is_icc; | |
11368 | } | |
11369 | ||
c906108c | 11370 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
11371 | (definition) to create a type for the structure or union. Fill in |
11372 | the type's name and general properties; the members will not be | |
3d1d5ea3 | 11373 | processed until process_structure_scope. |
c906108c | 11374 | |
c767944b DJ |
11375 | NOTE: we need to call these functions regardless of whether or not the |
11376 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c SS |
11377 | structure or union. This gets the type entered into our set of |
11378 | user defined types. | |
11379 | ||
11380 | However, if the structure is incomplete (an opaque struct/union) | |
11381 | then suppress creating a symbol table entry for it since gdb only | |
11382 | wants to find the one with the complete definition. Note that if | |
11383 | it is complete, we just call new_symbol, which does it's own | |
11384 | checking about whether the struct/union is anonymous or not (and | |
11385 | suppresses creating a symbol table entry itself). */ | |
11386 | ||
f792889a | 11387 | static struct type * |
134d01f1 | 11388 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11389 | { |
e7c27a73 | 11390 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11391 | struct type *type; |
11392 | struct attribute *attr; | |
15d034d0 | 11393 | const char *name; |
c906108c | 11394 | |
348e048f DE |
11395 | /* If the definition of this type lives in .debug_types, read that type. |
11396 | Don't follow DW_AT_specification though, that will take us back up | |
11397 | the chain and we want to go down. */ | |
45e58e77 | 11398 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11399 | if (attr) |
11400 | { | |
ac9ec31b | 11401 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 11402 | |
ac9ec31b | 11403 | /* The type's CU may not be the same as CU. |
02142a6c | 11404 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
11405 | return set_die_type (die, type, cu); |
11406 | } | |
11407 | ||
c0dd20ea | 11408 | type = alloc_type (objfile); |
c906108c | 11409 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 11410 | |
39cbfefa DJ |
11411 | name = dwarf2_name (die, cu); |
11412 | if (name != NULL) | |
c906108c | 11413 | { |
987504bb JJ |
11414 | if (cu->language == language_cplus |
11415 | || cu->language == language_java) | |
63d06c5c | 11416 | { |
15d034d0 | 11417 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
11418 | |
11419 | /* dwarf2_full_name might have already finished building the DIE's | |
11420 | type. If so, there is no need to continue. */ | |
11421 | if (get_die_type (die, cu) != NULL) | |
11422 | return get_die_type (die, cu); | |
11423 | ||
11424 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
11425 | if (die->tag == DW_TAG_structure_type |
11426 | || die->tag == DW_TAG_class_type) | |
11427 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
11428 | } |
11429 | else | |
11430 | { | |
d8151005 DJ |
11431 | /* The name is already allocated along with this objfile, so |
11432 | we don't need to duplicate it for the type. */ | |
7d455152 | 11433 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
11434 | if (die->tag == DW_TAG_class_type) |
11435 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 11436 | } |
c906108c SS |
11437 | } |
11438 | ||
11439 | if (die->tag == DW_TAG_structure_type) | |
11440 | { | |
11441 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
11442 | } | |
11443 | else if (die->tag == DW_TAG_union_type) | |
11444 | { | |
11445 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
11446 | } | |
11447 | else | |
11448 | { | |
c906108c SS |
11449 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
11450 | } | |
11451 | ||
0cc2414c TT |
11452 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
11453 | TYPE_DECLARED_CLASS (type) = 1; | |
11454 | ||
e142c38c | 11455 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11456 | if (attr) |
11457 | { | |
11458 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11459 | } | |
11460 | else | |
11461 | { | |
11462 | TYPE_LENGTH (type) = 0; | |
11463 | } | |
11464 | ||
685b1105 JK |
11465 | if (producer_is_icc (cu)) |
11466 | { | |
11467 | /* ICC does not output the required DW_AT_declaration | |
11468 | on incomplete types, but gives them a size of zero. */ | |
11469 | } | |
11470 | else | |
11471 | TYPE_STUB_SUPPORTED (type) = 1; | |
11472 | ||
dc718098 | 11473 | if (die_is_declaration (die, cu)) |
876cecd0 | 11474 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
11475 | else if (attr == NULL && die->child == NULL |
11476 | && producer_is_realview (cu->producer)) | |
11477 | /* RealView does not output the required DW_AT_declaration | |
11478 | on incomplete types. */ | |
11479 | TYPE_STUB (type) = 1; | |
dc718098 | 11480 | |
c906108c SS |
11481 | /* We need to add the type field to the die immediately so we don't |
11482 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 11483 | type within the structure itself. */ |
1c379e20 | 11484 | set_die_type (die, type, cu); |
c906108c | 11485 | |
7e314c57 JK |
11486 | /* set_die_type should be already done. */ |
11487 | set_descriptive_type (type, die, cu); | |
11488 | ||
c767944b DJ |
11489 | return type; |
11490 | } | |
11491 | ||
11492 | /* Finish creating a structure or union type, including filling in | |
11493 | its members and creating a symbol for it. */ | |
11494 | ||
11495 | static void | |
11496 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11497 | { | |
11498 | struct objfile *objfile = cu->objfile; | |
11499 | struct die_info *child_die = die->child; | |
11500 | struct type *type; | |
11501 | ||
11502 | type = get_die_type (die, cu); | |
11503 | if (type == NULL) | |
11504 | type = read_structure_type (die, cu); | |
11505 | ||
e142c38c | 11506 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
11507 | { |
11508 | struct field_info fi; | |
11509 | struct die_info *child_die; | |
34eaf542 | 11510 | VEC (symbolp) *template_args = NULL; |
c767944b | 11511 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
11512 | |
11513 | memset (&fi, 0, sizeof (struct field_info)); | |
11514 | ||
639d11d3 | 11515 | child_die = die->child; |
c906108c SS |
11516 | |
11517 | while (child_die && child_die->tag) | |
11518 | { | |
a9a9bd0f DC |
11519 | if (child_die->tag == DW_TAG_member |
11520 | || child_die->tag == DW_TAG_variable) | |
c906108c | 11521 | { |
a9a9bd0f DC |
11522 | /* NOTE: carlton/2002-11-05: A C++ static data member |
11523 | should be a DW_TAG_member that is a declaration, but | |
11524 | all versions of G++ as of this writing (so through at | |
11525 | least 3.2.1) incorrectly generate DW_TAG_variable | |
11526 | tags for them instead. */ | |
e7c27a73 | 11527 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11528 | } |
8713b1b1 | 11529 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 11530 | { |
0963b4bd | 11531 | /* C++ member function. */ |
e7c27a73 | 11532 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
11533 | } |
11534 | else if (child_die->tag == DW_TAG_inheritance) | |
11535 | { | |
11536 | /* C++ base class field. */ | |
e7c27a73 | 11537 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11538 | } |
98751a41 JK |
11539 | else if (child_die->tag == DW_TAG_typedef) |
11540 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
11541 | else if (child_die->tag == DW_TAG_template_type_param |
11542 | || child_die->tag == DW_TAG_template_value_param) | |
11543 | { | |
11544 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11545 | ||
f1078f66 DJ |
11546 | if (arg != NULL) |
11547 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11548 | } |
11549 | ||
c906108c SS |
11550 | child_die = sibling_die (child_die); |
11551 | } | |
11552 | ||
34eaf542 TT |
11553 | /* Attach template arguments to type. */ |
11554 | if (! VEC_empty (symbolp, template_args)) | |
11555 | { | |
11556 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
11557 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11558 | = VEC_length (symbolp, template_args); | |
11559 | TYPE_TEMPLATE_ARGUMENTS (type) | |
11560 | = obstack_alloc (&objfile->objfile_obstack, | |
11561 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11562 | * sizeof (struct symbol *))); | |
11563 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
11564 | VEC_address (symbolp, template_args), | |
11565 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11566 | * sizeof (struct symbol *))); | |
11567 | VEC_free (symbolp, template_args); | |
11568 | } | |
11569 | ||
c906108c SS |
11570 | /* Attach fields and member functions to the type. */ |
11571 | if (fi.nfields) | |
e7c27a73 | 11572 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
11573 | if (fi.nfnfields) |
11574 | { | |
e7c27a73 | 11575 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 11576 | |
c5aa993b | 11577 | /* Get the type which refers to the base class (possibly this |
c906108c | 11578 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
11579 | class from the DW_AT_containing_type attribute. This use of |
11580 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 11581 | |
e142c38c | 11582 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 11583 | { |
e7c27a73 | 11584 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
11585 | |
11586 | TYPE_VPTR_BASETYPE (type) = t; | |
11587 | if (type == t) | |
11588 | { | |
c906108c SS |
11589 | int i; |
11590 | ||
11591 | /* Our own class provides vtbl ptr. */ | |
11592 | for (i = TYPE_NFIELDS (t) - 1; | |
11593 | i >= TYPE_N_BASECLASSES (t); | |
11594 | --i) | |
11595 | { | |
0d5cff50 | 11596 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 11597 | |
1168df01 | 11598 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
11599 | { |
11600 | TYPE_VPTR_FIELDNO (type) = i; | |
11601 | break; | |
11602 | } | |
11603 | } | |
11604 | ||
11605 | /* Complain if virtual function table field not found. */ | |
11606 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 11607 | complaint (&symfile_complaints, |
3e43a32a MS |
11608 | _("virtual function table pointer " |
11609 | "not found when defining class '%s'"), | |
4d3c2250 KB |
11610 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
11611 | ""); | |
c906108c SS |
11612 | } |
11613 | else | |
11614 | { | |
11615 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
11616 | } | |
11617 | } | |
f6235d4c EZ |
11618 | else if (cu->producer |
11619 | && strncmp (cu->producer, | |
11620 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
11621 | { | |
11622 | /* The IBM XLC compiler does not provide direct indication | |
11623 | of the containing type, but the vtable pointer is | |
11624 | always named __vfp. */ | |
11625 | ||
11626 | int i; | |
11627 | ||
11628 | for (i = TYPE_NFIELDS (type) - 1; | |
11629 | i >= TYPE_N_BASECLASSES (type); | |
11630 | --i) | |
11631 | { | |
11632 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
11633 | { | |
11634 | TYPE_VPTR_FIELDNO (type) = i; | |
11635 | TYPE_VPTR_BASETYPE (type) = type; | |
11636 | break; | |
11637 | } | |
11638 | } | |
11639 | } | |
c906108c | 11640 | } |
98751a41 JK |
11641 | |
11642 | /* Copy fi.typedef_field_list linked list elements content into the | |
11643 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
11644 | if (fi.typedef_field_list) | |
11645 | { | |
11646 | int i = fi.typedef_field_list_count; | |
11647 | ||
a0d7a4ff | 11648 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
11649 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
11650 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
11651 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
11652 | ||
11653 | /* Reverse the list order to keep the debug info elements order. */ | |
11654 | while (--i >= 0) | |
11655 | { | |
11656 | struct typedef_field *dest, *src; | |
6e70227d | 11657 | |
98751a41 JK |
11658 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
11659 | src = &fi.typedef_field_list->field; | |
11660 | fi.typedef_field_list = fi.typedef_field_list->next; | |
11661 | *dest = *src; | |
11662 | } | |
11663 | } | |
c767944b DJ |
11664 | |
11665 | do_cleanups (back_to); | |
eb2a6f42 TT |
11666 | |
11667 | if (HAVE_CPLUS_STRUCT (type)) | |
11668 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 11669 | } |
63d06c5c | 11670 | |
bb5ed363 | 11671 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 11672 | |
90aeadfc DC |
11673 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
11674 | snapshots) has been known to create a die giving a declaration | |
11675 | for a class that has, as a child, a die giving a definition for a | |
11676 | nested class. So we have to process our children even if the | |
11677 | current die is a declaration. Normally, of course, a declaration | |
11678 | won't have any children at all. */ | |
134d01f1 | 11679 | |
90aeadfc DC |
11680 | while (child_die != NULL && child_die->tag) |
11681 | { | |
11682 | if (child_die->tag == DW_TAG_member | |
11683 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
11684 | || child_die->tag == DW_TAG_inheritance |
11685 | || child_die->tag == DW_TAG_template_value_param | |
11686 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 11687 | { |
90aeadfc | 11688 | /* Do nothing. */ |
134d01f1 | 11689 | } |
90aeadfc DC |
11690 | else |
11691 | process_die (child_die, cu); | |
134d01f1 | 11692 | |
90aeadfc | 11693 | child_die = sibling_die (child_die); |
134d01f1 DJ |
11694 | } |
11695 | ||
fa4028e9 JB |
11696 | /* Do not consider external references. According to the DWARF standard, |
11697 | these DIEs are identified by the fact that they have no byte_size | |
11698 | attribute, and a declaration attribute. */ | |
11699 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
11700 | || !die_is_declaration (die, cu)) | |
c767944b | 11701 | new_symbol (die, type, cu); |
134d01f1 DJ |
11702 | } |
11703 | ||
11704 | /* Given a DW_AT_enumeration_type die, set its type. We do not | |
11705 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 11706 | |
f792889a | 11707 | static struct type * |
134d01f1 | 11708 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11709 | { |
e7c27a73 | 11710 | struct objfile *objfile = cu->objfile; |
c906108c | 11711 | struct type *type; |
c906108c | 11712 | struct attribute *attr; |
0114d602 | 11713 | const char *name; |
134d01f1 | 11714 | |
348e048f DE |
11715 | /* If the definition of this type lives in .debug_types, read that type. |
11716 | Don't follow DW_AT_specification though, that will take us back up | |
11717 | the chain and we want to go down. */ | |
45e58e77 | 11718 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11719 | if (attr) |
11720 | { | |
ac9ec31b | 11721 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 11722 | |
ac9ec31b | 11723 | /* The type's CU may not be the same as CU. |
02142a6c | 11724 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
11725 | return set_die_type (die, type, cu); |
11726 | } | |
11727 | ||
c906108c SS |
11728 | type = alloc_type (objfile); |
11729 | ||
11730 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 11731 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 11732 | if (name != NULL) |
7d455152 | 11733 | TYPE_TAG_NAME (type) = name; |
c906108c | 11734 | |
e142c38c | 11735 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11736 | if (attr) |
11737 | { | |
11738 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11739 | } | |
11740 | else | |
11741 | { | |
11742 | TYPE_LENGTH (type) = 0; | |
11743 | } | |
11744 | ||
137033e9 JB |
11745 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
11746 | declared as private in the package spec, and then defined only | |
11747 | inside the package body. Such types are known as Taft Amendment | |
11748 | Types. When another package uses such a type, an incomplete DIE | |
11749 | may be generated by the compiler. */ | |
02eb380e | 11750 | if (die_is_declaration (die, cu)) |
876cecd0 | 11751 | TYPE_STUB (type) = 1; |
02eb380e | 11752 | |
f792889a | 11753 | return set_die_type (die, type, cu); |
134d01f1 DJ |
11754 | } |
11755 | ||
11756 | /* Given a pointer to a die which begins an enumeration, process all | |
11757 | the dies that define the members of the enumeration, and create the | |
11758 | symbol for the enumeration type. | |
11759 | ||
11760 | NOTE: We reverse the order of the element list. */ | |
11761 | ||
11762 | static void | |
11763 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11764 | { | |
f792889a | 11765 | struct type *this_type; |
134d01f1 | 11766 | |
f792889a DJ |
11767 | this_type = get_die_type (die, cu); |
11768 | if (this_type == NULL) | |
11769 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 11770 | |
639d11d3 | 11771 | if (die->child != NULL) |
c906108c | 11772 | { |
9dc481d3 DE |
11773 | struct die_info *child_die; |
11774 | struct symbol *sym; | |
11775 | struct field *fields = NULL; | |
11776 | int num_fields = 0; | |
11777 | int unsigned_enum = 1; | |
15d034d0 | 11778 | const char *name; |
cafec441 TT |
11779 | int flag_enum = 1; |
11780 | ULONGEST mask = 0; | |
9dc481d3 | 11781 | |
639d11d3 | 11782 | child_die = die->child; |
c906108c SS |
11783 | while (child_die && child_die->tag) |
11784 | { | |
11785 | if (child_die->tag != DW_TAG_enumerator) | |
11786 | { | |
e7c27a73 | 11787 | process_die (child_die, cu); |
c906108c SS |
11788 | } |
11789 | else | |
11790 | { | |
39cbfefa DJ |
11791 | name = dwarf2_name (child_die, cu); |
11792 | if (name) | |
c906108c | 11793 | { |
f792889a | 11794 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 11795 | if (SYMBOL_VALUE (sym) < 0) |
cafec441 TT |
11796 | { |
11797 | unsigned_enum = 0; | |
11798 | flag_enum = 0; | |
11799 | } | |
11800 | else if ((mask & SYMBOL_VALUE (sym)) != 0) | |
11801 | flag_enum = 0; | |
11802 | else | |
11803 | mask |= SYMBOL_VALUE (sym); | |
c906108c SS |
11804 | |
11805 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
11806 | { | |
11807 | fields = (struct field *) | |
11808 | xrealloc (fields, | |
11809 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 11810 | * sizeof (struct field)); |
c906108c SS |
11811 | } |
11812 | ||
3567439c | 11813 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 11814 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 11815 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
11816 | FIELD_BITSIZE (fields[num_fields]) = 0; |
11817 | ||
11818 | num_fields++; | |
11819 | } | |
11820 | } | |
11821 | ||
11822 | child_die = sibling_die (child_die); | |
11823 | } | |
11824 | ||
11825 | if (num_fields) | |
11826 | { | |
f792889a DJ |
11827 | TYPE_NFIELDS (this_type) = num_fields; |
11828 | TYPE_FIELDS (this_type) = (struct field *) | |
11829 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
11830 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 11831 | sizeof (struct field) * num_fields); |
b8c9b27d | 11832 | xfree (fields); |
c906108c SS |
11833 | } |
11834 | if (unsigned_enum) | |
876cecd0 | 11835 | TYPE_UNSIGNED (this_type) = 1; |
cafec441 TT |
11836 | if (flag_enum) |
11837 | TYPE_FLAG_ENUM (this_type) = 1; | |
c906108c | 11838 | } |
134d01f1 | 11839 | |
6c83ed52 TT |
11840 | /* If we are reading an enum from a .debug_types unit, and the enum |
11841 | is a declaration, and the enum is not the signatured type in the | |
11842 | unit, then we do not want to add a symbol for it. Adding a | |
11843 | symbol would in some cases obscure the true definition of the | |
11844 | enum, giving users an incomplete type when the definition is | |
11845 | actually available. Note that we do not want to do this for all | |
11846 | enums which are just declarations, because C++0x allows forward | |
11847 | enum declarations. */ | |
3019eac3 | 11848 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
11849 | && die_is_declaration (die, cu)) |
11850 | { | |
52dc124a | 11851 | struct signatured_type *sig_type; |
6c83ed52 | 11852 | |
c0f78cd4 | 11853 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
11854 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
11855 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
11856 | return; |
11857 | } | |
11858 | ||
f792889a | 11859 | new_symbol (die, this_type, cu); |
c906108c SS |
11860 | } |
11861 | ||
11862 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
11863 | the DIE's type field. For now, this only handles one dimensional | |
11864 | arrays. */ | |
11865 | ||
f792889a | 11866 | static struct type * |
e7c27a73 | 11867 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11868 | { |
e7c27a73 | 11869 | struct objfile *objfile = cu->objfile; |
c906108c | 11870 | struct die_info *child_die; |
7e314c57 | 11871 | struct type *type; |
c906108c SS |
11872 | struct type *element_type, *range_type, *index_type; |
11873 | struct type **range_types = NULL; | |
11874 | struct attribute *attr; | |
11875 | int ndim = 0; | |
11876 | struct cleanup *back_to; | |
15d034d0 | 11877 | const char *name; |
c906108c | 11878 | |
e7c27a73 | 11879 | element_type = die_type (die, cu); |
c906108c | 11880 | |
7e314c57 JK |
11881 | /* The die_type call above may have already set the type for this DIE. */ |
11882 | type = get_die_type (die, cu); | |
11883 | if (type) | |
11884 | return type; | |
11885 | ||
c906108c SS |
11886 | /* Irix 6.2 native cc creates array types without children for |
11887 | arrays with unspecified length. */ | |
639d11d3 | 11888 | if (die->child == NULL) |
c906108c | 11889 | { |
46bf5051 | 11890 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 11891 | range_type = create_range_type (NULL, index_type, 0, -1); |
f792889a DJ |
11892 | type = create_array_type (NULL, element_type, range_type); |
11893 | return set_die_type (die, type, cu); | |
c906108c SS |
11894 | } |
11895 | ||
11896 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 11897 | child_die = die->child; |
c906108c SS |
11898 | while (child_die && child_die->tag) |
11899 | { | |
11900 | if (child_die->tag == DW_TAG_subrange_type) | |
11901 | { | |
f792889a | 11902 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 11903 | |
f792889a | 11904 | if (child_type != NULL) |
a02abb62 | 11905 | { |
0963b4bd MS |
11906 | /* The range type was succesfully read. Save it for the |
11907 | array type creation. */ | |
a02abb62 JB |
11908 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
11909 | { | |
11910 | range_types = (struct type **) | |
11911 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
11912 | * sizeof (struct type *)); | |
11913 | if (ndim == 0) | |
11914 | make_cleanup (free_current_contents, &range_types); | |
11915 | } | |
f792889a | 11916 | range_types[ndim++] = child_type; |
a02abb62 | 11917 | } |
c906108c SS |
11918 | } |
11919 | child_die = sibling_die (child_die); | |
11920 | } | |
11921 | ||
11922 | /* Dwarf2 dimensions are output from left to right, create the | |
11923 | necessary array types in backwards order. */ | |
7ca2d3a3 | 11924 | |
c906108c | 11925 | type = element_type; |
7ca2d3a3 DL |
11926 | |
11927 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
11928 | { | |
11929 | int i = 0; | |
9a619af0 | 11930 | |
7ca2d3a3 DL |
11931 | while (i < ndim) |
11932 | type = create_array_type (NULL, type, range_types[i++]); | |
11933 | } | |
11934 | else | |
11935 | { | |
11936 | while (ndim-- > 0) | |
11937 | type = create_array_type (NULL, type, range_types[ndim]); | |
11938 | } | |
c906108c | 11939 | |
f5f8a009 EZ |
11940 | /* Understand Dwarf2 support for vector types (like they occur on |
11941 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
11942 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
11943 | custom vendor extension. The main difference between a regular | |
11944 | array and the vector variant is that vectors are passed by value | |
11945 | to functions. */ | |
e142c38c | 11946 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 11947 | if (attr) |
ea37ba09 | 11948 | make_vector_type (type); |
f5f8a009 | 11949 | |
dbc98a8b KW |
11950 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
11951 | implementation may choose to implement triple vectors using this | |
11952 | attribute. */ | |
11953 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
11954 | if (attr) | |
11955 | { | |
11956 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
11957 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11958 | else | |
3e43a32a MS |
11959 | complaint (&symfile_complaints, |
11960 | _("DW_AT_byte_size for array type smaller " | |
11961 | "than the total size of elements")); | |
dbc98a8b KW |
11962 | } |
11963 | ||
39cbfefa DJ |
11964 | name = dwarf2_name (die, cu); |
11965 | if (name) | |
11966 | TYPE_NAME (type) = name; | |
6e70227d | 11967 | |
0963b4bd | 11968 | /* Install the type in the die. */ |
7e314c57 JK |
11969 | set_die_type (die, type, cu); |
11970 | ||
11971 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
11972 | set_descriptive_type (type, die, cu); |
11973 | ||
c906108c SS |
11974 | do_cleanups (back_to); |
11975 | ||
7e314c57 | 11976 | return type; |
c906108c SS |
11977 | } |
11978 | ||
7ca2d3a3 | 11979 | static enum dwarf_array_dim_ordering |
6e70227d | 11980 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
11981 | { |
11982 | struct attribute *attr; | |
11983 | ||
11984 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
11985 | ||
11986 | if (attr) return DW_SND (attr); | |
11987 | ||
0963b4bd MS |
11988 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
11989 | opposite order to the dwarf2 specification, but data is still | |
11990 | laid out as per normal fortran. | |
7ca2d3a3 | 11991 | |
0963b4bd MS |
11992 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
11993 | version checking. */ | |
7ca2d3a3 | 11994 | |
905e0470 PM |
11995 | if (cu->language == language_fortran |
11996 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
11997 | { |
11998 | return DW_ORD_row_major; | |
11999 | } | |
12000 | ||
6e70227d | 12001 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
12002 | { |
12003 | case array_column_major: | |
12004 | return DW_ORD_col_major; | |
12005 | case array_row_major: | |
12006 | default: | |
12007 | return DW_ORD_row_major; | |
12008 | }; | |
12009 | } | |
12010 | ||
72019c9c | 12011 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 12012 | the DIE's type field. */ |
72019c9c | 12013 | |
f792889a | 12014 | static struct type * |
72019c9c GM |
12015 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
12016 | { | |
7e314c57 JK |
12017 | struct type *domain_type, *set_type; |
12018 | struct attribute *attr; | |
f792889a | 12019 | |
7e314c57 JK |
12020 | domain_type = die_type (die, cu); |
12021 | ||
12022 | /* The die_type call above may have already set the type for this DIE. */ | |
12023 | set_type = get_die_type (die, cu); | |
12024 | if (set_type) | |
12025 | return set_type; | |
12026 | ||
12027 | set_type = create_set_type (NULL, domain_type); | |
12028 | ||
12029 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
12030 | if (attr) |
12031 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 12032 | |
f792889a | 12033 | return set_die_type (die, set_type, cu); |
72019c9c | 12034 | } |
7ca2d3a3 | 12035 | |
0971de02 TT |
12036 | /* A helper for read_common_block that creates a locexpr baton. |
12037 | SYM is the symbol which we are marking as computed. | |
12038 | COMMON_DIE is the DIE for the common block. | |
12039 | COMMON_LOC is the location expression attribute for the common | |
12040 | block itself. | |
12041 | MEMBER_LOC is the location expression attribute for the particular | |
12042 | member of the common block that we are processing. | |
12043 | CU is the CU from which the above come. */ | |
12044 | ||
12045 | static void | |
12046 | mark_common_block_symbol_computed (struct symbol *sym, | |
12047 | struct die_info *common_die, | |
12048 | struct attribute *common_loc, | |
12049 | struct attribute *member_loc, | |
12050 | struct dwarf2_cu *cu) | |
12051 | { | |
12052 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12053 | struct dwarf2_locexpr_baton *baton; | |
12054 | gdb_byte *ptr; | |
12055 | unsigned int cu_off; | |
12056 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
12057 | LONGEST offset = 0; | |
12058 | ||
12059 | gdb_assert (common_loc && member_loc); | |
12060 | gdb_assert (attr_form_is_block (common_loc)); | |
12061 | gdb_assert (attr_form_is_block (member_loc) | |
12062 | || attr_form_is_constant (member_loc)); | |
12063 | ||
12064 | baton = obstack_alloc (&objfile->objfile_obstack, | |
12065 | sizeof (struct dwarf2_locexpr_baton)); | |
12066 | baton->per_cu = cu->per_cu; | |
12067 | gdb_assert (baton->per_cu); | |
12068 | ||
12069 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
12070 | ||
12071 | if (attr_form_is_constant (member_loc)) | |
12072 | { | |
12073 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
12074 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
12075 | } | |
12076 | else | |
12077 | baton->size += DW_BLOCK (member_loc)->size; | |
12078 | ||
12079 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
12080 | baton->data = ptr; | |
12081 | ||
12082 | *ptr++ = DW_OP_call4; | |
12083 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
12084 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
12085 | ptr += 4; | |
12086 | ||
12087 | if (attr_form_is_constant (member_loc)) | |
12088 | { | |
12089 | *ptr++ = DW_OP_addr; | |
12090 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
12091 | ptr += cu->header.addr_size; | |
12092 | } | |
12093 | else | |
12094 | { | |
12095 | /* We have to copy the data here, because DW_OP_call4 will only | |
12096 | use a DW_AT_location attribute. */ | |
12097 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
12098 | ptr += DW_BLOCK (member_loc)->size; | |
12099 | } | |
12100 | ||
12101 | *ptr++ = DW_OP_plus; | |
12102 | gdb_assert (ptr - baton->data == baton->size); | |
12103 | ||
0971de02 | 12104 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 12105 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
12106 | } |
12107 | ||
4357ac6c TT |
12108 | /* Create appropriate locally-scoped variables for all the |
12109 | DW_TAG_common_block entries. Also create a struct common_block | |
12110 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
12111 | is used to sepate the common blocks name namespace from regular | |
12112 | variable names. */ | |
c906108c SS |
12113 | |
12114 | static void | |
e7c27a73 | 12115 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12116 | { |
0971de02 TT |
12117 | struct attribute *attr; |
12118 | ||
12119 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
12120 | if (attr) | |
12121 | { | |
12122 | /* Support the .debug_loc offsets. */ | |
12123 | if (attr_form_is_block (attr)) | |
12124 | { | |
12125 | /* Ok. */ | |
12126 | } | |
12127 | else if (attr_form_is_section_offset (attr)) | |
12128 | { | |
12129 | dwarf2_complex_location_expr_complaint (); | |
12130 | attr = NULL; | |
12131 | } | |
12132 | else | |
12133 | { | |
12134 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
12135 | "common block member"); | |
12136 | attr = NULL; | |
12137 | } | |
12138 | } | |
12139 | ||
639d11d3 | 12140 | if (die->child != NULL) |
c906108c | 12141 | { |
4357ac6c TT |
12142 | struct objfile *objfile = cu->objfile; |
12143 | struct die_info *child_die; | |
12144 | size_t n_entries = 0, size; | |
12145 | struct common_block *common_block; | |
12146 | struct symbol *sym; | |
74ac6d43 | 12147 | |
4357ac6c TT |
12148 | for (child_die = die->child; |
12149 | child_die && child_die->tag; | |
12150 | child_die = sibling_die (child_die)) | |
12151 | ++n_entries; | |
12152 | ||
12153 | size = (sizeof (struct common_block) | |
12154 | + (n_entries - 1) * sizeof (struct symbol *)); | |
12155 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
12156 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
12157 | common_block->n_entries = 0; | |
12158 | ||
12159 | for (child_die = die->child; | |
12160 | child_die && child_die->tag; | |
12161 | child_die = sibling_die (child_die)) | |
12162 | { | |
12163 | /* Create the symbol in the DW_TAG_common_block block in the current | |
12164 | symbol scope. */ | |
e7c27a73 | 12165 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
12166 | if (sym != NULL) |
12167 | { | |
12168 | struct attribute *member_loc; | |
12169 | ||
12170 | common_block->contents[common_block->n_entries++] = sym; | |
12171 | ||
12172 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
12173 | cu); | |
12174 | if (member_loc) | |
12175 | { | |
12176 | /* GDB has handled this for a long time, but it is | |
12177 | not specified by DWARF. It seems to have been | |
12178 | emitted by gfortran at least as recently as: | |
12179 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
12180 | complaint (&symfile_complaints, | |
12181 | _("Variable in common block has " | |
12182 | "DW_AT_data_member_location " | |
12183 | "- DIE at 0x%x [in module %s]"), | |
12184 | child_die->offset.sect_off, cu->objfile->name); | |
12185 | ||
12186 | if (attr_form_is_section_offset (member_loc)) | |
12187 | dwarf2_complex_location_expr_complaint (); | |
12188 | else if (attr_form_is_constant (member_loc) | |
12189 | || attr_form_is_block (member_loc)) | |
12190 | { | |
12191 | if (attr) | |
12192 | mark_common_block_symbol_computed (sym, die, attr, | |
12193 | member_loc, cu); | |
12194 | } | |
12195 | else | |
12196 | dwarf2_complex_location_expr_complaint (); | |
12197 | } | |
12198 | } | |
c906108c | 12199 | } |
4357ac6c TT |
12200 | |
12201 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
12202 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
12203 | } |
12204 | } | |
12205 | ||
0114d602 | 12206 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 12207 | |
0114d602 DJ |
12208 | static struct type * |
12209 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 12210 | { |
e7c27a73 | 12211 | struct objfile *objfile = cu->objfile; |
0114d602 | 12212 | const char *previous_prefix, *name; |
9219021c | 12213 | int is_anonymous; |
0114d602 DJ |
12214 | struct type *type; |
12215 | ||
12216 | /* For extensions, reuse the type of the original namespace. */ | |
12217 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
12218 | { | |
12219 | struct die_info *ext_die; | |
12220 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 12221 | |
0114d602 DJ |
12222 | ext_die = dwarf2_extension (die, &ext_cu); |
12223 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
12224 | |
12225 | /* EXT_CU may not be the same as CU. | |
02142a6c | 12226 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
12227 | return set_die_type (die, type, cu); |
12228 | } | |
9219021c | 12229 | |
e142c38c | 12230 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
12231 | |
12232 | /* Now build the name of the current namespace. */ | |
12233 | ||
0114d602 DJ |
12234 | previous_prefix = determine_prefix (die, cu); |
12235 | if (previous_prefix[0] != '\0') | |
12236 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 12237 | previous_prefix, name, 0, cu); |
0114d602 DJ |
12238 | |
12239 | /* Create the type. */ | |
12240 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
12241 | objfile); | |
abee88f2 | 12242 | TYPE_NAME (type) = name; |
0114d602 DJ |
12243 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
12244 | ||
60531b24 | 12245 | return set_die_type (die, type, cu); |
0114d602 DJ |
12246 | } |
12247 | ||
12248 | /* Read a C++ namespace. */ | |
12249 | ||
12250 | static void | |
12251 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
12252 | { | |
12253 | struct objfile *objfile = cu->objfile; | |
0114d602 | 12254 | int is_anonymous; |
9219021c | 12255 | |
5c4e30ca DC |
12256 | /* Add a symbol associated to this if we haven't seen the namespace |
12257 | before. Also, add a using directive if it's an anonymous | |
12258 | namespace. */ | |
9219021c | 12259 | |
f2f0e013 | 12260 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
12261 | { |
12262 | struct type *type; | |
12263 | ||
0114d602 | 12264 | type = read_type_die (die, cu); |
e7c27a73 | 12265 | new_symbol (die, type, cu); |
5c4e30ca | 12266 | |
e8e80198 | 12267 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 12268 | if (is_anonymous) |
0114d602 DJ |
12269 | { |
12270 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 12271 | |
c0cc3a76 | 12272 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
12aaed36 | 12273 | NULL, NULL, 0, &objfile->objfile_obstack); |
0114d602 | 12274 | } |
5c4e30ca | 12275 | } |
9219021c | 12276 | |
639d11d3 | 12277 | if (die->child != NULL) |
d9fa45fe | 12278 | { |
639d11d3 | 12279 | struct die_info *child_die = die->child; |
6e70227d | 12280 | |
d9fa45fe DC |
12281 | while (child_die && child_die->tag) |
12282 | { | |
e7c27a73 | 12283 | process_die (child_die, cu); |
d9fa45fe DC |
12284 | child_die = sibling_die (child_die); |
12285 | } | |
12286 | } | |
38d518c9 EZ |
12287 | } |
12288 | ||
f55ee35c JK |
12289 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
12290 | imported module. Still we need that type as local Fortran "use ... only" | |
12291 | declaration imports depend on the created type in determine_prefix. */ | |
12292 | ||
12293 | static struct type * | |
12294 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
12295 | { | |
12296 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 12297 | const char *module_name; |
f55ee35c JK |
12298 | struct type *type; |
12299 | ||
12300 | module_name = dwarf2_name (die, cu); | |
12301 | if (!module_name) | |
3e43a32a MS |
12302 | complaint (&symfile_complaints, |
12303 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 12304 | die->offset.sect_off); |
f55ee35c JK |
12305 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
12306 | ||
12307 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
12308 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
12309 | ||
12310 | return set_die_type (die, type, cu); | |
12311 | } | |
12312 | ||
5d7cb8df JK |
12313 | /* Read a Fortran module. */ |
12314 | ||
12315 | static void | |
12316 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
12317 | { | |
12318 | struct die_info *child_die = die->child; | |
12319 | ||
5d7cb8df JK |
12320 | while (child_die && child_die->tag) |
12321 | { | |
12322 | process_die (child_die, cu); | |
12323 | child_die = sibling_die (child_die); | |
12324 | } | |
12325 | } | |
12326 | ||
38d518c9 EZ |
12327 | /* Return the name of the namespace represented by DIE. Set |
12328 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
12329 | namespace. */ | |
12330 | ||
12331 | static const char * | |
e142c38c | 12332 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
12333 | { |
12334 | struct die_info *current_die; | |
12335 | const char *name = NULL; | |
12336 | ||
12337 | /* Loop through the extensions until we find a name. */ | |
12338 | ||
12339 | for (current_die = die; | |
12340 | current_die != NULL; | |
f2f0e013 | 12341 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 12342 | { |
e142c38c | 12343 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
12344 | if (name != NULL) |
12345 | break; | |
12346 | } | |
12347 | ||
12348 | /* Is it an anonymous namespace? */ | |
12349 | ||
12350 | *is_anonymous = (name == NULL); | |
12351 | if (*is_anonymous) | |
2b1dbab0 | 12352 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
12353 | |
12354 | return name; | |
d9fa45fe DC |
12355 | } |
12356 | ||
c906108c SS |
12357 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
12358 | the user defined type vector. */ | |
12359 | ||
f792889a | 12360 | static struct type * |
e7c27a73 | 12361 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12362 | { |
5e2b427d | 12363 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 12364 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 12365 | struct type *type; |
8b2dbe47 KB |
12366 | struct attribute *attr_byte_size; |
12367 | struct attribute *attr_address_class; | |
12368 | int byte_size, addr_class; | |
7e314c57 JK |
12369 | struct type *target_type; |
12370 | ||
12371 | target_type = die_type (die, cu); | |
c906108c | 12372 | |
7e314c57 JK |
12373 | /* The die_type call above may have already set the type for this DIE. */ |
12374 | type = get_die_type (die, cu); | |
12375 | if (type) | |
12376 | return type; | |
12377 | ||
12378 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 12379 | |
e142c38c | 12380 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
12381 | if (attr_byte_size) |
12382 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 12383 | else |
8b2dbe47 KB |
12384 | byte_size = cu_header->addr_size; |
12385 | ||
e142c38c | 12386 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
12387 | if (attr_address_class) |
12388 | addr_class = DW_UNSND (attr_address_class); | |
12389 | else | |
12390 | addr_class = DW_ADDR_none; | |
12391 | ||
12392 | /* If the pointer size or address class is different than the | |
12393 | default, create a type variant marked as such and set the | |
12394 | length accordingly. */ | |
12395 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 12396 | { |
5e2b427d | 12397 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
12398 | { |
12399 | int type_flags; | |
12400 | ||
849957d9 | 12401 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 12402 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
12403 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
12404 | == 0); | |
8b2dbe47 KB |
12405 | type = make_type_with_address_space (type, type_flags); |
12406 | } | |
12407 | else if (TYPE_LENGTH (type) != byte_size) | |
12408 | { | |
3e43a32a MS |
12409 | complaint (&symfile_complaints, |
12410 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 12411 | } |
6e70227d | 12412 | else |
9a619af0 MS |
12413 | { |
12414 | /* Should we also complain about unhandled address classes? */ | |
12415 | } | |
c906108c | 12416 | } |
8b2dbe47 KB |
12417 | |
12418 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 12419 | return set_die_type (die, type, cu); |
c906108c SS |
12420 | } |
12421 | ||
12422 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
12423 | the user defined type vector. */ | |
12424 | ||
f792889a | 12425 | static struct type * |
e7c27a73 | 12426 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
12427 | { |
12428 | struct type *type; | |
12429 | struct type *to_type; | |
12430 | struct type *domain; | |
12431 | ||
e7c27a73 DJ |
12432 | to_type = die_type (die, cu); |
12433 | domain = die_containing_type (die, cu); | |
0d5de010 | 12434 | |
7e314c57 JK |
12435 | /* The calls above may have already set the type for this DIE. */ |
12436 | type = get_die_type (die, cu); | |
12437 | if (type) | |
12438 | return type; | |
12439 | ||
0d5de010 DJ |
12440 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
12441 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
12442 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
12443 | { | |
12444 | struct type *new_type = alloc_type (cu->objfile); | |
12445 | ||
12446 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
12447 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
12448 | TYPE_VARARGS (to_type)); | |
12449 | type = lookup_methodptr_type (new_type); | |
12450 | } | |
0d5de010 DJ |
12451 | else |
12452 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 12453 | |
f792889a | 12454 | return set_die_type (die, type, cu); |
c906108c SS |
12455 | } |
12456 | ||
12457 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
12458 | the user defined type vector. */ | |
12459 | ||
f792889a | 12460 | static struct type * |
e7c27a73 | 12461 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12462 | { |
e7c27a73 | 12463 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 12464 | struct type *type, *target_type; |
c906108c SS |
12465 | struct attribute *attr; |
12466 | ||
7e314c57 JK |
12467 | target_type = die_type (die, cu); |
12468 | ||
12469 | /* The die_type call above may have already set the type for this DIE. */ | |
12470 | type = get_die_type (die, cu); | |
12471 | if (type) | |
12472 | return type; | |
12473 | ||
12474 | type = lookup_reference_type (target_type); | |
e142c38c | 12475 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12476 | if (attr) |
12477 | { | |
12478 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12479 | } | |
12480 | else | |
12481 | { | |
107d2387 | 12482 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 12483 | } |
f792889a | 12484 | return set_die_type (die, type, cu); |
c906108c SS |
12485 | } |
12486 | ||
f792889a | 12487 | static struct type * |
e7c27a73 | 12488 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12489 | { |
f792889a | 12490 | struct type *base_type, *cv_type; |
c906108c | 12491 | |
e7c27a73 | 12492 | base_type = die_type (die, cu); |
7e314c57 JK |
12493 | |
12494 | /* The die_type call above may have already set the type for this DIE. */ | |
12495 | cv_type = get_die_type (die, cu); | |
12496 | if (cv_type) | |
12497 | return cv_type; | |
12498 | ||
2f608a3a KW |
12499 | /* In case the const qualifier is applied to an array type, the element type |
12500 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
12501 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
12502 | { | |
12503 | struct type *el_type, *inner_array; | |
12504 | ||
12505 | base_type = copy_type (base_type); | |
12506 | inner_array = base_type; | |
12507 | ||
12508 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
12509 | { | |
12510 | TYPE_TARGET_TYPE (inner_array) = | |
12511 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
12512 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
12513 | } | |
12514 | ||
12515 | el_type = TYPE_TARGET_TYPE (inner_array); | |
12516 | TYPE_TARGET_TYPE (inner_array) = | |
12517 | make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL); | |
12518 | ||
12519 | return set_die_type (die, base_type, cu); | |
12520 | } | |
12521 | ||
f792889a DJ |
12522 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
12523 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12524 | } |
12525 | ||
f792889a | 12526 | static struct type * |
e7c27a73 | 12527 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12528 | { |
f792889a | 12529 | struct type *base_type, *cv_type; |
c906108c | 12530 | |
e7c27a73 | 12531 | base_type = die_type (die, cu); |
7e314c57 JK |
12532 | |
12533 | /* The die_type call above may have already set the type for this DIE. */ | |
12534 | cv_type = get_die_type (die, cu); | |
12535 | if (cv_type) | |
12536 | return cv_type; | |
12537 | ||
f792889a DJ |
12538 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
12539 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12540 | } |
12541 | ||
06d66ee9 TT |
12542 | /* Handle DW_TAG_restrict_type. */ |
12543 | ||
12544 | static struct type * | |
12545 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
12546 | { | |
12547 | struct type *base_type, *cv_type; | |
12548 | ||
12549 | base_type = die_type (die, cu); | |
12550 | ||
12551 | /* The die_type call above may have already set the type for this DIE. */ | |
12552 | cv_type = get_die_type (die, cu); | |
12553 | if (cv_type) | |
12554 | return cv_type; | |
12555 | ||
12556 | cv_type = make_restrict_type (base_type); | |
12557 | return set_die_type (die, cv_type, cu); | |
12558 | } | |
12559 | ||
c906108c SS |
12560 | /* Extract all information from a DW_TAG_string_type DIE and add to |
12561 | the user defined type vector. It isn't really a user defined type, | |
12562 | but it behaves like one, with other DIE's using an AT_user_def_type | |
12563 | attribute to reference it. */ | |
12564 | ||
f792889a | 12565 | static struct type * |
e7c27a73 | 12566 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12567 | { |
e7c27a73 | 12568 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 12569 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12570 | struct type *type, *range_type, *index_type, *char_type; |
12571 | struct attribute *attr; | |
12572 | unsigned int length; | |
12573 | ||
e142c38c | 12574 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
12575 | if (attr) |
12576 | { | |
12577 | length = DW_UNSND (attr); | |
12578 | } | |
12579 | else | |
12580 | { | |
0963b4bd | 12581 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 12582 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
12583 | if (attr) |
12584 | { | |
12585 | length = DW_UNSND (attr); | |
12586 | } | |
12587 | else | |
12588 | { | |
12589 | length = 1; | |
12590 | } | |
c906108c | 12591 | } |
6ccb9162 | 12592 | |
46bf5051 | 12593 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 12594 | range_type = create_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
12595 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
12596 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 12597 | |
f792889a | 12598 | return set_die_type (die, type, cu); |
c906108c SS |
12599 | } |
12600 | ||
12601 | /* Handle DIES due to C code like: | |
12602 | ||
12603 | struct foo | |
c5aa993b JM |
12604 | { |
12605 | int (*funcp)(int a, long l); | |
12606 | int b; | |
12607 | }; | |
c906108c | 12608 | |
0963b4bd | 12609 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 12610 | |
f792889a | 12611 | static struct type * |
e7c27a73 | 12612 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12613 | { |
bb5ed363 | 12614 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
12615 | struct type *type; /* Type that this function returns. */ |
12616 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
12617 | struct attribute *attr; |
12618 | ||
e7c27a73 | 12619 | type = die_type (die, cu); |
7e314c57 JK |
12620 | |
12621 | /* The die_type call above may have already set the type for this DIE. */ | |
12622 | ftype = get_die_type (die, cu); | |
12623 | if (ftype) | |
12624 | return ftype; | |
12625 | ||
0c8b41f1 | 12626 | ftype = lookup_function_type (type); |
c906108c | 12627 | |
5b8101ae | 12628 | /* All functions in C++, Pascal and Java have prototypes. */ |
e142c38c | 12629 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
c906108c | 12630 | if ((attr && (DW_UNSND (attr) != 0)) |
987504bb | 12631 | || cu->language == language_cplus |
5b8101ae PM |
12632 | || cu->language == language_java |
12633 | || cu->language == language_pascal) | |
876cecd0 | 12634 | TYPE_PROTOTYPED (ftype) = 1; |
a6c727b2 DJ |
12635 | else if (producer_is_realview (cu->producer)) |
12636 | /* RealView does not emit DW_AT_prototyped. We can not | |
12637 | distinguish prototyped and unprototyped functions; default to | |
12638 | prototyped, since that is more common in modern code (and | |
12639 | RealView warns about unprototyped functions). */ | |
12640 | TYPE_PROTOTYPED (ftype) = 1; | |
c906108c | 12641 | |
c055b101 CV |
12642 | /* Store the calling convention in the type if it's available in |
12643 | the subroutine die. Otherwise set the calling convention to | |
12644 | the default value DW_CC_normal. */ | |
12645 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
12646 | if (attr) |
12647 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
12648 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
12649 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
12650 | else | |
12651 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
12652 | |
12653 | /* We need to add the subroutine type to the die immediately so | |
12654 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 12655 | declared as the same subroutine type. */ |
76c10ea2 | 12656 | set_die_type (die, ftype, cu); |
6e70227d | 12657 | |
639d11d3 | 12658 | if (die->child != NULL) |
c906108c | 12659 | { |
bb5ed363 | 12660 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 12661 | struct die_info *child_die; |
8072405b | 12662 | int nparams, iparams; |
c906108c SS |
12663 | |
12664 | /* Count the number of parameters. | |
12665 | FIXME: GDB currently ignores vararg functions, but knows about | |
12666 | vararg member functions. */ | |
8072405b | 12667 | nparams = 0; |
639d11d3 | 12668 | child_die = die->child; |
c906108c SS |
12669 | while (child_die && child_die->tag) |
12670 | { | |
12671 | if (child_die->tag == DW_TAG_formal_parameter) | |
12672 | nparams++; | |
12673 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 12674 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
12675 | child_die = sibling_die (child_die); |
12676 | } | |
12677 | ||
12678 | /* Allocate storage for parameters and fill them in. */ | |
12679 | TYPE_NFIELDS (ftype) = nparams; | |
12680 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 12681 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 12682 | |
8072405b JK |
12683 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
12684 | even if we error out during the parameters reading below. */ | |
12685 | for (iparams = 0; iparams < nparams; iparams++) | |
12686 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
12687 | ||
12688 | iparams = 0; | |
639d11d3 | 12689 | child_die = die->child; |
c906108c SS |
12690 | while (child_die && child_die->tag) |
12691 | { | |
12692 | if (child_die->tag == DW_TAG_formal_parameter) | |
12693 | { | |
3ce3b1ba PA |
12694 | struct type *arg_type; |
12695 | ||
12696 | /* DWARF version 2 has no clean way to discern C++ | |
12697 | static and non-static member functions. G++ helps | |
12698 | GDB by marking the first parameter for non-static | |
12699 | member functions (which is the this pointer) as | |
12700 | artificial. We pass this information to | |
12701 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
12702 | ||
12703 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
12704 | 4.5 does not yet generate. */ | |
e142c38c | 12705 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
12706 | if (attr) |
12707 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
12708 | else | |
418835cc KS |
12709 | { |
12710 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
12711 | ||
12712 | /* GCC/43521: In java, the formal parameter | |
12713 | "this" is sometimes not marked with DW_AT_artificial. */ | |
12714 | if (cu->language == language_java) | |
12715 | { | |
12716 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 12717 | |
418835cc KS |
12718 | if (name && !strcmp (name, "this")) |
12719 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
12720 | } | |
12721 | } | |
3ce3b1ba PA |
12722 | arg_type = die_type (child_die, cu); |
12723 | ||
12724 | /* RealView does not mark THIS as const, which the testsuite | |
12725 | expects. GCC marks THIS as const in method definitions, | |
12726 | but not in the class specifications (GCC PR 43053). */ | |
12727 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
12728 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
12729 | { | |
12730 | int is_this = 0; | |
12731 | struct dwarf2_cu *arg_cu = cu; | |
12732 | const char *name = dwarf2_name (child_die, cu); | |
12733 | ||
12734 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
12735 | if (attr) | |
12736 | { | |
12737 | /* If the compiler emits this, use it. */ | |
12738 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
12739 | is_this = 1; | |
12740 | } | |
12741 | else if (name && strcmp (name, "this") == 0) | |
12742 | /* Function definitions will have the argument names. */ | |
12743 | is_this = 1; | |
12744 | else if (name == NULL && iparams == 0) | |
12745 | /* Declarations may not have the names, so like | |
12746 | elsewhere in GDB, assume an artificial first | |
12747 | argument is "this". */ | |
12748 | is_this = 1; | |
12749 | ||
12750 | if (is_this) | |
12751 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
12752 | arg_type, 0); | |
12753 | } | |
12754 | ||
12755 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
12756 | iparams++; |
12757 | } | |
12758 | child_die = sibling_die (child_die); | |
12759 | } | |
12760 | } | |
12761 | ||
76c10ea2 | 12762 | return ftype; |
c906108c SS |
12763 | } |
12764 | ||
f792889a | 12765 | static struct type * |
e7c27a73 | 12766 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12767 | { |
e7c27a73 | 12768 | struct objfile *objfile = cu->objfile; |
0114d602 | 12769 | const char *name = NULL; |
3c8e0968 | 12770 | struct type *this_type, *target_type; |
c906108c | 12771 | |
94af9270 | 12772 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 12773 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 12774 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 12775 | TYPE_NAME (this_type) = name; |
f792889a | 12776 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
12777 | target_type = die_type (die, cu); |
12778 | if (target_type != this_type) | |
12779 | TYPE_TARGET_TYPE (this_type) = target_type; | |
12780 | else | |
12781 | { | |
12782 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
12783 | spec and cause infinite loops in GDB. */ | |
12784 | complaint (&symfile_complaints, | |
12785 | _("Self-referential DW_TAG_typedef " | |
12786 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 12787 | die->offset.sect_off, objfile->name); |
3c8e0968 DE |
12788 | TYPE_TARGET_TYPE (this_type) = NULL; |
12789 | } | |
f792889a | 12790 | return this_type; |
c906108c SS |
12791 | } |
12792 | ||
12793 | /* Find a representation of a given base type and install | |
12794 | it in the TYPE field of the die. */ | |
12795 | ||
f792889a | 12796 | static struct type * |
e7c27a73 | 12797 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12798 | { |
e7c27a73 | 12799 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12800 | struct type *type; |
12801 | struct attribute *attr; | |
12802 | int encoding = 0, size = 0; | |
15d034d0 | 12803 | const char *name; |
6ccb9162 UW |
12804 | enum type_code code = TYPE_CODE_INT; |
12805 | int type_flags = 0; | |
12806 | struct type *target_type = NULL; | |
c906108c | 12807 | |
e142c38c | 12808 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
12809 | if (attr) |
12810 | { | |
12811 | encoding = DW_UNSND (attr); | |
12812 | } | |
e142c38c | 12813 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12814 | if (attr) |
12815 | { | |
12816 | size = DW_UNSND (attr); | |
12817 | } | |
39cbfefa | 12818 | name = dwarf2_name (die, cu); |
6ccb9162 | 12819 | if (!name) |
c906108c | 12820 | { |
6ccb9162 UW |
12821 | complaint (&symfile_complaints, |
12822 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 12823 | } |
6ccb9162 UW |
12824 | |
12825 | switch (encoding) | |
c906108c | 12826 | { |
6ccb9162 UW |
12827 | case DW_ATE_address: |
12828 | /* Turn DW_ATE_address into a void * pointer. */ | |
12829 | code = TYPE_CODE_PTR; | |
12830 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12831 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
12832 | break; | |
12833 | case DW_ATE_boolean: | |
12834 | code = TYPE_CODE_BOOL; | |
12835 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12836 | break; | |
12837 | case DW_ATE_complex_float: | |
12838 | code = TYPE_CODE_COMPLEX; | |
12839 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
12840 | break; | |
12841 | case DW_ATE_decimal_float: | |
12842 | code = TYPE_CODE_DECFLOAT; | |
12843 | break; | |
12844 | case DW_ATE_float: | |
12845 | code = TYPE_CODE_FLT; | |
12846 | break; | |
12847 | case DW_ATE_signed: | |
12848 | break; | |
12849 | case DW_ATE_unsigned: | |
12850 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
12851 | if (cu->language == language_fortran |
12852 | && name | |
12853 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
12854 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
12855 | break; |
12856 | case DW_ATE_signed_char: | |
6e70227d | 12857 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12858 | || cu->language == language_pascal |
12859 | || cu->language == language_fortran) | |
6ccb9162 UW |
12860 | code = TYPE_CODE_CHAR; |
12861 | break; | |
12862 | case DW_ATE_unsigned_char: | |
868a0084 | 12863 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12864 | || cu->language == language_pascal |
12865 | || cu->language == language_fortran) | |
6ccb9162 UW |
12866 | code = TYPE_CODE_CHAR; |
12867 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12868 | break; | |
75079b2b TT |
12869 | case DW_ATE_UTF: |
12870 | /* We just treat this as an integer and then recognize the | |
12871 | type by name elsewhere. */ | |
12872 | break; | |
12873 | ||
6ccb9162 UW |
12874 | default: |
12875 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
12876 | dwarf_type_encoding_name (encoding)); | |
12877 | break; | |
c906108c | 12878 | } |
6ccb9162 | 12879 | |
0114d602 DJ |
12880 | type = init_type (code, size, type_flags, NULL, objfile); |
12881 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
12882 | TYPE_TARGET_TYPE (type) = target_type; |
12883 | ||
0114d602 | 12884 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 12885 | TYPE_NOSIGN (type) = 1; |
0114d602 | 12886 | |
f792889a | 12887 | return set_die_type (die, type, cu); |
c906108c SS |
12888 | } |
12889 | ||
a02abb62 JB |
12890 | /* Read the given DW_AT_subrange DIE. */ |
12891 | ||
f792889a | 12892 | static struct type * |
a02abb62 JB |
12893 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
12894 | { | |
4c9ad8c2 | 12895 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
12896 | struct type *range_type; |
12897 | struct attribute *attr; | |
4fae6e18 JK |
12898 | LONGEST low, high; |
12899 | int low_default_is_valid; | |
15d034d0 | 12900 | const char *name; |
43bbcdc2 | 12901 | LONGEST negative_mask; |
e77813c8 | 12902 | |
4c9ad8c2 TT |
12903 | orig_base_type = die_type (die, cu); |
12904 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
12905 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
12906 | creating the range type, but we use the result of check_typedef | |
12907 | when examining properties of the type. */ | |
12908 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 12909 | |
7e314c57 JK |
12910 | /* The die_type call above may have already set the type for this DIE. */ |
12911 | range_type = get_die_type (die, cu); | |
12912 | if (range_type) | |
12913 | return range_type; | |
12914 | ||
4fae6e18 JK |
12915 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
12916 | omitting DW_AT_lower_bound. */ | |
12917 | switch (cu->language) | |
6e70227d | 12918 | { |
4fae6e18 JK |
12919 | case language_c: |
12920 | case language_cplus: | |
12921 | low = 0; | |
12922 | low_default_is_valid = 1; | |
12923 | break; | |
12924 | case language_fortran: | |
12925 | low = 1; | |
12926 | low_default_is_valid = 1; | |
12927 | break; | |
12928 | case language_d: | |
12929 | case language_java: | |
12930 | case language_objc: | |
12931 | low = 0; | |
12932 | low_default_is_valid = (cu->header.version >= 4); | |
12933 | break; | |
12934 | case language_ada: | |
12935 | case language_m2: | |
12936 | case language_pascal: | |
a02abb62 | 12937 | low = 1; |
4fae6e18 JK |
12938 | low_default_is_valid = (cu->header.version >= 4); |
12939 | break; | |
12940 | default: | |
12941 | low = 0; | |
12942 | low_default_is_valid = 0; | |
12943 | break; | |
a02abb62 JB |
12944 | } |
12945 | ||
dd5e6932 DJ |
12946 | /* FIXME: For variable sized arrays either of these could be |
12947 | a variable rather than a constant value. We'll allow it, | |
12948 | but we don't know how to handle it. */ | |
e142c38c | 12949 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 12950 | if (attr) |
4fae6e18 JK |
12951 | low = dwarf2_get_attr_constant_value (attr, low); |
12952 | else if (!low_default_is_valid) | |
12953 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
12954 | "- DIE at 0x%x [in module %s]"), | |
12955 | die->offset.sect_off, cu->objfile->name); | |
a02abb62 | 12956 | |
e142c38c | 12957 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
a02abb62 | 12958 | if (attr) |
6e70227d | 12959 | { |
d48323d8 | 12960 | if (attr_form_is_block (attr) || is_ref_attr (attr)) |
a02abb62 JB |
12961 | { |
12962 | /* GCC encodes arrays with unspecified or dynamic length | |
e77813c8 | 12963 | with a DW_FORM_block1 attribute or a reference attribute. |
a02abb62 JB |
12964 | FIXME: GDB does not yet know how to handle dynamic |
12965 | arrays properly, treat them as arrays with unspecified | |
12966 | length for now. | |
12967 | ||
12968 | FIXME: jimb/2003-09-22: GDB does not really know | |
12969 | how to handle arrays of unspecified length | |
12970 | either; we just represent them as zero-length | |
12971 | arrays. Choose an appropriate upper bound given | |
12972 | the lower bound we've computed above. */ | |
12973 | high = low - 1; | |
12974 | } | |
12975 | else | |
12976 | high = dwarf2_get_attr_constant_value (attr, 1); | |
12977 | } | |
e77813c8 PM |
12978 | else |
12979 | { | |
12980 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
12981 | if (attr) | |
12982 | { | |
12983 | int count = dwarf2_get_attr_constant_value (attr, 1); | |
12984 | high = low + count - 1; | |
12985 | } | |
c2ff108b JK |
12986 | else |
12987 | { | |
12988 | /* Unspecified array length. */ | |
12989 | high = low - 1; | |
12990 | } | |
e77813c8 PM |
12991 | } |
12992 | ||
12993 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
12994 | without specifying a base type. | |
12995 | In that case, the base type must be set to the type of | |
12996 | the lower bound, upper bound or count, in that order, if any of these | |
12997 | three attributes references an object that has a type. | |
12998 | If no base type is found, the Dwarf-2 specifications say that | |
12999 | a signed integer type of size equal to the size of an address should | |
13000 | be used. | |
13001 | For the following C code: `extern char gdb_int [];' | |
13002 | GCC produces an empty range DIE. | |
13003 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 13004 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
13005 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
13006 | { | |
13007 | struct objfile *objfile = cu->objfile; | |
13008 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
13009 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
13010 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
13011 | ||
13012 | /* Test "int", "long int", and "long long int" objfile types, | |
13013 | and select the first one having a size above or equal to the | |
13014 | architecture address size. */ | |
13015 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13016 | base_type = int_type; | |
13017 | else | |
13018 | { | |
13019 | int_type = objfile_type (objfile)->builtin_long; | |
13020 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13021 | base_type = int_type; | |
13022 | else | |
13023 | { | |
13024 | int_type = objfile_type (objfile)->builtin_long_long; | |
13025 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13026 | base_type = int_type; | |
13027 | } | |
13028 | } | |
13029 | } | |
a02abb62 | 13030 | |
6e70227d | 13031 | negative_mask = |
43bbcdc2 PH |
13032 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
13033 | if (!TYPE_UNSIGNED (base_type) && (low & negative_mask)) | |
13034 | low |= negative_mask; | |
13035 | if (!TYPE_UNSIGNED (base_type) && (high & negative_mask)) | |
13036 | high |= negative_mask; | |
13037 | ||
4c9ad8c2 | 13038 | range_type = create_range_type (NULL, orig_base_type, low, high); |
a02abb62 | 13039 | |
bbb0eef6 JK |
13040 | /* Mark arrays with dynamic length at least as an array of unspecified |
13041 | length. GDB could check the boundary but before it gets implemented at | |
13042 | least allow accessing the array elements. */ | |
d48323d8 | 13043 | if (attr && attr_form_is_block (attr)) |
bbb0eef6 JK |
13044 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; |
13045 | ||
c2ff108b JK |
13046 | /* Ada expects an empty array on no boundary attributes. */ |
13047 | if (attr == NULL && cu->language != language_ada) | |
13048 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; | |
13049 | ||
39cbfefa DJ |
13050 | name = dwarf2_name (die, cu); |
13051 | if (name) | |
13052 | TYPE_NAME (range_type) = name; | |
6e70227d | 13053 | |
e142c38c | 13054 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
13055 | if (attr) |
13056 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
13057 | ||
7e314c57 JK |
13058 | set_die_type (die, range_type, cu); |
13059 | ||
13060 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13061 | set_descriptive_type (range_type, die, cu); |
13062 | ||
7e314c57 | 13063 | return range_type; |
a02abb62 | 13064 | } |
6e70227d | 13065 | |
f792889a | 13066 | static struct type * |
81a17f79 JB |
13067 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
13068 | { | |
13069 | struct type *type; | |
81a17f79 | 13070 | |
81a17f79 JB |
13071 | /* For now, we only support the C meaning of an unspecified type: void. */ |
13072 | ||
0114d602 DJ |
13073 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
13074 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 13075 | |
f792889a | 13076 | return set_die_type (die, type, cu); |
81a17f79 | 13077 | } |
a02abb62 | 13078 | |
639d11d3 DC |
13079 | /* Read a single die and all its descendents. Set the die's sibling |
13080 | field to NULL; set other fields in the die correctly, and set all | |
13081 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
13082 | location of the info_ptr after reading all of those dies. PARENT | |
13083 | is the parent of the die in question. */ | |
13084 | ||
13085 | static struct die_info * | |
dee91e82 | 13086 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
13087 | const gdb_byte *info_ptr, |
13088 | const gdb_byte **new_info_ptr, | |
dee91e82 | 13089 | struct die_info *parent) |
639d11d3 DC |
13090 | { |
13091 | struct die_info *die; | |
d521ce57 | 13092 | const gdb_byte *cur_ptr; |
639d11d3 DC |
13093 | int has_children; |
13094 | ||
bf6af496 | 13095 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
13096 | if (die == NULL) |
13097 | { | |
13098 | *new_info_ptr = cur_ptr; | |
13099 | return NULL; | |
13100 | } | |
93311388 | 13101 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
13102 | |
13103 | if (has_children) | |
bf6af496 | 13104 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
13105 | else |
13106 | { | |
13107 | die->child = NULL; | |
13108 | *new_info_ptr = cur_ptr; | |
13109 | } | |
13110 | ||
13111 | die->sibling = NULL; | |
13112 | die->parent = parent; | |
13113 | return die; | |
13114 | } | |
13115 | ||
13116 | /* Read a die, all of its descendents, and all of its siblings; set | |
13117 | all of the fields of all of the dies correctly. Arguments are as | |
13118 | in read_die_and_children. */ | |
13119 | ||
13120 | static struct die_info * | |
bf6af496 | 13121 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
13122 | const gdb_byte *info_ptr, |
13123 | const gdb_byte **new_info_ptr, | |
bf6af496 | 13124 | struct die_info *parent) |
639d11d3 DC |
13125 | { |
13126 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 13127 | const gdb_byte *cur_ptr; |
639d11d3 | 13128 | |
c906108c | 13129 | cur_ptr = info_ptr; |
639d11d3 DC |
13130 | first_die = last_sibling = NULL; |
13131 | ||
13132 | while (1) | |
c906108c | 13133 | { |
639d11d3 | 13134 | struct die_info *die |
dee91e82 | 13135 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 13136 | |
1d325ec1 | 13137 | if (die == NULL) |
c906108c | 13138 | { |
639d11d3 DC |
13139 | *new_info_ptr = cur_ptr; |
13140 | return first_die; | |
c906108c | 13141 | } |
1d325ec1 DJ |
13142 | |
13143 | if (!first_die) | |
13144 | first_die = die; | |
c906108c | 13145 | else |
1d325ec1 DJ |
13146 | last_sibling->sibling = die; |
13147 | ||
13148 | last_sibling = die; | |
c906108c | 13149 | } |
c906108c SS |
13150 | } |
13151 | ||
bf6af496 DE |
13152 | /* Read a die, all of its descendents, and all of its siblings; set |
13153 | all of the fields of all of the dies correctly. Arguments are as | |
13154 | in read_die_and_children. | |
13155 | This the main entry point for reading a DIE and all its children. */ | |
13156 | ||
13157 | static struct die_info * | |
13158 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
13159 | const gdb_byte *info_ptr, |
13160 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
13161 | struct die_info *parent) |
13162 | { | |
13163 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
13164 | new_info_ptr, parent); | |
13165 | ||
13166 | if (dwarf2_die_debug) | |
13167 | { | |
13168 | fprintf_unfiltered (gdb_stdlog, | |
13169 | "Read die from %s@0x%x of %s:\n", | |
13170 | bfd_section_name (reader->abfd, | |
13171 | reader->die_section->asection), | |
13172 | (unsigned) (info_ptr - reader->die_section->buffer), | |
13173 | bfd_get_filename (reader->abfd)); | |
13174 | dump_die (die, dwarf2_die_debug); | |
13175 | } | |
13176 | ||
13177 | return die; | |
13178 | } | |
13179 | ||
3019eac3 DE |
13180 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
13181 | attributes. | |
13182 | The caller is responsible for filling in the extra attributes | |
13183 | and updating (*DIEP)->num_attrs. | |
13184 | Set DIEP to point to a newly allocated die with its information, | |
13185 | except for its child, sibling, and parent fields. | |
13186 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 13187 | |
d521ce57 | 13188 | static const gdb_byte * |
3019eac3 | 13189 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 13190 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 13191 | int *has_children, int num_extra_attrs) |
93311388 | 13192 | { |
b64f50a1 JK |
13193 | unsigned int abbrev_number, bytes_read, i; |
13194 | sect_offset offset; | |
93311388 DE |
13195 | struct abbrev_info *abbrev; |
13196 | struct die_info *die; | |
13197 | struct dwarf2_cu *cu = reader->cu; | |
13198 | bfd *abfd = reader->abfd; | |
13199 | ||
b64f50a1 | 13200 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
13201 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
13202 | info_ptr += bytes_read; | |
13203 | if (!abbrev_number) | |
13204 | { | |
13205 | *diep = NULL; | |
13206 | *has_children = 0; | |
13207 | return info_ptr; | |
13208 | } | |
13209 | ||
433df2d4 | 13210 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 13211 | if (!abbrev) |
348e048f DE |
13212 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
13213 | abbrev_number, | |
13214 | bfd_get_filename (abfd)); | |
13215 | ||
3019eac3 | 13216 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
13217 | die->offset = offset; |
13218 | die->tag = abbrev->tag; | |
13219 | die->abbrev = abbrev_number; | |
13220 | ||
3019eac3 DE |
13221 | /* Make the result usable. |
13222 | The caller needs to update num_attrs after adding the extra | |
13223 | attributes. */ | |
93311388 DE |
13224 | die->num_attrs = abbrev->num_attrs; |
13225 | ||
13226 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
13227 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
13228 | info_ptr); | |
93311388 DE |
13229 | |
13230 | *diep = die; | |
13231 | *has_children = abbrev->has_children; | |
13232 | return info_ptr; | |
13233 | } | |
13234 | ||
3019eac3 DE |
13235 | /* Read a die and all its attributes. |
13236 | Set DIEP to point to a newly allocated die with its information, | |
13237 | except for its child, sibling, and parent fields. | |
13238 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
13239 | ||
d521ce57 | 13240 | static const gdb_byte * |
3019eac3 | 13241 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 13242 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
13243 | int *has_children) |
13244 | { | |
d521ce57 | 13245 | const gdb_byte *result; |
bf6af496 DE |
13246 | |
13247 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
13248 | ||
13249 | if (dwarf2_die_debug) | |
13250 | { | |
13251 | fprintf_unfiltered (gdb_stdlog, | |
13252 | "Read die from %s@0x%x of %s:\n", | |
13253 | bfd_section_name (reader->abfd, | |
13254 | reader->die_section->asection), | |
13255 | (unsigned) (info_ptr - reader->die_section->buffer), | |
13256 | bfd_get_filename (reader->abfd)); | |
13257 | dump_die (*diep, dwarf2_die_debug); | |
13258 | } | |
13259 | ||
13260 | return result; | |
3019eac3 | 13261 | } |
433df2d4 DE |
13262 | \f |
13263 | /* Abbreviation tables. | |
3019eac3 | 13264 | |
433df2d4 | 13265 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
13266 | stored in a separate .debug_abbrev section. Before we read any |
13267 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
13268 | in a hash table. */ |
13269 | ||
13270 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
13271 | ||
13272 | static struct abbrev_info * | |
13273 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
13274 | { | |
13275 | struct abbrev_info *abbrev; | |
13276 | ||
13277 | abbrev = (struct abbrev_info *) | |
13278 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
13279 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
13280 | return abbrev; | |
13281 | } | |
13282 | ||
13283 | /* Add an abbreviation to the table. */ | |
c906108c SS |
13284 | |
13285 | static void | |
433df2d4 DE |
13286 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
13287 | unsigned int abbrev_number, | |
13288 | struct abbrev_info *abbrev) | |
13289 | { | |
13290 | unsigned int hash_number; | |
13291 | ||
13292 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
13293 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
13294 | abbrev_table->abbrevs[hash_number] = abbrev; | |
13295 | } | |
dee91e82 | 13296 | |
433df2d4 DE |
13297 | /* Look up an abbrev in the table. |
13298 | Returns NULL if the abbrev is not found. */ | |
13299 | ||
13300 | static struct abbrev_info * | |
13301 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
13302 | unsigned int abbrev_number) | |
c906108c | 13303 | { |
433df2d4 DE |
13304 | unsigned int hash_number; |
13305 | struct abbrev_info *abbrev; | |
13306 | ||
13307 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
13308 | abbrev = abbrev_table->abbrevs[hash_number]; | |
13309 | ||
13310 | while (abbrev) | |
13311 | { | |
13312 | if (abbrev->number == abbrev_number) | |
13313 | return abbrev; | |
13314 | abbrev = abbrev->next; | |
13315 | } | |
13316 | return NULL; | |
13317 | } | |
13318 | ||
13319 | /* Read in an abbrev table. */ | |
13320 | ||
13321 | static struct abbrev_table * | |
13322 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
13323 | sect_offset offset) | |
13324 | { | |
13325 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13326 | bfd *abfd = section->asection->owner; | |
13327 | struct abbrev_table *abbrev_table; | |
d521ce57 | 13328 | const gdb_byte *abbrev_ptr; |
c906108c SS |
13329 | struct abbrev_info *cur_abbrev; |
13330 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 13331 | unsigned int abbrev_form; |
f3dd6933 DJ |
13332 | struct attr_abbrev *cur_attrs; |
13333 | unsigned int allocated_attrs; | |
c906108c | 13334 | |
433df2d4 | 13335 | abbrev_table = XMALLOC (struct abbrev_table); |
f4dc4d17 | 13336 | abbrev_table->offset = offset; |
433df2d4 DE |
13337 | obstack_init (&abbrev_table->abbrev_obstack); |
13338 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
13339 | (ABBREV_HASH_SIZE | |
13340 | * sizeof (struct abbrev_info *))); | |
13341 | memset (abbrev_table->abbrevs, 0, | |
13342 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 13343 | |
433df2d4 DE |
13344 | dwarf2_read_section (objfile, section); |
13345 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
13346 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13347 | abbrev_ptr += bytes_read; | |
13348 | ||
f3dd6933 DJ |
13349 | allocated_attrs = ATTR_ALLOC_CHUNK; |
13350 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 13351 | |
0963b4bd | 13352 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
13353 | while (abbrev_number) |
13354 | { | |
433df2d4 | 13355 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
13356 | |
13357 | /* read in abbrev header */ | |
13358 | cur_abbrev->number = abbrev_number; | |
13359 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13360 | abbrev_ptr += bytes_read; | |
13361 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
13362 | abbrev_ptr += 1; | |
13363 | ||
13364 | /* now read in declarations */ | |
13365 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13366 | abbrev_ptr += bytes_read; | |
13367 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13368 | abbrev_ptr += bytes_read; | |
13369 | while (abbrev_name) | |
13370 | { | |
f3dd6933 | 13371 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 13372 | { |
f3dd6933 DJ |
13373 | allocated_attrs += ATTR_ALLOC_CHUNK; |
13374 | cur_attrs | |
13375 | = xrealloc (cur_attrs, (allocated_attrs | |
13376 | * sizeof (struct attr_abbrev))); | |
c906108c | 13377 | } |
ae038cb0 | 13378 | |
f3dd6933 DJ |
13379 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
13380 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
13381 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13382 | abbrev_ptr += bytes_read; | |
13383 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13384 | abbrev_ptr += bytes_read; | |
13385 | } | |
13386 | ||
433df2d4 | 13387 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
13388 | (cur_abbrev->num_attrs |
13389 | * sizeof (struct attr_abbrev))); | |
13390 | memcpy (cur_abbrev->attrs, cur_attrs, | |
13391 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
13392 | ||
433df2d4 | 13393 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
13394 | |
13395 | /* Get next abbreviation. | |
13396 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
13397 | always properly terminated with an abbrev number of 0. |
13398 | Exit loop if we encounter an abbreviation which we have | |
13399 | already read (which means we are about to read the abbreviations | |
13400 | for the next compile unit) or if the end of the abbreviation | |
13401 | table is reached. */ | |
433df2d4 | 13402 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
13403 | break; |
13404 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13405 | abbrev_ptr += bytes_read; | |
433df2d4 | 13406 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
13407 | break; |
13408 | } | |
f3dd6933 DJ |
13409 | |
13410 | xfree (cur_attrs); | |
433df2d4 | 13411 | return abbrev_table; |
c906108c SS |
13412 | } |
13413 | ||
433df2d4 | 13414 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 13415 | |
c906108c | 13416 | static void |
433df2d4 | 13417 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 13418 | { |
433df2d4 DE |
13419 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
13420 | xfree (abbrev_table); | |
c906108c SS |
13421 | } |
13422 | ||
f4dc4d17 DE |
13423 | /* Same as abbrev_table_free but as a cleanup. |
13424 | We pass in a pointer to the pointer to the table so that we can | |
13425 | set the pointer to NULL when we're done. It also simplifies | |
13426 | build_type_unit_groups. */ | |
13427 | ||
13428 | static void | |
13429 | abbrev_table_free_cleanup (void *table_ptr) | |
13430 | { | |
13431 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
13432 | ||
13433 | if (*abbrev_table_ptr != NULL) | |
13434 | abbrev_table_free (*abbrev_table_ptr); | |
13435 | *abbrev_table_ptr = NULL; | |
13436 | } | |
13437 | ||
433df2d4 DE |
13438 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
13439 | ||
13440 | static void | |
13441 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
13442 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 13443 | { |
433df2d4 DE |
13444 | cu->abbrev_table = |
13445 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
13446 | } | |
c906108c | 13447 | |
433df2d4 | 13448 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 13449 | |
433df2d4 DE |
13450 | static void |
13451 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
13452 | { | |
13453 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 13454 | |
433df2d4 DE |
13455 | abbrev_table_free (cu->abbrev_table); |
13456 | /* Set this to NULL so that we SEGV if we try to read it later, | |
13457 | and also because free_comp_unit verifies this is NULL. */ | |
13458 | cu->abbrev_table = NULL; | |
13459 | } | |
13460 | \f | |
72bf9492 DJ |
13461 | /* Returns nonzero if TAG represents a type that we might generate a partial |
13462 | symbol for. */ | |
13463 | ||
13464 | static int | |
13465 | is_type_tag_for_partial (int tag) | |
13466 | { | |
13467 | switch (tag) | |
13468 | { | |
13469 | #if 0 | |
13470 | /* Some types that would be reasonable to generate partial symbols for, | |
13471 | that we don't at present. */ | |
13472 | case DW_TAG_array_type: | |
13473 | case DW_TAG_file_type: | |
13474 | case DW_TAG_ptr_to_member_type: | |
13475 | case DW_TAG_set_type: | |
13476 | case DW_TAG_string_type: | |
13477 | case DW_TAG_subroutine_type: | |
13478 | #endif | |
13479 | case DW_TAG_base_type: | |
13480 | case DW_TAG_class_type: | |
680b30c7 | 13481 | case DW_TAG_interface_type: |
72bf9492 DJ |
13482 | case DW_TAG_enumeration_type: |
13483 | case DW_TAG_structure_type: | |
13484 | case DW_TAG_subrange_type: | |
13485 | case DW_TAG_typedef: | |
13486 | case DW_TAG_union_type: | |
13487 | return 1; | |
13488 | default: | |
13489 | return 0; | |
13490 | } | |
13491 | } | |
13492 | ||
13493 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
13494 | ||
13495 | static struct partial_die_info * | |
dee91e82 | 13496 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 13497 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 13498 | { |
dee91e82 | 13499 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13500 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
13501 | struct partial_die_info *part_die; |
13502 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
13503 | struct abbrev_info *abbrev; | |
13504 | unsigned int bytes_read; | |
5afb4e99 | 13505 | unsigned int load_all = 0; |
72bf9492 DJ |
13506 | int nesting_level = 1; |
13507 | ||
13508 | parent_die = NULL; | |
13509 | last_die = NULL; | |
13510 | ||
7adf1e79 DE |
13511 | gdb_assert (cu->per_cu != NULL); |
13512 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
13513 | load_all = 1; |
13514 | ||
72bf9492 DJ |
13515 | cu->partial_dies |
13516 | = htab_create_alloc_ex (cu->header.length / 12, | |
13517 | partial_die_hash, | |
13518 | partial_die_eq, | |
13519 | NULL, | |
13520 | &cu->comp_unit_obstack, | |
13521 | hashtab_obstack_allocate, | |
13522 | dummy_obstack_deallocate); | |
13523 | ||
13524 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13525 | sizeof (struct partial_die_info)); | |
13526 | ||
13527 | while (1) | |
13528 | { | |
13529 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
13530 | ||
13531 | /* A NULL abbrev means the end of a series of children. */ | |
13532 | if (abbrev == NULL) | |
13533 | { | |
13534 | if (--nesting_level == 0) | |
13535 | { | |
13536 | /* PART_DIE was probably the last thing allocated on the | |
13537 | comp_unit_obstack, so we could call obstack_free | |
13538 | here. We don't do that because the waste is small, | |
13539 | and will be cleaned up when we're done with this | |
13540 | compilation unit. This way, we're also more robust | |
13541 | against other users of the comp_unit_obstack. */ | |
13542 | return first_die; | |
13543 | } | |
13544 | info_ptr += bytes_read; | |
13545 | last_die = parent_die; | |
13546 | parent_die = parent_die->die_parent; | |
13547 | continue; | |
13548 | } | |
13549 | ||
98bfdba5 PA |
13550 | /* Check for template arguments. We never save these; if |
13551 | they're seen, we just mark the parent, and go on our way. */ | |
13552 | if (parent_die != NULL | |
13553 | && cu->language == language_cplus | |
13554 | && (abbrev->tag == DW_TAG_template_type_param | |
13555 | || abbrev->tag == DW_TAG_template_value_param)) | |
13556 | { | |
13557 | parent_die->has_template_arguments = 1; | |
13558 | ||
13559 | if (!load_all) | |
13560 | { | |
13561 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 13562 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13563 | continue; |
13564 | } | |
13565 | } | |
13566 | ||
0d99eb77 | 13567 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
13568 | Skip their other children. */ |
13569 | if (!load_all | |
13570 | && cu->language == language_cplus | |
13571 | && parent_die != NULL | |
13572 | && parent_die->tag == DW_TAG_subprogram) | |
13573 | { | |
dee91e82 | 13574 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13575 | continue; |
13576 | } | |
13577 | ||
5afb4e99 DJ |
13578 | /* Check whether this DIE is interesting enough to save. Normally |
13579 | we would not be interested in members here, but there may be | |
13580 | later variables referencing them via DW_AT_specification (for | |
13581 | static members). */ | |
13582 | if (!load_all | |
13583 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 13584 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
13585 | && abbrev->tag != DW_TAG_enumerator |
13586 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 13587 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 13588 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 13589 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 13590 | && abbrev->tag != DW_TAG_module |
95554aad TT |
13591 | && abbrev->tag != DW_TAG_member |
13592 | && abbrev->tag != DW_TAG_imported_unit) | |
72bf9492 DJ |
13593 | { |
13594 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13595 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
13596 | continue; |
13597 | } | |
13598 | ||
dee91e82 DE |
13599 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
13600 | info_ptr); | |
72bf9492 DJ |
13601 | |
13602 | /* This two-pass algorithm for processing partial symbols has a | |
13603 | high cost in cache pressure. Thus, handle some simple cases | |
13604 | here which cover the majority of C partial symbols. DIEs | |
13605 | which neither have specification tags in them, nor could have | |
13606 | specification tags elsewhere pointing at them, can simply be | |
13607 | processed and discarded. | |
13608 | ||
13609 | This segment is also optional; scan_partial_symbols and | |
13610 | add_partial_symbol will handle these DIEs if we chain | |
13611 | them in normally. When compilers which do not emit large | |
13612 | quantities of duplicate debug information are more common, | |
13613 | this code can probably be removed. */ | |
13614 | ||
13615 | /* Any complete simple types at the top level (pretty much all | |
13616 | of them, for a language without namespaces), can be processed | |
13617 | directly. */ | |
13618 | if (parent_die == NULL | |
13619 | && part_die->has_specification == 0 | |
13620 | && part_die->is_declaration == 0 | |
d8228535 | 13621 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
13622 | || part_die->tag == DW_TAG_base_type |
13623 | || part_die->tag == DW_TAG_subrange_type)) | |
13624 | { | |
13625 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 13626 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13627 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
13628 | &objfile->static_psymbols, |
13629 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 13630 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13631 | continue; |
13632 | } | |
13633 | ||
d8228535 JK |
13634 | /* The exception for DW_TAG_typedef with has_children above is |
13635 | a workaround of GCC PR debug/47510. In the case of this complaint | |
13636 | type_name_no_tag_or_error will error on such types later. | |
13637 | ||
13638 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
13639 | it could not find the child DIEs referenced later, this is checked | |
13640 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
13641 | ||
13642 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
13643 | complaint (&symfile_complaints, | |
13644 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
13645 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 13646 | part_die->offset.sect_off, objfile->name); |
d8228535 | 13647 | |
72bf9492 DJ |
13648 | /* If we're at the second level, and we're an enumerator, and |
13649 | our parent has no specification (meaning possibly lives in a | |
13650 | namespace elsewhere), then we can add the partial symbol now | |
13651 | instead of queueing it. */ | |
13652 | if (part_die->tag == DW_TAG_enumerator | |
13653 | && parent_die != NULL | |
13654 | && parent_die->die_parent == NULL | |
13655 | && parent_die->tag == DW_TAG_enumeration_type | |
13656 | && parent_die->has_specification == 0) | |
13657 | { | |
13658 | if (part_die->name == NULL) | |
3e43a32a MS |
13659 | complaint (&symfile_complaints, |
13660 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 13661 | else if (building_psymtab) |
04a679b8 | 13662 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13663 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
13664 | (cu->language == language_cplus |
13665 | || cu->language == language_java) | |
bb5ed363 DE |
13666 | ? &objfile->global_psymbols |
13667 | : &objfile->static_psymbols, | |
13668 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 13669 | |
dee91e82 | 13670 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13671 | continue; |
13672 | } | |
13673 | ||
13674 | /* We'll save this DIE so link it in. */ | |
13675 | part_die->die_parent = parent_die; | |
13676 | part_die->die_sibling = NULL; | |
13677 | part_die->die_child = NULL; | |
13678 | ||
13679 | if (last_die && last_die == parent_die) | |
13680 | last_die->die_child = part_die; | |
13681 | else if (last_die) | |
13682 | last_die->die_sibling = part_die; | |
13683 | ||
13684 | last_die = part_die; | |
13685 | ||
13686 | if (first_die == NULL) | |
13687 | first_die = part_die; | |
13688 | ||
13689 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
13690 | find interesting need to be in the hash table, because we | |
13691 | also have the parent/sibling/child chains; only those that we | |
13692 | might refer to by offset later during partial symbol reading. | |
13693 | ||
13694 | For now this means things that might have be the target of a | |
13695 | DW_AT_specification, DW_AT_abstract_origin, or | |
13696 | DW_AT_extension. DW_AT_extension will refer only to | |
13697 | namespaces; DW_AT_abstract_origin refers to functions (and | |
13698 | many things under the function DIE, but we do not recurse | |
13699 | into function DIEs during partial symbol reading) and | |
13700 | possibly variables as well; DW_AT_specification refers to | |
13701 | declarations. Declarations ought to have the DW_AT_declaration | |
13702 | flag. It happens that GCC forgets to put it in sometimes, but | |
13703 | only for functions, not for types. | |
13704 | ||
13705 | Adding more things than necessary to the hash table is harmless | |
13706 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
13707 | wasted time in find_partial_die, when we reread the compilation |
13708 | unit with load_all_dies set. */ | |
72bf9492 | 13709 | |
5afb4e99 | 13710 | if (load_all |
72929c62 | 13711 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 13712 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
13713 | || abbrev->tag == DW_TAG_variable |
13714 | || abbrev->tag == DW_TAG_namespace | |
13715 | || part_die->is_declaration) | |
13716 | { | |
13717 | void **slot; | |
13718 | ||
13719 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 13720 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
13721 | *slot = part_die; |
13722 | } | |
13723 | ||
13724 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13725 | sizeof (struct partial_die_info)); | |
13726 | ||
13727 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 13728 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
13729 | languages we have to, so that we can get at method physnames |
13730 | to infer fully qualified class names, for DW_AT_specification, | |
13731 | and for C++ template arguments. For C++, we also look one level | |
13732 | inside functions to find template arguments (if the name of the | |
13733 | function does not already contain the template arguments). | |
bc30ff58 JB |
13734 | |
13735 | For Ada, we need to scan the children of subprograms and lexical | |
13736 | blocks as well because Ada allows the definition of nested | |
13737 | entities that could be interesting for the debugger, such as | |
13738 | nested subprograms for instance. */ | |
72bf9492 | 13739 | if (last_die->has_children |
5afb4e99 DJ |
13740 | && (load_all |
13741 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 13742 | || last_die->tag == DW_TAG_module |
72bf9492 | 13743 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
13744 | || (cu->language == language_cplus |
13745 | && last_die->tag == DW_TAG_subprogram | |
13746 | && (last_die->name == NULL | |
13747 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
13748 | || (cu->language != language_c |
13749 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 13750 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 13751 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
13752 | || last_die->tag == DW_TAG_union_type)) |
13753 | || (cu->language == language_ada | |
13754 | && (last_die->tag == DW_TAG_subprogram | |
13755 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
13756 | { |
13757 | nesting_level++; | |
13758 | parent_die = last_die; | |
13759 | continue; | |
13760 | } | |
13761 | ||
13762 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13763 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
13764 | |
13765 | /* Back to the top, do it again. */ | |
13766 | } | |
13767 | } | |
13768 | ||
c906108c SS |
13769 | /* Read a minimal amount of information into the minimal die structure. */ |
13770 | ||
d521ce57 | 13771 | static const gdb_byte * |
dee91e82 DE |
13772 | read_partial_die (const struct die_reader_specs *reader, |
13773 | struct partial_die_info *part_die, | |
13774 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 13775 | const gdb_byte *info_ptr) |
c906108c | 13776 | { |
dee91e82 | 13777 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13778 | struct objfile *objfile = cu->objfile; |
d521ce57 | 13779 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 13780 | unsigned int i; |
c906108c | 13781 | struct attribute attr; |
c5aa993b | 13782 | int has_low_pc_attr = 0; |
c906108c | 13783 | int has_high_pc_attr = 0; |
91da1414 | 13784 | int high_pc_relative = 0; |
c906108c | 13785 | |
72bf9492 | 13786 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 13787 | |
b64f50a1 | 13788 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
13789 | |
13790 | info_ptr += abbrev_len; | |
13791 | ||
13792 | if (abbrev == NULL) | |
13793 | return info_ptr; | |
13794 | ||
c906108c SS |
13795 | part_die->tag = abbrev->tag; |
13796 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
13797 | |
13798 | for (i = 0; i < abbrev->num_attrs; ++i) | |
13799 | { | |
dee91e82 | 13800 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
13801 | |
13802 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 13803 | partial symbol table. */ |
c906108c SS |
13804 | switch (attr.name) |
13805 | { | |
13806 | case DW_AT_name: | |
71c25dea TT |
13807 | switch (part_die->tag) |
13808 | { | |
13809 | case DW_TAG_compile_unit: | |
95554aad | 13810 | case DW_TAG_partial_unit: |
348e048f | 13811 | case DW_TAG_type_unit: |
71c25dea TT |
13812 | /* Compilation units have a DW_AT_name that is a filename, not |
13813 | a source language identifier. */ | |
13814 | case DW_TAG_enumeration_type: | |
13815 | case DW_TAG_enumerator: | |
13816 | /* These tags always have simple identifiers already; no need | |
13817 | to canonicalize them. */ | |
13818 | part_die->name = DW_STRING (&attr); | |
13819 | break; | |
13820 | default: | |
13821 | part_die->name | |
13822 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
bb5ed363 | 13823 | &objfile->objfile_obstack); |
71c25dea TT |
13824 | break; |
13825 | } | |
c906108c | 13826 | break; |
31ef98ae | 13827 | case DW_AT_linkage_name: |
c906108c | 13828 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
13829 | /* Note that both forms of linkage name might appear. We |
13830 | assume they will be the same, and we only store the last | |
13831 | one we see. */ | |
94af9270 KS |
13832 | if (cu->language == language_ada) |
13833 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 13834 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
13835 | break; |
13836 | case DW_AT_low_pc: | |
13837 | has_low_pc_attr = 1; | |
13838 | part_die->lowpc = DW_ADDR (&attr); | |
13839 | break; | |
13840 | case DW_AT_high_pc: | |
13841 | has_high_pc_attr = 1; | |
3019eac3 DE |
13842 | if (attr.form == DW_FORM_addr |
13843 | || attr.form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
13844 | part_die->highpc = DW_ADDR (&attr); |
13845 | else | |
13846 | { | |
13847 | high_pc_relative = 1; | |
13848 | part_die->highpc = DW_UNSND (&attr); | |
13849 | } | |
c906108c SS |
13850 | break; |
13851 | case DW_AT_location: | |
0963b4bd | 13852 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
13853 | if (attr_form_is_block (&attr)) |
13854 | { | |
95554aad | 13855 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 13856 | } |
3690dd37 | 13857 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 13858 | { |
4d3c2250 | 13859 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13860 | } |
13861 | else | |
13862 | { | |
4d3c2250 KB |
13863 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
13864 | "partial symbol information"); | |
8e19ed76 | 13865 | } |
c906108c | 13866 | break; |
c906108c SS |
13867 | case DW_AT_external: |
13868 | part_die->is_external = DW_UNSND (&attr); | |
13869 | break; | |
13870 | case DW_AT_declaration: | |
13871 | part_die->is_declaration = DW_UNSND (&attr); | |
13872 | break; | |
13873 | case DW_AT_type: | |
13874 | part_die->has_type = 1; | |
13875 | break; | |
13876 | case DW_AT_abstract_origin: | |
13877 | case DW_AT_specification: | |
72bf9492 DJ |
13878 | case DW_AT_extension: |
13879 | part_die->has_specification = 1; | |
c764a876 | 13880 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
13881 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
13882 | || cu->per_cu->is_dwz); | |
c906108c SS |
13883 | break; |
13884 | case DW_AT_sibling: | |
13885 | /* Ignore absolute siblings, they might point outside of | |
13886 | the current compile unit. */ | |
13887 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
13888 | complaint (&symfile_complaints, |
13889 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 13890 | else |
b64f50a1 | 13891 | part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
c906108c | 13892 | break; |
fa4028e9 JB |
13893 | case DW_AT_byte_size: |
13894 | part_die->has_byte_size = 1; | |
13895 | break; | |
68511cec CES |
13896 | case DW_AT_calling_convention: |
13897 | /* DWARF doesn't provide a way to identify a program's source-level | |
13898 | entry point. DW_AT_calling_convention attributes are only meant | |
13899 | to describe functions' calling conventions. | |
13900 | ||
13901 | However, because it's a necessary piece of information in | |
13902 | Fortran, and because DW_CC_program is the only piece of debugging | |
13903 | information whose definition refers to a 'main program' at all, | |
13904 | several compilers have begun marking Fortran main programs with | |
13905 | DW_CC_program --- even when those functions use the standard | |
13906 | calling conventions. | |
13907 | ||
13908 | So until DWARF specifies a way to provide this information and | |
13909 | compilers pick up the new representation, we'll support this | |
13910 | practice. */ | |
13911 | if (DW_UNSND (&attr) == DW_CC_program | |
13912 | && cu->language == language_fortran) | |
01f8c46d JK |
13913 | { |
13914 | set_main_name (part_die->name); | |
13915 | ||
13916 | /* As this DIE has a static linkage the name would be difficult | |
13917 | to look up later. */ | |
13918 | language_of_main = language_fortran; | |
13919 | } | |
68511cec | 13920 | break; |
481860b3 GB |
13921 | case DW_AT_inline: |
13922 | if (DW_UNSND (&attr) == DW_INL_inlined | |
13923 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
13924 | part_die->may_be_inlined = 1; | |
13925 | break; | |
95554aad TT |
13926 | |
13927 | case DW_AT_import: | |
13928 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
13929 | { |
13930 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
13931 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
13932 | || cu->per_cu->is_dwz); | |
13933 | } | |
95554aad TT |
13934 | break; |
13935 | ||
c906108c SS |
13936 | default: |
13937 | break; | |
13938 | } | |
13939 | } | |
13940 | ||
91da1414 MW |
13941 | if (high_pc_relative) |
13942 | part_die->highpc += part_die->lowpc; | |
13943 | ||
9373cf26 JK |
13944 | if (has_low_pc_attr && has_high_pc_attr) |
13945 | { | |
13946 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13947 | eliminate duplicate copies of functions and vtables and such. | |
13948 | The linker will arbitrarily choose one and discard the others. | |
13949 | The AT_*_pc values for such functions refer to local labels in | |
13950 | these sections. If the section from that file was discarded, the | |
13951 | labels are not in the output, so the relocs get a value of 0. | |
13952 | If this is a discarded function, mark the pc bounds as invalid, | |
13953 | so that GDB will ignore it. */ | |
13954 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
13955 | { | |
bb5ed363 | 13956 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13957 | |
13958 | complaint (&symfile_complaints, | |
13959 | _("DW_AT_low_pc %s is zero " | |
13960 | "for DIE at 0x%x [in module %s]"), | |
13961 | paddress (gdbarch, part_die->lowpc), | |
b64f50a1 | 13962 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13963 | } |
13964 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
13965 | else if (part_die->lowpc >= part_die->highpc) | |
13966 | { | |
bb5ed363 | 13967 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13968 | |
13969 | complaint (&symfile_complaints, | |
13970 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
13971 | "for DIE at 0x%x [in module %s]"), | |
13972 | paddress (gdbarch, part_die->lowpc), | |
13973 | paddress (gdbarch, part_die->highpc), | |
b64f50a1 | 13974 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13975 | } |
13976 | else | |
13977 | part_die->has_pc_info = 1; | |
13978 | } | |
85cbf3d3 | 13979 | |
c906108c SS |
13980 | return info_ptr; |
13981 | } | |
13982 | ||
72bf9492 DJ |
13983 | /* Find a cached partial DIE at OFFSET in CU. */ |
13984 | ||
13985 | static struct partial_die_info * | |
b64f50a1 | 13986 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
13987 | { |
13988 | struct partial_die_info *lookup_die = NULL; | |
13989 | struct partial_die_info part_die; | |
13990 | ||
13991 | part_die.offset = offset; | |
b64f50a1 JK |
13992 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
13993 | offset.sect_off); | |
72bf9492 | 13994 | |
72bf9492 DJ |
13995 | return lookup_die; |
13996 | } | |
13997 | ||
348e048f DE |
13998 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
13999 | except in the case of .debug_types DIEs which do not reference | |
14000 | outside their CU (they do however referencing other types via | |
55f1336d | 14001 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
14002 | |
14003 | static struct partial_die_info * | |
36586728 | 14004 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 14005 | { |
bb5ed363 | 14006 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
14007 | struct dwarf2_per_cu_data *per_cu = NULL; |
14008 | struct partial_die_info *pd = NULL; | |
72bf9492 | 14009 | |
36586728 TT |
14010 | if (offset_in_dwz == cu->per_cu->is_dwz |
14011 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
14012 | { |
14013 | pd = find_partial_die_in_comp_unit (offset, cu); | |
14014 | if (pd != NULL) | |
14015 | return pd; | |
0d99eb77 DE |
14016 | /* We missed recording what we needed. |
14017 | Load all dies and try again. */ | |
14018 | per_cu = cu->per_cu; | |
5afb4e99 | 14019 | } |
0d99eb77 DE |
14020 | else |
14021 | { | |
14022 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 14023 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
14024 | { |
14025 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
14026 | " external reference to offset 0x%lx [in module %s].\n"), | |
14027 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
14028 | bfd_get_filename (objfile->obfd)); | |
14029 | } | |
36586728 TT |
14030 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
14031 | objfile); | |
72bf9492 | 14032 | |
0d99eb77 DE |
14033 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
14034 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 14035 | |
0d99eb77 DE |
14036 | per_cu->cu->last_used = 0; |
14037 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
14038 | } | |
5afb4e99 | 14039 | |
dee91e82 DE |
14040 | /* If we didn't find it, and not all dies have been loaded, |
14041 | load them all and try again. */ | |
14042 | ||
5afb4e99 DJ |
14043 | if (pd == NULL && per_cu->load_all_dies == 0) |
14044 | { | |
5afb4e99 | 14045 | per_cu->load_all_dies = 1; |
fd820528 DE |
14046 | |
14047 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
14048 | THIS_CU->cu may already be in use. So we can't just free it and | |
14049 | replace its DIEs with the ones we read in. Instead, we leave those | |
14050 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
14051 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
14052 | set. */ | |
dee91e82 | 14053 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
14054 | |
14055 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
14056 | } | |
14057 | ||
14058 | if (pd == NULL) | |
14059 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
14060 | _("could not find partial DIE 0x%x " |
14061 | "in cache [from module %s]\n"), | |
b64f50a1 | 14062 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 14063 | return pd; |
72bf9492 DJ |
14064 | } |
14065 | ||
abc72ce4 DE |
14066 | /* See if we can figure out if the class lives in a namespace. We do |
14067 | this by looking for a member function; its demangled name will | |
14068 | contain namespace info, if there is any. */ | |
14069 | ||
14070 | static void | |
14071 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
14072 | struct dwarf2_cu *cu) | |
14073 | { | |
14074 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
14075 | what template types look like, because the demangler | |
14076 | frequently doesn't give the same name as the debug info. We | |
14077 | could fix this by only using the demangled name to get the | |
14078 | prefix (but see comment in read_structure_type). */ | |
14079 | ||
14080 | struct partial_die_info *real_pdi; | |
14081 | struct partial_die_info *child_pdi; | |
14082 | ||
14083 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
14084 | we should not do this. We'll prepend the parent's fully qualified | |
14085 | name when we create the partial symbol. */ | |
14086 | ||
14087 | real_pdi = struct_pdi; | |
14088 | while (real_pdi->has_specification) | |
36586728 TT |
14089 | real_pdi = find_partial_die (real_pdi->spec_offset, |
14090 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
14091 | |
14092 | if (real_pdi->die_parent != NULL) | |
14093 | return; | |
14094 | ||
14095 | for (child_pdi = struct_pdi->die_child; | |
14096 | child_pdi != NULL; | |
14097 | child_pdi = child_pdi->die_sibling) | |
14098 | { | |
14099 | if (child_pdi->tag == DW_TAG_subprogram | |
14100 | && child_pdi->linkage_name != NULL) | |
14101 | { | |
14102 | char *actual_class_name | |
14103 | = language_class_name_from_physname (cu->language_defn, | |
14104 | child_pdi->linkage_name); | |
14105 | if (actual_class_name != NULL) | |
14106 | { | |
14107 | struct_pdi->name | |
10f0c4bb TT |
14108 | = obstack_copy0 (&cu->objfile->objfile_obstack, |
14109 | actual_class_name, | |
14110 | strlen (actual_class_name)); | |
abc72ce4 DE |
14111 | xfree (actual_class_name); |
14112 | } | |
14113 | break; | |
14114 | } | |
14115 | } | |
14116 | } | |
14117 | ||
72bf9492 DJ |
14118 | /* Adjust PART_DIE before generating a symbol for it. This function |
14119 | may set the is_external flag or change the DIE's name. */ | |
14120 | ||
14121 | static void | |
14122 | fixup_partial_die (struct partial_die_info *part_die, | |
14123 | struct dwarf2_cu *cu) | |
14124 | { | |
abc72ce4 DE |
14125 | /* Once we've fixed up a die, there's no point in doing so again. |
14126 | This also avoids a memory leak if we were to call | |
14127 | guess_partial_die_structure_name multiple times. */ | |
14128 | if (part_die->fixup_called) | |
14129 | return; | |
14130 | ||
72bf9492 DJ |
14131 | /* If we found a reference attribute and the DIE has no name, try |
14132 | to find a name in the referred to DIE. */ | |
14133 | ||
14134 | if (part_die->name == NULL && part_die->has_specification) | |
14135 | { | |
14136 | struct partial_die_info *spec_die; | |
72bf9492 | 14137 | |
36586728 TT |
14138 | spec_die = find_partial_die (part_die->spec_offset, |
14139 | part_die->spec_is_dwz, cu); | |
72bf9492 | 14140 | |
10b3939b | 14141 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
14142 | |
14143 | if (spec_die->name) | |
14144 | { | |
14145 | part_die->name = spec_die->name; | |
14146 | ||
14147 | /* Copy DW_AT_external attribute if it is set. */ | |
14148 | if (spec_die->is_external) | |
14149 | part_die->is_external = spec_die->is_external; | |
14150 | } | |
14151 | } | |
14152 | ||
14153 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
14154 | |
14155 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 14156 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 14157 | |
abc72ce4 DE |
14158 | /* If there is no parent die to provide a namespace, and there are |
14159 | children, see if we can determine the namespace from their linkage | |
122d1940 | 14160 | name. */ |
abc72ce4 | 14161 | if (cu->language == language_cplus |
8b70b953 | 14162 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
14163 | && part_die->die_parent == NULL |
14164 | && part_die->has_children | |
14165 | && (part_die->tag == DW_TAG_class_type | |
14166 | || part_die->tag == DW_TAG_structure_type | |
14167 | || part_die->tag == DW_TAG_union_type)) | |
14168 | guess_partial_die_structure_name (part_die, cu); | |
14169 | ||
53832f31 TT |
14170 | /* GCC might emit a nameless struct or union that has a linkage |
14171 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
14172 | if (part_die->name == NULL | |
96408a79 SA |
14173 | && (part_die->tag == DW_TAG_class_type |
14174 | || part_die->tag == DW_TAG_interface_type | |
14175 | || part_die->tag == DW_TAG_structure_type | |
14176 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
14177 | && part_die->linkage_name != NULL) |
14178 | { | |
14179 | char *demangled; | |
14180 | ||
8de20a37 | 14181 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
14182 | if (demangled) |
14183 | { | |
96408a79 SA |
14184 | const char *base; |
14185 | ||
14186 | /* Strip any leading namespaces/classes, keep only the base name. | |
14187 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
14188 | base = strrchr (demangled, ':'); | |
14189 | if (base && base > demangled && base[-1] == ':') | |
14190 | base++; | |
14191 | else | |
14192 | base = demangled; | |
14193 | ||
10f0c4bb TT |
14194 | part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack, |
14195 | base, strlen (base)); | |
53832f31 TT |
14196 | xfree (demangled); |
14197 | } | |
14198 | } | |
14199 | ||
abc72ce4 | 14200 | part_die->fixup_called = 1; |
72bf9492 DJ |
14201 | } |
14202 | ||
a8329558 | 14203 | /* Read an attribute value described by an attribute form. */ |
c906108c | 14204 | |
d521ce57 | 14205 | static const gdb_byte * |
dee91e82 DE |
14206 | read_attribute_value (const struct die_reader_specs *reader, |
14207 | struct attribute *attr, unsigned form, | |
d521ce57 | 14208 | const gdb_byte *info_ptr) |
c906108c | 14209 | { |
dee91e82 DE |
14210 | struct dwarf2_cu *cu = reader->cu; |
14211 | bfd *abfd = reader->abfd; | |
e7c27a73 | 14212 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
14213 | unsigned int bytes_read; |
14214 | struct dwarf_block *blk; | |
14215 | ||
a8329558 KW |
14216 | attr->form = form; |
14217 | switch (form) | |
c906108c | 14218 | { |
c906108c | 14219 | case DW_FORM_ref_addr: |
ae411497 | 14220 | if (cu->header.version == 2) |
4568ecf9 | 14221 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 14222 | else |
4568ecf9 DE |
14223 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
14224 | &cu->header, &bytes_read); | |
ae411497 TT |
14225 | info_ptr += bytes_read; |
14226 | break; | |
36586728 TT |
14227 | case DW_FORM_GNU_ref_alt: |
14228 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
14229 | info_ptr += bytes_read; | |
14230 | break; | |
ae411497 | 14231 | case DW_FORM_addr: |
e7c27a73 | 14232 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 14233 | info_ptr += bytes_read; |
c906108c SS |
14234 | break; |
14235 | case DW_FORM_block2: | |
7b5a2f43 | 14236 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14237 | blk->size = read_2_bytes (abfd, info_ptr); |
14238 | info_ptr += 2; | |
14239 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14240 | info_ptr += blk->size; | |
14241 | DW_BLOCK (attr) = blk; | |
14242 | break; | |
14243 | case DW_FORM_block4: | |
7b5a2f43 | 14244 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14245 | blk->size = read_4_bytes (abfd, info_ptr); |
14246 | info_ptr += 4; | |
14247 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14248 | info_ptr += blk->size; | |
14249 | DW_BLOCK (attr) = blk; | |
14250 | break; | |
14251 | case DW_FORM_data2: | |
14252 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
14253 | info_ptr += 2; | |
14254 | break; | |
14255 | case DW_FORM_data4: | |
14256 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
14257 | info_ptr += 4; | |
14258 | break; | |
14259 | case DW_FORM_data8: | |
14260 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
14261 | info_ptr += 8; | |
14262 | break; | |
2dc7f7b3 TT |
14263 | case DW_FORM_sec_offset: |
14264 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
14265 | info_ptr += bytes_read; | |
14266 | break; | |
c906108c | 14267 | case DW_FORM_string: |
9b1c24c8 | 14268 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 14269 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
14270 | info_ptr += bytes_read; |
14271 | break; | |
4bdf3d34 | 14272 | case DW_FORM_strp: |
36586728 TT |
14273 | if (!cu->per_cu->is_dwz) |
14274 | { | |
14275 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
14276 | &bytes_read); | |
14277 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14278 | info_ptr += bytes_read; | |
14279 | break; | |
14280 | } | |
14281 | /* FALLTHROUGH */ | |
14282 | case DW_FORM_GNU_strp_alt: | |
14283 | { | |
14284 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
14285 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
14286 | &bytes_read); | |
14287 | ||
14288 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
14289 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14290 | info_ptr += bytes_read; | |
14291 | } | |
4bdf3d34 | 14292 | break; |
2dc7f7b3 | 14293 | case DW_FORM_exprloc: |
c906108c | 14294 | case DW_FORM_block: |
7b5a2f43 | 14295 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14296 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14297 | info_ptr += bytes_read; | |
14298 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14299 | info_ptr += blk->size; | |
14300 | DW_BLOCK (attr) = blk; | |
14301 | break; | |
14302 | case DW_FORM_block1: | |
7b5a2f43 | 14303 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14304 | blk->size = read_1_byte (abfd, info_ptr); |
14305 | info_ptr += 1; | |
14306 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14307 | info_ptr += blk->size; | |
14308 | DW_BLOCK (attr) = blk; | |
14309 | break; | |
14310 | case DW_FORM_data1: | |
14311 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
14312 | info_ptr += 1; | |
14313 | break; | |
14314 | case DW_FORM_flag: | |
14315 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
14316 | info_ptr += 1; | |
14317 | break; | |
2dc7f7b3 TT |
14318 | case DW_FORM_flag_present: |
14319 | DW_UNSND (attr) = 1; | |
14320 | break; | |
c906108c SS |
14321 | case DW_FORM_sdata: |
14322 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
14323 | info_ptr += bytes_read; | |
14324 | break; | |
14325 | case DW_FORM_udata: | |
14326 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14327 | info_ptr += bytes_read; | |
14328 | break; | |
14329 | case DW_FORM_ref1: | |
4568ecf9 DE |
14330 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14331 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
14332 | info_ptr += 1; |
14333 | break; | |
14334 | case DW_FORM_ref2: | |
4568ecf9 DE |
14335 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14336 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
14337 | info_ptr += 2; |
14338 | break; | |
14339 | case DW_FORM_ref4: | |
4568ecf9 DE |
14340 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14341 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
14342 | info_ptr += 4; |
14343 | break; | |
613e1657 | 14344 | case DW_FORM_ref8: |
4568ecf9 DE |
14345 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14346 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
14347 | info_ptr += 8; |
14348 | break; | |
55f1336d | 14349 | case DW_FORM_ref_sig8: |
ac9ec31b | 14350 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
14351 | info_ptr += 8; |
14352 | break; | |
c906108c | 14353 | case DW_FORM_ref_udata: |
4568ecf9 DE |
14354 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14355 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
14356 | info_ptr += bytes_read; |
14357 | break; | |
c906108c | 14358 | case DW_FORM_indirect: |
a8329558 KW |
14359 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14360 | info_ptr += bytes_read; | |
dee91e82 | 14361 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 14362 | break; |
3019eac3 DE |
14363 | case DW_FORM_GNU_addr_index: |
14364 | if (reader->dwo_file == NULL) | |
14365 | { | |
14366 | /* For now flag a hard error. | |
14367 | Later we can turn this into a complaint. */ | |
14368 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14369 | dwarf_form_name (form), | |
14370 | bfd_get_filename (abfd)); | |
14371 | } | |
14372 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
14373 | info_ptr += bytes_read; | |
14374 | break; | |
14375 | case DW_FORM_GNU_str_index: | |
14376 | if (reader->dwo_file == NULL) | |
14377 | { | |
14378 | /* For now flag a hard error. | |
14379 | Later we can turn this into a complaint if warranted. */ | |
14380 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14381 | dwarf_form_name (form), | |
14382 | bfd_get_filename (abfd)); | |
14383 | } | |
14384 | { | |
14385 | ULONGEST str_index = | |
14386 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14387 | ||
14388 | DW_STRING (attr) = read_str_index (reader, cu, str_index); | |
14389 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14390 | info_ptr += bytes_read; | |
14391 | } | |
14392 | break; | |
c906108c | 14393 | default: |
8a3fe4f8 | 14394 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
14395 | dwarf_form_name (form), |
14396 | bfd_get_filename (abfd)); | |
c906108c | 14397 | } |
28e94949 | 14398 | |
36586728 TT |
14399 | /* Super hack. */ |
14400 | if (cu->per_cu->is_dwz && is_ref_attr (attr)) | |
14401 | attr->form = DW_FORM_GNU_ref_alt; | |
14402 | ||
28e94949 JB |
14403 | /* We have seen instances where the compiler tried to emit a byte |
14404 | size attribute of -1 which ended up being encoded as an unsigned | |
14405 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
14406 | an object of this size seems pretty unlikely so we can relatively | |
14407 | safely treat these cases as if the size attribute was invalid and | |
14408 | treat them as zero by default. */ | |
14409 | if (attr->name == DW_AT_byte_size | |
14410 | && form == DW_FORM_data4 | |
14411 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
14412 | { |
14413 | complaint | |
14414 | (&symfile_complaints, | |
43bbcdc2 PH |
14415 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
14416 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
14417 | DW_UNSND (attr) = 0; |
14418 | } | |
28e94949 | 14419 | |
c906108c SS |
14420 | return info_ptr; |
14421 | } | |
14422 | ||
a8329558 KW |
14423 | /* Read an attribute described by an abbreviated attribute. */ |
14424 | ||
d521ce57 | 14425 | static const gdb_byte * |
dee91e82 DE |
14426 | read_attribute (const struct die_reader_specs *reader, |
14427 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 14428 | const gdb_byte *info_ptr) |
a8329558 KW |
14429 | { |
14430 | attr->name = abbrev->name; | |
dee91e82 | 14431 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
14432 | } |
14433 | ||
0963b4bd | 14434 | /* Read dwarf information from a buffer. */ |
c906108c SS |
14435 | |
14436 | static unsigned int | |
a1855c1d | 14437 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14438 | { |
fe1b8b76 | 14439 | return bfd_get_8 (abfd, buf); |
c906108c SS |
14440 | } |
14441 | ||
14442 | static int | |
a1855c1d | 14443 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14444 | { |
fe1b8b76 | 14445 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
14446 | } |
14447 | ||
14448 | static unsigned int | |
a1855c1d | 14449 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14450 | { |
fe1b8b76 | 14451 | return bfd_get_16 (abfd, buf); |
c906108c SS |
14452 | } |
14453 | ||
21ae7a4d | 14454 | static int |
a1855c1d | 14455 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14456 | { |
14457 | return bfd_get_signed_16 (abfd, buf); | |
14458 | } | |
14459 | ||
c906108c | 14460 | static unsigned int |
a1855c1d | 14461 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14462 | { |
fe1b8b76 | 14463 | return bfd_get_32 (abfd, buf); |
c906108c SS |
14464 | } |
14465 | ||
21ae7a4d | 14466 | static int |
a1855c1d | 14467 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14468 | { |
14469 | return bfd_get_signed_32 (abfd, buf); | |
14470 | } | |
14471 | ||
93311388 | 14472 | static ULONGEST |
a1855c1d | 14473 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14474 | { |
fe1b8b76 | 14475 | return bfd_get_64 (abfd, buf); |
c906108c SS |
14476 | } |
14477 | ||
14478 | static CORE_ADDR | |
d521ce57 | 14479 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 14480 | unsigned int *bytes_read) |
c906108c | 14481 | { |
e7c27a73 | 14482 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
14483 | CORE_ADDR retval = 0; |
14484 | ||
107d2387 | 14485 | if (cu_header->signed_addr_p) |
c906108c | 14486 | { |
107d2387 AC |
14487 | switch (cu_header->addr_size) |
14488 | { | |
14489 | case 2: | |
fe1b8b76 | 14490 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
14491 | break; |
14492 | case 4: | |
fe1b8b76 | 14493 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
14494 | break; |
14495 | case 8: | |
fe1b8b76 | 14496 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
14497 | break; |
14498 | default: | |
8e65ff28 | 14499 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 14500 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 14501 | bfd_get_filename (abfd)); |
107d2387 AC |
14502 | } |
14503 | } | |
14504 | else | |
14505 | { | |
14506 | switch (cu_header->addr_size) | |
14507 | { | |
14508 | case 2: | |
fe1b8b76 | 14509 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
14510 | break; |
14511 | case 4: | |
fe1b8b76 | 14512 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
14513 | break; |
14514 | case 8: | |
fe1b8b76 | 14515 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
14516 | break; |
14517 | default: | |
8e65ff28 | 14518 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
14519 | _("read_address: bad switch, " |
14520 | "unsigned [in module %s]"), | |
659b0389 | 14521 | bfd_get_filename (abfd)); |
107d2387 | 14522 | } |
c906108c | 14523 | } |
64367e0a | 14524 | |
107d2387 AC |
14525 | *bytes_read = cu_header->addr_size; |
14526 | return retval; | |
c906108c SS |
14527 | } |
14528 | ||
f7ef9339 | 14529 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
14530 | specification allows the initial length to take up either 4 bytes |
14531 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
14532 | bytes describe the length and all offsets will be 8 bytes in length | |
14533 | instead of 4. | |
14534 | ||
f7ef9339 KB |
14535 | An older, non-standard 64-bit format is also handled by this |
14536 | function. The older format in question stores the initial length | |
14537 | as an 8-byte quantity without an escape value. Lengths greater | |
14538 | than 2^32 aren't very common which means that the initial 4 bytes | |
14539 | is almost always zero. Since a length value of zero doesn't make | |
14540 | sense for the 32-bit format, this initial zero can be considered to | |
14541 | be an escape value which indicates the presence of the older 64-bit | |
14542 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
14543 | greater than 4GB. If it becomes necessary to handle lengths |
14544 | somewhat larger than 4GB, we could allow other small values (such | |
14545 | as the non-sensical values of 1, 2, and 3) to also be used as | |
14546 | escape values indicating the presence of the old format. | |
f7ef9339 | 14547 | |
917c78fc MK |
14548 | The value returned via bytes_read should be used to increment the |
14549 | relevant pointer after calling read_initial_length(). | |
c764a876 | 14550 | |
613e1657 KB |
14551 | [ Note: read_initial_length() and read_offset() are based on the |
14552 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 14553 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
14554 | from: |
14555 | ||
f7ef9339 | 14556 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 14557 | |
613e1657 KB |
14558 | This document is only a draft and is subject to change. (So beware.) |
14559 | ||
f7ef9339 | 14560 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
14561 | determined empirically by examining 64-bit ELF files produced by |
14562 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
14563 | |
14564 | - Kevin, July 16, 2002 | |
613e1657 KB |
14565 | ] */ |
14566 | ||
14567 | static LONGEST | |
d521ce57 | 14568 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 14569 | { |
fe1b8b76 | 14570 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 14571 | |
dd373385 | 14572 | if (length == 0xffffffff) |
613e1657 | 14573 | { |
fe1b8b76 | 14574 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 14575 | *bytes_read = 12; |
613e1657 | 14576 | } |
dd373385 | 14577 | else if (length == 0) |
f7ef9339 | 14578 | { |
dd373385 | 14579 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 14580 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 14581 | *bytes_read = 8; |
f7ef9339 | 14582 | } |
613e1657 KB |
14583 | else |
14584 | { | |
14585 | *bytes_read = 4; | |
613e1657 KB |
14586 | } |
14587 | ||
c764a876 DE |
14588 | return length; |
14589 | } | |
dd373385 | 14590 | |
c764a876 DE |
14591 | /* Cover function for read_initial_length. |
14592 | Returns the length of the object at BUF, and stores the size of the | |
14593 | initial length in *BYTES_READ and stores the size that offsets will be in | |
14594 | *OFFSET_SIZE. | |
14595 | If the initial length size is not equivalent to that specified in | |
14596 | CU_HEADER then issue a complaint. | |
14597 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 14598 | |
c764a876 | 14599 | static LONGEST |
d521ce57 | 14600 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
14601 | const struct comp_unit_head *cu_header, |
14602 | unsigned int *bytes_read, | |
14603 | unsigned int *offset_size) | |
14604 | { | |
14605 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
14606 | ||
14607 | gdb_assert (cu_header->initial_length_size == 4 | |
14608 | || cu_header->initial_length_size == 8 | |
14609 | || cu_header->initial_length_size == 12); | |
14610 | ||
14611 | if (cu_header->initial_length_size != *bytes_read) | |
14612 | complaint (&symfile_complaints, | |
14613 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 14614 | |
c764a876 | 14615 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 14616 | return length; |
613e1657 KB |
14617 | } |
14618 | ||
14619 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 14620 | given by cu_header->offset_size. */ |
613e1657 KB |
14621 | |
14622 | static LONGEST | |
d521ce57 TT |
14623 | read_offset (bfd *abfd, const gdb_byte *buf, |
14624 | const struct comp_unit_head *cu_header, | |
891d2f0b | 14625 | unsigned int *bytes_read) |
c764a876 DE |
14626 | { |
14627 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 14628 | |
c764a876 DE |
14629 | *bytes_read = cu_header->offset_size; |
14630 | return offset; | |
14631 | } | |
14632 | ||
14633 | /* Read an offset from the data stream. */ | |
14634 | ||
14635 | static LONGEST | |
d521ce57 | 14636 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
14637 | { |
14638 | LONGEST retval = 0; | |
14639 | ||
c764a876 | 14640 | switch (offset_size) |
613e1657 KB |
14641 | { |
14642 | case 4: | |
fe1b8b76 | 14643 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
14644 | break; |
14645 | case 8: | |
fe1b8b76 | 14646 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
14647 | break; |
14648 | default: | |
8e65ff28 | 14649 | internal_error (__FILE__, __LINE__, |
c764a876 | 14650 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 14651 | bfd_get_filename (abfd)); |
613e1657 KB |
14652 | } |
14653 | ||
917c78fc | 14654 | return retval; |
613e1657 KB |
14655 | } |
14656 | ||
d521ce57 TT |
14657 | static const gdb_byte * |
14658 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
14659 | { |
14660 | /* If the size of a host char is 8 bits, we can return a pointer | |
14661 | to the buffer, otherwise we have to copy the data to a buffer | |
14662 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14663 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 14664 | return buf; |
c906108c SS |
14665 | } |
14666 | ||
d521ce57 TT |
14667 | static const char * |
14668 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
14669 | unsigned int *bytes_read_ptr) | |
c906108c SS |
14670 | { |
14671 | /* If the size of a host char is 8 bits, we can return a pointer | |
14672 | to the string, otherwise we have to copy the string to a buffer | |
14673 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14674 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
14675 | if (*buf == '\0') |
14676 | { | |
14677 | *bytes_read_ptr = 1; | |
14678 | return NULL; | |
14679 | } | |
d521ce57 TT |
14680 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
14681 | return (const char *) buf; | |
4bdf3d34 JJ |
14682 | } |
14683 | ||
d521ce57 | 14684 | static const char * |
cf2c3c16 | 14685 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 14686 | { |
be391dca | 14687 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 14688 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
14689 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
14690 | bfd_get_filename (abfd)); | |
dce234bc | 14691 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
14692 | error (_("DW_FORM_strp pointing outside of " |
14693 | ".debug_str section [in module %s]"), | |
14694 | bfd_get_filename (abfd)); | |
4bdf3d34 | 14695 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 14696 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 14697 | return NULL; |
d521ce57 | 14698 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
14699 | } |
14700 | ||
36586728 TT |
14701 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
14702 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
14703 | the string consists of a single NUL byte, return NULL; otherwise | |
14704 | return a pointer to the string. */ | |
14705 | ||
d521ce57 | 14706 | static const char * |
36586728 TT |
14707 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
14708 | { | |
14709 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
14710 | ||
14711 | if (dwz->str.buffer == NULL) | |
14712 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
14713 | "section [in module %s]"), | |
14714 | bfd_get_filename (dwz->dwz_bfd)); | |
14715 | if (str_offset >= dwz->str.size) | |
14716 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
14717 | ".debug_str section [in module %s]"), | |
14718 | bfd_get_filename (dwz->dwz_bfd)); | |
14719 | gdb_assert (HOST_CHAR_BIT == 8); | |
14720 | if (dwz->str.buffer[str_offset] == '\0') | |
14721 | return NULL; | |
d521ce57 | 14722 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
14723 | } |
14724 | ||
d521ce57 TT |
14725 | static const char * |
14726 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
14727 | const struct comp_unit_head *cu_header, |
14728 | unsigned int *bytes_read_ptr) | |
14729 | { | |
14730 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
14731 | ||
14732 | return read_indirect_string_at_offset (abfd, str_offset); | |
14733 | } | |
14734 | ||
12df843f | 14735 | static ULONGEST |
d521ce57 TT |
14736 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
14737 | unsigned int *bytes_read_ptr) | |
c906108c | 14738 | { |
12df843f | 14739 | ULONGEST result; |
ce5d95e1 | 14740 | unsigned int num_read; |
c906108c SS |
14741 | int i, shift; |
14742 | unsigned char byte; | |
14743 | ||
14744 | result = 0; | |
14745 | shift = 0; | |
14746 | num_read = 0; | |
14747 | i = 0; | |
14748 | while (1) | |
14749 | { | |
fe1b8b76 | 14750 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14751 | buf++; |
14752 | num_read++; | |
12df843f | 14753 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
14754 | if ((byte & 128) == 0) |
14755 | { | |
14756 | break; | |
14757 | } | |
14758 | shift += 7; | |
14759 | } | |
14760 | *bytes_read_ptr = num_read; | |
14761 | return result; | |
14762 | } | |
14763 | ||
12df843f | 14764 | static LONGEST |
d521ce57 TT |
14765 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
14766 | unsigned int *bytes_read_ptr) | |
c906108c | 14767 | { |
12df843f | 14768 | LONGEST result; |
77e0b926 | 14769 | int i, shift, num_read; |
c906108c SS |
14770 | unsigned char byte; |
14771 | ||
14772 | result = 0; | |
14773 | shift = 0; | |
c906108c SS |
14774 | num_read = 0; |
14775 | i = 0; | |
14776 | while (1) | |
14777 | { | |
fe1b8b76 | 14778 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14779 | buf++; |
14780 | num_read++; | |
12df843f | 14781 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
14782 | shift += 7; |
14783 | if ((byte & 128) == 0) | |
14784 | { | |
14785 | break; | |
14786 | } | |
14787 | } | |
77e0b926 | 14788 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 14789 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
14790 | *bytes_read_ptr = num_read; |
14791 | return result; | |
14792 | } | |
14793 | ||
3019eac3 DE |
14794 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
14795 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
14796 | ADDR_SIZE is the size of addresses from the CU header. */ | |
14797 | ||
14798 | static CORE_ADDR | |
14799 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
14800 | { | |
14801 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14802 | bfd *abfd = objfile->obfd; | |
14803 | const gdb_byte *info_ptr; | |
14804 | ||
14805 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
14806 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
14807 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
14808 | objfile->name); | |
14809 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) | |
14810 | error (_("DW_FORM_addr_index pointing outside of " | |
14811 | ".debug_addr section [in module %s]"), | |
14812 | objfile->name); | |
14813 | info_ptr = (dwarf2_per_objfile->addr.buffer | |
14814 | + addr_base + addr_index * addr_size); | |
14815 | if (addr_size == 4) | |
14816 | return bfd_get_32 (abfd, info_ptr); | |
14817 | else | |
14818 | return bfd_get_64 (abfd, info_ptr); | |
14819 | } | |
14820 | ||
14821 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
14822 | ||
14823 | static CORE_ADDR | |
14824 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
14825 | { | |
14826 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
14827 | } | |
14828 | ||
14829 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
14830 | ||
14831 | static CORE_ADDR | |
d521ce57 | 14832 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
14833 | unsigned int *bytes_read) |
14834 | { | |
14835 | bfd *abfd = cu->objfile->obfd; | |
14836 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
14837 | ||
14838 | return read_addr_index (cu, addr_index); | |
14839 | } | |
14840 | ||
14841 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
14842 | back to dwarf2_read_addr_index. */ | |
14843 | ||
14844 | struct dwarf2_read_addr_index_data | |
14845 | { | |
14846 | ULONGEST addr_base; | |
14847 | int addr_size; | |
14848 | }; | |
14849 | ||
14850 | /* die_reader_func for dwarf2_read_addr_index. */ | |
14851 | ||
14852 | static void | |
14853 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 14854 | const gdb_byte *info_ptr, |
3019eac3 DE |
14855 | struct die_info *comp_unit_die, |
14856 | int has_children, | |
14857 | void *data) | |
14858 | { | |
14859 | struct dwarf2_cu *cu = reader->cu; | |
14860 | struct dwarf2_read_addr_index_data *aidata = | |
14861 | (struct dwarf2_read_addr_index_data *) data; | |
14862 | ||
14863 | aidata->addr_base = cu->addr_base; | |
14864 | aidata->addr_size = cu->header.addr_size; | |
14865 | } | |
14866 | ||
14867 | /* Given an index in .debug_addr, fetch the value. | |
14868 | NOTE: This can be called during dwarf expression evaluation, | |
14869 | long after the debug information has been read, and thus per_cu->cu | |
14870 | may no longer exist. */ | |
14871 | ||
14872 | CORE_ADDR | |
14873 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
14874 | unsigned int addr_index) | |
14875 | { | |
14876 | struct objfile *objfile = per_cu->objfile; | |
14877 | struct dwarf2_cu *cu = per_cu->cu; | |
14878 | ULONGEST addr_base; | |
14879 | int addr_size; | |
14880 | ||
14881 | /* This is intended to be called from outside this file. */ | |
14882 | dw2_setup (objfile); | |
14883 | ||
14884 | /* We need addr_base and addr_size. | |
14885 | If we don't have PER_CU->cu, we have to get it. | |
14886 | Nasty, but the alternative is storing the needed info in PER_CU, | |
14887 | which at this point doesn't seem justified: it's not clear how frequently | |
14888 | it would get used and it would increase the size of every PER_CU. | |
14889 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
14890 | so we're not in uncharted territory here. | |
14891 | Alas we need to be a bit more complicated as addr_base is contained | |
14892 | in the DIE. | |
14893 | ||
14894 | We don't need to read the entire CU(/TU). | |
14895 | We just need the header and top level die. | |
a1b64ce1 | 14896 | |
3019eac3 | 14897 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 14898 | For now we skip this optimization. */ |
3019eac3 DE |
14899 | |
14900 | if (cu != NULL) | |
14901 | { | |
14902 | addr_base = cu->addr_base; | |
14903 | addr_size = cu->header.addr_size; | |
14904 | } | |
14905 | else | |
14906 | { | |
14907 | struct dwarf2_read_addr_index_data aidata; | |
14908 | ||
a1b64ce1 DE |
14909 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
14910 | we need addr_base. */ | |
14911 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
14912 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
14913 | addr_base = aidata.addr_base; |
14914 | addr_size = aidata.addr_size; | |
14915 | } | |
14916 | ||
14917 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
14918 | } | |
14919 | ||
14920 | /* Given a DW_AT_str_index, fetch the string. */ | |
14921 | ||
d521ce57 | 14922 | static const char * |
3019eac3 DE |
14923 | read_str_index (const struct die_reader_specs *reader, |
14924 | struct dwarf2_cu *cu, ULONGEST str_index) | |
14925 | { | |
14926 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14927 | const char *dwo_name = objfile->name; | |
14928 | bfd *abfd = objfile->obfd; | |
14929 | struct dwo_sections *sections = &reader->dwo_file->sections; | |
d521ce57 | 14930 | const gdb_byte *info_ptr; |
3019eac3 DE |
14931 | ULONGEST str_offset; |
14932 | ||
14933 | dwarf2_read_section (objfile, §ions->str); | |
14934 | dwarf2_read_section (objfile, §ions->str_offsets); | |
14935 | if (sections->str.buffer == NULL) | |
14936 | error (_("DW_FORM_str_index used without .debug_str.dwo section" | |
14937 | " in CU at offset 0x%lx [in module %s]"), | |
14938 | (long) cu->header.offset.sect_off, dwo_name); | |
14939 | if (sections->str_offsets.buffer == NULL) | |
14940 | error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section" | |
14941 | " in CU at offset 0x%lx [in module %s]"), | |
14942 | (long) cu->header.offset.sect_off, dwo_name); | |
14943 | if (str_index * cu->header.offset_size >= sections->str_offsets.size) | |
14944 | error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo" | |
14945 | " section in CU at offset 0x%lx [in module %s]"), | |
14946 | (long) cu->header.offset.sect_off, dwo_name); | |
14947 | info_ptr = (sections->str_offsets.buffer | |
14948 | + str_index * cu->header.offset_size); | |
14949 | if (cu->header.offset_size == 4) | |
14950 | str_offset = bfd_get_32 (abfd, info_ptr); | |
14951 | else | |
14952 | str_offset = bfd_get_64 (abfd, info_ptr); | |
14953 | if (str_offset >= sections->str.size) | |
14954 | error (_("Offset from DW_FORM_str_index pointing outside of" | |
14955 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), | |
14956 | (long) cu->header.offset.sect_off, dwo_name); | |
d521ce57 | 14957 | return (const char *) (sections->str.buffer + str_offset); |
3019eac3 DE |
14958 | } |
14959 | ||
3019eac3 DE |
14960 | /* Return the length of an LEB128 number in BUF. */ |
14961 | ||
14962 | static int | |
14963 | leb128_size (const gdb_byte *buf) | |
14964 | { | |
14965 | const gdb_byte *begin = buf; | |
14966 | gdb_byte byte; | |
14967 | ||
14968 | while (1) | |
14969 | { | |
14970 | byte = *buf++; | |
14971 | if ((byte & 128) == 0) | |
14972 | return buf - begin; | |
14973 | } | |
14974 | } | |
14975 | ||
c906108c | 14976 | static void |
e142c38c | 14977 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
14978 | { |
14979 | switch (lang) | |
14980 | { | |
14981 | case DW_LANG_C89: | |
76bee0cc | 14982 | case DW_LANG_C99: |
c906108c | 14983 | case DW_LANG_C: |
e142c38c | 14984 | cu->language = language_c; |
c906108c SS |
14985 | break; |
14986 | case DW_LANG_C_plus_plus: | |
e142c38c | 14987 | cu->language = language_cplus; |
c906108c | 14988 | break; |
6aecb9c2 JB |
14989 | case DW_LANG_D: |
14990 | cu->language = language_d; | |
14991 | break; | |
c906108c SS |
14992 | case DW_LANG_Fortran77: |
14993 | case DW_LANG_Fortran90: | |
b21b22e0 | 14994 | case DW_LANG_Fortran95: |
e142c38c | 14995 | cu->language = language_fortran; |
c906108c | 14996 | break; |
a766d390 DE |
14997 | case DW_LANG_Go: |
14998 | cu->language = language_go; | |
14999 | break; | |
c906108c | 15000 | case DW_LANG_Mips_Assembler: |
e142c38c | 15001 | cu->language = language_asm; |
c906108c | 15002 | break; |
bebd888e | 15003 | case DW_LANG_Java: |
e142c38c | 15004 | cu->language = language_java; |
bebd888e | 15005 | break; |
c906108c | 15006 | case DW_LANG_Ada83: |
8aaf0b47 | 15007 | case DW_LANG_Ada95: |
bc5f45f8 JB |
15008 | cu->language = language_ada; |
15009 | break; | |
72019c9c GM |
15010 | case DW_LANG_Modula2: |
15011 | cu->language = language_m2; | |
15012 | break; | |
fe8e67fd PM |
15013 | case DW_LANG_Pascal83: |
15014 | cu->language = language_pascal; | |
15015 | break; | |
22566fbd DJ |
15016 | case DW_LANG_ObjC: |
15017 | cu->language = language_objc; | |
15018 | break; | |
c906108c SS |
15019 | case DW_LANG_Cobol74: |
15020 | case DW_LANG_Cobol85: | |
c906108c | 15021 | default: |
e142c38c | 15022 | cu->language = language_minimal; |
c906108c SS |
15023 | break; |
15024 | } | |
e142c38c | 15025 | cu->language_defn = language_def (cu->language); |
c906108c SS |
15026 | } |
15027 | ||
15028 | /* Return the named attribute or NULL if not there. */ | |
15029 | ||
15030 | static struct attribute * | |
e142c38c | 15031 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 15032 | { |
a48e046c | 15033 | for (;;) |
c906108c | 15034 | { |
a48e046c TT |
15035 | unsigned int i; |
15036 | struct attribute *spec = NULL; | |
15037 | ||
15038 | for (i = 0; i < die->num_attrs; ++i) | |
15039 | { | |
15040 | if (die->attrs[i].name == name) | |
15041 | return &die->attrs[i]; | |
15042 | if (die->attrs[i].name == DW_AT_specification | |
15043 | || die->attrs[i].name == DW_AT_abstract_origin) | |
15044 | spec = &die->attrs[i]; | |
15045 | } | |
15046 | ||
15047 | if (!spec) | |
15048 | break; | |
c906108c | 15049 | |
f2f0e013 | 15050 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 15051 | } |
c5aa993b | 15052 | |
c906108c SS |
15053 | return NULL; |
15054 | } | |
15055 | ||
348e048f DE |
15056 | /* Return the named attribute or NULL if not there, |
15057 | but do not follow DW_AT_specification, etc. | |
15058 | This is for use in contexts where we're reading .debug_types dies. | |
15059 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
15060 | back up the chain, and we want to go down. */ | |
15061 | ||
15062 | static struct attribute * | |
45e58e77 | 15063 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
15064 | { |
15065 | unsigned int i; | |
15066 | ||
15067 | for (i = 0; i < die->num_attrs; ++i) | |
15068 | if (die->attrs[i].name == name) | |
15069 | return &die->attrs[i]; | |
15070 | ||
15071 | return NULL; | |
15072 | } | |
15073 | ||
05cf31d1 JB |
15074 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
15075 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 15076 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
15077 | |
15078 | static int | |
15079 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
15080 | { | |
15081 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
15082 | ||
15083 | return (attr && DW_UNSND (attr)); | |
15084 | } | |
15085 | ||
3ca72b44 | 15086 | static int |
e142c38c | 15087 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 15088 | { |
05cf31d1 JB |
15089 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
15090 | which value is non-zero. However, we have to be careful with | |
15091 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
15092 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
15093 | end up accidently finding a declaration attribute that belongs | |
15094 | to a different DIE referenced by the specification attribute, | |
15095 | even though the given DIE does not have a declaration attribute. */ | |
15096 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
15097 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
15098 | } |
15099 | ||
63d06c5c | 15100 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 15101 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
15102 | containing the return value on output. If there is no |
15103 | specification, but there is an abstract origin, that is | |
15104 | returned. */ | |
63d06c5c DC |
15105 | |
15106 | static struct die_info * | |
f2f0e013 | 15107 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 15108 | { |
f2f0e013 DJ |
15109 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
15110 | *spec_cu); | |
63d06c5c | 15111 | |
edb3359d DJ |
15112 | if (spec_attr == NULL) |
15113 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
15114 | ||
63d06c5c DC |
15115 | if (spec_attr == NULL) |
15116 | return NULL; | |
15117 | else | |
f2f0e013 | 15118 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 15119 | } |
c906108c | 15120 | |
debd256d | 15121 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
15122 | refers to. |
15123 | NOTE: This is also used as a "cleanup" function. */ | |
15124 | ||
debd256d JB |
15125 | static void |
15126 | free_line_header (struct line_header *lh) | |
15127 | { | |
15128 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 15129 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
15130 | |
15131 | /* Remember that all the lh->file_names[i].name pointers are | |
15132 | pointers into debug_line_buffer, and don't need to be freed. */ | |
15133 | if (lh->file_names) | |
a8bc7b56 | 15134 | xfree (lh->file_names); |
debd256d JB |
15135 | |
15136 | /* Similarly for the include directory names. */ | |
15137 | if (lh->include_dirs) | |
a8bc7b56 | 15138 | xfree (lh->include_dirs); |
debd256d | 15139 | |
a8bc7b56 | 15140 | xfree (lh); |
debd256d JB |
15141 | } |
15142 | ||
debd256d | 15143 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 15144 | |
debd256d | 15145 | static void |
d521ce57 | 15146 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 15147 | { |
debd256d JB |
15148 | /* Grow the array if necessary. */ |
15149 | if (lh->include_dirs_size == 0) | |
c5aa993b | 15150 | { |
debd256d JB |
15151 | lh->include_dirs_size = 1; /* for testing */ |
15152 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
15153 | * sizeof (*lh->include_dirs)); | |
15154 | } | |
15155 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
15156 | { | |
15157 | lh->include_dirs_size *= 2; | |
15158 | lh->include_dirs = xrealloc (lh->include_dirs, | |
15159 | (lh->include_dirs_size | |
15160 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 15161 | } |
c906108c | 15162 | |
debd256d JB |
15163 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
15164 | } | |
6e70227d | 15165 | |
debd256d | 15166 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 15167 | |
debd256d JB |
15168 | static void |
15169 | add_file_name (struct line_header *lh, | |
d521ce57 | 15170 | const char *name, |
debd256d JB |
15171 | unsigned int dir_index, |
15172 | unsigned int mod_time, | |
15173 | unsigned int length) | |
15174 | { | |
15175 | struct file_entry *fe; | |
15176 | ||
15177 | /* Grow the array if necessary. */ | |
15178 | if (lh->file_names_size == 0) | |
15179 | { | |
15180 | lh->file_names_size = 1; /* for testing */ | |
15181 | lh->file_names = xmalloc (lh->file_names_size | |
15182 | * sizeof (*lh->file_names)); | |
15183 | } | |
15184 | else if (lh->num_file_names >= lh->file_names_size) | |
15185 | { | |
15186 | lh->file_names_size *= 2; | |
15187 | lh->file_names = xrealloc (lh->file_names, | |
15188 | (lh->file_names_size | |
15189 | * sizeof (*lh->file_names))); | |
15190 | } | |
15191 | ||
15192 | fe = &lh->file_names[lh->num_file_names++]; | |
15193 | fe->name = name; | |
15194 | fe->dir_index = dir_index; | |
15195 | fe->mod_time = mod_time; | |
15196 | fe->length = length; | |
aaa75496 | 15197 | fe->included_p = 0; |
cb1df416 | 15198 | fe->symtab = NULL; |
debd256d | 15199 | } |
6e70227d | 15200 | |
36586728 TT |
15201 | /* A convenience function to find the proper .debug_line section for a |
15202 | CU. */ | |
15203 | ||
15204 | static struct dwarf2_section_info * | |
15205 | get_debug_line_section (struct dwarf2_cu *cu) | |
15206 | { | |
15207 | struct dwarf2_section_info *section; | |
15208 | ||
15209 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
15210 | DWO file. */ | |
15211 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
15212 | section = &cu->dwo_unit->dwo_file->sections.line; | |
15213 | else if (cu->per_cu->is_dwz) | |
15214 | { | |
15215 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
15216 | ||
15217 | section = &dwz->line; | |
15218 | } | |
15219 | else | |
15220 | section = &dwarf2_per_objfile->line; | |
15221 | ||
15222 | return section; | |
15223 | } | |
15224 | ||
debd256d | 15225 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 15226 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 15227 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
15228 | |
15229 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
15230 | the returned object point into the dwarf line section buffer, |
15231 | and must not be freed. */ | |
ae2de4f8 | 15232 | |
debd256d | 15233 | static struct line_header * |
3019eac3 | 15234 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
15235 | { |
15236 | struct cleanup *back_to; | |
15237 | struct line_header *lh; | |
d521ce57 | 15238 | const gdb_byte *line_ptr; |
c764a876 | 15239 | unsigned int bytes_read, offset_size; |
debd256d | 15240 | int i; |
d521ce57 | 15241 | const char *cur_dir, *cur_file; |
3019eac3 DE |
15242 | struct dwarf2_section_info *section; |
15243 | bfd *abfd; | |
15244 | ||
36586728 | 15245 | section = get_debug_line_section (cu); |
3019eac3 DE |
15246 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
15247 | if (section->buffer == NULL) | |
debd256d | 15248 | { |
3019eac3 DE |
15249 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
15250 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
15251 | else | |
15252 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
15253 | return 0; |
15254 | } | |
15255 | ||
fceca515 DE |
15256 | /* We can't do this until we know the section is non-empty. |
15257 | Only then do we know we have such a section. */ | |
15258 | abfd = section->asection->owner; | |
15259 | ||
a738430d MK |
15260 | /* Make sure that at least there's room for the total_length field. |
15261 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 15262 | if (offset + 4 >= section->size) |
debd256d | 15263 | { |
4d3c2250 | 15264 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
15265 | return 0; |
15266 | } | |
15267 | ||
15268 | lh = xmalloc (sizeof (*lh)); | |
15269 | memset (lh, 0, sizeof (*lh)); | |
15270 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
15271 | (void *) lh); | |
15272 | ||
3019eac3 | 15273 | line_ptr = section->buffer + offset; |
debd256d | 15274 | |
a738430d | 15275 | /* Read in the header. */ |
6e70227d | 15276 | lh->total_length = |
c764a876 DE |
15277 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
15278 | &bytes_read, &offset_size); | |
debd256d | 15279 | line_ptr += bytes_read; |
3019eac3 | 15280 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 15281 | { |
4d3c2250 | 15282 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
15283 | return 0; |
15284 | } | |
15285 | lh->statement_program_end = line_ptr + lh->total_length; | |
15286 | lh->version = read_2_bytes (abfd, line_ptr); | |
15287 | line_ptr += 2; | |
c764a876 DE |
15288 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
15289 | line_ptr += offset_size; | |
debd256d JB |
15290 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
15291 | line_ptr += 1; | |
2dc7f7b3 TT |
15292 | if (lh->version >= 4) |
15293 | { | |
15294 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
15295 | line_ptr += 1; | |
15296 | } | |
15297 | else | |
15298 | lh->maximum_ops_per_instruction = 1; | |
15299 | ||
15300 | if (lh->maximum_ops_per_instruction == 0) | |
15301 | { | |
15302 | lh->maximum_ops_per_instruction = 1; | |
15303 | complaint (&symfile_complaints, | |
3e43a32a MS |
15304 | _("invalid maximum_ops_per_instruction " |
15305 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
15306 | } |
15307 | ||
debd256d JB |
15308 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
15309 | line_ptr += 1; | |
15310 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
15311 | line_ptr += 1; | |
15312 | lh->line_range = read_1_byte (abfd, line_ptr); | |
15313 | line_ptr += 1; | |
15314 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
15315 | line_ptr += 1; | |
15316 | lh->standard_opcode_lengths | |
fe1b8b76 | 15317 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
15318 | |
15319 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
15320 | for (i = 1; i < lh->opcode_base; ++i) | |
15321 | { | |
15322 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
15323 | line_ptr += 1; | |
15324 | } | |
15325 | ||
a738430d | 15326 | /* Read directory table. */ |
9b1c24c8 | 15327 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15328 | { |
15329 | line_ptr += bytes_read; | |
15330 | add_include_dir (lh, cur_dir); | |
15331 | } | |
15332 | line_ptr += bytes_read; | |
15333 | ||
a738430d | 15334 | /* Read file name table. */ |
9b1c24c8 | 15335 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15336 | { |
15337 | unsigned int dir_index, mod_time, length; | |
15338 | ||
15339 | line_ptr += bytes_read; | |
15340 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15341 | line_ptr += bytes_read; | |
15342 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15343 | line_ptr += bytes_read; | |
15344 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15345 | line_ptr += bytes_read; | |
15346 | ||
15347 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15348 | } | |
15349 | line_ptr += bytes_read; | |
6e70227d | 15350 | lh->statement_program_start = line_ptr; |
debd256d | 15351 | |
3019eac3 | 15352 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 15353 | complaint (&symfile_complaints, |
3e43a32a MS |
15354 | _("line number info header doesn't " |
15355 | "fit in `.debug_line' section")); | |
debd256d JB |
15356 | |
15357 | discard_cleanups (back_to); | |
15358 | return lh; | |
15359 | } | |
c906108c | 15360 | |
c6da4cef DE |
15361 | /* Subroutine of dwarf_decode_lines to simplify it. |
15362 | Return the file name of the psymtab for included file FILE_INDEX | |
15363 | in line header LH of PST. | |
15364 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15365 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
15366 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
15367 | ||
15368 | The function creates dangling cleanup registration. */ | |
c6da4cef | 15369 | |
d521ce57 | 15370 | static const char * |
c6da4cef DE |
15371 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
15372 | const struct partial_symtab *pst, | |
15373 | const char *comp_dir) | |
15374 | { | |
15375 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
15376 | const char *include_name = fe.name; |
15377 | const char *include_name_to_compare = include_name; | |
15378 | const char *dir_name = NULL; | |
72b9f47f TT |
15379 | const char *pst_filename; |
15380 | char *copied_name = NULL; | |
c6da4cef DE |
15381 | int file_is_pst; |
15382 | ||
15383 | if (fe.dir_index) | |
15384 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
15385 | ||
15386 | if (!IS_ABSOLUTE_PATH (include_name) | |
15387 | && (dir_name != NULL || comp_dir != NULL)) | |
15388 | { | |
15389 | /* Avoid creating a duplicate psymtab for PST. | |
15390 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
15391 | Before we do the comparison, however, we need to account | |
15392 | for DIR_NAME and COMP_DIR. | |
15393 | First prepend dir_name (if non-NULL). If we still don't | |
15394 | have an absolute path prepend comp_dir (if non-NULL). | |
15395 | However, the directory we record in the include-file's | |
15396 | psymtab does not contain COMP_DIR (to match the | |
15397 | corresponding symtab(s)). | |
15398 | ||
15399 | Example: | |
15400 | ||
15401 | bash$ cd /tmp | |
15402 | bash$ gcc -g ./hello.c | |
15403 | include_name = "hello.c" | |
15404 | dir_name = "." | |
15405 | DW_AT_comp_dir = comp_dir = "/tmp" | |
15406 | DW_AT_name = "./hello.c" */ | |
15407 | ||
15408 | if (dir_name != NULL) | |
15409 | { | |
d521ce57 TT |
15410 | char *tem = concat (dir_name, SLASH_STRING, |
15411 | include_name, (char *)NULL); | |
15412 | ||
15413 | make_cleanup (xfree, tem); | |
15414 | include_name = tem; | |
c6da4cef | 15415 | include_name_to_compare = include_name; |
c6da4cef DE |
15416 | } |
15417 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
15418 | { | |
d521ce57 TT |
15419 | char *tem = concat (comp_dir, SLASH_STRING, |
15420 | include_name, (char *)NULL); | |
15421 | ||
15422 | make_cleanup (xfree, tem); | |
15423 | include_name_to_compare = tem; | |
c6da4cef DE |
15424 | } |
15425 | } | |
15426 | ||
15427 | pst_filename = pst->filename; | |
15428 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
15429 | { | |
72b9f47f TT |
15430 | copied_name = concat (pst->dirname, SLASH_STRING, |
15431 | pst_filename, (char *)NULL); | |
15432 | pst_filename = copied_name; | |
c6da4cef DE |
15433 | } |
15434 | ||
1e3fad37 | 15435 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 15436 | |
72b9f47f TT |
15437 | if (copied_name != NULL) |
15438 | xfree (copied_name); | |
c6da4cef DE |
15439 | |
15440 | if (file_is_pst) | |
15441 | return NULL; | |
15442 | return include_name; | |
15443 | } | |
15444 | ||
c91513d8 PP |
15445 | /* Ignore this record_line request. */ |
15446 | ||
15447 | static void | |
15448 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
15449 | { | |
15450 | return; | |
15451 | } | |
15452 | ||
f3f5162e DE |
15453 | /* Subroutine of dwarf_decode_lines to simplify it. |
15454 | Process the line number information in LH. */ | |
debd256d | 15455 | |
c906108c | 15456 | static void |
f3f5162e DE |
15457 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
15458 | struct dwarf2_cu *cu, struct partial_symtab *pst) | |
c906108c | 15459 | { |
d521ce57 TT |
15460 | const gdb_byte *line_ptr, *extended_end; |
15461 | const gdb_byte *line_end; | |
a8c50c1f | 15462 | unsigned int bytes_read, extended_len; |
c906108c | 15463 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
15464 | CORE_ADDR baseaddr; |
15465 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 15466 | bfd *abfd = objfile->obfd; |
fbf65064 | 15467 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 15468 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 15469 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
15470 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
15471 | = record_line; | |
e142c38c DJ |
15472 | |
15473 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15474 | |
debd256d JB |
15475 | line_ptr = lh->statement_program_start; |
15476 | line_end = lh->statement_program_end; | |
c906108c SS |
15477 | |
15478 | /* Read the statement sequences until there's nothing left. */ | |
15479 | while (line_ptr < line_end) | |
15480 | { | |
15481 | /* state machine registers */ | |
15482 | CORE_ADDR address = 0; | |
15483 | unsigned int file = 1; | |
15484 | unsigned int line = 1; | |
15485 | unsigned int column = 0; | |
debd256d | 15486 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
15487 | int basic_block = 0; |
15488 | int end_sequence = 0; | |
fbf65064 | 15489 | CORE_ADDR addr; |
2dc7f7b3 | 15490 | unsigned char op_index = 0; |
c906108c | 15491 | |
aaa75496 | 15492 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 15493 | { |
aaa75496 | 15494 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
15495 | /* lh->include_dirs and lh->file_names are 0-based, but the |
15496 | directory and file name numbers in the statement program | |
15497 | are 1-based. */ | |
15498 | struct file_entry *fe = &lh->file_names[file - 1]; | |
d521ce57 | 15499 | const char *dir = NULL; |
a738430d | 15500 | |
debd256d JB |
15501 | if (fe->dir_index) |
15502 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
15503 | |
15504 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
15505 | } |
15506 | ||
a738430d | 15507 | /* Decode the table. */ |
c5aa993b | 15508 | while (!end_sequence) |
c906108c SS |
15509 | { |
15510 | op_code = read_1_byte (abfd, line_ptr); | |
15511 | line_ptr += 1; | |
59205f5a JB |
15512 | if (line_ptr > line_end) |
15513 | { | |
15514 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
15515 | break; | |
15516 | } | |
9aa1fe7e | 15517 | |
debd256d | 15518 | if (op_code >= lh->opcode_base) |
6e70227d | 15519 | { |
a738430d | 15520 | /* Special operand. */ |
debd256d | 15521 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
15522 | address += (((op_index + (adj_opcode / lh->line_range)) |
15523 | / lh->maximum_ops_per_instruction) | |
15524 | * lh->minimum_instruction_length); | |
15525 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
15526 | % lh->maximum_ops_per_instruction); | |
debd256d | 15527 | line += lh->line_base + (adj_opcode % lh->line_range); |
59205f5a | 15528 | if (lh->num_file_names < file || file == 0) |
25e43795 | 15529 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
15530 | /* For now we ignore lines not starting on an |
15531 | instruction boundary. */ | |
15532 | else if (op_index == 0) | |
25e43795 DJ |
15533 | { |
15534 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 15535 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15536 | { |
15537 | if (last_subfile != current_subfile) | |
15538 | { | |
15539 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15540 | if (last_subfile) | |
c91513d8 | 15541 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15542 | last_subfile = current_subfile; |
15543 | } | |
25e43795 | 15544 | /* Append row to matrix using current values. */ |
7019d805 | 15545 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15546 | (*p_record_line) (current_subfile, line, addr); |
366da635 | 15547 | } |
25e43795 | 15548 | } |
ca5f395d | 15549 | basic_block = 0; |
9aa1fe7e GK |
15550 | } |
15551 | else switch (op_code) | |
c906108c SS |
15552 | { |
15553 | case DW_LNS_extended_op: | |
3e43a32a MS |
15554 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
15555 | &bytes_read); | |
473b7be6 | 15556 | line_ptr += bytes_read; |
a8c50c1f | 15557 | extended_end = line_ptr + extended_len; |
c906108c SS |
15558 | extended_op = read_1_byte (abfd, line_ptr); |
15559 | line_ptr += 1; | |
15560 | switch (extended_op) | |
15561 | { | |
15562 | case DW_LNE_end_sequence: | |
c91513d8 | 15563 | p_record_line = record_line; |
c906108c | 15564 | end_sequence = 1; |
c906108c SS |
15565 | break; |
15566 | case DW_LNE_set_address: | |
e7c27a73 | 15567 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 PP |
15568 | |
15569 | if (address == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15570 | { | |
15571 | /* This line table is for a function which has been | |
15572 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
15573 | ||
15574 | long line_offset | |
36586728 | 15575 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
15576 | |
15577 | complaint (&symfile_complaints, | |
15578 | _(".debug_line address at offset 0x%lx is 0 " | |
15579 | "[in module %s]"), | |
bb5ed363 | 15580 | line_offset, objfile->name); |
c91513d8 PP |
15581 | p_record_line = noop_record_line; |
15582 | } | |
15583 | ||
2dc7f7b3 | 15584 | op_index = 0; |
107d2387 AC |
15585 | line_ptr += bytes_read; |
15586 | address += baseaddr; | |
c906108c SS |
15587 | break; |
15588 | case DW_LNE_define_file: | |
debd256d | 15589 | { |
d521ce57 | 15590 | const char *cur_file; |
debd256d | 15591 | unsigned int dir_index, mod_time, length; |
6e70227d | 15592 | |
3e43a32a MS |
15593 | cur_file = read_direct_string (abfd, line_ptr, |
15594 | &bytes_read); | |
debd256d JB |
15595 | line_ptr += bytes_read; |
15596 | dir_index = | |
15597 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15598 | line_ptr += bytes_read; | |
15599 | mod_time = | |
15600 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15601 | line_ptr += bytes_read; | |
15602 | length = | |
15603 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15604 | line_ptr += bytes_read; | |
15605 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15606 | } | |
c906108c | 15607 | break; |
d0c6ba3d CC |
15608 | case DW_LNE_set_discriminator: |
15609 | /* The discriminator is not interesting to the debugger; | |
15610 | just ignore it. */ | |
15611 | line_ptr = extended_end; | |
15612 | break; | |
c906108c | 15613 | default: |
4d3c2250 | 15614 | complaint (&symfile_complaints, |
e2e0b3e5 | 15615 | _("mangled .debug_line section")); |
debd256d | 15616 | return; |
c906108c | 15617 | } |
a8c50c1f DJ |
15618 | /* Make sure that we parsed the extended op correctly. If e.g. |
15619 | we expected a different address size than the producer used, | |
15620 | we may have read the wrong number of bytes. */ | |
15621 | if (line_ptr != extended_end) | |
15622 | { | |
15623 | complaint (&symfile_complaints, | |
15624 | _("mangled .debug_line section")); | |
15625 | return; | |
15626 | } | |
c906108c SS |
15627 | break; |
15628 | case DW_LNS_copy: | |
59205f5a | 15629 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15630 | dwarf2_debug_line_missing_file_complaint (); |
15631 | else | |
366da635 | 15632 | { |
25e43795 | 15633 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 15634 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15635 | { |
15636 | if (last_subfile != current_subfile) | |
15637 | { | |
15638 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15639 | if (last_subfile) | |
c91513d8 | 15640 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15641 | last_subfile = current_subfile; |
15642 | } | |
7019d805 | 15643 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15644 | (*p_record_line) (current_subfile, line, addr); |
fbf65064 | 15645 | } |
366da635 | 15646 | } |
c906108c SS |
15647 | basic_block = 0; |
15648 | break; | |
15649 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
15650 | { |
15651 | CORE_ADDR adjust | |
15652 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15653 | ||
15654 | address += (((op_index + adjust) | |
15655 | / lh->maximum_ops_per_instruction) | |
15656 | * lh->minimum_instruction_length); | |
15657 | op_index = ((op_index + adjust) | |
15658 | % lh->maximum_ops_per_instruction); | |
15659 | line_ptr += bytes_read; | |
15660 | } | |
c906108c SS |
15661 | break; |
15662 | case DW_LNS_advance_line: | |
15663 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
15664 | line_ptr += bytes_read; | |
15665 | break; | |
15666 | case DW_LNS_set_file: | |
debd256d | 15667 | { |
a738430d MK |
15668 | /* The arrays lh->include_dirs and lh->file_names are |
15669 | 0-based, but the directory and file name numbers in | |
15670 | the statement program are 1-based. */ | |
debd256d | 15671 | struct file_entry *fe; |
d521ce57 | 15672 | const char *dir = NULL; |
a738430d | 15673 | |
debd256d JB |
15674 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
15675 | line_ptr += bytes_read; | |
59205f5a | 15676 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15677 | dwarf2_debug_line_missing_file_complaint (); |
15678 | else | |
15679 | { | |
15680 | fe = &lh->file_names[file - 1]; | |
15681 | if (fe->dir_index) | |
15682 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15683 | if (!decode_for_pst_p) | |
15684 | { | |
15685 | last_subfile = current_subfile; | |
15686 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15687 | } | |
15688 | } | |
debd256d | 15689 | } |
c906108c SS |
15690 | break; |
15691 | case DW_LNS_set_column: | |
15692 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15693 | line_ptr += bytes_read; | |
15694 | break; | |
15695 | case DW_LNS_negate_stmt: | |
15696 | is_stmt = (!is_stmt); | |
15697 | break; | |
15698 | case DW_LNS_set_basic_block: | |
15699 | basic_block = 1; | |
15700 | break; | |
c2c6d25f JM |
15701 | /* Add to the address register of the state machine the |
15702 | address increment value corresponding to special opcode | |
a738430d MK |
15703 | 255. I.e., this value is scaled by the minimum |
15704 | instruction length since special opcode 255 would have | |
b021a221 | 15705 | scaled the increment. */ |
c906108c | 15706 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
15707 | { |
15708 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
15709 | ||
15710 | address += (((op_index + adjust) | |
15711 | / lh->maximum_ops_per_instruction) | |
15712 | * lh->minimum_instruction_length); | |
15713 | op_index = ((op_index + adjust) | |
15714 | % lh->maximum_ops_per_instruction); | |
15715 | } | |
c906108c SS |
15716 | break; |
15717 | case DW_LNS_fixed_advance_pc: | |
15718 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 15719 | op_index = 0; |
c906108c SS |
15720 | line_ptr += 2; |
15721 | break; | |
9aa1fe7e | 15722 | default: |
a738430d MK |
15723 | { |
15724 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 15725 | int i; |
a738430d | 15726 | |
debd256d | 15727 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
15728 | { |
15729 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15730 | line_ptr += bytes_read; | |
15731 | } | |
15732 | } | |
c906108c SS |
15733 | } |
15734 | } | |
59205f5a JB |
15735 | if (lh->num_file_names < file || file == 0) |
15736 | dwarf2_debug_line_missing_file_complaint (); | |
15737 | else | |
15738 | { | |
15739 | lh->file_names[file - 1].included_p = 1; | |
15740 | if (!decode_for_pst_p) | |
fbf65064 UW |
15741 | { |
15742 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
c91513d8 | 15743 | (*p_record_line) (current_subfile, 0, addr); |
fbf65064 | 15744 | } |
59205f5a | 15745 | } |
c906108c | 15746 | } |
f3f5162e DE |
15747 | } |
15748 | ||
15749 | /* Decode the Line Number Program (LNP) for the given line_header | |
15750 | structure and CU. The actual information extracted and the type | |
15751 | of structures created from the LNP depends on the value of PST. | |
15752 | ||
15753 | 1. If PST is NULL, then this procedure uses the data from the program | |
15754 | to create all necessary symbol tables, and their linetables. | |
15755 | ||
15756 | 2. If PST is not NULL, this procedure reads the program to determine | |
15757 | the list of files included by the unit represented by PST, and | |
15758 | builds all the associated partial symbol tables. | |
15759 | ||
15760 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15761 | It is used for relative paths in the line table. | |
15762 | NOTE: When processing partial symtabs (pst != NULL), | |
15763 | comp_dir == pst->dirname. | |
15764 | ||
15765 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
15766 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
15767 | symtab we don't use it in the name of the psymtabs we create. | |
15768 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
15769 | A good testcase for this is mb-inline.exp. */ | |
15770 | ||
15771 | static void | |
15772 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
15773 | struct dwarf2_cu *cu, struct partial_symtab *pst, | |
15774 | int want_line_info) | |
15775 | { | |
15776 | struct objfile *objfile = cu->objfile; | |
15777 | const int decode_for_pst_p = (pst != NULL); | |
15778 | struct subfile *first_subfile = current_subfile; | |
15779 | ||
15780 | if (want_line_info) | |
15781 | dwarf_decode_lines_1 (lh, comp_dir, cu, pst); | |
aaa75496 JB |
15782 | |
15783 | if (decode_for_pst_p) | |
15784 | { | |
15785 | int file_index; | |
15786 | ||
15787 | /* Now that we're done scanning the Line Header Program, we can | |
15788 | create the psymtab of each included file. */ | |
15789 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
15790 | if (lh->file_names[file_index].included_p == 1) | |
15791 | { | |
d521ce57 | 15792 | const char *include_name = |
c6da4cef DE |
15793 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
15794 | if (include_name != NULL) | |
aaa75496 JB |
15795 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
15796 | } | |
15797 | } | |
cb1df416 DJ |
15798 | else |
15799 | { | |
15800 | /* Make sure a symtab is created for every file, even files | |
15801 | which contain only variables (i.e. no code with associated | |
15802 | line numbers). */ | |
cb1df416 | 15803 | int i; |
cb1df416 DJ |
15804 | |
15805 | for (i = 0; i < lh->num_file_names; i++) | |
15806 | { | |
d521ce57 | 15807 | const char *dir = NULL; |
f3f5162e | 15808 | struct file_entry *fe; |
9a619af0 | 15809 | |
cb1df416 DJ |
15810 | fe = &lh->file_names[i]; |
15811 | if (fe->dir_index) | |
15812 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15813 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15814 | ||
15815 | /* Skip the main file; we don't need it, and it must be | |
15816 | allocated last, so that it will show up before the | |
15817 | non-primary symtabs in the objfile's symtab list. */ | |
15818 | if (current_subfile == first_subfile) | |
15819 | continue; | |
15820 | ||
15821 | if (current_subfile->symtab == NULL) | |
15822 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 15823 | objfile); |
cb1df416 DJ |
15824 | fe->symtab = current_subfile->symtab; |
15825 | } | |
15826 | } | |
c906108c SS |
15827 | } |
15828 | ||
15829 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
15830 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
15831 | or NULL if not known. COMP_DIR is the compilation directory for the |
15832 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
15833 | This routine tries to keep line numbers from identical absolute and |
15834 | relative file names in a common subfile. | |
15835 | ||
15836 | Using the `list' example from the GDB testsuite, which resides in | |
15837 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
15838 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
15839 | ||
c5aa993b JM |
15840 | DW_AT_name: /srcdir/list0.c |
15841 | DW_AT_comp_dir: /compdir | |
357e46e7 | 15842 | files.files[0].name: list0.h |
c5aa993b | 15843 | files.files[0].dir: /srcdir |
357e46e7 | 15844 | files.files[1].name: list0.c |
c5aa993b | 15845 | files.files[1].dir: /srcdir |
c906108c SS |
15846 | |
15847 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
15848 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
15849 | start_subfile will ensure that this happens provided that we pass the | |
15850 | concatenation of files.files[1].dir and files.files[1].name as the | |
15851 | subfile's name. */ | |
c906108c SS |
15852 | |
15853 | static void | |
d521ce57 | 15854 | dwarf2_start_subfile (const char *filename, const char *dirname, |
3e43a32a | 15855 | const char *comp_dir) |
c906108c | 15856 | { |
d521ce57 | 15857 | char *copy = NULL; |
4f1520fb FR |
15858 | |
15859 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
15860 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
15861 | second argument to start_subfile. To be consistent, we do the | |
15862 | same here. In order not to lose the line information directory, | |
15863 | we concatenate it to the filename when it makes sense. | |
15864 | Note that the Dwarf3 standard says (speaking of filenames in line | |
15865 | information): ``The directory index is ignored for file names | |
15866 | that represent full path names''. Thus ignoring dirname in the | |
15867 | `else' branch below isn't an issue. */ | |
c906108c | 15868 | |
d5166ae1 | 15869 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
15870 | { |
15871 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
15872 | filename = copy; | |
15873 | } | |
c906108c | 15874 | |
d521ce57 | 15875 | start_subfile (filename, comp_dir); |
4f1520fb | 15876 | |
d521ce57 TT |
15877 | if (copy != NULL) |
15878 | xfree (copy); | |
c906108c SS |
15879 | } |
15880 | ||
f4dc4d17 DE |
15881 | /* Start a symtab for DWARF. |
15882 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
15883 | ||
15884 | static void | |
15885 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15d034d0 | 15886 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 DE |
15887 | { |
15888 | start_symtab (name, comp_dir, low_pc); | |
15889 | record_debugformat ("DWARF 2"); | |
15890 | record_producer (cu->producer); | |
15891 | ||
15892 | /* We assume that we're processing GCC output. */ | |
15893 | processing_gcc_compilation = 2; | |
15894 | ||
4d4ec4e5 | 15895 | cu->processing_has_namespace_info = 0; |
f4dc4d17 DE |
15896 | } |
15897 | ||
4c2df51b DJ |
15898 | static void |
15899 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 15900 | struct dwarf2_cu *cu) |
4c2df51b | 15901 | { |
e7c27a73 DJ |
15902 | struct objfile *objfile = cu->objfile; |
15903 | struct comp_unit_head *cu_header = &cu->header; | |
15904 | ||
4c2df51b DJ |
15905 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
15906 | code here to turn a symbol with DW_AT_external and a | |
15907 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
15908 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
15909 | with some versions of binutils) where shared libraries could have | |
15910 | relocations against symbols in their debug information - the | |
15911 | minimal symbol would have the right address, but the debug info | |
15912 | would not. It's no longer necessary, because we will explicitly | |
15913 | apply relocations when we read in the debug information now. */ | |
15914 | ||
15915 | /* A DW_AT_location attribute with no contents indicates that a | |
15916 | variable has been optimized away. */ | |
15917 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
15918 | { | |
f1e6e072 | 15919 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
15920 | return; |
15921 | } | |
15922 | ||
15923 | /* Handle one degenerate form of location expression specially, to | |
15924 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
15925 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
15926 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
15927 | |
15928 | if (attr_form_is_block (attr) | |
3019eac3 DE |
15929 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
15930 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
15931 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
15932 | && (DW_BLOCK (attr)->size | |
15933 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 15934 | { |
891d2f0b | 15935 | unsigned int dummy; |
4c2df51b | 15936 | |
3019eac3 DE |
15937 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
15938 | SYMBOL_VALUE_ADDRESS (sym) = | |
15939 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
15940 | else | |
15941 | SYMBOL_VALUE_ADDRESS (sym) = | |
15942 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 15943 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
15944 | fixup_symbol_section (sym, objfile); |
15945 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
15946 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
15947 | return; |
15948 | } | |
15949 | ||
15950 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
15951 | expression evaluator, and use LOC_COMPUTED only when necessary | |
15952 | (i.e. when the value of a register or memory location is | |
15953 | referenced, or a thread-local block, etc.). Then again, it might | |
15954 | not be worthwhile. I'm assuming that it isn't unless performance | |
15955 | or memory numbers show me otherwise. */ | |
15956 | ||
f1e6e072 | 15957 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 15958 | |
f1e6e072 | 15959 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 15960 | cu->has_loclist = 1; |
4c2df51b DJ |
15961 | } |
15962 | ||
c906108c SS |
15963 | /* Given a pointer to a DWARF information entry, figure out if we need |
15964 | to make a symbol table entry for it, and if so, create a new entry | |
15965 | and return a pointer to it. | |
15966 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
15967 | used the passed type. |
15968 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
15969 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
15970 | |
15971 | static struct symbol * | |
34eaf542 TT |
15972 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
15973 | struct symbol *space) | |
c906108c | 15974 | { |
e7c27a73 | 15975 | struct objfile *objfile = cu->objfile; |
c906108c | 15976 | struct symbol *sym = NULL; |
15d034d0 | 15977 | const char *name; |
c906108c SS |
15978 | struct attribute *attr = NULL; |
15979 | struct attribute *attr2 = NULL; | |
e142c38c | 15980 | CORE_ADDR baseaddr; |
e37fd15a SW |
15981 | struct pending **list_to_add = NULL; |
15982 | ||
edb3359d | 15983 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
15984 | |
15985 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15986 | |
94af9270 | 15987 | name = dwarf2_name (die, cu); |
c906108c SS |
15988 | if (name) |
15989 | { | |
94af9270 | 15990 | const char *linkagename; |
34eaf542 | 15991 | int suppress_add = 0; |
94af9270 | 15992 | |
34eaf542 TT |
15993 | if (space) |
15994 | sym = space; | |
15995 | else | |
e623cf5d | 15996 | sym = allocate_symbol (objfile); |
c906108c | 15997 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
15998 | |
15999 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 16000 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
16001 | linkagename = dwarf2_physname (name, die, cu); |
16002 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 16003 | |
f55ee35c JK |
16004 | /* Fortran does not have mangling standard and the mangling does differ |
16005 | between gfortran, iFort etc. */ | |
16006 | if (cu->language == language_fortran | |
b250c185 | 16007 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 16008 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 16009 | dwarf2_full_name (name, die, cu), |
29df156d | 16010 | NULL); |
f55ee35c | 16011 | |
c906108c | 16012 | /* Default assumptions. |
c5aa993b | 16013 | Use the passed type or decode it from the die. */ |
176620f1 | 16014 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 16015 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
16016 | if (type != NULL) |
16017 | SYMBOL_TYPE (sym) = type; | |
16018 | else | |
e7c27a73 | 16019 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
16020 | attr = dwarf2_attr (die, |
16021 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
16022 | cu); | |
c906108c SS |
16023 | if (attr) |
16024 | { | |
16025 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
16026 | } | |
cb1df416 | 16027 | |
edb3359d DJ |
16028 | attr = dwarf2_attr (die, |
16029 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
16030 | cu); | |
cb1df416 DJ |
16031 | if (attr) |
16032 | { | |
16033 | int file_index = DW_UNSND (attr); | |
9a619af0 | 16034 | |
cb1df416 DJ |
16035 | if (cu->line_header == NULL |
16036 | || file_index > cu->line_header->num_file_names) | |
16037 | complaint (&symfile_complaints, | |
16038 | _("file index out of range")); | |
1c3d648d | 16039 | else if (file_index > 0) |
cb1df416 DJ |
16040 | { |
16041 | struct file_entry *fe; | |
9a619af0 | 16042 | |
cb1df416 DJ |
16043 | fe = &cu->line_header->file_names[file_index - 1]; |
16044 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
16045 | } | |
16046 | } | |
16047 | ||
c906108c SS |
16048 | switch (die->tag) |
16049 | { | |
16050 | case DW_TAG_label: | |
e142c38c | 16051 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c SS |
16052 | if (attr) |
16053 | { | |
16054 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; | |
16055 | } | |
0f5238ed TT |
16056 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
16057 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 16058 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 16059 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
16060 | break; |
16061 | case DW_TAG_subprogram: | |
16062 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
16063 | finish_block. */ | |
f1e6e072 | 16064 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 16065 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
16066 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
16067 | || cu->language == language_ada) | |
c906108c | 16068 | { |
2cfa0c8d JB |
16069 | /* Subprograms marked external are stored as a global symbol. |
16070 | Ada subprograms, whether marked external or not, are always | |
16071 | stored as a global symbol, because we want to be able to | |
16072 | access them globally. For instance, we want to be able | |
16073 | to break on a nested subprogram without having to | |
16074 | specify the context. */ | |
e37fd15a | 16075 | list_to_add = &global_symbols; |
c906108c SS |
16076 | } |
16077 | else | |
16078 | { | |
e37fd15a | 16079 | list_to_add = cu->list_in_scope; |
c906108c SS |
16080 | } |
16081 | break; | |
edb3359d DJ |
16082 | case DW_TAG_inlined_subroutine: |
16083 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
16084 | finish_block. */ | |
f1e6e072 | 16085 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 16086 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 16087 | list_to_add = cu->list_in_scope; |
edb3359d | 16088 | break; |
34eaf542 TT |
16089 | case DW_TAG_template_value_param: |
16090 | suppress_add = 1; | |
16091 | /* Fall through. */ | |
72929c62 | 16092 | case DW_TAG_constant: |
c906108c | 16093 | case DW_TAG_variable: |
254e6b9e | 16094 | case DW_TAG_member: |
0963b4bd MS |
16095 | /* Compilation with minimal debug info may result in |
16096 | variables with missing type entries. Change the | |
16097 | misleading `void' type to something sensible. */ | |
c906108c | 16098 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 16099 | SYMBOL_TYPE (sym) |
46bf5051 | 16100 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 16101 | |
e142c38c | 16102 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
16103 | /* In the case of DW_TAG_member, we should only be called for |
16104 | static const members. */ | |
16105 | if (die->tag == DW_TAG_member) | |
16106 | { | |
3863f96c DE |
16107 | /* dwarf2_add_field uses die_is_declaration, |
16108 | so we do the same. */ | |
254e6b9e DE |
16109 | gdb_assert (die_is_declaration (die, cu)); |
16110 | gdb_assert (attr); | |
16111 | } | |
c906108c SS |
16112 | if (attr) |
16113 | { | |
e7c27a73 | 16114 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 16115 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 16116 | if (!suppress_add) |
34eaf542 TT |
16117 | { |
16118 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 16119 | list_to_add = &global_symbols; |
34eaf542 | 16120 | else |
e37fd15a | 16121 | list_to_add = cu->list_in_scope; |
34eaf542 | 16122 | } |
c906108c SS |
16123 | break; |
16124 | } | |
e142c38c | 16125 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
16126 | if (attr) |
16127 | { | |
e7c27a73 | 16128 | var_decode_location (attr, sym, cu); |
e142c38c | 16129 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
16130 | |
16131 | /* Fortran explicitly imports any global symbols to the local | |
16132 | scope by DW_TAG_common_block. */ | |
16133 | if (cu->language == language_fortran && die->parent | |
16134 | && die->parent->tag == DW_TAG_common_block) | |
16135 | attr2 = NULL; | |
16136 | ||
caac4577 JG |
16137 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
16138 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
16139 | && !dwarf2_per_objfile->has_section_at_zero) | |
16140 | { | |
16141 | /* When a static variable is eliminated by the linker, | |
16142 | the corresponding debug information is not stripped | |
16143 | out, but the variable address is set to null; | |
16144 | do not add such variables into symbol table. */ | |
16145 | } | |
16146 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 16147 | { |
f55ee35c JK |
16148 | /* Workaround gfortran PR debug/40040 - it uses |
16149 | DW_AT_location for variables in -fPIC libraries which may | |
16150 | get overriden by other libraries/executable and get | |
16151 | a different address. Resolve it by the minimal symbol | |
16152 | which may come from inferior's executable using copy | |
16153 | relocation. Make this workaround only for gfortran as for | |
16154 | other compilers GDB cannot guess the minimal symbol | |
16155 | Fortran mangling kind. */ | |
16156 | if (cu->language == language_fortran && die->parent | |
16157 | && die->parent->tag == DW_TAG_module | |
16158 | && cu->producer | |
16159 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
f1e6e072 | 16160 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 16161 | |
1c809c68 TT |
16162 | /* A variable with DW_AT_external is never static, |
16163 | but it may be block-scoped. */ | |
16164 | list_to_add = (cu->list_in_scope == &file_symbols | |
16165 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 16166 | } |
c906108c | 16167 | else |
e37fd15a | 16168 | list_to_add = cu->list_in_scope; |
c906108c SS |
16169 | } |
16170 | else | |
16171 | { | |
16172 | /* We do not know the address of this symbol. | |
c5aa993b JM |
16173 | If it is an external symbol and we have type information |
16174 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
16175 | The address of the variable will then be determined from | |
16176 | the minimal symbol table whenever the variable is | |
16177 | referenced. */ | |
e142c38c | 16178 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
16179 | |
16180 | /* Fortran explicitly imports any global symbols to the local | |
16181 | scope by DW_TAG_common_block. */ | |
16182 | if (cu->language == language_fortran && die->parent | |
16183 | && die->parent->tag == DW_TAG_common_block) | |
16184 | { | |
16185 | /* SYMBOL_CLASS doesn't matter here because | |
16186 | read_common_block is going to reset it. */ | |
16187 | if (!suppress_add) | |
16188 | list_to_add = cu->list_in_scope; | |
16189 | } | |
16190 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
16191 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 16192 | { |
0fe7935b DJ |
16193 | /* A variable with DW_AT_external is never static, but it |
16194 | may be block-scoped. */ | |
16195 | list_to_add = (cu->list_in_scope == &file_symbols | |
16196 | ? &global_symbols : cu->list_in_scope); | |
16197 | ||
f1e6e072 | 16198 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 16199 | } |
442ddf59 JK |
16200 | else if (!die_is_declaration (die, cu)) |
16201 | { | |
16202 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
16203 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
16204 | if (!suppress_add) |
16205 | list_to_add = cu->list_in_scope; | |
442ddf59 | 16206 | } |
c906108c SS |
16207 | } |
16208 | break; | |
16209 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
16210 | /* If we are inside a function, mark this as an argument. If |
16211 | not, we might be looking at an argument to an inlined function | |
16212 | when we do not have enough information to show inlined frames; | |
16213 | pretend it's a local variable in that case so that the user can | |
16214 | still see it. */ | |
16215 | if (context_stack_depth > 0 | |
16216 | && context_stack[context_stack_depth - 1].name != NULL) | |
16217 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 16218 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
16219 | if (attr) |
16220 | { | |
e7c27a73 | 16221 | var_decode_location (attr, sym, cu); |
c906108c | 16222 | } |
e142c38c | 16223 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
16224 | if (attr) |
16225 | { | |
e7c27a73 | 16226 | dwarf2_const_value (attr, sym, cu); |
c906108c | 16227 | } |
f346a30d | 16228 | |
e37fd15a | 16229 | list_to_add = cu->list_in_scope; |
c906108c SS |
16230 | break; |
16231 | case DW_TAG_unspecified_parameters: | |
16232 | /* From varargs functions; gdb doesn't seem to have any | |
16233 | interest in this information, so just ignore it for now. | |
16234 | (FIXME?) */ | |
16235 | break; | |
34eaf542 TT |
16236 | case DW_TAG_template_type_param: |
16237 | suppress_add = 1; | |
16238 | /* Fall through. */ | |
c906108c | 16239 | case DW_TAG_class_type: |
680b30c7 | 16240 | case DW_TAG_interface_type: |
c906108c SS |
16241 | case DW_TAG_structure_type: |
16242 | case DW_TAG_union_type: | |
72019c9c | 16243 | case DW_TAG_set_type: |
c906108c | 16244 | case DW_TAG_enumeration_type: |
f1e6e072 | 16245 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 16246 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 16247 | |
63d06c5c | 16248 | { |
987504bb | 16249 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
16250 | really ever be static objects: otherwise, if you try |
16251 | to, say, break of a class's method and you're in a file | |
16252 | which doesn't mention that class, it won't work unless | |
16253 | the check for all static symbols in lookup_symbol_aux | |
16254 | saves you. See the OtherFileClass tests in | |
16255 | gdb.c++/namespace.exp. */ | |
16256 | ||
e37fd15a | 16257 | if (!suppress_add) |
34eaf542 | 16258 | { |
34eaf542 TT |
16259 | list_to_add = (cu->list_in_scope == &file_symbols |
16260 | && (cu->language == language_cplus | |
16261 | || cu->language == language_java) | |
16262 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 16263 | |
64382290 TT |
16264 | /* The semantics of C++ state that "struct foo { |
16265 | ... }" also defines a typedef for "foo". A Java | |
16266 | class declaration also defines a typedef for the | |
16267 | class. */ | |
16268 | if (cu->language == language_cplus | |
16269 | || cu->language == language_java | |
16270 | || cu->language == language_ada) | |
16271 | { | |
16272 | /* The symbol's name is already allocated along | |
16273 | with this objfile, so we don't need to | |
16274 | duplicate it for the type. */ | |
16275 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
16276 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
16277 | } | |
63d06c5c DC |
16278 | } |
16279 | } | |
c906108c SS |
16280 | break; |
16281 | case DW_TAG_typedef: | |
f1e6e072 | 16282 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 16283 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 16284 | list_to_add = cu->list_in_scope; |
63d06c5c | 16285 | break; |
c906108c | 16286 | case DW_TAG_base_type: |
a02abb62 | 16287 | case DW_TAG_subrange_type: |
f1e6e072 | 16288 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 16289 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 16290 | list_to_add = cu->list_in_scope; |
c906108c SS |
16291 | break; |
16292 | case DW_TAG_enumerator: | |
e142c38c | 16293 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
16294 | if (attr) |
16295 | { | |
e7c27a73 | 16296 | dwarf2_const_value (attr, sym, cu); |
c906108c | 16297 | } |
63d06c5c DC |
16298 | { |
16299 | /* NOTE: carlton/2003-11-10: See comment above in the | |
16300 | DW_TAG_class_type, etc. block. */ | |
16301 | ||
e142c38c | 16302 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
16303 | && (cu->language == language_cplus |
16304 | || cu->language == language_java) | |
e142c38c | 16305 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 16306 | } |
c906108c | 16307 | break; |
5c4e30ca | 16308 | case DW_TAG_namespace: |
f1e6e072 | 16309 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 16310 | list_to_add = &global_symbols; |
5c4e30ca | 16311 | break; |
4357ac6c | 16312 | case DW_TAG_common_block: |
f1e6e072 | 16313 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
16314 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
16315 | add_symbol_to_list (sym, cu->list_in_scope); | |
16316 | break; | |
c906108c SS |
16317 | default: |
16318 | /* Not a tag we recognize. Hopefully we aren't processing | |
16319 | trash data, but since we must specifically ignore things | |
16320 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 16321 | this point. */ |
e2e0b3e5 | 16322 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 16323 | dwarf_tag_name (die->tag)); |
c906108c SS |
16324 | break; |
16325 | } | |
df8a16a1 | 16326 | |
e37fd15a SW |
16327 | if (suppress_add) |
16328 | { | |
16329 | sym->hash_next = objfile->template_symbols; | |
16330 | objfile->template_symbols = sym; | |
16331 | list_to_add = NULL; | |
16332 | } | |
16333 | ||
16334 | if (list_to_add != NULL) | |
16335 | add_symbol_to_list (sym, list_to_add); | |
16336 | ||
df8a16a1 DJ |
16337 | /* For the benefit of old versions of GCC, check for anonymous |
16338 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 16339 | if (!cu->processing_has_namespace_info |
94af9270 | 16340 | && cu->language == language_cplus) |
a10964d1 | 16341 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
16342 | } |
16343 | return (sym); | |
16344 | } | |
16345 | ||
34eaf542 TT |
16346 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
16347 | ||
16348 | static struct symbol * | |
16349 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
16350 | { | |
16351 | return new_symbol_full (die, type, cu, NULL); | |
16352 | } | |
16353 | ||
98bfdba5 PA |
16354 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
16355 | zero-extend it as appropriate for the symbol's type. The DWARF | |
16356 | standard (v4) is not entirely clear about the meaning of using | |
16357 | DW_FORM_dataN for a constant with a signed type, where the type is | |
16358 | wider than the data. The conclusion of a discussion on the DWARF | |
16359 | list was that this is unspecified. We choose to always zero-extend | |
16360 | because that is the interpretation long in use by GCC. */ | |
c906108c | 16361 | |
98bfdba5 PA |
16362 | static gdb_byte * |
16363 | dwarf2_const_value_data (struct attribute *attr, struct type *type, | |
16364 | const char *name, struct obstack *obstack, | |
12df843f | 16365 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 16366 | { |
e7c27a73 | 16367 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
16368 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
16369 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
16370 | LONGEST l = DW_UNSND (attr); |
16371 | ||
16372 | if (bits < sizeof (*value) * 8) | |
16373 | { | |
16374 | l &= ((LONGEST) 1 << bits) - 1; | |
16375 | *value = l; | |
16376 | } | |
16377 | else if (bits == sizeof (*value) * 8) | |
16378 | *value = l; | |
16379 | else | |
16380 | { | |
16381 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
16382 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
16383 | return bytes; | |
16384 | } | |
16385 | ||
16386 | return NULL; | |
16387 | } | |
16388 | ||
16389 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
16390 | the value does not fit in *VALUE, set *BYTES - either already | |
16391 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
16392 | or, set *BATON, if we translated the constant to a location | |
16393 | expression. */ | |
16394 | ||
16395 | static void | |
16396 | dwarf2_const_value_attr (struct attribute *attr, struct type *type, | |
16397 | const char *name, struct obstack *obstack, | |
16398 | struct dwarf2_cu *cu, | |
d521ce57 | 16399 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
16400 | struct dwarf2_locexpr_baton **baton) |
16401 | { | |
16402 | struct objfile *objfile = cu->objfile; | |
16403 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 16404 | struct dwarf_block *blk; |
98bfdba5 PA |
16405 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
16406 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
16407 | ||
16408 | *value = 0; | |
16409 | *bytes = NULL; | |
16410 | *baton = NULL; | |
c906108c SS |
16411 | |
16412 | switch (attr->form) | |
16413 | { | |
16414 | case DW_FORM_addr: | |
3019eac3 | 16415 | case DW_FORM_GNU_addr_index: |
ac56253d | 16416 | { |
ac56253d TT |
16417 | gdb_byte *data; |
16418 | ||
98bfdba5 PA |
16419 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
16420 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 16421 | cu_header->addr_size, |
98bfdba5 | 16422 | TYPE_LENGTH (type)); |
ac56253d TT |
16423 | /* Symbols of this form are reasonably rare, so we just |
16424 | piggyback on the existing location code rather than writing | |
16425 | a new implementation of symbol_computed_ops. */ | |
98bfdba5 PA |
16426 | *baton = obstack_alloc (&objfile->objfile_obstack, |
16427 | sizeof (struct dwarf2_locexpr_baton)); | |
16428 | (*baton)->per_cu = cu->per_cu; | |
16429 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 16430 | |
98bfdba5 PA |
16431 | (*baton)->size = 2 + cu_header->addr_size; |
16432 | data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size); | |
16433 | (*baton)->data = data; | |
ac56253d TT |
16434 | |
16435 | data[0] = DW_OP_addr; | |
16436 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
16437 | byte_order, DW_ADDR (attr)); | |
16438 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 16439 | } |
c906108c | 16440 | break; |
4ac36638 | 16441 | case DW_FORM_string: |
93b5768b | 16442 | case DW_FORM_strp: |
3019eac3 | 16443 | case DW_FORM_GNU_str_index: |
36586728 | 16444 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
16445 | /* DW_STRING is already allocated on the objfile obstack, point |
16446 | directly to it. */ | |
d521ce57 | 16447 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 16448 | break; |
c906108c SS |
16449 | case DW_FORM_block1: |
16450 | case DW_FORM_block2: | |
16451 | case DW_FORM_block4: | |
16452 | case DW_FORM_block: | |
2dc7f7b3 | 16453 | case DW_FORM_exprloc: |
c906108c | 16454 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
16455 | if (TYPE_LENGTH (type) != blk->size) |
16456 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
16457 | TYPE_LENGTH (type)); | |
16458 | *bytes = blk->data; | |
c906108c | 16459 | break; |
2df3850c JM |
16460 | |
16461 | /* The DW_AT_const_value attributes are supposed to carry the | |
16462 | symbol's value "represented as it would be on the target | |
16463 | architecture." By the time we get here, it's already been | |
16464 | converted to host endianness, so we just need to sign- or | |
16465 | zero-extend it as appropriate. */ | |
16466 | case DW_FORM_data1: | |
3e43a32a MS |
16467 | *bytes = dwarf2_const_value_data (attr, type, name, |
16468 | obstack, cu, value, 8); | |
2df3850c | 16469 | break; |
c906108c | 16470 | case DW_FORM_data2: |
3e43a32a MS |
16471 | *bytes = dwarf2_const_value_data (attr, type, name, |
16472 | obstack, cu, value, 16); | |
2df3850c | 16473 | break; |
c906108c | 16474 | case DW_FORM_data4: |
3e43a32a MS |
16475 | *bytes = dwarf2_const_value_data (attr, type, name, |
16476 | obstack, cu, value, 32); | |
2df3850c | 16477 | break; |
c906108c | 16478 | case DW_FORM_data8: |
3e43a32a MS |
16479 | *bytes = dwarf2_const_value_data (attr, type, name, |
16480 | obstack, cu, value, 64); | |
2df3850c JM |
16481 | break; |
16482 | ||
c906108c | 16483 | case DW_FORM_sdata: |
98bfdba5 | 16484 | *value = DW_SND (attr); |
2df3850c JM |
16485 | break; |
16486 | ||
c906108c | 16487 | case DW_FORM_udata: |
98bfdba5 | 16488 | *value = DW_UNSND (attr); |
c906108c | 16489 | break; |
2df3850c | 16490 | |
c906108c | 16491 | default: |
4d3c2250 | 16492 | complaint (&symfile_complaints, |
e2e0b3e5 | 16493 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 16494 | dwarf_form_name (attr->form)); |
98bfdba5 | 16495 | *value = 0; |
c906108c SS |
16496 | break; |
16497 | } | |
16498 | } | |
16499 | ||
2df3850c | 16500 | |
98bfdba5 PA |
16501 | /* Copy constant value from an attribute to a symbol. */ |
16502 | ||
2df3850c | 16503 | static void |
98bfdba5 PA |
16504 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
16505 | struct dwarf2_cu *cu) | |
2df3850c | 16506 | { |
98bfdba5 PA |
16507 | struct objfile *objfile = cu->objfile; |
16508 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 16509 | LONGEST value; |
d521ce57 | 16510 | const gdb_byte *bytes; |
98bfdba5 | 16511 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 16512 | |
98bfdba5 PA |
16513 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
16514 | SYMBOL_PRINT_NAME (sym), | |
16515 | &objfile->objfile_obstack, cu, | |
16516 | &value, &bytes, &baton); | |
2df3850c | 16517 | |
98bfdba5 PA |
16518 | if (baton != NULL) |
16519 | { | |
98bfdba5 | 16520 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16521 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
16522 | } |
16523 | else if (bytes != NULL) | |
16524 | { | |
16525 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 16526 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
16527 | } |
16528 | else | |
16529 | { | |
16530 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 16531 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 16532 | } |
2df3850c JM |
16533 | } |
16534 | ||
c906108c SS |
16535 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
16536 | ||
16537 | static struct type * | |
e7c27a73 | 16538 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16539 | { |
c906108c | 16540 | struct attribute *type_attr; |
c906108c | 16541 | |
e142c38c | 16542 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
16543 | if (!type_attr) |
16544 | { | |
16545 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 16546 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 16547 | } |
348e048f | 16548 | |
673bfd45 | 16549 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16550 | } |
16551 | ||
b4ba55a1 JB |
16552 | /* True iff CU's producer generates GNAT Ada auxiliary information |
16553 | that allows to find parallel types through that information instead | |
16554 | of having to do expensive parallel lookups by type name. */ | |
16555 | ||
16556 | static int | |
16557 | need_gnat_info (struct dwarf2_cu *cu) | |
16558 | { | |
16559 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
16560 | of GNAT produces this auxiliary information, without any indication | |
16561 | that it is produced. Part of enhancing the FSF version of GNAT | |
16562 | to produce that information will be to put in place an indicator | |
16563 | that we can use in order to determine whether the descriptive type | |
16564 | info is available or not. One suggestion that has been made is | |
16565 | to use a new attribute, attached to the CU die. For now, assume | |
16566 | that the descriptive type info is not available. */ | |
16567 | return 0; | |
16568 | } | |
16569 | ||
b4ba55a1 JB |
16570 | /* Return the auxiliary type of the die in question using its |
16571 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
16572 | attribute is not present. */ | |
16573 | ||
16574 | static struct type * | |
16575 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
16576 | { | |
b4ba55a1 | 16577 | struct attribute *type_attr; |
b4ba55a1 JB |
16578 | |
16579 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
16580 | if (!type_attr) | |
16581 | return NULL; | |
16582 | ||
673bfd45 | 16583 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
16584 | } |
16585 | ||
16586 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
16587 | descriptive type accordingly. */ | |
16588 | ||
16589 | static void | |
16590 | set_descriptive_type (struct type *type, struct die_info *die, | |
16591 | struct dwarf2_cu *cu) | |
16592 | { | |
16593 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
16594 | ||
16595 | if (descriptive_type) | |
16596 | { | |
16597 | ALLOCATE_GNAT_AUX_TYPE (type); | |
16598 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
16599 | } | |
16600 | } | |
16601 | ||
c906108c SS |
16602 | /* Return the containing type of the die in question using its |
16603 | DW_AT_containing_type attribute. */ | |
16604 | ||
16605 | static struct type * | |
e7c27a73 | 16606 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16607 | { |
c906108c | 16608 | struct attribute *type_attr; |
c906108c | 16609 | |
e142c38c | 16610 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
16611 | if (!type_attr) |
16612 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
16613 | "[in module %s]"), cu->objfile->name); | |
16614 | ||
673bfd45 | 16615 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16616 | } |
16617 | ||
ac9ec31b DE |
16618 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
16619 | ||
16620 | static struct type * | |
16621 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
16622 | { | |
16623 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16624 | char *message, *saved; | |
16625 | ||
16626 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
16627 | objfile->name, | |
16628 | cu->header.offset.sect_off, | |
16629 | die->offset.sect_off); | |
16630 | saved = obstack_copy0 (&objfile->objfile_obstack, | |
16631 | message, strlen (message)); | |
16632 | xfree (message); | |
16633 | ||
16634 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
16635 | } | |
16636 | ||
673bfd45 | 16637 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
16638 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
16639 | DW_AT_containing_type. | |
673bfd45 DE |
16640 | If there is no type substitute an error marker. */ |
16641 | ||
c906108c | 16642 | static struct type * |
673bfd45 DE |
16643 | lookup_die_type (struct die_info *die, struct attribute *attr, |
16644 | struct dwarf2_cu *cu) | |
c906108c | 16645 | { |
bb5ed363 | 16646 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
16647 | struct type *this_type; |
16648 | ||
ac9ec31b DE |
16649 | gdb_assert (attr->name == DW_AT_type |
16650 | || attr->name == DW_AT_GNAT_descriptive_type | |
16651 | || attr->name == DW_AT_containing_type); | |
16652 | ||
673bfd45 DE |
16653 | /* First see if we have it cached. */ |
16654 | ||
36586728 TT |
16655 | if (attr->form == DW_FORM_GNU_ref_alt) |
16656 | { | |
16657 | struct dwarf2_per_cu_data *per_cu; | |
16658 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
16659 | ||
16660 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
16661 | this_type = get_die_type_at_offset (offset, per_cu); | |
16662 | } | |
16663 | else if (is_ref_attr (attr)) | |
673bfd45 | 16664 | { |
b64f50a1 | 16665 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
16666 | |
16667 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
16668 | } | |
55f1336d | 16669 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 16670 | { |
ac9ec31b | 16671 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 16672 | |
ac9ec31b | 16673 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
16674 | } |
16675 | else | |
16676 | { | |
ac9ec31b DE |
16677 | complaint (&symfile_complaints, |
16678 | _("Dwarf Error: Bad type attribute %s in DIE" | |
16679 | " at 0x%x [in module %s]"), | |
16680 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
16681 | objfile->name); | |
16682 | return build_error_marker_type (cu, die); | |
673bfd45 DE |
16683 | } |
16684 | ||
16685 | /* If not cached we need to read it in. */ | |
16686 | ||
16687 | if (this_type == NULL) | |
16688 | { | |
ac9ec31b | 16689 | struct die_info *type_die = NULL; |
673bfd45 DE |
16690 | struct dwarf2_cu *type_cu = cu; |
16691 | ||
ac9ec31b DE |
16692 | if (is_ref_attr (attr)) |
16693 | type_die = follow_die_ref (die, attr, &type_cu); | |
16694 | if (type_die == NULL) | |
16695 | return build_error_marker_type (cu, die); | |
16696 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
16697 | from an inter-CU reference and the type's CU got expanded before |
16698 | ours. */ | |
ac9ec31b | 16699 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
16700 | } |
16701 | ||
16702 | /* If we still don't have a type use an error marker. */ | |
16703 | ||
16704 | if (this_type == NULL) | |
ac9ec31b | 16705 | return build_error_marker_type (cu, die); |
673bfd45 | 16706 | |
f792889a | 16707 | return this_type; |
c906108c SS |
16708 | } |
16709 | ||
673bfd45 DE |
16710 | /* Return the type in DIE, CU. |
16711 | Returns NULL for invalid types. | |
16712 | ||
02142a6c | 16713 | This first does a lookup in die_type_hash, |
673bfd45 DE |
16714 | and only reads the die in if necessary. |
16715 | ||
16716 | NOTE: This can be called when reading in partial or full symbols. */ | |
16717 | ||
f792889a | 16718 | static struct type * |
e7c27a73 | 16719 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16720 | { |
f792889a DJ |
16721 | struct type *this_type; |
16722 | ||
16723 | this_type = get_die_type (die, cu); | |
16724 | if (this_type) | |
16725 | return this_type; | |
16726 | ||
673bfd45 DE |
16727 | return read_type_die_1 (die, cu); |
16728 | } | |
16729 | ||
16730 | /* Read the type in DIE, CU. | |
16731 | Returns NULL for invalid types. */ | |
16732 | ||
16733 | static struct type * | |
16734 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
16735 | { | |
16736 | struct type *this_type = NULL; | |
16737 | ||
c906108c SS |
16738 | switch (die->tag) |
16739 | { | |
16740 | case DW_TAG_class_type: | |
680b30c7 | 16741 | case DW_TAG_interface_type: |
c906108c SS |
16742 | case DW_TAG_structure_type: |
16743 | case DW_TAG_union_type: | |
f792889a | 16744 | this_type = read_structure_type (die, cu); |
c906108c SS |
16745 | break; |
16746 | case DW_TAG_enumeration_type: | |
f792889a | 16747 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
16748 | break; |
16749 | case DW_TAG_subprogram: | |
16750 | case DW_TAG_subroutine_type: | |
edb3359d | 16751 | case DW_TAG_inlined_subroutine: |
f792889a | 16752 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
16753 | break; |
16754 | case DW_TAG_array_type: | |
f792889a | 16755 | this_type = read_array_type (die, cu); |
c906108c | 16756 | break; |
72019c9c | 16757 | case DW_TAG_set_type: |
f792889a | 16758 | this_type = read_set_type (die, cu); |
72019c9c | 16759 | break; |
c906108c | 16760 | case DW_TAG_pointer_type: |
f792889a | 16761 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
16762 | break; |
16763 | case DW_TAG_ptr_to_member_type: | |
f792889a | 16764 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
16765 | break; |
16766 | case DW_TAG_reference_type: | |
f792889a | 16767 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
16768 | break; |
16769 | case DW_TAG_const_type: | |
f792889a | 16770 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
16771 | break; |
16772 | case DW_TAG_volatile_type: | |
f792889a | 16773 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 16774 | break; |
06d66ee9 TT |
16775 | case DW_TAG_restrict_type: |
16776 | this_type = read_tag_restrict_type (die, cu); | |
16777 | break; | |
c906108c | 16778 | case DW_TAG_string_type: |
f792889a | 16779 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
16780 | break; |
16781 | case DW_TAG_typedef: | |
f792889a | 16782 | this_type = read_typedef (die, cu); |
c906108c | 16783 | break; |
a02abb62 | 16784 | case DW_TAG_subrange_type: |
f792889a | 16785 | this_type = read_subrange_type (die, cu); |
a02abb62 | 16786 | break; |
c906108c | 16787 | case DW_TAG_base_type: |
f792889a | 16788 | this_type = read_base_type (die, cu); |
c906108c | 16789 | break; |
81a17f79 | 16790 | case DW_TAG_unspecified_type: |
f792889a | 16791 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 16792 | break; |
0114d602 DJ |
16793 | case DW_TAG_namespace: |
16794 | this_type = read_namespace_type (die, cu); | |
16795 | break; | |
f55ee35c JK |
16796 | case DW_TAG_module: |
16797 | this_type = read_module_type (die, cu); | |
16798 | break; | |
c906108c | 16799 | default: |
3e43a32a MS |
16800 | complaint (&symfile_complaints, |
16801 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 16802 | dwarf_tag_name (die->tag)); |
c906108c SS |
16803 | break; |
16804 | } | |
63d06c5c | 16805 | |
f792889a | 16806 | return this_type; |
63d06c5c DC |
16807 | } |
16808 | ||
abc72ce4 DE |
16809 | /* See if we can figure out if the class lives in a namespace. We do |
16810 | this by looking for a member function; its demangled name will | |
16811 | contain namespace info, if there is any. | |
16812 | Return the computed name or NULL. | |
16813 | Space for the result is allocated on the objfile's obstack. | |
16814 | This is the full-die version of guess_partial_die_structure_name. | |
16815 | In this case we know DIE has no useful parent. */ | |
16816 | ||
16817 | static char * | |
16818 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
16819 | { | |
16820 | struct die_info *spec_die; | |
16821 | struct dwarf2_cu *spec_cu; | |
16822 | struct die_info *child; | |
16823 | ||
16824 | spec_cu = cu; | |
16825 | spec_die = die_specification (die, &spec_cu); | |
16826 | if (spec_die != NULL) | |
16827 | { | |
16828 | die = spec_die; | |
16829 | cu = spec_cu; | |
16830 | } | |
16831 | ||
16832 | for (child = die->child; | |
16833 | child != NULL; | |
16834 | child = child->sibling) | |
16835 | { | |
16836 | if (child->tag == DW_TAG_subprogram) | |
16837 | { | |
16838 | struct attribute *attr; | |
16839 | ||
16840 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
16841 | if (attr == NULL) | |
16842 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
16843 | if (attr != NULL) | |
16844 | { | |
16845 | char *actual_name | |
16846 | = language_class_name_from_physname (cu->language_defn, | |
16847 | DW_STRING (attr)); | |
16848 | char *name = NULL; | |
16849 | ||
16850 | if (actual_name != NULL) | |
16851 | { | |
15d034d0 | 16852 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
16853 | |
16854 | if (die_name != NULL | |
16855 | && strcmp (die_name, actual_name) != 0) | |
16856 | { | |
16857 | /* Strip off the class name from the full name. | |
16858 | We want the prefix. */ | |
16859 | int die_name_len = strlen (die_name); | |
16860 | int actual_name_len = strlen (actual_name); | |
16861 | ||
16862 | /* Test for '::' as a sanity check. */ | |
16863 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
16864 | && actual_name[actual_name_len |
16865 | - die_name_len - 1] == ':') | |
abc72ce4 | 16866 | name = |
10f0c4bb TT |
16867 | obstack_copy0 (&cu->objfile->objfile_obstack, |
16868 | actual_name, | |
16869 | actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
16870 | } |
16871 | } | |
16872 | xfree (actual_name); | |
16873 | return name; | |
16874 | } | |
16875 | } | |
16876 | } | |
16877 | ||
16878 | return NULL; | |
16879 | } | |
16880 | ||
96408a79 SA |
16881 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
16882 | prefix part in such case. See | |
16883 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16884 | ||
16885 | static char * | |
16886 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
16887 | { | |
16888 | struct attribute *attr; | |
16889 | char *base; | |
16890 | ||
16891 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
16892 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
16893 | return NULL; | |
16894 | ||
16895 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
16896 | if (attr != NULL && DW_STRING (attr) != NULL) | |
16897 | return NULL; | |
16898 | ||
16899 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
16900 | if (attr == NULL) | |
16901 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
16902 | if (attr == NULL || DW_STRING (attr) == NULL) | |
16903 | return NULL; | |
16904 | ||
16905 | /* dwarf2_name had to be already called. */ | |
16906 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
16907 | ||
16908 | /* Strip the base name, keep any leading namespaces/classes. */ | |
16909 | base = strrchr (DW_STRING (attr), ':'); | |
16910 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
16911 | return ""; | |
16912 | ||
10f0c4bb TT |
16913 | return obstack_copy0 (&cu->objfile->objfile_obstack, |
16914 | DW_STRING (attr), &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
16915 | } |
16916 | ||
fdde2d81 | 16917 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 16918 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 16919 | |
0114d602 DJ |
16920 | For example, if we're within the method foo() in the following |
16921 | code: | |
16922 | ||
16923 | namespace N { | |
16924 | class C { | |
16925 | void foo () { | |
16926 | } | |
16927 | }; | |
16928 | } | |
16929 | ||
16930 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 16931 | |
0d5cff50 | 16932 | static const char * |
e142c38c | 16933 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 16934 | { |
0114d602 DJ |
16935 | struct die_info *parent, *spec_die; |
16936 | struct dwarf2_cu *spec_cu; | |
16937 | struct type *parent_type; | |
96408a79 | 16938 | char *retval; |
63d06c5c | 16939 | |
f55ee35c JK |
16940 | if (cu->language != language_cplus && cu->language != language_java |
16941 | && cu->language != language_fortran) | |
0114d602 DJ |
16942 | return ""; |
16943 | ||
96408a79 SA |
16944 | retval = anonymous_struct_prefix (die, cu); |
16945 | if (retval) | |
16946 | return retval; | |
16947 | ||
0114d602 DJ |
16948 | /* We have to be careful in the presence of DW_AT_specification. |
16949 | For example, with GCC 3.4, given the code | |
16950 | ||
16951 | namespace N { | |
16952 | void foo() { | |
16953 | // Definition of N::foo. | |
16954 | } | |
16955 | } | |
16956 | ||
16957 | then we'll have a tree of DIEs like this: | |
16958 | ||
16959 | 1: DW_TAG_compile_unit | |
16960 | 2: DW_TAG_namespace // N | |
16961 | 3: DW_TAG_subprogram // declaration of N::foo | |
16962 | 4: DW_TAG_subprogram // definition of N::foo | |
16963 | DW_AT_specification // refers to die #3 | |
16964 | ||
16965 | Thus, when processing die #4, we have to pretend that we're in | |
16966 | the context of its DW_AT_specification, namely the contex of die | |
16967 | #3. */ | |
16968 | spec_cu = cu; | |
16969 | spec_die = die_specification (die, &spec_cu); | |
16970 | if (spec_die == NULL) | |
16971 | parent = die->parent; | |
16972 | else | |
63d06c5c | 16973 | { |
0114d602 DJ |
16974 | parent = spec_die->parent; |
16975 | cu = spec_cu; | |
63d06c5c | 16976 | } |
0114d602 DJ |
16977 | |
16978 | if (parent == NULL) | |
16979 | return ""; | |
98bfdba5 PA |
16980 | else if (parent->building_fullname) |
16981 | { | |
16982 | const char *name; | |
16983 | const char *parent_name; | |
16984 | ||
16985 | /* It has been seen on RealView 2.2 built binaries, | |
16986 | DW_TAG_template_type_param types actually _defined_ as | |
16987 | children of the parent class: | |
16988 | ||
16989 | enum E {}; | |
16990 | template class <class Enum> Class{}; | |
16991 | Class<enum E> class_e; | |
16992 | ||
16993 | 1: DW_TAG_class_type (Class) | |
16994 | 2: DW_TAG_enumeration_type (E) | |
16995 | 3: DW_TAG_enumerator (enum1:0) | |
16996 | 3: DW_TAG_enumerator (enum2:1) | |
16997 | ... | |
16998 | 2: DW_TAG_template_type_param | |
16999 | DW_AT_type DW_FORM_ref_udata (E) | |
17000 | ||
17001 | Besides being broken debug info, it can put GDB into an | |
17002 | infinite loop. Consider: | |
17003 | ||
17004 | When we're building the full name for Class<E>, we'll start | |
17005 | at Class, and go look over its template type parameters, | |
17006 | finding E. We'll then try to build the full name of E, and | |
17007 | reach here. We're now trying to build the full name of E, | |
17008 | and look over the parent DIE for containing scope. In the | |
17009 | broken case, if we followed the parent DIE of E, we'd again | |
17010 | find Class, and once again go look at its template type | |
17011 | arguments, etc., etc. Simply don't consider such parent die | |
17012 | as source-level parent of this die (it can't be, the language | |
17013 | doesn't allow it), and break the loop here. */ | |
17014 | name = dwarf2_name (die, cu); | |
17015 | parent_name = dwarf2_name (parent, cu); | |
17016 | complaint (&symfile_complaints, | |
17017 | _("template param type '%s' defined within parent '%s'"), | |
17018 | name ? name : "<unknown>", | |
17019 | parent_name ? parent_name : "<unknown>"); | |
17020 | return ""; | |
17021 | } | |
63d06c5c | 17022 | else |
0114d602 DJ |
17023 | switch (parent->tag) |
17024 | { | |
63d06c5c | 17025 | case DW_TAG_namespace: |
0114d602 | 17026 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
17027 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
17028 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
17029 | Work around this problem here. */ | |
17030 | if (cu->language == language_cplus | |
17031 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
17032 | return ""; | |
0114d602 DJ |
17033 | /* We give a name to even anonymous namespaces. */ |
17034 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 17035 | case DW_TAG_class_type: |
680b30c7 | 17036 | case DW_TAG_interface_type: |
63d06c5c | 17037 | case DW_TAG_structure_type: |
0114d602 | 17038 | case DW_TAG_union_type: |
f55ee35c | 17039 | case DW_TAG_module: |
0114d602 DJ |
17040 | parent_type = read_type_die (parent, cu); |
17041 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
17042 | return TYPE_TAG_NAME (parent_type); | |
17043 | else | |
17044 | /* An anonymous structure is only allowed non-static data | |
17045 | members; no typedefs, no member functions, et cetera. | |
17046 | So it does not need a prefix. */ | |
17047 | return ""; | |
abc72ce4 | 17048 | case DW_TAG_compile_unit: |
95554aad | 17049 | case DW_TAG_partial_unit: |
abc72ce4 DE |
17050 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
17051 | if (cu->language == language_cplus | |
8b70b953 | 17052 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17053 | && die->child != NULL |
17054 | && (die->tag == DW_TAG_class_type | |
17055 | || die->tag == DW_TAG_structure_type | |
17056 | || die->tag == DW_TAG_union_type)) | |
17057 | { | |
17058 | char *name = guess_full_die_structure_name (die, cu); | |
17059 | if (name != NULL) | |
17060 | return name; | |
17061 | } | |
17062 | return ""; | |
63d06c5c | 17063 | default: |
8176b9b8 | 17064 | return determine_prefix (parent, cu); |
63d06c5c | 17065 | } |
63d06c5c DC |
17066 | } |
17067 | ||
3e43a32a MS |
17068 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
17069 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
17070 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
17071 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
17072 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 17073 | |
f55ee35c | 17074 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
17075 | |
17076 | static char * | |
f55ee35c JK |
17077 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
17078 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 17079 | { |
f55ee35c | 17080 | const char *lead = ""; |
5c315b68 | 17081 | const char *sep; |
63d06c5c | 17082 | |
3e43a32a MS |
17083 | if (suffix == NULL || suffix[0] == '\0' |
17084 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
17085 | sep = ""; |
17086 | else if (cu->language == language_java) | |
17087 | sep = "."; | |
f55ee35c JK |
17088 | else if (cu->language == language_fortran && physname) |
17089 | { | |
17090 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
17091 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
17092 | ||
17093 | lead = "__"; | |
17094 | sep = "_MOD_"; | |
17095 | } | |
987504bb JJ |
17096 | else |
17097 | sep = "::"; | |
63d06c5c | 17098 | |
6dd47d34 DE |
17099 | if (prefix == NULL) |
17100 | prefix = ""; | |
17101 | if (suffix == NULL) | |
17102 | suffix = ""; | |
17103 | ||
987504bb JJ |
17104 | if (obs == NULL) |
17105 | { | |
3e43a32a MS |
17106 | char *retval |
17107 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 17108 | |
f55ee35c JK |
17109 | strcpy (retval, lead); |
17110 | strcat (retval, prefix); | |
6dd47d34 DE |
17111 | strcat (retval, sep); |
17112 | strcat (retval, suffix); | |
63d06c5c DC |
17113 | return retval; |
17114 | } | |
987504bb JJ |
17115 | else |
17116 | { | |
17117 | /* We have an obstack. */ | |
f55ee35c | 17118 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 17119 | } |
63d06c5c DC |
17120 | } |
17121 | ||
c906108c SS |
17122 | /* Return sibling of die, NULL if no sibling. */ |
17123 | ||
f9aca02d | 17124 | static struct die_info * |
fba45db2 | 17125 | sibling_die (struct die_info *die) |
c906108c | 17126 | { |
639d11d3 | 17127 | return die->sibling; |
c906108c SS |
17128 | } |
17129 | ||
71c25dea TT |
17130 | /* Get name of a die, return NULL if not found. */ |
17131 | ||
15d034d0 TT |
17132 | static const char * |
17133 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
17134 | struct obstack *obstack) |
17135 | { | |
17136 | if (name && cu->language == language_cplus) | |
17137 | { | |
17138 | char *canon_name = cp_canonicalize_string (name); | |
17139 | ||
17140 | if (canon_name != NULL) | |
17141 | { | |
17142 | if (strcmp (canon_name, name) != 0) | |
10f0c4bb | 17143 | name = obstack_copy0 (obstack, canon_name, strlen (canon_name)); |
71c25dea TT |
17144 | xfree (canon_name); |
17145 | } | |
17146 | } | |
17147 | ||
17148 | return name; | |
c906108c SS |
17149 | } |
17150 | ||
9219021c DC |
17151 | /* Get name of a die, return NULL if not found. */ |
17152 | ||
15d034d0 | 17153 | static const char * |
e142c38c | 17154 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
17155 | { |
17156 | struct attribute *attr; | |
17157 | ||
e142c38c | 17158 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
17159 | if ((!attr || !DW_STRING (attr)) |
17160 | && die->tag != DW_TAG_class_type | |
17161 | && die->tag != DW_TAG_interface_type | |
17162 | && die->tag != DW_TAG_structure_type | |
17163 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
17164 | return NULL; |
17165 | ||
17166 | switch (die->tag) | |
17167 | { | |
17168 | case DW_TAG_compile_unit: | |
95554aad | 17169 | case DW_TAG_partial_unit: |
71c25dea TT |
17170 | /* Compilation units have a DW_AT_name that is a filename, not |
17171 | a source language identifier. */ | |
17172 | case DW_TAG_enumeration_type: | |
17173 | case DW_TAG_enumerator: | |
17174 | /* These tags always have simple identifiers already; no need | |
17175 | to canonicalize them. */ | |
17176 | return DW_STRING (attr); | |
907af001 | 17177 | |
418835cc KS |
17178 | case DW_TAG_subprogram: |
17179 | /* Java constructors will all be named "<init>", so return | |
17180 | the class name when we see this special case. */ | |
17181 | if (cu->language == language_java | |
17182 | && DW_STRING (attr) != NULL | |
17183 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
17184 | { | |
17185 | struct dwarf2_cu *spec_cu = cu; | |
17186 | struct die_info *spec_die; | |
17187 | ||
17188 | /* GCJ will output '<init>' for Java constructor names. | |
17189 | For this special case, return the name of the parent class. */ | |
17190 | ||
17191 | /* GCJ may output suprogram DIEs with AT_specification set. | |
17192 | If so, use the name of the specified DIE. */ | |
17193 | spec_die = die_specification (die, &spec_cu); | |
17194 | if (spec_die != NULL) | |
17195 | return dwarf2_name (spec_die, spec_cu); | |
17196 | ||
17197 | do | |
17198 | { | |
17199 | die = die->parent; | |
17200 | if (die->tag == DW_TAG_class_type) | |
17201 | return dwarf2_name (die, cu); | |
17202 | } | |
95554aad TT |
17203 | while (die->tag != DW_TAG_compile_unit |
17204 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 17205 | } |
907af001 UW |
17206 | break; |
17207 | ||
17208 | case DW_TAG_class_type: | |
17209 | case DW_TAG_interface_type: | |
17210 | case DW_TAG_structure_type: | |
17211 | case DW_TAG_union_type: | |
17212 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
17213 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
17214 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
17215 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
17216 | if (attr && DW_STRING (attr) |
17217 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
17218 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 17219 | return NULL; |
53832f31 TT |
17220 | |
17221 | /* GCC might emit a nameless typedef that has a linkage name. See | |
17222 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17223 | if (!attr || DW_STRING (attr) == NULL) | |
17224 | { | |
df5c6c50 | 17225 | char *demangled = NULL; |
53832f31 TT |
17226 | |
17227 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
17228 | if (attr == NULL) | |
17229 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
17230 | ||
17231 | if (attr == NULL || DW_STRING (attr) == NULL) | |
17232 | return NULL; | |
17233 | ||
df5c6c50 JK |
17234 | /* Avoid demangling DW_STRING (attr) the second time on a second |
17235 | call for the same DIE. */ | |
17236 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 17237 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
17238 | |
17239 | if (demangled) | |
17240 | { | |
96408a79 SA |
17241 | char *base; |
17242 | ||
53832f31 | 17243 | /* FIXME: we already did this for the partial symbol... */ |
10f0c4bb TT |
17244 | DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack, |
17245 | demangled, strlen (demangled)); | |
53832f31 TT |
17246 | DW_STRING_IS_CANONICAL (attr) = 1; |
17247 | xfree (demangled); | |
96408a79 SA |
17248 | |
17249 | /* Strip any leading namespaces/classes, keep only the base name. | |
17250 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17251 | base = strrchr (DW_STRING (attr), ':'); | |
17252 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
17253 | return &base[1]; | |
17254 | else | |
17255 | return DW_STRING (attr); | |
53832f31 TT |
17256 | } |
17257 | } | |
907af001 UW |
17258 | break; |
17259 | ||
71c25dea | 17260 | default: |
907af001 UW |
17261 | break; |
17262 | } | |
17263 | ||
17264 | if (!DW_STRING_IS_CANONICAL (attr)) | |
17265 | { | |
17266 | DW_STRING (attr) | |
17267 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
17268 | &cu->objfile->objfile_obstack); | |
17269 | DW_STRING_IS_CANONICAL (attr) = 1; | |
71c25dea | 17270 | } |
907af001 | 17271 | return DW_STRING (attr); |
9219021c DC |
17272 | } |
17273 | ||
17274 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
17275 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
17276 | containing the return value on output. */ | |
9219021c DC |
17277 | |
17278 | static struct die_info * | |
f2f0e013 | 17279 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
17280 | { |
17281 | struct attribute *attr; | |
9219021c | 17282 | |
f2f0e013 | 17283 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
17284 | if (attr == NULL) |
17285 | return NULL; | |
17286 | ||
f2f0e013 | 17287 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
17288 | } |
17289 | ||
c906108c SS |
17290 | /* Convert a DIE tag into its string name. */ |
17291 | ||
f39c6ffd | 17292 | static const char * |
aa1ee363 | 17293 | dwarf_tag_name (unsigned tag) |
c906108c | 17294 | { |
f39c6ffd TT |
17295 | const char *name = get_DW_TAG_name (tag); |
17296 | ||
17297 | if (name == NULL) | |
17298 | return "DW_TAG_<unknown>"; | |
17299 | ||
17300 | return name; | |
c906108c SS |
17301 | } |
17302 | ||
17303 | /* Convert a DWARF attribute code into its string name. */ | |
17304 | ||
f39c6ffd | 17305 | static const char * |
aa1ee363 | 17306 | dwarf_attr_name (unsigned attr) |
c906108c | 17307 | { |
f39c6ffd TT |
17308 | const char *name; |
17309 | ||
c764a876 | 17310 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
17311 | if (attr == DW_AT_MIPS_fde) |
17312 | return "DW_AT_MIPS_fde"; | |
17313 | #else | |
17314 | if (attr == DW_AT_HP_block_index) | |
17315 | return "DW_AT_HP_block_index"; | |
c764a876 | 17316 | #endif |
f39c6ffd TT |
17317 | |
17318 | name = get_DW_AT_name (attr); | |
17319 | ||
17320 | if (name == NULL) | |
17321 | return "DW_AT_<unknown>"; | |
17322 | ||
17323 | return name; | |
c906108c SS |
17324 | } |
17325 | ||
17326 | /* Convert a DWARF value form code into its string name. */ | |
17327 | ||
f39c6ffd | 17328 | static const char * |
aa1ee363 | 17329 | dwarf_form_name (unsigned form) |
c906108c | 17330 | { |
f39c6ffd TT |
17331 | const char *name = get_DW_FORM_name (form); |
17332 | ||
17333 | if (name == NULL) | |
17334 | return "DW_FORM_<unknown>"; | |
17335 | ||
17336 | return name; | |
c906108c SS |
17337 | } |
17338 | ||
17339 | static char * | |
fba45db2 | 17340 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
17341 | { |
17342 | if (mybool) | |
17343 | return "TRUE"; | |
17344 | else | |
17345 | return "FALSE"; | |
17346 | } | |
17347 | ||
17348 | /* Convert a DWARF type code into its string name. */ | |
17349 | ||
f39c6ffd | 17350 | static const char * |
aa1ee363 | 17351 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 17352 | { |
f39c6ffd | 17353 | const char *name = get_DW_ATE_name (enc); |
c906108c | 17354 | |
f39c6ffd TT |
17355 | if (name == NULL) |
17356 | return "DW_ATE_<unknown>"; | |
c906108c | 17357 | |
f39c6ffd | 17358 | return name; |
c906108c | 17359 | } |
c906108c | 17360 | |
f9aca02d | 17361 | static void |
d97bc12b | 17362 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
17363 | { |
17364 | unsigned int i; | |
17365 | ||
d97bc12b DE |
17366 | print_spaces (indent, f); |
17367 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 17368 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
17369 | |
17370 | if (die->parent != NULL) | |
17371 | { | |
17372 | print_spaces (indent, f); | |
17373 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 17374 | die->parent->offset.sect_off); |
d97bc12b DE |
17375 | } |
17376 | ||
17377 | print_spaces (indent, f); | |
17378 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 17379 | dwarf_bool_name (die->child != NULL)); |
c906108c | 17380 | |
d97bc12b DE |
17381 | print_spaces (indent, f); |
17382 | fprintf_unfiltered (f, " attributes:\n"); | |
17383 | ||
c906108c SS |
17384 | for (i = 0; i < die->num_attrs; ++i) |
17385 | { | |
d97bc12b DE |
17386 | print_spaces (indent, f); |
17387 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
17388 | dwarf_attr_name (die->attrs[i].name), |
17389 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 17390 | |
c906108c SS |
17391 | switch (die->attrs[i].form) |
17392 | { | |
c906108c | 17393 | case DW_FORM_addr: |
3019eac3 | 17394 | case DW_FORM_GNU_addr_index: |
d97bc12b | 17395 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 17396 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
17397 | break; |
17398 | case DW_FORM_block2: | |
17399 | case DW_FORM_block4: | |
17400 | case DW_FORM_block: | |
17401 | case DW_FORM_block1: | |
56eb65bd SP |
17402 | fprintf_unfiltered (f, "block: size %s", |
17403 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 17404 | break; |
2dc7f7b3 | 17405 | case DW_FORM_exprloc: |
56eb65bd SP |
17406 | fprintf_unfiltered (f, "expression: size %s", |
17407 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 17408 | break; |
4568ecf9 DE |
17409 | case DW_FORM_ref_addr: |
17410 | fprintf_unfiltered (f, "ref address: "); | |
17411 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17412 | break; | |
36586728 TT |
17413 | case DW_FORM_GNU_ref_alt: |
17414 | fprintf_unfiltered (f, "alt ref address: "); | |
17415 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17416 | break; | |
10b3939b DJ |
17417 | case DW_FORM_ref1: |
17418 | case DW_FORM_ref2: | |
17419 | case DW_FORM_ref4: | |
4568ecf9 DE |
17420 | case DW_FORM_ref8: |
17421 | case DW_FORM_ref_udata: | |
d97bc12b | 17422 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 17423 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 17424 | break; |
c906108c SS |
17425 | case DW_FORM_data1: |
17426 | case DW_FORM_data2: | |
17427 | case DW_FORM_data4: | |
ce5d95e1 | 17428 | case DW_FORM_data8: |
c906108c SS |
17429 | case DW_FORM_udata: |
17430 | case DW_FORM_sdata: | |
43bbcdc2 PH |
17431 | fprintf_unfiltered (f, "constant: %s", |
17432 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 17433 | break; |
2dc7f7b3 TT |
17434 | case DW_FORM_sec_offset: |
17435 | fprintf_unfiltered (f, "section offset: %s", | |
17436 | pulongest (DW_UNSND (&die->attrs[i]))); | |
17437 | break; | |
55f1336d | 17438 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
17439 | fprintf_unfiltered (f, "signature: %s", |
17440 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 17441 | break; |
c906108c | 17442 | case DW_FORM_string: |
4bdf3d34 | 17443 | case DW_FORM_strp: |
3019eac3 | 17444 | case DW_FORM_GNU_str_index: |
36586728 | 17445 | case DW_FORM_GNU_strp_alt: |
8285870a | 17446 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 17447 | DW_STRING (&die->attrs[i]) |
8285870a JK |
17448 | ? DW_STRING (&die->attrs[i]) : "", |
17449 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
17450 | break; |
17451 | case DW_FORM_flag: | |
17452 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 17453 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 17454 | else |
d97bc12b | 17455 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 17456 | break; |
2dc7f7b3 TT |
17457 | case DW_FORM_flag_present: |
17458 | fprintf_unfiltered (f, "flag: TRUE"); | |
17459 | break; | |
a8329558 | 17460 | case DW_FORM_indirect: |
0963b4bd MS |
17461 | /* The reader will have reduced the indirect form to |
17462 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
17463 | fprintf_unfiltered (f, |
17464 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 17465 | break; |
c906108c | 17466 | default: |
d97bc12b | 17467 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 17468 | die->attrs[i].form); |
d97bc12b | 17469 | break; |
c906108c | 17470 | } |
d97bc12b | 17471 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
17472 | } |
17473 | } | |
17474 | ||
f9aca02d | 17475 | static void |
d97bc12b | 17476 | dump_die_for_error (struct die_info *die) |
c906108c | 17477 | { |
d97bc12b DE |
17478 | dump_die_shallow (gdb_stderr, 0, die); |
17479 | } | |
17480 | ||
17481 | static void | |
17482 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
17483 | { | |
17484 | int indent = level * 4; | |
17485 | ||
17486 | gdb_assert (die != NULL); | |
17487 | ||
17488 | if (level >= max_level) | |
17489 | return; | |
17490 | ||
17491 | dump_die_shallow (f, indent, die); | |
17492 | ||
17493 | if (die->child != NULL) | |
c906108c | 17494 | { |
d97bc12b DE |
17495 | print_spaces (indent, f); |
17496 | fprintf_unfiltered (f, " Children:"); | |
17497 | if (level + 1 < max_level) | |
17498 | { | |
17499 | fprintf_unfiltered (f, "\n"); | |
17500 | dump_die_1 (f, level + 1, max_level, die->child); | |
17501 | } | |
17502 | else | |
17503 | { | |
3e43a32a MS |
17504 | fprintf_unfiltered (f, |
17505 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
17506 | } |
17507 | } | |
17508 | ||
17509 | if (die->sibling != NULL && level > 0) | |
17510 | { | |
17511 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
17512 | } |
17513 | } | |
17514 | ||
d97bc12b DE |
17515 | /* This is called from the pdie macro in gdbinit.in. |
17516 | It's not static so gcc will keep a copy callable from gdb. */ | |
17517 | ||
17518 | void | |
17519 | dump_die (struct die_info *die, int max_level) | |
17520 | { | |
17521 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
17522 | } | |
17523 | ||
f9aca02d | 17524 | static void |
51545339 | 17525 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17526 | { |
51545339 | 17527 | void **slot; |
c906108c | 17528 | |
b64f50a1 JK |
17529 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
17530 | INSERT); | |
51545339 DJ |
17531 | |
17532 | *slot = die; | |
c906108c SS |
17533 | } |
17534 | ||
b64f50a1 JK |
17535 | /* DW_ADDR is always stored already as sect_offset; despite for the forms |
17536 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
17537 | ||
93311388 DE |
17538 | static int |
17539 | is_ref_attr (struct attribute *attr) | |
c906108c | 17540 | { |
c906108c SS |
17541 | switch (attr->form) |
17542 | { | |
17543 | case DW_FORM_ref_addr: | |
c906108c SS |
17544 | case DW_FORM_ref1: |
17545 | case DW_FORM_ref2: | |
17546 | case DW_FORM_ref4: | |
613e1657 | 17547 | case DW_FORM_ref8: |
c906108c | 17548 | case DW_FORM_ref_udata: |
36586728 | 17549 | case DW_FORM_GNU_ref_alt: |
93311388 | 17550 | return 1; |
c906108c | 17551 | default: |
93311388 | 17552 | return 0; |
c906108c | 17553 | } |
93311388 DE |
17554 | } |
17555 | ||
b64f50a1 JK |
17556 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
17557 | required kind. */ | |
17558 | ||
17559 | static sect_offset | |
93311388 DE |
17560 | dwarf2_get_ref_die_offset (struct attribute *attr) |
17561 | { | |
4568ecf9 | 17562 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 17563 | |
93311388 | 17564 | if (is_ref_attr (attr)) |
b64f50a1 | 17565 | return retval; |
93311388 | 17566 | |
b64f50a1 | 17567 | retval.sect_off = 0; |
93311388 DE |
17568 | complaint (&symfile_complaints, |
17569 | _("unsupported die ref attribute form: '%s'"), | |
17570 | dwarf_form_name (attr->form)); | |
b64f50a1 | 17571 | return retval; |
c906108c SS |
17572 | } |
17573 | ||
43bbcdc2 PH |
17574 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
17575 | * the value held by the attribute is not constant. */ | |
a02abb62 | 17576 | |
43bbcdc2 | 17577 | static LONGEST |
a02abb62 JB |
17578 | dwarf2_get_attr_constant_value (struct attribute *attr, int default_value) |
17579 | { | |
17580 | if (attr->form == DW_FORM_sdata) | |
17581 | return DW_SND (attr); | |
17582 | else if (attr->form == DW_FORM_udata | |
17583 | || attr->form == DW_FORM_data1 | |
17584 | || attr->form == DW_FORM_data2 | |
17585 | || attr->form == DW_FORM_data4 | |
17586 | || attr->form == DW_FORM_data8) | |
17587 | return DW_UNSND (attr); | |
17588 | else | |
17589 | { | |
3e43a32a MS |
17590 | complaint (&symfile_complaints, |
17591 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
17592 | dwarf_form_name (attr->form)); |
17593 | return default_value; | |
17594 | } | |
17595 | } | |
17596 | ||
348e048f DE |
17597 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
17598 | On entry *REF_CU is the CU of SRC_DIE. | |
17599 | On exit *REF_CU is the CU of the result. */ | |
17600 | ||
17601 | static struct die_info * | |
17602 | follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr, | |
17603 | struct dwarf2_cu **ref_cu) | |
17604 | { | |
17605 | struct die_info *die; | |
17606 | ||
17607 | if (is_ref_attr (attr)) | |
17608 | die = follow_die_ref (src_die, attr, ref_cu); | |
55f1336d | 17609 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
17610 | die = follow_die_sig (src_die, attr, ref_cu); |
17611 | else | |
17612 | { | |
17613 | dump_die_for_error (src_die); | |
17614 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
17615 | (*ref_cu)->objfile->name); | |
17616 | } | |
17617 | ||
17618 | return die; | |
03dd20cc DJ |
17619 | } |
17620 | ||
5c631832 | 17621 | /* Follow reference OFFSET. |
673bfd45 DE |
17622 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
17623 | On exit *REF_CU is the CU of the result. | |
17624 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 17625 | |
f9aca02d | 17626 | static struct die_info * |
36586728 TT |
17627 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
17628 | struct dwarf2_cu **ref_cu) | |
c906108c | 17629 | { |
10b3939b | 17630 | struct die_info temp_die; |
f2f0e013 | 17631 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 17632 | |
348e048f DE |
17633 | gdb_assert (cu->per_cu != NULL); |
17634 | ||
98bfdba5 PA |
17635 | target_cu = cu; |
17636 | ||
3019eac3 | 17637 | if (cu->per_cu->is_debug_types) |
348e048f DE |
17638 | { |
17639 | /* .debug_types CUs cannot reference anything outside their CU. | |
17640 | If they need to, they have to reference a signatured type via | |
55f1336d | 17641 | DW_FORM_ref_sig8. */ |
348e048f | 17642 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 17643 | return NULL; |
348e048f | 17644 | } |
36586728 TT |
17645 | else if (offset_in_dwz != cu->per_cu->is_dwz |
17646 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
17647 | { |
17648 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 17649 | |
36586728 TT |
17650 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
17651 | cu->objfile); | |
03dd20cc DJ |
17652 | |
17653 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
17654 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
17655 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 17656 | |
10b3939b DJ |
17657 | target_cu = per_cu->cu; |
17658 | } | |
98bfdba5 PA |
17659 | else if (cu->dies == NULL) |
17660 | { | |
17661 | /* We're loading full DIEs during partial symbol reading. */ | |
17662 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 17663 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 17664 | } |
c906108c | 17665 | |
f2f0e013 | 17666 | *ref_cu = target_cu; |
51545339 | 17667 | temp_die.offset = offset; |
b64f50a1 | 17668 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 17669 | } |
10b3939b | 17670 | |
5c631832 JK |
17671 | /* Follow reference attribute ATTR of SRC_DIE. |
17672 | On entry *REF_CU is the CU of SRC_DIE. | |
17673 | On exit *REF_CU is the CU of the result. */ | |
17674 | ||
17675 | static struct die_info * | |
17676 | follow_die_ref (struct die_info *src_die, struct attribute *attr, | |
17677 | struct dwarf2_cu **ref_cu) | |
17678 | { | |
b64f50a1 | 17679 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
17680 | struct dwarf2_cu *cu = *ref_cu; |
17681 | struct die_info *die; | |
17682 | ||
36586728 TT |
17683 | die = follow_die_offset (offset, |
17684 | (attr->form == DW_FORM_GNU_ref_alt | |
17685 | || cu->per_cu->is_dwz), | |
17686 | ref_cu); | |
5c631832 JK |
17687 | if (!die) |
17688 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
17689 | "at 0x%x [in module %s]"), | |
b64f50a1 | 17690 | offset.sect_off, src_die->offset.sect_off, cu->objfile->name); |
348e048f | 17691 | |
5c631832 JK |
17692 | return die; |
17693 | } | |
17694 | ||
d83e736b JK |
17695 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
17696 | Returned value is intended for DW_OP_call*. Returned | |
17697 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
17698 | |
17699 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
17700 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
17701 | struct dwarf2_per_cu_data *per_cu, | |
17702 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17703 | void *baton) | |
5c631832 | 17704 | { |
918dd910 | 17705 | struct dwarf2_cu *cu; |
5c631832 JK |
17706 | struct die_info *die; |
17707 | struct attribute *attr; | |
17708 | struct dwarf2_locexpr_baton retval; | |
17709 | ||
8cf6f0b1 TT |
17710 | dw2_setup (per_cu->objfile); |
17711 | ||
918dd910 JK |
17712 | if (per_cu->cu == NULL) |
17713 | load_cu (per_cu); | |
17714 | cu = per_cu->cu; | |
17715 | ||
36586728 | 17716 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
17717 | if (!die) |
17718 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
b64f50a1 | 17719 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17720 | |
17721 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
17722 | if (!attr) | |
17723 | { | |
e103e986 JK |
17724 | /* DWARF: "If there is no such attribute, then there is no effect.". |
17725 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 17726 | |
e103e986 | 17727 | retval.data = NULL; |
5c631832 JK |
17728 | retval.size = 0; |
17729 | } | |
8cf6f0b1 TT |
17730 | else if (attr_form_is_section_offset (attr)) |
17731 | { | |
17732 | struct dwarf2_loclist_baton loclist_baton; | |
17733 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
17734 | size_t size; | |
17735 | ||
17736 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
17737 | ||
17738 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
17739 | &size, pc); | |
17740 | retval.size = size; | |
17741 | } | |
5c631832 JK |
17742 | else |
17743 | { | |
17744 | if (!attr_form_is_block (attr)) | |
17745 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
17746 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
b64f50a1 | 17747 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17748 | |
17749 | retval.data = DW_BLOCK (attr)->data; | |
17750 | retval.size = DW_BLOCK (attr)->size; | |
17751 | } | |
17752 | retval.per_cu = cu->per_cu; | |
918dd910 | 17753 | |
918dd910 JK |
17754 | age_cached_comp_units (); |
17755 | ||
5c631832 | 17756 | return retval; |
348e048f DE |
17757 | } |
17758 | ||
8b9737bf TT |
17759 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
17760 | offset. */ | |
17761 | ||
17762 | struct dwarf2_locexpr_baton | |
17763 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
17764 | struct dwarf2_per_cu_data *per_cu, | |
17765 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17766 | void *baton) | |
17767 | { | |
17768 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
17769 | ||
17770 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
17771 | } | |
17772 | ||
8a9b8146 TT |
17773 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
17774 | PER_CU. */ | |
17775 | ||
17776 | struct type * | |
b64f50a1 | 17777 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
17778 | struct dwarf2_per_cu_data *per_cu) |
17779 | { | |
b64f50a1 JK |
17780 | sect_offset die_offset_sect; |
17781 | ||
8a9b8146 | 17782 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
17783 | |
17784 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
17785 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
17786 | } |
17787 | ||
ac9ec31b | 17788 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 17789 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
17790 | On exit *REF_CU is the CU of the result. |
17791 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
17792 | |
17793 | static struct die_info * | |
ac9ec31b DE |
17794 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
17795 | struct dwarf2_cu **ref_cu) | |
348e048f DE |
17796 | { |
17797 | struct objfile *objfile = (*ref_cu)->objfile; | |
17798 | struct die_info temp_die; | |
348e048f DE |
17799 | struct dwarf2_cu *sig_cu; |
17800 | struct die_info *die; | |
17801 | ||
ac9ec31b DE |
17802 | /* While it might be nice to assert sig_type->type == NULL here, |
17803 | we can get here for DW_AT_imported_declaration where we need | |
17804 | the DIE not the type. */ | |
348e048f DE |
17805 | |
17806 | /* If necessary, add it to the queue and load its DIEs. */ | |
17807 | ||
95554aad | 17808 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 17809 | read_signatured_type (sig_type); |
348e048f DE |
17810 | |
17811 | gdb_assert (sig_type->per_cu.cu != NULL); | |
17812 | ||
17813 | sig_cu = sig_type->per_cu.cu; | |
3019eac3 DE |
17814 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
17815 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
17816 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
17817 | temp_die.offset.sect_off); | |
348e048f DE |
17818 | if (die) |
17819 | { | |
796a7ff8 DE |
17820 | /* For .gdb_index version 7 keep track of included TUs. |
17821 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
17822 | if (dwarf2_per_objfile->index_table != NULL | |
17823 | && dwarf2_per_objfile->index_table->version <= 7) | |
17824 | { | |
17825 | VEC_safe_push (dwarf2_per_cu_ptr, | |
17826 | (*ref_cu)->per_cu->imported_symtabs, | |
17827 | sig_cu->per_cu); | |
17828 | } | |
17829 | ||
348e048f DE |
17830 | *ref_cu = sig_cu; |
17831 | return die; | |
17832 | } | |
17833 | ||
ac9ec31b DE |
17834 | return NULL; |
17835 | } | |
17836 | ||
17837 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
17838 | On entry *REF_CU is the CU of SRC_DIE. | |
17839 | On exit *REF_CU is the CU of the result. | |
17840 | The result is the DIE of the type. | |
17841 | If the referenced type cannot be found an error is thrown. */ | |
17842 | ||
17843 | static struct die_info * | |
17844 | follow_die_sig (struct die_info *src_die, struct attribute *attr, | |
17845 | struct dwarf2_cu **ref_cu) | |
17846 | { | |
17847 | ULONGEST signature = DW_SIGNATURE (attr); | |
17848 | struct signatured_type *sig_type; | |
17849 | struct die_info *die; | |
17850 | ||
17851 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
17852 | ||
17853 | sig_type = lookup_signatured_type (signature); | |
17854 | /* sig_type will be NULL if the signatured type is missing from | |
17855 | the debug info. */ | |
17856 | if (sig_type == NULL) | |
17857 | { | |
17858 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
17859 | " from DIE at 0x%x [in module %s]"), | |
17860 | hex_string (signature), src_die->offset.sect_off, | |
17861 | (*ref_cu)->objfile->name); | |
17862 | } | |
17863 | ||
17864 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
17865 | if (die == NULL) | |
17866 | { | |
17867 | dump_die_for_error (src_die); | |
17868 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
17869 | " from DIE at 0x%x [in module %s]"), | |
17870 | hex_string (signature), src_die->offset.sect_off, | |
17871 | (*ref_cu)->objfile->name); | |
17872 | } | |
17873 | ||
17874 | return die; | |
17875 | } | |
17876 | ||
17877 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
17878 | reading in and processing the type unit if necessary. */ | |
17879 | ||
17880 | static struct type * | |
17881 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
17882 | struct dwarf2_cu *cu) | |
17883 | { | |
17884 | struct signatured_type *sig_type; | |
17885 | struct dwarf2_cu *type_cu; | |
17886 | struct die_info *type_die; | |
17887 | struct type *type; | |
17888 | ||
17889 | sig_type = lookup_signatured_type (signature); | |
17890 | /* sig_type will be NULL if the signatured type is missing from | |
17891 | the debug info. */ | |
17892 | if (sig_type == NULL) | |
17893 | { | |
17894 | complaint (&symfile_complaints, | |
17895 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
17896 | " from DIE at 0x%x [in module %s]"), | |
17897 | hex_string (signature), die->offset.sect_off, | |
17898 | dwarf2_per_objfile->objfile->name); | |
17899 | return build_error_marker_type (cu, die); | |
17900 | } | |
17901 | ||
17902 | /* If we already know the type we're done. */ | |
17903 | if (sig_type->type != NULL) | |
17904 | return sig_type->type; | |
17905 | ||
17906 | type_cu = cu; | |
17907 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
17908 | if (type_die != NULL) | |
17909 | { | |
17910 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
17911 | is created. This is important, for example, because for c++ classes | |
17912 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
17913 | type = read_type_die (type_die, type_cu); | |
17914 | if (type == NULL) | |
17915 | { | |
17916 | complaint (&symfile_complaints, | |
17917 | _("Dwarf Error: Cannot build signatured type %s" | |
17918 | " referenced from DIE at 0x%x [in module %s]"), | |
17919 | hex_string (signature), die->offset.sect_off, | |
17920 | dwarf2_per_objfile->objfile->name); | |
17921 | type = build_error_marker_type (cu, die); | |
17922 | } | |
17923 | } | |
17924 | else | |
17925 | { | |
17926 | complaint (&symfile_complaints, | |
17927 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
17928 | " from DIE at 0x%x [in module %s]"), | |
17929 | hex_string (signature), die->offset.sect_off, | |
17930 | dwarf2_per_objfile->objfile->name); | |
17931 | type = build_error_marker_type (cu, die); | |
17932 | } | |
17933 | sig_type->type = type; | |
17934 | ||
17935 | return type; | |
17936 | } | |
17937 | ||
17938 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
17939 | reading in and processing the type unit if necessary. */ | |
17940 | ||
17941 | static struct type * | |
b385a60d PM |
17942 | get_DW_AT_signature_type (struct die_info *die, struct attribute *attr, |
17943 | struct dwarf2_cu *cu) /* ARI: editCase function */ | |
ac9ec31b DE |
17944 | { |
17945 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
17946 | if (is_ref_attr (attr)) | |
17947 | { | |
17948 | struct dwarf2_cu *type_cu = cu; | |
17949 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
17950 | ||
17951 | return read_type_die (type_die, type_cu); | |
17952 | } | |
17953 | else if (attr->form == DW_FORM_ref_sig8) | |
17954 | { | |
17955 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
17956 | } | |
17957 | else | |
17958 | { | |
17959 | complaint (&symfile_complaints, | |
17960 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
17961 | " at 0x%x [in module %s]"), | |
17962 | dwarf_form_name (attr->form), die->offset.sect_off, | |
17963 | dwarf2_per_objfile->objfile->name); | |
17964 | return build_error_marker_type (cu, die); | |
17965 | } | |
348e048f DE |
17966 | } |
17967 | ||
e5fe5e75 | 17968 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
17969 | |
17970 | static void | |
e5fe5e75 | 17971 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 17972 | { |
52dc124a | 17973 | struct signatured_type *sig_type; |
348e048f | 17974 | |
f4dc4d17 DE |
17975 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
17976 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
17977 | ||
6721b2ec DE |
17978 | /* We have the per_cu, but we need the signatured_type. |
17979 | Fortunately this is an easy translation. */ | |
17980 | gdb_assert (per_cu->is_debug_types); | |
17981 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 17982 | |
6721b2ec | 17983 | gdb_assert (per_cu->cu == NULL); |
348e048f | 17984 | |
52dc124a | 17985 | read_signatured_type (sig_type); |
348e048f | 17986 | |
6721b2ec | 17987 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
17988 | } |
17989 | ||
dee91e82 DE |
17990 | /* die_reader_func for read_signatured_type. |
17991 | This is identical to load_full_comp_unit_reader, | |
17992 | but is kept separate for now. */ | |
348e048f DE |
17993 | |
17994 | static void | |
dee91e82 | 17995 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 17996 | const gdb_byte *info_ptr, |
dee91e82 DE |
17997 | struct die_info *comp_unit_die, |
17998 | int has_children, | |
17999 | void *data) | |
348e048f | 18000 | { |
dee91e82 | 18001 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 18002 | |
dee91e82 DE |
18003 | gdb_assert (cu->die_hash == NULL); |
18004 | cu->die_hash = | |
18005 | htab_create_alloc_ex (cu->header.length / 12, | |
18006 | die_hash, | |
18007 | die_eq, | |
18008 | NULL, | |
18009 | &cu->comp_unit_obstack, | |
18010 | hashtab_obstack_allocate, | |
18011 | dummy_obstack_deallocate); | |
348e048f | 18012 | |
dee91e82 DE |
18013 | if (has_children) |
18014 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
18015 | &info_ptr, comp_unit_die); | |
18016 | cu->dies = comp_unit_die; | |
18017 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
18018 | |
18019 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 18020 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 18021 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
18022 | or we won't be able to build types correctly. |
18023 | Similarly, if we do not read the producer, we can not apply | |
18024 | producer-specific interpretation. */ | |
95554aad | 18025 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 18026 | } |
348e048f | 18027 | |
3019eac3 DE |
18028 | /* Read in a signatured type and build its CU and DIEs. |
18029 | If the type is a stub for the real type in a DWO file, | |
18030 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
18031 | |
18032 | static void | |
18033 | read_signatured_type (struct signatured_type *sig_type) | |
18034 | { | |
18035 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 18036 | |
3019eac3 | 18037 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 18038 | gdb_assert (per_cu->cu == NULL); |
348e048f | 18039 | |
f4dc4d17 DE |
18040 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
18041 | read_signatured_type_reader, NULL); | |
c906108c SS |
18042 | } |
18043 | ||
c906108c SS |
18044 | /* Decode simple location descriptions. |
18045 | Given a pointer to a dwarf block that defines a location, compute | |
18046 | the location and return the value. | |
18047 | ||
4cecd739 DJ |
18048 | NOTE drow/2003-11-18: This function is called in two situations |
18049 | now: for the address of static or global variables (partial symbols | |
18050 | only) and for offsets into structures which are expected to be | |
18051 | (more or less) constant. The partial symbol case should go away, | |
18052 | and only the constant case should remain. That will let this | |
18053 | function complain more accurately. A few special modes are allowed | |
18054 | without complaint for global variables (for instance, global | |
18055 | register values and thread-local values). | |
c906108c SS |
18056 | |
18057 | A location description containing no operations indicates that the | |
4cecd739 | 18058 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
18059 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
18060 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
18061 | complaint. |
18062 | ||
18063 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
18064 | |
18065 | static CORE_ADDR | |
e7c27a73 | 18066 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 18067 | { |
e7c27a73 | 18068 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
18069 | size_t i; |
18070 | size_t size = blk->size; | |
d521ce57 | 18071 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
18072 | CORE_ADDR stack[64]; |
18073 | int stacki; | |
18074 | unsigned int bytes_read, unsnd; | |
18075 | gdb_byte op; | |
c906108c | 18076 | |
21ae7a4d JK |
18077 | i = 0; |
18078 | stacki = 0; | |
18079 | stack[stacki] = 0; | |
18080 | stack[++stacki] = 0; | |
18081 | ||
18082 | while (i < size) | |
18083 | { | |
18084 | op = data[i++]; | |
18085 | switch (op) | |
18086 | { | |
18087 | case DW_OP_lit0: | |
18088 | case DW_OP_lit1: | |
18089 | case DW_OP_lit2: | |
18090 | case DW_OP_lit3: | |
18091 | case DW_OP_lit4: | |
18092 | case DW_OP_lit5: | |
18093 | case DW_OP_lit6: | |
18094 | case DW_OP_lit7: | |
18095 | case DW_OP_lit8: | |
18096 | case DW_OP_lit9: | |
18097 | case DW_OP_lit10: | |
18098 | case DW_OP_lit11: | |
18099 | case DW_OP_lit12: | |
18100 | case DW_OP_lit13: | |
18101 | case DW_OP_lit14: | |
18102 | case DW_OP_lit15: | |
18103 | case DW_OP_lit16: | |
18104 | case DW_OP_lit17: | |
18105 | case DW_OP_lit18: | |
18106 | case DW_OP_lit19: | |
18107 | case DW_OP_lit20: | |
18108 | case DW_OP_lit21: | |
18109 | case DW_OP_lit22: | |
18110 | case DW_OP_lit23: | |
18111 | case DW_OP_lit24: | |
18112 | case DW_OP_lit25: | |
18113 | case DW_OP_lit26: | |
18114 | case DW_OP_lit27: | |
18115 | case DW_OP_lit28: | |
18116 | case DW_OP_lit29: | |
18117 | case DW_OP_lit30: | |
18118 | case DW_OP_lit31: | |
18119 | stack[++stacki] = op - DW_OP_lit0; | |
18120 | break; | |
f1bea926 | 18121 | |
21ae7a4d JK |
18122 | case DW_OP_reg0: |
18123 | case DW_OP_reg1: | |
18124 | case DW_OP_reg2: | |
18125 | case DW_OP_reg3: | |
18126 | case DW_OP_reg4: | |
18127 | case DW_OP_reg5: | |
18128 | case DW_OP_reg6: | |
18129 | case DW_OP_reg7: | |
18130 | case DW_OP_reg8: | |
18131 | case DW_OP_reg9: | |
18132 | case DW_OP_reg10: | |
18133 | case DW_OP_reg11: | |
18134 | case DW_OP_reg12: | |
18135 | case DW_OP_reg13: | |
18136 | case DW_OP_reg14: | |
18137 | case DW_OP_reg15: | |
18138 | case DW_OP_reg16: | |
18139 | case DW_OP_reg17: | |
18140 | case DW_OP_reg18: | |
18141 | case DW_OP_reg19: | |
18142 | case DW_OP_reg20: | |
18143 | case DW_OP_reg21: | |
18144 | case DW_OP_reg22: | |
18145 | case DW_OP_reg23: | |
18146 | case DW_OP_reg24: | |
18147 | case DW_OP_reg25: | |
18148 | case DW_OP_reg26: | |
18149 | case DW_OP_reg27: | |
18150 | case DW_OP_reg28: | |
18151 | case DW_OP_reg29: | |
18152 | case DW_OP_reg30: | |
18153 | case DW_OP_reg31: | |
18154 | stack[++stacki] = op - DW_OP_reg0; | |
18155 | if (i < size) | |
18156 | dwarf2_complex_location_expr_complaint (); | |
18157 | break; | |
c906108c | 18158 | |
21ae7a4d JK |
18159 | case DW_OP_regx: |
18160 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
18161 | i += bytes_read; | |
18162 | stack[++stacki] = unsnd; | |
18163 | if (i < size) | |
18164 | dwarf2_complex_location_expr_complaint (); | |
18165 | break; | |
c906108c | 18166 | |
21ae7a4d JK |
18167 | case DW_OP_addr: |
18168 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
18169 | cu, &bytes_read); | |
18170 | i += bytes_read; | |
18171 | break; | |
d53d4ac5 | 18172 | |
21ae7a4d JK |
18173 | case DW_OP_const1u: |
18174 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
18175 | i += 1; | |
18176 | break; | |
18177 | ||
18178 | case DW_OP_const1s: | |
18179 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
18180 | i += 1; | |
18181 | break; | |
18182 | ||
18183 | case DW_OP_const2u: | |
18184 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
18185 | i += 2; | |
18186 | break; | |
18187 | ||
18188 | case DW_OP_const2s: | |
18189 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
18190 | i += 2; | |
18191 | break; | |
d53d4ac5 | 18192 | |
21ae7a4d JK |
18193 | case DW_OP_const4u: |
18194 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
18195 | i += 4; | |
18196 | break; | |
18197 | ||
18198 | case DW_OP_const4s: | |
18199 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
18200 | i += 4; | |
18201 | break; | |
18202 | ||
585861ea JK |
18203 | case DW_OP_const8u: |
18204 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
18205 | i += 8; | |
18206 | break; | |
18207 | ||
21ae7a4d JK |
18208 | case DW_OP_constu: |
18209 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
18210 | &bytes_read); | |
18211 | i += bytes_read; | |
18212 | break; | |
18213 | ||
18214 | case DW_OP_consts: | |
18215 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
18216 | i += bytes_read; | |
18217 | break; | |
18218 | ||
18219 | case DW_OP_dup: | |
18220 | stack[stacki + 1] = stack[stacki]; | |
18221 | stacki++; | |
18222 | break; | |
18223 | ||
18224 | case DW_OP_plus: | |
18225 | stack[stacki - 1] += stack[stacki]; | |
18226 | stacki--; | |
18227 | break; | |
18228 | ||
18229 | case DW_OP_plus_uconst: | |
18230 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
18231 | &bytes_read); | |
18232 | i += bytes_read; | |
18233 | break; | |
18234 | ||
18235 | case DW_OP_minus: | |
18236 | stack[stacki - 1] -= stack[stacki]; | |
18237 | stacki--; | |
18238 | break; | |
18239 | ||
18240 | case DW_OP_deref: | |
18241 | /* If we're not the last op, then we definitely can't encode | |
18242 | this using GDB's address_class enum. This is valid for partial | |
18243 | global symbols, although the variable's address will be bogus | |
18244 | in the psymtab. */ | |
18245 | if (i < size) | |
18246 | dwarf2_complex_location_expr_complaint (); | |
18247 | break; | |
18248 | ||
18249 | case DW_OP_GNU_push_tls_address: | |
18250 | /* The top of the stack has the offset from the beginning | |
18251 | of the thread control block at which the variable is located. */ | |
18252 | /* Nothing should follow this operator, so the top of stack would | |
18253 | be returned. */ | |
18254 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
18255 | address will be bogus in the psymtab. Make it always at least |
18256 | non-zero to not look as a variable garbage collected by linker | |
18257 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
18258 | if (i < size) |
18259 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 18260 | stack[stacki]++; |
21ae7a4d JK |
18261 | break; |
18262 | ||
18263 | case DW_OP_GNU_uninit: | |
18264 | break; | |
18265 | ||
3019eac3 | 18266 | case DW_OP_GNU_addr_index: |
49f6c839 | 18267 | case DW_OP_GNU_const_index: |
3019eac3 DE |
18268 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
18269 | &bytes_read); | |
18270 | i += bytes_read; | |
18271 | break; | |
18272 | ||
21ae7a4d JK |
18273 | default: |
18274 | { | |
f39c6ffd | 18275 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
18276 | |
18277 | if (name) | |
18278 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
18279 | name); | |
18280 | else | |
18281 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
18282 | op); | |
18283 | } | |
18284 | ||
18285 | return (stack[stacki]); | |
d53d4ac5 | 18286 | } |
3c6e0cb3 | 18287 | |
21ae7a4d JK |
18288 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
18289 | outside of the allocated space. Also enforce minimum>0. */ | |
18290 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
18291 | { | |
18292 | complaint (&symfile_complaints, | |
18293 | _("location description stack overflow")); | |
18294 | return 0; | |
18295 | } | |
18296 | ||
18297 | if (stacki <= 0) | |
18298 | { | |
18299 | complaint (&symfile_complaints, | |
18300 | _("location description stack underflow")); | |
18301 | return 0; | |
18302 | } | |
18303 | } | |
18304 | return (stack[stacki]); | |
c906108c SS |
18305 | } |
18306 | ||
18307 | /* memory allocation interface */ | |
18308 | ||
c906108c | 18309 | static struct dwarf_block * |
7b5a2f43 | 18310 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
18311 | { |
18312 | struct dwarf_block *blk; | |
18313 | ||
18314 | blk = (struct dwarf_block *) | |
7b5a2f43 | 18315 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
18316 | return (blk); |
18317 | } | |
18318 | ||
c906108c | 18319 | static struct die_info * |
b60c80d6 | 18320 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
18321 | { |
18322 | struct die_info *die; | |
b60c80d6 DJ |
18323 | size_t size = sizeof (struct die_info); |
18324 | ||
18325 | if (num_attrs > 1) | |
18326 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 18327 | |
b60c80d6 | 18328 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
18329 | memset (die, 0, sizeof (struct die_info)); |
18330 | return (die); | |
18331 | } | |
2e276125 JB |
18332 | |
18333 | \f | |
18334 | /* Macro support. */ | |
18335 | ||
233d95b5 JK |
18336 | /* Return file name relative to the compilation directory of file number I in |
18337 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 18338 | responsible for freeing it. */ |
233d95b5 | 18339 | |
2e276125 | 18340 | static char * |
233d95b5 | 18341 | file_file_name (int file, struct line_header *lh) |
2e276125 | 18342 | { |
6a83a1e6 EZ |
18343 | /* Is the file number a valid index into the line header's file name |
18344 | table? Remember that file numbers start with one, not zero. */ | |
18345 | if (1 <= file && file <= lh->num_file_names) | |
18346 | { | |
18347 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 18348 | |
233d95b5 | 18349 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0) |
6a83a1e6 | 18350 | return xstrdup (fe->name); |
233d95b5 JK |
18351 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
18352 | fe->name, NULL); | |
6a83a1e6 | 18353 | } |
2e276125 JB |
18354 | else |
18355 | { | |
6a83a1e6 EZ |
18356 | /* The compiler produced a bogus file number. We can at least |
18357 | record the macro definitions made in the file, even if we | |
18358 | won't be able to find the file by name. */ | |
18359 | char fake_name[80]; | |
9a619af0 | 18360 | |
8c042590 PM |
18361 | xsnprintf (fake_name, sizeof (fake_name), |
18362 | "<bad macro file number %d>", file); | |
2e276125 | 18363 | |
6e70227d | 18364 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
18365 | _("bad file number in macro information (%d)"), |
18366 | file); | |
2e276125 | 18367 | |
6a83a1e6 | 18368 | return xstrdup (fake_name); |
2e276125 JB |
18369 | } |
18370 | } | |
18371 | ||
233d95b5 JK |
18372 | /* Return the full name of file number I in *LH's file name table. |
18373 | Use COMP_DIR as the name of the current directory of the | |
18374 | compilation. The result is allocated using xmalloc; the caller is | |
18375 | responsible for freeing it. */ | |
18376 | static char * | |
18377 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
18378 | { | |
18379 | /* Is the file number a valid index into the line header's file name | |
18380 | table? Remember that file numbers start with one, not zero. */ | |
18381 | if (1 <= file && file <= lh->num_file_names) | |
18382 | { | |
18383 | char *relative = file_file_name (file, lh); | |
18384 | ||
18385 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
18386 | return relative; | |
18387 | return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL); | |
18388 | } | |
18389 | else | |
18390 | return file_file_name (file, lh); | |
18391 | } | |
18392 | ||
2e276125 JB |
18393 | |
18394 | static struct macro_source_file * | |
18395 | macro_start_file (int file, int line, | |
18396 | struct macro_source_file *current_file, | |
18397 | const char *comp_dir, | |
18398 | struct line_header *lh, struct objfile *objfile) | |
18399 | { | |
233d95b5 JK |
18400 | /* File name relative to the compilation directory of this source file. */ |
18401 | char *file_name = file_file_name (file, lh); | |
2e276125 JB |
18402 | |
18403 | /* We don't create a macro table for this compilation unit | |
18404 | at all until we actually get a filename. */ | |
18405 | if (! pending_macros) | |
6532ff36 | 18406 | pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack, |
233d95b5 JK |
18407 | objfile->per_bfd->macro_cache, |
18408 | comp_dir); | |
2e276125 JB |
18409 | |
18410 | if (! current_file) | |
abc9d0dc TT |
18411 | { |
18412 | /* If we have no current file, then this must be the start_file | |
18413 | directive for the compilation unit's main source file. */ | |
233d95b5 | 18414 | current_file = macro_set_main (pending_macros, file_name); |
abc9d0dc TT |
18415 | macro_define_special (pending_macros); |
18416 | } | |
2e276125 | 18417 | else |
233d95b5 | 18418 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 18419 | |
233d95b5 | 18420 | xfree (file_name); |
6e70227d | 18421 | |
2e276125 JB |
18422 | return current_file; |
18423 | } | |
18424 | ||
18425 | ||
18426 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
18427 | followed by a null byte. */ | |
18428 | static char * | |
18429 | copy_string (const char *buf, int len) | |
18430 | { | |
18431 | char *s = xmalloc (len + 1); | |
9a619af0 | 18432 | |
2e276125 JB |
18433 | memcpy (s, buf, len); |
18434 | s[len] = '\0'; | |
2e276125 JB |
18435 | return s; |
18436 | } | |
18437 | ||
18438 | ||
18439 | static const char * | |
18440 | consume_improper_spaces (const char *p, const char *body) | |
18441 | { | |
18442 | if (*p == ' ') | |
18443 | { | |
4d3c2250 | 18444 | complaint (&symfile_complaints, |
3e43a32a MS |
18445 | _("macro definition contains spaces " |
18446 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 18447 | body); |
2e276125 JB |
18448 | |
18449 | while (*p == ' ') | |
18450 | p++; | |
18451 | } | |
18452 | ||
18453 | return p; | |
18454 | } | |
18455 | ||
18456 | ||
18457 | static void | |
18458 | parse_macro_definition (struct macro_source_file *file, int line, | |
18459 | const char *body) | |
18460 | { | |
18461 | const char *p; | |
18462 | ||
18463 | /* The body string takes one of two forms. For object-like macro | |
18464 | definitions, it should be: | |
18465 | ||
18466 | <macro name> " " <definition> | |
18467 | ||
18468 | For function-like macro definitions, it should be: | |
18469 | ||
18470 | <macro name> "() " <definition> | |
18471 | or | |
18472 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
18473 | ||
18474 | Spaces may appear only where explicitly indicated, and in the | |
18475 | <definition>. | |
18476 | ||
18477 | The Dwarf 2 spec says that an object-like macro's name is always | |
18478 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 18479 | the space when the macro's definition is the empty string. |
2e276125 JB |
18480 | |
18481 | The Dwarf 2 spec says that there should be no spaces between the | |
18482 | formal arguments in a function-like macro's formal argument list, | |
18483 | but versions of GCC around March 2002 include spaces after the | |
18484 | commas. */ | |
18485 | ||
18486 | ||
18487 | /* Find the extent of the macro name. The macro name is terminated | |
18488 | by either a space or null character (for an object-like macro) or | |
18489 | an opening paren (for a function-like macro). */ | |
18490 | for (p = body; *p; p++) | |
18491 | if (*p == ' ' || *p == '(') | |
18492 | break; | |
18493 | ||
18494 | if (*p == ' ' || *p == '\0') | |
18495 | { | |
18496 | /* It's an object-like macro. */ | |
18497 | int name_len = p - body; | |
18498 | char *name = copy_string (body, name_len); | |
18499 | const char *replacement; | |
18500 | ||
18501 | if (*p == ' ') | |
18502 | replacement = body + name_len + 1; | |
18503 | else | |
18504 | { | |
4d3c2250 | 18505 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18506 | replacement = body + name_len; |
18507 | } | |
6e70227d | 18508 | |
2e276125 JB |
18509 | macro_define_object (file, line, name, replacement); |
18510 | ||
18511 | xfree (name); | |
18512 | } | |
18513 | else if (*p == '(') | |
18514 | { | |
18515 | /* It's a function-like macro. */ | |
18516 | char *name = copy_string (body, p - body); | |
18517 | int argc = 0; | |
18518 | int argv_size = 1; | |
18519 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
18520 | ||
18521 | p++; | |
18522 | ||
18523 | p = consume_improper_spaces (p, body); | |
18524 | ||
18525 | /* Parse the formal argument list. */ | |
18526 | while (*p && *p != ')') | |
18527 | { | |
18528 | /* Find the extent of the current argument name. */ | |
18529 | const char *arg_start = p; | |
18530 | ||
18531 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
18532 | p++; | |
18533 | ||
18534 | if (! *p || p == arg_start) | |
4d3c2250 | 18535 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18536 | else |
18537 | { | |
18538 | /* Make sure argv has room for the new argument. */ | |
18539 | if (argc >= argv_size) | |
18540 | { | |
18541 | argv_size *= 2; | |
18542 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
18543 | } | |
18544 | ||
18545 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
18546 | } | |
18547 | ||
18548 | p = consume_improper_spaces (p, body); | |
18549 | ||
18550 | /* Consume the comma, if present. */ | |
18551 | if (*p == ',') | |
18552 | { | |
18553 | p++; | |
18554 | ||
18555 | p = consume_improper_spaces (p, body); | |
18556 | } | |
18557 | } | |
18558 | ||
18559 | if (*p == ')') | |
18560 | { | |
18561 | p++; | |
18562 | ||
18563 | if (*p == ' ') | |
18564 | /* Perfectly formed definition, no complaints. */ | |
18565 | macro_define_function (file, line, name, | |
6e70227d | 18566 | argc, (const char **) argv, |
2e276125 JB |
18567 | p + 1); |
18568 | else if (*p == '\0') | |
18569 | { | |
18570 | /* Complain, but do define it. */ | |
4d3c2250 | 18571 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 18572 | macro_define_function (file, line, name, |
6e70227d | 18573 | argc, (const char **) argv, |
2e276125 JB |
18574 | p); |
18575 | } | |
18576 | else | |
18577 | /* Just complain. */ | |
4d3c2250 | 18578 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18579 | } |
18580 | else | |
18581 | /* Just complain. */ | |
4d3c2250 | 18582 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18583 | |
18584 | xfree (name); | |
18585 | { | |
18586 | int i; | |
18587 | ||
18588 | for (i = 0; i < argc; i++) | |
18589 | xfree (argv[i]); | |
18590 | } | |
18591 | xfree (argv); | |
18592 | } | |
18593 | else | |
4d3c2250 | 18594 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18595 | } |
18596 | ||
cf2c3c16 TT |
18597 | /* Skip some bytes from BYTES according to the form given in FORM. |
18598 | Returns the new pointer. */ | |
2e276125 | 18599 | |
d521ce57 TT |
18600 | static const gdb_byte * |
18601 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
18602 | enum dwarf_form form, |
18603 | unsigned int offset_size, | |
18604 | struct dwarf2_section_info *section) | |
2e276125 | 18605 | { |
cf2c3c16 | 18606 | unsigned int bytes_read; |
2e276125 | 18607 | |
cf2c3c16 | 18608 | switch (form) |
2e276125 | 18609 | { |
cf2c3c16 TT |
18610 | case DW_FORM_data1: |
18611 | case DW_FORM_flag: | |
18612 | ++bytes; | |
18613 | break; | |
18614 | ||
18615 | case DW_FORM_data2: | |
18616 | bytes += 2; | |
18617 | break; | |
18618 | ||
18619 | case DW_FORM_data4: | |
18620 | bytes += 4; | |
18621 | break; | |
18622 | ||
18623 | case DW_FORM_data8: | |
18624 | bytes += 8; | |
18625 | break; | |
18626 | ||
18627 | case DW_FORM_string: | |
18628 | read_direct_string (abfd, bytes, &bytes_read); | |
18629 | bytes += bytes_read; | |
18630 | break; | |
18631 | ||
18632 | case DW_FORM_sec_offset: | |
18633 | case DW_FORM_strp: | |
36586728 | 18634 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
18635 | bytes += offset_size; |
18636 | break; | |
18637 | ||
18638 | case DW_FORM_block: | |
18639 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
18640 | bytes += bytes_read; | |
18641 | break; | |
18642 | ||
18643 | case DW_FORM_block1: | |
18644 | bytes += 1 + read_1_byte (abfd, bytes); | |
18645 | break; | |
18646 | case DW_FORM_block2: | |
18647 | bytes += 2 + read_2_bytes (abfd, bytes); | |
18648 | break; | |
18649 | case DW_FORM_block4: | |
18650 | bytes += 4 + read_4_bytes (abfd, bytes); | |
18651 | break; | |
18652 | ||
18653 | case DW_FORM_sdata: | |
18654 | case DW_FORM_udata: | |
3019eac3 DE |
18655 | case DW_FORM_GNU_addr_index: |
18656 | case DW_FORM_GNU_str_index: | |
d521ce57 | 18657 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
18658 | if (bytes == NULL) |
18659 | { | |
18660 | dwarf2_section_buffer_overflow_complaint (section); | |
18661 | return NULL; | |
18662 | } | |
cf2c3c16 TT |
18663 | break; |
18664 | ||
18665 | default: | |
18666 | { | |
18667 | complain: | |
18668 | complaint (&symfile_complaints, | |
18669 | _("invalid form 0x%x in `%s'"), | |
18670 | form, | |
18671 | section->asection->name); | |
18672 | return NULL; | |
18673 | } | |
2e276125 JB |
18674 | } |
18675 | ||
cf2c3c16 TT |
18676 | return bytes; |
18677 | } | |
757a13d0 | 18678 | |
cf2c3c16 TT |
18679 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
18680 | opcode. Returns an updated pointer to the macro data buffer; or, | |
18681 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 18682 | |
d521ce57 | 18683 | static const gdb_byte * |
cf2c3c16 | 18684 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
18685 | const gdb_byte **opcode_definitions, |
18686 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
18687 | bfd *abfd, |
18688 | unsigned int offset_size, | |
18689 | struct dwarf2_section_info *section) | |
18690 | { | |
18691 | unsigned int bytes_read, i; | |
18692 | unsigned long arg; | |
d521ce57 | 18693 | const gdb_byte *defn; |
2e276125 | 18694 | |
cf2c3c16 | 18695 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 18696 | { |
cf2c3c16 TT |
18697 | complaint (&symfile_complaints, |
18698 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
18699 | opcode); | |
18700 | return NULL; | |
18701 | } | |
2e276125 | 18702 | |
cf2c3c16 TT |
18703 | defn = opcode_definitions[opcode]; |
18704 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
18705 | defn += bytes_read; | |
2e276125 | 18706 | |
cf2c3c16 TT |
18707 | for (i = 0; i < arg; ++i) |
18708 | { | |
f664829e DE |
18709 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
18710 | section); | |
cf2c3c16 TT |
18711 | if (mac_ptr == NULL) |
18712 | { | |
18713 | /* skip_form_bytes already issued the complaint. */ | |
18714 | return NULL; | |
18715 | } | |
18716 | } | |
757a13d0 | 18717 | |
cf2c3c16 TT |
18718 | return mac_ptr; |
18719 | } | |
757a13d0 | 18720 | |
cf2c3c16 TT |
18721 | /* A helper function which parses the header of a macro section. |
18722 | If the macro section is the extended (for now called "GNU") type, | |
18723 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
18724 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 18725 | |
d521ce57 TT |
18726 | static const gdb_byte * |
18727 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 18728 | bfd *abfd, |
d521ce57 | 18729 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
18730 | unsigned int *offset_size, |
18731 | int section_is_gnu) | |
18732 | { | |
18733 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 18734 | |
cf2c3c16 TT |
18735 | if (section_is_gnu) |
18736 | { | |
18737 | unsigned int version, flags; | |
757a13d0 | 18738 | |
cf2c3c16 TT |
18739 | version = read_2_bytes (abfd, mac_ptr); |
18740 | if (version != 4) | |
18741 | { | |
18742 | complaint (&symfile_complaints, | |
18743 | _("unrecognized version `%d' in .debug_macro section"), | |
18744 | version); | |
18745 | return NULL; | |
18746 | } | |
18747 | mac_ptr += 2; | |
757a13d0 | 18748 | |
cf2c3c16 TT |
18749 | flags = read_1_byte (abfd, mac_ptr); |
18750 | ++mac_ptr; | |
18751 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 18752 | |
cf2c3c16 TT |
18753 | if ((flags & 2) != 0) |
18754 | /* We don't need the line table offset. */ | |
18755 | mac_ptr += *offset_size; | |
757a13d0 | 18756 | |
cf2c3c16 TT |
18757 | /* Vendor opcode descriptions. */ |
18758 | if ((flags & 4) != 0) | |
18759 | { | |
18760 | unsigned int i, count; | |
757a13d0 | 18761 | |
cf2c3c16 TT |
18762 | count = read_1_byte (abfd, mac_ptr); |
18763 | ++mac_ptr; | |
18764 | for (i = 0; i < count; ++i) | |
18765 | { | |
18766 | unsigned int opcode, bytes_read; | |
18767 | unsigned long arg; | |
18768 | ||
18769 | opcode = read_1_byte (abfd, mac_ptr); | |
18770 | ++mac_ptr; | |
18771 | opcode_definitions[opcode] = mac_ptr; | |
18772 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18773 | mac_ptr += bytes_read; | |
18774 | mac_ptr += arg; | |
18775 | } | |
757a13d0 | 18776 | } |
cf2c3c16 | 18777 | } |
757a13d0 | 18778 | |
cf2c3c16 TT |
18779 | return mac_ptr; |
18780 | } | |
757a13d0 | 18781 | |
cf2c3c16 | 18782 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 18783 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
18784 | |
18785 | static void | |
d521ce57 TT |
18786 | dwarf_decode_macro_bytes (bfd *abfd, |
18787 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 18788 | struct macro_source_file *current_file, |
15d034d0 | 18789 | struct line_header *lh, const char *comp_dir, |
cf2c3c16 | 18790 | struct dwarf2_section_info *section, |
36586728 | 18791 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 18792 | unsigned int offset_size, |
8fc3fc34 TT |
18793 | struct objfile *objfile, |
18794 | htab_t include_hash) | |
cf2c3c16 TT |
18795 | { |
18796 | enum dwarf_macro_record_type macinfo_type; | |
18797 | int at_commandline; | |
d521ce57 | 18798 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 18799 | |
cf2c3c16 TT |
18800 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
18801 | &offset_size, section_is_gnu); | |
18802 | if (mac_ptr == NULL) | |
18803 | { | |
18804 | /* We already issued a complaint. */ | |
18805 | return; | |
18806 | } | |
757a13d0 JK |
18807 | |
18808 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
18809 | GDB is still reading the definitions from command line. First | |
18810 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
18811 | to create CURRENT_FILE for the main source holding also the command line | |
18812 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
18813 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
18814 | ||
18815 | at_commandline = 1; | |
18816 | ||
18817 | do | |
18818 | { | |
18819 | /* Do we at least have room for a macinfo type byte? */ | |
18820 | if (mac_ptr >= mac_end) | |
18821 | { | |
f664829e | 18822 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
18823 | break; |
18824 | } | |
18825 | ||
18826 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
18827 | mac_ptr++; | |
18828 | ||
cf2c3c16 TT |
18829 | /* Note that we rely on the fact that the corresponding GNU and |
18830 | DWARF constants are the same. */ | |
757a13d0 JK |
18831 | switch (macinfo_type) |
18832 | { | |
18833 | /* A zero macinfo type indicates the end of the macro | |
18834 | information. */ | |
18835 | case 0: | |
18836 | break; | |
2e276125 | 18837 | |
cf2c3c16 TT |
18838 | case DW_MACRO_GNU_define: |
18839 | case DW_MACRO_GNU_undef: | |
18840 | case DW_MACRO_GNU_define_indirect: | |
18841 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
18842 | case DW_MACRO_GNU_define_indirect_alt: |
18843 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 18844 | { |
891d2f0b | 18845 | unsigned int bytes_read; |
2e276125 | 18846 | int line; |
d521ce57 | 18847 | const char *body; |
cf2c3c16 | 18848 | int is_define; |
2e276125 | 18849 | |
cf2c3c16 TT |
18850 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
18851 | mac_ptr += bytes_read; | |
18852 | ||
18853 | if (macinfo_type == DW_MACRO_GNU_define | |
18854 | || macinfo_type == DW_MACRO_GNU_undef) | |
18855 | { | |
18856 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
18857 | mac_ptr += bytes_read; | |
18858 | } | |
18859 | else | |
18860 | { | |
18861 | LONGEST str_offset; | |
18862 | ||
18863 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18864 | mac_ptr += offset_size; | |
2e276125 | 18865 | |
36586728 | 18866 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
18867 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
18868 | || section_is_dwz) | |
36586728 TT |
18869 | { |
18870 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18871 | ||
18872 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
18873 | } | |
18874 | else | |
18875 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
18876 | } |
18877 | ||
18878 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
18879 | || macinfo_type == DW_MACRO_GNU_define_indirect |
18880 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 18881 | if (! current_file) |
757a13d0 JK |
18882 | { |
18883 | /* DWARF violation as no main source is present. */ | |
18884 | complaint (&symfile_complaints, | |
18885 | _("debug info with no main source gives macro %s " | |
18886 | "on line %d: %s"), | |
cf2c3c16 TT |
18887 | is_define ? _("definition") : _("undefinition"), |
18888 | line, body); | |
757a13d0 JK |
18889 | break; |
18890 | } | |
3e43a32a MS |
18891 | if ((line == 0 && !at_commandline) |
18892 | || (line != 0 && at_commandline)) | |
4d3c2250 | 18893 | complaint (&symfile_complaints, |
757a13d0 JK |
18894 | _("debug info gives %s macro %s with %s line %d: %s"), |
18895 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 18896 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
18897 | line == 0 ? _("zero") : _("non-zero"), line, body); |
18898 | ||
cf2c3c16 | 18899 | if (is_define) |
757a13d0 | 18900 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
18901 | else |
18902 | { | |
18903 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
18904 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
18905 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
18906 | macro_undef (current_file, line, body); |
18907 | } | |
2e276125 JB |
18908 | } |
18909 | break; | |
18910 | ||
cf2c3c16 | 18911 | case DW_MACRO_GNU_start_file: |
2e276125 | 18912 | { |
891d2f0b | 18913 | unsigned int bytes_read; |
2e276125 JB |
18914 | int line, file; |
18915 | ||
18916 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18917 | mac_ptr += bytes_read; | |
18918 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18919 | mac_ptr += bytes_read; | |
18920 | ||
3e43a32a MS |
18921 | if ((line == 0 && !at_commandline) |
18922 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
18923 | complaint (&symfile_complaints, |
18924 | _("debug info gives source %d included " | |
18925 | "from %s at %s line %d"), | |
18926 | file, at_commandline ? _("command-line") : _("file"), | |
18927 | line == 0 ? _("zero") : _("non-zero"), line); | |
18928 | ||
18929 | if (at_commandline) | |
18930 | { | |
cf2c3c16 TT |
18931 | /* This DW_MACRO_GNU_start_file was executed in the |
18932 | pass one. */ | |
757a13d0 JK |
18933 | at_commandline = 0; |
18934 | } | |
18935 | else | |
18936 | current_file = macro_start_file (file, line, | |
18937 | current_file, comp_dir, | |
cf2c3c16 | 18938 | lh, objfile); |
2e276125 JB |
18939 | } |
18940 | break; | |
18941 | ||
cf2c3c16 | 18942 | case DW_MACRO_GNU_end_file: |
2e276125 | 18943 | if (! current_file) |
4d3c2250 | 18944 | complaint (&symfile_complaints, |
3e43a32a MS |
18945 | _("macro debug info has an unmatched " |
18946 | "`close_file' directive")); | |
2e276125 JB |
18947 | else |
18948 | { | |
18949 | current_file = current_file->included_by; | |
18950 | if (! current_file) | |
18951 | { | |
cf2c3c16 | 18952 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
18953 | |
18954 | /* GCC circa March 2002 doesn't produce the zero | |
18955 | type byte marking the end of the compilation | |
18956 | unit. Complain if it's not there, but exit no | |
18957 | matter what. */ | |
18958 | ||
18959 | /* Do we at least have room for a macinfo type byte? */ | |
18960 | if (mac_ptr >= mac_end) | |
18961 | { | |
f664829e | 18962 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
18963 | return; |
18964 | } | |
18965 | ||
18966 | /* We don't increment mac_ptr here, so this is just | |
18967 | a look-ahead. */ | |
18968 | next_type = read_1_byte (abfd, mac_ptr); | |
18969 | if (next_type != 0) | |
4d3c2250 | 18970 | complaint (&symfile_complaints, |
3e43a32a MS |
18971 | _("no terminating 0-type entry for " |
18972 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
18973 | |
18974 | return; | |
18975 | } | |
18976 | } | |
18977 | break; | |
18978 | ||
cf2c3c16 | 18979 | case DW_MACRO_GNU_transparent_include: |
36586728 | 18980 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
18981 | { |
18982 | LONGEST offset; | |
8fc3fc34 | 18983 | void **slot; |
a036ba48 TT |
18984 | bfd *include_bfd = abfd; |
18985 | struct dwarf2_section_info *include_section = section; | |
18986 | struct dwarf2_section_info alt_section; | |
d521ce57 | 18987 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 18988 | int is_dwz = section_is_dwz; |
d521ce57 | 18989 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
18990 | |
18991 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18992 | mac_ptr += offset_size; | |
18993 | ||
a036ba48 TT |
18994 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
18995 | { | |
18996 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18997 | ||
18998 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
18999 | &dwz->macro); | |
19000 | ||
19001 | include_bfd = dwz->macro.asection->owner; | |
19002 | include_section = &dwz->macro; | |
19003 | include_mac_end = dwz->macro.buffer + dwz->macro.size; | |
19004 | is_dwz = 1; | |
19005 | } | |
19006 | ||
19007 | new_mac_ptr = include_section->buffer + offset; | |
19008 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
19009 | ||
8fc3fc34 TT |
19010 | if (*slot != NULL) |
19011 | { | |
19012 | /* This has actually happened; see | |
19013 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
19014 | complaint (&symfile_complaints, | |
19015 | _("recursive DW_MACRO_GNU_transparent_include in " | |
19016 | ".debug_macro section")); | |
19017 | } | |
19018 | else | |
19019 | { | |
d521ce57 | 19020 | *slot = (void *) new_mac_ptr; |
36586728 | 19021 | |
a036ba48 | 19022 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 19023 | include_mac_end, current_file, |
8fc3fc34 | 19024 | lh, comp_dir, |
36586728 | 19025 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
19026 | offset_size, objfile, include_hash); |
19027 | ||
d521ce57 | 19028 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 19029 | } |
cf2c3c16 TT |
19030 | } |
19031 | break; | |
19032 | ||
2e276125 | 19033 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
19034 | if (!section_is_gnu) |
19035 | { | |
19036 | unsigned int bytes_read; | |
19037 | int constant; | |
2e276125 | 19038 | |
cf2c3c16 TT |
19039 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
19040 | mac_ptr += bytes_read; | |
19041 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19042 | mac_ptr += bytes_read; | |
2e276125 | 19043 | |
cf2c3c16 TT |
19044 | /* We don't recognize any vendor extensions. */ |
19045 | break; | |
19046 | } | |
19047 | /* FALLTHROUGH */ | |
19048 | ||
19049 | default: | |
19050 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 19051 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
19052 | section); |
19053 | if (mac_ptr == NULL) | |
19054 | return; | |
19055 | break; | |
2e276125 | 19056 | } |
757a13d0 | 19057 | } while (macinfo_type != 0); |
2e276125 | 19058 | } |
8e19ed76 | 19059 | |
cf2c3c16 | 19060 | static void |
09262596 | 19061 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
15d034d0 | 19062 | const char *comp_dir, int section_is_gnu) |
cf2c3c16 | 19063 | { |
bb5ed363 | 19064 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
19065 | struct line_header *lh = cu->line_header; |
19066 | bfd *abfd; | |
d521ce57 | 19067 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
19068 | struct macro_source_file *current_file = 0; |
19069 | enum dwarf_macro_record_type macinfo_type; | |
19070 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 19071 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
19072 | struct cleanup *cleanup; |
19073 | htab_t include_hash; | |
19074 | void **slot; | |
09262596 DE |
19075 | struct dwarf2_section_info *section; |
19076 | const char *section_name; | |
19077 | ||
19078 | if (cu->dwo_unit != NULL) | |
19079 | { | |
19080 | if (section_is_gnu) | |
19081 | { | |
19082 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
19083 | section_name = ".debug_macro.dwo"; | |
19084 | } | |
19085 | else | |
19086 | { | |
19087 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
19088 | section_name = ".debug_macinfo.dwo"; | |
19089 | } | |
19090 | } | |
19091 | else | |
19092 | { | |
19093 | if (section_is_gnu) | |
19094 | { | |
19095 | section = &dwarf2_per_objfile->macro; | |
19096 | section_name = ".debug_macro"; | |
19097 | } | |
19098 | else | |
19099 | { | |
19100 | section = &dwarf2_per_objfile->macinfo; | |
19101 | section_name = ".debug_macinfo"; | |
19102 | } | |
19103 | } | |
cf2c3c16 | 19104 | |
bb5ed363 | 19105 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
19106 | if (section->buffer == NULL) |
19107 | { | |
fceca515 | 19108 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
19109 | return; |
19110 | } | |
09262596 | 19111 | abfd = section->asection->owner; |
cf2c3c16 TT |
19112 | |
19113 | /* First pass: Find the name of the base filename. | |
19114 | This filename is needed in order to process all macros whose definition | |
19115 | (or undefinition) comes from the command line. These macros are defined | |
19116 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
19117 | associated to the base file. | |
19118 | ||
19119 | To determine the base file name, we scan the macro definitions until we | |
19120 | reach the first DW_MACINFO_start_file entry. We then initialize | |
19121 | CURRENT_FILE accordingly so that any macro definition found before the | |
19122 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
19123 | ||
19124 | mac_ptr = section->buffer + offset; | |
19125 | mac_end = section->buffer + section->size; | |
19126 | ||
19127 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
19128 | &offset_size, section_is_gnu); | |
19129 | if (mac_ptr == NULL) | |
19130 | { | |
19131 | /* We already issued a complaint. */ | |
19132 | return; | |
19133 | } | |
19134 | ||
19135 | do | |
19136 | { | |
19137 | /* Do we at least have room for a macinfo type byte? */ | |
19138 | if (mac_ptr >= mac_end) | |
19139 | { | |
19140 | /* Complaint is printed during the second pass as GDB will probably | |
19141 | stop the first pass earlier upon finding | |
19142 | DW_MACINFO_start_file. */ | |
19143 | break; | |
19144 | } | |
19145 | ||
19146 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
19147 | mac_ptr++; | |
19148 | ||
19149 | /* Note that we rely on the fact that the corresponding GNU and | |
19150 | DWARF constants are the same. */ | |
19151 | switch (macinfo_type) | |
19152 | { | |
19153 | /* A zero macinfo type indicates the end of the macro | |
19154 | information. */ | |
19155 | case 0: | |
19156 | break; | |
19157 | ||
19158 | case DW_MACRO_GNU_define: | |
19159 | case DW_MACRO_GNU_undef: | |
19160 | /* Only skip the data by MAC_PTR. */ | |
19161 | { | |
19162 | unsigned int bytes_read; | |
19163 | ||
19164 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19165 | mac_ptr += bytes_read; | |
19166 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19167 | mac_ptr += bytes_read; | |
19168 | } | |
19169 | break; | |
19170 | ||
19171 | case DW_MACRO_GNU_start_file: | |
19172 | { | |
19173 | unsigned int bytes_read; | |
19174 | int line, file; | |
19175 | ||
19176 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19177 | mac_ptr += bytes_read; | |
19178 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19179 | mac_ptr += bytes_read; | |
19180 | ||
19181 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 19182 | comp_dir, lh, objfile); |
cf2c3c16 TT |
19183 | } |
19184 | break; | |
19185 | ||
19186 | case DW_MACRO_GNU_end_file: | |
19187 | /* No data to skip by MAC_PTR. */ | |
19188 | break; | |
19189 | ||
19190 | case DW_MACRO_GNU_define_indirect: | |
19191 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
19192 | case DW_MACRO_GNU_define_indirect_alt: |
19193 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
19194 | { |
19195 | unsigned int bytes_read; | |
19196 | ||
19197 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19198 | mac_ptr += bytes_read; | |
19199 | mac_ptr += offset_size; | |
19200 | } | |
19201 | break; | |
19202 | ||
19203 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 19204 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
19205 | /* Note that, according to the spec, a transparent include |
19206 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
19207 | skip this opcode. */ | |
19208 | mac_ptr += offset_size; | |
19209 | break; | |
19210 | ||
19211 | case DW_MACINFO_vendor_ext: | |
19212 | /* Only skip the data by MAC_PTR. */ | |
19213 | if (!section_is_gnu) | |
19214 | { | |
19215 | unsigned int bytes_read; | |
19216 | ||
19217 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19218 | mac_ptr += bytes_read; | |
19219 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19220 | mac_ptr += bytes_read; | |
19221 | } | |
19222 | /* FALLTHROUGH */ | |
19223 | ||
19224 | default: | |
19225 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 19226 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
19227 | section); |
19228 | if (mac_ptr == NULL) | |
19229 | return; | |
19230 | break; | |
19231 | } | |
19232 | } while (macinfo_type != 0 && current_file == NULL); | |
19233 | ||
19234 | /* Second pass: Process all entries. | |
19235 | ||
19236 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
19237 | command-line macro definitions/undefinitions. This flag is unset when we | |
19238 | reach the first DW_MACINFO_start_file entry. */ | |
19239 | ||
8fc3fc34 TT |
19240 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
19241 | NULL, xcalloc, xfree); | |
19242 | cleanup = make_cleanup_htab_delete (include_hash); | |
19243 | mac_ptr = section->buffer + offset; | |
19244 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 19245 | *slot = (void *) mac_ptr; |
8fc3fc34 | 19246 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
36586728 TT |
19247 | current_file, lh, comp_dir, section, |
19248 | section_is_gnu, 0, | |
8fc3fc34 TT |
19249 | offset_size, objfile, include_hash); |
19250 | do_cleanups (cleanup); | |
cf2c3c16 TT |
19251 | } |
19252 | ||
8e19ed76 | 19253 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 19254 | if so return true else false. */ |
380bca97 | 19255 | |
8e19ed76 PS |
19256 | static int |
19257 | attr_form_is_block (struct attribute *attr) | |
19258 | { | |
19259 | return (attr == NULL ? 0 : | |
19260 | attr->form == DW_FORM_block1 | |
19261 | || attr->form == DW_FORM_block2 | |
19262 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
19263 | || attr->form == DW_FORM_block |
19264 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 19265 | } |
4c2df51b | 19266 | |
c6a0999f JB |
19267 | /* Return non-zero if ATTR's value is a section offset --- classes |
19268 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
19269 | You may use DW_UNSND (attr) to retrieve such offsets. | |
19270 | ||
19271 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
19272 | may have a value that belongs to more than one of these classes; it | |
19273 | would be ambiguous if we did, because we use the same forms for all | |
19274 | of them. */ | |
380bca97 | 19275 | |
3690dd37 JB |
19276 | static int |
19277 | attr_form_is_section_offset (struct attribute *attr) | |
19278 | { | |
19279 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
19280 | || attr->form == DW_FORM_data8 |
19281 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
19282 | } |
19283 | ||
3690dd37 JB |
19284 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
19285 | zero otherwise. When this function returns true, you can apply | |
19286 | dwarf2_get_attr_constant_value to it. | |
19287 | ||
19288 | However, note that for some attributes you must check | |
19289 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
19290 | and DW_FORM_data8 are members of both the constant class, and of | |
19291 | the classes that contain offsets into other debug sections | |
19292 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
19293 | that, if an attribute's can be either a constant or one of the | |
19294 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
19295 | taken as section offsets, not constants. */ | |
380bca97 | 19296 | |
3690dd37 JB |
19297 | static int |
19298 | attr_form_is_constant (struct attribute *attr) | |
19299 | { | |
19300 | switch (attr->form) | |
19301 | { | |
19302 | case DW_FORM_sdata: | |
19303 | case DW_FORM_udata: | |
19304 | case DW_FORM_data1: | |
19305 | case DW_FORM_data2: | |
19306 | case DW_FORM_data4: | |
19307 | case DW_FORM_data8: | |
19308 | return 1; | |
19309 | default: | |
19310 | return 0; | |
19311 | } | |
19312 | } | |
19313 | ||
3019eac3 DE |
19314 | /* Return the .debug_loc section to use for CU. |
19315 | For DWO files use .debug_loc.dwo. */ | |
19316 | ||
19317 | static struct dwarf2_section_info * | |
19318 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
19319 | { | |
19320 | if (cu->dwo_unit) | |
19321 | return &cu->dwo_unit->dwo_file->sections.loc; | |
19322 | return &dwarf2_per_objfile->loc; | |
19323 | } | |
19324 | ||
8cf6f0b1 TT |
19325 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
19326 | ||
19327 | static void | |
19328 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
19329 | struct dwarf2_loclist_baton *baton, | |
19330 | struct attribute *attr) | |
19331 | { | |
3019eac3 DE |
19332 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
19333 | ||
19334 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
19335 | |
19336 | baton->per_cu = cu->per_cu; | |
19337 | gdb_assert (baton->per_cu); | |
19338 | /* We don't know how long the location list is, but make sure we | |
19339 | don't run off the edge of the section. */ | |
3019eac3 DE |
19340 | baton->size = section->size - DW_UNSND (attr); |
19341 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 19342 | baton->base_address = cu->base_address; |
f664829e | 19343 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
19344 | } |
19345 | ||
4c2df51b DJ |
19346 | static void |
19347 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, | |
f1e6e072 | 19348 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 19349 | { |
bb5ed363 | 19350 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 19351 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 19352 | |
3690dd37 | 19353 | if (attr_form_is_section_offset (attr) |
3019eac3 | 19354 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
19355 | the section. If so, fall through to the complaint in the |
19356 | other branch. */ | |
3019eac3 | 19357 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 19358 | { |
0d53c4c4 | 19359 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 19360 | |
bb5ed363 | 19361 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 19362 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 19363 | |
8cf6f0b1 | 19364 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 19365 | |
d00adf39 | 19366 | if (cu->base_known == 0) |
0d53c4c4 | 19367 | complaint (&symfile_complaints, |
3e43a32a MS |
19368 | _("Location list used without " |
19369 | "specifying the CU base address.")); | |
4c2df51b | 19370 | |
f1e6e072 TT |
19371 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
19372 | ? dwarf2_loclist_block_index | |
19373 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
19374 | SYMBOL_LOCATION_BATON (sym) = baton; |
19375 | } | |
19376 | else | |
19377 | { | |
19378 | struct dwarf2_locexpr_baton *baton; | |
19379 | ||
bb5ed363 | 19380 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 19381 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
19382 | baton->per_cu = cu->per_cu; |
19383 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
19384 | |
19385 | if (attr_form_is_block (attr)) | |
19386 | { | |
19387 | /* Note that we're just copying the block's data pointer | |
19388 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
19389 | info_buffer for SYM's objfile; right now we never release |
19390 | that buffer, but when we do clean up properly this may | |
19391 | need to change. */ | |
0d53c4c4 DJ |
19392 | baton->size = DW_BLOCK (attr)->size; |
19393 | baton->data = DW_BLOCK (attr)->data; | |
19394 | } | |
19395 | else | |
19396 | { | |
19397 | dwarf2_invalid_attrib_class_complaint ("location description", | |
19398 | SYMBOL_NATURAL_NAME (sym)); | |
19399 | baton->size = 0; | |
0d53c4c4 | 19400 | } |
6e70227d | 19401 | |
f1e6e072 TT |
19402 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
19403 | ? dwarf2_locexpr_block_index | |
19404 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
19405 | SYMBOL_LOCATION_BATON (sym) = baton; |
19406 | } | |
4c2df51b | 19407 | } |
6502dd73 | 19408 | |
9aa1f1e3 TT |
19409 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
19410 | came from a separate debuginfo file, then the master objfile is | |
19411 | returned. */ | |
ae0d2f24 UW |
19412 | |
19413 | struct objfile * | |
19414 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
19415 | { | |
9291a0cd | 19416 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
19417 | |
19418 | /* Return the master objfile, so that we can report and look up the | |
19419 | correct file containing this variable. */ | |
19420 | if (objfile->separate_debug_objfile_backlink) | |
19421 | objfile = objfile->separate_debug_objfile_backlink; | |
19422 | ||
19423 | return objfile; | |
19424 | } | |
19425 | ||
96408a79 SA |
19426 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
19427 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
19428 | CU_HEADERP first. */ | |
19429 | ||
19430 | static const struct comp_unit_head * | |
19431 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
19432 | struct dwarf2_per_cu_data *per_cu) | |
19433 | { | |
d521ce57 | 19434 | const gdb_byte *info_ptr; |
96408a79 SA |
19435 | |
19436 | if (per_cu->cu) | |
19437 | return &per_cu->cu->header; | |
19438 | ||
8a0459fd | 19439 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
19440 | |
19441 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 19442 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
19443 | |
19444 | return cu_headerp; | |
19445 | } | |
19446 | ||
ae0d2f24 UW |
19447 | /* Return the address size given in the compilation unit header for CU. */ |
19448 | ||
98714339 | 19449 | int |
ae0d2f24 UW |
19450 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
19451 | { | |
96408a79 SA |
19452 | struct comp_unit_head cu_header_local; |
19453 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 19454 | |
96408a79 SA |
19455 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
19456 | ||
19457 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
19458 | } |
19459 | ||
9eae7c52 TT |
19460 | /* Return the offset size given in the compilation unit header for CU. */ |
19461 | ||
19462 | int | |
19463 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
19464 | { | |
96408a79 SA |
19465 | struct comp_unit_head cu_header_local; |
19466 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 19467 | |
96408a79 SA |
19468 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
19469 | ||
19470 | return cu_headerp->offset_size; | |
19471 | } | |
19472 | ||
19473 | /* See its dwarf2loc.h declaration. */ | |
19474 | ||
19475 | int | |
19476 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
19477 | { | |
19478 | struct comp_unit_head cu_header_local; | |
19479 | const struct comp_unit_head *cu_headerp; | |
19480 | ||
19481 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
19482 | ||
19483 | if (cu_headerp->version == 2) | |
19484 | return cu_headerp->addr_size; | |
19485 | else | |
19486 | return cu_headerp->offset_size; | |
181cebd4 JK |
19487 | } |
19488 | ||
9aa1f1e3 TT |
19489 | /* Return the text offset of the CU. The returned offset comes from |
19490 | this CU's objfile. If this objfile came from a separate debuginfo | |
19491 | file, then the offset may be different from the corresponding | |
19492 | offset in the parent objfile. */ | |
19493 | ||
19494 | CORE_ADDR | |
19495 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
19496 | { | |
bb3fa9d0 | 19497 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
19498 | |
19499 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
19500 | } | |
19501 | ||
348e048f DE |
19502 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
19503 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
19504 | |
19505 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 19506 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 19507 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
19508 | struct objfile *objfile) |
19509 | { | |
19510 | struct dwarf2_per_cu_data *this_cu; | |
19511 | int low, high; | |
36586728 | 19512 | const sect_offset *cu_off; |
ae038cb0 | 19513 | |
ae038cb0 DJ |
19514 | low = 0; |
19515 | high = dwarf2_per_objfile->n_comp_units - 1; | |
19516 | while (high > low) | |
19517 | { | |
36586728 | 19518 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 19519 | int mid = low + (high - low) / 2; |
9a619af0 | 19520 | |
36586728 TT |
19521 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
19522 | cu_off = &mid_cu->offset; | |
19523 | if (mid_cu->is_dwz > offset_in_dwz | |
19524 | || (mid_cu->is_dwz == offset_in_dwz | |
19525 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
19526 | high = mid; |
19527 | else | |
19528 | low = mid + 1; | |
19529 | } | |
19530 | gdb_assert (low == high); | |
36586728 TT |
19531 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
19532 | cu_off = &this_cu->offset; | |
19533 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 19534 | { |
36586728 | 19535 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
19536 | error (_("Dwarf Error: could not find partial DIE containing " |
19537 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 19538 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 19539 | |
b64f50a1 JK |
19540 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
19541 | <= offset.sect_off); | |
ae038cb0 DJ |
19542 | return dwarf2_per_objfile->all_comp_units[low-1]; |
19543 | } | |
19544 | else | |
19545 | { | |
19546 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
19547 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
19548 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
19549 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
19550 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
19551 | return this_cu; |
19552 | } | |
19553 | } | |
19554 | ||
23745b47 | 19555 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 19556 | |
9816fde3 | 19557 | static void |
23745b47 | 19558 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 19559 | { |
9816fde3 | 19560 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
19561 | per_cu->cu = cu; |
19562 | cu->per_cu = per_cu; | |
19563 | cu->objfile = per_cu->objfile; | |
93311388 | 19564 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
19565 | } |
19566 | ||
19567 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
19568 | ||
19569 | static void | |
95554aad TT |
19570 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
19571 | enum language pretend_language) | |
9816fde3 JK |
19572 | { |
19573 | struct attribute *attr; | |
19574 | ||
19575 | /* Set the language we're debugging. */ | |
19576 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
19577 | if (attr) | |
19578 | set_cu_language (DW_UNSND (attr), cu); | |
19579 | else | |
9cded63f | 19580 | { |
95554aad | 19581 | cu->language = pretend_language; |
9cded63f TT |
19582 | cu->language_defn = language_def (cu->language); |
19583 | } | |
dee91e82 DE |
19584 | |
19585 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
19586 | if (attr) | |
19587 | cu->producer = DW_STRING (attr); | |
93311388 DE |
19588 | } |
19589 | ||
ae038cb0 DJ |
19590 | /* Release one cached compilation unit, CU. We unlink it from the tree |
19591 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
19592 | the caller is responsible for that. |
19593 | NOTE: DATA is a void * because this function is also used as a | |
19594 | cleanup routine. */ | |
ae038cb0 DJ |
19595 | |
19596 | static void | |
68dc6402 | 19597 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
19598 | { |
19599 | struct dwarf2_cu *cu = data; | |
19600 | ||
23745b47 DE |
19601 | gdb_assert (cu->per_cu != NULL); |
19602 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
19603 | cu->per_cu = NULL; |
19604 | ||
19605 | obstack_free (&cu->comp_unit_obstack, NULL); | |
19606 | ||
19607 | xfree (cu); | |
19608 | } | |
19609 | ||
72bf9492 | 19610 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 19611 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 19612 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
19613 | |
19614 | static void | |
19615 | free_stack_comp_unit (void *data) | |
19616 | { | |
19617 | struct dwarf2_cu *cu = data; | |
19618 | ||
23745b47 DE |
19619 | gdb_assert (cu->per_cu != NULL); |
19620 | cu->per_cu->cu = NULL; | |
19621 | cu->per_cu = NULL; | |
19622 | ||
72bf9492 DJ |
19623 | obstack_free (&cu->comp_unit_obstack, NULL); |
19624 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
19625 | } |
19626 | ||
19627 | /* Free all cached compilation units. */ | |
19628 | ||
19629 | static void | |
19630 | free_cached_comp_units (void *data) | |
19631 | { | |
19632 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19633 | ||
19634 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19635 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19636 | while (per_cu != NULL) | |
19637 | { | |
19638 | struct dwarf2_per_cu_data *next_cu; | |
19639 | ||
19640 | next_cu = per_cu->cu->read_in_chain; | |
19641 | ||
68dc6402 | 19642 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19643 | *last_chain = next_cu; |
19644 | ||
19645 | per_cu = next_cu; | |
19646 | } | |
19647 | } | |
19648 | ||
19649 | /* Increase the age counter on each cached compilation unit, and free | |
19650 | any that are too old. */ | |
19651 | ||
19652 | static void | |
19653 | age_cached_comp_units (void) | |
19654 | { | |
19655 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19656 | ||
19657 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
19658 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19659 | while (per_cu != NULL) | |
19660 | { | |
19661 | per_cu->cu->last_used ++; | |
19662 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
19663 | dwarf2_mark (per_cu->cu); | |
19664 | per_cu = per_cu->cu->read_in_chain; | |
19665 | } | |
19666 | ||
19667 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19668 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19669 | while (per_cu != NULL) | |
19670 | { | |
19671 | struct dwarf2_per_cu_data *next_cu; | |
19672 | ||
19673 | next_cu = per_cu->cu->read_in_chain; | |
19674 | ||
19675 | if (!per_cu->cu->mark) | |
19676 | { | |
68dc6402 | 19677 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19678 | *last_chain = next_cu; |
19679 | } | |
19680 | else | |
19681 | last_chain = &per_cu->cu->read_in_chain; | |
19682 | ||
19683 | per_cu = next_cu; | |
19684 | } | |
19685 | } | |
19686 | ||
19687 | /* Remove a single compilation unit from the cache. */ | |
19688 | ||
19689 | static void | |
dee91e82 | 19690 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
19691 | { |
19692 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19693 | ||
19694 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19695 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19696 | while (per_cu != NULL) | |
19697 | { | |
19698 | struct dwarf2_per_cu_data *next_cu; | |
19699 | ||
19700 | next_cu = per_cu->cu->read_in_chain; | |
19701 | ||
dee91e82 | 19702 | if (per_cu == target_per_cu) |
ae038cb0 | 19703 | { |
68dc6402 | 19704 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 19705 | per_cu->cu = NULL; |
ae038cb0 DJ |
19706 | *last_chain = next_cu; |
19707 | break; | |
19708 | } | |
19709 | else | |
19710 | last_chain = &per_cu->cu->read_in_chain; | |
19711 | ||
19712 | per_cu = next_cu; | |
19713 | } | |
19714 | } | |
19715 | ||
fe3e1990 DJ |
19716 | /* Release all extra memory associated with OBJFILE. */ |
19717 | ||
19718 | void | |
19719 | dwarf2_free_objfile (struct objfile *objfile) | |
19720 | { | |
19721 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
19722 | ||
19723 | if (dwarf2_per_objfile == NULL) | |
19724 | return; | |
19725 | ||
19726 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
19727 | free_cached_comp_units (NULL); | |
19728 | ||
7b9f3c50 DE |
19729 | if (dwarf2_per_objfile->quick_file_names_table) |
19730 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 19731 | |
fe3e1990 DJ |
19732 | /* Everything else should be on the objfile obstack. */ |
19733 | } | |
19734 | ||
dee91e82 DE |
19735 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
19736 | We store these in a hash table separate from the DIEs, and preserve them | |
19737 | when the DIEs are flushed out of cache. | |
19738 | ||
19739 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 19740 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
19741 | or the type may come from a DWO file. Furthermore, while it's more logical |
19742 | to use per_cu->section+offset, with Fission the section with the data is in | |
19743 | the DWO file but we don't know that section at the point we need it. | |
19744 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
19745 | because we can enter the lookup routine, get_die_type_at_offset, from | |
19746 | outside this file, and thus won't necessarily have PER_CU->cu. | |
19747 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 19748 | |
dee91e82 | 19749 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 19750 | { |
dee91e82 | 19751 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 19752 | sect_offset offset; |
1c379e20 DJ |
19753 | struct type *type; |
19754 | }; | |
19755 | ||
dee91e82 | 19756 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19757 | |
19758 | static hashval_t | |
dee91e82 | 19759 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 19760 | { |
dee91e82 | 19761 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 19762 | |
dee91e82 | 19763 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
19764 | } |
19765 | ||
dee91e82 | 19766 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19767 | |
19768 | static int | |
dee91e82 | 19769 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 19770 | { |
dee91e82 DE |
19771 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
19772 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 19773 | |
dee91e82 DE |
19774 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
19775 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
19776 | } |
19777 | ||
19778 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
19779 | table if necessary. For convenience, return TYPE. |
19780 | ||
19781 | The DIEs reading must have careful ordering to: | |
19782 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
19783 | reading current DIE. | |
19784 | * Not trying to dereference contents of still incompletely read in types | |
19785 | while reading in other DIEs. | |
19786 | * Enable referencing still incompletely read in types just by a pointer to | |
19787 | the type without accessing its fields. | |
19788 | ||
19789 | Therefore caller should follow these rules: | |
19790 | * Try to fetch any prerequisite types we may need to build this DIE type | |
19791 | before building the type and calling set_die_type. | |
e71ec853 | 19792 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
19793 | possible before fetching more types to complete the current type. |
19794 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 19795 | |
f792889a | 19796 | static struct type * |
1c379e20 DJ |
19797 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
19798 | { | |
dee91e82 | 19799 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 19800 | struct objfile *objfile = cu->objfile; |
1c379e20 | 19801 | |
b4ba55a1 JB |
19802 | /* For Ada types, make sure that the gnat-specific data is always |
19803 | initialized (if not already set). There are a few types where | |
19804 | we should not be doing so, because the type-specific area is | |
19805 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
19806 | where the type-specific area is used to store the floatformat). | |
19807 | But this is not a problem, because the gnat-specific information | |
19808 | is actually not needed for these types. */ | |
19809 | if (need_gnat_info (cu) | |
19810 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
19811 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
19812 | && !HAVE_GNAT_AUX_INFO (type)) | |
19813 | INIT_GNAT_SPECIFIC (type); | |
19814 | ||
dee91e82 | 19815 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19816 | { |
dee91e82 DE |
19817 | dwarf2_per_objfile->die_type_hash = |
19818 | htab_create_alloc_ex (127, | |
19819 | per_cu_offset_and_type_hash, | |
19820 | per_cu_offset_and_type_eq, | |
19821 | NULL, | |
19822 | &objfile->objfile_obstack, | |
19823 | hashtab_obstack_allocate, | |
19824 | dummy_obstack_deallocate); | |
f792889a | 19825 | } |
1c379e20 | 19826 | |
dee91e82 | 19827 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
19828 | ofs.offset = die->offset; |
19829 | ofs.type = type; | |
dee91e82 DE |
19830 | slot = (struct dwarf2_per_cu_offset_and_type **) |
19831 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
19832 | if (*slot) |
19833 | complaint (&symfile_complaints, | |
19834 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 19835 | die->offset.sect_off); |
673bfd45 | 19836 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 19837 | **slot = ofs; |
f792889a | 19838 | return type; |
1c379e20 DJ |
19839 | } |
19840 | ||
02142a6c DE |
19841 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
19842 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
19843 | |
19844 | static struct type * | |
b64f50a1 | 19845 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 19846 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 19847 | { |
dee91e82 | 19848 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 19849 | |
dee91e82 | 19850 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19851 | return NULL; |
1c379e20 | 19852 | |
dee91e82 | 19853 | ofs.per_cu = per_cu; |
673bfd45 | 19854 | ofs.offset = offset; |
dee91e82 | 19855 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
19856 | if (slot) |
19857 | return slot->type; | |
19858 | else | |
19859 | return NULL; | |
19860 | } | |
19861 | ||
02142a6c | 19862 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
19863 | or return NULL if DIE does not have a saved type. */ |
19864 | ||
19865 | static struct type * | |
19866 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
19867 | { | |
19868 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
19869 | } | |
19870 | ||
10b3939b DJ |
19871 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
19872 | ||
19873 | static void | |
19874 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
19875 | struct dwarf2_per_cu_data *ref_per_cu) | |
19876 | { | |
19877 | void **slot; | |
19878 | ||
19879 | if (cu->dependencies == NULL) | |
19880 | cu->dependencies | |
19881 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
19882 | NULL, &cu->comp_unit_obstack, | |
19883 | hashtab_obstack_allocate, | |
19884 | dummy_obstack_deallocate); | |
19885 | ||
19886 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
19887 | if (*slot == NULL) | |
19888 | *slot = ref_per_cu; | |
19889 | } | |
1c379e20 | 19890 | |
f504f079 DE |
19891 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
19892 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
19893 | cache that we must keep because we are keeping CU. */ |
19894 | ||
10b3939b DJ |
19895 | static int |
19896 | dwarf2_mark_helper (void **slot, void *data) | |
19897 | { | |
19898 | struct dwarf2_per_cu_data *per_cu; | |
19899 | ||
19900 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
19901 | |
19902 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
19903 | reading of the chain. As such dependencies remain valid it is not much | |
19904 | useful to track and undo them during QUIT cleanups. */ | |
19905 | if (per_cu->cu == NULL) | |
19906 | return 1; | |
19907 | ||
10b3939b DJ |
19908 | if (per_cu->cu->mark) |
19909 | return 1; | |
19910 | per_cu->cu->mark = 1; | |
19911 | ||
19912 | if (per_cu->cu->dependencies != NULL) | |
19913 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
19914 | ||
19915 | return 1; | |
19916 | } | |
19917 | ||
f504f079 DE |
19918 | /* Set the mark field in CU and in every other compilation unit in the |
19919 | cache that we must keep because we are keeping CU. */ | |
19920 | ||
ae038cb0 DJ |
19921 | static void |
19922 | dwarf2_mark (struct dwarf2_cu *cu) | |
19923 | { | |
19924 | if (cu->mark) | |
19925 | return; | |
19926 | cu->mark = 1; | |
10b3939b DJ |
19927 | if (cu->dependencies != NULL) |
19928 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
19929 | } |
19930 | ||
19931 | static void | |
19932 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
19933 | { | |
19934 | while (per_cu) | |
19935 | { | |
19936 | per_cu->cu->mark = 0; | |
19937 | per_cu = per_cu->cu->read_in_chain; | |
19938 | } | |
72bf9492 DJ |
19939 | } |
19940 | ||
72bf9492 DJ |
19941 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
19942 | is its offset in .debug_info for this objfile. */ | |
19943 | ||
19944 | static hashval_t | |
19945 | partial_die_hash (const void *item) | |
19946 | { | |
19947 | const struct partial_die_info *part_die = item; | |
9a619af0 | 19948 | |
b64f50a1 | 19949 | return part_die->offset.sect_off; |
72bf9492 DJ |
19950 | } |
19951 | ||
19952 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
19953 | are equal if they have the same offset. */ | |
19954 | ||
19955 | static int | |
19956 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
19957 | { | |
19958 | const struct partial_die_info *part_die_lhs = item_lhs; | |
19959 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 19960 | |
b64f50a1 | 19961 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
19962 | } |
19963 | ||
ae038cb0 DJ |
19964 | static struct cmd_list_element *set_dwarf2_cmdlist; |
19965 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
19966 | ||
19967 | static void | |
19968 | set_dwarf2_cmd (char *args, int from_tty) | |
19969 | { | |
19970 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
19971 | } | |
19972 | ||
19973 | static void | |
19974 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 19975 | { |
ae038cb0 DJ |
19976 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
19977 | } | |
19978 | ||
4bf44c1c | 19979 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
19980 | |
19981 | static void | |
c1bd65d0 | 19982 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
19983 | { |
19984 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 19985 | int ix; |
8b70b953 | 19986 | |
95554aad TT |
19987 | for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix) |
19988 | VEC_free (dwarf2_per_cu_ptr, | |
796a7ff8 DE |
19989 | dwarf2_per_objfile->all_comp_units[ix]->imported_symtabs); |
19990 | ||
19991 | for (ix = 0; ix < dwarf2_per_objfile->n_type_units; ++ix) | |
19992 | VEC_free (dwarf2_per_cu_ptr, | |
19993 | dwarf2_per_objfile->all_type_units[ix]->per_cu.imported_symtabs); | |
95554aad | 19994 | |
8b70b953 | 19995 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
19996 | |
19997 | if (data->dwo_files) | |
19998 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
19999 | if (data->dwp_file) |
20000 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
20001 | |
20002 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
20003 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
20004 | } |
20005 | ||
20006 | \f | |
ae2de4f8 | 20007 | /* The "save gdb-index" command. */ |
9291a0cd TT |
20008 | |
20009 | /* The contents of the hash table we create when building the string | |
20010 | table. */ | |
20011 | struct strtab_entry | |
20012 | { | |
20013 | offset_type offset; | |
20014 | const char *str; | |
20015 | }; | |
20016 | ||
559a7a62 JK |
20017 | /* Hash function for a strtab_entry. |
20018 | ||
20019 | Function is used only during write_hash_table so no index format backward | |
20020 | compatibility is needed. */ | |
b89be57b | 20021 | |
9291a0cd TT |
20022 | static hashval_t |
20023 | hash_strtab_entry (const void *e) | |
20024 | { | |
20025 | const struct strtab_entry *entry = e; | |
559a7a62 | 20026 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
20027 | } |
20028 | ||
20029 | /* Equality function for a strtab_entry. */ | |
b89be57b | 20030 | |
9291a0cd TT |
20031 | static int |
20032 | eq_strtab_entry (const void *a, const void *b) | |
20033 | { | |
20034 | const struct strtab_entry *ea = a; | |
20035 | const struct strtab_entry *eb = b; | |
20036 | return !strcmp (ea->str, eb->str); | |
20037 | } | |
20038 | ||
20039 | /* Create a strtab_entry hash table. */ | |
b89be57b | 20040 | |
9291a0cd TT |
20041 | static htab_t |
20042 | create_strtab (void) | |
20043 | { | |
20044 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
20045 | xfree, xcalloc, xfree); | |
20046 | } | |
20047 | ||
20048 | /* Add a string to the constant pool. Return the string's offset in | |
20049 | host order. */ | |
b89be57b | 20050 | |
9291a0cd TT |
20051 | static offset_type |
20052 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
20053 | { | |
20054 | void **slot; | |
20055 | struct strtab_entry entry; | |
20056 | struct strtab_entry *result; | |
20057 | ||
20058 | entry.str = str; | |
20059 | slot = htab_find_slot (table, &entry, INSERT); | |
20060 | if (*slot) | |
20061 | result = *slot; | |
20062 | else | |
20063 | { | |
20064 | result = XNEW (struct strtab_entry); | |
20065 | result->offset = obstack_object_size (cpool); | |
20066 | result->str = str; | |
20067 | obstack_grow_str0 (cpool, str); | |
20068 | *slot = result; | |
20069 | } | |
20070 | return result->offset; | |
20071 | } | |
20072 | ||
20073 | /* An entry in the symbol table. */ | |
20074 | struct symtab_index_entry | |
20075 | { | |
20076 | /* The name of the symbol. */ | |
20077 | const char *name; | |
20078 | /* The offset of the name in the constant pool. */ | |
20079 | offset_type index_offset; | |
20080 | /* A sorted vector of the indices of all the CUs that hold an object | |
20081 | of this name. */ | |
20082 | VEC (offset_type) *cu_indices; | |
20083 | }; | |
20084 | ||
20085 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
20086 | struct mapped_symtab | |
20087 | { | |
20088 | offset_type n_elements; | |
20089 | offset_type size; | |
20090 | struct symtab_index_entry **data; | |
20091 | }; | |
20092 | ||
20093 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 20094 | |
9291a0cd TT |
20095 | static hashval_t |
20096 | hash_symtab_entry (const void *e) | |
20097 | { | |
20098 | const struct symtab_index_entry *entry = e; | |
20099 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
20100 | sizeof (offset_type) * VEC_length (offset_type, | |
20101 | entry->cu_indices), | |
20102 | 0); | |
20103 | } | |
20104 | ||
20105 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 20106 | |
9291a0cd TT |
20107 | static int |
20108 | eq_symtab_entry (const void *a, const void *b) | |
20109 | { | |
20110 | const struct symtab_index_entry *ea = a; | |
20111 | const struct symtab_index_entry *eb = b; | |
20112 | int len = VEC_length (offset_type, ea->cu_indices); | |
20113 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
20114 | return 0; | |
20115 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
20116 | VEC_address (offset_type, eb->cu_indices), | |
20117 | sizeof (offset_type) * len); | |
20118 | } | |
20119 | ||
20120 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 20121 | |
9291a0cd TT |
20122 | static void |
20123 | delete_symtab_entry (void *p) | |
20124 | { | |
20125 | struct symtab_index_entry *entry = p; | |
20126 | VEC_free (offset_type, entry->cu_indices); | |
20127 | xfree (entry); | |
20128 | } | |
20129 | ||
20130 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 20131 | |
9291a0cd | 20132 | static htab_t |
3876f04e | 20133 | create_symbol_hash_table (void) |
9291a0cd TT |
20134 | { |
20135 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
20136 | delete_symtab_entry, xcalloc, xfree); | |
20137 | } | |
20138 | ||
20139 | /* Create a new mapped symtab object. */ | |
b89be57b | 20140 | |
9291a0cd TT |
20141 | static struct mapped_symtab * |
20142 | create_mapped_symtab (void) | |
20143 | { | |
20144 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
20145 | symtab->n_elements = 0; | |
20146 | symtab->size = 1024; | |
20147 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
20148 | return symtab; | |
20149 | } | |
20150 | ||
20151 | /* Destroy a mapped_symtab. */ | |
b89be57b | 20152 | |
9291a0cd TT |
20153 | static void |
20154 | cleanup_mapped_symtab (void *p) | |
20155 | { | |
20156 | struct mapped_symtab *symtab = p; | |
20157 | /* The contents of the array are freed when the other hash table is | |
20158 | destroyed. */ | |
20159 | xfree (symtab->data); | |
20160 | xfree (symtab); | |
20161 | } | |
20162 | ||
20163 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
20164 | the slot. |
20165 | ||
20166 | Function is used only during write_hash_table so no index format backward | |
20167 | compatibility is needed. */ | |
b89be57b | 20168 | |
9291a0cd TT |
20169 | static struct symtab_index_entry ** |
20170 | find_slot (struct mapped_symtab *symtab, const char *name) | |
20171 | { | |
559a7a62 | 20172 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
20173 | |
20174 | index = hash & (symtab->size - 1); | |
20175 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
20176 | ||
20177 | for (;;) | |
20178 | { | |
20179 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
20180 | return &symtab->data[index]; | |
20181 | index = (index + step) & (symtab->size - 1); | |
20182 | } | |
20183 | } | |
20184 | ||
20185 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 20186 | |
9291a0cd TT |
20187 | static void |
20188 | hash_expand (struct mapped_symtab *symtab) | |
20189 | { | |
20190 | offset_type old_size = symtab->size; | |
20191 | offset_type i; | |
20192 | struct symtab_index_entry **old_entries = symtab->data; | |
20193 | ||
20194 | symtab->size *= 2; | |
20195 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
20196 | ||
20197 | for (i = 0; i < old_size; ++i) | |
20198 | { | |
20199 | if (old_entries[i]) | |
20200 | { | |
20201 | struct symtab_index_entry **slot = find_slot (symtab, | |
20202 | old_entries[i]->name); | |
20203 | *slot = old_entries[i]; | |
20204 | } | |
20205 | } | |
20206 | ||
20207 | xfree (old_entries); | |
20208 | } | |
20209 | ||
156942c7 DE |
20210 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
20211 | CU_INDEX is the index of the CU in which the symbol appears. | |
20212 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 20213 | |
9291a0cd TT |
20214 | static void |
20215 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 20216 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
20217 | offset_type cu_index) |
20218 | { | |
20219 | struct symtab_index_entry **slot; | |
156942c7 | 20220 | offset_type cu_index_and_attrs; |
9291a0cd TT |
20221 | |
20222 | ++symtab->n_elements; | |
20223 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
20224 | hash_expand (symtab); | |
20225 | ||
20226 | slot = find_slot (symtab, name); | |
20227 | if (!*slot) | |
20228 | { | |
20229 | *slot = XNEW (struct symtab_index_entry); | |
20230 | (*slot)->name = name; | |
156942c7 | 20231 | /* index_offset is set later. */ |
9291a0cd TT |
20232 | (*slot)->cu_indices = NULL; |
20233 | } | |
156942c7 DE |
20234 | |
20235 | cu_index_and_attrs = 0; | |
20236 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
20237 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
20238 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
20239 | ||
20240 | /* We don't want to record an index value twice as we want to avoid the | |
20241 | duplication. | |
20242 | We process all global symbols and then all static symbols | |
20243 | (which would allow us to avoid the duplication by only having to check | |
20244 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
20245 | To keep things simple we don't worry about the duplication here and | |
20246 | sort and uniqufy the list after we've processed all symbols. */ | |
20247 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
20248 | } | |
20249 | ||
20250 | /* qsort helper routine for uniquify_cu_indices. */ | |
20251 | ||
20252 | static int | |
20253 | offset_type_compare (const void *ap, const void *bp) | |
20254 | { | |
20255 | offset_type a = *(offset_type *) ap; | |
20256 | offset_type b = *(offset_type *) bp; | |
20257 | ||
20258 | return (a > b) - (b > a); | |
20259 | } | |
20260 | ||
20261 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
20262 | ||
20263 | static void | |
20264 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
20265 | { | |
20266 | int i; | |
20267 | ||
20268 | for (i = 0; i < symtab->size; ++i) | |
20269 | { | |
20270 | struct symtab_index_entry *entry = symtab->data[i]; | |
20271 | ||
20272 | if (entry | |
20273 | && entry->cu_indices != NULL) | |
20274 | { | |
20275 | unsigned int next_to_insert, next_to_check; | |
20276 | offset_type last_value; | |
20277 | ||
20278 | qsort (VEC_address (offset_type, entry->cu_indices), | |
20279 | VEC_length (offset_type, entry->cu_indices), | |
20280 | sizeof (offset_type), offset_type_compare); | |
20281 | ||
20282 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
20283 | next_to_insert = 1; | |
20284 | for (next_to_check = 1; | |
20285 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
20286 | ++next_to_check) | |
20287 | { | |
20288 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
20289 | != last_value) | |
20290 | { | |
20291 | last_value = VEC_index (offset_type, entry->cu_indices, | |
20292 | next_to_check); | |
20293 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
20294 | last_value); | |
20295 | ++next_to_insert; | |
20296 | } | |
20297 | } | |
20298 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
20299 | } | |
20300 | } | |
9291a0cd TT |
20301 | } |
20302 | ||
20303 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 20304 | |
9291a0cd | 20305 | static offset_type |
3876f04e | 20306 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
20307 | struct symtab_index_entry *entry) |
20308 | { | |
20309 | void **slot; | |
20310 | ||
3876f04e | 20311 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
20312 | if (!*slot) |
20313 | { | |
20314 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
20315 | offset_type val = MAYBE_SWAP (len); | |
20316 | offset_type iter; | |
20317 | int i; | |
20318 | ||
20319 | *slot = entry; | |
20320 | entry->index_offset = obstack_object_size (cpool); | |
20321 | ||
20322 | obstack_grow (cpool, &val, sizeof (val)); | |
20323 | for (i = 0; | |
20324 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
20325 | ++i) | |
20326 | { | |
20327 | val = MAYBE_SWAP (iter); | |
20328 | obstack_grow (cpool, &val, sizeof (val)); | |
20329 | } | |
20330 | } | |
20331 | else | |
20332 | { | |
20333 | struct symtab_index_entry *old_entry = *slot; | |
20334 | entry->index_offset = old_entry->index_offset; | |
20335 | entry = old_entry; | |
20336 | } | |
20337 | return entry->index_offset; | |
20338 | } | |
20339 | ||
20340 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
20341 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 20342 | |
9291a0cd TT |
20343 | static void |
20344 | write_hash_table (struct mapped_symtab *symtab, | |
20345 | struct obstack *output, struct obstack *cpool) | |
20346 | { | |
20347 | offset_type i; | |
3876f04e | 20348 | htab_t symbol_hash_table; |
9291a0cd TT |
20349 | htab_t str_table; |
20350 | ||
3876f04e | 20351 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 20352 | str_table = create_strtab (); |
3876f04e | 20353 | |
9291a0cd TT |
20354 | /* We add all the index vectors to the constant pool first, to |
20355 | ensure alignment is ok. */ | |
20356 | for (i = 0; i < symtab->size; ++i) | |
20357 | { | |
20358 | if (symtab->data[i]) | |
3876f04e | 20359 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
20360 | } |
20361 | ||
20362 | /* Now write out the hash table. */ | |
20363 | for (i = 0; i < symtab->size; ++i) | |
20364 | { | |
20365 | offset_type str_off, vec_off; | |
20366 | ||
20367 | if (symtab->data[i]) | |
20368 | { | |
20369 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
20370 | vec_off = symtab->data[i]->index_offset; | |
20371 | } | |
20372 | else | |
20373 | { | |
20374 | /* While 0 is a valid constant pool index, it is not valid | |
20375 | to have 0 for both offsets. */ | |
20376 | str_off = 0; | |
20377 | vec_off = 0; | |
20378 | } | |
20379 | ||
20380 | str_off = MAYBE_SWAP (str_off); | |
20381 | vec_off = MAYBE_SWAP (vec_off); | |
20382 | ||
20383 | obstack_grow (output, &str_off, sizeof (str_off)); | |
20384 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
20385 | } | |
20386 | ||
20387 | htab_delete (str_table); | |
3876f04e | 20388 | htab_delete (symbol_hash_table); |
9291a0cd TT |
20389 | } |
20390 | ||
0a5429f6 DE |
20391 | /* Struct to map psymtab to CU index in the index file. */ |
20392 | struct psymtab_cu_index_map | |
20393 | { | |
20394 | struct partial_symtab *psymtab; | |
20395 | unsigned int cu_index; | |
20396 | }; | |
20397 | ||
20398 | static hashval_t | |
20399 | hash_psymtab_cu_index (const void *item) | |
20400 | { | |
20401 | const struct psymtab_cu_index_map *map = item; | |
20402 | ||
20403 | return htab_hash_pointer (map->psymtab); | |
20404 | } | |
20405 | ||
20406 | static int | |
20407 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
20408 | { | |
20409 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
20410 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
20411 | ||
20412 | return lhs->psymtab == rhs->psymtab; | |
20413 | } | |
20414 | ||
20415 | /* Helper struct for building the address table. */ | |
20416 | struct addrmap_index_data | |
20417 | { | |
20418 | struct objfile *objfile; | |
20419 | struct obstack *addr_obstack; | |
20420 | htab_t cu_index_htab; | |
20421 | ||
20422 | /* Non-zero if the previous_* fields are valid. | |
20423 | We can't write an entry until we see the next entry (since it is only then | |
20424 | that we know the end of the entry). */ | |
20425 | int previous_valid; | |
20426 | /* Index of the CU in the table of all CUs in the index file. */ | |
20427 | unsigned int previous_cu_index; | |
0963b4bd | 20428 | /* Start address of the CU. */ |
0a5429f6 DE |
20429 | CORE_ADDR previous_cu_start; |
20430 | }; | |
20431 | ||
20432 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 20433 | |
9291a0cd | 20434 | static void |
0a5429f6 DE |
20435 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
20436 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 20437 | { |
0a5429f6 | 20438 | offset_type cu_index_to_write; |
948f8e3d | 20439 | gdb_byte addr[8]; |
9291a0cd TT |
20440 | CORE_ADDR baseaddr; |
20441 | ||
20442 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
20443 | ||
0a5429f6 DE |
20444 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
20445 | obstack_grow (obstack, addr, 8); | |
20446 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
20447 | obstack_grow (obstack, addr, 8); | |
20448 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
20449 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
20450 | } | |
20451 | ||
20452 | /* Worker function for traversing an addrmap to build the address table. */ | |
20453 | ||
20454 | static int | |
20455 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
20456 | { | |
20457 | struct addrmap_index_data *data = datap; | |
20458 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
20459 | |
20460 | if (data->previous_valid) | |
20461 | add_address_entry (data->objfile, data->addr_obstack, | |
20462 | data->previous_cu_start, start_addr, | |
20463 | data->previous_cu_index); | |
20464 | ||
20465 | data->previous_cu_start = start_addr; | |
20466 | if (pst != NULL) | |
20467 | { | |
20468 | struct psymtab_cu_index_map find_map, *map; | |
20469 | find_map.psymtab = pst; | |
20470 | map = htab_find (data->cu_index_htab, &find_map); | |
20471 | gdb_assert (map != NULL); | |
20472 | data->previous_cu_index = map->cu_index; | |
20473 | data->previous_valid = 1; | |
20474 | } | |
20475 | else | |
20476 | data->previous_valid = 0; | |
20477 | ||
20478 | return 0; | |
20479 | } | |
20480 | ||
20481 | /* Write OBJFILE's address map to OBSTACK. | |
20482 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
20483 | in the index file. */ | |
20484 | ||
20485 | static void | |
20486 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
20487 | htab_t cu_index_htab) | |
20488 | { | |
20489 | struct addrmap_index_data addrmap_index_data; | |
20490 | ||
20491 | /* When writing the address table, we have to cope with the fact that | |
20492 | the addrmap iterator only provides the start of a region; we have to | |
20493 | wait until the next invocation to get the start of the next region. */ | |
20494 | ||
20495 | addrmap_index_data.objfile = objfile; | |
20496 | addrmap_index_data.addr_obstack = obstack; | |
20497 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
20498 | addrmap_index_data.previous_valid = 0; | |
20499 | ||
20500 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
20501 | &addrmap_index_data); | |
20502 | ||
20503 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
20504 | is valid, but we should still handle it. | |
20505 | The end address is recorded as the start of the next region, but that | |
20506 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
20507 | anyway. */ | |
20508 | if (addrmap_index_data.previous_valid) | |
20509 | add_address_entry (objfile, obstack, | |
20510 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
20511 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
20512 | } |
20513 | ||
156942c7 DE |
20514 | /* Return the symbol kind of PSYM. */ |
20515 | ||
20516 | static gdb_index_symbol_kind | |
20517 | symbol_kind (struct partial_symbol *psym) | |
20518 | { | |
20519 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
20520 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
20521 | ||
20522 | switch (domain) | |
20523 | { | |
20524 | case VAR_DOMAIN: | |
20525 | switch (aclass) | |
20526 | { | |
20527 | case LOC_BLOCK: | |
20528 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
20529 | case LOC_TYPEDEF: | |
20530 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20531 | case LOC_COMPUTED: | |
20532 | case LOC_CONST_BYTES: | |
20533 | case LOC_OPTIMIZED_OUT: | |
20534 | case LOC_STATIC: | |
20535 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20536 | case LOC_CONST: | |
20537 | /* Note: It's currently impossible to recognize psyms as enum values | |
20538 | short of reading the type info. For now punt. */ | |
20539 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20540 | default: | |
20541 | /* There are other LOC_FOO values that one might want to classify | |
20542 | as variables, but dwarf2read.c doesn't currently use them. */ | |
20543 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20544 | } | |
20545 | case STRUCT_DOMAIN: | |
20546 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20547 | default: | |
20548 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20549 | } | |
20550 | } | |
20551 | ||
9291a0cd | 20552 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 20553 | |
9291a0cd TT |
20554 | static void |
20555 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 20556 | htab_t psyms_seen, |
9291a0cd TT |
20557 | struct partial_symbol **psymp, |
20558 | int count, | |
987d643c TT |
20559 | offset_type cu_index, |
20560 | int is_static) | |
9291a0cd TT |
20561 | { |
20562 | for (; count-- > 0; ++psymp) | |
20563 | { | |
156942c7 DE |
20564 | struct partial_symbol *psym = *psymp; |
20565 | void **slot; | |
987d643c | 20566 | |
156942c7 | 20567 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 20568 | error (_("Ada is not currently supported by the index")); |
987d643c | 20569 | |
987d643c | 20570 | /* Only add a given psymbol once. */ |
156942c7 | 20571 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
20572 | if (!*slot) |
20573 | { | |
156942c7 DE |
20574 | gdb_index_symbol_kind kind = symbol_kind (psym); |
20575 | ||
20576 | *slot = psym; | |
20577 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
20578 | is_static, kind, cu_index); | |
987d643c | 20579 | } |
9291a0cd TT |
20580 | } |
20581 | } | |
20582 | ||
20583 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
20584 | exception if there is an error. */ | |
b89be57b | 20585 | |
9291a0cd TT |
20586 | static void |
20587 | write_obstack (FILE *file, struct obstack *obstack) | |
20588 | { | |
20589 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
20590 | file) | |
20591 | != obstack_object_size (obstack)) | |
20592 | error (_("couldn't data write to file")); | |
20593 | } | |
20594 | ||
20595 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 20596 | |
9291a0cd TT |
20597 | static void |
20598 | unlink_if_set (void *p) | |
20599 | { | |
20600 | char **filename = p; | |
20601 | if (*filename) | |
20602 | unlink (*filename); | |
20603 | } | |
20604 | ||
1fd400ff TT |
20605 | /* A helper struct used when iterating over debug_types. */ |
20606 | struct signatured_type_index_data | |
20607 | { | |
20608 | struct objfile *objfile; | |
20609 | struct mapped_symtab *symtab; | |
20610 | struct obstack *types_list; | |
987d643c | 20611 | htab_t psyms_seen; |
1fd400ff TT |
20612 | int cu_index; |
20613 | }; | |
20614 | ||
20615 | /* A helper function that writes a single signatured_type to an | |
20616 | obstack. */ | |
b89be57b | 20617 | |
1fd400ff TT |
20618 | static int |
20619 | write_one_signatured_type (void **slot, void *d) | |
20620 | { | |
20621 | struct signatured_type_index_data *info = d; | |
20622 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
0186c6a7 | 20623 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
20624 | gdb_byte val[8]; |
20625 | ||
20626 | write_psymbols (info->symtab, | |
987d643c | 20627 | info->psyms_seen, |
3e43a32a MS |
20628 | info->objfile->global_psymbols.list |
20629 | + psymtab->globals_offset, | |
987d643c TT |
20630 | psymtab->n_global_syms, info->cu_index, |
20631 | 0); | |
1fd400ff | 20632 | write_psymbols (info->symtab, |
987d643c | 20633 | info->psyms_seen, |
3e43a32a MS |
20634 | info->objfile->static_psymbols.list |
20635 | + psymtab->statics_offset, | |
987d643c TT |
20636 | psymtab->n_static_syms, info->cu_index, |
20637 | 1); | |
1fd400ff | 20638 | |
b64f50a1 JK |
20639 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20640 | entry->per_cu.offset.sect_off); | |
1fd400ff | 20641 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
20642 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20643 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
20644 | obstack_grow (info->types_list, val, 8); |
20645 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
20646 | obstack_grow (info->types_list, val, 8); | |
20647 | ||
20648 | ++info->cu_index; | |
20649 | ||
20650 | return 1; | |
20651 | } | |
20652 | ||
95554aad TT |
20653 | /* Recurse into all "included" dependencies and write their symbols as |
20654 | if they appeared in this psymtab. */ | |
20655 | ||
20656 | static void | |
20657 | recursively_write_psymbols (struct objfile *objfile, | |
20658 | struct partial_symtab *psymtab, | |
20659 | struct mapped_symtab *symtab, | |
20660 | htab_t psyms_seen, | |
20661 | offset_type cu_index) | |
20662 | { | |
20663 | int i; | |
20664 | ||
20665 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
20666 | if (psymtab->dependencies[i]->user != NULL) | |
20667 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
20668 | symtab, psyms_seen, cu_index); | |
20669 | ||
20670 | write_psymbols (symtab, | |
20671 | psyms_seen, | |
20672 | objfile->global_psymbols.list + psymtab->globals_offset, | |
20673 | psymtab->n_global_syms, cu_index, | |
20674 | 0); | |
20675 | write_psymbols (symtab, | |
20676 | psyms_seen, | |
20677 | objfile->static_psymbols.list + psymtab->statics_offset, | |
20678 | psymtab->n_static_syms, cu_index, | |
20679 | 1); | |
20680 | } | |
20681 | ||
9291a0cd | 20682 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 20683 | |
9291a0cd TT |
20684 | static void |
20685 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
20686 | { | |
20687 | struct cleanup *cleanup; | |
20688 | char *filename, *cleanup_filename; | |
1fd400ff TT |
20689 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
20690 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
20691 | int i; |
20692 | FILE *out_file; | |
20693 | struct mapped_symtab *symtab; | |
20694 | offset_type val, size_of_contents, total_len; | |
20695 | struct stat st; | |
987d643c | 20696 | htab_t psyms_seen; |
0a5429f6 DE |
20697 | htab_t cu_index_htab; |
20698 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 20699 | |
b4f2f049 | 20700 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
9291a0cd | 20701 | return; |
b4f2f049 | 20702 | |
9291a0cd TT |
20703 | if (dwarf2_per_objfile->using_index) |
20704 | error (_("Cannot use an index to create the index")); | |
20705 | ||
8b70b953 TT |
20706 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
20707 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
20708 | ||
9291a0cd | 20709 | if (stat (objfile->name, &st) < 0) |
7e17e088 | 20710 | perror_with_name (objfile->name); |
9291a0cd TT |
20711 | |
20712 | filename = concat (dir, SLASH_STRING, lbasename (objfile->name), | |
20713 | INDEX_SUFFIX, (char *) NULL); | |
20714 | cleanup = make_cleanup (xfree, filename); | |
20715 | ||
614c279d | 20716 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
20717 | if (!out_file) |
20718 | error (_("Can't open `%s' for writing"), filename); | |
20719 | ||
20720 | cleanup_filename = filename; | |
20721 | make_cleanup (unlink_if_set, &cleanup_filename); | |
20722 | ||
20723 | symtab = create_mapped_symtab (); | |
20724 | make_cleanup (cleanup_mapped_symtab, symtab); | |
20725 | ||
20726 | obstack_init (&addr_obstack); | |
20727 | make_cleanup_obstack_free (&addr_obstack); | |
20728 | ||
20729 | obstack_init (&cu_list); | |
20730 | make_cleanup_obstack_free (&cu_list); | |
20731 | ||
1fd400ff TT |
20732 | obstack_init (&types_cu_list); |
20733 | make_cleanup_obstack_free (&types_cu_list); | |
20734 | ||
987d643c TT |
20735 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
20736 | NULL, xcalloc, xfree); | |
96408a79 | 20737 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 20738 | |
0a5429f6 DE |
20739 | /* While we're scanning CU's create a table that maps a psymtab pointer |
20740 | (which is what addrmap records) to its index (which is what is recorded | |
20741 | in the index file). This will later be needed to write the address | |
20742 | table. */ | |
20743 | cu_index_htab = htab_create_alloc (100, | |
20744 | hash_psymtab_cu_index, | |
20745 | eq_psymtab_cu_index, | |
20746 | NULL, xcalloc, xfree); | |
96408a79 | 20747 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
20748 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
20749 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
20750 | * dwarf2_per_objfile->n_comp_units); | |
20751 | make_cleanup (xfree, psymtab_cu_index_map); | |
20752 | ||
20753 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
20754 | work here. Also, the debug_types entries do not appear in |
20755 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
20756 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
20757 | { | |
3e43a32a MS |
20758 | struct dwarf2_per_cu_data *per_cu |
20759 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 20760 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 20761 | gdb_byte val[8]; |
0a5429f6 DE |
20762 | struct psymtab_cu_index_map *map; |
20763 | void **slot; | |
9291a0cd | 20764 | |
95554aad TT |
20765 | if (psymtab->user == NULL) |
20766 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 20767 | |
0a5429f6 DE |
20768 | map = &psymtab_cu_index_map[i]; |
20769 | map->psymtab = psymtab; | |
20770 | map->cu_index = i; | |
20771 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
20772 | gdb_assert (slot != NULL); | |
20773 | gdb_assert (*slot == NULL); | |
20774 | *slot = map; | |
9291a0cd | 20775 | |
b64f50a1 JK |
20776 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20777 | per_cu->offset.sect_off); | |
9291a0cd | 20778 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 20779 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
20780 | obstack_grow (&cu_list, val, 8); |
20781 | } | |
20782 | ||
0a5429f6 DE |
20783 | /* Dump the address map. */ |
20784 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
20785 | ||
1fd400ff TT |
20786 | /* Write out the .debug_type entries, if any. */ |
20787 | if (dwarf2_per_objfile->signatured_types) | |
20788 | { | |
20789 | struct signatured_type_index_data sig_data; | |
20790 | ||
20791 | sig_data.objfile = objfile; | |
20792 | sig_data.symtab = symtab; | |
20793 | sig_data.types_list = &types_cu_list; | |
987d643c | 20794 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
20795 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
20796 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
20797 | write_one_signatured_type, &sig_data); | |
20798 | } | |
20799 | ||
156942c7 DE |
20800 | /* Now that we've processed all symbols we can shrink their cu_indices |
20801 | lists. */ | |
20802 | uniquify_cu_indices (symtab); | |
20803 | ||
9291a0cd TT |
20804 | obstack_init (&constant_pool); |
20805 | make_cleanup_obstack_free (&constant_pool); | |
20806 | obstack_init (&symtab_obstack); | |
20807 | make_cleanup_obstack_free (&symtab_obstack); | |
20808 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
20809 | ||
20810 | obstack_init (&contents); | |
20811 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 20812 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
20813 | total_len = size_of_contents; |
20814 | ||
20815 | /* The version number. */ | |
796a7ff8 | 20816 | val = MAYBE_SWAP (8); |
9291a0cd TT |
20817 | obstack_grow (&contents, &val, sizeof (val)); |
20818 | ||
20819 | /* The offset of the CU list from the start of the file. */ | |
20820 | val = MAYBE_SWAP (total_len); | |
20821 | obstack_grow (&contents, &val, sizeof (val)); | |
20822 | total_len += obstack_object_size (&cu_list); | |
20823 | ||
1fd400ff TT |
20824 | /* The offset of the types CU list from the start of the file. */ |
20825 | val = MAYBE_SWAP (total_len); | |
20826 | obstack_grow (&contents, &val, sizeof (val)); | |
20827 | total_len += obstack_object_size (&types_cu_list); | |
20828 | ||
9291a0cd TT |
20829 | /* The offset of the address table from the start of the file. */ |
20830 | val = MAYBE_SWAP (total_len); | |
20831 | obstack_grow (&contents, &val, sizeof (val)); | |
20832 | total_len += obstack_object_size (&addr_obstack); | |
20833 | ||
20834 | /* The offset of the symbol table from the start of the file. */ | |
20835 | val = MAYBE_SWAP (total_len); | |
20836 | obstack_grow (&contents, &val, sizeof (val)); | |
20837 | total_len += obstack_object_size (&symtab_obstack); | |
20838 | ||
20839 | /* The offset of the constant pool from the start of the file. */ | |
20840 | val = MAYBE_SWAP (total_len); | |
20841 | obstack_grow (&contents, &val, sizeof (val)); | |
20842 | total_len += obstack_object_size (&constant_pool); | |
20843 | ||
20844 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
20845 | ||
20846 | write_obstack (out_file, &contents); | |
20847 | write_obstack (out_file, &cu_list); | |
1fd400ff | 20848 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
20849 | write_obstack (out_file, &addr_obstack); |
20850 | write_obstack (out_file, &symtab_obstack); | |
20851 | write_obstack (out_file, &constant_pool); | |
20852 | ||
20853 | fclose (out_file); | |
20854 | ||
20855 | /* We want to keep the file, so we set cleanup_filename to NULL | |
20856 | here. See unlink_if_set. */ | |
20857 | cleanup_filename = NULL; | |
20858 | ||
20859 | do_cleanups (cleanup); | |
20860 | } | |
20861 | ||
90476074 TT |
20862 | /* Implementation of the `save gdb-index' command. |
20863 | ||
20864 | Note that the file format used by this command is documented in the | |
20865 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 20866 | |
9291a0cd TT |
20867 | static void |
20868 | save_gdb_index_command (char *arg, int from_tty) | |
20869 | { | |
20870 | struct objfile *objfile; | |
20871 | ||
20872 | if (!arg || !*arg) | |
96d19272 | 20873 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
20874 | |
20875 | ALL_OBJFILES (objfile) | |
20876 | { | |
20877 | struct stat st; | |
20878 | ||
20879 | /* If the objfile does not correspond to an actual file, skip it. */ | |
20880 | if (stat (objfile->name, &st) < 0) | |
20881 | continue; | |
20882 | ||
20883 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
20884 | if (dwarf2_per_objfile) | |
20885 | { | |
20886 | volatile struct gdb_exception except; | |
20887 | ||
20888 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
20889 | { | |
20890 | write_psymtabs_to_index (objfile, arg); | |
20891 | } | |
20892 | if (except.reason < 0) | |
20893 | exception_fprintf (gdb_stderr, except, | |
20894 | _("Error while writing index for `%s': "), | |
20895 | objfile->name); | |
20896 | } | |
20897 | } | |
dce234bc PP |
20898 | } |
20899 | ||
9291a0cd TT |
20900 | \f |
20901 | ||
9eae7c52 TT |
20902 | int dwarf2_always_disassemble; |
20903 | ||
20904 | static void | |
20905 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
20906 | struct cmd_list_element *c, const char *value) | |
20907 | { | |
3e43a32a MS |
20908 | fprintf_filtered (file, |
20909 | _("Whether to always disassemble " | |
20910 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
20911 | value); |
20912 | } | |
20913 | ||
900e11f9 JK |
20914 | static void |
20915 | show_check_physname (struct ui_file *file, int from_tty, | |
20916 | struct cmd_list_element *c, const char *value) | |
20917 | { | |
20918 | fprintf_filtered (file, | |
20919 | _("Whether to check \"physname\" is %s.\n"), | |
20920 | value); | |
20921 | } | |
20922 | ||
6502dd73 DJ |
20923 | void _initialize_dwarf2_read (void); |
20924 | ||
20925 | void | |
20926 | _initialize_dwarf2_read (void) | |
20927 | { | |
96d19272 JK |
20928 | struct cmd_list_element *c; |
20929 | ||
dce234bc | 20930 | dwarf2_objfile_data_key |
c1bd65d0 | 20931 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 20932 | |
1bedd215 AC |
20933 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
20934 | Set DWARF 2 specific variables.\n\ | |
20935 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20936 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
20937 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
20938 | ||
1bedd215 AC |
20939 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
20940 | Show DWARF 2 specific variables\n\ | |
20941 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20942 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
20943 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
20944 | ||
20945 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
20946 | &dwarf2_max_cache_age, _("\ |
20947 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20948 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20949 | A higher limit means that cached compilation units will be stored\n\ | |
20950 | in memory longer, and more total memory will be used. Zero disables\n\ | |
20951 | caching, which can slow down startup."), | |
2c5b56ce | 20952 | NULL, |
920d2a44 | 20953 | show_dwarf2_max_cache_age, |
2c5b56ce | 20954 | &set_dwarf2_cmdlist, |
ae038cb0 | 20955 | &show_dwarf2_cmdlist); |
d97bc12b | 20956 | |
9eae7c52 TT |
20957 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
20958 | &dwarf2_always_disassemble, _("\ | |
20959 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
20960 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
20961 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
20962 | syntax. When disabled, expressions will be printed in a more\n\ | |
20963 | conversational style, when possible."), | |
20964 | NULL, | |
20965 | show_dwarf2_always_disassemble, | |
20966 | &set_dwarf2_cmdlist, | |
20967 | &show_dwarf2_cmdlist); | |
20968 | ||
45cfd468 DE |
20969 | add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
20970 | Set debugging of the dwarf2 reader."), _("\ | |
20971 | Show debugging of the dwarf2 reader."), _("\ | |
20972 | When enabled, debugging messages are printed during dwarf2 reading\n\ | |
20973 | and symtab expansion."), | |
20974 | NULL, | |
20975 | NULL, | |
20976 | &setdebuglist, &showdebuglist); | |
20977 | ||
ccce17b0 | 20978 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
20979 | Set debugging of the dwarf2 DIE reader."), _("\ |
20980 | Show debugging of the dwarf2 DIE reader."), _("\ | |
20981 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
20982 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
20983 | NULL, |
20984 | NULL, | |
20985 | &setdebuglist, &showdebuglist); | |
9291a0cd | 20986 | |
900e11f9 JK |
20987 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
20988 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
20989 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
20990 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
20991 | the demangler."), | |
20992 | NULL, show_check_physname, | |
20993 | &setdebuglist, &showdebuglist); | |
20994 | ||
e615022a DE |
20995 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
20996 | no_class, &use_deprecated_index_sections, _("\ | |
20997 | Set whether to use deprecated gdb_index sections."), _("\ | |
20998 | Show whether to use deprecated gdb_index sections."), _("\ | |
20999 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
21000 | Normally they are ignored either because of a missing feature or\n\ | |
21001 | performance issue.\n\ | |
21002 | Warning: This option must be enabled before gdb reads the file."), | |
21003 | NULL, | |
21004 | NULL, | |
21005 | &setlist, &showlist); | |
21006 | ||
96d19272 | 21007 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 21008 | _("\ |
fc1a9d6e | 21009 | Save a gdb-index file.\n\ |
11570e71 | 21010 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
21011 | &save_cmdlist); |
21012 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
21013 | |
21014 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
21015 | &dwarf2_locexpr_funcs); | |
21016 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
21017 | &dwarf2_loclist_funcs); | |
21018 | ||
21019 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
21020 | &dwarf2_block_frame_base_locexpr_funcs); | |
21021 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
21022 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 21023 | } |