Commit | Line | Data |
---|---|---|
c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
0b302171 | 3 | Copyright (C) 1994-2012 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" |
4c2df51b | 70 | |
c906108c SS |
71 | #include <fcntl.h> |
72 | #include "gdb_string.h" | |
4bdf3d34 | 73 | #include "gdb_assert.h" |
c906108c | 74 | #include <sys/types.h> |
d8151005 | 75 | |
34eaf542 TT |
76 | typedef struct symbol *symbolp; |
77 | DEF_VEC_P (symbolp); | |
78 | ||
45cfd468 DE |
79 | /* When non-zero, print basic high level tracing messages. |
80 | This is in contrast to the low level DIE reading of dwarf2_die_debug. */ | |
81 | static int dwarf2_read_debug = 0; | |
82 | ||
d97bc12b | 83 | /* When non-zero, dump DIEs after they are read in. */ |
ccce17b0 | 84 | static unsigned int dwarf2_die_debug = 0; |
d97bc12b | 85 | |
900e11f9 JK |
86 | /* When non-zero, cross-check physname against demangler. */ |
87 | static int check_physname = 0; | |
88 | ||
481860b3 | 89 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 90 | static int use_deprecated_index_sections = 0; |
481860b3 | 91 | |
df8a16a1 DJ |
92 | /* When set, the file that we're processing is known to have debugging |
93 | info for C++ namespaces. GCC 3.3.x did not produce this information, | |
94 | but later versions do. */ | |
95 | ||
96 | static int processing_has_namespace_info; | |
97 | ||
6502dd73 DJ |
98 | static const struct objfile_data *dwarf2_objfile_data_key; |
99 | ||
dce234bc PP |
100 | struct dwarf2_section_info |
101 | { | |
102 | asection *asection; | |
103 | gdb_byte *buffer; | |
104 | bfd_size_type size; | |
be391dca TT |
105 | /* True if we have tried to read this section. */ |
106 | int readin; | |
dce234bc PP |
107 | }; |
108 | ||
8b70b953 TT |
109 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
110 | DEF_VEC_O (dwarf2_section_info_def); | |
111 | ||
9291a0cd TT |
112 | /* All offsets in the index are of this type. It must be |
113 | architecture-independent. */ | |
114 | typedef uint32_t offset_type; | |
115 | ||
116 | DEF_VEC_I (offset_type); | |
117 | ||
156942c7 DE |
118 | /* Ensure only legit values are used. */ |
119 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
120 | do { \ | |
121 | gdb_assert ((unsigned int) (value) <= 1); \ | |
122 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
123 | } while (0) | |
124 | ||
125 | /* Ensure only legit values are used. */ | |
126 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
127 | do { \ | |
128 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
129 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
130 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
131 | } while (0) | |
132 | ||
133 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
134 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
135 | do { \ | |
136 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
137 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
138 | } while (0) | |
139 | ||
9291a0cd TT |
140 | /* A description of the mapped index. The file format is described in |
141 | a comment by the code that writes the index. */ | |
142 | struct mapped_index | |
143 | { | |
559a7a62 JK |
144 | /* Index data format version. */ |
145 | int version; | |
146 | ||
9291a0cd TT |
147 | /* The total length of the buffer. */ |
148 | off_t total_size; | |
b11b1f88 | 149 | |
9291a0cd TT |
150 | /* A pointer to the address table data. */ |
151 | const gdb_byte *address_table; | |
b11b1f88 | 152 | |
9291a0cd TT |
153 | /* Size of the address table data in bytes. */ |
154 | offset_type address_table_size; | |
b11b1f88 | 155 | |
3876f04e DE |
156 | /* The symbol table, implemented as a hash table. */ |
157 | const offset_type *symbol_table; | |
b11b1f88 | 158 | |
9291a0cd | 159 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 160 | offset_type symbol_table_slots; |
b11b1f88 | 161 | |
9291a0cd TT |
162 | /* A pointer to the constant pool. */ |
163 | const char *constant_pool; | |
164 | }; | |
165 | ||
95554aad TT |
166 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
167 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
168 | ||
9cdd5dbd DE |
169 | /* Collection of data recorded per objfile. |
170 | This hangs off of dwarf2_objfile_data_key. */ | |
171 | ||
6502dd73 DJ |
172 | struct dwarf2_per_objfile |
173 | { | |
dce234bc PP |
174 | struct dwarf2_section_info info; |
175 | struct dwarf2_section_info abbrev; | |
176 | struct dwarf2_section_info line; | |
dce234bc PP |
177 | struct dwarf2_section_info loc; |
178 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 179 | struct dwarf2_section_info macro; |
dce234bc PP |
180 | struct dwarf2_section_info str; |
181 | struct dwarf2_section_info ranges; | |
3019eac3 | 182 | struct dwarf2_section_info addr; |
dce234bc PP |
183 | struct dwarf2_section_info frame; |
184 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 185 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 186 | |
8b70b953 TT |
187 | VEC (dwarf2_section_info_def) *types; |
188 | ||
be391dca TT |
189 | /* Back link. */ |
190 | struct objfile *objfile; | |
191 | ||
d467dd73 | 192 | /* Table of all the compilation units. This is used to locate |
10b3939b | 193 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
194 | struct dwarf2_per_cu_data **all_comp_units; |
195 | ||
196 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
197 | int n_comp_units; | |
198 | ||
1fd400ff | 199 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 200 | int n_type_units; |
1fd400ff | 201 | |
d467dd73 | 202 | /* The .debug_types-related CUs (TUs). */ |
b4dd5633 | 203 | struct signatured_type **all_type_units; |
1fd400ff | 204 | |
f4dc4d17 DE |
205 | /* The number of entries in all_type_unit_groups. */ |
206 | int n_type_unit_groups; | |
207 | ||
208 | /* Table of type unit groups. | |
209 | This exists to make it easy to iterate over all CUs and TU groups. */ | |
210 | struct type_unit_group **all_type_unit_groups; | |
211 | ||
212 | /* Table of struct type_unit_group objects. | |
213 | The hash key is the DW_AT_stmt_list value. */ | |
214 | htab_t type_unit_groups; | |
72dca2f5 | 215 | |
348e048f DE |
216 | /* A table mapping .debug_types signatures to its signatured_type entry. |
217 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
218 | htab_t signatured_types; | |
219 | ||
f4dc4d17 DE |
220 | /* Type unit statistics, to see how well the scaling improvements |
221 | are doing. */ | |
222 | struct tu_stats | |
223 | { | |
224 | int nr_uniq_abbrev_tables; | |
225 | int nr_symtabs; | |
226 | int nr_symtab_sharers; | |
227 | int nr_stmt_less_type_units; | |
228 | } tu_stats; | |
229 | ||
230 | /* A chain of compilation units that are currently read in, so that | |
231 | they can be freed later. */ | |
232 | struct dwarf2_per_cu_data *read_in_chain; | |
233 | ||
3019eac3 DE |
234 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
235 | This is NULL if the table hasn't been allocated yet. */ | |
236 | htab_t dwo_files; | |
237 | ||
80626a55 DE |
238 | /* Non-zero if we've check for whether there is a DWP file. */ |
239 | int dwp_checked; | |
240 | ||
241 | /* The DWP file if there is one, or NULL. */ | |
242 | struct dwp_file *dwp_file; | |
243 | ||
36586728 TT |
244 | /* The shared '.dwz' file, if one exists. This is used when the |
245 | original data was compressed using 'dwz -m'. */ | |
246 | struct dwz_file *dwz_file; | |
247 | ||
72dca2f5 FR |
248 | /* A flag indicating wether this objfile has a section loaded at a |
249 | VMA of 0. */ | |
250 | int has_section_at_zero; | |
9291a0cd | 251 | |
ae2de4f8 DE |
252 | /* True if we are using the mapped index, |
253 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
254 | unsigned char using_index; |
255 | ||
ae2de4f8 | 256 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 257 | struct mapped_index *index_table; |
98bfdba5 | 258 | |
7b9f3c50 | 259 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
260 | TUs typically share line table entries with a CU, so we maintain a |
261 | separate table of all line table entries to support the sharing. | |
262 | Note that while there can be way more TUs than CUs, we've already | |
263 | sorted all the TUs into "type unit groups", grouped by their | |
264 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
265 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
266 | htab_t quick_file_names_table; |
267 | ||
98bfdba5 PA |
268 | /* Set during partial symbol reading, to prevent queueing of full |
269 | symbols. */ | |
270 | int reading_partial_symbols; | |
673bfd45 | 271 | |
dee91e82 | 272 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 273 | This is NULL if not allocated yet. |
dee91e82 DE |
274 | The mapping is done via (CU/TU signature + DIE offset) -> type. */ |
275 | htab_t die_type_hash; | |
95554aad TT |
276 | |
277 | /* The CUs we recently read. */ | |
278 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
279 | }; |
280 | ||
281 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 282 | |
251d32d9 | 283 | /* Default names of the debugging sections. */ |
c906108c | 284 | |
233a11ab CS |
285 | /* Note that if the debugging section has been compressed, it might |
286 | have a name like .zdebug_info. */ | |
287 | ||
9cdd5dbd DE |
288 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
289 | { | |
251d32d9 TG |
290 | { ".debug_info", ".zdebug_info" }, |
291 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
292 | { ".debug_line", ".zdebug_line" }, | |
293 | { ".debug_loc", ".zdebug_loc" }, | |
294 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 295 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
296 | { ".debug_str", ".zdebug_str" }, |
297 | { ".debug_ranges", ".zdebug_ranges" }, | |
298 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 299 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
300 | { ".debug_frame", ".zdebug_frame" }, |
301 | { ".eh_frame", NULL }, | |
24d3216f TT |
302 | { ".gdb_index", ".zgdb_index" }, |
303 | 23 | |
251d32d9 | 304 | }; |
c906108c | 305 | |
80626a55 | 306 | /* List of DWO/DWP sections. */ |
3019eac3 | 307 | |
80626a55 | 308 | static const struct dwop_section_names |
3019eac3 DE |
309 | { |
310 | struct dwarf2_section_names abbrev_dwo; | |
311 | struct dwarf2_section_names info_dwo; | |
312 | struct dwarf2_section_names line_dwo; | |
313 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
314 | struct dwarf2_section_names macinfo_dwo; |
315 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
316 | struct dwarf2_section_names str_dwo; |
317 | struct dwarf2_section_names str_offsets_dwo; | |
318 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
319 | struct dwarf2_section_names cu_index; |
320 | struct dwarf2_section_names tu_index; | |
3019eac3 | 321 | } |
80626a55 | 322 | dwop_section_names = |
3019eac3 DE |
323 | { |
324 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
325 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
326 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
327 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
328 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
329 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
330 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
331 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
332 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
333 | { ".debug_cu_index", ".zdebug_cu_index" }, |
334 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
335 | }; |
336 | ||
c906108c SS |
337 | /* local data types */ |
338 | ||
107d2387 AC |
339 | /* The data in a compilation unit header, after target2host |
340 | translation, looks like this. */ | |
c906108c | 341 | struct comp_unit_head |
a738430d | 342 | { |
c764a876 | 343 | unsigned int length; |
a738430d | 344 | short version; |
a738430d MK |
345 | unsigned char addr_size; |
346 | unsigned char signed_addr_p; | |
b64f50a1 | 347 | sect_offset abbrev_offset; |
57349743 | 348 | |
a738430d MK |
349 | /* Size of file offsets; either 4 or 8. */ |
350 | unsigned int offset_size; | |
57349743 | 351 | |
a738430d MK |
352 | /* Size of the length field; either 4 or 12. */ |
353 | unsigned int initial_length_size; | |
57349743 | 354 | |
a738430d MK |
355 | /* Offset to the first byte of this compilation unit header in the |
356 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 357 | sect_offset offset; |
57349743 | 358 | |
d00adf39 DE |
359 | /* Offset to first die in this cu from the start of the cu. |
360 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 361 | cu_offset first_die_offset; |
a738430d | 362 | }; |
c906108c | 363 | |
3da10d80 KS |
364 | /* Type used for delaying computation of method physnames. |
365 | See comments for compute_delayed_physnames. */ | |
366 | struct delayed_method_info | |
367 | { | |
368 | /* The type to which the method is attached, i.e., its parent class. */ | |
369 | struct type *type; | |
370 | ||
371 | /* The index of the method in the type's function fieldlists. */ | |
372 | int fnfield_index; | |
373 | ||
374 | /* The index of the method in the fieldlist. */ | |
375 | int index; | |
376 | ||
377 | /* The name of the DIE. */ | |
378 | const char *name; | |
379 | ||
380 | /* The DIE associated with this method. */ | |
381 | struct die_info *die; | |
382 | }; | |
383 | ||
384 | typedef struct delayed_method_info delayed_method_info; | |
385 | DEF_VEC_O (delayed_method_info); | |
386 | ||
e7c27a73 DJ |
387 | /* Internal state when decoding a particular compilation unit. */ |
388 | struct dwarf2_cu | |
389 | { | |
390 | /* The objfile containing this compilation unit. */ | |
391 | struct objfile *objfile; | |
392 | ||
d00adf39 | 393 | /* The header of the compilation unit. */ |
e7c27a73 | 394 | struct comp_unit_head header; |
e142c38c | 395 | |
d00adf39 DE |
396 | /* Base address of this compilation unit. */ |
397 | CORE_ADDR base_address; | |
398 | ||
399 | /* Non-zero if base_address has been set. */ | |
400 | int base_known; | |
401 | ||
e142c38c DJ |
402 | /* The language we are debugging. */ |
403 | enum language language; | |
404 | const struct language_defn *language_defn; | |
405 | ||
b0f35d58 DL |
406 | const char *producer; |
407 | ||
e142c38c DJ |
408 | /* The generic symbol table building routines have separate lists for |
409 | file scope symbols and all all other scopes (local scopes). So | |
410 | we need to select the right one to pass to add_symbol_to_list(). | |
411 | We do it by keeping a pointer to the correct list in list_in_scope. | |
412 | ||
413 | FIXME: The original dwarf code just treated the file scope as the | |
414 | first local scope, and all other local scopes as nested local | |
415 | scopes, and worked fine. Check to see if we really need to | |
416 | distinguish these in buildsym.c. */ | |
417 | struct pending **list_in_scope; | |
418 | ||
433df2d4 DE |
419 | /* The abbrev table for this CU. |
420 | Normally this points to the abbrev table in the objfile. | |
421 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
422 | struct abbrev_table *abbrev_table; | |
72bf9492 | 423 | |
b64f50a1 JK |
424 | /* Hash table holding all the loaded partial DIEs |
425 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
426 | htab_t partial_dies; |
427 | ||
428 | /* Storage for things with the same lifetime as this read-in compilation | |
429 | unit, including partial DIEs. */ | |
430 | struct obstack comp_unit_obstack; | |
431 | ||
ae038cb0 DJ |
432 | /* When multiple dwarf2_cu structures are living in memory, this field |
433 | chains them all together, so that they can be released efficiently. | |
434 | We will probably also want a generation counter so that most-recently-used | |
435 | compilation units are cached... */ | |
436 | struct dwarf2_per_cu_data *read_in_chain; | |
437 | ||
438 | /* Backchain to our per_cu entry if the tree has been built. */ | |
439 | struct dwarf2_per_cu_data *per_cu; | |
440 | ||
441 | /* How many compilation units ago was this CU last referenced? */ | |
442 | int last_used; | |
443 | ||
b64f50a1 JK |
444 | /* A hash table of DIE cu_offset for following references with |
445 | die_info->offset.sect_off as hash. */ | |
51545339 | 446 | htab_t die_hash; |
10b3939b DJ |
447 | |
448 | /* Full DIEs if read in. */ | |
449 | struct die_info *dies; | |
450 | ||
451 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
452 | units referenced by this one. Only set during full symbol processing; | |
453 | partial symbol tables do not have dependencies. */ | |
454 | htab_t dependencies; | |
455 | ||
cb1df416 DJ |
456 | /* Header data from the line table, during full symbol processing. */ |
457 | struct line_header *line_header; | |
458 | ||
3da10d80 KS |
459 | /* A list of methods which need to have physnames computed |
460 | after all type information has been read. */ | |
461 | VEC (delayed_method_info) *method_list; | |
462 | ||
96408a79 SA |
463 | /* To be copied to symtab->call_site_htab. */ |
464 | htab_t call_site_htab; | |
465 | ||
034e5797 DE |
466 | /* Non-NULL if this CU came from a DWO file. |
467 | There is an invariant here that is important to remember: | |
468 | Except for attributes copied from the top level DIE in the "main" | |
469 | (or "stub") file in preparation for reading the DWO file | |
470 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
471 | Either there isn't a DWO file (in which case this is NULL and the point | |
472 | is moot), or there is and either we're not going to read it (in which | |
473 | case this is NULL) or there is and we are reading it (in which case this | |
474 | is non-NULL). */ | |
3019eac3 DE |
475 | struct dwo_unit *dwo_unit; |
476 | ||
477 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
478 | (zero is a valid value though). | |
479 | Note this value comes from the stub CU/TU's DIE. */ | |
480 | ULONGEST addr_base; | |
481 | ||
2e3cf129 DE |
482 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
483 | (zero is a valid value though). | |
484 | Note this value comes from the stub CU/TU's DIE. | |
485 | Also note that the value is zero in the non-DWO case so this value can | |
ab435259 DE |
486 | be used without needing to know whether DWO files are in use or not. |
487 | N.B. This does not apply to DW_AT_ranges appearing in | |
488 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
489 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
490 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
491 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
492 | ULONGEST ranges_base; |
493 | ||
ae038cb0 DJ |
494 | /* Mark used when releasing cached dies. */ |
495 | unsigned int mark : 1; | |
496 | ||
8be455d7 JK |
497 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
498 | This test is imperfect as there may exist optimized debug code not using | |
499 | any location list and still facing inlining issues if handled as | |
500 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 501 | unsigned int has_loclist : 1; |
ba919b58 | 502 | |
1b80a9fa JK |
503 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
504 | if all the producer_is_* fields are valid. This information is cached | |
505 | because profiling CU expansion showed excessive time spent in | |
506 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
507 | unsigned int checked_producer : 1; |
508 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 509 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 510 | unsigned int producer_is_icc : 1; |
e7c27a73 DJ |
511 | }; |
512 | ||
10b3939b DJ |
513 | /* Persistent data held for a compilation unit, even when not |
514 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 515 | read_symtab_private field of the psymtab. */ |
10b3939b | 516 | |
ae038cb0 DJ |
517 | struct dwarf2_per_cu_data |
518 | { | |
36586728 | 519 | /* The start offset and length of this compilation unit. |
45452591 | 520 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
521 | initial_length_size. |
522 | If the DIE refers to a DWO file, this is always of the original die, | |
523 | not the DWO file. */ | |
b64f50a1 | 524 | sect_offset offset; |
36586728 | 525 | unsigned int length; |
ae038cb0 DJ |
526 | |
527 | /* Flag indicating this compilation unit will be read in before | |
528 | any of the current compilation units are processed. */ | |
c764a876 | 529 | unsigned int queued : 1; |
ae038cb0 | 530 | |
0d99eb77 DE |
531 | /* This flag will be set when reading partial DIEs if we need to load |
532 | absolutely all DIEs for this compilation unit, instead of just the ones | |
533 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
534 | hash table and don't find it. */ |
535 | unsigned int load_all_dies : 1; | |
536 | ||
3019eac3 DE |
537 | /* Non-zero if this CU is from .debug_types. */ |
538 | unsigned int is_debug_types : 1; | |
539 | ||
36586728 TT |
540 | /* Non-zero if this CU is from the .dwz file. */ |
541 | unsigned int is_dwz : 1; | |
542 | ||
3019eac3 DE |
543 | /* The section this CU/TU lives in. |
544 | If the DIE refers to a DWO file, this is always the original die, | |
545 | not the DWO file. */ | |
546 | struct dwarf2_section_info *info_or_types_section; | |
348e048f | 547 | |
17ea53c3 JK |
548 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
549 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 550 | struct dwarf2_cu *cu; |
1c379e20 | 551 | |
9cdd5dbd DE |
552 | /* The corresponding objfile. |
553 | Normally we can get the objfile from dwarf2_per_objfile. | |
554 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
555 | struct objfile *objfile; |
556 | ||
557 | /* When using partial symbol tables, the 'psymtab' field is active. | |
558 | Otherwise the 'quick' field is active. */ | |
559 | union | |
560 | { | |
561 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 562 | or NULL for unread partial units. */ |
9291a0cd TT |
563 | struct partial_symtab *psymtab; |
564 | ||
565 | /* Data needed by the "quick" functions. */ | |
566 | struct dwarf2_per_cu_quick_data *quick; | |
567 | } v; | |
95554aad | 568 | |
f4dc4d17 DE |
569 | union |
570 | { | |
571 | /* The CUs we import using DW_TAG_imported_unit. This is filled in | |
572 | while reading psymtabs, used to compute the psymtab dependencies, | |
573 | and then cleared. Then it is filled in again while reading full | |
574 | symbols, and only deleted when the objfile is destroyed. */ | |
575 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; | |
576 | ||
577 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
578 | can share them. If this is a TU, this points to the containing | |
579 | symtab. */ | |
580 | struct type_unit_group *type_unit_group; | |
581 | } s; | |
ae038cb0 DJ |
582 | }; |
583 | ||
348e048f DE |
584 | /* Entry in the signatured_types hash table. */ |
585 | ||
586 | struct signatured_type | |
587 | { | |
42e7ad6c DE |
588 | /* The "per_cu" object of this type. |
589 | N.B.: This is the first member so that it's easy to convert pointers | |
590 | between them. */ | |
591 | struct dwarf2_per_cu_data per_cu; | |
592 | ||
3019eac3 | 593 | /* The type's signature. */ |
348e048f DE |
594 | ULONGEST signature; |
595 | ||
3019eac3 DE |
596 | /* Offset in the TU of the type's DIE, as read from the TU header. |
597 | If the definition lives in a DWO file, this value is unusable. */ | |
598 | cu_offset type_offset_in_tu; | |
599 | ||
600 | /* Offset in the section of the type's DIE. | |
601 | If the definition lives in a DWO file, this is the offset in the | |
602 | .debug_types.dwo section. | |
603 | The value is zero until the actual value is known. | |
604 | Zero is otherwise not a valid section offset. */ | |
605 | sect_offset type_offset_in_section; | |
348e048f DE |
606 | }; |
607 | ||
094b34ac DE |
608 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
609 | This includes type_unit_group and quick_file_names. */ | |
610 | ||
611 | struct stmt_list_hash | |
612 | { | |
613 | /* The DWO unit this table is from or NULL if there is none. */ | |
614 | struct dwo_unit *dwo_unit; | |
615 | ||
616 | /* Offset in .debug_line or .debug_line.dwo. */ | |
617 | sect_offset line_offset; | |
618 | }; | |
619 | ||
f4dc4d17 DE |
620 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
621 | an object of this type. */ | |
622 | ||
623 | struct type_unit_group | |
624 | { | |
625 | /* dwarf2read.c's main "handle" on the symtab. | |
626 | To simplify things we create an artificial CU that "includes" all the | |
627 | type units using this stmt_list so that the rest of the code still has | |
628 | a "per_cu" handle on the symtab. | |
629 | This PER_CU is recognized by having no section. */ | |
630 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL) | |
094b34ac DE |
631 | struct dwarf2_per_cu_data per_cu; |
632 | ||
633 | union | |
634 | { | |
635 | /* The TUs that share this DW_AT_stmt_list entry. | |
636 | This is added to while parsing type units to build partial symtabs, | |
637 | and is deleted afterwards and not used again. */ | |
638 | VEC (dwarf2_per_cu_ptr) *tus; | |
f4dc4d17 | 639 | |
094b34ac DE |
640 | /* When reading the line table in "quick" functions, we need a real TU. |
641 | Any will do, we know they all share the same DW_AT_stmt_list entry. | |
642 | For simplicity's sake, we pick the first one. */ | |
643 | struct dwarf2_per_cu_data *first_tu; | |
644 | } t; | |
f4dc4d17 DE |
645 | |
646 | /* The primary symtab. | |
094b34ac DE |
647 | Type units in a group needn't all be defined in the same source file, |
648 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
649 | struct symtab *primary_symtab; |
650 | ||
094b34ac DE |
651 | /* The data used to construct the hash key. */ |
652 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
653 | |
654 | /* The number of symtabs from the line header. | |
655 | The value here must match line_header.num_file_names. */ | |
656 | unsigned int num_symtabs; | |
657 | ||
658 | /* The symbol tables for this TU (obtained from the files listed in | |
659 | DW_AT_stmt_list). | |
660 | WARNING: The order of entries here must match the order of entries | |
661 | in the line header. After the first TU using this type_unit_group, the | |
662 | line header for the subsequent TUs is recreated from this. This is done | |
663 | because we need to use the same symtabs for each TU using the same | |
664 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
665 | there's no guarantee the line header doesn't have duplicate entries. */ | |
666 | struct symtab **symtabs; | |
667 | }; | |
668 | ||
80626a55 | 669 | /* These sections are what may appear in a DWO file. */ |
3019eac3 DE |
670 | |
671 | struct dwo_sections | |
672 | { | |
673 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
674 | struct dwarf2_section_info line; |
675 | struct dwarf2_section_info loc; | |
09262596 DE |
676 | struct dwarf2_section_info macinfo; |
677 | struct dwarf2_section_info macro; | |
3019eac3 DE |
678 | struct dwarf2_section_info str; |
679 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
680 | /* In the case of a virtual DWO file, these two are unused. */ |
681 | struct dwarf2_section_info info; | |
3019eac3 DE |
682 | VEC (dwarf2_section_info_def) *types; |
683 | }; | |
684 | ||
685 | /* Common bits of DWO CUs/TUs. */ | |
686 | ||
687 | struct dwo_unit | |
688 | { | |
689 | /* Backlink to the containing struct dwo_file. */ | |
690 | struct dwo_file *dwo_file; | |
691 | ||
692 | /* The "id" that distinguishes this CU/TU. | |
693 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
694 | Since signatures came first, we stick with it for consistency. */ | |
695 | ULONGEST signature; | |
696 | ||
697 | /* The section this CU/TU lives in, in the DWO file. */ | |
698 | struct dwarf2_section_info *info_or_types_section; | |
699 | ||
700 | /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */ | |
701 | sect_offset offset; | |
702 | unsigned int length; | |
703 | ||
704 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
705 | cu_offset type_offset_in_tu; | |
706 | }; | |
707 | ||
80626a55 DE |
708 | /* Data for one DWO file. |
709 | This includes virtual DWO files that have been packaged into a | |
710 | DWP file. */ | |
3019eac3 DE |
711 | |
712 | struct dwo_file | |
713 | { | |
80626a55 DE |
714 | /* The DW_AT_GNU_dwo_name attribute. This is the hash key. |
715 | For virtual DWO files the name is constructed from the section offsets | |
716 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
717 | from related CU+TUs. */ | |
718 | const char *name; | |
3019eac3 | 719 | |
80626a55 DE |
720 | /* The bfd, when the file is open. Otherwise this is NULL. |
721 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
722 | bfd *dbfd; | |
3019eac3 DE |
723 | |
724 | /* Section info for this file. */ | |
725 | struct dwo_sections sections; | |
726 | ||
727 | /* Table of CUs in the file. | |
728 | Each element is a struct dwo_unit. */ | |
729 | htab_t cus; | |
730 | ||
731 | /* Table of TUs in the file. | |
732 | Each element is a struct dwo_unit. */ | |
733 | htab_t tus; | |
734 | }; | |
735 | ||
80626a55 DE |
736 | /* These sections are what may appear in a DWP file. */ |
737 | ||
738 | struct dwp_sections | |
739 | { | |
740 | struct dwarf2_section_info str; | |
741 | struct dwarf2_section_info cu_index; | |
742 | struct dwarf2_section_info tu_index; | |
743 | /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced | |
744 | by section number. We don't need to record them here. */ | |
745 | }; | |
746 | ||
747 | /* These sections are what may appear in a virtual DWO file. */ | |
748 | ||
749 | struct virtual_dwo_sections | |
750 | { | |
751 | struct dwarf2_section_info abbrev; | |
752 | struct dwarf2_section_info line; | |
753 | struct dwarf2_section_info loc; | |
754 | struct dwarf2_section_info macinfo; | |
755 | struct dwarf2_section_info macro; | |
756 | struct dwarf2_section_info str_offsets; | |
757 | /* Each DWP hash table entry records one CU or one TU. | |
758 | That is recorded here, and copied to dwo_unit.info_or_types_section. */ | |
759 | struct dwarf2_section_info info_or_types; | |
760 | }; | |
761 | ||
762 | /* Contents of DWP hash tables. */ | |
763 | ||
764 | struct dwp_hash_table | |
765 | { | |
766 | uint32_t nr_units, nr_slots; | |
767 | const gdb_byte *hash_table, *unit_table, *section_pool; | |
768 | }; | |
769 | ||
770 | /* Data for one DWP file. */ | |
771 | ||
772 | struct dwp_file | |
773 | { | |
774 | /* Name of the file. */ | |
775 | const char *name; | |
776 | ||
777 | /* The bfd, when the file is open. Otherwise this is NULL. */ | |
778 | bfd *dbfd; | |
779 | ||
780 | /* Section info for this file. */ | |
781 | struct dwp_sections sections; | |
782 | ||
783 | /* Table of CUs in the file. */ | |
784 | const struct dwp_hash_table *cus; | |
785 | ||
786 | /* Table of TUs in the file. */ | |
787 | const struct dwp_hash_table *tus; | |
788 | ||
789 | /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ | |
790 | htab_t loaded_cutus; | |
791 | ||
792 | /* Table to map ELF section numbers to their sections. */ | |
793 | unsigned int num_sections; | |
794 | asection **elf_sections; | |
795 | }; | |
796 | ||
36586728 TT |
797 | /* This represents a '.dwz' file. */ |
798 | ||
799 | struct dwz_file | |
800 | { | |
801 | /* A dwz file can only contain a few sections. */ | |
802 | struct dwarf2_section_info abbrev; | |
803 | struct dwarf2_section_info info; | |
804 | struct dwarf2_section_info str; | |
805 | struct dwarf2_section_info line; | |
806 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 807 | struct dwarf2_section_info gdb_index; |
36586728 TT |
808 | |
809 | /* The dwz's BFD. */ | |
810 | bfd *dwz_bfd; | |
811 | }; | |
812 | ||
0963b4bd MS |
813 | /* Struct used to pass misc. parameters to read_die_and_children, et |
814 | al. which are used for both .debug_info and .debug_types dies. | |
815 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 816 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
817 | |
818 | struct die_reader_specs | |
819 | { | |
dee91e82 | 820 | /* die_section->asection->owner. */ |
93311388 DE |
821 | bfd* abfd; |
822 | ||
823 | /* The CU of the DIE we are parsing. */ | |
824 | struct dwarf2_cu *cu; | |
825 | ||
80626a55 | 826 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
827 | struct dwo_file *dwo_file; |
828 | ||
dee91e82 | 829 | /* The section the die comes from. |
3019eac3 | 830 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
831 | struct dwarf2_section_info *die_section; |
832 | ||
833 | /* die_section->buffer. */ | |
834 | gdb_byte *buffer; | |
f664829e DE |
835 | |
836 | /* The end of the buffer. */ | |
837 | const gdb_byte *buffer_end; | |
93311388 DE |
838 | }; |
839 | ||
fd820528 | 840 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 DE |
841 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
842 | gdb_byte *info_ptr, | |
843 | struct die_info *comp_unit_die, | |
844 | int has_children, | |
845 | void *data); | |
846 | ||
debd256d JB |
847 | /* The line number information for a compilation unit (found in the |
848 | .debug_line section) begins with a "statement program header", | |
849 | which contains the following information. */ | |
850 | struct line_header | |
851 | { | |
852 | unsigned int total_length; | |
853 | unsigned short version; | |
854 | unsigned int header_length; | |
855 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 856 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
857 | unsigned char default_is_stmt; |
858 | int line_base; | |
859 | unsigned char line_range; | |
860 | unsigned char opcode_base; | |
861 | ||
862 | /* standard_opcode_lengths[i] is the number of operands for the | |
863 | standard opcode whose value is i. This means that | |
864 | standard_opcode_lengths[0] is unused, and the last meaningful | |
865 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
866 | unsigned char *standard_opcode_lengths; | |
867 | ||
868 | /* The include_directories table. NOTE! These strings are not | |
869 | allocated with xmalloc; instead, they are pointers into | |
870 | debug_line_buffer. If you try to free them, `free' will get | |
871 | indigestion. */ | |
872 | unsigned int num_include_dirs, include_dirs_size; | |
873 | char **include_dirs; | |
874 | ||
875 | /* The file_names table. NOTE! These strings are not allocated | |
876 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
877 | Don't try to free them directly. */ | |
878 | unsigned int num_file_names, file_names_size; | |
879 | struct file_entry | |
c906108c | 880 | { |
debd256d JB |
881 | char *name; |
882 | unsigned int dir_index; | |
883 | unsigned int mod_time; | |
884 | unsigned int length; | |
aaa75496 | 885 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 886 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
887 | } *file_names; |
888 | ||
889 | /* The start and end of the statement program following this | |
6502dd73 | 890 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fe1b8b76 | 891 | gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 892 | }; |
c906108c SS |
893 | |
894 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 895 | need this much information. */ |
c906108c SS |
896 | struct partial_die_info |
897 | { | |
72bf9492 | 898 | /* Offset of this DIE. */ |
b64f50a1 | 899 | sect_offset offset; |
72bf9492 DJ |
900 | |
901 | /* DWARF-2 tag for this DIE. */ | |
902 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
903 | ||
72bf9492 DJ |
904 | /* Assorted flags describing the data found in this DIE. */ |
905 | unsigned int has_children : 1; | |
906 | unsigned int is_external : 1; | |
907 | unsigned int is_declaration : 1; | |
908 | unsigned int has_type : 1; | |
909 | unsigned int has_specification : 1; | |
910 | unsigned int has_pc_info : 1; | |
481860b3 | 911 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
912 | |
913 | /* Flag set if the SCOPE field of this structure has been | |
914 | computed. */ | |
915 | unsigned int scope_set : 1; | |
916 | ||
fa4028e9 JB |
917 | /* Flag set if the DIE has a byte_size attribute. */ |
918 | unsigned int has_byte_size : 1; | |
919 | ||
98bfdba5 PA |
920 | /* Flag set if any of the DIE's children are template arguments. */ |
921 | unsigned int has_template_arguments : 1; | |
922 | ||
abc72ce4 DE |
923 | /* Flag set if fixup_partial_die has been called on this die. */ |
924 | unsigned int fixup_called : 1; | |
925 | ||
36586728 TT |
926 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
927 | unsigned int is_dwz : 1; | |
928 | ||
929 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
930 | unsigned int spec_is_dwz : 1; | |
931 | ||
72bf9492 | 932 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 933 | sometimes a default name for unnamed DIEs. */ |
c906108c | 934 | char *name; |
72bf9492 | 935 | |
abc72ce4 DE |
936 | /* The linkage name, if present. */ |
937 | const char *linkage_name; | |
938 | ||
72bf9492 DJ |
939 | /* The scope to prepend to our children. This is generally |
940 | allocated on the comp_unit_obstack, so will disappear | |
941 | when this compilation unit leaves the cache. */ | |
942 | char *scope; | |
943 | ||
95554aad TT |
944 | /* Some data associated with the partial DIE. The tag determines |
945 | which field is live. */ | |
946 | union | |
947 | { | |
948 | /* The location description associated with this DIE, if any. */ | |
949 | struct dwarf_block *locdesc; | |
950 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
951 | sect_offset offset; | |
952 | } d; | |
72bf9492 DJ |
953 | |
954 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
955 | CORE_ADDR lowpc; |
956 | CORE_ADDR highpc; | |
72bf9492 | 957 | |
93311388 | 958 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 959 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
960 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
961 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
fe1b8b76 | 962 | gdb_byte *sibling; |
72bf9492 DJ |
963 | |
964 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
965 | DW_AT_specification (or DW_AT_abstract_origin or | |
966 | DW_AT_extension). */ | |
b64f50a1 | 967 | sect_offset spec_offset; |
72bf9492 DJ |
968 | |
969 | /* Pointers to this DIE's parent, first child, and next sibling, | |
970 | if any. */ | |
971 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
972 | }; |
973 | ||
0963b4bd | 974 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
975 | struct abbrev_info |
976 | { | |
977 | unsigned int number; /* number identifying abbrev */ | |
978 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
979 | unsigned short has_children; /* boolean */ |
980 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
981 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
982 | struct abbrev_info *next; /* next in chain */ | |
983 | }; | |
984 | ||
985 | struct attr_abbrev | |
986 | { | |
9d25dd43 DE |
987 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
988 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
989 | }; |
990 | ||
433df2d4 DE |
991 | /* Size of abbrev_table.abbrev_hash_table. */ |
992 | #define ABBREV_HASH_SIZE 121 | |
993 | ||
994 | /* Top level data structure to contain an abbreviation table. */ | |
995 | ||
996 | struct abbrev_table | |
997 | { | |
f4dc4d17 DE |
998 | /* Where the abbrev table came from. |
999 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1000 | sect_offset offset; |
1001 | ||
1002 | /* Storage for the abbrev table. */ | |
1003 | struct obstack abbrev_obstack; | |
1004 | ||
1005 | /* Hash table of abbrevs. | |
1006 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1007 | It could be statically allocated, but the previous code didn't so we | |
1008 | don't either. */ | |
1009 | struct abbrev_info **abbrevs; | |
1010 | }; | |
1011 | ||
0963b4bd | 1012 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1013 | struct attribute |
1014 | { | |
9d25dd43 | 1015 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1016 | ENUM_BITFIELD(dwarf_form) form : 15; |
1017 | ||
1018 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1019 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1020 | here for better struct attribute alignment. */ | |
1021 | unsigned int string_is_canonical : 1; | |
1022 | ||
b60c80d6 DJ |
1023 | union |
1024 | { | |
1025 | char *str; | |
1026 | struct dwarf_block *blk; | |
43bbcdc2 PH |
1027 | ULONGEST unsnd; |
1028 | LONGEST snd; | |
b60c80d6 | 1029 | CORE_ADDR addr; |
348e048f | 1030 | struct signatured_type *signatured_type; |
b60c80d6 DJ |
1031 | } |
1032 | u; | |
1033 | }; | |
1034 | ||
0963b4bd | 1035 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1036 | struct die_info |
1037 | { | |
76815b17 DE |
1038 | /* DWARF-2 tag for this DIE. */ |
1039 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1040 | ||
1041 | /* Number of attributes */ | |
98bfdba5 PA |
1042 | unsigned char num_attrs; |
1043 | ||
1044 | /* True if we're presently building the full type name for the | |
1045 | type derived from this DIE. */ | |
1046 | unsigned char building_fullname : 1; | |
76815b17 DE |
1047 | |
1048 | /* Abbrev number */ | |
1049 | unsigned int abbrev; | |
1050 | ||
93311388 | 1051 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1052 | sect_offset offset; |
78ba4af6 JB |
1053 | |
1054 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1055 | points to this die's parent; CHILD points to the first child of | |
1056 | this node; and all the children of a given node are chained | |
4950bc1c | 1057 | together via their SIBLING fields. */ |
639d11d3 DC |
1058 | struct die_info *child; /* Its first child, if any. */ |
1059 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1060 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1061 | |
b60c80d6 DJ |
1062 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1063 | zero, but it's not common and zero-sized arrays are not | |
1064 | sufficiently portable C. */ | |
1065 | struct attribute attrs[1]; | |
c906108c SS |
1066 | }; |
1067 | ||
0963b4bd | 1068 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1069 | |
1070 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1071 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1072 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1073 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1074 | #define DW_SND(attr) ((attr)->u.snd) | |
1075 | #define DW_ADDR(attr) ((attr)->u.addr) | |
348e048f | 1076 | #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type) |
c906108c | 1077 | |
0963b4bd | 1078 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1079 | struct dwarf_block |
1080 | { | |
56eb65bd | 1081 | size_t size; |
1d6edc3c JK |
1082 | |
1083 | /* Valid only if SIZE is not zero. */ | |
fe1b8b76 | 1084 | gdb_byte *data; |
c906108c SS |
1085 | }; |
1086 | ||
c906108c SS |
1087 | #ifndef ATTR_ALLOC_CHUNK |
1088 | #define ATTR_ALLOC_CHUNK 4 | |
1089 | #endif | |
1090 | ||
c906108c SS |
1091 | /* Allocate fields for structs, unions and enums in this size. */ |
1092 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1093 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1094 | #endif | |
1095 | ||
c906108c SS |
1096 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1097 | but this would require a corresponding change in unpack_field_as_long | |
1098 | and friends. */ | |
1099 | static int bits_per_byte = 8; | |
1100 | ||
1101 | /* The routines that read and process dies for a C struct or C++ class | |
1102 | pass lists of data member fields and lists of member function fields | |
1103 | in an instance of a field_info structure, as defined below. */ | |
1104 | struct field_info | |
c5aa993b | 1105 | { |
0963b4bd | 1106 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1107 | struct nextfield |
1108 | { | |
1109 | struct nextfield *next; | |
1110 | int accessibility; | |
1111 | int virtuality; | |
1112 | struct field field; | |
1113 | } | |
7d0ccb61 | 1114 | *fields, *baseclasses; |
c906108c | 1115 | |
7d0ccb61 | 1116 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1117 | int nfields; |
c906108c | 1118 | |
c5aa993b JM |
1119 | /* Number of baseclasses. */ |
1120 | int nbaseclasses; | |
c906108c | 1121 | |
c5aa993b JM |
1122 | /* Set if the accesibility of one of the fields is not public. */ |
1123 | int non_public_fields; | |
c906108c | 1124 | |
c5aa993b JM |
1125 | /* Member function fields array, entries are allocated in the order they |
1126 | are encountered in the object file. */ | |
1127 | struct nextfnfield | |
1128 | { | |
1129 | struct nextfnfield *next; | |
1130 | struct fn_field fnfield; | |
1131 | } | |
1132 | *fnfields; | |
c906108c | 1133 | |
c5aa993b JM |
1134 | /* Member function fieldlist array, contains name of possibly overloaded |
1135 | member function, number of overloaded member functions and a pointer | |
1136 | to the head of the member function field chain. */ | |
1137 | struct fnfieldlist | |
1138 | { | |
1139 | char *name; | |
1140 | int length; | |
1141 | struct nextfnfield *head; | |
1142 | } | |
1143 | *fnfieldlists; | |
c906108c | 1144 | |
c5aa993b JM |
1145 | /* Number of entries in the fnfieldlists array. */ |
1146 | int nfnfields; | |
98751a41 JK |
1147 | |
1148 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1149 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1150 | struct typedef_field_list | |
1151 | { | |
1152 | struct typedef_field field; | |
1153 | struct typedef_field_list *next; | |
1154 | } | |
1155 | *typedef_field_list; | |
1156 | unsigned typedef_field_list_count; | |
c5aa993b | 1157 | }; |
c906108c | 1158 | |
10b3939b DJ |
1159 | /* One item on the queue of compilation units to read in full symbols |
1160 | for. */ | |
1161 | struct dwarf2_queue_item | |
1162 | { | |
1163 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1164 | enum language pretend_language; |
10b3939b DJ |
1165 | struct dwarf2_queue_item *next; |
1166 | }; | |
1167 | ||
1168 | /* The current queue. */ | |
1169 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1170 | ||
ae038cb0 DJ |
1171 | /* Loaded secondary compilation units are kept in memory until they |
1172 | have not been referenced for the processing of this many | |
1173 | compilation units. Set this to zero to disable caching. Cache | |
1174 | sizes of up to at least twenty will improve startup time for | |
1175 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1176 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1177 | static void |
1178 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1179 | struct cmd_list_element *c, const char *value) | |
1180 | { | |
3e43a32a MS |
1181 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1182 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1183 | value); |
1184 | } | |
1185 | ||
ae038cb0 | 1186 | |
0963b4bd | 1187 | /* Various complaints about symbol reading that don't abort the process. */ |
c906108c | 1188 | |
4d3c2250 KB |
1189 | static void |
1190 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2e276125 | 1191 | { |
4d3c2250 | 1192 | complaint (&symfile_complaints, |
e2e0b3e5 | 1193 | _("statement list doesn't fit in .debug_line section")); |
4d3c2250 KB |
1194 | } |
1195 | ||
25e43795 DJ |
1196 | static void |
1197 | dwarf2_debug_line_missing_file_complaint (void) | |
1198 | { | |
1199 | complaint (&symfile_complaints, | |
1200 | _(".debug_line section has line data without a file")); | |
1201 | } | |
1202 | ||
59205f5a JB |
1203 | static void |
1204 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1205 | { | |
1206 | complaint (&symfile_complaints, | |
3e43a32a MS |
1207 | _(".debug_line section has line " |
1208 | "program sequence without an end")); | |
59205f5a JB |
1209 | } |
1210 | ||
4d3c2250 KB |
1211 | static void |
1212 | dwarf2_complex_location_expr_complaint (void) | |
2e276125 | 1213 | { |
e2e0b3e5 | 1214 | complaint (&symfile_complaints, _("location expression too complex")); |
4d3c2250 KB |
1215 | } |
1216 | ||
4d3c2250 KB |
1217 | static void |
1218 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1219 | int arg3) | |
2e276125 | 1220 | { |
4d3c2250 | 1221 | complaint (&symfile_complaints, |
3e43a32a MS |
1222 | _("const value length mismatch for '%s', got %d, expected %d"), |
1223 | arg1, arg2, arg3); | |
4d3c2250 KB |
1224 | } |
1225 | ||
1226 | static void | |
f664829e | 1227 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) |
2e276125 | 1228 | { |
4d3c2250 | 1229 | complaint (&symfile_complaints, |
f664829e DE |
1230 | _("debug info runs off end of %s section" |
1231 | " [in module %s]"), | |
1232 | section->asection->name, | |
1233 | bfd_get_filename (section->asection->owner)); | |
4d3c2250 KB |
1234 | } |
1235 | ||
1236 | static void | |
1237 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
8e19ed76 | 1238 | { |
4d3c2250 | 1239 | complaint (&symfile_complaints, |
3e43a32a MS |
1240 | _("macro debug info contains a " |
1241 | "malformed macro definition:\n`%s'"), | |
4d3c2250 KB |
1242 | arg1); |
1243 | } | |
1244 | ||
1245 | static void | |
1246 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
8b2dbe47 | 1247 | { |
4d3c2250 | 1248 | complaint (&symfile_complaints, |
3e43a32a MS |
1249 | _("invalid attribute class or form for '%s' in '%s'"), |
1250 | arg1, arg2); | |
4d3c2250 | 1251 | } |
c906108c | 1252 | |
c906108c SS |
1253 | /* local function prototypes */ |
1254 | ||
4efb68b1 | 1255 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1256 | |
aaa75496 JB |
1257 | static void dwarf2_create_include_psymtab (char *, struct partial_symtab *, |
1258 | struct objfile *); | |
1259 | ||
918dd910 JK |
1260 | static void dwarf2_find_base_address (struct die_info *die, |
1261 | struct dwarf2_cu *cu); | |
1262 | ||
c67a9c90 | 1263 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1264 | |
72bf9492 DJ |
1265 | static void scan_partial_symbols (struct partial_die_info *, |
1266 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1267 | int, struct dwarf2_cu *); |
c906108c | 1268 | |
72bf9492 DJ |
1269 | static void add_partial_symbol (struct partial_die_info *, |
1270 | struct dwarf2_cu *); | |
63d06c5c | 1271 | |
72bf9492 DJ |
1272 | static void add_partial_namespace (struct partial_die_info *pdi, |
1273 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1274 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 1275 | |
5d7cb8df JK |
1276 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
1277 | CORE_ADDR *highpc, int need_pc, | |
1278 | struct dwarf2_cu *cu); | |
1279 | ||
72bf9492 DJ |
1280 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1281 | struct dwarf2_cu *cu); | |
91c24f0a | 1282 | |
bc30ff58 JB |
1283 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1284 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1285 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1286 | |
5c80ed9d TT |
1287 | static void dwarf2_psymtab_to_symtab (struct objfile *, |
1288 | struct partial_symtab *); | |
c906108c | 1289 | |
a14ed312 | 1290 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1291 | |
433df2d4 DE |
1292 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1293 | (const struct abbrev_table *, unsigned int); | |
1294 | ||
1295 | static struct abbrev_table *abbrev_table_read_table | |
1296 | (struct dwarf2_section_info *, sect_offset); | |
1297 | ||
1298 | static void abbrev_table_free (struct abbrev_table *); | |
1299 | ||
f4dc4d17 DE |
1300 | static void abbrev_table_free_cleanup (void *); |
1301 | ||
dee91e82 DE |
1302 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1303 | struct dwarf2_section_info *); | |
c906108c | 1304 | |
f3dd6933 | 1305 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1306 | |
6caca83c CC |
1307 | static unsigned int peek_abbrev_code (bfd *, gdb_byte *); |
1308 | ||
dee91e82 DE |
1309 | static struct partial_die_info *load_partial_dies |
1310 | (const struct die_reader_specs *, gdb_byte *, int); | |
72bf9492 | 1311 | |
dee91e82 DE |
1312 | static gdb_byte *read_partial_die (const struct die_reader_specs *, |
1313 | struct partial_die_info *, | |
1314 | struct abbrev_info *, | |
1315 | unsigned int, | |
1316 | gdb_byte *); | |
c906108c | 1317 | |
36586728 | 1318 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1319 | struct dwarf2_cu *); |
72bf9492 DJ |
1320 | |
1321 | static void fixup_partial_die (struct partial_die_info *, | |
1322 | struct dwarf2_cu *); | |
1323 | ||
dee91e82 DE |
1324 | static gdb_byte *read_attribute (const struct die_reader_specs *, |
1325 | struct attribute *, struct attr_abbrev *, | |
1326 | gdb_byte *); | |
a8329558 | 1327 | |
a1855c1d | 1328 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1329 | |
a1855c1d | 1330 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1331 | |
a1855c1d | 1332 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1333 | |
a1855c1d | 1334 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1335 | |
a1855c1d | 1336 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1337 | |
fe1b8b76 | 1338 | static CORE_ADDR read_address (bfd *, gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1339 | unsigned int *); |
c906108c | 1340 | |
c764a876 DE |
1341 | static LONGEST read_initial_length (bfd *, gdb_byte *, unsigned int *); |
1342 | ||
1343 | static LONGEST read_checked_initial_length_and_offset | |
1344 | (bfd *, gdb_byte *, const struct comp_unit_head *, | |
1345 | unsigned int *, unsigned int *); | |
613e1657 | 1346 | |
fe1b8b76 | 1347 | static LONGEST read_offset (bfd *, gdb_byte *, const struct comp_unit_head *, |
c764a876 DE |
1348 | unsigned int *); |
1349 | ||
1350 | static LONGEST read_offset_1 (bfd *, gdb_byte *, unsigned int); | |
613e1657 | 1351 | |
f4dc4d17 DE |
1352 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1353 | sect_offset); | |
1354 | ||
fe1b8b76 | 1355 | static gdb_byte *read_n_bytes (bfd *, gdb_byte *, unsigned int); |
c906108c | 1356 | |
9b1c24c8 | 1357 | static char *read_direct_string (bfd *, gdb_byte *, unsigned int *); |
c906108c | 1358 | |
fe1b8b76 JB |
1359 | static char *read_indirect_string (bfd *, gdb_byte *, |
1360 | const struct comp_unit_head *, | |
1361 | unsigned int *); | |
4bdf3d34 | 1362 | |
36586728 TT |
1363 | static char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
1364 | ||
12df843f | 1365 | static ULONGEST read_unsigned_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 1366 | |
12df843f | 1367 | static LONGEST read_signed_leb128 (bfd *, gdb_byte *, unsigned int *); |
c906108c | 1368 | |
3019eac3 DE |
1369 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, gdb_byte *, |
1370 | unsigned int *); | |
1371 | ||
1372 | static char *read_str_index (const struct die_reader_specs *reader, | |
1373 | struct dwarf2_cu *cu, ULONGEST str_index); | |
1374 | ||
e142c38c | 1375 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1376 | |
e142c38c DJ |
1377 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1378 | struct dwarf2_cu *); | |
c906108c | 1379 | |
348e048f | 1380 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1381 | unsigned int); |
348e048f | 1382 | |
05cf31d1 JB |
1383 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1384 | struct dwarf2_cu *cu); | |
1385 | ||
e142c38c | 1386 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1387 | |
e142c38c | 1388 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1389 | struct dwarf2_cu **); |
63d06c5c | 1390 | |
debd256d JB |
1391 | static void free_line_header (struct line_header *lh); |
1392 | ||
aaa75496 JB |
1393 | static void add_file_name (struct line_header *, char *, unsigned int, |
1394 | unsigned int, unsigned int); | |
1395 | ||
3019eac3 DE |
1396 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1397 | struct dwarf2_cu *cu); | |
debd256d | 1398 | |
f3f5162e DE |
1399 | static void dwarf_decode_lines (struct line_header *, const char *, |
1400 | struct dwarf2_cu *, struct partial_symtab *, | |
1401 | int); | |
c906108c | 1402 | |
72b9f47f | 1403 | static void dwarf2_start_subfile (char *, const char *, const char *); |
c906108c | 1404 | |
f4dc4d17 DE |
1405 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
1406 | char *, char *, CORE_ADDR); | |
1407 | ||
a14ed312 | 1408 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1409 | struct dwarf2_cu *); |
c906108c | 1410 | |
34eaf542 TT |
1411 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1412 | struct dwarf2_cu *, struct symbol *); | |
1413 | ||
a14ed312 | 1414 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
e7c27a73 | 1415 | struct dwarf2_cu *); |
c906108c | 1416 | |
98bfdba5 PA |
1417 | static void dwarf2_const_value_attr (struct attribute *attr, |
1418 | struct type *type, | |
1419 | const char *name, | |
1420 | struct obstack *obstack, | |
12df843f | 1421 | struct dwarf2_cu *cu, LONGEST *value, |
98bfdba5 PA |
1422 | gdb_byte **bytes, |
1423 | struct dwarf2_locexpr_baton **baton); | |
2df3850c | 1424 | |
e7c27a73 | 1425 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1426 | |
b4ba55a1 JB |
1427 | static int need_gnat_info (struct dwarf2_cu *); |
1428 | ||
3e43a32a MS |
1429 | static struct type *die_descriptive_type (struct die_info *, |
1430 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1431 | |
1432 | static void set_descriptive_type (struct type *, struct die_info *, | |
1433 | struct dwarf2_cu *); | |
1434 | ||
e7c27a73 DJ |
1435 | static struct type *die_containing_type (struct die_info *, |
1436 | struct dwarf2_cu *); | |
c906108c | 1437 | |
673bfd45 DE |
1438 | static struct type *lookup_die_type (struct die_info *, struct attribute *, |
1439 | struct dwarf2_cu *); | |
c906108c | 1440 | |
f792889a | 1441 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1442 | |
673bfd45 DE |
1443 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1444 | ||
0d5cff50 | 1445 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1446 | |
6e70227d | 1447 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1448 | const char *suffix, int physname, |
1449 | struct dwarf2_cu *cu); | |
63d06c5c | 1450 | |
e7c27a73 | 1451 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1452 | |
348e048f DE |
1453 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1454 | ||
e7c27a73 | 1455 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1456 | |
e7c27a73 | 1457 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1458 | |
96408a79 SA |
1459 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1460 | ||
ff013f42 JK |
1461 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1462 | struct dwarf2_cu *, struct partial_symtab *); | |
1463 | ||
a14ed312 | 1464 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1465 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1466 | struct partial_symtab *); | |
c906108c | 1467 | |
fae299cd DC |
1468 | static void get_scope_pc_bounds (struct die_info *, |
1469 | CORE_ADDR *, CORE_ADDR *, | |
1470 | struct dwarf2_cu *); | |
1471 | ||
801e3a5b JB |
1472 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1473 | CORE_ADDR, struct dwarf2_cu *); | |
1474 | ||
a14ed312 | 1475 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1476 | struct dwarf2_cu *); |
c906108c | 1477 | |
a14ed312 | 1478 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1479 | struct type *, struct dwarf2_cu *); |
c906108c | 1480 | |
a14ed312 | 1481 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1482 | struct die_info *, struct type *, |
e7c27a73 | 1483 | struct dwarf2_cu *); |
c906108c | 1484 | |
a14ed312 | 1485 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1486 | struct type *, |
1487 | struct dwarf2_cu *); | |
c906108c | 1488 | |
134d01f1 | 1489 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1490 | |
e7c27a73 | 1491 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1492 | |
e7c27a73 | 1493 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1494 | |
5d7cb8df JK |
1495 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1496 | ||
27aa8d6a SW |
1497 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1498 | ||
f55ee35c JK |
1499 | static struct type *read_module_type (struct die_info *die, |
1500 | struct dwarf2_cu *cu); | |
1501 | ||
38d518c9 | 1502 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1503 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1504 | |
134d01f1 | 1505 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1506 | |
e7c27a73 | 1507 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1508 | |
6e70227d | 1509 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1510 | struct dwarf2_cu *); |
1511 | ||
dee91e82 | 1512 | static struct die_info *read_die_and_children (const struct die_reader_specs *, |
93311388 | 1513 | gdb_byte *info_ptr, |
fe1b8b76 | 1514 | gdb_byte **new_info_ptr, |
639d11d3 DC |
1515 | struct die_info *parent); |
1516 | ||
dee91e82 | 1517 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
93311388 | 1518 | gdb_byte *info_ptr, |
fe1b8b76 | 1519 | gdb_byte **new_info_ptr, |
639d11d3 DC |
1520 | struct die_info *parent); |
1521 | ||
3019eac3 DE |
1522 | static gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1523 | struct die_info **, gdb_byte *, int *, int); | |
1524 | ||
dee91e82 DE |
1525 | static gdb_byte *read_full_die (const struct die_reader_specs *, |
1526 | struct die_info **, gdb_byte *, int *); | |
93311388 | 1527 | |
e7c27a73 | 1528 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1529 | |
71c25dea TT |
1530 | static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu *, |
1531 | struct obstack *); | |
1532 | ||
e142c38c | 1533 | static char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1534 | |
98bfdba5 PA |
1535 | static const char *dwarf2_full_name (char *name, |
1536 | struct die_info *die, | |
1537 | struct dwarf2_cu *cu); | |
1538 | ||
e142c38c | 1539 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1540 | struct dwarf2_cu **); |
9219021c | 1541 | |
f39c6ffd | 1542 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1543 | |
f39c6ffd | 1544 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1545 | |
f39c6ffd | 1546 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1547 | |
a14ed312 | 1548 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1549 | |
f39c6ffd | 1550 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1551 | |
f9aca02d | 1552 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1553 | |
d97bc12b DE |
1554 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1555 | ||
1556 | static void dump_die_for_error (struct die_info *); | |
1557 | ||
1558 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1559 | struct die_info *); | |
c906108c | 1560 | |
d97bc12b | 1561 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1562 | |
51545339 | 1563 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1564 | struct dwarf2_cu *); |
c906108c | 1565 | |
93311388 DE |
1566 | static int is_ref_attr (struct attribute *); |
1567 | ||
b64f50a1 | 1568 | static sect_offset dwarf2_get_ref_die_offset (struct attribute *); |
c906108c | 1569 | |
43bbcdc2 | 1570 | static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int); |
a02abb62 | 1571 | |
348e048f DE |
1572 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
1573 | struct attribute *, | |
1574 | struct dwarf2_cu **); | |
1575 | ||
10b3939b DJ |
1576 | static struct die_info *follow_die_ref (struct die_info *, |
1577 | struct attribute *, | |
f2f0e013 | 1578 | struct dwarf2_cu **); |
c906108c | 1579 | |
348e048f DE |
1580 | static struct die_info *follow_die_sig (struct die_info *, |
1581 | struct attribute *, | |
1582 | struct dwarf2_cu **); | |
1583 | ||
6c83ed52 TT |
1584 | static struct signatured_type *lookup_signatured_type_at_offset |
1585 | (struct objfile *objfile, | |
b64f50a1 | 1586 | struct dwarf2_section_info *section, sect_offset offset); |
6c83ed52 | 1587 | |
e5fe5e75 | 1588 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1589 | |
52dc124a | 1590 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1591 | |
f4dc4d17 | 1592 | static struct type_unit_group *get_type_unit_group |
094b34ac | 1593 | (struct dwarf2_cu *, struct attribute *); |
f4dc4d17 DE |
1594 | |
1595 | static void build_type_unit_groups (die_reader_func_ftype *, void *); | |
1596 | ||
c906108c SS |
1597 | /* memory allocation interface */ |
1598 | ||
7b5a2f43 | 1599 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1600 | |
b60c80d6 | 1601 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1602 | |
09262596 DE |
1603 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
1604 | char *, int); | |
2e276125 | 1605 | |
8e19ed76 PS |
1606 | static int attr_form_is_block (struct attribute *); |
1607 | ||
3690dd37 JB |
1608 | static int attr_form_is_section_offset (struct attribute *); |
1609 | ||
1610 | static int attr_form_is_constant (struct attribute *); | |
1611 | ||
8cf6f0b1 TT |
1612 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1613 | struct dwarf2_loclist_baton *baton, | |
1614 | struct attribute *attr); | |
1615 | ||
93e7bd98 DJ |
1616 | static void dwarf2_symbol_mark_computed (struct attribute *attr, |
1617 | struct symbol *sym, | |
1618 | struct dwarf2_cu *cu); | |
4c2df51b | 1619 | |
dee91e82 DE |
1620 | static gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1621 | gdb_byte *info_ptr, | |
1622 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1623 | |
72bf9492 DJ |
1624 | static void free_stack_comp_unit (void *); |
1625 | ||
72bf9492 DJ |
1626 | static hashval_t partial_die_hash (const void *item); |
1627 | ||
1628 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1629 | ||
ae038cb0 | 1630 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1631 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1632 | |
9816fde3 | 1633 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1634 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1635 | |
1636 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1637 | struct die_info *comp_unit_die, |
1638 | enum language pretend_language); | |
93311388 | 1639 | |
68dc6402 | 1640 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1641 | |
1642 | static void free_cached_comp_units (void *); | |
1643 | ||
1644 | static void age_cached_comp_units (void); | |
1645 | ||
dee91e82 | 1646 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1647 | |
f792889a DJ |
1648 | static struct type *set_die_type (struct die_info *, struct type *, |
1649 | struct dwarf2_cu *); | |
1c379e20 | 1650 | |
ae038cb0 DJ |
1651 | static void create_all_comp_units (struct objfile *); |
1652 | ||
0e50663e | 1653 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1654 | |
95554aad TT |
1655 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1656 | enum language); | |
10b3939b | 1657 | |
95554aad TT |
1658 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1659 | enum language); | |
10b3939b | 1660 | |
f4dc4d17 DE |
1661 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1662 | enum language); | |
1663 | ||
10b3939b DJ |
1664 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1665 | struct dwarf2_per_cu_data *); | |
1666 | ||
ae038cb0 DJ |
1667 | static void dwarf2_mark (struct dwarf2_cu *); |
1668 | ||
1669 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1670 | ||
b64f50a1 | 1671 | static struct type *get_die_type_at_offset (sect_offset, |
673bfd45 DE |
1672 | struct dwarf2_per_cu_data *per_cu); |
1673 | ||
f792889a | 1674 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1675 | |
9291a0cd TT |
1676 | static void dwarf2_release_queue (void *dummy); |
1677 | ||
95554aad TT |
1678 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1679 | enum language pretend_language); | |
1680 | ||
1681 | static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
1682 | struct dwarf2_per_cu_data *per_cu, | |
1683 | enum language pretend_language); | |
9291a0cd | 1684 | |
a0f42c21 | 1685 | static void process_queue (void); |
9291a0cd TT |
1686 | |
1687 | static void find_file_and_directory (struct die_info *die, | |
1688 | struct dwarf2_cu *cu, | |
1689 | char **name, char **comp_dir); | |
1690 | ||
1691 | static char *file_full_name (int file, struct line_header *lh, | |
1692 | const char *comp_dir); | |
1693 | ||
36586728 TT |
1694 | static gdb_byte *read_and_check_comp_unit_head |
1695 | (struct comp_unit_head *header, | |
1696 | struct dwarf2_section_info *section, | |
1697 | struct dwarf2_section_info *abbrev_section, gdb_byte *info_ptr, | |
1698 | int is_debug_types_section); | |
1699 | ||
fd820528 | 1700 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1701 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1702 | int use_existing_cu, int keep, | |
3019eac3 DE |
1703 | die_reader_func_ftype *die_reader_func, void *data); |
1704 | ||
dee91e82 DE |
1705 | static void init_cutu_and_read_dies_simple |
1706 | (struct dwarf2_per_cu_data *this_cu, | |
1707 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1708 | |
673bfd45 | 1709 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1710 | |
3019eac3 DE |
1711 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1712 | ||
1713 | static struct dwo_unit *lookup_dwo_comp_unit | |
a1855c1d | 1714 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1715 | |
1716 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1717 | (struct signatured_type *, const char *, const char *); |
3019eac3 DE |
1718 | |
1719 | static void free_dwo_file_cleanup (void *); | |
1720 | ||
95554aad TT |
1721 | static void process_cu_includes (void); |
1722 | ||
1b80a9fa JK |
1723 | static void check_producer (struct dwarf2_cu *cu); |
1724 | ||
9291a0cd TT |
1725 | #if WORDS_BIGENDIAN |
1726 | ||
1727 | /* Convert VALUE between big- and little-endian. */ | |
1728 | static offset_type | |
1729 | byte_swap (offset_type value) | |
1730 | { | |
1731 | offset_type result; | |
1732 | ||
1733 | result = (value & 0xff) << 24; | |
1734 | result |= (value & 0xff00) << 8; | |
1735 | result |= (value & 0xff0000) >> 8; | |
1736 | result |= (value & 0xff000000) >> 24; | |
1737 | return result; | |
1738 | } | |
1739 | ||
1740 | #define MAYBE_SWAP(V) byte_swap (V) | |
1741 | ||
1742 | #else | |
1743 | #define MAYBE_SWAP(V) (V) | |
1744 | #endif /* WORDS_BIGENDIAN */ | |
1745 | ||
1746 | /* The suffix for an index file. */ | |
1747 | #define INDEX_SUFFIX ".gdb-index" | |
1748 | ||
3da10d80 KS |
1749 | static const char *dwarf2_physname (char *name, struct die_info *die, |
1750 | struct dwarf2_cu *cu); | |
1751 | ||
c906108c | 1752 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1753 | information and return true if we have enough to do something. |
1754 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1755 | ELF names are used. */ | |
c906108c SS |
1756 | |
1757 | int | |
251d32d9 TG |
1758 | dwarf2_has_info (struct objfile *objfile, |
1759 | const struct dwarf2_debug_sections *names) | |
c906108c | 1760 | { |
be391dca TT |
1761 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1762 | if (!dwarf2_per_objfile) | |
1763 | { | |
1764 | /* Initialize per-objfile state. */ | |
1765 | struct dwarf2_per_objfile *data | |
1766 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1767 | |
be391dca TT |
1768 | memset (data, 0, sizeof (*data)); |
1769 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1770 | dwarf2_per_objfile = data; | |
6502dd73 | 1771 | |
251d32d9 TG |
1772 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1773 | (void *) names); | |
be391dca TT |
1774 | dwarf2_per_objfile->objfile = objfile; |
1775 | } | |
1776 | return (dwarf2_per_objfile->info.asection != NULL | |
1777 | && dwarf2_per_objfile->abbrev.asection != NULL); | |
c906108c SS |
1778 | } |
1779 | ||
251d32d9 TG |
1780 | /* When loading sections, we look either for uncompressed section or for |
1781 | compressed section names. */ | |
233a11ab CS |
1782 | |
1783 | static int | |
251d32d9 TG |
1784 | section_is_p (const char *section_name, |
1785 | const struct dwarf2_section_names *names) | |
233a11ab | 1786 | { |
251d32d9 TG |
1787 | if (names->normal != NULL |
1788 | && strcmp (section_name, names->normal) == 0) | |
1789 | return 1; | |
1790 | if (names->compressed != NULL | |
1791 | && strcmp (section_name, names->compressed) == 0) | |
1792 | return 1; | |
1793 | return 0; | |
233a11ab CS |
1794 | } |
1795 | ||
c906108c SS |
1796 | /* This function is mapped across the sections and remembers the |
1797 | offset and size of each of the debugging sections we are interested | |
1798 | in. */ | |
1799 | ||
1800 | static void | |
251d32d9 | 1801 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 1802 | { |
251d32d9 | 1803 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 1804 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
1805 | |
1806 | if (vnames == NULL) | |
1807 | names = &dwarf2_elf_names; | |
1808 | else | |
1809 | names = (const struct dwarf2_debug_sections *) vnames; | |
1810 | ||
dc7650b8 JK |
1811 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1812 | { | |
1813 | } | |
1814 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 1815 | { |
dce234bc PP |
1816 | dwarf2_per_objfile->info.asection = sectp; |
1817 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); | |
c906108c | 1818 | } |
251d32d9 | 1819 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 1820 | { |
dce234bc PP |
1821 | dwarf2_per_objfile->abbrev.asection = sectp; |
1822 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 1823 | } |
251d32d9 | 1824 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 1825 | { |
dce234bc PP |
1826 | dwarf2_per_objfile->line.asection = sectp; |
1827 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); | |
c906108c | 1828 | } |
251d32d9 | 1829 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 1830 | { |
dce234bc PP |
1831 | dwarf2_per_objfile->loc.asection = sectp; |
1832 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); | |
c906108c | 1833 | } |
251d32d9 | 1834 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 1835 | { |
dce234bc PP |
1836 | dwarf2_per_objfile->macinfo.asection = sectp; |
1837 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 1838 | } |
cf2c3c16 TT |
1839 | else if (section_is_p (sectp->name, &names->macro)) |
1840 | { | |
1841 | dwarf2_per_objfile->macro.asection = sectp; | |
1842 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); | |
1843 | } | |
251d32d9 | 1844 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 1845 | { |
dce234bc PP |
1846 | dwarf2_per_objfile->str.asection = sectp; |
1847 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); | |
c906108c | 1848 | } |
3019eac3 DE |
1849 | else if (section_is_p (sectp->name, &names->addr)) |
1850 | { | |
1851 | dwarf2_per_objfile->addr.asection = sectp; | |
1852 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); | |
1853 | } | |
251d32d9 | 1854 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 1855 | { |
dce234bc PP |
1856 | dwarf2_per_objfile->frame.asection = sectp; |
1857 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1858 | } |
251d32d9 | 1859 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 1860 | { |
dc7650b8 JK |
1861 | dwarf2_per_objfile->eh_frame.asection = sectp; |
1862 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1863 | } |
251d32d9 | 1864 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 1865 | { |
dce234bc PP |
1866 | dwarf2_per_objfile->ranges.asection = sectp; |
1867 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 1868 | } |
251d32d9 | 1869 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 1870 | { |
8b70b953 TT |
1871 | struct dwarf2_section_info type_section; |
1872 | ||
1873 | memset (&type_section, 0, sizeof (type_section)); | |
1874 | type_section.asection = sectp; | |
1875 | type_section.size = bfd_get_section_size (sectp); | |
1876 | ||
1877 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
1878 | &type_section); | |
348e048f | 1879 | } |
251d32d9 | 1880 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd TT |
1881 | { |
1882 | dwarf2_per_objfile->gdb_index.asection = sectp; | |
1883 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); | |
1884 | } | |
dce234bc | 1885 | |
72dca2f5 FR |
1886 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
1887 | && bfd_section_vma (abfd, sectp) == 0) | |
1888 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
1889 | } |
1890 | ||
fceca515 DE |
1891 | /* A helper function that decides whether a section is empty, |
1892 | or not present. */ | |
9e0ac564 TT |
1893 | |
1894 | static int | |
1895 | dwarf2_section_empty_p (struct dwarf2_section_info *info) | |
1896 | { | |
1897 | return info->asection == NULL || info->size == 0; | |
1898 | } | |
1899 | ||
3019eac3 DE |
1900 | /* Read the contents of the section INFO. |
1901 | OBJFILE is the main object file, but not necessarily the file where | |
1902 | the section comes from. E.g., for DWO files INFO->asection->owner | |
1903 | is the bfd of the DWO file. | |
dce234bc | 1904 | If the section is compressed, uncompress it before returning. */ |
c906108c | 1905 | |
dce234bc PP |
1906 | static void |
1907 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 1908 | { |
dce234bc | 1909 | asection *sectp = info->asection; |
3019eac3 | 1910 | bfd *abfd; |
dce234bc PP |
1911 | gdb_byte *buf, *retbuf; |
1912 | unsigned char header[4]; | |
c906108c | 1913 | |
be391dca TT |
1914 | if (info->readin) |
1915 | return; | |
dce234bc | 1916 | info->buffer = NULL; |
be391dca | 1917 | info->readin = 1; |
188dd5d6 | 1918 | |
9e0ac564 | 1919 | if (dwarf2_section_empty_p (info)) |
dce234bc | 1920 | return; |
c906108c | 1921 | |
3019eac3 DE |
1922 | abfd = sectp->owner; |
1923 | ||
4bf44c1c TT |
1924 | /* If the section has relocations, we must read it ourselves. |
1925 | Otherwise we attach it to the BFD. */ | |
1926 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 1927 | { |
4bf44c1c | 1928 | const gdb_byte *bytes = gdb_bfd_map_section (sectp, &info->size); |
dce234bc | 1929 | |
4bf44c1c TT |
1930 | /* We have to cast away const here for historical reasons. |
1931 | Fixing dwarf2read to be const-correct would be quite nice. */ | |
1932 | info->buffer = (gdb_byte *) bytes; | |
1933 | return; | |
dce234bc | 1934 | } |
dce234bc | 1935 | |
4bf44c1c TT |
1936 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
1937 | info->buffer = buf; | |
dce234bc PP |
1938 | |
1939 | /* When debugging .o files, we may need to apply relocations; see | |
1940 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
1941 | We never compress sections in .o files, so we only need to | |
1942 | try this when the section is not compressed. */ | |
ac8035ab | 1943 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
1944 | if (retbuf != NULL) |
1945 | { | |
1946 | info->buffer = retbuf; | |
1947 | return; | |
1948 | } | |
1949 | ||
1950 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 | |
1951 | || bfd_bread (buf, info->size, abfd) != info->size) | |
1952 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), | |
1953 | bfd_get_filename (abfd)); | |
1954 | } | |
1955 | ||
9e0ac564 TT |
1956 | /* A helper function that returns the size of a section in a safe way. |
1957 | If you are positive that the section has been read before using the | |
1958 | size, then it is safe to refer to the dwarf2_section_info object's | |
1959 | "size" field directly. In other cases, you must call this | |
1960 | function, because for compressed sections the size field is not set | |
1961 | correctly until the section has been read. */ | |
1962 | ||
1963 | static bfd_size_type | |
1964 | dwarf2_section_size (struct objfile *objfile, | |
1965 | struct dwarf2_section_info *info) | |
1966 | { | |
1967 | if (!info->readin) | |
1968 | dwarf2_read_section (objfile, info); | |
1969 | return info->size; | |
1970 | } | |
1971 | ||
dce234bc | 1972 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 1973 | SECTION_NAME. */ |
af34e669 | 1974 | |
dce234bc | 1975 | void |
3017a003 TG |
1976 | dwarf2_get_section_info (struct objfile *objfile, |
1977 | enum dwarf2_section_enum sect, | |
dce234bc PP |
1978 | asection **sectp, gdb_byte **bufp, |
1979 | bfd_size_type *sizep) | |
1980 | { | |
1981 | struct dwarf2_per_objfile *data | |
1982 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
1983 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
1984 | |
1985 | /* We may see an objfile without any DWARF, in which case we just | |
1986 | return nothing. */ | |
1987 | if (data == NULL) | |
1988 | { | |
1989 | *sectp = NULL; | |
1990 | *bufp = NULL; | |
1991 | *sizep = 0; | |
1992 | return; | |
1993 | } | |
3017a003 TG |
1994 | switch (sect) |
1995 | { | |
1996 | case DWARF2_DEBUG_FRAME: | |
1997 | info = &data->frame; | |
1998 | break; | |
1999 | case DWARF2_EH_FRAME: | |
2000 | info = &data->eh_frame; | |
2001 | break; | |
2002 | default: | |
2003 | gdb_assert_not_reached ("unexpected section"); | |
2004 | } | |
dce234bc | 2005 | |
9e0ac564 | 2006 | dwarf2_read_section (objfile, info); |
dce234bc PP |
2007 | |
2008 | *sectp = info->asection; | |
2009 | *bufp = info->buffer; | |
2010 | *sizep = info->size; | |
2011 | } | |
2012 | ||
36586728 TT |
2013 | /* A helper function to find the sections for a .dwz file. */ |
2014 | ||
2015 | static void | |
2016 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2017 | { | |
2018 | struct dwz_file *dwz_file = arg; | |
2019 | ||
2020 | /* Note that we only support the standard ELF names, because .dwz | |
2021 | is ELF-only (at the time of writing). */ | |
2022 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2023 | { | |
2024 | dwz_file->abbrev.asection = sectp; | |
2025 | dwz_file->abbrev.size = bfd_get_section_size (sectp); | |
2026 | } | |
2027 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2028 | { | |
2029 | dwz_file->info.asection = sectp; | |
2030 | dwz_file->info.size = bfd_get_section_size (sectp); | |
2031 | } | |
2032 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2033 | { | |
2034 | dwz_file->str.asection = sectp; | |
2035 | dwz_file->str.size = bfd_get_section_size (sectp); | |
2036 | } | |
2037 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2038 | { | |
2039 | dwz_file->line.asection = sectp; | |
2040 | dwz_file->line.size = bfd_get_section_size (sectp); | |
2041 | } | |
2042 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2043 | { | |
2044 | dwz_file->macro.asection = sectp; | |
2045 | dwz_file->macro.size = bfd_get_section_size (sectp); | |
2046 | } | |
2ec9a5e0 TT |
2047 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2048 | { | |
2049 | dwz_file->gdb_index.asection = sectp; | |
2050 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); | |
2051 | } | |
36586728 TT |
2052 | } |
2053 | ||
2054 | /* Open the separate '.dwz' debug file, if needed. Error if the file | |
2055 | cannot be found. */ | |
2056 | ||
2057 | static struct dwz_file * | |
2058 | dwarf2_get_dwz_file (void) | |
2059 | { | |
2060 | bfd *abfd, *dwz_bfd; | |
2061 | asection *section; | |
2062 | gdb_byte *data; | |
2063 | struct cleanup *cleanup; | |
2064 | const char *filename; | |
2065 | struct dwz_file *result; | |
2066 | ||
2067 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2068 | return dwarf2_per_objfile->dwz_file; | |
2069 | ||
2070 | abfd = dwarf2_per_objfile->objfile->obfd; | |
2071 | section = bfd_get_section_by_name (abfd, ".gnu_debugaltlink"); | |
2072 | if (section == NULL) | |
2073 | error (_("could not find '.gnu_debugaltlink' section")); | |
2074 | if (!bfd_malloc_and_get_section (abfd, section, &data)) | |
2075 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2076 | bfd_errmsg (bfd_get_error ())); | |
2077 | cleanup = make_cleanup (xfree, data); | |
2078 | ||
2079 | filename = data; | |
2080 | if (!IS_ABSOLUTE_PATH (filename)) | |
2081 | { | |
2082 | char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name); | |
2083 | char *rel; | |
2084 | ||
2085 | make_cleanup (xfree, abs); | |
2086 | abs = ldirname (abs); | |
2087 | make_cleanup (xfree, abs); | |
2088 | ||
2089 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2090 | make_cleanup (xfree, rel); | |
2091 | filename = rel; | |
2092 | } | |
2093 | ||
2094 | /* The format is just a NUL-terminated file name, followed by the | |
2095 | build-id. For now, though, we ignore the build-id. */ | |
2096 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); | |
2097 | if (dwz_bfd == NULL) | |
2098 | error (_("could not read '%s': %s"), filename, | |
2099 | bfd_errmsg (bfd_get_error ())); | |
2100 | ||
2101 | if (!bfd_check_format (dwz_bfd, bfd_object)) | |
2102 | { | |
2103 | gdb_bfd_unref (dwz_bfd); | |
2104 | error (_("file '%s' was not usable: %s"), filename, | |
2105 | bfd_errmsg (bfd_get_error ())); | |
2106 | } | |
2107 | ||
2108 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, | |
2109 | struct dwz_file); | |
2110 | result->dwz_bfd = dwz_bfd; | |
2111 | ||
2112 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2113 | ||
2114 | do_cleanups (cleanup); | |
2115 | ||
8d2cc612 | 2116 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2117 | return result; |
2118 | } | |
9291a0cd | 2119 | \f |
7b9f3c50 DE |
2120 | /* DWARF quick_symbols_functions support. */ |
2121 | ||
2122 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2123 | unique line tables, so we maintain a separate table of all .debug_line | |
2124 | derived entries to support the sharing. | |
2125 | All the quick functions need is the list of file names. We discard the | |
2126 | line_header when we're done and don't need to record it here. */ | |
2127 | struct quick_file_names | |
2128 | { | |
094b34ac DE |
2129 | /* The data used to construct the hash key. */ |
2130 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2131 | |
2132 | /* The number of entries in file_names, real_names. */ | |
2133 | unsigned int num_file_names; | |
2134 | ||
2135 | /* The file names from the line table, after being run through | |
2136 | file_full_name. */ | |
2137 | const char **file_names; | |
2138 | ||
2139 | /* The file names from the line table after being run through | |
2140 | gdb_realpath. These are computed lazily. */ | |
2141 | const char **real_names; | |
2142 | }; | |
2143 | ||
2144 | /* When using the index (and thus not using psymtabs), each CU has an | |
2145 | object of this type. This is used to hold information needed by | |
2146 | the various "quick" methods. */ | |
2147 | struct dwarf2_per_cu_quick_data | |
2148 | { | |
2149 | /* The file table. This can be NULL if there was no file table | |
2150 | or it's currently not read in. | |
2151 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2152 | struct quick_file_names *file_names; | |
2153 | ||
2154 | /* The corresponding symbol table. This is NULL if symbols for this | |
2155 | CU have not yet been read. */ | |
2156 | struct symtab *symtab; | |
2157 | ||
2158 | /* A temporary mark bit used when iterating over all CUs in | |
2159 | expand_symtabs_matching. */ | |
2160 | unsigned int mark : 1; | |
2161 | ||
2162 | /* True if we've tried to read the file table and found there isn't one. | |
2163 | There will be no point in trying to read it again next time. */ | |
2164 | unsigned int no_file_data : 1; | |
2165 | }; | |
2166 | ||
094b34ac DE |
2167 | /* Utility hash function for a stmt_list_hash. */ |
2168 | ||
2169 | static hashval_t | |
2170 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2171 | { | |
2172 | hashval_t v = 0; | |
2173 | ||
2174 | if (stmt_list_hash->dwo_unit != NULL) | |
2175 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2176 | v += stmt_list_hash->line_offset.sect_off; | |
2177 | return v; | |
2178 | } | |
2179 | ||
2180 | /* Utility equality function for a stmt_list_hash. */ | |
2181 | ||
2182 | static int | |
2183 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2184 | const struct stmt_list_hash *rhs) | |
2185 | { | |
2186 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2187 | return 0; | |
2188 | if (lhs->dwo_unit != NULL | |
2189 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2190 | return 0; | |
2191 | ||
2192 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2193 | } | |
2194 | ||
7b9f3c50 DE |
2195 | /* Hash function for a quick_file_names. */ |
2196 | ||
2197 | static hashval_t | |
2198 | hash_file_name_entry (const void *e) | |
2199 | { | |
2200 | const struct quick_file_names *file_data = e; | |
2201 | ||
094b34ac | 2202 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2203 | } |
2204 | ||
2205 | /* Equality function for a quick_file_names. */ | |
2206 | ||
2207 | static int | |
2208 | eq_file_name_entry (const void *a, const void *b) | |
2209 | { | |
2210 | const struct quick_file_names *ea = a; | |
2211 | const struct quick_file_names *eb = b; | |
2212 | ||
094b34ac | 2213 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2214 | } |
2215 | ||
2216 | /* Delete function for a quick_file_names. */ | |
2217 | ||
2218 | static void | |
2219 | delete_file_name_entry (void *e) | |
2220 | { | |
2221 | struct quick_file_names *file_data = e; | |
2222 | int i; | |
2223 | ||
2224 | for (i = 0; i < file_data->num_file_names; ++i) | |
2225 | { | |
2226 | xfree ((void*) file_data->file_names[i]); | |
2227 | if (file_data->real_names) | |
2228 | xfree ((void*) file_data->real_names[i]); | |
2229 | } | |
2230 | ||
2231 | /* The space for the struct itself lives on objfile_obstack, | |
2232 | so we don't free it here. */ | |
2233 | } | |
2234 | ||
2235 | /* Create a quick_file_names hash table. */ | |
2236 | ||
2237 | static htab_t | |
2238 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2239 | { | |
2240 | return htab_create_alloc (nr_initial_entries, | |
2241 | hash_file_name_entry, eq_file_name_entry, | |
2242 | delete_file_name_entry, xcalloc, xfree); | |
2243 | } | |
9291a0cd | 2244 | |
918dd910 JK |
2245 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2246 | have to be created afterwards. You should call age_cached_comp_units after | |
2247 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2248 | ||
2249 | static void | |
2250 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2251 | { | |
3019eac3 | 2252 | if (per_cu->is_debug_types) |
e5fe5e75 | 2253 | load_full_type_unit (per_cu); |
918dd910 | 2254 | else |
95554aad | 2255 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2256 | |
918dd910 | 2257 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2258 | |
2259 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2260 | } |
2261 | ||
a0f42c21 | 2262 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2263 | |
9291a0cd | 2264 | static void |
a0f42c21 | 2265 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2266 | { |
2267 | struct cleanup *back_to; | |
2268 | ||
f4dc4d17 DE |
2269 | /* Skip type_unit_groups, reading the type units they contain |
2270 | is handled elsewhere. */ | |
2271 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2272 | return; | |
2273 | ||
9291a0cd TT |
2274 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2275 | ||
95554aad TT |
2276 | if (dwarf2_per_objfile->using_index |
2277 | ? per_cu->v.quick->symtab == NULL | |
2278 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2279 | { | |
2280 | queue_comp_unit (per_cu, language_minimal); | |
2281 | load_cu (per_cu); | |
2282 | } | |
9291a0cd | 2283 | |
a0f42c21 | 2284 | process_queue (); |
9291a0cd TT |
2285 | |
2286 | /* Age the cache, releasing compilation units that have not | |
2287 | been used recently. */ | |
2288 | age_cached_comp_units (); | |
2289 | ||
2290 | do_cleanups (back_to); | |
2291 | } | |
2292 | ||
2293 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2294 | the objfile from which this CU came. Returns the resulting symbol | |
2295 | table. */ | |
2fdf6df6 | 2296 | |
9291a0cd | 2297 | static struct symtab * |
a0f42c21 | 2298 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2299 | { |
95554aad | 2300 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2301 | if (!per_cu->v.quick->symtab) |
2302 | { | |
2303 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2304 | increment_reading_symtab (); | |
a0f42c21 | 2305 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2306 | process_cu_includes (); |
9291a0cd TT |
2307 | do_cleanups (back_to); |
2308 | } | |
2309 | return per_cu->v.quick->symtab; | |
2310 | } | |
2311 | ||
f4dc4d17 DE |
2312 | /* Return the CU given its index. |
2313 | ||
2314 | This is intended for loops like: | |
2315 | ||
2316 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2317 | + dwarf2_per_objfile->n_type_units); ++i) | |
2318 | { | |
2319 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
2320 | ||
2321 | ...; | |
2322 | } | |
2323 | */ | |
2fdf6df6 | 2324 | |
1fd400ff TT |
2325 | static struct dwarf2_per_cu_data * |
2326 | dw2_get_cu (int index) | |
2327 | { | |
2328 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2329 | { | |
f4dc4d17 | 2330 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2331 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2332 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2333 | } |
2334 | ||
2335 | return dwarf2_per_objfile->all_comp_units[index]; | |
2336 | } | |
2337 | ||
2338 | /* Return the primary CU given its index. | |
2339 | The difference between this function and dw2_get_cu is in the handling | |
2340 | of type units (TUs). Here we return the type_unit_group object. | |
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_unit_groups); ++i) | |
2346 | { | |
2347 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); | |
2348 | ||
2349 | ...; | |
2350 | } | |
2351 | */ | |
2352 | ||
2353 | static struct dwarf2_per_cu_data * | |
2354 | dw2_get_primary_cu (int index) | |
2355 | { | |
2356 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2357 | { | |
1fd400ff | 2358 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2359 | gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups); |
2360 | return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu; | |
1fd400ff | 2361 | } |
f4dc4d17 | 2362 | |
1fd400ff TT |
2363 | return dwarf2_per_objfile->all_comp_units[index]; |
2364 | } | |
2365 | ||
2ec9a5e0 TT |
2366 | /* A helper for create_cus_from_index that handles a given list of |
2367 | CUs. */ | |
2fdf6df6 | 2368 | |
74a0d9f6 | 2369 | static void |
2ec9a5e0 TT |
2370 | create_cus_from_index_list (struct objfile *objfile, |
2371 | const gdb_byte *cu_list, offset_type n_elements, | |
2372 | struct dwarf2_section_info *section, | |
2373 | int is_dwz, | |
2374 | int base_offset) | |
9291a0cd TT |
2375 | { |
2376 | offset_type i; | |
9291a0cd | 2377 | |
2ec9a5e0 | 2378 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2379 | { |
2380 | struct dwarf2_per_cu_data *the_cu; | |
2381 | ULONGEST offset, length; | |
2382 | ||
74a0d9f6 JK |
2383 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2384 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2385 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2386 | cu_list += 2 * 8; |
2387 | ||
2388 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2389 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2390 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2391 | the_cu->length = length; |
2392 | the_cu->objfile = objfile; | |
2ec9a5e0 | 2393 | the_cu->info_or_types_section = section; |
9291a0cd TT |
2394 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2395 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2396 | the_cu->is_dwz = is_dwz; |
2397 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2398 | } |
9291a0cd TT |
2399 | } |
2400 | ||
2ec9a5e0 | 2401 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2402 | the CU objects for this objfile. */ |
2ec9a5e0 | 2403 | |
74a0d9f6 | 2404 | static void |
2ec9a5e0 TT |
2405 | create_cus_from_index (struct objfile *objfile, |
2406 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2407 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2408 | { | |
2409 | struct dwz_file *dwz; | |
2410 | ||
2411 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2412 | dwarf2_per_objfile->all_comp_units | |
2413 | = obstack_alloc (&objfile->objfile_obstack, | |
2414 | dwarf2_per_objfile->n_comp_units | |
2415 | * sizeof (struct dwarf2_per_cu_data *)); | |
2416 | ||
74a0d9f6 JK |
2417 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2418 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2419 | |
2420 | if (dwz_elements == 0) | |
74a0d9f6 | 2421 | return; |
2ec9a5e0 TT |
2422 | |
2423 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2424 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2425 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2426 | } |
2427 | ||
1fd400ff | 2428 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2429 | |
74a0d9f6 | 2430 | static void |
673bfd45 | 2431 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2432 | struct dwarf2_section_info *section, |
673bfd45 DE |
2433 | const gdb_byte *bytes, |
2434 | offset_type elements) | |
1fd400ff TT |
2435 | { |
2436 | offset_type i; | |
673bfd45 | 2437 | htab_t sig_types_hash; |
1fd400ff | 2438 | |
d467dd73 DE |
2439 | dwarf2_per_objfile->n_type_units = elements / 3; |
2440 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 2441 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 2442 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 2443 | * sizeof (struct signatured_type *)); |
1fd400ff | 2444 | |
673bfd45 | 2445 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2446 | |
2447 | for (i = 0; i < elements; i += 3) | |
2448 | { | |
52dc124a DE |
2449 | struct signatured_type *sig_type; |
2450 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2451 | void **slot; |
2452 | ||
74a0d9f6 JK |
2453 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2454 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2455 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2456 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2457 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2458 | bytes += 3 * 8; | |
2459 | ||
52dc124a | 2460 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2461 | struct signatured_type); |
52dc124a | 2462 | sig_type->signature = signature; |
3019eac3 DE |
2463 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2464 | sig_type->per_cu.is_debug_types = 1; | |
2465 | sig_type->per_cu.info_or_types_section = section; | |
52dc124a DE |
2466 | sig_type->per_cu.offset.sect_off = offset; |
2467 | sig_type->per_cu.objfile = objfile; | |
2468 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2469 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2470 | struct dwarf2_per_cu_quick_data); | |
2471 | ||
52dc124a DE |
2472 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2473 | *slot = sig_type; | |
1fd400ff | 2474 | |
b4dd5633 | 2475 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2476 | } |
2477 | ||
673bfd45 | 2478 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2479 | } |
2480 | ||
9291a0cd TT |
2481 | /* Read the address map data from the mapped index, and use it to |
2482 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2483 | |
9291a0cd TT |
2484 | static void |
2485 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2486 | { | |
2487 | const gdb_byte *iter, *end; | |
2488 | struct obstack temp_obstack; | |
2489 | struct addrmap *mutable_map; | |
2490 | struct cleanup *cleanup; | |
2491 | CORE_ADDR baseaddr; | |
2492 | ||
2493 | obstack_init (&temp_obstack); | |
2494 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2495 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2496 | ||
2497 | iter = index->address_table; | |
2498 | end = iter + index->address_table_size; | |
2499 | ||
2500 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2501 | ||
2502 | while (iter < end) | |
2503 | { | |
2504 | ULONGEST hi, lo, cu_index; | |
2505 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2506 | iter += 8; | |
2507 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2508 | iter += 8; | |
2509 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2510 | iter += 4; | |
2511 | ||
2512 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
1fd400ff | 2513 | dw2_get_cu (cu_index)); |
9291a0cd TT |
2514 | } |
2515 | ||
2516 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2517 | &objfile->objfile_obstack); | |
2518 | do_cleanups (cleanup); | |
2519 | } | |
2520 | ||
59d7bcaf JK |
2521 | /* The hash function for strings in the mapped index. This is the same as |
2522 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2523 | implementation. This is necessary because the hash function is tied to the | |
2524 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2525 | SYMBOL_HASH_NEXT. |
2526 | ||
2527 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2528 | |
9291a0cd | 2529 | static hashval_t |
559a7a62 | 2530 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2531 | { |
2532 | const unsigned char *str = (const unsigned char *) p; | |
2533 | hashval_t r = 0; | |
2534 | unsigned char c; | |
2535 | ||
2536 | while ((c = *str++) != 0) | |
559a7a62 JK |
2537 | { |
2538 | if (index_version >= 5) | |
2539 | c = tolower (c); | |
2540 | r = r * 67 + c - 113; | |
2541 | } | |
9291a0cd TT |
2542 | |
2543 | return r; | |
2544 | } | |
2545 | ||
2546 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2547 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2548 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2549 | |
9291a0cd TT |
2550 | static int |
2551 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2552 | offset_type **vec_out) | |
2553 | { | |
0cf03b49 JK |
2554 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2555 | offset_type hash; | |
9291a0cd | 2556 | offset_type slot, step; |
559a7a62 | 2557 | int (*cmp) (const char *, const char *); |
9291a0cd | 2558 | |
0cf03b49 JK |
2559 | if (current_language->la_language == language_cplus |
2560 | || current_language->la_language == language_java | |
2561 | || current_language->la_language == language_fortran) | |
2562 | { | |
2563 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2564 | not contain any. */ | |
2565 | const char *paren = strchr (name, '('); | |
2566 | ||
2567 | if (paren) | |
2568 | { | |
2569 | char *dup; | |
2570 | ||
2571 | dup = xmalloc (paren - name + 1); | |
2572 | memcpy (dup, name, paren - name); | |
2573 | dup[paren - name] = 0; | |
2574 | ||
2575 | make_cleanup (xfree, dup); | |
2576 | name = dup; | |
2577 | } | |
2578 | } | |
2579 | ||
559a7a62 | 2580 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2581 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2582 | simulate our NAME being searched is also lowercased. */ |
2583 | hash = mapped_index_string_hash ((index->version == 4 | |
2584 | && case_sensitivity == case_sensitive_off | |
2585 | ? 5 : index->version), | |
2586 | name); | |
2587 | ||
3876f04e DE |
2588 | slot = hash & (index->symbol_table_slots - 1); |
2589 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2590 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2591 | |
2592 | for (;;) | |
2593 | { | |
2594 | /* Convert a slot number to an offset into the table. */ | |
2595 | offset_type i = 2 * slot; | |
2596 | const char *str; | |
3876f04e | 2597 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2598 | { |
2599 | do_cleanups (back_to); | |
2600 | return 0; | |
2601 | } | |
9291a0cd | 2602 | |
3876f04e | 2603 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2604 | if (!cmp (name, str)) |
9291a0cd TT |
2605 | { |
2606 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2607 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2608 | do_cleanups (back_to); |
9291a0cd TT |
2609 | return 1; |
2610 | } | |
2611 | ||
3876f04e | 2612 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2613 | } |
2614 | } | |
2615 | ||
2ec9a5e0 TT |
2616 | /* A helper function that reads the .gdb_index from SECTION and fills |
2617 | in MAP. FILENAME is the name of the file containing the section; | |
2618 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2619 | ok to use deprecated sections. | |
2620 | ||
2621 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2622 | out parameters that are filled in with information about the CU and | |
2623 | TU lists in the section. | |
2624 | ||
2625 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 2626 | |
9291a0cd | 2627 | static int |
2ec9a5e0 TT |
2628 | read_index_from_section (struct objfile *objfile, |
2629 | const char *filename, | |
2630 | int deprecated_ok, | |
2631 | struct dwarf2_section_info *section, | |
2632 | struct mapped_index *map, | |
2633 | const gdb_byte **cu_list, | |
2634 | offset_type *cu_list_elements, | |
2635 | const gdb_byte **types_list, | |
2636 | offset_type *types_list_elements) | |
9291a0cd | 2637 | { |
9291a0cd | 2638 | char *addr; |
2ec9a5e0 | 2639 | offset_type version; |
b3b272e1 | 2640 | offset_type *metadata; |
1fd400ff | 2641 | int i; |
9291a0cd | 2642 | |
2ec9a5e0 | 2643 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 2644 | return 0; |
82430852 JK |
2645 | |
2646 | /* Older elfutils strip versions could keep the section in the main | |
2647 | executable while splitting it for the separate debug info file. */ | |
2ec9a5e0 | 2648 | if ((bfd_get_file_flags (section->asection) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
2649 | return 0; |
2650 | ||
2ec9a5e0 | 2651 | dwarf2_read_section (objfile, section); |
9291a0cd | 2652 | |
2ec9a5e0 | 2653 | addr = section->buffer; |
9291a0cd | 2654 | /* Version check. */ |
1fd400ff | 2655 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2656 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2657 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2658 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2659 | indices. */ |
831adc1f | 2660 | if (version < 4) |
481860b3 GB |
2661 | { |
2662 | static int warning_printed = 0; | |
2663 | if (!warning_printed) | |
2664 | { | |
2665 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2666 | filename); |
481860b3 GB |
2667 | warning_printed = 1; |
2668 | } | |
2669 | return 0; | |
2670 | } | |
2671 | /* Index version 4 uses a different hash function than index version | |
2672 | 5 and later. | |
2673 | ||
2674 | Versions earlier than 6 did not emit psymbols for inlined | |
2675 | functions. Using these files will cause GDB not to be able to | |
2676 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2677 | indices unless the user has done |
2678 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2679 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2680 | { |
2681 | static int warning_printed = 0; | |
2682 | if (!warning_printed) | |
2683 | { | |
e615022a DE |
2684 | warning (_("\ |
2685 | Skipping deprecated .gdb_index section in %s.\n\ | |
2686 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2687 | to use the section anyway."), | |
2ec9a5e0 | 2688 | filename); |
481860b3 GB |
2689 | warning_printed = 1; |
2690 | } | |
2691 | return 0; | |
2692 | } | |
2693 | /* Indexes with higher version than the one supported by GDB may be no | |
594e8718 | 2694 | longer backward compatible. */ |
156942c7 | 2695 | if (version > 7) |
594e8718 | 2696 | return 0; |
9291a0cd | 2697 | |
559a7a62 | 2698 | map->version = version; |
2ec9a5e0 | 2699 | map->total_size = section->size; |
9291a0cd TT |
2700 | |
2701 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
2702 | |
2703 | i = 0; | |
2ec9a5e0 TT |
2704 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2705 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2706 | / 8); | |
1fd400ff TT |
2707 | ++i; |
2708 | ||
2ec9a5e0 TT |
2709 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2710 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2711 | - MAYBE_SWAP (metadata[i])) | |
2712 | / 8); | |
987d643c | 2713 | ++i; |
1fd400ff TT |
2714 | |
2715 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
2716 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
2717 | - MAYBE_SWAP (metadata[i])); | |
2718 | ++i; | |
2719 | ||
3876f04e DE |
2720 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
2721 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
2722 | - MAYBE_SWAP (metadata[i])) | |
2723 | / (2 * sizeof (offset_type))); | |
1fd400ff | 2724 | ++i; |
9291a0cd | 2725 | |
1fd400ff TT |
2726 | map->constant_pool = addr + MAYBE_SWAP (metadata[i]); |
2727 | ||
2ec9a5e0 TT |
2728 | return 1; |
2729 | } | |
2730 | ||
2731 | ||
2732 | /* Read the index file. If everything went ok, initialize the "quick" | |
2733 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
2734 | ||
2735 | static int | |
2736 | dwarf2_read_index (struct objfile *objfile) | |
2737 | { | |
2738 | struct mapped_index local_map, *map; | |
2739 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
2740 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
2741 | ||
2742 | if (!read_index_from_section (objfile, objfile->name, | |
2743 | use_deprecated_index_sections, | |
2744 | &dwarf2_per_objfile->gdb_index, &local_map, | |
2745 | &cu_list, &cu_list_elements, | |
2746 | &types_list, &types_list_elements)) | |
2747 | return 0; | |
2748 | ||
0fefef59 | 2749 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 2750 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
2751 | return 0; |
2752 | ||
2ec9a5e0 TT |
2753 | /* If there is a .dwz file, read it so we can get its CU list as |
2754 | well. */ | |
2755 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
2756 | { | |
2757 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
2758 | struct mapped_index dwz_map; | |
2759 | const gdb_byte *dwz_types_ignore; | |
2760 | offset_type dwz_types_elements_ignore; | |
2761 | ||
2762 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
2763 | 1, | |
2764 | &dwz->gdb_index, &dwz_map, | |
2765 | &dwz_list, &dwz_list_elements, | |
2766 | &dwz_types_ignore, | |
2767 | &dwz_types_elements_ignore)) | |
2768 | { | |
2769 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
2770 | bfd_get_filename (dwz->dwz_bfd)); | |
2771 | return 0; | |
2772 | } | |
2773 | } | |
2774 | ||
74a0d9f6 JK |
2775 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
2776 | dwz_list_elements); | |
1fd400ff | 2777 | |
8b70b953 TT |
2778 | if (types_list_elements) |
2779 | { | |
2780 | struct dwarf2_section_info *section; | |
2781 | ||
2782 | /* We can only handle a single .debug_types when we have an | |
2783 | index. */ | |
2784 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
2785 | return 0; | |
2786 | ||
2787 | section = VEC_index (dwarf2_section_info_def, | |
2788 | dwarf2_per_objfile->types, 0); | |
2789 | ||
74a0d9f6 JK |
2790 | create_signatured_type_table_from_index (objfile, section, types_list, |
2791 | types_list_elements); | |
8b70b953 | 2792 | } |
9291a0cd | 2793 | |
2ec9a5e0 TT |
2794 | create_addrmap_from_index (objfile, &local_map); |
2795 | ||
2796 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
2797 | *map = local_map; | |
9291a0cd TT |
2798 | |
2799 | dwarf2_per_objfile->index_table = map; | |
2800 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
2801 | dwarf2_per_objfile->quick_file_names_table = |
2802 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
2803 | |
2804 | return 1; | |
2805 | } | |
2806 | ||
2807 | /* A helper for the "quick" functions which sets the global | |
2808 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 2809 | |
9291a0cd TT |
2810 | static void |
2811 | dw2_setup (struct objfile *objfile) | |
2812 | { | |
2813 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
2814 | gdb_assert (dwarf2_per_objfile); | |
2815 | } | |
2816 | ||
f4dc4d17 DE |
2817 | /* Reader function for dw2_build_type_unit_groups. */ |
2818 | ||
2819 | static void | |
2820 | dw2_build_type_unit_groups_reader (const struct die_reader_specs *reader, | |
2821 | gdb_byte *info_ptr, | |
2822 | struct die_info *type_unit_die, | |
2823 | int has_children, | |
2824 | void *data) | |
2825 | { | |
2826 | struct dwarf2_cu *cu = reader->cu; | |
f4dc4d17 DE |
2827 | struct attribute *attr; |
2828 | struct type_unit_group *tu_group; | |
2829 | ||
2830 | gdb_assert (data == NULL); | |
2831 | ||
2832 | if (! has_children) | |
2833 | return; | |
2834 | ||
2835 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
2836 | /* Call this for its side-effect of creating the associated | |
2837 | struct type_unit_group if it doesn't already exist. */ | |
094b34ac | 2838 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 DE |
2839 | } |
2840 | ||
2841 | /* Build dwarf2_per_objfile->type_unit_groups. | |
2842 | This function may be called multiple times. */ | |
2843 | ||
2844 | static void | |
2845 | dw2_build_type_unit_groups (void) | |
2846 | { | |
2847 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
2848 | build_type_unit_groups (dw2_build_type_unit_groups_reader, NULL); | |
2849 | } | |
2850 | ||
dee91e82 | 2851 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 2852 | |
dee91e82 DE |
2853 | static void |
2854 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
2855 | gdb_byte *info_ptr, | |
2856 | struct die_info *comp_unit_die, | |
2857 | int has_children, | |
2858 | void *data) | |
9291a0cd | 2859 | { |
dee91e82 DE |
2860 | struct dwarf2_cu *cu = reader->cu; |
2861 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
2862 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 2863 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 2864 | struct line_header *lh; |
9291a0cd | 2865 | struct attribute *attr; |
dee91e82 | 2866 | int i; |
9291a0cd | 2867 | char *name, *comp_dir; |
7b9f3c50 DE |
2868 | void **slot; |
2869 | struct quick_file_names *qfn; | |
2870 | unsigned int line_offset; | |
9291a0cd | 2871 | |
07261596 TT |
2872 | /* Our callers never want to match partial units -- instead they |
2873 | will match the enclosing full CU. */ | |
2874 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
2875 | { | |
2876 | this_cu->v.quick->no_file_data = 1; | |
2877 | return; | |
2878 | } | |
2879 | ||
094b34ac DE |
2880 | /* If we're reading the line header for TUs, store it in the "per_cu" |
2881 | for tu_group. */ | |
2882 | if (this_cu->is_debug_types) | |
2883 | { | |
2884 | struct type_unit_group *tu_group = data; | |
2885 | ||
2886 | gdb_assert (tu_group != NULL); | |
2887 | lh_cu = &tu_group->per_cu; | |
2888 | } | |
2889 | else | |
2890 | lh_cu = this_cu; | |
2891 | ||
7b9f3c50 DE |
2892 | lh = NULL; |
2893 | slot = NULL; | |
2894 | line_offset = 0; | |
dee91e82 DE |
2895 | |
2896 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
2897 | if (attr) |
2898 | { | |
7b9f3c50 DE |
2899 | struct quick_file_names find_entry; |
2900 | ||
2901 | line_offset = DW_UNSND (attr); | |
2902 | ||
2903 | /* We may have already read in this line header (TU line header sharing). | |
2904 | If we have we're done. */ | |
094b34ac DE |
2905 | find_entry.hash.dwo_unit = cu->dwo_unit; |
2906 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2907 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
2908 | &find_entry, INSERT); | |
2909 | if (*slot != NULL) | |
2910 | { | |
094b34ac | 2911 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 2912 | return; |
7b9f3c50 DE |
2913 | } |
2914 | ||
3019eac3 | 2915 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
2916 | } |
2917 | if (lh == NULL) | |
2918 | { | |
094b34ac | 2919 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 2920 | return; |
9291a0cd TT |
2921 | } |
2922 | ||
7b9f3c50 | 2923 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
2924 | qfn->hash.dwo_unit = cu->dwo_unit; |
2925 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2926 | gdb_assert (slot != NULL); |
2927 | *slot = qfn; | |
9291a0cd | 2928 | |
dee91e82 | 2929 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 2930 | |
7b9f3c50 DE |
2931 | qfn->num_file_names = lh->num_file_names; |
2932 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
2933 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 2934 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
2935 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
2936 | qfn->real_names = NULL; | |
9291a0cd | 2937 | |
7b9f3c50 | 2938 | free_line_header (lh); |
7b9f3c50 | 2939 | |
094b34ac | 2940 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
2941 | } |
2942 | ||
2943 | /* A helper for the "quick" functions which attempts to read the line | |
2944 | table for THIS_CU. */ | |
2945 | ||
2946 | static struct quick_file_names * | |
2947 | dw2_get_file_names (struct objfile *objfile, | |
2948 | struct dwarf2_per_cu_data *this_cu) | |
2949 | { | |
f4dc4d17 DE |
2950 | /* For TUs this should only be called on the parent group. */ |
2951 | if (this_cu->is_debug_types) | |
2952 | gdb_assert (IS_TYPE_UNIT_GROUP (this_cu)); | |
2953 | ||
dee91e82 DE |
2954 | if (this_cu->v.quick->file_names != NULL) |
2955 | return this_cu->v.quick->file_names; | |
2956 | /* If we know there is no line data, no point in looking again. */ | |
2957 | if (this_cu->v.quick->no_file_data) | |
2958 | return NULL; | |
2959 | ||
3019eac3 DE |
2960 | /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute |
2961 | in the stub for CUs, there's is no need to lookup the DWO file. | |
2962 | However, that's not the case for TUs where DW_AT_stmt_list lives in the | |
2963 | DWO file. */ | |
2964 | if (this_cu->is_debug_types) | |
094b34ac DE |
2965 | { |
2966 | struct type_unit_group *tu_group = this_cu->s.type_unit_group; | |
2967 | ||
2968 | init_cutu_and_read_dies (tu_group->t.first_tu, NULL, 0, 0, | |
2969 | dw2_get_file_names_reader, tu_group); | |
2970 | } | |
3019eac3 DE |
2971 | else |
2972 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); | |
dee91e82 DE |
2973 | |
2974 | if (this_cu->v.quick->no_file_data) | |
2975 | return NULL; | |
2976 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
2977 | } |
2978 | ||
2979 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 2980 | real path for a given file name from the line table. */ |
2fdf6df6 | 2981 | |
9291a0cd | 2982 | static const char * |
7b9f3c50 DE |
2983 | dw2_get_real_path (struct objfile *objfile, |
2984 | struct quick_file_names *qfn, int index) | |
9291a0cd | 2985 | { |
7b9f3c50 DE |
2986 | if (qfn->real_names == NULL) |
2987 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
2988 | qfn->num_file_names, sizeof (char *)); | |
9291a0cd | 2989 | |
7b9f3c50 DE |
2990 | if (qfn->real_names[index] == NULL) |
2991 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 2992 | |
7b9f3c50 | 2993 | return qfn->real_names[index]; |
9291a0cd TT |
2994 | } |
2995 | ||
2996 | static struct symtab * | |
2997 | dw2_find_last_source_symtab (struct objfile *objfile) | |
2998 | { | |
2999 | int index; | |
ae2de4f8 | 3000 | |
9291a0cd TT |
3001 | dw2_setup (objfile); |
3002 | index = dwarf2_per_objfile->n_comp_units - 1; | |
a0f42c21 | 3003 | return dw2_instantiate_symtab (dw2_get_cu (index)); |
9291a0cd TT |
3004 | } |
3005 | ||
7b9f3c50 DE |
3006 | /* Traversal function for dw2_forget_cached_source_info. */ |
3007 | ||
3008 | static int | |
3009 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3010 | { |
7b9f3c50 | 3011 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3012 | |
7b9f3c50 | 3013 | if (file_data->real_names) |
9291a0cd | 3014 | { |
7b9f3c50 | 3015 | int i; |
9291a0cd | 3016 | |
7b9f3c50 | 3017 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3018 | { |
7b9f3c50 DE |
3019 | xfree ((void*) file_data->real_names[i]); |
3020 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3021 | } |
3022 | } | |
7b9f3c50 DE |
3023 | |
3024 | return 1; | |
3025 | } | |
3026 | ||
3027 | static void | |
3028 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3029 | { | |
3030 | dw2_setup (objfile); | |
3031 | ||
3032 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3033 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3034 | } |
3035 | ||
f8eba3c6 TT |
3036 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3037 | the symtabs and calls the iterator. */ | |
3038 | ||
3039 | static int | |
3040 | dw2_map_expand_apply (struct objfile *objfile, | |
3041 | struct dwarf2_per_cu_data *per_cu, | |
3042 | const char *name, | |
3043 | const char *full_path, const char *real_path, | |
3044 | int (*callback) (struct symtab *, void *), | |
3045 | void *data) | |
3046 | { | |
3047 | struct symtab *last_made = objfile->symtabs; | |
3048 | ||
3049 | /* Don't visit already-expanded CUs. */ | |
3050 | if (per_cu->v.quick->symtab) | |
3051 | return 0; | |
3052 | ||
3053 | /* This may expand more than one symtab, and we want to iterate over | |
3054 | all of them. */ | |
a0f42c21 | 3055 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 TT |
3056 | |
3057 | return iterate_over_some_symtabs (name, full_path, real_path, callback, data, | |
3058 | objfile->symtabs, last_made); | |
3059 | } | |
3060 | ||
3061 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3062 | ||
9291a0cd | 3063 | static int |
f8eba3c6 TT |
3064 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
3065 | const char *full_path, const char *real_path, | |
3066 | int (*callback) (struct symtab *, void *), | |
3067 | void *data) | |
9291a0cd TT |
3068 | { |
3069 | int i; | |
c011a4f4 | 3070 | const char *name_basename = lbasename (name); |
4aac40c8 | 3071 | int is_abs = IS_ABSOLUTE_PATH (name); |
9291a0cd TT |
3072 | |
3073 | dw2_setup (objfile); | |
ae2de4f8 | 3074 | |
f4dc4d17 DE |
3075 | dw2_build_type_unit_groups (); |
3076 | ||
1fd400ff | 3077 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
f4dc4d17 | 3078 | + dwarf2_per_objfile->n_type_unit_groups); ++i) |
9291a0cd TT |
3079 | { |
3080 | int j; | |
f4dc4d17 | 3081 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3082 | struct quick_file_names *file_data; |
9291a0cd | 3083 | |
3d7bb9d9 | 3084 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3085 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3086 | continue; |
3087 | ||
7b9f3c50 DE |
3088 | file_data = dw2_get_file_names (objfile, per_cu); |
3089 | if (file_data == NULL) | |
9291a0cd TT |
3090 | continue; |
3091 | ||
7b9f3c50 | 3092 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3093 | { |
7b9f3c50 | 3094 | const char *this_name = file_data->file_names[j]; |
9291a0cd | 3095 | |
4aac40c8 | 3096 | if (FILENAME_CMP (name, this_name) == 0 |
b57a636e | 3097 | || (!is_abs && compare_filenames_for_search (this_name, name))) |
9291a0cd | 3098 | { |
f8eba3c6 TT |
3099 | if (dw2_map_expand_apply (objfile, per_cu, |
3100 | name, full_path, real_path, | |
3101 | callback, data)) | |
3102 | return 1; | |
4aac40c8 | 3103 | } |
9291a0cd | 3104 | |
c011a4f4 DE |
3105 | /* Before we invoke realpath, which can get expensive when many |
3106 | files are involved, do a quick comparison of the basenames. */ | |
3107 | if (! basenames_may_differ | |
3108 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3109 | continue; | |
3110 | ||
9291a0cd TT |
3111 | if (full_path != NULL) |
3112 | { | |
7b9f3c50 DE |
3113 | const char *this_real_name = dw2_get_real_path (objfile, |
3114 | file_data, j); | |
9291a0cd | 3115 | |
7b9f3c50 | 3116 | if (this_real_name != NULL |
4aac40c8 TT |
3117 | && (FILENAME_CMP (full_path, this_real_name) == 0 |
3118 | || (!is_abs | |
3119 | && compare_filenames_for_search (this_real_name, | |
b57a636e | 3120 | name)))) |
9291a0cd | 3121 | { |
f8eba3c6 TT |
3122 | if (dw2_map_expand_apply (objfile, per_cu, |
3123 | name, full_path, real_path, | |
3124 | callback, data)) | |
3125 | return 1; | |
9291a0cd TT |
3126 | } |
3127 | } | |
3128 | ||
3129 | if (real_path != NULL) | |
3130 | { | |
7b9f3c50 DE |
3131 | const char *this_real_name = dw2_get_real_path (objfile, |
3132 | file_data, j); | |
9291a0cd | 3133 | |
7b9f3c50 | 3134 | if (this_real_name != NULL |
4aac40c8 TT |
3135 | && (FILENAME_CMP (real_path, this_real_name) == 0 |
3136 | || (!is_abs | |
3137 | && compare_filenames_for_search (this_real_name, | |
b57a636e | 3138 | name)))) |
9291a0cd | 3139 | { |
f8eba3c6 TT |
3140 | if (dw2_map_expand_apply (objfile, per_cu, |
3141 | name, full_path, real_path, | |
3142 | callback, data)) | |
3143 | return 1; | |
9291a0cd TT |
3144 | } |
3145 | } | |
3146 | } | |
3147 | } | |
3148 | ||
9291a0cd TT |
3149 | return 0; |
3150 | } | |
3151 | ||
3152 | static struct symtab * | |
3153 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3154 | const char *name, domain_enum domain) | |
3155 | { | |
774b6a14 | 3156 | /* We do all the work in the pre_expand_symtabs_matching hook |
9291a0cd TT |
3157 | instead. */ |
3158 | return NULL; | |
3159 | } | |
3160 | ||
3161 | /* A helper function that expands all symtabs that hold an object | |
156942c7 DE |
3162 | named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for |
3163 | symbols in block BLOCK_KIND. */ | |
2fdf6df6 | 3164 | |
9291a0cd | 3165 | static void |
156942c7 DE |
3166 | dw2_do_expand_symtabs_matching (struct objfile *objfile, |
3167 | int want_specific_block, | |
3168 | enum block_enum block_kind, | |
3169 | const char *name, domain_enum domain) | |
9291a0cd | 3170 | { |
156942c7 DE |
3171 | struct mapped_index *index; |
3172 | ||
9291a0cd TT |
3173 | dw2_setup (objfile); |
3174 | ||
156942c7 DE |
3175 | index = dwarf2_per_objfile->index_table; |
3176 | ||
ae2de4f8 | 3177 | /* index_table is NULL if OBJF_READNOW. */ |
156942c7 | 3178 | if (index) |
9291a0cd TT |
3179 | { |
3180 | offset_type *vec; | |
3181 | ||
156942c7 | 3182 | if (find_slot_in_mapped_hash (index, name, &vec)) |
9291a0cd TT |
3183 | { |
3184 | offset_type i, len = MAYBE_SWAP (*vec); | |
3185 | for (i = 0; i < len; ++i) | |
3186 | { | |
156942c7 DE |
3187 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[i + 1]); |
3188 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
e254ef6a | 3189 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index); |
156942c7 DE |
3190 | int want_static = block_kind != GLOBAL_BLOCK; |
3191 | /* This value is only valid for index versions >= 7. */ | |
3192 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3193 | gdb_index_symbol_kind symbol_kind = | |
3194 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
83a788b8 DE |
3195 | /* Only check the symbol attributes if they're present. |
3196 | Indices prior to version 7 don't record them, | |
3197 | and indices >= 7 may elide them for certain symbols | |
3198 | (gold does this). */ | |
3199 | int attrs_valid = | |
3200 | (index->version >= 7 | |
3201 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3202 | ||
3203 | if (attrs_valid | |
3204 | && want_specific_block | |
156942c7 DE |
3205 | && want_static != is_static) |
3206 | continue; | |
3207 | ||
83a788b8 DE |
3208 | /* Only check the symbol's kind if it has one. */ |
3209 | if (attrs_valid) | |
156942c7 DE |
3210 | { |
3211 | switch (domain) | |
3212 | { | |
3213 | case VAR_DOMAIN: | |
3214 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3215 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3216 | /* Some types are also in VAR_DOMAIN. */ | |
3217 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3218 | continue; | |
3219 | break; | |
3220 | case STRUCT_DOMAIN: | |
3221 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3222 | continue; | |
3223 | break; | |
3224 | case LABEL_DOMAIN: | |
3225 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3226 | continue; | |
3227 | break; | |
3228 | default: | |
3229 | break; | |
3230 | } | |
3231 | } | |
1fd400ff | 3232 | |
a0f42c21 | 3233 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3234 | } |
3235 | } | |
3236 | } | |
3237 | } | |
3238 | ||
774b6a14 TT |
3239 | static void |
3240 | dw2_pre_expand_symtabs_matching (struct objfile *objfile, | |
8903c50d | 3241 | enum block_enum block_kind, const char *name, |
774b6a14 | 3242 | domain_enum domain) |
9291a0cd | 3243 | { |
156942c7 | 3244 | dw2_do_expand_symtabs_matching (objfile, 1, block_kind, name, domain); |
9291a0cd TT |
3245 | } |
3246 | ||
3247 | static void | |
3248 | dw2_print_stats (struct objfile *objfile) | |
3249 | { | |
3250 | int i, count; | |
3251 | ||
3252 | dw2_setup (objfile); | |
3253 | count = 0; | |
1fd400ff | 3254 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 3255 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3256 | { |
e254ef6a | 3257 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3258 | |
e254ef6a | 3259 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3260 | ++count; |
3261 | } | |
3262 | printf_filtered (_(" Number of unread CUs: %d\n"), count); | |
3263 | } | |
3264 | ||
3265 | static void | |
3266 | dw2_dump (struct objfile *objfile) | |
3267 | { | |
3268 | /* Nothing worth printing. */ | |
3269 | } | |
3270 | ||
3271 | static void | |
3272 | dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets, | |
3273 | struct section_offsets *delta) | |
3274 | { | |
3275 | /* There's nothing to relocate here. */ | |
3276 | } | |
3277 | ||
3278 | static void | |
3279 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3280 | const char *func_name) | |
3281 | { | |
156942c7 DE |
3282 | /* Note: It doesn't matter what we pass for block_kind here. */ |
3283 | dw2_do_expand_symtabs_matching (objfile, 0, GLOBAL_BLOCK, func_name, | |
3284 | VAR_DOMAIN); | |
9291a0cd TT |
3285 | } |
3286 | ||
3287 | static void | |
3288 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3289 | { | |
3290 | int i; | |
3291 | ||
3292 | dw2_setup (objfile); | |
1fd400ff TT |
3293 | |
3294 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3295 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3296 | { |
e254ef6a | 3297 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3298 | |
a0f42c21 | 3299 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3300 | } |
3301 | } | |
3302 | ||
3303 | static void | |
3304 | dw2_expand_symtabs_with_filename (struct objfile *objfile, | |
3305 | const char *filename) | |
3306 | { | |
3307 | int i; | |
3308 | ||
3309 | dw2_setup (objfile); | |
d4637a04 DE |
3310 | |
3311 | /* We don't need to consider type units here. | |
3312 | This is only called for examining code, e.g. expand_line_sal. | |
3313 | There can be an order of magnitude (or more) more type units | |
3314 | than comp units, and we avoid them if we can. */ | |
3315 | ||
3316 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3317 | { |
3318 | int j; | |
e254ef6a | 3319 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3320 | struct quick_file_names *file_data; |
9291a0cd | 3321 | |
3d7bb9d9 | 3322 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3323 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3324 | continue; |
3325 | ||
7b9f3c50 DE |
3326 | file_data = dw2_get_file_names (objfile, per_cu); |
3327 | if (file_data == NULL) | |
9291a0cd TT |
3328 | continue; |
3329 | ||
7b9f3c50 | 3330 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3331 | { |
7b9f3c50 | 3332 | const char *this_name = file_data->file_names[j]; |
1ef75ecc | 3333 | if (FILENAME_CMP (this_name, filename) == 0) |
9291a0cd | 3334 | { |
a0f42c21 | 3335 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3336 | break; |
3337 | } | |
3338 | } | |
3339 | } | |
3340 | } | |
3341 | ||
356d9f9d TT |
3342 | /* A helper function for dw2_find_symbol_file that finds the primary |
3343 | file name for a given CU. This is a die_reader_func. */ | |
3344 | ||
3345 | static void | |
3346 | dw2_get_primary_filename_reader (const struct die_reader_specs *reader, | |
3347 | gdb_byte *info_ptr, | |
3348 | struct die_info *comp_unit_die, | |
3349 | int has_children, | |
3350 | void *data) | |
3351 | { | |
3352 | const char **result_ptr = data; | |
3353 | struct dwarf2_cu *cu = reader->cu; | |
3354 | struct attribute *attr; | |
3355 | ||
3356 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
3357 | if (attr == NULL) | |
3358 | *result_ptr = NULL; | |
3359 | else | |
3360 | *result_ptr = DW_STRING (attr); | |
3361 | } | |
3362 | ||
dd786858 | 3363 | static const char * |
9291a0cd TT |
3364 | dw2_find_symbol_file (struct objfile *objfile, const char *name) |
3365 | { | |
e254ef6a | 3366 | struct dwarf2_per_cu_data *per_cu; |
9291a0cd | 3367 | offset_type *vec; |
356d9f9d | 3368 | const char *filename; |
9291a0cd TT |
3369 | |
3370 | dw2_setup (objfile); | |
3371 | ||
ae2de4f8 | 3372 | /* index_table is NULL if OBJF_READNOW. */ |
9291a0cd | 3373 | if (!dwarf2_per_objfile->index_table) |
96408a79 SA |
3374 | { |
3375 | struct symtab *s; | |
3376 | ||
d790cf0a DE |
3377 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
3378 | { | |
3379 | struct blockvector *bv = BLOCKVECTOR (s); | |
3380 | const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); | |
3381 | struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN); | |
3382 | ||
3383 | if (sym) | |
210bbc17 | 3384 | return SYMBOL_SYMTAB (sym)->filename; |
d790cf0a | 3385 | } |
96408a79 SA |
3386 | return NULL; |
3387 | } | |
9291a0cd TT |
3388 | |
3389 | if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table, | |
3390 | name, &vec)) | |
3391 | return NULL; | |
3392 | ||
3393 | /* Note that this just looks at the very first one named NAME -- but | |
3394 | actually we are looking for a function. find_main_filename | |
3395 | should be rewritten so that it doesn't require a custom hook. It | |
3396 | could just use the ordinary symbol tables. */ | |
3397 | /* vec[0] is the length, which must always be >0. */ | |
156942c7 | 3398 | per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1]))); |
9291a0cd | 3399 | |
356d9f9d TT |
3400 | if (per_cu->v.quick->symtab != NULL) |
3401 | return per_cu->v.quick->symtab->filename; | |
3402 | ||
f4dc4d17 DE |
3403 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, |
3404 | dw2_get_primary_filename_reader, &filename); | |
9291a0cd | 3405 | |
356d9f9d | 3406 | return filename; |
9291a0cd TT |
3407 | } |
3408 | ||
3409 | static void | |
40658b94 PH |
3410 | dw2_map_matching_symbols (const char * name, domain_enum namespace, |
3411 | struct objfile *objfile, int global, | |
3412 | int (*callback) (struct block *, | |
3413 | struct symbol *, void *), | |
2edb89d3 JK |
3414 | void *data, symbol_compare_ftype *match, |
3415 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3416 | { |
40658b94 | 3417 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3418 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3419 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3420 | } |
3421 | ||
3422 | static void | |
f8eba3c6 TT |
3423 | dw2_expand_symtabs_matching |
3424 | (struct objfile *objfile, | |
3425 | int (*file_matcher) (const char *, void *), | |
e078317b | 3426 | int (*name_matcher) (const char *, void *), |
f8eba3c6 TT |
3427 | enum search_domain kind, |
3428 | void *data) | |
9291a0cd TT |
3429 | { |
3430 | int i; | |
3431 | offset_type iter; | |
4b5246aa | 3432 | struct mapped_index *index; |
9291a0cd TT |
3433 | |
3434 | dw2_setup (objfile); | |
ae2de4f8 DE |
3435 | |
3436 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3437 | if (!dwarf2_per_objfile->index_table) |
3438 | return; | |
4b5246aa | 3439 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3440 | |
7b08b9eb | 3441 | if (file_matcher != NULL) |
24c79950 TT |
3442 | { |
3443 | struct cleanup *cleanup; | |
3444 | htab_t visited_found, visited_not_found; | |
3445 | ||
f4dc4d17 DE |
3446 | dw2_build_type_unit_groups (); |
3447 | ||
24c79950 TT |
3448 | visited_found = htab_create_alloc (10, |
3449 | htab_hash_pointer, htab_eq_pointer, | |
3450 | NULL, xcalloc, xfree); | |
3451 | cleanup = make_cleanup_htab_delete (visited_found); | |
3452 | visited_not_found = htab_create_alloc (10, | |
3453 | htab_hash_pointer, htab_eq_pointer, | |
3454 | NULL, xcalloc, xfree); | |
3455 | make_cleanup_htab_delete (visited_not_found); | |
3456 | ||
3457 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
f4dc4d17 | 3458 | + dwarf2_per_objfile->n_type_unit_groups); ++i) |
24c79950 TT |
3459 | { |
3460 | int j; | |
f4dc4d17 | 3461 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
24c79950 TT |
3462 | struct quick_file_names *file_data; |
3463 | void **slot; | |
7b08b9eb | 3464 | |
24c79950 | 3465 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3466 | |
24c79950 TT |
3467 | /* We only need to look at symtabs not already expanded. */ |
3468 | if (per_cu->v.quick->symtab) | |
3469 | continue; | |
7b08b9eb | 3470 | |
24c79950 TT |
3471 | file_data = dw2_get_file_names (objfile, per_cu); |
3472 | if (file_data == NULL) | |
3473 | continue; | |
7b08b9eb | 3474 | |
24c79950 TT |
3475 | if (htab_find (visited_not_found, file_data) != NULL) |
3476 | continue; | |
3477 | else if (htab_find (visited_found, file_data) != NULL) | |
3478 | { | |
3479 | per_cu->v.quick->mark = 1; | |
3480 | continue; | |
3481 | } | |
3482 | ||
3483 | for (j = 0; j < file_data->num_file_names; ++j) | |
3484 | { | |
3485 | if (file_matcher (file_data->file_names[j], data)) | |
3486 | { | |
3487 | per_cu->v.quick->mark = 1; | |
3488 | break; | |
3489 | } | |
3490 | } | |
3491 | ||
3492 | slot = htab_find_slot (per_cu->v.quick->mark | |
3493 | ? visited_found | |
3494 | : visited_not_found, | |
3495 | file_data, INSERT); | |
3496 | *slot = file_data; | |
3497 | } | |
3498 | ||
3499 | do_cleanups (cleanup); | |
3500 | } | |
9291a0cd | 3501 | |
3876f04e | 3502 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3503 | { |
3504 | offset_type idx = 2 * iter; | |
3505 | const char *name; | |
3506 | offset_type *vec, vec_len, vec_idx; | |
3507 | ||
3876f04e | 3508 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3509 | continue; |
3510 | ||
3876f04e | 3511 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3512 | |
e078317b | 3513 | if (! (*name_matcher) (name, data)) |
9291a0cd TT |
3514 | continue; |
3515 | ||
3516 | /* The name was matched, now expand corresponding CUs that were | |
3517 | marked. */ | |
4b5246aa | 3518 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3519 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3520 | vec_len = MAYBE_SWAP (vec[0]); |
3521 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3522 | { | |
e254ef6a | 3523 | struct dwarf2_per_cu_data *per_cu; |
156942c7 DE |
3524 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
3525 | gdb_index_symbol_kind symbol_kind = | |
3526 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3527 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3528 | ||
3529 | /* Don't crash on bad data. */ | |
3530 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
667e0a4b | 3531 | + dwarf2_per_objfile->n_type_units)) |
156942c7 | 3532 | continue; |
1fd400ff | 3533 | |
156942c7 DE |
3534 | /* Only check the symbol's kind if it has one. |
3535 | Indices prior to version 7 don't record it. */ | |
3536 | if (index->version >= 7) | |
3537 | { | |
3538 | switch (kind) | |
3539 | { | |
3540 | case VARIABLES_DOMAIN: | |
3541 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3542 | continue; | |
3543 | break; | |
3544 | case FUNCTIONS_DOMAIN: | |
3545 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3546 | continue; | |
3547 | break; | |
3548 | case TYPES_DOMAIN: | |
3549 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3550 | continue; | |
3551 | break; | |
3552 | default: | |
3553 | break; | |
3554 | } | |
3555 | } | |
3556 | ||
3557 | per_cu = dw2_get_cu (cu_index); | |
7b08b9eb | 3558 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3559 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3560 | } |
3561 | } | |
3562 | } | |
3563 | ||
9703b513 TT |
3564 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3565 | symtab. */ | |
3566 | ||
3567 | static struct symtab * | |
3568 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3569 | { | |
3570 | int i; | |
3571 | ||
3572 | if (BLOCKVECTOR (symtab) != NULL | |
3573 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3574 | return symtab; | |
3575 | ||
a3ec0bb1 DE |
3576 | if (symtab->includes == NULL) |
3577 | return NULL; | |
3578 | ||
9703b513 TT |
3579 | for (i = 0; symtab->includes[i]; ++i) |
3580 | { | |
a3ec0bb1 | 3581 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
3582 | |
3583 | s = recursively_find_pc_sect_symtab (s, pc); | |
3584 | if (s != NULL) | |
3585 | return s; | |
3586 | } | |
3587 | ||
3588 | return NULL; | |
3589 | } | |
3590 | ||
9291a0cd TT |
3591 | static struct symtab * |
3592 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
3593 | struct minimal_symbol *msymbol, | |
3594 | CORE_ADDR pc, | |
3595 | struct obj_section *section, | |
3596 | int warn_if_readin) | |
3597 | { | |
3598 | struct dwarf2_per_cu_data *data; | |
9703b513 | 3599 | struct symtab *result; |
9291a0cd TT |
3600 | |
3601 | dw2_setup (objfile); | |
3602 | ||
3603 | if (!objfile->psymtabs_addrmap) | |
3604 | return NULL; | |
3605 | ||
3606 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
3607 | if (!data) | |
3608 | return NULL; | |
3609 | ||
3610 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 3611 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
3612 | paddress (get_objfile_arch (objfile), pc)); |
3613 | ||
9703b513 TT |
3614 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
3615 | gdb_assert (result != NULL); | |
3616 | return result; | |
9291a0cd TT |
3617 | } |
3618 | ||
9291a0cd | 3619 | static void |
44b13c5a | 3620 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 3621 | void *data, int need_fullname) |
9291a0cd TT |
3622 | { |
3623 | int i; | |
24c79950 TT |
3624 | struct cleanup *cleanup; |
3625 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
3626 | NULL, xcalloc, xfree); | |
9291a0cd | 3627 | |
24c79950 | 3628 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 3629 | dw2_setup (objfile); |
ae2de4f8 | 3630 | |
f4dc4d17 DE |
3631 | dw2_build_type_unit_groups (); |
3632 | ||
24c79950 TT |
3633 | /* We can ignore file names coming from already-expanded CUs. */ |
3634 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
3635 | + dwarf2_per_objfile->n_type_units); ++i) | |
3636 | { | |
3637 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
3638 | ||
3639 | if (per_cu->v.quick->symtab) | |
3640 | { | |
3641 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
3642 | INSERT); | |
3643 | ||
3644 | *slot = per_cu->v.quick->file_names; | |
3645 | } | |
3646 | } | |
3647 | ||
1fd400ff | 3648 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
f4dc4d17 | 3649 | + dwarf2_per_objfile->n_type_unit_groups); ++i) |
9291a0cd TT |
3650 | { |
3651 | int j; | |
f4dc4d17 | 3652 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3653 | struct quick_file_names *file_data; |
24c79950 | 3654 | void **slot; |
9291a0cd | 3655 | |
3d7bb9d9 | 3656 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3657 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3658 | continue; |
3659 | ||
7b9f3c50 DE |
3660 | file_data = dw2_get_file_names (objfile, per_cu); |
3661 | if (file_data == NULL) | |
9291a0cd TT |
3662 | continue; |
3663 | ||
24c79950 TT |
3664 | slot = htab_find_slot (visited, file_data, INSERT); |
3665 | if (*slot) | |
3666 | { | |
3667 | /* Already visited. */ | |
3668 | continue; | |
3669 | } | |
3670 | *slot = file_data; | |
3671 | ||
7b9f3c50 | 3672 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3673 | { |
74e2f255 DE |
3674 | const char *this_real_name; |
3675 | ||
3676 | if (need_fullname) | |
3677 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3678 | else | |
3679 | this_real_name = NULL; | |
7b9f3c50 | 3680 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
3681 | } |
3682 | } | |
24c79950 TT |
3683 | |
3684 | do_cleanups (cleanup); | |
9291a0cd TT |
3685 | } |
3686 | ||
3687 | static int | |
3688 | dw2_has_symbols (struct objfile *objfile) | |
3689 | { | |
3690 | return 1; | |
3691 | } | |
3692 | ||
3693 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
3694 | { | |
3695 | dw2_has_symbols, | |
3696 | dw2_find_last_source_symtab, | |
3697 | dw2_forget_cached_source_info, | |
f8eba3c6 | 3698 | dw2_map_symtabs_matching_filename, |
9291a0cd | 3699 | dw2_lookup_symbol, |
774b6a14 | 3700 | dw2_pre_expand_symtabs_matching, |
9291a0cd TT |
3701 | dw2_print_stats, |
3702 | dw2_dump, | |
3703 | dw2_relocate, | |
3704 | dw2_expand_symtabs_for_function, | |
3705 | dw2_expand_all_symtabs, | |
3706 | dw2_expand_symtabs_with_filename, | |
3707 | dw2_find_symbol_file, | |
40658b94 | 3708 | dw2_map_matching_symbols, |
9291a0cd TT |
3709 | dw2_expand_symtabs_matching, |
3710 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
3711 | dw2_map_symbol_filenames |
3712 | }; | |
3713 | ||
3714 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
3715 | file will use psymtabs, or 1 if using the GNU index. */ | |
3716 | ||
3717 | int | |
3718 | dwarf2_initialize_objfile (struct objfile *objfile) | |
3719 | { | |
3720 | /* If we're about to read full symbols, don't bother with the | |
3721 | indices. In this case we also don't care if some other debug | |
3722 | format is making psymtabs, because they are all about to be | |
3723 | expanded anyway. */ | |
3724 | if ((objfile->flags & OBJF_READNOW)) | |
3725 | { | |
3726 | int i; | |
3727 | ||
3728 | dwarf2_per_objfile->using_index = 1; | |
3729 | create_all_comp_units (objfile); | |
0e50663e | 3730 | create_all_type_units (objfile); |
7b9f3c50 DE |
3731 | dwarf2_per_objfile->quick_file_names_table = |
3732 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 3733 | |
1fd400ff | 3734 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 3735 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3736 | { |
e254ef6a | 3737 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3738 | |
e254ef6a DE |
3739 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3740 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
3741 | } |
3742 | ||
3743 | /* Return 1 so that gdb sees the "quick" functions. However, | |
3744 | these functions will be no-ops because we will have expanded | |
3745 | all symtabs. */ | |
3746 | return 1; | |
3747 | } | |
3748 | ||
3749 | if (dwarf2_read_index (objfile)) | |
3750 | return 1; | |
3751 | ||
9291a0cd TT |
3752 | return 0; |
3753 | } | |
3754 | ||
3755 | \f | |
3756 | ||
dce234bc PP |
3757 | /* Build a partial symbol table. */ |
3758 | ||
3759 | void | |
f29dff0a | 3760 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 3761 | { |
f29dff0a | 3762 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
3763 | { |
3764 | init_psymbol_list (objfile, 1024); | |
3765 | } | |
3766 | ||
d146bf1e | 3767 | dwarf2_build_psymtabs_hard (objfile); |
c906108c | 3768 | } |
c906108c | 3769 | |
1ce1cefd DE |
3770 | /* Return the total length of the CU described by HEADER. */ |
3771 | ||
3772 | static unsigned int | |
3773 | get_cu_length (const struct comp_unit_head *header) | |
3774 | { | |
3775 | return header->initial_length_size + header->length; | |
3776 | } | |
3777 | ||
45452591 DE |
3778 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
3779 | ||
3780 | static inline int | |
b64f50a1 | 3781 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 3782 | { |
b64f50a1 | 3783 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 3784 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 3785 | |
b64f50a1 | 3786 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
3787 | } |
3788 | ||
3b80fe9b DE |
3789 | /* Find the base address of the compilation unit for range lists and |
3790 | location lists. It will normally be specified by DW_AT_low_pc. | |
3791 | In DWARF-3 draft 4, the base address could be overridden by | |
3792 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
3793 | compilation units with discontinuous ranges. */ | |
3794 | ||
3795 | static void | |
3796 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
3797 | { | |
3798 | struct attribute *attr; | |
3799 | ||
3800 | cu->base_known = 0; | |
3801 | cu->base_address = 0; | |
3802 | ||
3803 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
3804 | if (attr) | |
3805 | { | |
3806 | cu->base_address = DW_ADDR (attr); | |
3807 | cu->base_known = 1; | |
3808 | } | |
3809 | else | |
3810 | { | |
3811 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
3812 | if (attr) | |
3813 | { | |
3814 | cu->base_address = DW_ADDR (attr); | |
3815 | cu->base_known = 1; | |
3816 | } | |
3817 | } | |
3818 | } | |
3819 | ||
93311388 DE |
3820 | /* Read in the comp unit header information from the debug_info at info_ptr. |
3821 | NOTE: This leaves members offset, first_die_offset to be filled in | |
3822 | by the caller. */ | |
107d2387 | 3823 | |
fe1b8b76 | 3824 | static gdb_byte * |
107d2387 | 3825 | read_comp_unit_head (struct comp_unit_head *cu_header, |
fe1b8b76 | 3826 | gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
3827 | { |
3828 | int signed_addr; | |
891d2f0b | 3829 | unsigned int bytes_read; |
c764a876 DE |
3830 | |
3831 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
3832 | cu_header->initial_length_size = bytes_read; | |
3833 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 3834 | info_ptr += bytes_read; |
107d2387 AC |
3835 | cu_header->version = read_2_bytes (abfd, info_ptr); |
3836 | info_ptr += 2; | |
b64f50a1 JK |
3837 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
3838 | &bytes_read); | |
613e1657 | 3839 | info_ptr += bytes_read; |
107d2387 AC |
3840 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
3841 | info_ptr += 1; | |
3842 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
3843 | if (signed_addr < 0) | |
8e65ff28 | 3844 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 3845 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 3846 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 3847 | |
107d2387 AC |
3848 | return info_ptr; |
3849 | } | |
3850 | ||
36586728 TT |
3851 | /* Helper function that returns the proper abbrev section for |
3852 | THIS_CU. */ | |
3853 | ||
3854 | static struct dwarf2_section_info * | |
3855 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
3856 | { | |
3857 | struct dwarf2_section_info *abbrev; | |
3858 | ||
3859 | if (this_cu->is_dwz) | |
3860 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
3861 | else | |
3862 | abbrev = &dwarf2_per_objfile->abbrev; | |
3863 | ||
3864 | return abbrev; | |
3865 | } | |
3866 | ||
9ff913ba DE |
3867 | /* Subroutine of read_and_check_comp_unit_head and |
3868 | read_and_check_type_unit_head to simplify them. | |
3869 | Perform various error checking on the header. */ | |
3870 | ||
3871 | static void | |
3872 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
3873 | struct dwarf2_section_info *section, |
3874 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba DE |
3875 | { |
3876 | bfd *abfd = section->asection->owner; | |
3877 | const char *filename = bfd_get_filename (abfd); | |
3878 | ||
3879 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
3880 | error (_("Dwarf Error: wrong version in compilation unit header " | |
3881 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
3882 | filename); | |
3883 | ||
b64f50a1 | 3884 | if (header->abbrev_offset.sect_off |
36586728 | 3885 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
3886 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
3887 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 3888 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
3889 | filename); |
3890 | ||
3891 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
3892 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 3893 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
3894 | > section->size) |
3895 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
3896 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 3897 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
3898 | filename); |
3899 | } | |
3900 | ||
3901 | /* Read in a CU/TU header and perform some basic error checking. | |
3902 | The contents of the header are stored in HEADER. | |
3903 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 3904 | |
fe1b8b76 | 3905 | static gdb_byte * |
9ff913ba DE |
3906 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
3907 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 3908 | struct dwarf2_section_info *abbrev_section, |
9ff913ba DE |
3909 | gdb_byte *info_ptr, |
3910 | int is_debug_types_section) | |
72bf9492 | 3911 | { |
fe1b8b76 | 3912 | gdb_byte *beg_of_comp_unit = info_ptr; |
9ff913ba | 3913 | bfd *abfd = section->asection->owner; |
72bf9492 | 3914 | |
b64f50a1 | 3915 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 3916 | |
72bf9492 DJ |
3917 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
3918 | ||
460c1c54 CC |
3919 | /* If we're reading a type unit, skip over the signature and |
3920 | type_offset fields. */ | |
b0df02fd | 3921 | if (is_debug_types_section) |
460c1c54 CC |
3922 | info_ptr += 8 /*signature*/ + header->offset_size; |
3923 | ||
b64f50a1 | 3924 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 3925 | |
4bdcc0c1 | 3926 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
3927 | |
3928 | return info_ptr; | |
3929 | } | |
3930 | ||
348e048f DE |
3931 | /* Read in the types comp unit header information from .debug_types entry at |
3932 | types_ptr. The result is a pointer to one past the end of the header. */ | |
3933 | ||
3934 | static gdb_byte * | |
9ff913ba DE |
3935 | read_and_check_type_unit_head (struct comp_unit_head *header, |
3936 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 3937 | struct dwarf2_section_info *abbrev_section, |
9ff913ba | 3938 | gdb_byte *info_ptr, |
dee91e82 DE |
3939 | ULONGEST *signature, |
3940 | cu_offset *type_offset_in_tu) | |
348e048f | 3941 | { |
9ff913ba DE |
3942 | gdb_byte *beg_of_comp_unit = info_ptr; |
3943 | bfd *abfd = section->asection->owner; | |
348e048f | 3944 | |
b64f50a1 | 3945 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 3946 | |
9ff913ba | 3947 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 3948 | |
9ff913ba DE |
3949 | /* If we're reading a type unit, skip over the signature and |
3950 | type_offset fields. */ | |
3951 | if (signature != NULL) | |
3952 | *signature = read_8_bytes (abfd, info_ptr); | |
3953 | info_ptr += 8; | |
dee91e82 DE |
3954 | if (type_offset_in_tu != NULL) |
3955 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
3956 | header->offset_size); | |
9ff913ba DE |
3957 | info_ptr += header->offset_size; |
3958 | ||
b64f50a1 | 3959 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 3960 | |
4bdcc0c1 | 3961 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
3962 | |
3963 | return info_ptr; | |
348e048f DE |
3964 | } |
3965 | ||
f4dc4d17 DE |
3966 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
3967 | ||
3968 | static sect_offset | |
3969 | read_abbrev_offset (struct dwarf2_section_info *section, | |
3970 | sect_offset offset) | |
3971 | { | |
3972 | bfd *abfd = section->asection->owner; | |
3973 | gdb_byte *info_ptr; | |
3974 | unsigned int length, initial_length_size, offset_size; | |
3975 | sect_offset abbrev_offset; | |
3976 | ||
3977 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
3978 | info_ptr = section->buffer + offset.sect_off; | |
3979 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
3980 | offset_size = initial_length_size == 4 ? 4 : 8; | |
3981 | info_ptr += initial_length_size + 2 /*version*/; | |
3982 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
3983 | return abbrev_offset; | |
3984 | } | |
3985 | ||
aaa75496 JB |
3986 | /* Allocate a new partial symtab for file named NAME and mark this new |
3987 | partial symtab as being an include of PST. */ | |
3988 | ||
3989 | static void | |
3990 | dwarf2_create_include_psymtab (char *name, struct partial_symtab *pst, | |
3991 | struct objfile *objfile) | |
3992 | { | |
3993 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
3994 | ||
3995 | subpst->section_offsets = pst->section_offsets; | |
3996 | subpst->textlow = 0; | |
3997 | subpst->texthigh = 0; | |
3998 | ||
3999 | subpst->dependencies = (struct partial_symtab **) | |
4000 | obstack_alloc (&objfile->objfile_obstack, | |
4001 | sizeof (struct partial_symtab *)); | |
4002 | subpst->dependencies[0] = pst; | |
4003 | subpst->number_of_dependencies = 1; | |
4004 | ||
4005 | subpst->globals_offset = 0; | |
4006 | subpst->n_global_syms = 0; | |
4007 | subpst->statics_offset = 0; | |
4008 | subpst->n_static_syms = 0; | |
4009 | subpst->symtab = NULL; | |
4010 | subpst->read_symtab = pst->read_symtab; | |
4011 | subpst->readin = 0; | |
4012 | ||
4013 | /* No private part is necessary for include psymtabs. This property | |
4014 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4015 | the regular ones. */ |
58a9656e | 4016 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4017 | } |
4018 | ||
4019 | /* Read the Line Number Program data and extract the list of files | |
4020 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4021 | partial symtab for each of these included files. */ |
aaa75496 JB |
4022 | |
4023 | static void | |
4024 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4025 | struct die_info *die, |
4026 | struct partial_symtab *pst) | |
aaa75496 | 4027 | { |
d85a05f0 DJ |
4028 | struct line_header *lh = NULL; |
4029 | struct attribute *attr; | |
aaa75496 | 4030 | |
d85a05f0 DJ |
4031 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4032 | if (attr) | |
3019eac3 | 4033 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4034 | if (lh == NULL) |
4035 | return; /* No linetable, so no includes. */ | |
4036 | ||
c6da4cef | 4037 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
f3f5162e | 4038 | dwarf_decode_lines (lh, pst->dirname, cu, pst, 1); |
aaa75496 JB |
4039 | |
4040 | free_line_header (lh); | |
4041 | } | |
4042 | ||
348e048f | 4043 | static hashval_t |
52dc124a | 4044 | hash_signatured_type (const void *item) |
348e048f | 4045 | { |
52dc124a | 4046 | const struct signatured_type *sig_type = item; |
9a619af0 | 4047 | |
348e048f | 4048 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4049 | return sig_type->signature; |
348e048f DE |
4050 | } |
4051 | ||
4052 | static int | |
52dc124a | 4053 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4054 | { |
4055 | const struct signatured_type *lhs = item_lhs; | |
4056 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4057 | |
348e048f DE |
4058 | return lhs->signature == rhs->signature; |
4059 | } | |
4060 | ||
1fd400ff TT |
4061 | /* Allocate a hash table for signatured types. */ |
4062 | ||
4063 | static htab_t | |
673bfd45 | 4064 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4065 | { |
4066 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4067 | hash_signatured_type, |
4068 | eq_signatured_type, | |
1fd400ff TT |
4069 | NULL, |
4070 | &objfile->objfile_obstack, | |
4071 | hashtab_obstack_allocate, | |
4072 | dummy_obstack_deallocate); | |
4073 | } | |
4074 | ||
d467dd73 | 4075 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4076 | |
4077 | static int | |
d467dd73 | 4078 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4079 | { |
4080 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4081 | struct signatured_type ***datap = datum; |
1fd400ff | 4082 | |
b4dd5633 | 4083 | **datap = sigt; |
1fd400ff TT |
4084 | ++*datap; |
4085 | ||
4086 | return 1; | |
4087 | } | |
4088 | ||
3019eac3 | 4089 | /* Create the hash table of all entries in the .debug_types section. |
80626a55 DE |
4090 | DWO_FILE is a pointer to the DWO file for .debug_types.dwo, |
4091 | NULL otherwise. | |
4092 | Note: This function processes DWO files only, not DWP files. | |
3019eac3 DE |
4093 | The result is a pointer to the hash table or NULL if there are |
4094 | no types. */ | |
348e048f | 4095 | |
3019eac3 DE |
4096 | static htab_t |
4097 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4098 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4099 | { |
3019eac3 | 4100 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4101 | htab_t types_htab = NULL; |
8b70b953 TT |
4102 | int ix; |
4103 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4104 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4105 | |
3019eac3 DE |
4106 | if (VEC_empty (dwarf2_section_info_def, types)) |
4107 | return NULL; | |
348e048f | 4108 | |
4bdcc0c1 DE |
4109 | abbrev_section = (dwo_file != NULL |
4110 | ? &dwo_file->sections.abbrev | |
4111 | : &dwarf2_per_objfile->abbrev); | |
4112 | ||
09406207 DE |
4113 | if (dwarf2_read_debug) |
4114 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4115 | dwo_file ? ".dwo" : "", | |
4116 | bfd_get_filename (abbrev_section->asection->owner)); | |
4117 | ||
8b70b953 | 4118 | for (ix = 0; |
3019eac3 | 4119 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4120 | ++ix) |
4121 | { | |
3019eac3 | 4122 | bfd *abfd; |
8b70b953 | 4123 | gdb_byte *info_ptr, *end_ptr; |
36586728 | 4124 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4125 | |
8b70b953 TT |
4126 | dwarf2_read_section (objfile, section); |
4127 | info_ptr = section->buffer; | |
348e048f | 4128 | |
8b70b953 TT |
4129 | if (info_ptr == NULL) |
4130 | continue; | |
348e048f | 4131 | |
3019eac3 DE |
4132 | /* We can't set abfd until now because the section may be empty or |
4133 | not present, in which case section->asection will be NULL. */ | |
4134 | abfd = section->asection->owner; | |
4135 | ||
36586728 TT |
4136 | if (dwo_file) |
4137 | abbrev_section = &dwo_file->sections.abbrev; | |
4138 | else | |
4139 | abbrev_section = &dwarf2_per_objfile->abbrev; | |
4140 | ||
8b70b953 | 4141 | if (types_htab == NULL) |
3019eac3 DE |
4142 | { |
4143 | if (dwo_file) | |
4144 | types_htab = allocate_dwo_unit_table (objfile); | |
4145 | else | |
4146 | types_htab = allocate_signatured_type_table (objfile); | |
4147 | } | |
348e048f | 4148 | |
dee91e82 DE |
4149 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4150 | because we don't need to read any dies: the signature is in the | |
4151 | header. */ | |
8b70b953 TT |
4152 | |
4153 | end_ptr = info_ptr + section->size; | |
4154 | while (info_ptr < end_ptr) | |
4155 | { | |
b64f50a1 | 4156 | sect_offset offset; |
3019eac3 | 4157 | cu_offset type_offset_in_tu; |
8b70b953 | 4158 | ULONGEST signature; |
52dc124a | 4159 | struct signatured_type *sig_type; |
3019eac3 | 4160 | struct dwo_unit *dwo_tu; |
8b70b953 TT |
4161 | void **slot; |
4162 | gdb_byte *ptr = info_ptr; | |
9ff913ba | 4163 | struct comp_unit_head header; |
dee91e82 | 4164 | unsigned int length; |
348e048f | 4165 | |
b64f50a1 | 4166 | offset.sect_off = ptr - section->buffer; |
348e048f | 4167 | |
8b70b953 | 4168 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4169 | table, but we don't need anything else just yet. */ |
348e048f | 4170 | |
4bdcc0c1 DE |
4171 | ptr = read_and_check_type_unit_head (&header, section, |
4172 | abbrev_section, ptr, | |
3019eac3 | 4173 | &signature, &type_offset_in_tu); |
6caca83c | 4174 | |
1ce1cefd | 4175 | length = get_cu_length (&header); |
dee91e82 | 4176 | |
6caca83c | 4177 | /* Skip dummy type units. */ |
dee91e82 DE |
4178 | if (ptr >= info_ptr + length |
4179 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4180 | { |
1ce1cefd | 4181 | info_ptr += length; |
6caca83c CC |
4182 | continue; |
4183 | } | |
8b70b953 | 4184 | |
3019eac3 DE |
4185 | if (dwo_file) |
4186 | { | |
4187 | sig_type = NULL; | |
4188 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4189 | struct dwo_unit); | |
4190 | dwo_tu->dwo_file = dwo_file; | |
4191 | dwo_tu->signature = signature; | |
4192 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
4193 | dwo_tu->info_or_types_section = section; | |
4194 | dwo_tu->offset = offset; | |
4195 | dwo_tu->length = length; | |
4196 | } | |
4197 | else | |
4198 | { | |
4199 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4200 | The real type_offset is in the DWO file. */ | |
4201 | dwo_tu = NULL; | |
4202 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4203 | struct signatured_type); | |
4204 | sig_type->signature = signature; | |
4205 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4206 | sig_type->per_cu.objfile = objfile; | |
4207 | sig_type->per_cu.is_debug_types = 1; | |
4208 | sig_type->per_cu.info_or_types_section = section; | |
4209 | sig_type->per_cu.offset = offset; | |
4210 | sig_type->per_cu.length = length; | |
4211 | } | |
8b70b953 | 4212 | |
3019eac3 DE |
4213 | slot = htab_find_slot (types_htab, |
4214 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4215 | INSERT); | |
8b70b953 TT |
4216 | gdb_assert (slot != NULL); |
4217 | if (*slot != NULL) | |
4218 | { | |
3019eac3 DE |
4219 | sect_offset dup_offset; |
4220 | ||
4221 | if (dwo_file) | |
4222 | { | |
4223 | const struct dwo_unit *dup_tu = *slot; | |
4224 | ||
4225 | dup_offset = dup_tu->offset; | |
4226 | } | |
4227 | else | |
4228 | { | |
4229 | const struct signatured_type *dup_tu = *slot; | |
4230 | ||
4231 | dup_offset = dup_tu->per_cu.offset; | |
4232 | } | |
b3c8eb43 | 4233 | |
8b70b953 TT |
4234 | complaint (&symfile_complaints, |
4235 | _("debug type entry at offset 0x%x is duplicate to the " | |
4236 | "entry at offset 0x%x, signature 0x%s"), | |
3019eac3 | 4237 | offset.sect_off, dup_offset.sect_off, |
8b70b953 | 4238 | phex (signature, sizeof (signature))); |
8b70b953 | 4239 | } |
3019eac3 | 4240 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4241 | |
09406207 | 4242 | if (dwarf2_read_debug) |
8b70b953 | 4243 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature 0x%s\n", |
b64f50a1 JK |
4244 | offset.sect_off, |
4245 | phex (signature, sizeof (signature))); | |
348e048f | 4246 | |
dee91e82 | 4247 | info_ptr += length; |
8b70b953 | 4248 | } |
348e048f DE |
4249 | } |
4250 | ||
3019eac3 DE |
4251 | return types_htab; |
4252 | } | |
4253 | ||
4254 | /* Create the hash table of all entries in the .debug_types section, | |
4255 | and initialize all_type_units. | |
4256 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4257 | otherwise non-zero. */ | |
4258 | ||
4259 | static int | |
4260 | create_all_type_units (struct objfile *objfile) | |
4261 | { | |
4262 | htab_t types_htab; | |
b4dd5633 | 4263 | struct signatured_type **iter; |
3019eac3 DE |
4264 | |
4265 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4266 | if (types_htab == NULL) | |
4267 | { | |
4268 | dwarf2_per_objfile->signatured_types = NULL; | |
4269 | return 0; | |
4270 | } | |
4271 | ||
348e048f DE |
4272 | dwarf2_per_objfile->signatured_types = types_htab; |
4273 | ||
d467dd73 DE |
4274 | dwarf2_per_objfile->n_type_units = htab_elements (types_htab); |
4275 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 4276 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 4277 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 4278 | * sizeof (struct signatured_type *)); |
d467dd73 DE |
4279 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4280 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4281 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4282 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4283 | |
348e048f DE |
4284 | return 1; |
4285 | } | |
4286 | ||
380bca97 | 4287 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
e319fa28 | 4288 | Returns NULL if signature SIG is not present in the table. */ |
348e048f DE |
4289 | |
4290 | static struct signatured_type * | |
e319fa28 | 4291 | lookup_signatured_type (ULONGEST sig) |
348e048f DE |
4292 | { |
4293 | struct signatured_type find_entry, *entry; | |
4294 | ||
4295 | if (dwarf2_per_objfile->signatured_types == NULL) | |
4296 | { | |
4297 | complaint (&symfile_complaints, | |
55f1336d | 4298 | _("missing `.debug_types' section for DW_FORM_ref_sig8 die")); |
dcc07052 | 4299 | return NULL; |
348e048f DE |
4300 | } |
4301 | ||
4302 | find_entry.signature = sig; | |
4303 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4304 | return entry; | |
4305 | } | |
42e7ad6c DE |
4306 | \f |
4307 | /* Low level DIE reading support. */ | |
348e048f | 4308 | |
d85a05f0 DJ |
4309 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4310 | ||
4311 | static void | |
4312 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4313 | struct dwarf2_cu *cu, |
3019eac3 DE |
4314 | struct dwarf2_section_info *section, |
4315 | struct dwo_file *dwo_file) | |
d85a05f0 | 4316 | { |
fceca515 | 4317 | gdb_assert (section->readin && section->buffer != NULL); |
dee91e82 | 4318 | reader->abfd = section->asection->owner; |
d85a05f0 | 4319 | reader->cu = cu; |
3019eac3 | 4320 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4321 | reader->die_section = section; |
4322 | reader->buffer = section->buffer; | |
f664829e | 4323 | reader->buffer_end = section->buffer + section->size; |
d85a05f0 DJ |
4324 | } |
4325 | ||
fd820528 | 4326 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 4327 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 4328 | |
f4dc4d17 DE |
4329 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
4330 | Otherwise the table specified in the comp unit header is read in and used. | |
4331 | This is an optimization for when we already have the abbrev table. | |
4332 | ||
dee91e82 DE |
4333 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
4334 | Otherwise, a new CU is allocated with xmalloc. | |
4335 | ||
4336 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
4337 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
4338 | ||
4339 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 4340 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 4341 | |
70221824 | 4342 | static void |
fd820528 | 4343 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 4344 | struct abbrev_table *abbrev_table, |
fd820528 DE |
4345 | int use_existing_cu, int keep, |
4346 | die_reader_func_ftype *die_reader_func, | |
4347 | void *data) | |
c906108c | 4348 | { |
dee91e82 | 4349 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 DE |
4350 | struct dwarf2_section_info *section = this_cu->info_or_types_section; |
4351 | bfd *abfd = section->asection->owner; | |
dee91e82 DE |
4352 | struct dwarf2_cu *cu; |
4353 | gdb_byte *begin_info_ptr, *info_ptr; | |
4354 | struct die_reader_specs reader; | |
d85a05f0 | 4355 | struct die_info *comp_unit_die; |
dee91e82 | 4356 | int has_children; |
d85a05f0 | 4357 | struct attribute *attr; |
dee91e82 DE |
4358 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
4359 | struct signatured_type *sig_type = NULL; | |
4bdcc0c1 | 4360 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
4361 | /* Non-zero if CU currently points to a DWO file and we need to |
4362 | reread it. When this happens we need to reread the skeleton die | |
4363 | before we can reread the DWO file. */ | |
4364 | int rereading_dwo_cu = 0; | |
c906108c | 4365 | |
09406207 DE |
4366 | if (dwarf2_die_debug) |
4367 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4368 | this_cu->is_debug_types ? "type" : "comp", | |
4369 | this_cu->offset.sect_off); | |
4370 | ||
dee91e82 DE |
4371 | if (use_existing_cu) |
4372 | gdb_assert (keep); | |
23745b47 | 4373 | |
dee91e82 DE |
4374 | cleanups = make_cleanup (null_cleanup, NULL); |
4375 | ||
4376 | /* This is cheap if the section is already read in. */ | |
4377 | dwarf2_read_section (objfile, section); | |
4378 | ||
4379 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
4380 | |
4381 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
4382 | |
4383 | if (use_existing_cu && this_cu->cu != NULL) | |
4384 | { | |
4385 | cu = this_cu->cu; | |
42e7ad6c DE |
4386 | |
4387 | /* If this CU is from a DWO file we need to start over, we need to | |
4388 | refetch the attributes from the skeleton CU. | |
4389 | This could be optimized by retrieving those attributes from when we | |
4390 | were here the first time: the previous comp_unit_die was stored in | |
4391 | comp_unit_obstack. But there's no data yet that we need this | |
4392 | optimization. */ | |
4393 | if (cu->dwo_unit != NULL) | |
4394 | rereading_dwo_cu = 1; | |
dee91e82 DE |
4395 | } |
4396 | else | |
4397 | { | |
4398 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
4399 | gdb_assert (this_cu->cu == NULL); | |
4400 | ||
4401 | cu = xmalloc (sizeof (*cu)); | |
4402 | init_one_comp_unit (cu, this_cu); | |
4403 | ||
4404 | /* If an error occurs while loading, release our storage. */ | |
4405 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
42e7ad6c | 4406 | } |
dee91e82 | 4407 | |
42e7ad6c DE |
4408 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
4409 | { | |
4410 | /* We already have the header, there's no need to read it in again. */ | |
4411 | info_ptr += cu->header.first_die_offset.cu_off; | |
4412 | } | |
4413 | else | |
4414 | { | |
3019eac3 | 4415 | if (this_cu->is_debug_types) |
dee91e82 DE |
4416 | { |
4417 | ULONGEST signature; | |
42e7ad6c | 4418 | cu_offset type_offset_in_tu; |
dee91e82 | 4419 | |
4bdcc0c1 DE |
4420 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
4421 | abbrev_section, info_ptr, | |
42e7ad6c DE |
4422 | &signature, |
4423 | &type_offset_in_tu); | |
dee91e82 | 4424 | |
42e7ad6c DE |
4425 | /* Since per_cu is the first member of struct signatured_type, |
4426 | we can go from a pointer to one to a pointer to the other. */ | |
4427 | sig_type = (struct signatured_type *) this_cu; | |
4428 | gdb_assert (sig_type->signature == signature); | |
4429 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
4430 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
4431 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
4432 | ||
42e7ad6c DE |
4433 | /* LENGTH has not been set yet for type units if we're |
4434 | using .gdb_index. */ | |
1ce1cefd | 4435 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
4436 | |
4437 | /* Establish the type offset that can be used to lookup the type. */ | |
4438 | sig_type->type_offset_in_section.sect_off = | |
4439 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
4440 | } |
4441 | else | |
4442 | { | |
4bdcc0c1 DE |
4443 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4444 | abbrev_section, | |
4445 | info_ptr, 0); | |
dee91e82 DE |
4446 | |
4447 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 4448 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
4449 | } |
4450 | } | |
10b3939b | 4451 | |
6caca83c | 4452 | /* Skip dummy compilation units. */ |
dee91e82 | 4453 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
4454 | || peek_abbrev_code (abfd, info_ptr) == 0) |
4455 | { | |
dee91e82 | 4456 | do_cleanups (cleanups); |
21b2bd31 | 4457 | return; |
6caca83c CC |
4458 | } |
4459 | ||
433df2d4 DE |
4460 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
4461 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
4462 | done. Note that it's important that if the CU had an abbrev table |
4463 | on entry we don't free it when we're done: Somewhere up the call stack | |
4464 | it may be in use. */ | |
f4dc4d17 DE |
4465 | if (abbrev_table != NULL) |
4466 | { | |
4467 | gdb_assert (cu->abbrev_table == NULL); | |
4468 | gdb_assert (cu->header.abbrev_offset.sect_off | |
4469 | == abbrev_table->offset.sect_off); | |
4470 | cu->abbrev_table = abbrev_table; | |
4471 | } | |
4472 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 4473 | { |
4bdcc0c1 | 4474 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
4475 | make_cleanup (dwarf2_free_abbrev_table, cu); |
4476 | } | |
42e7ad6c DE |
4477 | else if (rereading_dwo_cu) |
4478 | { | |
4479 | dwarf2_free_abbrev_table (cu); | |
4480 | dwarf2_read_abbrevs (cu, abbrev_section); | |
4481 | } | |
af703f96 | 4482 | |
dee91e82 | 4483 | /* Read the top level CU/TU die. */ |
3019eac3 | 4484 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 4485 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 4486 | |
3019eac3 DE |
4487 | /* If we have a DWO stub, process it and then read in the DWO file. |
4488 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains | |
4489 | a DWO CU, that this test will fail. */ | |
4490 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
4491 | if (attr) | |
4492 | { | |
4493 | char *dwo_name = DW_STRING (attr); | |
42e7ad6c | 4494 | const char *comp_dir_string; |
3019eac3 DE |
4495 | struct dwo_unit *dwo_unit; |
4496 | ULONGEST signature; /* Or dwo_id. */ | |
42e7ad6c | 4497 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
3019eac3 | 4498 | int i,num_extra_attrs; |
4bdcc0c1 | 4499 | struct dwarf2_section_info *dwo_abbrev_section; |
3019eac3 DE |
4500 | |
4501 | if (has_children) | |
4502 | error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name" | |
4503 | " has children (offset 0x%x) [in module %s]"), | |
4504 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
4505 | ||
4506 | /* These attributes aren't processed until later: | |
4507 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
4508 | However, the attribute is found in the stub which we won't have later. | |
4509 | In order to not impose this complication on the rest of the code, | |
4510 | we read them here and copy them to the DWO CU/TU die. */ | |
3019eac3 DE |
4511 | |
4512 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
4513 | DWO file. */ | |
42e7ad6c | 4514 | stmt_list = NULL; |
3019eac3 DE |
4515 | if (! this_cu->is_debug_types) |
4516 | stmt_list = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
4517 | low_pc = dwarf2_attr (comp_unit_die, DW_AT_low_pc, cu); | |
4518 | high_pc = dwarf2_attr (comp_unit_die, DW_AT_high_pc, cu); | |
4519 | ranges = dwarf2_attr (comp_unit_die, DW_AT_ranges, cu); | |
42e7ad6c | 4520 | comp_dir = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); |
3019eac3 DE |
4521 | |
4522 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
4523 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
4524 | cu->addr_base = 0; | |
3019eac3 DE |
4525 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu); |
4526 | if (attr) | |
2e3cf129 DE |
4527 | cu->addr_base = DW_UNSND (attr); |
4528 | ||
4529 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
4530 | We need the value before we can process DW_AT_ranges. */ | |
4531 | cu->ranges_base = 0; | |
4532 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
4533 | if (attr) | |
4534 | cu->ranges_base = DW_UNSND (attr); | |
3019eac3 DE |
4535 | |
4536 | if (this_cu->is_debug_types) | |
4537 | { | |
4538 | gdb_assert (sig_type != NULL); | |
4539 | signature = sig_type->signature; | |
4540 | } | |
4541 | else | |
4542 | { | |
4543 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
4544 | if (! attr) | |
4545 | error (_("Dwarf Error: missing dwo_id [in module %s]"), | |
4546 | dwo_name); | |
4547 | signature = DW_UNSND (attr); | |
4548 | } | |
4549 | ||
4550 | /* We may need the comp_dir in order to find the DWO file. */ | |
42e7ad6c DE |
4551 | comp_dir_string = NULL; |
4552 | if (comp_dir) | |
4553 | comp_dir_string = DW_STRING (comp_dir); | |
3019eac3 DE |
4554 | |
4555 | if (this_cu->is_debug_types) | |
42e7ad6c | 4556 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir_string); |
3019eac3 | 4557 | else |
42e7ad6c | 4558 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir_string, |
3019eac3 DE |
4559 | signature); |
4560 | ||
4561 | if (dwo_unit == NULL) | |
4562 | { | |
4563 | error (_("Dwarf Error: CU at offset 0x%x references unknown DWO" | |
4564 | " with ID %s [in module %s]"), | |
4565 | this_cu->offset.sect_off, | |
4566 | phex (signature, sizeof (signature)), | |
4567 | objfile->name); | |
4568 | } | |
4569 | ||
4570 | /* Set up for reading the DWO CU/TU. */ | |
4571 | cu->dwo_unit = dwo_unit; | |
4572 | section = dwo_unit->info_or_types_section; | |
80626a55 | 4573 | dwarf2_read_section (objfile, section); |
3019eac3 | 4574 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; |
4bdcc0c1 | 4575 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
3019eac3 DE |
4576 | init_cu_die_reader (&reader, cu, section, dwo_unit->dwo_file); |
4577 | ||
4578 | if (this_cu->is_debug_types) | |
4579 | { | |
4580 | ULONGEST signature; | |
80626a55 | 4581 | cu_offset type_offset_in_tu; |
3019eac3 | 4582 | |
4bdcc0c1 DE |
4583 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
4584 | dwo_abbrev_section, | |
4585 | info_ptr, | |
80626a55 DE |
4586 | &signature, |
4587 | &type_offset_in_tu); | |
3019eac3 DE |
4588 | gdb_assert (sig_type->signature == signature); |
4589 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
80626a55 DE |
4590 | /* For DWOs coming from DWP files, we don't know the CU length |
4591 | nor the type's offset in the TU until now. */ | |
4592 | dwo_unit->length = get_cu_length (&cu->header); | |
4593 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
3019eac3 DE |
4594 | |
4595 | /* Establish the type offset that can be used to lookup the type. | |
4596 | For DWO files, we don't know it until now. */ | |
4597 | sig_type->type_offset_in_section.sect_off = | |
4598 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
4599 | } | |
4600 | else | |
4601 | { | |
4bdcc0c1 DE |
4602 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4603 | dwo_abbrev_section, | |
4604 | info_ptr, 0); | |
3019eac3 | 4605 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); |
80626a55 DE |
4606 | /* For DWOs coming from DWP files, we don't know the CU length |
4607 | until now. */ | |
4608 | dwo_unit->length = get_cu_length (&cu->header); | |
3019eac3 DE |
4609 | } |
4610 | ||
4611 | /* Discard the original CU's abbrev table, and read the DWO's. */ | |
f4dc4d17 DE |
4612 | if (abbrev_table == NULL) |
4613 | { | |
4614 | dwarf2_free_abbrev_table (cu); | |
4615 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
4616 | } | |
4617 | else | |
4618 | { | |
4619 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
4620 | make_cleanup (dwarf2_free_abbrev_table, cu); | |
4621 | } | |
3019eac3 DE |
4622 | |
4623 | /* Read in the die, but leave space to copy over the attributes | |
4624 | from the stub. This has the benefit of simplifying the rest of | |
4625 | the code - all the real work is done here. */ | |
4626 | num_extra_attrs = ((stmt_list != NULL) | |
4627 | + (low_pc != NULL) | |
4628 | + (high_pc != NULL) | |
42e7ad6c DE |
4629 | + (ranges != NULL) |
4630 | + (comp_dir != NULL)); | |
3019eac3 DE |
4631 | info_ptr = read_full_die_1 (&reader, &comp_unit_die, info_ptr, |
4632 | &has_children, num_extra_attrs); | |
4633 | ||
4634 | /* Copy over the attributes from the stub to the DWO die. */ | |
4635 | i = comp_unit_die->num_attrs; | |
4636 | if (stmt_list != NULL) | |
4637 | comp_unit_die->attrs[i++] = *stmt_list; | |
4638 | if (low_pc != NULL) | |
4639 | comp_unit_die->attrs[i++] = *low_pc; | |
4640 | if (high_pc != NULL) | |
4641 | comp_unit_die->attrs[i++] = *high_pc; | |
4642 | if (ranges != NULL) | |
4643 | comp_unit_die->attrs[i++] = *ranges; | |
42e7ad6c DE |
4644 | if (comp_dir != NULL) |
4645 | comp_unit_die->attrs[i++] = *comp_dir; | |
3019eac3 DE |
4646 | comp_unit_die->num_attrs += num_extra_attrs; |
4647 | ||
4648 | /* Skip dummy compilation units. */ | |
4649 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
4650 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
4651 | { | |
4652 | do_cleanups (cleanups); | |
4653 | return; | |
4654 | } | |
4655 | } | |
4656 | ||
dee91e82 DE |
4657 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
4658 | ||
4659 | if (free_cu_cleanup != NULL) | |
348e048f | 4660 | { |
dee91e82 DE |
4661 | if (keep) |
4662 | { | |
4663 | /* We've successfully allocated this compilation unit. Let our | |
4664 | caller clean it up when finished with it. */ | |
4665 | discard_cleanups (free_cu_cleanup); | |
4666 | ||
4667 | /* We can only discard free_cu_cleanup and all subsequent cleanups. | |
4668 | So we have to manually free the abbrev table. */ | |
4669 | dwarf2_free_abbrev_table (cu); | |
4670 | ||
4671 | /* Link this CU into read_in_chain. */ | |
4672 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
4673 | dwarf2_per_objfile->read_in_chain = this_cu; | |
4674 | } | |
4675 | else | |
4676 | do_cleanups (free_cu_cleanup); | |
348e048f | 4677 | } |
dee91e82 DE |
4678 | |
4679 | do_cleanups (cleanups); | |
4680 | } | |
4681 | ||
3019eac3 DE |
4682 | /* Read CU/TU THIS_CU in section SECTION, |
4683 | but do not follow DW_AT_GNU_dwo_name if present. | |
80626a55 DE |
4684 | DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed |
4685 | to have already done the lookup to find the DWO/DWP file). | |
dee91e82 DE |
4686 | |
4687 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 4688 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
4689 | |
4690 | We fill in THIS_CU->length. | |
4691 | ||
4692 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
4693 | linker) then DIE_READER_FUNC will not get called. | |
4694 | ||
4695 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4696 | This is done in order to not leave THIS_CU->cu in a state where we have |
4697 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
4698 | |
4699 | static void | |
4700 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
4701 | struct dwarf2_section_info *abbrev_section, | |
3019eac3 | 4702 | struct dwo_file *dwo_file, |
dee91e82 DE |
4703 | die_reader_func_ftype *die_reader_func, |
4704 | void *data) | |
4705 | { | |
4706 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3019eac3 DE |
4707 | struct dwarf2_section_info *section = this_cu->info_or_types_section; |
4708 | bfd *abfd = section->asection->owner; | |
dee91e82 DE |
4709 | struct dwarf2_cu cu; |
4710 | gdb_byte *begin_info_ptr, *info_ptr; | |
4711 | struct die_reader_specs reader; | |
4712 | struct cleanup *cleanups; | |
4713 | struct die_info *comp_unit_die; | |
4714 | int has_children; | |
4715 | ||
09406207 DE |
4716 | if (dwarf2_die_debug) |
4717 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4718 | this_cu->is_debug_types ? "type" : "comp", | |
4719 | this_cu->offset.sect_off); | |
4720 | ||
dee91e82 DE |
4721 | gdb_assert (this_cu->cu == NULL); |
4722 | ||
dee91e82 DE |
4723 | /* This is cheap if the section is already read in. */ |
4724 | dwarf2_read_section (objfile, section); | |
4725 | ||
4726 | init_one_comp_unit (&cu, this_cu); | |
4727 | ||
4728 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
4729 | ||
4730 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
4731 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
4732 | abbrev_section, info_ptr, | |
3019eac3 | 4733 | this_cu->is_debug_types); |
dee91e82 | 4734 | |
1ce1cefd | 4735 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
4736 | |
4737 | /* Skip dummy compilation units. */ | |
4738 | if (info_ptr >= begin_info_ptr + this_cu->length | |
4739 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 4740 | { |
dee91e82 | 4741 | do_cleanups (cleanups); |
21b2bd31 | 4742 | return; |
93311388 | 4743 | } |
72bf9492 | 4744 | |
dee91e82 DE |
4745 | dwarf2_read_abbrevs (&cu, abbrev_section); |
4746 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
4747 | ||
3019eac3 | 4748 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
4749 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
4750 | ||
4751 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
4752 | ||
4753 | do_cleanups (cleanups); | |
4754 | } | |
4755 | ||
3019eac3 DE |
4756 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
4757 | does not lookup the specified DWO file. | |
4758 | This cannot be used to read DWO files. | |
dee91e82 DE |
4759 | |
4760 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4761 | This is done in order to not leave THIS_CU->cu in a state where we have |
4762 | to care whether it refers to the "main" CU or the DWO CU. | |
4763 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
4764 | |
4765 | static void | |
4766 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
4767 | die_reader_func_ftype *die_reader_func, | |
4768 | void *data) | |
4769 | { | |
4770 | init_cutu_and_read_dies_no_follow (this_cu, | |
36586728 | 4771 | get_abbrev_section_for_cu (this_cu), |
3019eac3 | 4772 | NULL, |
dee91e82 DE |
4773 | die_reader_func, data); |
4774 | } | |
4775 | ||
f4dc4d17 DE |
4776 | /* Create a psymtab named NAME and assign it to PER_CU. |
4777 | ||
4778 | The caller must fill in the following details: | |
4779 | dirname, textlow, texthigh. */ | |
4780 | ||
4781 | static struct partial_symtab * | |
4782 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
4783 | { | |
4784 | struct objfile *objfile = per_cu->objfile; | |
4785 | struct partial_symtab *pst; | |
4786 | ||
4787 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
4788 | name, 0, | |
4789 | objfile->global_psymbols.next, | |
4790 | objfile->static_psymbols.next); | |
4791 | ||
4792 | pst->psymtabs_addrmap_supported = 1; | |
4793 | ||
4794 | /* This is the glue that links PST into GDB's symbol API. */ | |
4795 | pst->read_symtab_private = per_cu; | |
4796 | pst->read_symtab = dwarf2_psymtab_to_symtab; | |
4797 | per_cu->v.psymtab = pst; | |
4798 | ||
4799 | return pst; | |
4800 | } | |
4801 | ||
dee91e82 DE |
4802 | /* die_reader_func for process_psymtab_comp_unit. */ |
4803 | ||
4804 | static void | |
4805 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
4806 | gdb_byte *info_ptr, | |
4807 | struct die_info *comp_unit_die, | |
4808 | int has_children, | |
4809 | void *data) | |
4810 | { | |
4811 | struct dwarf2_cu *cu = reader->cu; | |
4812 | struct objfile *objfile = cu->objfile; | |
4813 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
dee91e82 DE |
4814 | struct attribute *attr; |
4815 | CORE_ADDR baseaddr; | |
4816 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
4817 | struct partial_symtab *pst; | |
4818 | int has_pc_info; | |
4819 | const char *filename; | |
95554aad | 4820 | int *want_partial_unit_ptr = data; |
dee91e82 | 4821 | |
95554aad TT |
4822 | if (comp_unit_die->tag == DW_TAG_partial_unit |
4823 | && (want_partial_unit_ptr == NULL | |
4824 | || !*want_partial_unit_ptr)) | |
dee91e82 DE |
4825 | return; |
4826 | ||
f4dc4d17 DE |
4827 | gdb_assert (! per_cu->is_debug_types); |
4828 | ||
95554aad | 4829 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
dee91e82 DE |
4830 | |
4831 | cu->list_in_scope = &file_symbols; | |
c906108c | 4832 | |
93311388 | 4833 | /* Allocate a new partial symbol table structure. */ |
dee91e82 | 4834 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); |
3e2a0cee TT |
4835 | if (attr == NULL || !DW_STRING (attr)) |
4836 | filename = ""; | |
4837 | else | |
4838 | filename = DW_STRING (attr); | |
72bf9492 | 4839 | |
f4dc4d17 DE |
4840 | pst = create_partial_symtab (per_cu, filename); |
4841 | ||
4842 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
dee91e82 | 4843 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); |
d85a05f0 DJ |
4844 | if (attr != NULL) |
4845 | pst->dirname = DW_STRING (attr); | |
72bf9492 | 4846 | |
93311388 | 4847 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
e7c27a73 | 4848 | |
dee91e82 | 4849 | dwarf2_find_base_address (comp_unit_die, cu); |
d85a05f0 | 4850 | |
93311388 DE |
4851 | /* Possibly set the default values of LOWPC and HIGHPC from |
4852 | `DW_AT_ranges'. */ | |
d85a05f0 | 4853 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
dee91e82 | 4854 | &best_highpc, cu, pst); |
d85a05f0 | 4855 | if (has_pc_info == 1 && best_lowpc < best_highpc) |
93311388 DE |
4856 | /* Store the contiguous range if it is not empty; it can be empty for |
4857 | CUs with no code. */ | |
4858 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
d85a05f0 DJ |
4859 | best_lowpc + baseaddr, |
4860 | best_highpc + baseaddr - 1, pst); | |
93311388 DE |
4861 | |
4862 | /* Check if comp unit has_children. | |
4863 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 4864 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 4865 | if (has_children) |
93311388 DE |
4866 | { |
4867 | struct partial_die_info *first_die; | |
4868 | CORE_ADDR lowpc, highpc; | |
31ffec48 | 4869 | |
93311388 DE |
4870 | lowpc = ((CORE_ADDR) -1); |
4871 | highpc = ((CORE_ADDR) 0); | |
c906108c | 4872 | |
dee91e82 | 4873 | first_die = load_partial_dies (reader, info_ptr, 1); |
c906108c | 4874 | |
93311388 | 4875 | scan_partial_symbols (first_die, &lowpc, &highpc, |
dee91e82 | 4876 | ! has_pc_info, cu); |
57c22c6c | 4877 | |
93311388 DE |
4878 | /* If we didn't find a lowpc, set it to highpc to avoid |
4879 | complaints from `maint check'. */ | |
4880 | if (lowpc == ((CORE_ADDR) -1)) | |
4881 | lowpc = highpc; | |
10b3939b | 4882 | |
93311388 DE |
4883 | /* If the compilation unit didn't have an explicit address range, |
4884 | then use the information extracted from its child dies. */ | |
d85a05f0 | 4885 | if (! has_pc_info) |
93311388 | 4886 | { |
d85a05f0 DJ |
4887 | best_lowpc = lowpc; |
4888 | best_highpc = highpc; | |
93311388 DE |
4889 | } |
4890 | } | |
d85a05f0 DJ |
4891 | pst->textlow = best_lowpc + baseaddr; |
4892 | pst->texthigh = best_highpc + baseaddr; | |
c906108c | 4893 | |
93311388 DE |
4894 | pst->n_global_syms = objfile->global_psymbols.next - |
4895 | (objfile->global_psymbols.list + pst->globals_offset); | |
4896 | pst->n_static_syms = objfile->static_psymbols.next - | |
4897 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 4898 | sort_pst_symbols (objfile, pst); |
c906108c | 4899 | |
f4dc4d17 | 4900 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs)) |
95554aad TT |
4901 | { |
4902 | int i; | |
f4dc4d17 | 4903 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs); |
95554aad TT |
4904 | struct dwarf2_per_cu_data *iter; |
4905 | ||
4906 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
4907 | post-pass. */ | |
4908 | pst->number_of_dependencies = len; | |
4909 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
4910 | len * sizeof (struct symtab *)); | |
4911 | for (i = 0; | |
f4dc4d17 | 4912 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs, |
95554aad TT |
4913 | i, iter); |
4914 | ++i) | |
4915 | pst->dependencies[i] = iter->v.psymtab; | |
4916 | ||
f4dc4d17 | 4917 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs); |
95554aad TT |
4918 | } |
4919 | ||
f4dc4d17 DE |
4920 | /* Get the list of files included in the current compilation unit, |
4921 | and build a psymtab for each of them. */ | |
4922 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
09406207 DE |
4923 | |
4924 | if (dwarf2_read_debug) | |
4925 | { | |
4926 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
4927 | ||
4928 | fprintf_unfiltered (gdb_stdlog, | |
844226d6 | 4929 | "Psymtab for %s unit @0x%x: %s - %s" |
09406207 DE |
4930 | ", %d global, %d static syms\n", |
4931 | per_cu->is_debug_types ? "type" : "comp", | |
4932 | per_cu->offset.sect_off, | |
4933 | paddress (gdbarch, pst->textlow), | |
4934 | paddress (gdbarch, pst->texthigh), | |
4935 | pst->n_global_syms, pst->n_static_syms); | |
4936 | } | |
dee91e82 | 4937 | } |
ae038cb0 | 4938 | |
dee91e82 DE |
4939 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. |
4940 | Process compilation unit THIS_CU for a psymtab. */ | |
4941 | ||
4942 | static void | |
95554aad TT |
4943 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, |
4944 | int want_partial_unit) | |
dee91e82 DE |
4945 | { |
4946 | /* If this compilation unit was already read in, free the | |
4947 | cached copy in order to read it in again. This is | |
4948 | necessary because we skipped some symbols when we first | |
4949 | read in the compilation unit (see load_partial_dies). | |
4950 | This problem could be avoided, but the benefit is unclear. */ | |
4951 | if (this_cu->cu != NULL) | |
4952 | free_one_cached_comp_unit (this_cu); | |
4953 | ||
3019eac3 | 4954 | gdb_assert (! this_cu->is_debug_types); |
f4dc4d17 DE |
4955 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, |
4956 | process_psymtab_comp_unit_reader, | |
95554aad | 4957 | &want_partial_unit); |
dee91e82 DE |
4958 | |
4959 | /* Age out any secondary CUs. */ | |
4960 | age_cached_comp_units (); | |
93311388 | 4961 | } |
ff013f42 | 4962 | |
f4dc4d17 DE |
4963 | static hashval_t |
4964 | hash_type_unit_group (const void *item) | |
4965 | { | |
094b34ac | 4966 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 4967 | |
094b34ac | 4968 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 4969 | } |
348e048f DE |
4970 | |
4971 | static int | |
f4dc4d17 | 4972 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 4973 | { |
f4dc4d17 DE |
4974 | const struct type_unit_group *lhs = item_lhs; |
4975 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 4976 | |
094b34ac | 4977 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 4978 | } |
348e048f | 4979 | |
f4dc4d17 DE |
4980 | /* Allocate a hash table for type unit groups. */ |
4981 | ||
4982 | static htab_t | |
4983 | allocate_type_unit_groups_table (void) | |
4984 | { | |
4985 | return htab_create_alloc_ex (3, | |
4986 | hash_type_unit_group, | |
4987 | eq_type_unit_group, | |
4988 | NULL, | |
4989 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
4990 | hashtab_obstack_allocate, | |
4991 | dummy_obstack_deallocate); | |
4992 | } | |
dee91e82 | 4993 | |
f4dc4d17 DE |
4994 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
4995 | partial symtabs. We combine several TUs per psymtab to not let the size | |
4996 | of any one psymtab grow too big. */ | |
4997 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
4998 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 4999 | |
094b34ac | 5000 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5001 | Create the type_unit_group object used to hold one or more TUs. */ |
5002 | ||
5003 | static struct type_unit_group * | |
094b34ac | 5004 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5005 | { |
5006 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5007 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5008 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5009 | |
5010 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5011 | struct type_unit_group); | |
094b34ac | 5012 | per_cu = &tu_group->per_cu; |
f4dc4d17 DE |
5013 | per_cu->objfile = objfile; |
5014 | per_cu->is_debug_types = 1; | |
5015 | per_cu->s.type_unit_group = tu_group; | |
5016 | ||
094b34ac DE |
5017 | if (dwarf2_per_objfile->using_index) |
5018 | { | |
5019 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5020 | struct dwarf2_per_cu_quick_data); | |
5021 | tu_group->t.first_tu = cu->per_cu; | |
5022 | } | |
5023 | else | |
5024 | { | |
5025 | unsigned int line_offset = line_offset_struct.sect_off; | |
5026 | struct partial_symtab *pst; | |
5027 | char *name; | |
5028 | ||
5029 | /* Give the symtab a useful name for debug purposes. */ | |
5030 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5031 | name = xstrprintf ("<type_units_%d>", | |
5032 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5033 | else | |
5034 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5035 | ||
5036 | pst = create_partial_symtab (per_cu, name); | |
5037 | pst->anonymous = 1; | |
f4dc4d17 | 5038 | |
094b34ac DE |
5039 | xfree (name); |
5040 | } | |
f4dc4d17 | 5041 | |
094b34ac DE |
5042 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5043 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5044 | |
5045 | return tu_group; | |
5046 | } | |
5047 | ||
094b34ac DE |
5048 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5049 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5050 | |
5051 | static struct type_unit_group * | |
094b34ac | 5052 | get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list) |
f4dc4d17 DE |
5053 | { |
5054 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5055 | struct type_unit_group *tu_group; | |
5056 | void **slot; | |
5057 | unsigned int line_offset; | |
5058 | struct type_unit_group type_unit_group_for_lookup; | |
5059 | ||
5060 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5061 | { | |
5062 | dwarf2_per_objfile->type_unit_groups = | |
5063 | allocate_type_unit_groups_table (); | |
5064 | } | |
5065 | ||
5066 | /* Do we need to create a new group, or can we use an existing one? */ | |
5067 | ||
5068 | if (stmt_list) | |
5069 | { | |
5070 | line_offset = DW_UNSND (stmt_list); | |
5071 | ++tu_stats->nr_symtab_sharers; | |
5072 | } | |
5073 | else | |
5074 | { | |
5075 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5076 | We can do various things here like create one group per TU or | |
5077 | spread them over multiple groups to split up the expansion work. | |
5078 | To avoid worst case scenarios (too many groups or too large groups) | |
5079 | we, umm, group them in bunches. */ | |
5080 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5081 | | (tu_stats->nr_stmt_less_type_units | |
5082 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5083 | ++tu_stats->nr_stmt_less_type_units; | |
5084 | } | |
5085 | ||
094b34ac DE |
5086 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5087 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5088 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5089 | &type_unit_group_for_lookup, INSERT); | |
5090 | if (*slot != NULL) | |
5091 | { | |
5092 | tu_group = *slot; | |
5093 | gdb_assert (tu_group != NULL); | |
5094 | } | |
5095 | else | |
5096 | { | |
5097 | sect_offset line_offset_struct; | |
5098 | ||
5099 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5100 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5101 | *slot = tu_group; |
5102 | ++tu_stats->nr_symtabs; | |
5103 | } | |
5104 | ||
5105 | return tu_group; | |
5106 | } | |
5107 | ||
5108 | /* Struct used to sort TUs by their abbreviation table offset. */ | |
5109 | ||
5110 | struct tu_abbrev_offset | |
5111 | { | |
5112 | struct signatured_type *sig_type; | |
5113 | sect_offset abbrev_offset; | |
5114 | }; | |
5115 | ||
5116 | /* Helper routine for build_type_unit_groups, passed to qsort. */ | |
5117 | ||
5118 | static int | |
5119 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
5120 | { | |
5121 | const struct tu_abbrev_offset * const *a = ap; | |
5122 | const struct tu_abbrev_offset * const *b = bp; | |
5123 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
5124 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
5125 | ||
5126 | return (aoff > boff) - (aoff < boff); | |
5127 | } | |
5128 | ||
5129 | /* A helper function to add a type_unit_group to a table. */ | |
5130 | ||
5131 | static int | |
5132 | add_type_unit_group_to_table (void **slot, void *datum) | |
5133 | { | |
5134 | struct type_unit_group *tu_group = *slot; | |
5135 | struct type_unit_group ***datap = datum; | |
5136 | ||
5137 | **datap = tu_group; | |
5138 | ++*datap; | |
5139 | ||
5140 | return 1; | |
5141 | } | |
5142 | ||
5143 | /* Efficiently read all the type units, calling init_cutu_and_read_dies on | |
5144 | each one passing FUNC,DATA. | |
5145 | ||
5146 | The efficiency is because we sort TUs by the abbrev table they use and | |
5147 | only read each abbrev table once. In one program there are 200K TUs | |
5148 | sharing 8K abbrev tables. | |
5149 | ||
5150 | The main purpose of this function is to support building the | |
5151 | dwarf2_per_objfile->type_unit_groups table. | |
5152 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
5153 | can collapse the search space by grouping them by stmt_list. | |
5154 | The savings can be significant, in the same program from above the 200K TUs | |
5155 | share 8K stmt_list tables. | |
5156 | ||
5157 | FUNC is expected to call get_type_unit_group, which will create the | |
5158 | struct type_unit_group if necessary and add it to | |
5159 | dwarf2_per_objfile->type_unit_groups. */ | |
5160 | ||
5161 | static void | |
5162 | build_type_unit_groups (die_reader_func_ftype *func, void *data) | |
5163 | { | |
5164 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5165 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5166 | struct cleanup *cleanups; | |
5167 | struct abbrev_table *abbrev_table; | |
5168 | sect_offset abbrev_offset; | |
5169 | struct tu_abbrev_offset *sorted_by_abbrev; | |
5170 | struct type_unit_group **iter; | |
5171 | int i; | |
5172 | ||
5173 | /* It's up to the caller to not call us multiple times. */ | |
5174 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
5175 | ||
5176 | if (dwarf2_per_objfile->n_type_units == 0) | |
5177 | return; | |
5178 | ||
5179 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
5180 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
5181 | read each abbrev table in. | |
5182 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
5183 | This is simpler and efficient enough for now. | |
5184 | ||
5185 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
5186 | symtab to use). Typically TUs with the same abbrev offset have the same | |
5187 | stmt_list value too so in practice this should work well. | |
5188 | ||
5189 | The basic algorithm here is: | |
5190 | ||
5191 | sort TUs by abbrev table | |
5192 | for each TU with same abbrev table: | |
5193 | read abbrev table if first user | |
5194 | read TU top level DIE | |
5195 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
5196 | call FUNC */ | |
5197 | ||
5198 | if (dwarf2_read_debug) | |
5199 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
5200 | ||
5201 | /* Sort in a separate table to maintain the order of all_type_units | |
5202 | for .gdb_index: TU indices directly index all_type_units. */ | |
5203 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
5204 | dwarf2_per_objfile->n_type_units); | |
5205 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5206 | { | |
5207 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
5208 | ||
5209 | sorted_by_abbrev[i].sig_type = sig_type; | |
5210 | sorted_by_abbrev[i].abbrev_offset = | |
5211 | read_abbrev_offset (sig_type->per_cu.info_or_types_section, | |
5212 | sig_type->per_cu.offset); | |
5213 | } | |
5214 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
5215 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
5216 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
5217 | ||
094b34ac DE |
5218 | /* Note: In the .gdb_index case, get_type_unit_group may have already been |
5219 | called any number of times, so we don't reset tu_stats here. */ | |
5220 | ||
f4dc4d17 DE |
5221 | abbrev_offset.sect_off = ~(unsigned) 0; |
5222 | abbrev_table = NULL; | |
5223 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
5224 | ||
5225 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5226 | { | |
5227 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
5228 | ||
5229 | /* Switch to the next abbrev table if necessary. */ | |
5230 | if (abbrev_table == NULL | |
5231 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
5232 | { | |
5233 | if (abbrev_table != NULL) | |
5234 | { | |
5235 | abbrev_table_free (abbrev_table); | |
5236 | /* Reset to NULL in case abbrev_table_read_table throws | |
5237 | an error: abbrev_table_free_cleanup will get called. */ | |
5238 | abbrev_table = NULL; | |
5239 | } | |
5240 | abbrev_offset = tu->abbrev_offset; | |
5241 | abbrev_table = | |
5242 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
5243 | abbrev_offset); | |
5244 | ++tu_stats->nr_uniq_abbrev_tables; | |
5245 | } | |
5246 | ||
5247 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
5248 | func, data); | |
5249 | } | |
5250 | ||
5251 | /* Create a vector of pointers to primary type units to make it easy to | |
5252 | iterate over them and CUs. See dw2_get_primary_cu. */ | |
5253 | dwarf2_per_objfile->n_type_unit_groups = | |
5254 | htab_elements (dwarf2_per_objfile->type_unit_groups); | |
5255 | dwarf2_per_objfile->all_type_unit_groups = | |
5256 | obstack_alloc (&objfile->objfile_obstack, | |
5257 | dwarf2_per_objfile->n_type_unit_groups | |
5258 | * sizeof (struct type_unit_group *)); | |
5259 | iter = &dwarf2_per_objfile->all_type_unit_groups[0]; | |
5260 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5261 | add_type_unit_group_to_table, &iter); | |
5262 | gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0] | |
5263 | == dwarf2_per_objfile->n_type_unit_groups); | |
5264 | ||
5265 | do_cleanups (cleanups); | |
5266 | ||
5267 | if (dwarf2_read_debug) | |
5268 | { | |
5269 | fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n"); | |
5270 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
5271 | dwarf2_per_objfile->n_type_units); | |
5272 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
5273 | tu_stats->nr_uniq_abbrev_tables); | |
5274 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
5275 | tu_stats->nr_symtabs); | |
5276 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
5277 | tu_stats->nr_symtab_sharers); | |
5278 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
5279 | tu_stats->nr_stmt_less_type_units); | |
5280 | } | |
5281 | } | |
5282 | ||
5283 | /* Reader function for build_type_psymtabs. */ | |
5284 | ||
5285 | static void | |
5286 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
5287 | gdb_byte *info_ptr, | |
5288 | struct die_info *type_unit_die, | |
5289 | int has_children, | |
5290 | void *data) | |
5291 | { | |
5292 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5293 | struct dwarf2_cu *cu = reader->cu; | |
5294 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
5295 | struct type_unit_group *tu_group; | |
5296 | struct attribute *attr; | |
5297 | struct partial_die_info *first_die; | |
5298 | CORE_ADDR lowpc, highpc; | |
5299 | struct partial_symtab *pst; | |
5300 | ||
5301 | gdb_assert (data == NULL); | |
5302 | ||
5303 | if (! has_children) | |
5304 | return; | |
5305 | ||
5306 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 5307 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 5308 | |
094b34ac | 5309 | VEC_safe_push (dwarf2_per_cu_ptr, tu_group->t.tus, per_cu); |
f4dc4d17 DE |
5310 | |
5311 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
5312 | cu->list_in_scope = &file_symbols; | |
5313 | pst = create_partial_symtab (per_cu, ""); | |
5314 | pst->anonymous = 1; | |
5315 | ||
5316 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5317 | ||
5318 | lowpc = (CORE_ADDR) -1; | |
5319 | highpc = (CORE_ADDR) 0; | |
5320 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
5321 | ||
5322 | pst->n_global_syms = objfile->global_psymbols.next - | |
5323 | (objfile->global_psymbols.list + pst->globals_offset); | |
5324 | pst->n_static_syms = objfile->static_psymbols.next - | |
5325 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 5326 | sort_pst_symbols (objfile, pst); |
f4dc4d17 DE |
5327 | } |
5328 | ||
5329 | /* Traversal function for build_type_psymtabs. */ | |
5330 | ||
5331 | static int | |
5332 | build_type_psymtab_dependencies (void **slot, void *info) | |
5333 | { | |
5334 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5335 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 5336 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 5337 | struct partial_symtab *pst = per_cu->v.psymtab; |
094b34ac | 5338 | int len = VEC_length (dwarf2_per_cu_ptr, tu_group->t.tus); |
f4dc4d17 DE |
5339 | struct dwarf2_per_cu_data *iter; |
5340 | int i; | |
5341 | ||
5342 | gdb_assert (len > 0); | |
5343 | ||
5344 | pst->number_of_dependencies = len; | |
5345 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5346 | len * sizeof (struct psymtab *)); | |
5347 | for (i = 0; | |
094b34ac | 5348 | VEC_iterate (dwarf2_per_cu_ptr, tu_group->t.tus, i, iter); |
f4dc4d17 DE |
5349 | ++i) |
5350 | { | |
5351 | pst->dependencies[i] = iter->v.psymtab; | |
5352 | iter->s.type_unit_group = tu_group; | |
5353 | } | |
5354 | ||
094b34ac | 5355 | VEC_free (dwarf2_per_cu_ptr, tu_group->t.tus); |
348e048f DE |
5356 | |
5357 | return 1; | |
5358 | } | |
5359 | ||
5360 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5361 | Build partial symbol tables for the .debug_types comp-units. */ | |
5362 | ||
5363 | static void | |
5364 | build_type_psymtabs (struct objfile *objfile) | |
5365 | { | |
0e50663e | 5366 | if (! create_all_type_units (objfile)) |
348e048f DE |
5367 | return; |
5368 | ||
f4dc4d17 DE |
5369 | build_type_unit_groups (build_type_psymtabs_reader, NULL); |
5370 | ||
5371 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
5372 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5373 | build_type_psymtab_dependencies, NULL); | |
348e048f DE |
5374 | } |
5375 | ||
60606b2c TT |
5376 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
5377 | ||
5378 | static void | |
5379 | psymtabs_addrmap_cleanup (void *o) | |
5380 | { | |
5381 | struct objfile *objfile = o; | |
ec61707d | 5382 | |
60606b2c TT |
5383 | objfile->psymtabs_addrmap = NULL; |
5384 | } | |
5385 | ||
95554aad TT |
5386 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
5387 | ||
5388 | static void | |
5389 | set_partial_user (struct objfile *objfile) | |
5390 | { | |
5391 | int i; | |
5392 | ||
5393 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5394 | { | |
5395 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5396 | struct partial_symtab *pst = per_cu->v.psymtab; | |
5397 | int j; | |
5398 | ||
36586728 TT |
5399 | if (pst == NULL) |
5400 | continue; | |
5401 | ||
95554aad TT |
5402 | for (j = 0; j < pst->number_of_dependencies; ++j) |
5403 | { | |
5404 | /* Set the 'user' field only if it is not already set. */ | |
5405 | if (pst->dependencies[j]->user == NULL) | |
5406 | pst->dependencies[j]->user = pst; | |
5407 | } | |
5408 | } | |
5409 | } | |
5410 | ||
93311388 DE |
5411 | /* Build the partial symbol table by doing a quick pass through the |
5412 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 5413 | |
93311388 | 5414 | static void |
c67a9c90 | 5415 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 5416 | { |
60606b2c TT |
5417 | struct cleanup *back_to, *addrmap_cleanup; |
5418 | struct obstack temp_obstack; | |
21b2bd31 | 5419 | int i; |
93311388 | 5420 | |
45cfd468 DE |
5421 | if (dwarf2_read_debug) |
5422 | { | |
5423 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
5424 | objfile->name); | |
5425 | } | |
5426 | ||
98bfdba5 PA |
5427 | dwarf2_per_objfile->reading_partial_symbols = 1; |
5428 | ||
be391dca | 5429 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 5430 | |
93311388 DE |
5431 | /* Any cached compilation units will be linked by the per-objfile |
5432 | read_in_chain. Make sure to free them when we're done. */ | |
5433 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 5434 | |
348e048f DE |
5435 | build_type_psymtabs (objfile); |
5436 | ||
93311388 | 5437 | create_all_comp_units (objfile); |
c906108c | 5438 | |
60606b2c TT |
5439 | /* Create a temporary address map on a temporary obstack. We later |
5440 | copy this to the final obstack. */ | |
5441 | obstack_init (&temp_obstack); | |
5442 | make_cleanup_obstack_free (&temp_obstack); | |
5443 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
5444 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 5445 | |
21b2bd31 | 5446 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 5447 | { |
21b2bd31 | 5448 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
aaa75496 | 5449 | |
95554aad | 5450 | process_psymtab_comp_unit (per_cu, 0); |
c906108c | 5451 | } |
ff013f42 | 5452 | |
95554aad TT |
5453 | set_partial_user (objfile); |
5454 | ||
ff013f42 JK |
5455 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
5456 | &objfile->objfile_obstack); | |
60606b2c | 5457 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 5458 | |
ae038cb0 | 5459 | do_cleanups (back_to); |
45cfd468 DE |
5460 | |
5461 | if (dwarf2_read_debug) | |
5462 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
5463 | objfile->name); | |
ae038cb0 DJ |
5464 | } |
5465 | ||
3019eac3 | 5466 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
5467 | |
5468 | static void | |
dee91e82 DE |
5469 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
5470 | gdb_byte *info_ptr, | |
5471 | struct die_info *comp_unit_die, | |
5472 | int has_children, | |
5473 | void *data) | |
ae038cb0 | 5474 | { |
dee91e82 | 5475 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 5476 | |
95554aad | 5477 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 5478 | |
ae038cb0 DJ |
5479 | /* Check if comp unit has_children. |
5480 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 5481 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 5482 | if (has_children) |
dee91e82 DE |
5483 | load_partial_dies (reader, info_ptr, 0); |
5484 | } | |
98bfdba5 | 5485 | |
dee91e82 DE |
5486 | /* Load the partial DIEs for a secondary CU into memory. |
5487 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 5488 | |
dee91e82 DE |
5489 | static void |
5490 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
5491 | { | |
f4dc4d17 DE |
5492 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
5493 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
5494 | } |
5495 | ||
ae038cb0 | 5496 | static void |
36586728 TT |
5497 | read_comp_units_from_section (struct objfile *objfile, |
5498 | struct dwarf2_section_info *section, | |
5499 | unsigned int is_dwz, | |
5500 | int *n_allocated, | |
5501 | int *n_comp_units, | |
5502 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 5503 | { |
be391dca | 5504 | gdb_byte *info_ptr; |
36586728 | 5505 | bfd *abfd = section->asection->owner; |
be391dca | 5506 | |
36586728 | 5507 | dwarf2_read_section (objfile, section); |
ae038cb0 | 5508 | |
36586728 | 5509 | info_ptr = section->buffer; |
6e70227d | 5510 | |
36586728 | 5511 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 5512 | { |
c764a876 | 5513 | unsigned int length, initial_length_size; |
ae038cb0 | 5514 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 5515 | sect_offset offset; |
ae038cb0 | 5516 | |
36586728 | 5517 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
5518 | |
5519 | /* Read just enough information to find out where the next | |
5520 | compilation unit is. */ | |
36586728 | 5521 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
5522 | |
5523 | /* Save the compilation unit for later lookup. */ | |
5524 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
5525 | sizeof (struct dwarf2_per_cu_data)); | |
5526 | memset (this_cu, 0, sizeof (*this_cu)); | |
5527 | this_cu->offset = offset; | |
c764a876 | 5528 | this_cu->length = length + initial_length_size; |
36586728 | 5529 | this_cu->is_dwz = is_dwz; |
9291a0cd | 5530 | this_cu->objfile = objfile; |
36586728 | 5531 | this_cu->info_or_types_section = section; |
ae038cb0 | 5532 | |
36586728 | 5533 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 5534 | { |
36586728 TT |
5535 | *n_allocated *= 2; |
5536 | *all_comp_units = xrealloc (*all_comp_units, | |
5537 | *n_allocated | |
5538 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 5539 | } |
36586728 TT |
5540 | (*all_comp_units)[*n_comp_units] = this_cu; |
5541 | ++*n_comp_units; | |
ae038cb0 DJ |
5542 | |
5543 | info_ptr = info_ptr + this_cu->length; | |
5544 | } | |
36586728 TT |
5545 | } |
5546 | ||
5547 | /* Create a list of all compilation units in OBJFILE. | |
5548 | This is only done for -readnow and building partial symtabs. */ | |
5549 | ||
5550 | static void | |
5551 | create_all_comp_units (struct objfile *objfile) | |
5552 | { | |
5553 | int n_allocated; | |
5554 | int n_comp_units; | |
5555 | struct dwarf2_per_cu_data **all_comp_units; | |
5556 | ||
5557 | n_comp_units = 0; | |
5558 | n_allocated = 10; | |
5559 | all_comp_units = xmalloc (n_allocated | |
5560 | * sizeof (struct dwarf2_per_cu_data *)); | |
5561 | ||
5562 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
5563 | &n_allocated, &n_comp_units, &all_comp_units); | |
5564 | ||
5565 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
5566 | { | |
5567 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
5568 | ||
5569 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
5570 | &n_allocated, &n_comp_units, | |
5571 | &all_comp_units); | |
5572 | } | |
ae038cb0 DJ |
5573 | |
5574 | dwarf2_per_objfile->all_comp_units | |
5575 | = obstack_alloc (&objfile->objfile_obstack, | |
5576 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5577 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
5578 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5579 | xfree (all_comp_units); | |
5580 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
5581 | } |
5582 | ||
5734ee8b DJ |
5583 | /* Process all loaded DIEs for compilation unit CU, starting at |
5584 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
5585 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
5586 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
5587 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
5588 | and record the covered ranges in the addrmap. */ | |
c906108c | 5589 | |
72bf9492 DJ |
5590 | static void |
5591 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 5592 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 5593 | { |
72bf9492 | 5594 | struct partial_die_info *pdi; |
c906108c | 5595 | |
91c24f0a DC |
5596 | /* Now, march along the PDI's, descending into ones which have |
5597 | interesting children but skipping the children of the other ones, | |
5598 | until we reach the end of the compilation unit. */ | |
c906108c | 5599 | |
72bf9492 | 5600 | pdi = first_die; |
91c24f0a | 5601 | |
72bf9492 DJ |
5602 | while (pdi != NULL) |
5603 | { | |
5604 | fixup_partial_die (pdi, cu); | |
c906108c | 5605 | |
f55ee35c | 5606 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
5607 | children, so we need to look at them. Ditto for anonymous |
5608 | enums. */ | |
933c6fe4 | 5609 | |
72bf9492 | 5610 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
5611 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
5612 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 5613 | { |
72bf9492 | 5614 | switch (pdi->tag) |
c906108c SS |
5615 | { |
5616 | case DW_TAG_subprogram: | |
5734ee8b | 5617 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c | 5618 | break; |
72929c62 | 5619 | case DW_TAG_constant: |
c906108c SS |
5620 | case DW_TAG_variable: |
5621 | case DW_TAG_typedef: | |
91c24f0a | 5622 | case DW_TAG_union_type: |
72bf9492 | 5623 | if (!pdi->is_declaration) |
63d06c5c | 5624 | { |
72bf9492 | 5625 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
5626 | } |
5627 | break; | |
c906108c | 5628 | case DW_TAG_class_type: |
680b30c7 | 5629 | case DW_TAG_interface_type: |
c906108c | 5630 | case DW_TAG_structure_type: |
72bf9492 | 5631 | if (!pdi->is_declaration) |
c906108c | 5632 | { |
72bf9492 | 5633 | add_partial_symbol (pdi, cu); |
c906108c SS |
5634 | } |
5635 | break; | |
91c24f0a | 5636 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
5637 | if (!pdi->is_declaration) |
5638 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
5639 | break; |
5640 | case DW_TAG_base_type: | |
a02abb62 | 5641 | case DW_TAG_subrange_type: |
c906108c | 5642 | /* File scope base type definitions are added to the partial |
c5aa993b | 5643 | symbol table. */ |
72bf9492 | 5644 | add_partial_symbol (pdi, cu); |
c906108c | 5645 | break; |
d9fa45fe | 5646 | case DW_TAG_namespace: |
5734ee8b | 5647 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 5648 | break; |
5d7cb8df JK |
5649 | case DW_TAG_module: |
5650 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
5651 | break; | |
95554aad TT |
5652 | case DW_TAG_imported_unit: |
5653 | { | |
5654 | struct dwarf2_per_cu_data *per_cu; | |
5655 | ||
f4dc4d17 DE |
5656 | /* For now we don't handle imported units in type units. */ |
5657 | if (cu->per_cu->is_debug_types) | |
5658 | { | |
5659 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
5660 | " supported in type units [in module %s]"), | |
5661 | cu->objfile->name); | |
5662 | } | |
5663 | ||
95554aad | 5664 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 5665 | pdi->is_dwz, |
95554aad TT |
5666 | cu->objfile); |
5667 | ||
5668 | /* Go read the partial unit, if needed. */ | |
5669 | if (per_cu->v.psymtab == NULL) | |
5670 | process_psymtab_comp_unit (per_cu, 1); | |
5671 | ||
f4dc4d17 DE |
5672 | VEC_safe_push (dwarf2_per_cu_ptr, |
5673 | cu->per_cu->s.imported_symtabs, per_cu); | |
95554aad TT |
5674 | } |
5675 | break; | |
c906108c SS |
5676 | default: |
5677 | break; | |
5678 | } | |
5679 | } | |
5680 | ||
72bf9492 DJ |
5681 | /* If the die has a sibling, skip to the sibling. */ |
5682 | ||
5683 | pdi = pdi->die_sibling; | |
5684 | } | |
5685 | } | |
5686 | ||
5687 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 5688 | |
72bf9492 | 5689 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
5690 | name is concatenated with "::" and the partial DIE's name. For |
5691 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
5692 | Enumerators are an exception; they use the scope of their parent |
5693 | enumeration type, i.e. the name of the enumeration type is not | |
5694 | prepended to the enumerator. | |
91c24f0a | 5695 | |
72bf9492 DJ |
5696 | There are two complexities. One is DW_AT_specification; in this |
5697 | case "parent" means the parent of the target of the specification, | |
5698 | instead of the direct parent of the DIE. The other is compilers | |
5699 | which do not emit DW_TAG_namespace; in this case we try to guess | |
5700 | the fully qualified name of structure types from their members' | |
5701 | linkage names. This must be done using the DIE's children rather | |
5702 | than the children of any DW_AT_specification target. We only need | |
5703 | to do this for structures at the top level, i.e. if the target of | |
5704 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
5705 | have a parent. */ | |
5706 | ||
5707 | /* Compute the scope prefix associated with PDI's parent, in | |
5708 | compilation unit CU. The result will be allocated on CU's | |
5709 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
5710 | field. NULL is returned if no prefix is necessary. */ | |
5711 | static char * | |
5712 | partial_die_parent_scope (struct partial_die_info *pdi, | |
5713 | struct dwarf2_cu *cu) | |
5714 | { | |
5715 | char *grandparent_scope; | |
5716 | struct partial_die_info *parent, *real_pdi; | |
91c24f0a | 5717 | |
72bf9492 DJ |
5718 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
5719 | then this means the parent of the specification DIE. */ | |
5720 | ||
5721 | real_pdi = pdi; | |
72bf9492 | 5722 | while (real_pdi->has_specification) |
36586728 TT |
5723 | real_pdi = find_partial_die (real_pdi->spec_offset, |
5724 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
5725 | |
5726 | parent = real_pdi->die_parent; | |
5727 | if (parent == NULL) | |
5728 | return NULL; | |
5729 | ||
5730 | if (parent->scope_set) | |
5731 | return parent->scope; | |
5732 | ||
5733 | fixup_partial_die (parent, cu); | |
5734 | ||
10b3939b | 5735 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 5736 | |
acebe513 UW |
5737 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
5738 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
5739 | Work around this problem here. */ | |
5740 | if (cu->language == language_cplus | |
6e70227d | 5741 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
5742 | && strcmp (parent->name, "::") == 0 |
5743 | && grandparent_scope == NULL) | |
5744 | { | |
5745 | parent->scope = NULL; | |
5746 | parent->scope_set = 1; | |
5747 | return NULL; | |
5748 | } | |
5749 | ||
9c6c53f7 SA |
5750 | if (pdi->tag == DW_TAG_enumerator) |
5751 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
5752 | parent->scope = grandparent_scope; | |
5753 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 5754 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
5755 | || parent->tag == DW_TAG_structure_type |
5756 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 5757 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
5758 | || parent->tag == DW_TAG_union_type |
5759 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
5760 | { |
5761 | if (grandparent_scope == NULL) | |
5762 | parent->scope = parent->name; | |
5763 | else | |
3e43a32a MS |
5764 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
5765 | grandparent_scope, | |
f55ee35c | 5766 | parent->name, 0, cu); |
72bf9492 | 5767 | } |
72bf9492 DJ |
5768 | else |
5769 | { | |
5770 | /* FIXME drow/2004-04-01: What should we be doing with | |
5771 | function-local names? For partial symbols, we should probably be | |
5772 | ignoring them. */ | |
5773 | complaint (&symfile_complaints, | |
e2e0b3e5 | 5774 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 5775 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 5776 | parent->scope = grandparent_scope; |
c906108c SS |
5777 | } |
5778 | ||
72bf9492 DJ |
5779 | parent->scope_set = 1; |
5780 | return parent->scope; | |
5781 | } | |
5782 | ||
5783 | /* Return the fully scoped name associated with PDI, from compilation unit | |
5784 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 5785 | |
72bf9492 DJ |
5786 | static char * |
5787 | partial_die_full_name (struct partial_die_info *pdi, | |
5788 | struct dwarf2_cu *cu) | |
5789 | { | |
5790 | char *parent_scope; | |
5791 | ||
98bfdba5 PA |
5792 | /* If this is a template instantiation, we can not work out the |
5793 | template arguments from partial DIEs. So, unfortunately, we have | |
5794 | to go through the full DIEs. At least any work we do building | |
5795 | types here will be reused if full symbols are loaded later. */ | |
5796 | if (pdi->has_template_arguments) | |
5797 | { | |
5798 | fixup_partial_die (pdi, cu); | |
5799 | ||
5800 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
5801 | { | |
5802 | struct die_info *die; | |
5803 | struct attribute attr; | |
5804 | struct dwarf2_cu *ref_cu = cu; | |
5805 | ||
b64f50a1 | 5806 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
5807 | attr.name = 0; |
5808 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 5809 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
5810 | die = follow_die_ref (NULL, &attr, &ref_cu); |
5811 | ||
5812 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
5813 | } | |
5814 | } | |
5815 | ||
72bf9492 DJ |
5816 | parent_scope = partial_die_parent_scope (pdi, cu); |
5817 | if (parent_scope == NULL) | |
5818 | return NULL; | |
5819 | else | |
f55ee35c | 5820 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
5821 | } |
5822 | ||
5823 | static void | |
72bf9492 | 5824 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 5825 | { |
e7c27a73 | 5826 | struct objfile *objfile = cu->objfile; |
c906108c | 5827 | CORE_ADDR addr = 0; |
decbce07 | 5828 | char *actual_name = NULL; |
e142c38c | 5829 | CORE_ADDR baseaddr; |
72bf9492 | 5830 | int built_actual_name = 0; |
e142c38c DJ |
5831 | |
5832 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 5833 | |
94af9270 KS |
5834 | actual_name = partial_die_full_name (pdi, cu); |
5835 | if (actual_name) | |
5836 | built_actual_name = 1; | |
63d06c5c | 5837 | |
72bf9492 DJ |
5838 | if (actual_name == NULL) |
5839 | actual_name = pdi->name; | |
5840 | ||
c906108c SS |
5841 | switch (pdi->tag) |
5842 | { | |
5843 | case DW_TAG_subprogram: | |
2cfa0c8d | 5844 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 5845 | { |
2cfa0c8d JB |
5846 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
5847 | of the global scope. But in Ada, we want to be able to access | |
5848 | nested procedures globally. So all Ada subprograms are stored | |
5849 | in the global scope. */ | |
f47fb265 | 5850 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 5851 | mst_text, objfile); */ |
f47fb265 MS |
5852 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5853 | built_actual_name, | |
5854 | VAR_DOMAIN, LOC_BLOCK, | |
5855 | &objfile->global_psymbols, | |
5856 | 0, pdi->lowpc + baseaddr, | |
5857 | cu->language, objfile); | |
c906108c SS |
5858 | } |
5859 | else | |
5860 | { | |
f47fb265 | 5861 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 5862 | mst_file_text, objfile); */ |
f47fb265 MS |
5863 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5864 | built_actual_name, | |
5865 | VAR_DOMAIN, LOC_BLOCK, | |
5866 | &objfile->static_psymbols, | |
5867 | 0, pdi->lowpc + baseaddr, | |
5868 | cu->language, objfile); | |
c906108c SS |
5869 | } |
5870 | break; | |
72929c62 JB |
5871 | case DW_TAG_constant: |
5872 | { | |
5873 | struct psymbol_allocation_list *list; | |
5874 | ||
5875 | if (pdi->is_external) | |
5876 | list = &objfile->global_psymbols; | |
5877 | else | |
5878 | list = &objfile->static_psymbols; | |
f47fb265 MS |
5879 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5880 | built_actual_name, VAR_DOMAIN, LOC_STATIC, | |
5881 | list, 0, 0, cu->language, objfile); | |
72929c62 JB |
5882 | } |
5883 | break; | |
c906108c | 5884 | case DW_TAG_variable: |
95554aad TT |
5885 | if (pdi->d.locdesc) |
5886 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 5887 | |
95554aad | 5888 | if (pdi->d.locdesc |
caac4577 JG |
5889 | && addr == 0 |
5890 | && !dwarf2_per_objfile->has_section_at_zero) | |
5891 | { | |
5892 | /* A global or static variable may also have been stripped | |
5893 | out by the linker if unused, in which case its address | |
5894 | will be nullified; do not add such variables into partial | |
5895 | symbol table then. */ | |
5896 | } | |
5897 | else if (pdi->is_external) | |
c906108c SS |
5898 | { |
5899 | /* Global Variable. | |
5900 | Don't enter into the minimal symbol tables as there is | |
5901 | a minimal symbol table entry from the ELF symbols already. | |
5902 | Enter into partial symbol table if it has a location | |
5903 | descriptor or a type. | |
5904 | If the location descriptor is missing, new_symbol will create | |
5905 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
5906 | be determined from the minimal symbol table whenever the variable | |
5907 | is referenced. | |
5908 | The address for the partial symbol table entry is not | |
5909 | used by GDB, but it comes in handy for debugging partial symbol | |
5910 | table building. */ | |
5911 | ||
95554aad | 5912 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 MS |
5913 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5914 | built_actual_name, | |
5915 | VAR_DOMAIN, LOC_STATIC, | |
5916 | &objfile->global_psymbols, | |
5917 | 0, addr + baseaddr, | |
5918 | cu->language, objfile); | |
c906108c SS |
5919 | } |
5920 | else | |
5921 | { | |
0963b4bd | 5922 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 5923 | if (pdi->d.locdesc == NULL) |
decbce07 MS |
5924 | { |
5925 | if (built_actual_name) | |
5926 | xfree (actual_name); | |
5927 | return; | |
5928 | } | |
f47fb265 | 5929 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 5930 | mst_file_data, objfile); */ |
f47fb265 MS |
5931 | add_psymbol_to_list (actual_name, strlen (actual_name), |
5932 | built_actual_name, | |
5933 | VAR_DOMAIN, LOC_STATIC, | |
5934 | &objfile->static_psymbols, | |
5935 | 0, addr + baseaddr, | |
5936 | cu->language, objfile); | |
c906108c SS |
5937 | } |
5938 | break; | |
5939 | case DW_TAG_typedef: | |
5940 | case DW_TAG_base_type: | |
a02abb62 | 5941 | case DW_TAG_subrange_type: |
38d518c9 | 5942 | add_psymbol_to_list (actual_name, strlen (actual_name), |
04a679b8 | 5943 | built_actual_name, |
176620f1 | 5944 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 5945 | &objfile->static_psymbols, |
e142c38c | 5946 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 5947 | break; |
72bf9492 DJ |
5948 | case DW_TAG_namespace: |
5949 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
04a679b8 | 5950 | built_actual_name, |
72bf9492 DJ |
5951 | VAR_DOMAIN, LOC_TYPEDEF, |
5952 | &objfile->global_psymbols, | |
5953 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
5954 | break; | |
c906108c | 5955 | case DW_TAG_class_type: |
680b30c7 | 5956 | case DW_TAG_interface_type: |
c906108c SS |
5957 | case DW_TAG_structure_type: |
5958 | case DW_TAG_union_type: | |
5959 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
5960 | /* Skip external references. The DWARF standard says in the section |
5961 | about "Structure, Union, and Class Type Entries": "An incomplete | |
5962 | structure, union or class type is represented by a structure, | |
5963 | union or class entry that does not have a byte size attribute | |
5964 | and that has a DW_AT_declaration attribute." */ | |
5965 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 MS |
5966 | { |
5967 | if (built_actual_name) | |
5968 | xfree (actual_name); | |
5969 | return; | |
5970 | } | |
fa4028e9 | 5971 | |
63d06c5c DC |
5972 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
5973 | static vs. global. */ | |
38d518c9 | 5974 | add_psymbol_to_list (actual_name, strlen (actual_name), |
04a679b8 | 5975 | built_actual_name, |
176620f1 | 5976 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
5977 | (cu->language == language_cplus |
5978 | || cu->language == language_java) | |
63d06c5c DC |
5979 | ? &objfile->global_psymbols |
5980 | : &objfile->static_psymbols, | |
e142c38c | 5981 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 5982 | |
c906108c SS |
5983 | break; |
5984 | case DW_TAG_enumerator: | |
38d518c9 | 5985 | add_psymbol_to_list (actual_name, strlen (actual_name), |
04a679b8 | 5986 | built_actual_name, |
176620f1 | 5987 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
5988 | (cu->language == language_cplus |
5989 | || cu->language == language_java) | |
f6fe98ef DJ |
5990 | ? &objfile->global_psymbols |
5991 | : &objfile->static_psymbols, | |
e142c38c | 5992 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
5993 | break; |
5994 | default: | |
5995 | break; | |
5996 | } | |
5c4e30ca | 5997 | |
72bf9492 DJ |
5998 | if (built_actual_name) |
5999 | xfree (actual_name); | |
c906108c SS |
6000 | } |
6001 | ||
5c4e30ca DC |
6002 | /* Read a partial die corresponding to a namespace; also, add a symbol |
6003 | corresponding to that namespace to the symbol table. NAMESPACE is | |
6004 | the name of the enclosing namespace. */ | |
91c24f0a | 6005 | |
72bf9492 DJ |
6006 | static void |
6007 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6008 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 6009 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 6010 | { |
72bf9492 | 6011 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6012 | |
72bf9492 | 6013 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6014 | |
6015 | /* Now scan partial symbols in that namespace. */ | |
6016 | ||
91c24f0a | 6017 | if (pdi->has_children) |
5734ee8b | 6018 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
6019 | } |
6020 | ||
5d7cb8df JK |
6021 | /* Read a partial die corresponding to a Fortran module. */ |
6022 | ||
6023 | static void | |
6024 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
6025 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
6026 | { | |
f55ee35c | 6027 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
6028 | |
6029 | if (pdi->has_children) | |
6030 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
6031 | } | |
6032 | ||
bc30ff58 JB |
6033 | /* Read a partial die corresponding to a subprogram and create a partial |
6034 | symbol for that subprogram. When the CU language allows it, this | |
6035 | routine also defines a partial symbol for each nested subprogram | |
6036 | that this subprogram contains. | |
6e70227d | 6037 | |
bc30ff58 JB |
6038 | DIE my also be a lexical block, in which case we simply search |
6039 | recursively for suprograms defined inside that lexical block. | |
6040 | Again, this is only performed when the CU language allows this | |
6041 | type of definitions. */ | |
6042 | ||
6043 | static void | |
6044 | add_partial_subprogram (struct partial_die_info *pdi, | |
6045 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 6046 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
6047 | { |
6048 | if (pdi->tag == DW_TAG_subprogram) | |
6049 | { | |
6050 | if (pdi->has_pc_info) | |
6051 | { | |
6052 | if (pdi->lowpc < *lowpc) | |
6053 | *lowpc = pdi->lowpc; | |
6054 | if (pdi->highpc > *highpc) | |
6055 | *highpc = pdi->highpc; | |
5734ee8b DJ |
6056 | if (need_pc) |
6057 | { | |
6058 | CORE_ADDR baseaddr; | |
6059 | struct objfile *objfile = cu->objfile; | |
6060 | ||
6061 | baseaddr = ANOFFSET (objfile->section_offsets, | |
6062 | SECT_OFF_TEXT (objfile)); | |
6063 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
6064 | pdi->lowpc + baseaddr, |
6065 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 6066 | cu->per_cu->v.psymtab); |
5734ee8b | 6067 | } |
481860b3 GB |
6068 | } |
6069 | ||
6070 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
6071 | { | |
bc30ff58 | 6072 | if (!pdi->is_declaration) |
e8d05480 JB |
6073 | /* Ignore subprogram DIEs that do not have a name, they are |
6074 | illegal. Do not emit a complaint at this point, we will | |
6075 | do so when we convert this psymtab into a symtab. */ | |
6076 | if (pdi->name) | |
6077 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
6078 | } |
6079 | } | |
6e70227d | 6080 | |
bc30ff58 JB |
6081 | if (! pdi->has_children) |
6082 | return; | |
6083 | ||
6084 | if (cu->language == language_ada) | |
6085 | { | |
6086 | pdi = pdi->die_child; | |
6087 | while (pdi != NULL) | |
6088 | { | |
6089 | fixup_partial_die (pdi, cu); | |
6090 | if (pdi->tag == DW_TAG_subprogram | |
6091 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 6092 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
6093 | pdi = pdi->die_sibling; |
6094 | } | |
6095 | } | |
6096 | } | |
6097 | ||
91c24f0a DC |
6098 | /* Read a partial die corresponding to an enumeration type. */ |
6099 | ||
72bf9492 DJ |
6100 | static void |
6101 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
6102 | struct dwarf2_cu *cu) | |
91c24f0a | 6103 | { |
72bf9492 | 6104 | struct partial_die_info *pdi; |
91c24f0a DC |
6105 | |
6106 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
6107 | add_partial_symbol (enum_pdi, cu); |
6108 | ||
6109 | pdi = enum_pdi->die_child; | |
6110 | while (pdi) | |
91c24f0a | 6111 | { |
72bf9492 | 6112 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 6113 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 6114 | else |
72bf9492 DJ |
6115 | add_partial_symbol (pdi, cu); |
6116 | pdi = pdi->die_sibling; | |
91c24f0a | 6117 | } |
91c24f0a DC |
6118 | } |
6119 | ||
6caca83c CC |
6120 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
6121 | ||
6122 | static unsigned int | |
6123 | peek_abbrev_code (bfd *abfd, gdb_byte *info_ptr) | |
6124 | { | |
6125 | unsigned int bytes_read; | |
6126 | ||
6127 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6128 | } | |
6129 | ||
4bb7a0a7 DJ |
6130 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
6131 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
6132 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
6133 | the initial number. */ | |
6134 | ||
6135 | static struct abbrev_info * | |
fe1b8b76 | 6136 | peek_die_abbrev (gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 6137 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
6138 | { |
6139 | bfd *abfd = cu->objfile->obfd; | |
6140 | unsigned int abbrev_number; | |
6141 | struct abbrev_info *abbrev; | |
6142 | ||
6143 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
6144 | ||
6145 | if (abbrev_number == 0) | |
6146 | return NULL; | |
6147 | ||
433df2d4 | 6148 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
6149 | if (!abbrev) |
6150 | { | |
3e43a32a MS |
6151 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
6152 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
6153 | } |
6154 | ||
6155 | return abbrev; | |
6156 | } | |
6157 | ||
93311388 DE |
6158 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6159 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
6160 | DIE. Any children of the skipped DIEs will also be skipped. */ |
6161 | ||
fe1b8b76 | 6162 | static gdb_byte * |
dee91e82 | 6163 | skip_children (const struct die_reader_specs *reader, gdb_byte *info_ptr) |
4bb7a0a7 | 6164 | { |
dee91e82 | 6165 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
6166 | struct abbrev_info *abbrev; |
6167 | unsigned int bytes_read; | |
6168 | ||
6169 | while (1) | |
6170 | { | |
6171 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
6172 | if (abbrev == NULL) | |
6173 | return info_ptr + bytes_read; | |
6174 | else | |
dee91e82 | 6175 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
6176 | } |
6177 | } | |
6178 | ||
93311388 DE |
6179 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6180 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
6181 | abbrev corresponding to that skipped uleb128 should be passed in |
6182 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
6183 | children. */ | |
6184 | ||
fe1b8b76 | 6185 | static gdb_byte * |
dee91e82 DE |
6186 | skip_one_die (const struct die_reader_specs *reader, gdb_byte *info_ptr, |
6187 | struct abbrev_info *abbrev) | |
4bb7a0a7 DJ |
6188 | { |
6189 | unsigned int bytes_read; | |
6190 | struct attribute attr; | |
dee91e82 DE |
6191 | bfd *abfd = reader->abfd; |
6192 | struct dwarf2_cu *cu = reader->cu; | |
6193 | gdb_byte *buffer = reader->buffer; | |
f664829e DE |
6194 | const gdb_byte *buffer_end = reader->buffer_end; |
6195 | gdb_byte *start_info_ptr = info_ptr; | |
4bb7a0a7 DJ |
6196 | unsigned int form, i; |
6197 | ||
6198 | for (i = 0; i < abbrev->num_attrs; i++) | |
6199 | { | |
6200 | /* The only abbrev we care about is DW_AT_sibling. */ | |
6201 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
6202 | { | |
dee91e82 | 6203 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 6204 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
6205 | complaint (&symfile_complaints, |
6206 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 6207 | else |
b64f50a1 | 6208 | return buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
4bb7a0a7 DJ |
6209 | } |
6210 | ||
6211 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
6212 | form = abbrev->attrs[i].form; | |
6213 | skip_attribute: | |
6214 | switch (form) | |
6215 | { | |
4bb7a0a7 | 6216 | case DW_FORM_ref_addr: |
ae411497 TT |
6217 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
6218 | and later it is offset sized. */ | |
6219 | if (cu->header.version == 2) | |
6220 | info_ptr += cu->header.addr_size; | |
6221 | else | |
6222 | info_ptr += cu->header.offset_size; | |
6223 | break; | |
36586728 TT |
6224 | case DW_FORM_GNU_ref_alt: |
6225 | info_ptr += cu->header.offset_size; | |
6226 | break; | |
ae411497 | 6227 | case DW_FORM_addr: |
4bb7a0a7 DJ |
6228 | info_ptr += cu->header.addr_size; |
6229 | break; | |
6230 | case DW_FORM_data1: | |
6231 | case DW_FORM_ref1: | |
6232 | case DW_FORM_flag: | |
6233 | info_ptr += 1; | |
6234 | break; | |
2dc7f7b3 TT |
6235 | case DW_FORM_flag_present: |
6236 | break; | |
4bb7a0a7 DJ |
6237 | case DW_FORM_data2: |
6238 | case DW_FORM_ref2: | |
6239 | info_ptr += 2; | |
6240 | break; | |
6241 | case DW_FORM_data4: | |
6242 | case DW_FORM_ref4: | |
6243 | info_ptr += 4; | |
6244 | break; | |
6245 | case DW_FORM_data8: | |
6246 | case DW_FORM_ref8: | |
55f1336d | 6247 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
6248 | info_ptr += 8; |
6249 | break; | |
6250 | case DW_FORM_string: | |
9b1c24c8 | 6251 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
6252 | info_ptr += bytes_read; |
6253 | break; | |
2dc7f7b3 | 6254 | case DW_FORM_sec_offset: |
4bb7a0a7 | 6255 | case DW_FORM_strp: |
36586728 | 6256 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
6257 | info_ptr += cu->header.offset_size; |
6258 | break; | |
2dc7f7b3 | 6259 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
6260 | case DW_FORM_block: |
6261 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6262 | info_ptr += bytes_read; | |
6263 | break; | |
6264 | case DW_FORM_block1: | |
6265 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
6266 | break; | |
6267 | case DW_FORM_block2: | |
6268 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
6269 | break; | |
6270 | case DW_FORM_block4: | |
6271 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
6272 | break; | |
6273 | case DW_FORM_sdata: | |
6274 | case DW_FORM_udata: | |
6275 | case DW_FORM_ref_udata: | |
3019eac3 DE |
6276 | case DW_FORM_GNU_addr_index: |
6277 | case DW_FORM_GNU_str_index: | |
f664829e | 6278 | info_ptr = (gdb_byte *) safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
6279 | break; |
6280 | case DW_FORM_indirect: | |
6281 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6282 | info_ptr += bytes_read; | |
6283 | /* We need to continue parsing from here, so just go back to | |
6284 | the top. */ | |
6285 | goto skip_attribute; | |
6286 | ||
6287 | default: | |
3e43a32a MS |
6288 | error (_("Dwarf Error: Cannot handle %s " |
6289 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
6290 | dwarf_form_name (form), |
6291 | bfd_get_filename (abfd)); | |
6292 | } | |
6293 | } | |
6294 | ||
6295 | if (abbrev->has_children) | |
dee91e82 | 6296 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
6297 | else |
6298 | return info_ptr; | |
6299 | } | |
6300 | ||
93311388 | 6301 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 6302 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 6303 | |
fe1b8b76 | 6304 | static gdb_byte * |
dee91e82 DE |
6305 | locate_pdi_sibling (const struct die_reader_specs *reader, |
6306 | struct partial_die_info *orig_pdi, | |
6307 | gdb_byte *info_ptr) | |
91c24f0a DC |
6308 | { |
6309 | /* Do we know the sibling already? */ | |
72bf9492 | 6310 | |
91c24f0a DC |
6311 | if (orig_pdi->sibling) |
6312 | return orig_pdi->sibling; | |
6313 | ||
6314 | /* Are there any children to deal with? */ | |
6315 | ||
6316 | if (!orig_pdi->has_children) | |
6317 | return info_ptr; | |
6318 | ||
4bb7a0a7 | 6319 | /* Skip the children the long way. */ |
91c24f0a | 6320 | |
dee91e82 | 6321 | return skip_children (reader, info_ptr); |
91c24f0a DC |
6322 | } |
6323 | ||
c906108c SS |
6324 | /* Expand this partial symbol table into a full symbol table. */ |
6325 | ||
6326 | static void | |
5c80ed9d | 6327 | dwarf2_psymtab_to_symtab (struct objfile *objfile, struct partial_symtab *pst) |
c906108c | 6328 | { |
c906108c SS |
6329 | if (pst != NULL) |
6330 | { | |
6331 | if (pst->readin) | |
6332 | { | |
3e43a32a MS |
6333 | warning (_("bug: psymtab for %s is already read in."), |
6334 | pst->filename); | |
c906108c SS |
6335 | } |
6336 | else | |
6337 | { | |
6338 | if (info_verbose) | |
6339 | { | |
3e43a32a MS |
6340 | printf_filtered (_("Reading in symbols for %s..."), |
6341 | pst->filename); | |
c906108c SS |
6342 | gdb_flush (gdb_stdout); |
6343 | } | |
6344 | ||
10b3939b | 6345 | /* Restore our global data. */ |
5c80ed9d | 6346 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
10b3939b | 6347 | |
b2ab525c KB |
6348 | /* If this psymtab is constructed from a debug-only objfile, the |
6349 | has_section_at_zero flag will not necessarily be correct. We | |
6350 | can get the correct value for this flag by looking at the data | |
6351 | associated with the (presumably stripped) associated objfile. */ | |
5c80ed9d | 6352 | if (objfile->separate_debug_objfile_backlink) |
b2ab525c KB |
6353 | { |
6354 | struct dwarf2_per_objfile *dpo_backlink | |
5c80ed9d | 6355 | = objfile_data (objfile->separate_debug_objfile_backlink, |
b2ab525c | 6356 | dwarf2_objfile_data_key); |
9a619af0 | 6357 | |
b2ab525c KB |
6358 | dwarf2_per_objfile->has_section_at_zero |
6359 | = dpo_backlink->has_section_at_zero; | |
6360 | } | |
6361 | ||
98bfdba5 PA |
6362 | dwarf2_per_objfile->reading_partial_symbols = 0; |
6363 | ||
c906108c SS |
6364 | psymtab_to_symtab_1 (pst); |
6365 | ||
6366 | /* Finish up the debug error message. */ | |
6367 | if (info_verbose) | |
a3f17187 | 6368 | printf_filtered (_("done.\n")); |
c906108c SS |
6369 | } |
6370 | } | |
95554aad TT |
6371 | |
6372 | process_cu_includes (); | |
c906108c | 6373 | } |
9cdd5dbd DE |
6374 | \f |
6375 | /* Reading in full CUs. */ | |
c906108c | 6376 | |
10b3939b DJ |
6377 | /* Add PER_CU to the queue. */ |
6378 | ||
6379 | static void | |
95554aad TT |
6380 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
6381 | enum language pretend_language) | |
10b3939b DJ |
6382 | { |
6383 | struct dwarf2_queue_item *item; | |
6384 | ||
6385 | per_cu->queued = 1; | |
6386 | item = xmalloc (sizeof (*item)); | |
6387 | item->per_cu = per_cu; | |
95554aad | 6388 | item->pretend_language = pretend_language; |
10b3939b DJ |
6389 | item->next = NULL; |
6390 | ||
6391 | if (dwarf2_queue == NULL) | |
6392 | dwarf2_queue = item; | |
6393 | else | |
6394 | dwarf2_queue_tail->next = item; | |
6395 | ||
6396 | dwarf2_queue_tail = item; | |
6397 | } | |
6398 | ||
0907af0c DE |
6399 | /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation |
6400 | unit and add it to our queue. | |
6401 | The result is non-zero if PER_CU was queued, otherwise the result is zero | |
6402 | meaning either PER_CU is already queued or it is already loaded. */ | |
6403 | ||
6404 | static int | |
6405 | maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
6406 | struct dwarf2_per_cu_data *per_cu, | |
6407 | enum language pretend_language) | |
6408 | { | |
6409 | /* We may arrive here during partial symbol reading, if we need full | |
6410 | DIEs to process an unusual case (e.g. template arguments). Do | |
6411 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
6412 | if (dwarf2_per_objfile->reading_partial_symbols) | |
6413 | { | |
6414 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
6415 | return 1; | |
6416 | return 0; | |
6417 | } | |
6418 | ||
6419 | /* Mark the dependence relation so that we don't flush PER_CU | |
6420 | too early. */ | |
6421 | dwarf2_add_dependence (this_cu, per_cu); | |
6422 | ||
6423 | /* If it's already on the queue, we have nothing to do. */ | |
6424 | if (per_cu->queued) | |
6425 | return 0; | |
6426 | ||
6427 | /* If the compilation unit is already loaded, just mark it as | |
6428 | used. */ | |
6429 | if (per_cu->cu != NULL) | |
6430 | { | |
6431 | per_cu->cu->last_used = 0; | |
6432 | return 0; | |
6433 | } | |
6434 | ||
6435 | /* Add it to the queue. */ | |
6436 | queue_comp_unit (per_cu, pretend_language); | |
6437 | ||
6438 | return 1; | |
6439 | } | |
6440 | ||
10b3939b DJ |
6441 | /* Process the queue. */ |
6442 | ||
6443 | static void | |
a0f42c21 | 6444 | process_queue (void) |
10b3939b DJ |
6445 | { |
6446 | struct dwarf2_queue_item *item, *next_item; | |
6447 | ||
45cfd468 DE |
6448 | if (dwarf2_read_debug) |
6449 | { | |
6450 | fprintf_unfiltered (gdb_stdlog, | |
6451 | "Expanding one or more symtabs of objfile %s ...\n", | |
6452 | dwarf2_per_objfile->objfile->name); | |
6453 | } | |
6454 | ||
03dd20cc DJ |
6455 | /* The queue starts out with one item, but following a DIE reference |
6456 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
6457 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
6458 | { | |
9291a0cd TT |
6459 | if (dwarf2_per_objfile->using_index |
6460 | ? !item->per_cu->v.quick->symtab | |
6461 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
6462 | { |
6463 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
6464 | ||
6465 | if (dwarf2_read_debug) | |
6466 | { | |
6467 | fprintf_unfiltered (gdb_stdlog, | |
6468 | "Expanding symtab of %s at offset 0x%x\n", | |
6469 | per_cu->is_debug_types ? "TU" : "CU", | |
6470 | per_cu->offset.sect_off); | |
6471 | } | |
6472 | ||
6473 | if (per_cu->is_debug_types) | |
6474 | process_full_type_unit (per_cu, item->pretend_language); | |
6475 | else | |
6476 | process_full_comp_unit (per_cu, item->pretend_language); | |
6477 | ||
6478 | if (dwarf2_read_debug) | |
6479 | { | |
6480 | fprintf_unfiltered (gdb_stdlog, | |
6481 | "Done expanding %s at offset 0x%x\n", | |
6482 | per_cu->is_debug_types ? "TU" : "CU", | |
6483 | per_cu->offset.sect_off); | |
6484 | } | |
6485 | } | |
10b3939b DJ |
6486 | |
6487 | item->per_cu->queued = 0; | |
6488 | next_item = item->next; | |
6489 | xfree (item); | |
6490 | } | |
6491 | ||
6492 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
6493 | |
6494 | if (dwarf2_read_debug) | |
6495 | { | |
6496 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
6497 | dwarf2_per_objfile->objfile->name); | |
6498 | } | |
10b3939b DJ |
6499 | } |
6500 | ||
6501 | /* Free all allocated queue entries. This function only releases anything if | |
6502 | an error was thrown; if the queue was processed then it would have been | |
6503 | freed as we went along. */ | |
6504 | ||
6505 | static void | |
6506 | dwarf2_release_queue (void *dummy) | |
6507 | { | |
6508 | struct dwarf2_queue_item *item, *last; | |
6509 | ||
6510 | item = dwarf2_queue; | |
6511 | while (item) | |
6512 | { | |
6513 | /* Anything still marked queued is likely to be in an | |
6514 | inconsistent state, so discard it. */ | |
6515 | if (item->per_cu->queued) | |
6516 | { | |
6517 | if (item->per_cu->cu != NULL) | |
dee91e82 | 6518 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
6519 | item->per_cu->queued = 0; |
6520 | } | |
6521 | ||
6522 | last = item; | |
6523 | item = item->next; | |
6524 | xfree (last); | |
6525 | } | |
6526 | ||
6527 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
6528 | } | |
6529 | ||
6530 | /* Read in full symbols for PST, and anything it depends on. */ | |
6531 | ||
c906108c | 6532 | static void |
fba45db2 | 6533 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 6534 | { |
10b3939b | 6535 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
6536 | int i; |
6537 | ||
95554aad TT |
6538 | if (pst->readin) |
6539 | return; | |
6540 | ||
aaa75496 | 6541 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
6542 | if (!pst->dependencies[i]->readin |
6543 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
6544 | { |
6545 | /* Inform about additional files that need to be read in. */ | |
6546 | if (info_verbose) | |
6547 | { | |
a3f17187 | 6548 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
6549 | fputs_filtered (" ", gdb_stdout); |
6550 | wrap_here (""); | |
6551 | fputs_filtered ("and ", gdb_stdout); | |
6552 | wrap_here (""); | |
6553 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 6554 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
6555 | gdb_flush (gdb_stdout); |
6556 | } | |
6557 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
6558 | } | |
6559 | ||
e38df1d0 | 6560 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
6561 | |
6562 | if (per_cu == NULL) | |
aaa75496 JB |
6563 | { |
6564 | /* It's an include file, no symbols to read for it. | |
6565 | Everything is in the parent symtab. */ | |
6566 | pst->readin = 1; | |
6567 | return; | |
6568 | } | |
c906108c | 6569 | |
a0f42c21 | 6570 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
6571 | } |
6572 | ||
dee91e82 DE |
6573 | /* Trivial hash function for die_info: the hash value of a DIE |
6574 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 6575 | |
dee91e82 DE |
6576 | static hashval_t |
6577 | die_hash (const void *item) | |
10b3939b | 6578 | { |
dee91e82 | 6579 | const struct die_info *die = item; |
6502dd73 | 6580 | |
dee91e82 DE |
6581 | return die->offset.sect_off; |
6582 | } | |
63d06c5c | 6583 | |
dee91e82 DE |
6584 | /* Trivial comparison function for die_info structures: two DIEs |
6585 | are equal if they have the same offset. */ | |
98bfdba5 | 6586 | |
dee91e82 DE |
6587 | static int |
6588 | die_eq (const void *item_lhs, const void *item_rhs) | |
6589 | { | |
6590 | const struct die_info *die_lhs = item_lhs; | |
6591 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 6592 | |
dee91e82 DE |
6593 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
6594 | } | |
c906108c | 6595 | |
dee91e82 DE |
6596 | /* die_reader_func for load_full_comp_unit. |
6597 | This is identical to read_signatured_type_reader, | |
6598 | but is kept separate for now. */ | |
c906108c | 6599 | |
dee91e82 DE |
6600 | static void |
6601 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
6602 | gdb_byte *info_ptr, | |
6603 | struct die_info *comp_unit_die, | |
6604 | int has_children, | |
6605 | void *data) | |
6606 | { | |
6607 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 6608 | enum language *language_ptr = data; |
6caca83c | 6609 | |
dee91e82 DE |
6610 | gdb_assert (cu->die_hash == NULL); |
6611 | cu->die_hash = | |
6612 | htab_create_alloc_ex (cu->header.length / 12, | |
6613 | die_hash, | |
6614 | die_eq, | |
6615 | NULL, | |
6616 | &cu->comp_unit_obstack, | |
6617 | hashtab_obstack_allocate, | |
6618 | dummy_obstack_deallocate); | |
e142c38c | 6619 | |
dee91e82 DE |
6620 | if (has_children) |
6621 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
6622 | &info_ptr, comp_unit_die); | |
6623 | cu->dies = comp_unit_die; | |
6624 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
6625 | |
6626 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 6627 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 6628 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
6629 | or we won't be able to build types correctly. |
6630 | Similarly, if we do not read the producer, we can not apply | |
6631 | producer-specific interpretation. */ | |
95554aad | 6632 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 6633 | } |
10b3939b | 6634 | |
dee91e82 | 6635 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 6636 | |
dee91e82 | 6637 | static void |
95554aad TT |
6638 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
6639 | enum language pretend_language) | |
dee91e82 | 6640 | { |
3019eac3 | 6641 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 6642 | |
f4dc4d17 DE |
6643 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6644 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
6645 | } |
6646 | ||
3da10d80 KS |
6647 | /* Add a DIE to the delayed physname list. */ |
6648 | ||
6649 | static void | |
6650 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
6651 | const char *name, struct die_info *die, | |
6652 | struct dwarf2_cu *cu) | |
6653 | { | |
6654 | struct delayed_method_info mi; | |
6655 | mi.type = type; | |
6656 | mi.fnfield_index = fnfield_index; | |
6657 | mi.index = index; | |
6658 | mi.name = name; | |
6659 | mi.die = die; | |
6660 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
6661 | } | |
6662 | ||
6663 | /* A cleanup for freeing the delayed method list. */ | |
6664 | ||
6665 | static void | |
6666 | free_delayed_list (void *ptr) | |
6667 | { | |
6668 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
6669 | if (cu->method_list != NULL) | |
6670 | { | |
6671 | VEC_free (delayed_method_info, cu->method_list); | |
6672 | cu->method_list = NULL; | |
6673 | } | |
6674 | } | |
6675 | ||
6676 | /* Compute the physnames of any methods on the CU's method list. | |
6677 | ||
6678 | The computation of method physnames is delayed in order to avoid the | |
6679 | (bad) condition that one of the method's formal parameters is of an as yet | |
6680 | incomplete type. */ | |
6681 | ||
6682 | static void | |
6683 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
6684 | { | |
6685 | int i; | |
6686 | struct delayed_method_info *mi; | |
6687 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
6688 | { | |
1d06ead6 | 6689 | const char *physname; |
3da10d80 KS |
6690 | struct fn_fieldlist *fn_flp |
6691 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
1d06ead6 | 6692 | physname = dwarf2_physname ((char *) mi->name, mi->die, cu); |
3da10d80 KS |
6693 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
6694 | } | |
6695 | } | |
6696 | ||
a766d390 DE |
6697 | /* Go objects should be embedded in a DW_TAG_module DIE, |
6698 | and it's not clear if/how imported objects will appear. | |
6699 | To keep Go support simple until that's worked out, | |
6700 | go back through what we've read and create something usable. | |
6701 | We could do this while processing each DIE, and feels kinda cleaner, | |
6702 | but that way is more invasive. | |
6703 | This is to, for example, allow the user to type "p var" or "b main" | |
6704 | without having to specify the package name, and allow lookups | |
6705 | of module.object to work in contexts that use the expression | |
6706 | parser. */ | |
6707 | ||
6708 | static void | |
6709 | fixup_go_packaging (struct dwarf2_cu *cu) | |
6710 | { | |
6711 | char *package_name = NULL; | |
6712 | struct pending *list; | |
6713 | int i; | |
6714 | ||
6715 | for (list = global_symbols; list != NULL; list = list->next) | |
6716 | { | |
6717 | for (i = 0; i < list->nsyms; ++i) | |
6718 | { | |
6719 | struct symbol *sym = list->symbol[i]; | |
6720 | ||
6721 | if (SYMBOL_LANGUAGE (sym) == language_go | |
6722 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
6723 | { | |
6724 | char *this_package_name = go_symbol_package_name (sym); | |
6725 | ||
6726 | if (this_package_name == NULL) | |
6727 | continue; | |
6728 | if (package_name == NULL) | |
6729 | package_name = this_package_name; | |
6730 | else | |
6731 | { | |
6732 | if (strcmp (package_name, this_package_name) != 0) | |
6733 | complaint (&symfile_complaints, | |
6734 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 | 6735 | (SYMBOL_SYMTAB (sym) |
210bbc17 | 6736 | ? SYMBOL_SYMTAB (sym)->filename |
a766d390 DE |
6737 | : cu->objfile->name), |
6738 | this_package_name, package_name); | |
6739 | xfree (this_package_name); | |
6740 | } | |
6741 | } | |
6742 | } | |
6743 | } | |
6744 | ||
6745 | if (package_name != NULL) | |
6746 | { | |
6747 | struct objfile *objfile = cu->objfile; | |
6748 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, | |
6749 | package_name, objfile); | |
6750 | struct symbol *sym; | |
6751 | ||
6752 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
6753 | ||
6754 | sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol); | |
6755 | SYMBOL_SET_LANGUAGE (sym, language_go); | |
6756 | SYMBOL_SET_NAMES (sym, package_name, strlen (package_name), 1, objfile); | |
6757 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, | |
6758 | e.g., "main" finds the "main" module and not C's main(). */ | |
6759 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
6760 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
6761 | SYMBOL_TYPE (sym) = type; | |
6762 | ||
6763 | add_symbol_to_list (sym, &global_symbols); | |
6764 | ||
6765 | xfree (package_name); | |
6766 | } | |
6767 | } | |
6768 | ||
95554aad TT |
6769 | static void compute_symtab_includes (struct dwarf2_per_cu_data *per_cu); |
6770 | ||
6771 | /* Return the symtab for PER_CU. This works properly regardless of | |
6772 | whether we're using the index or psymtabs. */ | |
6773 | ||
6774 | static struct symtab * | |
6775 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
6776 | { | |
6777 | return (dwarf2_per_objfile->using_index | |
6778 | ? per_cu->v.quick->symtab | |
6779 | : per_cu->v.psymtab->symtab); | |
6780 | } | |
6781 | ||
6782 | /* A helper function for computing the list of all symbol tables | |
6783 | included by PER_CU. */ | |
6784 | ||
6785 | static void | |
6786 | recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result, | |
6787 | htab_t all_children, | |
6788 | struct dwarf2_per_cu_data *per_cu) | |
6789 | { | |
6790 | void **slot; | |
6791 | int ix; | |
6792 | struct dwarf2_per_cu_data *iter; | |
6793 | ||
6794 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
6795 | if (*slot != NULL) | |
6796 | { | |
6797 | /* This inclusion and its children have been processed. */ | |
6798 | return; | |
6799 | } | |
6800 | ||
6801 | *slot = per_cu; | |
6802 | /* Only add a CU if it has a symbol table. */ | |
6803 | if (get_symtab (per_cu) != NULL) | |
6804 | VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu); | |
6805 | ||
6806 | for (ix = 0; | |
f4dc4d17 | 6807 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs, ix, iter); |
95554aad TT |
6808 | ++ix) |
6809 | recursively_compute_inclusions (result, all_children, iter); | |
6810 | } | |
6811 | ||
6812 | /* Compute the symtab 'includes' fields for the symtab related to | |
6813 | PER_CU. */ | |
6814 | ||
6815 | static void | |
6816 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
6817 | { | |
f4dc4d17 DE |
6818 | gdb_assert (! per_cu->is_debug_types); |
6819 | ||
6820 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs)) | |
95554aad TT |
6821 | { |
6822 | int ix, len; | |
6823 | struct dwarf2_per_cu_data *iter; | |
6824 | VEC (dwarf2_per_cu_ptr) *result_children = NULL; | |
6825 | htab_t all_children; | |
6826 | struct symtab *symtab = get_symtab (per_cu); | |
6827 | ||
6828 | /* If we don't have a symtab, we can just skip this case. */ | |
6829 | if (symtab == NULL) | |
6830 | return; | |
6831 | ||
6832 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
6833 | NULL, xcalloc, xfree); | |
6834 | ||
6835 | for (ix = 0; | |
f4dc4d17 | 6836 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->s.imported_symtabs, |
95554aad TT |
6837 | ix, iter); |
6838 | ++ix) | |
6839 | recursively_compute_inclusions (&result_children, all_children, iter); | |
6840 | ||
6841 | /* Now we have a transitive closure of all the included CUs, so | |
6842 | we can convert it to a list of symtabs. */ | |
6843 | len = VEC_length (dwarf2_per_cu_ptr, result_children); | |
6844 | symtab->includes | |
6845 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
6846 | (len + 1) * sizeof (struct symtab *)); | |
6847 | for (ix = 0; | |
6848 | VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter); | |
6849 | ++ix) | |
6850 | symtab->includes[ix] = get_symtab (iter); | |
6851 | symtab->includes[len] = NULL; | |
6852 | ||
6853 | VEC_free (dwarf2_per_cu_ptr, result_children); | |
6854 | htab_delete (all_children); | |
6855 | } | |
6856 | } | |
6857 | ||
6858 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
6859 | read. */ | |
6860 | ||
6861 | static void | |
6862 | process_cu_includes (void) | |
6863 | { | |
6864 | int ix; | |
6865 | struct dwarf2_per_cu_data *iter; | |
6866 | ||
6867 | for (ix = 0; | |
6868 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
6869 | ix, iter); | |
6870 | ++ix) | |
f4dc4d17 DE |
6871 | { |
6872 | if (! iter->is_debug_types) | |
6873 | compute_symtab_includes (iter); | |
6874 | } | |
95554aad TT |
6875 | |
6876 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
6877 | } | |
6878 | ||
9cdd5dbd | 6879 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
6880 | already been loaded into memory. */ |
6881 | ||
6882 | static void | |
95554aad TT |
6883 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
6884 | enum language pretend_language) | |
10b3939b | 6885 | { |
10b3939b | 6886 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 6887 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
6888 | CORE_ADDR lowpc, highpc; |
6889 | struct symtab *symtab; | |
3da10d80 | 6890 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 6891 | CORE_ADDR baseaddr; |
4359dff1 | 6892 | struct block *static_block; |
10b3939b DJ |
6893 | |
6894 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
6895 | ||
10b3939b DJ |
6896 | buildsym_init (); |
6897 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 6898 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
6899 | |
6900 | cu->list_in_scope = &file_symbols; | |
c906108c | 6901 | |
95554aad TT |
6902 | cu->language = pretend_language; |
6903 | cu->language_defn = language_def (cu->language); | |
6904 | ||
c906108c | 6905 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 6906 | process_die (cu->dies, cu); |
c906108c | 6907 | |
a766d390 DE |
6908 | /* For now fudge the Go package. */ |
6909 | if (cu->language == language_go) | |
6910 | fixup_go_packaging (cu); | |
6911 | ||
3da10d80 KS |
6912 | /* Now that we have processed all the DIEs in the CU, all the types |
6913 | should be complete, and it should now be safe to compute all of the | |
6914 | physnames. */ | |
6915 | compute_delayed_physnames (cu); | |
6916 | do_cleanups (delayed_list_cleanup); | |
6917 | ||
fae299cd DC |
6918 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
6919 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
6920 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 6921 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 6922 | |
36586728 TT |
6923 | static_block |
6924 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, | |
6925 | per_cu->s.imported_symtabs != NULL); | |
4359dff1 JK |
6926 | |
6927 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
6928 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
6929 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
6930 | addrmap to help ensure it has an accurate map of pc values belonging to | |
6931 | this comp unit. */ | |
6932 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
6933 | ||
6934 | symtab = end_symtab_from_static_block (static_block, objfile, | |
6935 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 6936 | |
8be455d7 | 6937 | if (symtab != NULL) |
c906108c | 6938 | { |
df15bd07 | 6939 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 6940 | |
8be455d7 JK |
6941 | /* Set symtab language to language from DW_AT_language. If the |
6942 | compilation is from a C file generated by language preprocessors, do | |
6943 | not set the language if it was already deduced by start_subfile. */ | |
6944 | if (!(cu->language == language_c && symtab->language != language_c)) | |
6945 | symtab->language = cu->language; | |
6946 | ||
6947 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
6948 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
6949 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
6950 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
6951 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
6952 | |
6953 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
6954 | needed, it would be wrong due to missing DW_AT_producer there. | |
6955 | ||
6956 | Still one can confuse GDB by using non-standard GCC compilation | |
6957 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
6958 | */ | |
ab260dad | 6959 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 6960 | symtab->locations_valid = 1; |
e0d00bc7 JK |
6961 | |
6962 | if (gcc_4_minor >= 5) | |
6963 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
6964 | |
6965 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 6966 | } |
9291a0cd TT |
6967 | |
6968 | if (dwarf2_per_objfile->using_index) | |
6969 | per_cu->v.quick->symtab = symtab; | |
6970 | else | |
6971 | { | |
6972 | struct partial_symtab *pst = per_cu->v.psymtab; | |
6973 | pst->symtab = symtab; | |
6974 | pst->readin = 1; | |
6975 | } | |
c906108c | 6976 | |
95554aad TT |
6977 | /* Push it for inclusion processing later. */ |
6978 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
6979 | ||
c906108c | 6980 | do_cleanups (back_to); |
f4dc4d17 | 6981 | } |
45cfd468 | 6982 | |
f4dc4d17 DE |
6983 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
6984 | already been loaded into memory. */ | |
6985 | ||
6986 | static void | |
6987 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
6988 | enum language pretend_language) | |
6989 | { | |
6990 | struct dwarf2_cu *cu = per_cu->cu; | |
6991 | struct objfile *objfile = per_cu->objfile; | |
6992 | struct symtab *symtab; | |
6993 | struct cleanup *back_to, *delayed_list_cleanup; | |
6994 | ||
6995 | buildsym_init (); | |
6996 | back_to = make_cleanup (really_free_pendings, NULL); | |
6997 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
6998 | ||
6999 | cu->list_in_scope = &file_symbols; | |
7000 | ||
7001 | cu->language = pretend_language; | |
7002 | cu->language_defn = language_def (cu->language); | |
7003 | ||
7004 | /* The symbol tables are set up in read_type_unit_scope. */ | |
7005 | process_die (cu->dies, cu); | |
7006 | ||
7007 | /* For now fudge the Go package. */ | |
7008 | if (cu->language == language_go) | |
7009 | fixup_go_packaging (cu); | |
7010 | ||
7011 | /* Now that we have processed all the DIEs in the CU, all the types | |
7012 | should be complete, and it should now be safe to compute all of the | |
7013 | physnames. */ | |
7014 | compute_delayed_physnames (cu); | |
7015 | do_cleanups (delayed_list_cleanup); | |
7016 | ||
7017 | /* TUs share symbol tables. | |
7018 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
7019 | of it with end_expandable_symtab. Otherwise, complete the addition of |
7020 | this TU's symbols to the existing symtab. */ | |
f4dc4d17 | 7021 | if (per_cu->s.type_unit_group->primary_symtab == NULL) |
45cfd468 | 7022 | { |
f4dc4d17 DE |
7023 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
7024 | per_cu->s.type_unit_group->primary_symtab = symtab; | |
7025 | ||
7026 | if (symtab != NULL) | |
7027 | { | |
7028 | /* Set symtab language to language from DW_AT_language. If the | |
7029 | compilation is from a C file generated by language preprocessors, | |
7030 | do not set the language if it was already deduced by | |
7031 | start_subfile. */ | |
7032 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7033 | symtab->language = cu->language; | |
7034 | } | |
7035 | } | |
7036 | else | |
7037 | { | |
7038 | augment_type_symtab (objfile, | |
7039 | per_cu->s.type_unit_group->primary_symtab); | |
7040 | symtab = per_cu->s.type_unit_group->primary_symtab; | |
7041 | } | |
7042 | ||
7043 | if (dwarf2_per_objfile->using_index) | |
7044 | per_cu->v.quick->symtab = symtab; | |
7045 | else | |
7046 | { | |
7047 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7048 | pst->symtab = symtab; | |
7049 | pst->readin = 1; | |
45cfd468 | 7050 | } |
f4dc4d17 DE |
7051 | |
7052 | do_cleanups (back_to); | |
c906108c SS |
7053 | } |
7054 | ||
95554aad TT |
7055 | /* Process an imported unit DIE. */ |
7056 | ||
7057 | static void | |
7058 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
7059 | { | |
7060 | struct attribute *attr; | |
7061 | ||
f4dc4d17 DE |
7062 | /* For now we don't handle imported units in type units. */ |
7063 | if (cu->per_cu->is_debug_types) | |
7064 | { | |
7065 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7066 | " supported in type units [in module %s]"), | |
7067 | cu->objfile->name); | |
7068 | } | |
7069 | ||
95554aad TT |
7070 | attr = dwarf2_attr (die, DW_AT_import, cu); |
7071 | if (attr != NULL) | |
7072 | { | |
7073 | struct dwarf2_per_cu_data *per_cu; | |
7074 | struct symtab *imported_symtab; | |
7075 | sect_offset offset; | |
36586728 | 7076 | int is_dwz; |
95554aad TT |
7077 | |
7078 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
7079 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
7080 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad TT |
7081 | |
7082 | /* Queue the unit, if needed. */ | |
7083 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) | |
7084 | load_full_comp_unit (per_cu, cu->language); | |
7085 | ||
f4dc4d17 | 7086 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->s.imported_symtabs, |
95554aad TT |
7087 | per_cu); |
7088 | } | |
7089 | } | |
7090 | ||
c906108c SS |
7091 | /* Process a die and its children. */ |
7092 | ||
7093 | static void | |
e7c27a73 | 7094 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
7095 | { |
7096 | switch (die->tag) | |
7097 | { | |
7098 | case DW_TAG_padding: | |
7099 | break; | |
7100 | case DW_TAG_compile_unit: | |
95554aad | 7101 | case DW_TAG_partial_unit: |
e7c27a73 | 7102 | read_file_scope (die, cu); |
c906108c | 7103 | break; |
348e048f DE |
7104 | case DW_TAG_type_unit: |
7105 | read_type_unit_scope (die, cu); | |
7106 | break; | |
c906108c | 7107 | case DW_TAG_subprogram: |
c906108c | 7108 | case DW_TAG_inlined_subroutine: |
edb3359d | 7109 | read_func_scope (die, cu); |
c906108c SS |
7110 | break; |
7111 | case DW_TAG_lexical_block: | |
14898363 L |
7112 | case DW_TAG_try_block: |
7113 | case DW_TAG_catch_block: | |
e7c27a73 | 7114 | read_lexical_block_scope (die, cu); |
c906108c | 7115 | break; |
96408a79 SA |
7116 | case DW_TAG_GNU_call_site: |
7117 | read_call_site_scope (die, cu); | |
7118 | break; | |
c906108c | 7119 | case DW_TAG_class_type: |
680b30c7 | 7120 | case DW_TAG_interface_type: |
c906108c SS |
7121 | case DW_TAG_structure_type: |
7122 | case DW_TAG_union_type: | |
134d01f1 | 7123 | process_structure_scope (die, cu); |
c906108c SS |
7124 | break; |
7125 | case DW_TAG_enumeration_type: | |
134d01f1 | 7126 | process_enumeration_scope (die, cu); |
c906108c | 7127 | break; |
134d01f1 | 7128 | |
f792889a DJ |
7129 | /* These dies have a type, but processing them does not create |
7130 | a symbol or recurse to process the children. Therefore we can | |
7131 | read them on-demand through read_type_die. */ | |
c906108c | 7132 | case DW_TAG_subroutine_type: |
72019c9c | 7133 | case DW_TAG_set_type: |
c906108c | 7134 | case DW_TAG_array_type: |
c906108c | 7135 | case DW_TAG_pointer_type: |
c906108c | 7136 | case DW_TAG_ptr_to_member_type: |
c906108c | 7137 | case DW_TAG_reference_type: |
c906108c | 7138 | case DW_TAG_string_type: |
c906108c | 7139 | break; |
134d01f1 | 7140 | |
c906108c | 7141 | case DW_TAG_base_type: |
a02abb62 | 7142 | case DW_TAG_subrange_type: |
cb249c71 | 7143 | case DW_TAG_typedef: |
134d01f1 DJ |
7144 | /* Add a typedef symbol for the type definition, if it has a |
7145 | DW_AT_name. */ | |
f792889a | 7146 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 7147 | break; |
c906108c | 7148 | case DW_TAG_common_block: |
e7c27a73 | 7149 | read_common_block (die, cu); |
c906108c SS |
7150 | break; |
7151 | case DW_TAG_common_inclusion: | |
7152 | break; | |
d9fa45fe | 7153 | case DW_TAG_namespace: |
63d06c5c | 7154 | processing_has_namespace_info = 1; |
e7c27a73 | 7155 | read_namespace (die, cu); |
d9fa45fe | 7156 | break; |
5d7cb8df | 7157 | case DW_TAG_module: |
f55ee35c | 7158 | processing_has_namespace_info = 1; |
5d7cb8df JK |
7159 | read_module (die, cu); |
7160 | break; | |
d9fa45fe DC |
7161 | case DW_TAG_imported_declaration: |
7162 | case DW_TAG_imported_module: | |
63d06c5c | 7163 | processing_has_namespace_info = 1; |
27aa8d6a SW |
7164 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
7165 | || cu->language != language_fortran)) | |
7166 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
7167 | dwarf_tag_name (die->tag)); | |
7168 | read_import_statement (die, cu); | |
d9fa45fe | 7169 | break; |
95554aad TT |
7170 | |
7171 | case DW_TAG_imported_unit: | |
7172 | process_imported_unit_die (die, cu); | |
7173 | break; | |
7174 | ||
c906108c | 7175 | default: |
e7c27a73 | 7176 | new_symbol (die, NULL, cu); |
c906108c SS |
7177 | break; |
7178 | } | |
7179 | } | |
7180 | ||
94af9270 KS |
7181 | /* A helper function for dwarf2_compute_name which determines whether DIE |
7182 | needs to have the name of the scope prepended to the name listed in the | |
7183 | die. */ | |
7184 | ||
7185 | static int | |
7186 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
7187 | { | |
1c809c68 TT |
7188 | struct attribute *attr; |
7189 | ||
94af9270 KS |
7190 | switch (die->tag) |
7191 | { | |
7192 | case DW_TAG_namespace: | |
7193 | case DW_TAG_typedef: | |
7194 | case DW_TAG_class_type: | |
7195 | case DW_TAG_interface_type: | |
7196 | case DW_TAG_structure_type: | |
7197 | case DW_TAG_union_type: | |
7198 | case DW_TAG_enumeration_type: | |
7199 | case DW_TAG_enumerator: | |
7200 | case DW_TAG_subprogram: | |
7201 | case DW_TAG_member: | |
7202 | return 1; | |
7203 | ||
7204 | case DW_TAG_variable: | |
c2b0a229 | 7205 | case DW_TAG_constant: |
94af9270 KS |
7206 | /* We only need to prefix "globally" visible variables. These include |
7207 | any variable marked with DW_AT_external or any variable that | |
7208 | lives in a namespace. [Variables in anonymous namespaces | |
7209 | require prefixing, but they are not DW_AT_external.] */ | |
7210 | ||
7211 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
7212 | { | |
7213 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 7214 | |
94af9270 KS |
7215 | return die_needs_namespace (die_specification (die, &spec_cu), |
7216 | spec_cu); | |
7217 | } | |
7218 | ||
1c809c68 | 7219 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
7220 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
7221 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
7222 | return 0; |
7223 | /* A variable in a lexical block of some kind does not need a | |
7224 | namespace, even though in C++ such variables may be external | |
7225 | and have a mangled name. */ | |
7226 | if (die->parent->tag == DW_TAG_lexical_block | |
7227 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
7228 | || die->parent->tag == DW_TAG_catch_block |
7229 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
7230 | return 0; |
7231 | return 1; | |
94af9270 KS |
7232 | |
7233 | default: | |
7234 | return 0; | |
7235 | } | |
7236 | } | |
7237 | ||
98bfdba5 PA |
7238 | /* Retrieve the last character from a mem_file. */ |
7239 | ||
7240 | static void | |
7241 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
7242 | { | |
7243 | char *last_char_p = (char *) object; | |
7244 | ||
7245 | if (length > 0) | |
7246 | *last_char_p = buffer[length - 1]; | |
7247 | } | |
7248 | ||
94af9270 | 7249 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
7250 | compute the physname for the object, which include a method's: |
7251 | - formal parameters (C++/Java), | |
7252 | - receiver type (Go), | |
7253 | - return type (Java). | |
7254 | ||
7255 | The term "physname" is a bit confusing. | |
7256 | For C++, for example, it is the demangled name. | |
7257 | For Go, for example, it's the mangled name. | |
94af9270 | 7258 | |
af6b7be1 JB |
7259 | For Ada, return the DIE's linkage name rather than the fully qualified |
7260 | name. PHYSNAME is ignored.. | |
7261 | ||
94af9270 KS |
7262 | The result is allocated on the objfile_obstack and canonicalized. */ |
7263 | ||
7264 | static const char * | |
7265 | dwarf2_compute_name (char *name, struct die_info *die, struct dwarf2_cu *cu, | |
7266 | int physname) | |
7267 | { | |
bb5ed363 DE |
7268 | struct objfile *objfile = cu->objfile; |
7269 | ||
94af9270 KS |
7270 | if (name == NULL) |
7271 | name = dwarf2_name (die, cu); | |
7272 | ||
f55ee35c JK |
7273 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
7274 | compute it by typename_concat inside GDB. */ | |
7275 | if (cu->language == language_ada | |
7276 | || (cu->language == language_fortran && physname)) | |
7277 | { | |
7278 | /* For Ada unit, we prefer the linkage name over the name, as | |
7279 | the former contains the exported name, which the user expects | |
7280 | to be able to reference. Ideally, we want the user to be able | |
7281 | to reference this entity using either natural or linkage name, | |
7282 | but we haven't started looking at this enhancement yet. */ | |
7283 | struct attribute *attr; | |
7284 | ||
7285 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7286 | if (attr == NULL) | |
7287 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7288 | if (attr && DW_STRING (attr)) | |
7289 | return DW_STRING (attr); | |
7290 | } | |
7291 | ||
94af9270 KS |
7292 | /* These are the only languages we know how to qualify names in. */ |
7293 | if (name != NULL | |
f55ee35c JK |
7294 | && (cu->language == language_cplus || cu->language == language_java |
7295 | || cu->language == language_fortran)) | |
94af9270 KS |
7296 | { |
7297 | if (die_needs_namespace (die, cu)) | |
7298 | { | |
7299 | long length; | |
0d5cff50 | 7300 | const char *prefix; |
94af9270 KS |
7301 | struct ui_file *buf; |
7302 | ||
7303 | prefix = determine_prefix (die, cu); | |
7304 | buf = mem_fileopen (); | |
7305 | if (*prefix != '\0') | |
7306 | { | |
f55ee35c JK |
7307 | char *prefixed_name = typename_concat (NULL, prefix, name, |
7308 | physname, cu); | |
9a619af0 | 7309 | |
94af9270 KS |
7310 | fputs_unfiltered (prefixed_name, buf); |
7311 | xfree (prefixed_name); | |
7312 | } | |
7313 | else | |
62d5b8da | 7314 | fputs_unfiltered (name, buf); |
94af9270 | 7315 | |
98bfdba5 PA |
7316 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
7317 | as children with DW_TAG_template_type_param or | |
7318 | DW_TAG_value_type_param. If the latter, add them to the name | |
7319 | here. If the name already has template parameters, then | |
7320 | skip this step; some versions of GCC emit both, and | |
7321 | it is more efficient to use the pre-computed name. | |
7322 | ||
7323 | Something to keep in mind about this process: it is very | |
7324 | unlikely, or in some cases downright impossible, to produce | |
7325 | something that will match the mangled name of a function. | |
7326 | If the definition of the function has the same debug info, | |
7327 | we should be able to match up with it anyway. But fallbacks | |
7328 | using the minimal symbol, for instance to find a method | |
7329 | implemented in a stripped copy of libstdc++, will not work. | |
7330 | If we do not have debug info for the definition, we will have to | |
7331 | match them up some other way. | |
7332 | ||
7333 | When we do name matching there is a related problem with function | |
7334 | templates; two instantiated function templates are allowed to | |
7335 | differ only by their return types, which we do not add here. */ | |
7336 | ||
7337 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
7338 | { | |
7339 | struct attribute *attr; | |
7340 | struct die_info *child; | |
7341 | int first = 1; | |
7342 | ||
7343 | die->building_fullname = 1; | |
7344 | ||
7345 | for (child = die->child; child != NULL; child = child->sibling) | |
7346 | { | |
7347 | struct type *type; | |
12df843f | 7348 | LONGEST value; |
98bfdba5 PA |
7349 | gdb_byte *bytes; |
7350 | struct dwarf2_locexpr_baton *baton; | |
7351 | struct value *v; | |
7352 | ||
7353 | if (child->tag != DW_TAG_template_type_param | |
7354 | && child->tag != DW_TAG_template_value_param) | |
7355 | continue; | |
7356 | ||
7357 | if (first) | |
7358 | { | |
7359 | fputs_unfiltered ("<", buf); | |
7360 | first = 0; | |
7361 | } | |
7362 | else | |
7363 | fputs_unfiltered (", ", buf); | |
7364 | ||
7365 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
7366 | if (attr == NULL) | |
7367 | { | |
7368 | complaint (&symfile_complaints, | |
7369 | _("template parameter missing DW_AT_type")); | |
7370 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
7371 | continue; | |
7372 | } | |
7373 | type = die_type (child, cu); | |
7374 | ||
7375 | if (child->tag == DW_TAG_template_type_param) | |
7376 | { | |
79d43c61 | 7377 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
7378 | continue; |
7379 | } | |
7380 | ||
7381 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
7382 | if (attr == NULL) | |
7383 | { | |
7384 | complaint (&symfile_complaints, | |
3e43a32a MS |
7385 | _("template parameter missing " |
7386 | "DW_AT_const_value")); | |
98bfdba5 PA |
7387 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
7388 | continue; | |
7389 | } | |
7390 | ||
7391 | dwarf2_const_value_attr (attr, type, name, | |
7392 | &cu->comp_unit_obstack, cu, | |
7393 | &value, &bytes, &baton); | |
7394 | ||
7395 | if (TYPE_NOSIGN (type)) | |
7396 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
7397 | changed, this can use value_print instead. */ | |
7398 | c_printchar (value, type, buf); | |
7399 | else | |
7400 | { | |
7401 | struct value_print_options opts; | |
7402 | ||
7403 | if (baton != NULL) | |
7404 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
7405 | baton->data, | |
7406 | baton->size, | |
7407 | baton->per_cu); | |
7408 | else if (bytes != NULL) | |
7409 | { | |
7410 | v = allocate_value (type); | |
7411 | memcpy (value_contents_writeable (v), bytes, | |
7412 | TYPE_LENGTH (type)); | |
7413 | } | |
7414 | else | |
7415 | v = value_from_longest (type, value); | |
7416 | ||
3e43a32a MS |
7417 | /* Specify decimal so that we do not depend on |
7418 | the radix. */ | |
98bfdba5 PA |
7419 | get_formatted_print_options (&opts, 'd'); |
7420 | opts.raw = 1; | |
7421 | value_print (v, buf, &opts); | |
7422 | release_value (v); | |
7423 | value_free (v); | |
7424 | } | |
7425 | } | |
7426 | ||
7427 | die->building_fullname = 0; | |
7428 | ||
7429 | if (!first) | |
7430 | { | |
7431 | /* Close the argument list, with a space if necessary | |
7432 | (nested templates). */ | |
7433 | char last_char = '\0'; | |
7434 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
7435 | if (last_char == '>') | |
7436 | fputs_unfiltered (" >", buf); | |
7437 | else | |
7438 | fputs_unfiltered (">", buf); | |
7439 | } | |
7440 | } | |
7441 | ||
94af9270 KS |
7442 | /* For Java and C++ methods, append formal parameter type |
7443 | information, if PHYSNAME. */ | |
6e70227d | 7444 | |
94af9270 KS |
7445 | if (physname && die->tag == DW_TAG_subprogram |
7446 | && (cu->language == language_cplus | |
7447 | || cu->language == language_java)) | |
7448 | { | |
7449 | struct type *type = read_type_die (die, cu); | |
7450 | ||
79d43c61 TT |
7451 | c_type_print_args (type, buf, 1, cu->language, |
7452 | &type_print_raw_options); | |
94af9270 KS |
7453 | |
7454 | if (cu->language == language_java) | |
7455 | { | |
7456 | /* For java, we must append the return type to method | |
0963b4bd | 7457 | names. */ |
94af9270 KS |
7458 | if (die->tag == DW_TAG_subprogram) |
7459 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 7460 | 0, 0, &type_print_raw_options); |
94af9270 KS |
7461 | } |
7462 | else if (cu->language == language_cplus) | |
7463 | { | |
60430eff DJ |
7464 | /* Assume that an artificial first parameter is |
7465 | "this", but do not crash if it is not. RealView | |
7466 | marks unnamed (and thus unused) parameters as | |
7467 | artificial; there is no way to differentiate | |
7468 | the two cases. */ | |
94af9270 KS |
7469 | if (TYPE_NFIELDS (type) > 0 |
7470 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 7471 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
7472 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
7473 | 0)))) | |
94af9270 KS |
7474 | fputs_unfiltered (" const", buf); |
7475 | } | |
7476 | } | |
7477 | ||
bb5ed363 | 7478 | name = ui_file_obsavestring (buf, &objfile->objfile_obstack, |
94af9270 KS |
7479 | &length); |
7480 | ui_file_delete (buf); | |
7481 | ||
7482 | if (cu->language == language_cplus) | |
7483 | { | |
7484 | char *cname | |
7485 | = dwarf2_canonicalize_name (name, cu, | |
bb5ed363 | 7486 | &objfile->objfile_obstack); |
9a619af0 | 7487 | |
94af9270 KS |
7488 | if (cname != NULL) |
7489 | name = cname; | |
7490 | } | |
7491 | } | |
7492 | } | |
7493 | ||
7494 | return name; | |
7495 | } | |
7496 | ||
0114d602 DJ |
7497 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
7498 | If scope qualifiers are appropriate they will be added. The result | |
7499 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
94af9270 KS |
7500 | not have a name. NAME may either be from a previous call to |
7501 | dwarf2_name or NULL. | |
7502 | ||
0963b4bd | 7503 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
7504 | |
7505 | static const char * | |
94af9270 | 7506 | dwarf2_full_name (char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 7507 | { |
94af9270 KS |
7508 | return dwarf2_compute_name (name, die, cu, 0); |
7509 | } | |
0114d602 | 7510 | |
94af9270 KS |
7511 | /* Construct a physname for the given DIE in CU. NAME may either be |
7512 | from a previous call to dwarf2_name or NULL. The result will be | |
7513 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
7514 | name. | |
0114d602 | 7515 | |
94af9270 | 7516 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 7517 | |
94af9270 KS |
7518 | static const char * |
7519 | dwarf2_physname (char *name, struct die_info *die, struct dwarf2_cu *cu) | |
7520 | { | |
bb5ed363 | 7521 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
7522 | struct attribute *attr; |
7523 | const char *retval, *mangled = NULL, *canon = NULL; | |
7524 | struct cleanup *back_to; | |
7525 | int need_copy = 1; | |
7526 | ||
7527 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
7528 | on its own. */ | |
7529 | if (!die_needs_namespace (die, cu)) | |
7530 | return dwarf2_compute_name (name, die, cu, 1); | |
7531 | ||
7532 | back_to = make_cleanup (null_cleanup, NULL); | |
7533 | ||
7534 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7535 | if (!attr) | |
7536 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7537 | ||
7538 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
7539 | has computed. */ | |
7540 | if (attr && DW_STRING (attr)) | |
7541 | { | |
7542 | char *demangled; | |
7543 | ||
7544 | mangled = DW_STRING (attr); | |
7545 | ||
7546 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
7547 | type. It is easier for GDB users to search for such functions as | |
7548 | `name(params)' than `long name(params)'. In such case the minimal | |
7549 | symbol names do not match the full symbol names but for template | |
7550 | functions there is never a need to look up their definition from their | |
7551 | declaration so the only disadvantage remains the minimal symbol | |
7552 | variant `long name(params)' does not have the proper inferior type. | |
7553 | */ | |
7554 | ||
a766d390 DE |
7555 | if (cu->language == language_go) |
7556 | { | |
7557 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
7558 | new_symbol_full assumes we return the mangled name. | |
7559 | This just undoes that lie until things are cleaned up. */ | |
7560 | demangled = NULL; | |
7561 | } | |
7562 | else | |
7563 | { | |
7564 | demangled = cplus_demangle (mangled, | |
7565 | (DMGL_PARAMS | DMGL_ANSI | |
7566 | | (cu->language == language_java | |
7567 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
7568 | : DMGL_RET_DROP))); | |
7569 | } | |
900e11f9 JK |
7570 | if (demangled) |
7571 | { | |
7572 | make_cleanup (xfree, demangled); | |
7573 | canon = demangled; | |
7574 | } | |
7575 | else | |
7576 | { | |
7577 | canon = mangled; | |
7578 | need_copy = 0; | |
7579 | } | |
7580 | } | |
7581 | ||
7582 | if (canon == NULL || check_physname) | |
7583 | { | |
7584 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
7585 | ||
7586 | if (canon != NULL && strcmp (physname, canon) != 0) | |
7587 | { | |
7588 | /* It may not mean a bug in GDB. The compiler could also | |
7589 | compute DW_AT_linkage_name incorrectly. But in such case | |
7590 | GDB would need to be bug-to-bug compatible. */ | |
7591 | ||
7592 | complaint (&symfile_complaints, | |
7593 | _("Computed physname <%s> does not match demangled <%s> " | |
7594 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7595 | physname, canon, mangled, die->offset.sect_off, objfile->name); |
900e11f9 JK |
7596 | |
7597 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
7598 | is available here - over computed PHYSNAME. It is safer | |
7599 | against both buggy GDB and buggy compilers. */ | |
7600 | ||
7601 | retval = canon; | |
7602 | } | |
7603 | else | |
7604 | { | |
7605 | retval = physname; | |
7606 | need_copy = 0; | |
7607 | } | |
7608 | } | |
7609 | else | |
7610 | retval = canon; | |
7611 | ||
7612 | if (need_copy) | |
7613 | retval = obsavestring (retval, strlen (retval), | |
bb5ed363 | 7614 | &objfile->objfile_obstack); |
900e11f9 JK |
7615 | |
7616 | do_cleanups (back_to); | |
7617 | return retval; | |
0114d602 DJ |
7618 | } |
7619 | ||
27aa8d6a SW |
7620 | /* Read the import statement specified by the given die and record it. */ |
7621 | ||
7622 | static void | |
7623 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
7624 | { | |
bb5ed363 | 7625 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 7626 | struct attribute *import_attr; |
32019081 | 7627 | struct die_info *imported_die, *child_die; |
de4affc9 | 7628 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 7629 | const char *imported_name; |
794684b6 | 7630 | const char *imported_name_prefix; |
13387711 SW |
7631 | const char *canonical_name; |
7632 | const char *import_alias; | |
7633 | const char *imported_declaration = NULL; | |
794684b6 | 7634 | const char *import_prefix; |
32019081 JK |
7635 | VEC (const_char_ptr) *excludes = NULL; |
7636 | struct cleanup *cleanups; | |
13387711 SW |
7637 | |
7638 | char *temp; | |
27aa8d6a SW |
7639 | |
7640 | import_attr = dwarf2_attr (die, DW_AT_import, cu); | |
7641 | if (import_attr == NULL) | |
7642 | { | |
7643 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7644 | dwarf_tag_name (die->tag)); | |
7645 | return; | |
7646 | } | |
7647 | ||
de4affc9 CC |
7648 | imported_cu = cu; |
7649 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
7650 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
7651 | if (imported_name == NULL) |
7652 | { | |
7653 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
7654 | ||
7655 | The import in the following code: | |
7656 | namespace A | |
7657 | { | |
7658 | typedef int B; | |
7659 | } | |
7660 | ||
7661 | int main () | |
7662 | { | |
7663 | using A::B; | |
7664 | B b; | |
7665 | return b; | |
7666 | } | |
7667 | ||
7668 | ... | |
7669 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
7670 | <52> DW_AT_decl_file : 1 | |
7671 | <53> DW_AT_decl_line : 6 | |
7672 | <54> DW_AT_import : <0x75> | |
7673 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
7674 | <59> DW_AT_name : B | |
7675 | <5b> DW_AT_decl_file : 1 | |
7676 | <5c> DW_AT_decl_line : 2 | |
7677 | <5d> DW_AT_type : <0x6e> | |
7678 | ... | |
7679 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
7680 | <76> DW_AT_byte_size : 4 | |
7681 | <77> DW_AT_encoding : 5 (signed) | |
7682 | ||
7683 | imports the wrong die ( 0x75 instead of 0x58 ). | |
7684 | This case will be ignored until the gcc bug is fixed. */ | |
7685 | return; | |
7686 | } | |
7687 | ||
82856980 SW |
7688 | /* Figure out the local name after import. */ |
7689 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 7690 | |
794684b6 SW |
7691 | /* Figure out where the statement is being imported to. */ |
7692 | import_prefix = determine_prefix (die, cu); | |
7693 | ||
7694 | /* Figure out what the scope of the imported die is and prepend it | |
7695 | to the name of the imported die. */ | |
de4affc9 | 7696 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 7697 | |
f55ee35c JK |
7698 | if (imported_die->tag != DW_TAG_namespace |
7699 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 7700 | { |
13387711 SW |
7701 | imported_declaration = imported_name; |
7702 | canonical_name = imported_name_prefix; | |
794684b6 | 7703 | } |
13387711 | 7704 | else if (strlen (imported_name_prefix) > 0) |
794684b6 | 7705 | { |
13387711 SW |
7706 | temp = alloca (strlen (imported_name_prefix) |
7707 | + 2 + strlen (imported_name) + 1); | |
7708 | strcpy (temp, imported_name_prefix); | |
7709 | strcat (temp, "::"); | |
7710 | strcat (temp, imported_name); | |
7711 | canonical_name = temp; | |
794684b6 | 7712 | } |
13387711 SW |
7713 | else |
7714 | canonical_name = imported_name; | |
794684b6 | 7715 | |
32019081 JK |
7716 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
7717 | ||
7718 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
7719 | for (child_die = die->child; child_die && child_die->tag; | |
7720 | child_die = sibling_die (child_die)) | |
7721 | { | |
7722 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
7723 | represented by an imported module entry with an import attribute | |
7724 | referring to the module and owned entries corresponding to those | |
7725 | entities that are renamed as part of being imported. */ | |
7726 | ||
7727 | if (child_die->tag != DW_TAG_imported_declaration) | |
7728 | { | |
7729 | complaint (&symfile_complaints, | |
7730 | _("child DW_TAG_imported_declaration expected " | |
7731 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7732 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7733 | continue; |
7734 | } | |
7735 | ||
7736 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
7737 | if (import_attr == NULL) | |
7738 | { | |
7739 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7740 | dwarf_tag_name (child_die->tag)); | |
7741 | continue; | |
7742 | } | |
7743 | ||
7744 | imported_cu = cu; | |
7745 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
7746 | &imported_cu); | |
7747 | imported_name = dwarf2_name (imported_die, imported_cu); | |
7748 | if (imported_name == NULL) | |
7749 | { | |
7750 | complaint (&symfile_complaints, | |
7751 | _("child DW_TAG_imported_declaration has unknown " | |
7752 | "imported name - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7753 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7754 | continue; |
7755 | } | |
7756 | ||
7757 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
7758 | ||
7759 | process_die (child_die, cu); | |
7760 | } | |
7761 | ||
c0cc3a76 SW |
7762 | cp_add_using_directive (import_prefix, |
7763 | canonical_name, | |
7764 | import_alias, | |
13387711 | 7765 | imported_declaration, |
32019081 | 7766 | excludes, |
bb5ed363 | 7767 | &objfile->objfile_obstack); |
32019081 JK |
7768 | |
7769 | do_cleanups (cleanups); | |
27aa8d6a SW |
7770 | } |
7771 | ||
f4dc4d17 | 7772 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 7773 | |
cb1df416 DJ |
7774 | static void |
7775 | free_cu_line_header (void *arg) | |
7776 | { | |
7777 | struct dwarf2_cu *cu = arg; | |
7778 | ||
7779 | free_line_header (cu->line_header); | |
7780 | cu->line_header = NULL; | |
7781 | } | |
7782 | ||
1b80a9fa JK |
7783 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
7784 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
7785 | this, it was first present in GCC release 4.3.0. */ | |
7786 | ||
7787 | static int | |
7788 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
7789 | { | |
7790 | if (!cu->checked_producer) | |
7791 | check_producer (cu); | |
7792 | ||
7793 | return cu->producer_is_gcc_lt_4_3; | |
7794 | } | |
7795 | ||
9291a0cd TT |
7796 | static void |
7797 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
7798 | char **name, char **comp_dir) | |
7799 | { | |
7800 | struct attribute *attr; | |
7801 | ||
7802 | *name = NULL; | |
7803 | *comp_dir = NULL; | |
7804 | ||
7805 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
7806 | is not a source language identifier. */ | |
7807 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
7808 | if (attr) | |
7809 | { | |
7810 | *name = DW_STRING (attr); | |
7811 | } | |
7812 | ||
7813 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
7814 | if (attr) | |
7815 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
7816 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
7817 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd TT |
7818 | { |
7819 | *comp_dir = ldirname (*name); | |
7820 | if (*comp_dir != NULL) | |
7821 | make_cleanup (xfree, *comp_dir); | |
7822 | } | |
7823 | if (*comp_dir != NULL) | |
7824 | { | |
7825 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
7826 | directory, get rid of it. */ | |
7827 | char *cp = strchr (*comp_dir, ':'); | |
7828 | ||
7829 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
7830 | *comp_dir = cp + 1; | |
7831 | } | |
7832 | ||
7833 | if (*name == NULL) | |
7834 | *name = "<unknown>"; | |
7835 | } | |
7836 | ||
f4dc4d17 DE |
7837 | /* Handle DW_AT_stmt_list for a compilation unit. |
7838 | DIE is the DW_TAG_compile_unit die for CU. | |
f3f5162e DE |
7839 | COMP_DIR is the compilation directory. |
7840 | WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */ | |
2ab95328 TT |
7841 | |
7842 | static void | |
7843 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
f4dc4d17 | 7844 | const char *comp_dir) |
2ab95328 TT |
7845 | { |
7846 | struct attribute *attr; | |
2ab95328 | 7847 | |
f4dc4d17 DE |
7848 | gdb_assert (! cu->per_cu->is_debug_types); |
7849 | ||
2ab95328 TT |
7850 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
7851 | if (attr) | |
7852 | { | |
7853 | unsigned int line_offset = DW_UNSND (attr); | |
7854 | struct line_header *line_header | |
3019eac3 | 7855 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
7856 | |
7857 | if (line_header) | |
dee91e82 DE |
7858 | { |
7859 | cu->line_header = line_header; | |
7860 | make_cleanup (free_cu_line_header, cu); | |
f4dc4d17 | 7861 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1); |
dee91e82 | 7862 | } |
2ab95328 TT |
7863 | } |
7864 | } | |
7865 | ||
95554aad | 7866 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 7867 | |
c906108c | 7868 | static void |
e7c27a73 | 7869 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 7870 | { |
dee91e82 | 7871 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 7872 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 7873 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
7874 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
7875 | struct attribute *attr; | |
e1024ff1 | 7876 | char *name = NULL; |
c906108c SS |
7877 | char *comp_dir = NULL; |
7878 | struct die_info *child_die; | |
7879 | bfd *abfd = objfile->obfd; | |
e142c38c | 7880 | CORE_ADDR baseaddr; |
6e70227d | 7881 | |
e142c38c | 7882 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 7883 | |
fae299cd | 7884 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
7885 | |
7886 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
7887 | from finish_block. */ | |
2acceee2 | 7888 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
7889 | lowpc = highpc; |
7890 | lowpc += baseaddr; | |
7891 | highpc += baseaddr; | |
7892 | ||
9291a0cd | 7893 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 7894 | |
95554aad | 7895 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 7896 | |
f4b8a18d KW |
7897 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
7898 | standardised yet. As a workaround for the language detection we fall | |
7899 | back to the DW_AT_producer string. */ | |
7900 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
7901 | cu->language = language_opencl; | |
7902 | ||
3019eac3 DE |
7903 | /* Similar hack for Go. */ |
7904 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
7905 | set_cu_language (DW_LANG_Go, cu); | |
7906 | ||
f4dc4d17 | 7907 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
7908 | |
7909 | /* Decode line number information if present. We do this before | |
7910 | processing child DIEs, so that the line header table is available | |
7911 | for DW_AT_decl_file. */ | |
f4dc4d17 | 7912 | handle_DW_AT_stmt_list (die, cu, comp_dir); |
3019eac3 DE |
7913 | |
7914 | /* Process all dies in compilation unit. */ | |
7915 | if (die->child != NULL) | |
7916 | { | |
7917 | child_die = die->child; | |
7918 | while (child_die && child_die->tag) | |
7919 | { | |
7920 | process_die (child_die, cu); | |
7921 | child_die = sibling_die (child_die); | |
7922 | } | |
7923 | } | |
7924 | ||
7925 | /* Decode macro information, if present. Dwarf 2 macro information | |
7926 | refers to information in the line number info statement program | |
7927 | header, so we can only read it if we've read the header | |
7928 | successfully. */ | |
7929 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
7930 | if (attr && cu->line_header) | |
7931 | { | |
7932 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
7933 | complaint (&symfile_complaints, | |
7934 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
7935 | ||
09262596 | 7936 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
7937 | } |
7938 | else | |
7939 | { | |
7940 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
7941 | if (attr && cu->line_header) | |
7942 | { | |
7943 | unsigned int macro_offset = DW_UNSND (attr); | |
7944 | ||
09262596 | 7945 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
7946 | } |
7947 | } | |
7948 | ||
7949 | do_cleanups (back_to); | |
7950 | } | |
7951 | ||
f4dc4d17 DE |
7952 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
7953 | Create the set of symtabs used by this TU, or if this TU is sharing | |
7954 | symtabs with another TU and the symtabs have already been created | |
7955 | then restore those symtabs in the line header. | |
7956 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
7957 | |
7958 | static void | |
f4dc4d17 | 7959 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 7960 | { |
f4dc4d17 DE |
7961 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7962 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
7963 | struct type_unit_group *tu_group; | |
7964 | int first_time; | |
7965 | struct line_header *lh; | |
3019eac3 | 7966 | struct attribute *attr; |
f4dc4d17 | 7967 | unsigned int i, line_offset; |
3019eac3 | 7968 | |
f4dc4d17 | 7969 | gdb_assert (per_cu->is_debug_types); |
3019eac3 | 7970 | |
f4dc4d17 | 7971 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 7972 | |
f4dc4d17 DE |
7973 | /* If we're using .gdb_index (includes -readnow) then |
7974 | per_cu->s.type_unit_group may not have been set up yet. */ | |
7975 | if (per_cu->s.type_unit_group == NULL) | |
094b34ac | 7976 | per_cu->s.type_unit_group = get_type_unit_group (cu, attr); |
f4dc4d17 DE |
7977 | tu_group = per_cu->s.type_unit_group; |
7978 | ||
7979 | /* If we've already processed this stmt_list there's no real need to | |
7980 | do it again, we could fake it and just recreate the part we need | |
7981 | (file name,index -> symtab mapping). If data shows this optimization | |
7982 | is useful we can do it then. */ | |
7983 | first_time = tu_group->primary_symtab == NULL; | |
7984 | ||
7985 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
7986 | debug info. */ | |
7987 | lh = NULL; | |
7988 | if (attr != NULL) | |
3019eac3 | 7989 | { |
f4dc4d17 DE |
7990 | line_offset = DW_UNSND (attr); |
7991 | lh = dwarf_decode_line_header (line_offset, cu); | |
7992 | } | |
7993 | if (lh == NULL) | |
7994 | { | |
7995 | if (first_time) | |
7996 | dwarf2_start_symtab (cu, "", NULL, 0); | |
7997 | else | |
7998 | { | |
7999 | gdb_assert (tu_group->symtabs == NULL); | |
8000 | restart_symtab (0); | |
8001 | } | |
8002 | /* Note: The primary symtab will get allocated at the end. */ | |
8003 | return; | |
3019eac3 DE |
8004 | } |
8005 | ||
f4dc4d17 DE |
8006 | cu->line_header = lh; |
8007 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 8008 | |
f4dc4d17 DE |
8009 | if (first_time) |
8010 | { | |
8011 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 8012 | |
f4dc4d17 DE |
8013 | tu_group->num_symtabs = lh->num_file_names; |
8014 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 8015 | |
f4dc4d17 DE |
8016 | for (i = 0; i < lh->num_file_names; ++i) |
8017 | { | |
8018 | char *dir = NULL; | |
8019 | struct file_entry *fe = &lh->file_names[i]; | |
3019eac3 | 8020 | |
f4dc4d17 DE |
8021 | if (fe->dir_index) |
8022 | dir = lh->include_dirs[fe->dir_index - 1]; | |
8023 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 8024 | |
f4dc4d17 DE |
8025 | /* Note: We don't have to watch for the main subfile here, type units |
8026 | don't have DW_AT_name. */ | |
3019eac3 | 8027 | |
f4dc4d17 DE |
8028 | if (current_subfile->symtab == NULL) |
8029 | { | |
8030 | /* NOTE: start_subfile will recognize when it's been passed | |
8031 | a file it has already seen. So we can't assume there's a | |
8032 | simple mapping from lh->file_names to subfiles, | |
8033 | lh->file_names may contain dups. */ | |
8034 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
8035 | objfile); | |
8036 | } | |
8037 | ||
8038 | fe->symtab = current_subfile->symtab; | |
8039 | tu_group->symtabs[i] = fe->symtab; | |
8040 | } | |
8041 | } | |
8042 | else | |
3019eac3 | 8043 | { |
f4dc4d17 DE |
8044 | restart_symtab (0); |
8045 | ||
8046 | for (i = 0; i < lh->num_file_names; ++i) | |
8047 | { | |
8048 | struct file_entry *fe = &lh->file_names[i]; | |
8049 | ||
8050 | fe->symtab = tu_group->symtabs[i]; | |
8051 | } | |
3019eac3 DE |
8052 | } |
8053 | ||
f4dc4d17 DE |
8054 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
8055 | so they don't have a "real" (so to speak) symtab anyway. | |
8056 | There is later code that will assign the main symtab to all symbols | |
8057 | that don't have one. We need to handle the case of a symbol with a | |
8058 | missing symtab (DW_AT_decl_file) anyway. */ | |
8059 | } | |
3019eac3 | 8060 | |
f4dc4d17 DE |
8061 | /* Process DW_TAG_type_unit. |
8062 | For TUs we want to skip the first top level sibling if it's not the | |
8063 | actual type being defined by this TU. In this case the first top | |
8064 | level sibling is there to provide context only. */ | |
3019eac3 | 8065 | |
f4dc4d17 DE |
8066 | static void |
8067 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
8068 | { | |
8069 | struct die_info *child_die; | |
3019eac3 | 8070 | |
f4dc4d17 DE |
8071 | prepare_one_comp_unit (cu, die, language_minimal); |
8072 | ||
8073 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
8074 | We do this before processing child DIEs, so that the line header table | |
8075 | is available for DW_AT_decl_file. */ | |
8076 | setup_type_unit_groups (die, cu); | |
8077 | ||
8078 | if (die->child != NULL) | |
8079 | { | |
8080 | child_die = die->child; | |
8081 | while (child_die && child_die->tag) | |
8082 | { | |
8083 | process_die (child_die, cu); | |
8084 | child_die = sibling_die (child_die); | |
8085 | } | |
8086 | } | |
3019eac3 DE |
8087 | } |
8088 | \f | |
80626a55 DE |
8089 | /* DWO/DWP files. |
8090 | ||
8091 | http://gcc.gnu.org/wiki/DebugFission | |
8092 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
8093 | ||
8094 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
8095 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
8096 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
8097 | |
8098 | static hashval_t | |
8099 | hash_dwo_file (const void *item) | |
8100 | { | |
8101 | const struct dwo_file *dwo_file = item; | |
8102 | ||
80626a55 | 8103 | return htab_hash_string (dwo_file->name); |
3019eac3 DE |
8104 | } |
8105 | ||
8106 | static int | |
8107 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
8108 | { | |
8109 | const struct dwo_file *lhs = item_lhs; | |
8110 | const struct dwo_file *rhs = item_rhs; | |
8111 | ||
80626a55 | 8112 | return strcmp (lhs->name, rhs->name) == 0; |
3019eac3 DE |
8113 | } |
8114 | ||
8115 | /* Allocate a hash table for DWO files. */ | |
8116 | ||
8117 | static htab_t | |
8118 | allocate_dwo_file_hash_table (void) | |
8119 | { | |
8120 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8121 | ||
8122 | return htab_create_alloc_ex (41, | |
8123 | hash_dwo_file, | |
8124 | eq_dwo_file, | |
8125 | NULL, | |
8126 | &objfile->objfile_obstack, | |
8127 | hashtab_obstack_allocate, | |
8128 | dummy_obstack_deallocate); | |
8129 | } | |
8130 | ||
80626a55 DE |
8131 | /* Lookup DWO file DWO_NAME. */ |
8132 | ||
8133 | static void ** | |
8134 | lookup_dwo_file_slot (const char *dwo_name) | |
8135 | { | |
8136 | struct dwo_file find_entry; | |
8137 | void **slot; | |
8138 | ||
8139 | if (dwarf2_per_objfile->dwo_files == NULL) | |
8140 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
8141 | ||
8142 | memset (&find_entry, 0, sizeof (find_entry)); | |
8143 | find_entry.name = dwo_name; | |
8144 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); | |
8145 | ||
8146 | return slot; | |
8147 | } | |
8148 | ||
3019eac3 DE |
8149 | static hashval_t |
8150 | hash_dwo_unit (const void *item) | |
8151 | { | |
8152 | const struct dwo_unit *dwo_unit = item; | |
8153 | ||
8154 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
8155 | return dwo_unit->signature; | |
8156 | } | |
8157 | ||
8158 | static int | |
8159 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
8160 | { | |
8161 | const struct dwo_unit *lhs = item_lhs; | |
8162 | const struct dwo_unit *rhs = item_rhs; | |
8163 | ||
8164 | /* The signature is assumed to be unique within the DWO file. | |
8165 | So while object file CU dwo_id's always have the value zero, | |
8166 | that's OK, assuming each object file DWO file has only one CU, | |
8167 | and that's the rule for now. */ | |
8168 | return lhs->signature == rhs->signature; | |
8169 | } | |
8170 | ||
8171 | /* Allocate a hash table for DWO CUs,TUs. | |
8172 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
8173 | ||
8174 | static htab_t | |
8175 | allocate_dwo_unit_table (struct objfile *objfile) | |
8176 | { | |
8177 | /* Start out with a pretty small number. | |
8178 | Generally DWO files contain only one CU and maybe some TUs. */ | |
8179 | return htab_create_alloc_ex (3, | |
8180 | hash_dwo_unit, | |
8181 | eq_dwo_unit, | |
8182 | NULL, | |
8183 | &objfile->objfile_obstack, | |
8184 | hashtab_obstack_allocate, | |
8185 | dummy_obstack_deallocate); | |
8186 | } | |
8187 | ||
80626a55 | 8188 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 DE |
8189 | |
8190 | struct create_dwo_info_table_data | |
8191 | { | |
8192 | struct dwo_file *dwo_file; | |
8193 | htab_t cu_htab; | |
8194 | }; | |
8195 | ||
80626a55 | 8196 | /* die_reader_func for create_dwo_debug_info_hash_table. */ |
3019eac3 DE |
8197 | |
8198 | static void | |
80626a55 DE |
8199 | create_dwo_debug_info_hash_table_reader (const struct die_reader_specs *reader, |
8200 | gdb_byte *info_ptr, | |
8201 | struct die_info *comp_unit_die, | |
8202 | int has_children, | |
8203 | void *datap) | |
3019eac3 DE |
8204 | { |
8205 | struct dwarf2_cu *cu = reader->cu; | |
8206 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8207 | sect_offset offset = cu->per_cu->offset; | |
8208 | struct dwarf2_section_info *section = cu->per_cu->info_or_types_section; | |
8209 | struct create_dwo_info_table_data *data = datap; | |
8210 | struct dwo_file *dwo_file = data->dwo_file; | |
8211 | htab_t cu_htab = data->cu_htab; | |
8212 | void **slot; | |
8213 | struct attribute *attr; | |
8214 | struct dwo_unit *dwo_unit; | |
8215 | ||
8216 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
8217 | if (attr == NULL) | |
8218 | { | |
8219 | error (_("Dwarf Error: debug entry at offset 0x%x is missing" | |
8220 | " its dwo_id [in module %s]"), | |
80626a55 | 8221 | offset.sect_off, dwo_file->name); |
3019eac3 DE |
8222 | return; |
8223 | } | |
8224 | ||
8225 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8226 | dwo_unit->dwo_file = dwo_file; | |
8227 | dwo_unit->signature = DW_UNSND (attr); | |
8228 | dwo_unit->info_or_types_section = section; | |
8229 | dwo_unit->offset = offset; | |
8230 | dwo_unit->length = cu->per_cu->length; | |
8231 | ||
8232 | slot = htab_find_slot (cu_htab, dwo_unit, INSERT); | |
8233 | gdb_assert (slot != NULL); | |
8234 | if (*slot != NULL) | |
8235 | { | |
8236 | const struct dwo_unit *dup_dwo_unit = *slot; | |
8237 | ||
8238 | complaint (&symfile_complaints, | |
8239 | _("debug entry at offset 0x%x is duplicate to the entry at" | |
8240 | " offset 0x%x, dwo_id 0x%s [in module %s]"), | |
8241 | offset.sect_off, dup_dwo_unit->offset.sect_off, | |
8242 | phex (dwo_unit->signature, sizeof (dwo_unit->signature)), | |
80626a55 | 8243 | dwo_file->name); |
3019eac3 DE |
8244 | } |
8245 | else | |
8246 | *slot = dwo_unit; | |
8247 | ||
09406207 | 8248 | if (dwarf2_read_debug) |
3019eac3 DE |
8249 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id 0x%s\n", |
8250 | offset.sect_off, | |
8251 | phex (dwo_unit->signature, | |
8252 | sizeof (dwo_unit->signature))); | |
8253 | } | |
8254 | ||
80626a55 DE |
8255 | /* Create a hash table to map DWO IDs to their CU entry in |
8256 | .debug_info.dwo in DWO_FILE. | |
8257 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 DE |
8258 | |
8259 | static htab_t | |
80626a55 | 8260 | create_dwo_debug_info_hash_table (struct dwo_file *dwo_file) |
3019eac3 DE |
8261 | { |
8262 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8263 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
8264 | bfd *abfd; | |
8265 | htab_t cu_htab; | |
8266 | gdb_byte *info_ptr, *end_ptr; | |
8267 | struct create_dwo_info_table_data create_dwo_info_table_data; | |
8268 | ||
8269 | dwarf2_read_section (objfile, section); | |
8270 | info_ptr = section->buffer; | |
8271 | ||
8272 | if (info_ptr == NULL) | |
8273 | return NULL; | |
8274 | ||
8275 | /* We can't set abfd until now because the section may be empty or | |
8276 | not present, in which case section->asection will be NULL. */ | |
8277 | abfd = section->asection->owner; | |
8278 | ||
09406207 | 8279 | if (dwarf2_read_debug) |
3019eac3 DE |
8280 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_info.dwo for %s:\n", |
8281 | bfd_get_filename (abfd)); | |
8282 | ||
8283 | cu_htab = allocate_dwo_unit_table (objfile); | |
8284 | ||
8285 | create_dwo_info_table_data.dwo_file = dwo_file; | |
8286 | create_dwo_info_table_data.cu_htab = cu_htab; | |
8287 | ||
8288 | end_ptr = info_ptr + section->size; | |
8289 | while (info_ptr < end_ptr) | |
8290 | { | |
8291 | struct dwarf2_per_cu_data per_cu; | |
8292 | ||
8293 | memset (&per_cu, 0, sizeof (per_cu)); | |
8294 | per_cu.objfile = objfile; | |
8295 | per_cu.is_debug_types = 0; | |
8296 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8297 | per_cu.info_or_types_section = section; | |
8298 | ||
8299 | init_cutu_and_read_dies_no_follow (&per_cu, | |
8300 | &dwo_file->sections.abbrev, | |
8301 | dwo_file, | |
80626a55 | 8302 | create_dwo_debug_info_hash_table_reader, |
3019eac3 DE |
8303 | &create_dwo_info_table_data); |
8304 | ||
8305 | info_ptr += per_cu.length; | |
8306 | } | |
8307 | ||
8308 | return cu_htab; | |
8309 | } | |
8310 | ||
80626a55 DE |
8311 | /* DWP file .debug_{cu,tu}_index section format: |
8312 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
8313 | ||
8314 | Both index sections have the same format, and serve to map a 64-bit | |
8315 | signature to a set of section numbers. Each section begins with a header, | |
8316 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
8317 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
8318 | aligned at 8-byte boundaries in the file. | |
8319 | ||
8320 | The index section header contains two unsigned 32-bit values (using the | |
8321 | byte order of the application binary): | |
8322 | ||
8323 | N, the number of compilation units or type units in the index | |
8324 | M, the number of slots in the hash table | |
8325 | ||
8326 | (We assume that N and M will not exceed 2^32 - 1.) | |
8327 | ||
8328 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
8329 | ||
8330 | The hash table begins at offset 8 in the section, and consists of an array | |
8331 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
8332 | order of the application binary). Unused slots in the hash table are 0. | |
8333 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
8334 | ||
8335 | The parallel table begins immediately after the hash table | |
8336 | (at offset 8 + 8 * M from the beginning of the section), and consists of an | |
8337 | array of 32-bit indexes (using the byte order of the application binary), | |
8338 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
8339 | table contains a 32-bit index into the pool of section numbers. For unused | |
8340 | hash table slots, the corresponding entry in the parallel table will be 0. | |
8341 | ||
8342 | Given a 64-bit compilation unit signature or a type signature S, an entry | |
8343 | in the hash table is located as follows: | |
8344 | ||
8345 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with | |
8346 | the low-order k bits all set to 1. | |
8347 | ||
8348 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). | |
8349 | ||
8350 | 3) If the hash table entry at index H matches the signature, use that | |
8351 | entry. If the hash table entry at index H is unused (all zeroes), | |
8352 | terminate the search: the signature is not present in the table. | |
8353 | ||
8354 | 4) Let H = (H + H') modulo M. Repeat at Step 3. | |
8355 | ||
8356 | Because M > N and H' and M are relatively prime, the search is guaranteed | |
8357 | to stop at an unused slot or find the match. | |
8358 | ||
8359 | The pool of section numbers begins immediately following the hash table | |
8360 | (at offset 8 + 12 * M from the beginning of the section). The pool of | |
8361 | section numbers consists of an array of 32-bit words (using the byte order | |
8362 | of the application binary). Each item in the array is indexed starting | |
8363 | from 0. The hash table entry provides the index of the first section | |
8364 | number in the set. Additional section numbers in the set follow, and the | |
8365 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
8366 | ||
8367 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
8368 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
8369 | be the second entry. Other members of the set may follow in any order. */ | |
8370 | ||
8371 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
8372 | .debug_{info,types}.dwo in DWP_FILE. | |
8373 | Returns NULL if there isn't one. | |
8374 | Note: This function processes DWP files only, not DWO files. */ | |
8375 | ||
8376 | static struct dwp_hash_table * | |
8377 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
8378 | { | |
8379 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8380 | bfd *dbfd = dwp_file->dbfd; | |
8381 | char *index_ptr, *index_end; | |
8382 | struct dwarf2_section_info *index; | |
8383 | uint32_t version, nr_units, nr_slots; | |
8384 | struct dwp_hash_table *htab; | |
8385 | ||
8386 | if (is_debug_types) | |
8387 | index = &dwp_file->sections.tu_index; | |
8388 | else | |
8389 | index = &dwp_file->sections.cu_index; | |
8390 | ||
8391 | if (dwarf2_section_empty_p (index)) | |
8392 | return NULL; | |
8393 | dwarf2_read_section (objfile, index); | |
8394 | ||
8395 | index_ptr = index->buffer; | |
8396 | index_end = index_ptr + index->size; | |
8397 | ||
8398 | version = read_4_bytes (dbfd, index_ptr); | |
8399 | index_ptr += 8; /* Skip the unused word. */ | |
8400 | nr_units = read_4_bytes (dbfd, index_ptr); | |
8401 | index_ptr += 4; | |
8402 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
8403 | index_ptr += 4; | |
8404 | ||
8405 | if (version != 1) | |
8406 | { | |
8407 | error (_("Dwarf Error: unsupported DWP file version (%u)" | |
8408 | " [in module %s]"), | |
8409 | version, dwp_file->name); | |
8410 | } | |
8411 | if (nr_slots != (nr_slots & -nr_slots)) | |
8412 | { | |
8413 | error (_("Dwarf Error: number of slots in DWP hash table (%u)" | |
8414 | " is not power of 2 [in module %s]"), | |
8415 | nr_slots, dwp_file->name); | |
8416 | } | |
8417 | ||
8418 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
8419 | htab->nr_units = nr_units; | |
8420 | htab->nr_slots = nr_slots; | |
8421 | htab->hash_table = index_ptr; | |
8422 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
8423 | htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
8424 | ||
8425 | return htab; | |
8426 | } | |
8427 | ||
8428 | /* Update SECTIONS with the data from SECTP. | |
8429 | ||
8430 | This function is like the other "locate" section routines that are | |
8431 | passed to bfd_map_over_sections, but in this context the sections to | |
8432 | read comes from the DWP hash table, not the full ELF section table. | |
8433 | ||
8434 | The result is non-zero for success, or zero if an error was found. */ | |
8435 | ||
8436 | static int | |
8437 | locate_virtual_dwo_sections (asection *sectp, | |
8438 | struct virtual_dwo_sections *sections) | |
8439 | { | |
8440 | const struct dwop_section_names *names = &dwop_section_names; | |
8441 | ||
8442 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
8443 | { | |
8444 | /* There can be only one. */ | |
8445 | if (sections->abbrev.asection != NULL) | |
8446 | return 0; | |
8447 | sections->abbrev.asection = sectp; | |
8448 | sections->abbrev.size = bfd_get_section_size (sectp); | |
8449 | } | |
8450 | else if (section_is_p (sectp->name, &names->info_dwo) | |
8451 | || section_is_p (sectp->name, &names->types_dwo)) | |
8452 | { | |
8453 | /* There can be only one. */ | |
8454 | if (sections->info_or_types.asection != NULL) | |
8455 | return 0; | |
8456 | sections->info_or_types.asection = sectp; | |
8457 | sections->info_or_types.size = bfd_get_section_size (sectp); | |
8458 | } | |
8459 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
8460 | { | |
8461 | /* There can be only one. */ | |
8462 | if (sections->line.asection != NULL) | |
8463 | return 0; | |
8464 | sections->line.asection = sectp; | |
8465 | sections->line.size = bfd_get_section_size (sectp); | |
8466 | } | |
8467 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
8468 | { | |
8469 | /* There can be only one. */ | |
8470 | if (sections->loc.asection != NULL) | |
8471 | return 0; | |
8472 | sections->loc.asection = sectp; | |
8473 | sections->loc.size = bfd_get_section_size (sectp); | |
8474 | } | |
8475 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
8476 | { | |
8477 | /* There can be only one. */ | |
8478 | if (sections->macinfo.asection != NULL) | |
8479 | return 0; | |
8480 | sections->macinfo.asection = sectp; | |
8481 | sections->macinfo.size = bfd_get_section_size (sectp); | |
8482 | } | |
8483 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
8484 | { | |
8485 | /* There can be only one. */ | |
8486 | if (sections->macro.asection != NULL) | |
8487 | return 0; | |
8488 | sections->macro.asection = sectp; | |
8489 | sections->macro.size = bfd_get_section_size (sectp); | |
8490 | } | |
8491 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
8492 | { | |
8493 | /* There can be only one. */ | |
8494 | if (sections->str_offsets.asection != NULL) | |
8495 | return 0; | |
8496 | sections->str_offsets.asection = sectp; | |
8497 | sections->str_offsets.size = bfd_get_section_size (sectp); | |
8498 | } | |
8499 | else | |
8500 | { | |
8501 | /* No other kind of section is valid. */ | |
8502 | return 0; | |
8503 | } | |
8504 | ||
8505 | return 1; | |
8506 | } | |
8507 | ||
8508 | /* Create a dwo_unit object for the DWO with signature SIGNATURE. | |
8509 | HTAB is the hash table from the DWP file. | |
8510 | SECTION_INDEX is the index of the DWO in HTAB. */ | |
8511 | ||
8512 | static struct dwo_unit * | |
8513 | create_dwo_in_dwp (struct dwp_file *dwp_file, | |
8514 | const struct dwp_hash_table *htab, | |
8515 | uint32_t section_index, | |
8516 | ULONGEST signature, int is_debug_types) | |
8517 | { | |
8518 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8519 | bfd *dbfd = dwp_file->dbfd; | |
8520 | const char *kind = is_debug_types ? "TU" : "CU"; | |
8521 | struct dwo_file *dwo_file; | |
8522 | struct dwo_unit *dwo_unit; | |
8523 | struct virtual_dwo_sections sections; | |
8524 | void **dwo_file_slot; | |
8525 | char *virtual_dwo_name; | |
8526 | struct dwarf2_section_info *cutu; | |
8527 | struct cleanup *cleanups; | |
8528 | int i; | |
8529 | ||
8530 | if (dwarf2_read_debug) | |
8531 | { | |
8532 | fprintf_unfiltered (gdb_stdlog, "Reading %s %u/0x%s in DWP file: %s\n", | |
8533 | kind, | |
8534 | section_index, phex (signature, sizeof (signature)), | |
8535 | dwp_file->name); | |
8536 | } | |
8537 | ||
8538 | /* Fetch the sections of this DWO. | |
8539 | Put a limit on the number of sections we look for so that bad data | |
8540 | doesn't cause us to loop forever. */ | |
8541 | ||
8542 | #define MAX_NR_DWO_SECTIONS \ | |
8543 | (1 /* .debug_info or .debug_types */ \ | |
8544 | + 1 /* .debug_abbrev */ \ | |
8545 | + 1 /* .debug_line */ \ | |
8546 | + 1 /* .debug_loc */ \ | |
8547 | + 1 /* .debug_str_offsets */ \ | |
8548 | + 1 /* .debug_macro */ \ | |
8549 | + 1 /* .debug_macinfo */ \ | |
8550 | + 1 /* trailing zero */) | |
8551 | ||
8552 | memset (§ions, 0, sizeof (sections)); | |
8553 | cleanups = make_cleanup (null_cleanup, 0); | |
8554 | ||
8555 | for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i) | |
8556 | { | |
8557 | asection *sectp; | |
8558 | uint32_t section_nr = | |
8559 | read_4_bytes (dbfd, | |
8560 | htab->section_pool | |
8561 | + (section_index + i) * sizeof (uint32_t)); | |
8562 | ||
8563 | if (section_nr == 0) | |
8564 | break; | |
8565 | if (section_nr >= dwp_file->num_sections) | |
8566 | { | |
8567 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
8568 | " [in module %s]"), | |
8569 | dwp_file->name); | |
8570 | } | |
8571 | ||
8572 | sectp = dwp_file->elf_sections[section_nr]; | |
8573 | if (! locate_virtual_dwo_sections (sectp, §ions)) | |
8574 | { | |
8575 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
8576 | " [in module %s]"), | |
8577 | dwp_file->name); | |
8578 | } | |
8579 | } | |
8580 | ||
8581 | if (i < 2 | |
8582 | || sections.info_or_types.asection == NULL | |
8583 | || sections.abbrev.asection == NULL) | |
8584 | { | |
8585 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
8586 | " [in module %s]"), | |
8587 | dwp_file->name); | |
8588 | } | |
8589 | if (i == MAX_NR_DWO_SECTIONS) | |
8590 | { | |
8591 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
8592 | " [in module %s]"), | |
8593 | dwp_file->name); | |
8594 | } | |
8595 | ||
8596 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
8597 | have dwo_unit "live" in that. At least for now. | |
8598 | ||
8599 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec DE |
8600 | However, for each CU + set of TUs that came from the same original DWO |
8601 | file, we want to combine them back into a virtual DWO file to save space | |
80626a55 DE |
8602 | (fewer struct dwo_file objects to allocated). Remember that for really |
8603 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
8604 | ||
2792b94d PM |
8605 | virtual_dwo_name = |
8606 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
8607 | sections.abbrev.asection ? sections.abbrev.asection->id : 0, | |
8608 | sections.line.asection ? sections.line.asection->id : 0, | |
8609 | sections.loc.asection ? sections.loc.asection->id : 0, | |
8610 | (sections.str_offsets.asection | |
8611 | ? sections.str_offsets.asection->id | |
8612 | : 0)); | |
80626a55 DE |
8613 | make_cleanup (xfree, virtual_dwo_name); |
8614 | /* Can we use an existing virtual DWO file? */ | |
8615 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name); | |
8616 | /* Create one if necessary. */ | |
8617 | if (*dwo_file_slot == NULL) | |
8618 | { | |
8619 | if (dwarf2_read_debug) | |
8620 | { | |
8621 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
8622 | virtual_dwo_name); | |
8623 | } | |
8624 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
8625 | dwo_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
8626 | virtual_dwo_name, | |
8627 | strlen (virtual_dwo_name)); | |
8628 | dwo_file->sections.abbrev = sections.abbrev; | |
8629 | dwo_file->sections.line = sections.line; | |
8630 | dwo_file->sections.loc = sections.loc; | |
8631 | dwo_file->sections.macinfo = sections.macinfo; | |
8632 | dwo_file->sections.macro = sections.macro; | |
8633 | dwo_file->sections.str_offsets = sections.str_offsets; | |
8634 | /* The "str" section is global to the entire DWP file. */ | |
8635 | dwo_file->sections.str = dwp_file->sections.str; | |
8636 | /* The info or types section is assigned later to dwo_unit, | |
8637 | there's no need to record it in dwo_file. | |
8638 | Also, we can't simply record type sections in dwo_file because | |
8639 | we record a pointer into the vector in dwo_unit. As we collect more | |
8640 | types we'll grow the vector and eventually have to reallocate space | |
8641 | for it, invalidating all the pointers into the current copy. */ | |
8642 | *dwo_file_slot = dwo_file; | |
8643 | } | |
8644 | else | |
8645 | { | |
8646 | if (dwarf2_read_debug) | |
8647 | { | |
8648 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
8649 | virtual_dwo_name); | |
8650 | } | |
8651 | dwo_file = *dwo_file_slot; | |
8652 | } | |
8653 | do_cleanups (cleanups); | |
8654 | ||
8655 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8656 | dwo_unit->dwo_file = dwo_file; | |
8657 | dwo_unit->signature = signature; | |
8658 | dwo_unit->info_or_types_section = | |
8659 | obstack_alloc (&objfile->objfile_obstack, | |
8660 | sizeof (struct dwarf2_section_info)); | |
8661 | *dwo_unit->info_or_types_section = sections.info_or_types; | |
8662 | /* offset, length, type_offset_in_tu are set later. */ | |
8663 | ||
8664 | return dwo_unit; | |
8665 | } | |
8666 | ||
8667 | /* Lookup the DWO with SIGNATURE in DWP_FILE. */ | |
8668 | ||
8669 | static struct dwo_unit * | |
8670 | lookup_dwo_in_dwp (struct dwp_file *dwp_file, | |
8671 | const struct dwp_hash_table *htab, | |
8672 | ULONGEST signature, int is_debug_types) | |
8673 | { | |
8674 | bfd *dbfd = dwp_file->dbfd; | |
8675 | uint32_t mask = htab->nr_slots - 1; | |
8676 | uint32_t hash = signature & mask; | |
8677 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
8678 | unsigned int i; | |
8679 | void **slot; | |
8680 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
8681 | ||
8682 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
8683 | find_dwo_cu.signature = signature; | |
8684 | slot = htab_find_slot (dwp_file->loaded_cutus, &find_dwo_cu, INSERT); | |
8685 | ||
8686 | if (*slot != NULL) | |
8687 | return *slot; | |
8688 | ||
8689 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
8690 | for (i = 0; i < htab->nr_slots; ++i) | |
8691 | { | |
8692 | ULONGEST signature_in_table; | |
8693 | ||
8694 | signature_in_table = | |
8695 | read_8_bytes (dbfd, htab->hash_table + hash * sizeof (uint64_t)); | |
8696 | if (signature_in_table == signature) | |
8697 | { | |
8698 | uint32_t section_index = | |
8699 | read_4_bytes (dbfd, htab->unit_table + hash * sizeof (uint32_t)); | |
8700 | ||
8701 | *slot = create_dwo_in_dwp (dwp_file, htab, section_index, | |
8702 | signature, is_debug_types); | |
8703 | return *slot; | |
8704 | } | |
8705 | if (signature_in_table == 0) | |
8706 | return NULL; | |
8707 | hash = (hash + hash2) & mask; | |
8708 | } | |
8709 | ||
8710 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
8711 | " [in module %s]"), | |
8712 | dwp_file->name); | |
8713 | } | |
8714 | ||
8715 | /* Subroutine of open_dwop_file to simplify it. | |
3019eac3 DE |
8716 | Open the file specified by FILE_NAME and hand it off to BFD for |
8717 | preliminary analysis. Return a newly initialized bfd *, which | |
8718 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 8719 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
3019eac3 DE |
8720 | In case of trouble, return NULL. |
8721 | NOTE: This function is derived from symfile_bfd_open. */ | |
8722 | ||
8723 | static bfd * | |
80626a55 | 8724 | try_open_dwop_file (const char *file_name, int is_dwp) |
3019eac3 DE |
8725 | { |
8726 | bfd *sym_bfd; | |
80626a55 | 8727 | int desc, flags; |
3019eac3 | 8728 | char *absolute_name; |
3019eac3 | 8729 | |
80626a55 DE |
8730 | flags = OPF_TRY_CWD_FIRST; |
8731 | if (is_dwp) | |
8732 | flags |= OPF_SEARCH_IN_PATH; | |
8733 | desc = openp (debug_file_directory, flags, file_name, | |
3019eac3 DE |
8734 | O_RDONLY | O_BINARY, &absolute_name); |
8735 | if (desc < 0) | |
8736 | return NULL; | |
8737 | ||
bb397797 | 8738 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
3019eac3 DE |
8739 | if (!sym_bfd) |
8740 | { | |
3019eac3 DE |
8741 | xfree (absolute_name); |
8742 | return NULL; | |
8743 | } | |
a4453b7e | 8744 | xfree (absolute_name); |
3019eac3 DE |
8745 | bfd_set_cacheable (sym_bfd, 1); |
8746 | ||
8747 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
8748 | { | |
cbb099e8 | 8749 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
8750 | return NULL; |
8751 | } | |
8752 | ||
3019eac3 DE |
8753 | return sym_bfd; |
8754 | } | |
8755 | ||
80626a55 | 8756 | /* Try to open DWO/DWP file FILE_NAME. |
3019eac3 | 8757 | COMP_DIR is the DW_AT_comp_dir attribute. |
80626a55 | 8758 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
3019eac3 DE |
8759 | The result is the bfd handle of the file. |
8760 | If there is a problem finding or opening the file, return NULL. | |
8761 | Upon success, the canonicalized path of the file is stored in the bfd, | |
8762 | same as symfile_bfd_open. */ | |
8763 | ||
8764 | static bfd * | |
80626a55 | 8765 | open_dwop_file (const char *file_name, const char *comp_dir, int is_dwp) |
3019eac3 DE |
8766 | { |
8767 | bfd *abfd; | |
3019eac3 | 8768 | |
80626a55 DE |
8769 | if (IS_ABSOLUTE_PATH (file_name)) |
8770 | return try_open_dwop_file (file_name, is_dwp); | |
3019eac3 DE |
8771 | |
8772 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
8773 | ||
8774 | if (comp_dir != NULL) | |
8775 | { | |
80626a55 | 8776 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
8777 | |
8778 | /* NOTE: If comp_dir is a relative path, this will also try the | |
8779 | search path, which seems useful. */ | |
80626a55 | 8780 | abfd = try_open_dwop_file (path_to_try, is_dwp); |
3019eac3 DE |
8781 | xfree (path_to_try); |
8782 | if (abfd != NULL) | |
8783 | return abfd; | |
8784 | } | |
8785 | ||
8786 | /* That didn't work, try debug-file-directory, which, despite its name, | |
8787 | is a list of paths. */ | |
8788 | ||
8789 | if (*debug_file_directory == '\0') | |
8790 | return NULL; | |
8791 | ||
80626a55 | 8792 | return try_open_dwop_file (file_name, is_dwp); |
3019eac3 DE |
8793 | } |
8794 | ||
80626a55 DE |
8795 | /* This function is mapped across the sections and remembers the offset and |
8796 | size of each of the DWO debugging sections we are interested in. */ | |
8797 | ||
8798 | static void | |
8799 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
8800 | { | |
8801 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
8802 | const struct dwop_section_names *names = &dwop_section_names; | |
8803 | ||
8804 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
8805 | { | |
8806 | dwo_sections->abbrev.asection = sectp; | |
8807 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); | |
8808 | } | |
8809 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
8810 | { | |
8811 | dwo_sections->info.asection = sectp; | |
8812 | dwo_sections->info.size = bfd_get_section_size (sectp); | |
8813 | } | |
8814 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
8815 | { | |
8816 | dwo_sections->line.asection = sectp; | |
8817 | dwo_sections->line.size = bfd_get_section_size (sectp); | |
8818 | } | |
8819 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
8820 | { | |
8821 | dwo_sections->loc.asection = sectp; | |
8822 | dwo_sections->loc.size = bfd_get_section_size (sectp); | |
8823 | } | |
8824 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
8825 | { | |
8826 | dwo_sections->macinfo.asection = sectp; | |
8827 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); | |
8828 | } | |
8829 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
8830 | { | |
8831 | dwo_sections->macro.asection = sectp; | |
8832 | dwo_sections->macro.size = bfd_get_section_size (sectp); | |
8833 | } | |
8834 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
8835 | { | |
8836 | dwo_sections->str.asection = sectp; | |
8837 | dwo_sections->str.size = bfd_get_section_size (sectp); | |
8838 | } | |
8839 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
8840 | { | |
8841 | dwo_sections->str_offsets.asection = sectp; | |
8842 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); | |
8843 | } | |
8844 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
8845 | { | |
8846 | struct dwarf2_section_info type_section; | |
8847 | ||
8848 | memset (&type_section, 0, sizeof (type_section)); | |
8849 | type_section.asection = sectp; | |
8850 | type_section.size = bfd_get_section_size (sectp); | |
8851 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
8852 | &type_section); | |
8853 | } | |
8854 | } | |
8855 | ||
8856 | /* Initialize the use of the DWO file specified by DWO_NAME. | |
8857 | The result is NULL if DWO_NAME can't be found. */ | |
3019eac3 DE |
8858 | |
8859 | static struct dwo_file * | |
80626a55 | 8860 | open_and_init_dwo_file (const char *dwo_name, const char *comp_dir) |
3019eac3 DE |
8861 | { |
8862 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
8863 | struct dwo_file *dwo_file; |
8864 | bfd *dbfd; | |
3019eac3 DE |
8865 | struct cleanup *cleanups; |
8866 | ||
80626a55 DE |
8867 | dbfd = open_dwop_file (dwo_name, comp_dir, 0); |
8868 | if (dbfd == NULL) | |
8869 | { | |
8870 | if (dwarf2_read_debug) | |
8871 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
8872 | return NULL; | |
8873 | } | |
8874 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
8875 | dwo_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
8876 | dwo_name, strlen (dwo_name)); | |
8877 | dwo_file->dbfd = dbfd; | |
3019eac3 DE |
8878 | |
8879 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
8880 | ||
80626a55 | 8881 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 8882 | |
80626a55 | 8883 | dwo_file->cus = create_dwo_debug_info_hash_table (dwo_file); |
3019eac3 DE |
8884 | |
8885 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
8886 | dwo_file->sections.types); | |
8887 | ||
8888 | discard_cleanups (cleanups); | |
8889 | ||
80626a55 DE |
8890 | if (dwarf2_read_debug) |
8891 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
8892 | ||
3019eac3 DE |
8893 | return dwo_file; |
8894 | } | |
8895 | ||
80626a55 DE |
8896 | /* This function is mapped across the sections and remembers the offset and |
8897 | size of each of the DWP debugging sections we are interested in. */ | |
3019eac3 | 8898 | |
80626a55 DE |
8899 | static void |
8900 | dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
3019eac3 | 8901 | { |
80626a55 DE |
8902 | struct dwp_file *dwp_file = dwp_file_ptr; |
8903 | const struct dwop_section_names *names = &dwop_section_names; | |
8904 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 8905 | |
80626a55 DE |
8906 | /* Record the ELF section number for later lookup: this is what the |
8907 | .debug_cu_index,.debug_tu_index tables use. */ | |
8908 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
8909 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 8910 | |
80626a55 DE |
8911 | /* Look for specific sections that we need. */ |
8912 | if (section_is_p (sectp->name, &names->str_dwo)) | |
8913 | { | |
8914 | dwp_file->sections.str.asection = sectp; | |
8915 | dwp_file->sections.str.size = bfd_get_section_size (sectp); | |
8916 | } | |
8917 | else if (section_is_p (sectp->name, &names->cu_index)) | |
8918 | { | |
8919 | dwp_file->sections.cu_index.asection = sectp; | |
8920 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); | |
8921 | } | |
8922 | else if (section_is_p (sectp->name, &names->tu_index)) | |
8923 | { | |
8924 | dwp_file->sections.tu_index.asection = sectp; | |
8925 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); | |
8926 | } | |
8927 | } | |
3019eac3 | 8928 | |
80626a55 | 8929 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 8930 | |
80626a55 DE |
8931 | static hashval_t |
8932 | hash_dwp_loaded_cutus (const void *item) | |
8933 | { | |
8934 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 8935 | |
80626a55 DE |
8936 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
8937 | return dwo_unit->signature; | |
3019eac3 DE |
8938 | } |
8939 | ||
80626a55 | 8940 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 8941 | |
80626a55 DE |
8942 | static int |
8943 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 8944 | { |
80626a55 DE |
8945 | const struct dwo_unit *dua = a; |
8946 | const struct dwo_unit *dub = b; | |
3019eac3 | 8947 | |
80626a55 DE |
8948 | return dua->signature == dub->signature; |
8949 | } | |
3019eac3 | 8950 | |
80626a55 | 8951 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 8952 | |
80626a55 DE |
8953 | static htab_t |
8954 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
8955 | { | |
8956 | return htab_create_alloc_ex (3, | |
8957 | hash_dwp_loaded_cutus, | |
8958 | eq_dwp_loaded_cutus, | |
8959 | NULL, | |
8960 | &objfile->objfile_obstack, | |
8961 | hashtab_obstack_allocate, | |
8962 | dummy_obstack_deallocate); | |
8963 | } | |
3019eac3 | 8964 | |
80626a55 DE |
8965 | /* Initialize the use of the DWP file for the current objfile. |
8966 | By convention the name of the DWP file is ${objfile}.dwp. | |
8967 | The result is NULL if it can't be found. */ | |
a766d390 | 8968 | |
80626a55 DE |
8969 | static struct dwp_file * |
8970 | open_and_init_dwp_file (const char *comp_dir) | |
8971 | { | |
8972 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8973 | struct dwp_file *dwp_file; | |
8974 | char *dwp_name; | |
8975 | bfd *dbfd; | |
8976 | struct cleanup *cleanups; | |
8977 | ||
2792b94d | 8978 | dwp_name = xstrprintf ("%s.dwp", dwarf2_per_objfile->objfile->name); |
80626a55 DE |
8979 | cleanups = make_cleanup (xfree, dwp_name); |
8980 | ||
8981 | dbfd = open_dwop_file (dwp_name, comp_dir, 1); | |
8982 | if (dbfd == NULL) | |
8983 | { | |
8984 | if (dwarf2_read_debug) | |
8985 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
8986 | do_cleanups (cleanups); | |
8987 | return NULL; | |
3019eac3 | 8988 | } |
80626a55 DE |
8989 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
8990 | dwp_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
8991 | dwp_name, strlen (dwp_name)); | |
8992 | dwp_file->dbfd = dbfd; | |
8993 | do_cleanups (cleanups); | |
c906108c | 8994 | |
80626a55 | 8995 | cleanups = make_cleanup (free_dwo_file_cleanup, dwp_file); |
df8a16a1 | 8996 | |
80626a55 DE |
8997 | /* +1: section 0 is unused */ |
8998 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
8999 | dwp_file->elf_sections = | |
9000 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
9001 | dwp_file->num_sections, asection *); | |
9002 | ||
9003 | bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file); | |
9004 | ||
9005 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
9006 | ||
9007 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
9008 | ||
9009 | dwp_file->loaded_cutus = allocate_dwp_loaded_cutus_table (objfile); | |
9010 | ||
9011 | discard_cleanups (cleanups); | |
9012 | ||
9013 | if (dwarf2_read_debug) | |
9014 | { | |
9015 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
9016 | fprintf_unfiltered (gdb_stdlog, | |
9017 | " %u CUs, %u TUs\n", | |
9018 | dwp_file->cus ? dwp_file->cus->nr_units : 0, | |
9019 | dwp_file->tus ? dwp_file->tus->nr_units : 0); | |
9020 | } | |
9021 | ||
9022 | return dwp_file; | |
3019eac3 | 9023 | } |
c906108c | 9024 | |
80626a55 DE |
9025 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
9026 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
9027 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 9028 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
9029 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
9030 | ||
9031 | This is called, for example, when wanting to read a variable with a | |
9032 | complex location. Therefore we don't want to do file i/o for every call. | |
9033 | Therefore we don't want to look for a DWO file on every call. | |
9034 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
9035 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
9036 | for a DWO file. | |
9037 | ||
1c658ad5 | 9038 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 9039 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 9040 | |
3019eac3 | 9041 | static struct dwo_unit * |
80626a55 DE |
9042 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
9043 | const char *dwo_name, const char *comp_dir, | |
9044 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
9045 | { |
9046 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9047 | const char *kind = is_debug_types ? "TU" : "CU"; |
9048 | void **dwo_file_slot; | |
3019eac3 | 9049 | struct dwo_file *dwo_file; |
80626a55 | 9050 | struct dwp_file *dwp_file; |
cb1df416 | 9051 | |
80626a55 | 9052 | /* Have we already read SIGNATURE from a DWP file? */ |
cf2c3c16 | 9053 | |
80626a55 DE |
9054 | if (! dwarf2_per_objfile->dwp_checked) |
9055 | { | |
9056 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (comp_dir); | |
9057 | dwarf2_per_objfile->dwp_checked = 1; | |
9058 | } | |
9059 | dwp_file = dwarf2_per_objfile->dwp_file; | |
3019eac3 | 9060 | |
80626a55 | 9061 | if (dwp_file != NULL) |
cf2c3c16 | 9062 | { |
80626a55 DE |
9063 | const struct dwp_hash_table *dwp_htab = |
9064 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
9065 | ||
9066 | if (dwp_htab != NULL) | |
9067 | { | |
9068 | struct dwo_unit *dwo_cutu = | |
9069 | lookup_dwo_in_dwp (dwp_file, dwp_htab, signature, is_debug_types); | |
9070 | ||
9071 | if (dwo_cutu != NULL) | |
9072 | { | |
9073 | if (dwarf2_read_debug) | |
9074 | { | |
9075 | fprintf_unfiltered (gdb_stdlog, | |
9076 | "Virtual DWO %s %s found: @%s\n", | |
9077 | kind, hex_string (signature), | |
9078 | host_address_to_string (dwo_cutu)); | |
9079 | } | |
9080 | return dwo_cutu; | |
9081 | } | |
9082 | } | |
9083 | } | |
9084 | ||
9085 | /* Have we already seen DWO_NAME? */ | |
9086 | ||
9087 | dwo_file_slot = lookup_dwo_file_slot (dwo_name); | |
9088 | if (*dwo_file_slot == NULL) | |
9089 | { | |
9090 | /* Read in the file and build a table of the DWOs it contains. */ | |
9091 | *dwo_file_slot = open_and_init_dwo_file (dwo_name, comp_dir); | |
9092 | } | |
9093 | /* NOTE: This will be NULL if unable to open the file. */ | |
9094 | dwo_file = *dwo_file_slot; | |
9095 | ||
9096 | if (dwo_file != NULL) | |
9097 | { | |
9098 | htab_t htab = is_debug_types ? dwo_file->tus : dwo_file->cus; | |
9099 | ||
9100 | if (htab != NULL) | |
9101 | { | |
9102 | struct dwo_unit find_dwo_cutu, *dwo_cutu; | |
9a619af0 | 9103 | |
80626a55 DE |
9104 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); |
9105 | find_dwo_cutu.signature = signature; | |
9106 | dwo_cutu = htab_find (htab, &find_dwo_cutu); | |
3019eac3 | 9107 | |
80626a55 DE |
9108 | if (dwo_cutu != NULL) |
9109 | { | |
9110 | if (dwarf2_read_debug) | |
9111 | { | |
9112 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
9113 | kind, dwo_name, hex_string (signature), | |
9114 | host_address_to_string (dwo_cutu)); | |
9115 | } | |
9116 | return dwo_cutu; | |
9117 | } | |
9118 | } | |
2e276125 | 9119 | } |
9cdd5dbd | 9120 | |
80626a55 DE |
9121 | /* We didn't find it. This could mean a dwo_id mismatch, or |
9122 | someone deleted the DWO/DWP file, or the search path isn't set up | |
9123 | correctly to find the file. */ | |
9124 | ||
9125 | if (dwarf2_read_debug) | |
9126 | { | |
9127 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
9128 | kind, dwo_name, hex_string (signature)); | |
9129 | } | |
3019eac3 DE |
9130 | |
9131 | complaint (&symfile_complaints, | |
80626a55 | 9132 | _("Could not find DWO CU referenced by CU at offset 0x%x" |
3019eac3 | 9133 | " [in module %s]"), |
80626a55 | 9134 | this_unit->offset.sect_off, objfile->name); |
3019eac3 | 9135 | return NULL; |
5fb290d7 DJ |
9136 | } |
9137 | ||
80626a55 DE |
9138 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
9139 | See lookup_dwo_cutu_unit for details. */ | |
9140 | ||
9141 | static struct dwo_unit * | |
9142 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
9143 | const char *dwo_name, const char *comp_dir, | |
9144 | ULONGEST signature) | |
9145 | { | |
9146 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
9147 | } | |
9148 | ||
9149 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
9150 | See lookup_dwo_cutu_unit for details. */ | |
9151 | ||
9152 | static struct dwo_unit * | |
9153 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
9154 | const char *dwo_name, const char *comp_dir) | |
9155 | { | |
9156 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
9157 | } | |
9158 | ||
3019eac3 DE |
9159 | /* Free all resources associated with DWO_FILE. |
9160 | Close the DWO file and munmap the sections. | |
9161 | All memory should be on the objfile obstack. */ | |
348e048f DE |
9162 | |
9163 | static void | |
3019eac3 | 9164 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 9165 | { |
3019eac3 DE |
9166 | int ix; |
9167 | struct dwarf2_section_info *section; | |
348e048f | 9168 | |
80626a55 DE |
9169 | gdb_assert (dwo_file->dbfd != objfile->obfd); |
9170 | gdb_bfd_unref (dwo_file->dbfd); | |
348e048f | 9171 | |
3019eac3 DE |
9172 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
9173 | } | |
348e048f | 9174 | |
3019eac3 | 9175 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 9176 | |
3019eac3 DE |
9177 | static void |
9178 | free_dwo_file_cleanup (void *arg) | |
9179 | { | |
9180 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
9181 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 9182 | |
3019eac3 DE |
9183 | free_dwo_file (dwo_file, objfile); |
9184 | } | |
348e048f | 9185 | |
3019eac3 | 9186 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 9187 | |
3019eac3 DE |
9188 | static int |
9189 | free_dwo_file_from_slot (void **slot, void *info) | |
9190 | { | |
9191 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
9192 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 9193 | |
3019eac3 | 9194 | free_dwo_file (dwo_file, objfile); |
348e048f | 9195 | |
3019eac3 DE |
9196 | return 1; |
9197 | } | |
348e048f | 9198 | |
3019eac3 | 9199 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 9200 | |
3019eac3 DE |
9201 | static void |
9202 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
9203 | { | |
9204 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 9205 | } |
3019eac3 DE |
9206 | \f |
9207 | /* Read in various DIEs. */ | |
348e048f | 9208 | |
d389af10 JK |
9209 | /* qsort helper for inherit_abstract_dies. */ |
9210 | ||
9211 | static int | |
9212 | unsigned_int_compar (const void *ap, const void *bp) | |
9213 | { | |
9214 | unsigned int a = *(unsigned int *) ap; | |
9215 | unsigned int b = *(unsigned int *) bp; | |
9216 | ||
9217 | return (a > b) - (b > a); | |
9218 | } | |
9219 | ||
9220 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
9221 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
9222 | already referenced by DW_AT_abstract_origin from the children of the | |
9223 | current DIE. */ | |
d389af10 JK |
9224 | |
9225 | static void | |
9226 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
9227 | { | |
9228 | struct die_info *child_die; | |
9229 | unsigned die_children_count; | |
9230 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
9231 | sect_offset *offsets; |
9232 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
9233 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
9234 | struct die_info *origin_die; | |
9235 | /* Iterator of the ORIGIN_DIE children. */ | |
9236 | struct die_info *origin_child_die; | |
9237 | struct cleanup *cleanups; | |
9238 | struct attribute *attr; | |
cd02d79d PA |
9239 | struct dwarf2_cu *origin_cu; |
9240 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
9241 | |
9242 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9243 | if (!attr) | |
9244 | return; | |
9245 | ||
cd02d79d PA |
9246 | /* Note that following die references may follow to a die in a |
9247 | different cu. */ | |
9248 | ||
9249 | origin_cu = cu; | |
9250 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
9251 | ||
9252 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
9253 | symbols in. */ | |
9254 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
9255 | origin_cu->list_in_scope = cu->list_in_scope; | |
9256 | ||
edb3359d DJ |
9257 | if (die->tag != origin_die->tag |
9258 | && !(die->tag == DW_TAG_inlined_subroutine | |
9259 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9260 | complaint (&symfile_complaints, |
9261 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 9262 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
9263 | |
9264 | child_die = die->child; | |
9265 | die_children_count = 0; | |
9266 | while (child_die && child_die->tag) | |
9267 | { | |
9268 | child_die = sibling_die (child_die); | |
9269 | die_children_count++; | |
9270 | } | |
9271 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
9272 | cleanups = make_cleanup (xfree, offsets); | |
9273 | ||
9274 | offsets_end = offsets; | |
9275 | child_die = die->child; | |
9276 | while (child_die && child_die->tag) | |
9277 | { | |
c38f313d DJ |
9278 | /* For each CHILD_DIE, find the corresponding child of |
9279 | ORIGIN_DIE. If there is more than one layer of | |
9280 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
9281 | but GCC versions at least through 4.4 generate this (GCC PR | |
9282 | 40573). */ | |
9283 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 9284 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 9285 | |
c38f313d DJ |
9286 | while (1) |
9287 | { | |
cd02d79d PA |
9288 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
9289 | child_origin_cu); | |
c38f313d DJ |
9290 | if (attr == NULL) |
9291 | break; | |
cd02d79d PA |
9292 | child_origin_die = follow_die_ref (child_origin_die, attr, |
9293 | &child_origin_cu); | |
c38f313d DJ |
9294 | } |
9295 | ||
d389af10 JK |
9296 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
9297 | counterpart may exist. */ | |
c38f313d | 9298 | if (child_origin_die != child_die) |
d389af10 | 9299 | { |
edb3359d DJ |
9300 | if (child_die->tag != child_origin_die->tag |
9301 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
9302 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9303 | complaint (&symfile_complaints, |
9304 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9305 | "different tags"), child_die->offset.sect_off, |
9306 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9307 | if (child_origin_die->parent != origin_die) |
9308 | complaint (&symfile_complaints, | |
9309 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9310 | "different parents"), child_die->offset.sect_off, |
9311 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9312 | else |
9313 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
9314 | } |
9315 | child_die = sibling_die (child_die); | |
9316 | } | |
9317 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
9318 | unsigned_int_compar); | |
9319 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 9320 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
9321 | complaint (&symfile_complaints, |
9322 | _("Multiple children of DIE 0x%x refer " | |
9323 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 9324 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
9325 | |
9326 | offsetp = offsets; | |
9327 | origin_child_die = origin_die->child; | |
9328 | while (origin_child_die && origin_child_die->tag) | |
9329 | { | |
9330 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
9331 | while (offsetp < offsets_end |
9332 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 9333 | offsetp++; |
b64f50a1 JK |
9334 | if (offsetp >= offsets_end |
9335 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 JK |
9336 | { |
9337 | /* Found that ORIGIN_CHILD_DIE is really not referenced. */ | |
cd02d79d | 9338 | process_die (origin_child_die, origin_cu); |
d389af10 JK |
9339 | } |
9340 | origin_child_die = sibling_die (origin_child_die); | |
9341 | } | |
cd02d79d | 9342 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
9343 | |
9344 | do_cleanups (cleanups); | |
9345 | } | |
9346 | ||
c906108c | 9347 | static void |
e7c27a73 | 9348 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9349 | { |
e7c27a73 | 9350 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9351 | struct context_stack *new; |
c906108c SS |
9352 | CORE_ADDR lowpc; |
9353 | CORE_ADDR highpc; | |
9354 | struct die_info *child_die; | |
edb3359d | 9355 | struct attribute *attr, *call_line, *call_file; |
c906108c | 9356 | char *name; |
e142c38c | 9357 | CORE_ADDR baseaddr; |
801e3a5b | 9358 | struct block *block; |
edb3359d | 9359 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
9360 | VEC (symbolp) *template_args = NULL; |
9361 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
9362 | |
9363 | if (inlined_func) | |
9364 | { | |
9365 | /* If we do not have call site information, we can't show the | |
9366 | caller of this inlined function. That's too confusing, so | |
9367 | only use the scope for local variables. */ | |
9368 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
9369 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
9370 | if (call_line == NULL || call_file == NULL) | |
9371 | { | |
9372 | read_lexical_block_scope (die, cu); | |
9373 | return; | |
9374 | } | |
9375 | } | |
c906108c | 9376 | |
e142c38c DJ |
9377 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
9378 | ||
94af9270 | 9379 | name = dwarf2_name (die, cu); |
c906108c | 9380 | |
e8d05480 JB |
9381 | /* Ignore functions with missing or empty names. These are actually |
9382 | illegal according to the DWARF standard. */ | |
9383 | if (name == NULL) | |
9384 | { | |
9385 | complaint (&symfile_complaints, | |
b64f50a1 JK |
9386 | _("missing name for subprogram DIE at %d"), |
9387 | die->offset.sect_off); | |
e8d05480 JB |
9388 | return; |
9389 | } | |
9390 | ||
9391 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
9392 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
9393 | { | |
ae4d0c03 PM |
9394 | attr = dwarf2_attr (die, DW_AT_external, cu); |
9395 | if (!attr || !DW_UNSND (attr)) | |
9396 | complaint (&symfile_complaints, | |
3e43a32a MS |
9397 | _("cannot get low and high bounds " |
9398 | "for subprogram DIE at %d"), | |
b64f50a1 | 9399 | die->offset.sect_off); |
e8d05480 JB |
9400 | return; |
9401 | } | |
c906108c SS |
9402 | |
9403 | lowpc += baseaddr; | |
9404 | highpc += baseaddr; | |
9405 | ||
34eaf542 TT |
9406 | /* If we have any template arguments, then we must allocate a |
9407 | different sort of symbol. */ | |
9408 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
9409 | { | |
9410 | if (child_die->tag == DW_TAG_template_type_param | |
9411 | || child_die->tag == DW_TAG_template_value_param) | |
9412 | { | |
9413 | templ_func = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
9414 | struct template_symbol); | |
9415 | templ_func->base.is_cplus_template_function = 1; | |
9416 | break; | |
9417 | } | |
9418 | } | |
9419 | ||
c906108c | 9420 | new = push_context (0, lowpc); |
34eaf542 TT |
9421 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
9422 | (struct symbol *) templ_func); | |
4c2df51b | 9423 | |
4cecd739 DJ |
9424 | /* If there is a location expression for DW_AT_frame_base, record |
9425 | it. */ | |
e142c38c | 9426 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 9427 | if (attr) |
c034e007 AC |
9428 | /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location |
9429 | expression is being recorded directly in the function's symbol | |
9430 | and not in a separate frame-base object. I guess this hack is | |
9431 | to avoid adding some sort of frame-base adjunct/annex to the | |
9432 | function's symbol :-(. The problem with doing this is that it | |
9433 | results in a function symbol with a location expression that | |
9434 | has nothing to do with the location of the function, ouch! The | |
9435 | relationship should be: a function's symbol has-a frame base; a | |
9436 | frame-base has-a location expression. */ | |
e7c27a73 | 9437 | dwarf2_symbol_mark_computed (attr, new->name, cu); |
4c2df51b | 9438 | |
e142c38c | 9439 | cu->list_in_scope = &local_symbols; |
c906108c | 9440 | |
639d11d3 | 9441 | if (die->child != NULL) |
c906108c | 9442 | { |
639d11d3 | 9443 | child_die = die->child; |
c906108c SS |
9444 | while (child_die && child_die->tag) |
9445 | { | |
34eaf542 TT |
9446 | if (child_die->tag == DW_TAG_template_type_param |
9447 | || child_die->tag == DW_TAG_template_value_param) | |
9448 | { | |
9449 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
9450 | ||
f1078f66 DJ |
9451 | if (arg != NULL) |
9452 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
9453 | } |
9454 | else | |
9455 | process_die (child_die, cu); | |
c906108c SS |
9456 | child_die = sibling_die (child_die); |
9457 | } | |
9458 | } | |
9459 | ||
d389af10 JK |
9460 | inherit_abstract_dies (die, cu); |
9461 | ||
4a811a97 UW |
9462 | /* If we have a DW_AT_specification, we might need to import using |
9463 | directives from the context of the specification DIE. See the | |
9464 | comment in determine_prefix. */ | |
9465 | if (cu->language == language_cplus | |
9466 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
9467 | { | |
9468 | struct dwarf2_cu *spec_cu = cu; | |
9469 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
9470 | ||
9471 | while (spec_die) | |
9472 | { | |
9473 | child_die = spec_die->child; | |
9474 | while (child_die && child_die->tag) | |
9475 | { | |
9476 | if (child_die->tag == DW_TAG_imported_module) | |
9477 | process_die (child_die, spec_cu); | |
9478 | child_die = sibling_die (child_die); | |
9479 | } | |
9480 | ||
9481 | /* In some cases, GCC generates specification DIEs that | |
9482 | themselves contain DW_AT_specification attributes. */ | |
9483 | spec_die = die_specification (spec_die, &spec_cu); | |
9484 | } | |
9485 | } | |
9486 | ||
c906108c SS |
9487 | new = pop_context (); |
9488 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
9489 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
9490 | lowpc, highpc, objfile); | |
9491 | ||
df8a16a1 | 9492 | /* For C++, set the block's scope. */ |
f55ee35c | 9493 | if (cu->language == language_cplus || cu->language == language_fortran) |
df8a16a1 | 9494 | cp_set_block_scope (new->name, block, &objfile->objfile_obstack, |
0114d602 | 9495 | determine_prefix (die, cu), |
df8a16a1 DJ |
9496 | processing_has_namespace_info); |
9497 | ||
801e3a5b JB |
9498 | /* If we have address ranges, record them. */ |
9499 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 9500 | |
34eaf542 TT |
9501 | /* Attach template arguments to function. */ |
9502 | if (! VEC_empty (symbolp, template_args)) | |
9503 | { | |
9504 | gdb_assert (templ_func != NULL); | |
9505 | ||
9506 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
9507 | templ_func->template_arguments | |
9508 | = obstack_alloc (&objfile->objfile_obstack, | |
9509 | (templ_func->n_template_arguments | |
9510 | * sizeof (struct symbol *))); | |
9511 | memcpy (templ_func->template_arguments, | |
9512 | VEC_address (symbolp, template_args), | |
9513 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
9514 | VEC_free (symbolp, template_args); | |
9515 | } | |
9516 | ||
208d8187 JB |
9517 | /* In C++, we can have functions nested inside functions (e.g., when |
9518 | a function declares a class that has methods). This means that | |
9519 | when we finish processing a function scope, we may need to go | |
9520 | back to building a containing block's symbol lists. */ | |
9521 | local_symbols = new->locals; | |
27aa8d6a | 9522 | using_directives = new->using_directives; |
208d8187 | 9523 | |
921e78cf JB |
9524 | /* If we've finished processing a top-level function, subsequent |
9525 | symbols go in the file symbol list. */ | |
9526 | if (outermost_context_p ()) | |
e142c38c | 9527 | cu->list_in_scope = &file_symbols; |
c906108c SS |
9528 | } |
9529 | ||
9530 | /* Process all the DIES contained within a lexical block scope. Start | |
9531 | a new scope, process the dies, and then close the scope. */ | |
9532 | ||
9533 | static void | |
e7c27a73 | 9534 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9535 | { |
e7c27a73 | 9536 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9537 | struct context_stack *new; |
c906108c SS |
9538 | CORE_ADDR lowpc, highpc; |
9539 | struct die_info *child_die; | |
e142c38c DJ |
9540 | CORE_ADDR baseaddr; |
9541 | ||
9542 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
9543 | |
9544 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
9545 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
9546 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 9547 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 9548 | describe ranges. */ |
d85a05f0 | 9549 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
9550 | return; |
9551 | lowpc += baseaddr; | |
9552 | highpc += baseaddr; | |
9553 | ||
9554 | push_context (0, lowpc); | |
639d11d3 | 9555 | if (die->child != NULL) |
c906108c | 9556 | { |
639d11d3 | 9557 | child_die = die->child; |
c906108c SS |
9558 | while (child_die && child_die->tag) |
9559 | { | |
e7c27a73 | 9560 | process_die (child_die, cu); |
c906108c SS |
9561 | child_die = sibling_die (child_die); |
9562 | } | |
9563 | } | |
9564 | new = pop_context (); | |
9565 | ||
8540c487 | 9566 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 9567 | { |
801e3a5b JB |
9568 | struct block *block |
9569 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
9570 | highpc, objfile); | |
9571 | ||
9572 | /* Note that recording ranges after traversing children, as we | |
9573 | do here, means that recording a parent's ranges entails | |
9574 | walking across all its children's ranges as they appear in | |
9575 | the address map, which is quadratic behavior. | |
9576 | ||
9577 | It would be nicer to record the parent's ranges before | |
9578 | traversing its children, simply overriding whatever you find | |
9579 | there. But since we don't even decide whether to create a | |
9580 | block until after we've traversed its children, that's hard | |
9581 | to do. */ | |
9582 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
9583 | } |
9584 | local_symbols = new->locals; | |
27aa8d6a | 9585 | using_directives = new->using_directives; |
c906108c SS |
9586 | } |
9587 | ||
96408a79 SA |
9588 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
9589 | ||
9590 | static void | |
9591 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9592 | { | |
9593 | struct objfile *objfile = cu->objfile; | |
9594 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
9595 | CORE_ADDR pc, baseaddr; | |
9596 | struct attribute *attr; | |
9597 | struct call_site *call_site, call_site_local; | |
9598 | void **slot; | |
9599 | int nparams; | |
9600 | struct die_info *child_die; | |
9601 | ||
9602 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
9603 | ||
9604 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
9605 | if (!attr) | |
9606 | { | |
9607 | complaint (&symfile_complaints, | |
9608 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
9609 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9610 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9611 | return; |
9612 | } | |
9613 | pc = DW_ADDR (attr) + baseaddr; | |
9614 | ||
9615 | if (cu->call_site_htab == NULL) | |
9616 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
9617 | NULL, &objfile->objfile_obstack, | |
9618 | hashtab_obstack_allocate, NULL); | |
9619 | call_site_local.pc = pc; | |
9620 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
9621 | if (*slot != NULL) | |
9622 | { | |
9623 | complaint (&symfile_complaints, | |
9624 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
9625 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9626 | paddress (gdbarch, pc), die->offset.sect_off, objfile->name); |
96408a79 SA |
9627 | return; |
9628 | } | |
9629 | ||
9630 | /* Count parameters at the caller. */ | |
9631 | ||
9632 | nparams = 0; | |
9633 | for (child_die = die->child; child_die && child_die->tag; | |
9634 | child_die = sibling_die (child_die)) | |
9635 | { | |
9636 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
9637 | { | |
9638 | complaint (&symfile_complaints, | |
9639 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
9640 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9641 | child_die->tag, child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9642 | continue; |
9643 | } | |
9644 | ||
9645 | nparams++; | |
9646 | } | |
9647 | ||
9648 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
9649 | (sizeof (*call_site) | |
9650 | + (sizeof (*call_site->parameter) | |
9651 | * (nparams - 1)))); | |
9652 | *slot = call_site; | |
9653 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
9654 | call_site->pc = pc; | |
9655 | ||
9656 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
9657 | { | |
9658 | struct die_info *func_die; | |
9659 | ||
9660 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
9661 | for (func_die = die->parent; | |
9662 | func_die && func_die->tag != DW_TAG_subprogram | |
9663 | && func_die->tag != DW_TAG_subroutine_type; | |
9664 | func_die = func_die->parent); | |
9665 | ||
9666 | /* DW_AT_GNU_all_call_sites is a superset | |
9667 | of DW_AT_GNU_all_tail_call_sites. */ | |
9668 | if (func_die | |
9669 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
9670 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
9671 | { | |
9672 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
9673 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
9674 | both the initial caller containing the real return address PC and | |
9675 | the final callee containing the current PC of a chain of tail | |
9676 | calls do not need to have the tail call list complete. But any | |
9677 | function candidate for a virtual tail call frame searched via | |
9678 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
9679 | determined unambiguously. */ | |
9680 | } | |
9681 | else | |
9682 | { | |
9683 | struct type *func_type = NULL; | |
9684 | ||
9685 | if (func_die) | |
9686 | func_type = get_die_type (func_die, cu); | |
9687 | if (func_type != NULL) | |
9688 | { | |
9689 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
9690 | ||
9691 | /* Enlist this call site to the function. */ | |
9692 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
9693 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
9694 | } | |
9695 | else | |
9696 | complaint (&symfile_complaints, | |
9697 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
9698 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9699 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9700 | } |
9701 | } | |
9702 | ||
9703 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
9704 | if (attr == NULL) | |
9705 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9706 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
9707 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
9708 | /* Keep NULL DWARF_BLOCK. */; | |
9709 | else if (attr_form_is_block (attr)) | |
9710 | { | |
9711 | struct dwarf2_locexpr_baton *dlbaton; | |
9712 | ||
9713 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
9714 | dlbaton->data = DW_BLOCK (attr)->data; | |
9715 | dlbaton->size = DW_BLOCK (attr)->size; | |
9716 | dlbaton->per_cu = cu->per_cu; | |
9717 | ||
9718 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
9719 | } | |
9720 | else if (is_ref_attr (attr)) | |
9721 | { | |
96408a79 SA |
9722 | struct dwarf2_cu *target_cu = cu; |
9723 | struct die_info *target_die; | |
9724 | ||
9725 | target_die = follow_die_ref_or_sig (die, attr, &target_cu); | |
9726 | gdb_assert (target_cu->objfile == objfile); | |
9727 | if (die_is_declaration (target_die, target_cu)) | |
9728 | { | |
9729 | const char *target_physname; | |
9730 | ||
9731 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
9732 | if (target_physname == NULL) | |
9733 | complaint (&symfile_complaints, | |
9734 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
9735 | "physname, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 9736 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9737 | else |
9738 | SET_FIELD_PHYSNAME (call_site->target, (char *) target_physname); | |
9739 | } | |
9740 | else | |
9741 | { | |
9742 | CORE_ADDR lowpc; | |
9743 | ||
9744 | /* DW_AT_entry_pc should be preferred. */ | |
9745 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
9746 | complaint (&symfile_complaints, | |
9747 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
9748 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 9749 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9750 | else |
9751 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
9752 | } | |
9753 | } | |
9754 | else | |
9755 | complaint (&symfile_complaints, | |
9756 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
9757 | "block nor reference, for DIE 0x%x [in module %s]"), | |
b64f50a1 | 9758 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9759 | |
9760 | call_site->per_cu = cu->per_cu; | |
9761 | ||
9762 | for (child_die = die->child; | |
9763 | child_die && child_die->tag; | |
9764 | child_die = sibling_die (child_die)) | |
9765 | { | |
96408a79 | 9766 | struct call_site_parameter *parameter; |
1788b2d3 | 9767 | struct attribute *loc, *origin; |
96408a79 SA |
9768 | |
9769 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
9770 | { | |
9771 | /* Already printed the complaint above. */ | |
9772 | continue; | |
9773 | } | |
9774 | ||
9775 | gdb_assert (call_site->parameter_count < nparams); | |
9776 | parameter = &call_site->parameter[call_site->parameter_count]; | |
9777 | ||
1788b2d3 JK |
9778 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
9779 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
9780 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 9781 | |
24c5c679 | 9782 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 JK |
9783 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
9784 | if (loc == NULL && origin != NULL && is_ref_attr (origin)) | |
9785 | { | |
9786 | sect_offset offset; | |
9787 | ||
9788 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
9789 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
9790 | if (!offset_in_cu_p (&cu->header, offset)) |
9791 | { | |
9792 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
9793 | binding can be done only inside one CU. Such referenced DIE | |
9794 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
9795 | complaint (&symfile_complaints, | |
9796 | _("DW_AT_abstract_origin offset is not in CU for " | |
9797 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
9798 | "[in module %s]"), | |
9799 | child_die->offset.sect_off, objfile->name); | |
9800 | continue; | |
9801 | } | |
1788b2d3 JK |
9802 | parameter->u.param_offset.cu_off = (offset.sect_off |
9803 | - cu->header.offset.sect_off); | |
9804 | } | |
9805 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
9806 | { |
9807 | complaint (&symfile_complaints, | |
9808 | _("No DW_FORM_block* DW_AT_location for " | |
9809 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9810 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9811 | continue; |
9812 | } | |
24c5c679 | 9813 | else |
96408a79 | 9814 | { |
24c5c679 JK |
9815 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
9816 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
9817 | if (parameter->u.dwarf_reg != -1) | |
9818 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
9819 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
9820 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
9821 | ¶meter->u.fb_offset)) | |
9822 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
9823 | else | |
9824 | { | |
9825 | complaint (&symfile_complaints, | |
9826 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
9827 | "for DW_FORM_block* DW_AT_location is supported for " | |
9828 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
9829 | "[in module %s]"), | |
9830 | child_die->offset.sect_off, objfile->name); | |
9831 | continue; | |
9832 | } | |
96408a79 SA |
9833 | } |
9834 | ||
9835 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
9836 | if (!attr_form_is_block (attr)) | |
9837 | { | |
9838 | complaint (&symfile_complaints, | |
9839 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
9840 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9841 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9842 | continue; |
9843 | } | |
9844 | parameter->value = DW_BLOCK (attr)->data; | |
9845 | parameter->value_size = DW_BLOCK (attr)->size; | |
9846 | ||
9847 | /* Parameters are not pre-cleared by memset above. */ | |
9848 | parameter->data_value = NULL; | |
9849 | parameter->data_value_size = 0; | |
9850 | call_site->parameter_count++; | |
9851 | ||
9852 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
9853 | if (attr) | |
9854 | { | |
9855 | if (!attr_form_is_block (attr)) | |
9856 | complaint (&symfile_complaints, | |
9857 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
9858 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9859 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9860 | else |
9861 | { | |
9862 | parameter->data_value = DW_BLOCK (attr)->data; | |
9863 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
9864 | } | |
9865 | } | |
9866 | } | |
9867 | } | |
9868 | ||
43039443 | 9869 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
9870 | Return 1 if the attributes are present and valid, otherwise, return 0. |
9871 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
9872 | |
9873 | static int | |
9874 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
9875 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
9876 | struct partial_symtab *ranges_pst) | |
43039443 JK |
9877 | { |
9878 | struct objfile *objfile = cu->objfile; | |
9879 | struct comp_unit_head *cu_header = &cu->header; | |
9880 | bfd *obfd = objfile->obfd; | |
9881 | unsigned int addr_size = cu_header->addr_size; | |
9882 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
9883 | /* Base address selection entry. */ | |
9884 | CORE_ADDR base; | |
9885 | int found_base; | |
9886 | unsigned int dummy; | |
9887 | gdb_byte *buffer; | |
9888 | CORE_ADDR marker; | |
9889 | int low_set; | |
9890 | CORE_ADDR low = 0; | |
9891 | CORE_ADDR high = 0; | |
ff013f42 | 9892 | CORE_ADDR baseaddr; |
43039443 | 9893 | |
d00adf39 DE |
9894 | found_base = cu->base_known; |
9895 | base = cu->base_address; | |
43039443 | 9896 | |
be391dca | 9897 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 9898 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
9899 | { |
9900 | complaint (&symfile_complaints, | |
9901 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
9902 | offset); | |
9903 | return 0; | |
9904 | } | |
dce234bc | 9905 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
9906 | |
9907 | /* Read in the largest possible address. */ | |
9908 | marker = read_address (obfd, buffer, cu, &dummy); | |
9909 | if ((marker & mask) == mask) | |
9910 | { | |
9911 | /* If we found the largest possible address, then | |
9912 | read the base address. */ | |
9913 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
9914 | buffer += 2 * addr_size; | |
9915 | offset += 2 * addr_size; | |
9916 | found_base = 1; | |
9917 | } | |
9918 | ||
9919 | low_set = 0; | |
9920 | ||
e7030f15 | 9921 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 9922 | |
43039443 JK |
9923 | while (1) |
9924 | { | |
9925 | CORE_ADDR range_beginning, range_end; | |
9926 | ||
9927 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
9928 | buffer += addr_size; | |
9929 | range_end = read_address (obfd, buffer, cu, &dummy); | |
9930 | buffer += addr_size; | |
9931 | offset += 2 * addr_size; | |
9932 | ||
9933 | /* An end of list marker is a pair of zero addresses. */ | |
9934 | if (range_beginning == 0 && range_end == 0) | |
9935 | /* Found the end of list entry. */ | |
9936 | break; | |
9937 | ||
9938 | /* Each base address selection entry is a pair of 2 values. | |
9939 | The first is the largest possible address, the second is | |
9940 | the base address. Check for a base address here. */ | |
9941 | if ((range_beginning & mask) == mask) | |
9942 | { | |
9943 | /* If we found the largest possible address, then | |
9944 | read the base address. */ | |
9945 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
9946 | found_base = 1; | |
9947 | continue; | |
9948 | } | |
9949 | ||
9950 | if (!found_base) | |
9951 | { | |
9952 | /* We have no valid base address for the ranges | |
9953 | data. */ | |
9954 | complaint (&symfile_complaints, | |
9955 | _("Invalid .debug_ranges data (no base address)")); | |
9956 | return 0; | |
9957 | } | |
9958 | ||
9277c30c UW |
9959 | if (range_beginning > range_end) |
9960 | { | |
9961 | /* Inverted range entries are invalid. */ | |
9962 | complaint (&symfile_complaints, | |
9963 | _("Invalid .debug_ranges data (inverted range)")); | |
9964 | return 0; | |
9965 | } | |
9966 | ||
9967 | /* Empty range entries have no effect. */ | |
9968 | if (range_beginning == range_end) | |
9969 | continue; | |
9970 | ||
43039443 JK |
9971 | range_beginning += base; |
9972 | range_end += base; | |
9973 | ||
01093045 DE |
9974 | /* A not-uncommon case of bad debug info. |
9975 | Don't pollute the addrmap with bad data. */ | |
9976 | if (range_beginning + baseaddr == 0 | |
9977 | && !dwarf2_per_objfile->has_section_at_zero) | |
9978 | { | |
9979 | complaint (&symfile_complaints, | |
9980 | _(".debug_ranges entry has start address of zero" | |
9981 | " [in module %s]"), objfile->name); | |
9982 | continue; | |
9983 | } | |
9984 | ||
9277c30c | 9985 | if (ranges_pst != NULL) |
ff013f42 | 9986 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
9987 | range_beginning + baseaddr, |
9988 | range_end - 1 + baseaddr, | |
ff013f42 JK |
9989 | ranges_pst); |
9990 | ||
43039443 JK |
9991 | /* FIXME: This is recording everything as a low-high |
9992 | segment of consecutive addresses. We should have a | |
9993 | data structure for discontiguous block ranges | |
9994 | instead. */ | |
9995 | if (! low_set) | |
9996 | { | |
9997 | low = range_beginning; | |
9998 | high = range_end; | |
9999 | low_set = 1; | |
10000 | } | |
10001 | else | |
10002 | { | |
10003 | if (range_beginning < low) | |
10004 | low = range_beginning; | |
10005 | if (range_end > high) | |
10006 | high = range_end; | |
10007 | } | |
10008 | } | |
10009 | ||
10010 | if (! low_set) | |
10011 | /* If the first entry is an end-of-list marker, the range | |
10012 | describes an empty scope, i.e. no instructions. */ | |
10013 | return 0; | |
10014 | ||
10015 | if (low_return) | |
10016 | *low_return = low; | |
10017 | if (high_return) | |
10018 | *high_return = high; | |
10019 | return 1; | |
10020 | } | |
10021 | ||
af34e669 DJ |
10022 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
10023 | are present and valid, otherwise, return 0. Return -1 if the range is | |
10024 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 10025 | |
c906108c | 10026 | static int |
af34e669 | 10027 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
10028 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
10029 | struct partial_symtab *pst) | |
c906108c SS |
10030 | { |
10031 | struct attribute *attr; | |
91da1414 | 10032 | struct attribute *attr_high; |
af34e669 DJ |
10033 | CORE_ADDR low = 0; |
10034 | CORE_ADDR high = 0; | |
10035 | int ret = 0; | |
c906108c | 10036 | |
91da1414 MW |
10037 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10038 | if (attr_high) | |
af34e669 | 10039 | { |
e142c38c | 10040 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 10041 | if (attr) |
91da1414 MW |
10042 | { |
10043 | low = DW_ADDR (attr); | |
3019eac3 DE |
10044 | if (attr_high->form == DW_FORM_addr |
10045 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10046 | high = DW_ADDR (attr_high); |
10047 | else | |
10048 | high = low + DW_UNSND (attr_high); | |
10049 | } | |
af34e669 DJ |
10050 | else |
10051 | /* Found high w/o low attribute. */ | |
10052 | return 0; | |
10053 | ||
10054 | /* Found consecutive range of addresses. */ | |
10055 | ret = 1; | |
10056 | } | |
c906108c | 10057 | else |
af34e669 | 10058 | { |
e142c38c | 10059 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
10060 | if (attr != NULL) |
10061 | { | |
ab435259 DE |
10062 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
10063 | We take advantage of the fact that DW_AT_ranges does not appear | |
10064 | in DW_TAG_compile_unit of DWO files. */ | |
10065 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
10066 | unsigned int ranges_offset = (DW_UNSND (attr) | |
10067 | + (need_ranges_base | |
10068 | ? cu->ranges_base | |
10069 | : 0)); | |
2e3cf129 | 10070 | |
af34e669 | 10071 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 10072 | .debug_ranges section. */ |
2e3cf129 | 10073 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 10074 | return 0; |
43039443 | 10075 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
10076 | ret = -1; |
10077 | } | |
10078 | } | |
c906108c | 10079 | |
9373cf26 JK |
10080 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
10081 | if (high <= low) | |
c906108c SS |
10082 | return 0; |
10083 | ||
10084 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
10085 | eliminate duplicate copies of functions and vtables and such. | |
10086 | The linker will arbitrarily choose one and discard the others. | |
10087 | The AT_*_pc values for such functions refer to local labels in | |
10088 | these sections. If the section from that file was discarded, the | |
10089 | labels are not in the output, so the relocs get a value of 0. | |
10090 | If this is a discarded function, mark the pc bounds as invalid, | |
10091 | so that GDB will ignore it. */ | |
72dca2f5 | 10092 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
10093 | return 0; |
10094 | ||
10095 | *lowpc = low; | |
96408a79 SA |
10096 | if (highpc) |
10097 | *highpc = high; | |
af34e669 | 10098 | return ret; |
c906108c SS |
10099 | } |
10100 | ||
b084d499 JB |
10101 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
10102 | its low and high PC addresses. Do nothing if these addresses could not | |
10103 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
10104 | and HIGHPC to the high address if greater than HIGHPC. */ | |
10105 | ||
10106 | static void | |
10107 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
10108 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10109 | struct dwarf2_cu *cu) | |
10110 | { | |
10111 | CORE_ADDR low, high; | |
10112 | struct die_info *child = die->child; | |
10113 | ||
d85a05f0 | 10114 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
10115 | { |
10116 | *lowpc = min (*lowpc, low); | |
10117 | *highpc = max (*highpc, high); | |
10118 | } | |
10119 | ||
10120 | /* If the language does not allow nested subprograms (either inside | |
10121 | subprograms or lexical blocks), we're done. */ | |
10122 | if (cu->language != language_ada) | |
10123 | return; | |
6e70227d | 10124 | |
b084d499 JB |
10125 | /* Check all the children of the given DIE. If it contains nested |
10126 | subprograms, then check their pc bounds. Likewise, we need to | |
10127 | check lexical blocks as well, as they may also contain subprogram | |
10128 | definitions. */ | |
10129 | while (child && child->tag) | |
10130 | { | |
10131 | if (child->tag == DW_TAG_subprogram | |
10132 | || child->tag == DW_TAG_lexical_block) | |
10133 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
10134 | child = sibling_die (child); | |
10135 | } | |
10136 | } | |
10137 | ||
fae299cd DC |
10138 | /* Get the low and high pc's represented by the scope DIE, and store |
10139 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
10140 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
10141 | ||
10142 | static void | |
10143 | get_scope_pc_bounds (struct die_info *die, | |
10144 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10145 | struct dwarf2_cu *cu) | |
10146 | { | |
10147 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
10148 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
10149 | CORE_ADDR current_low, current_high; | |
10150 | ||
d85a05f0 | 10151 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
10152 | { |
10153 | best_low = current_low; | |
10154 | best_high = current_high; | |
10155 | } | |
10156 | else | |
10157 | { | |
10158 | struct die_info *child = die->child; | |
10159 | ||
10160 | while (child && child->tag) | |
10161 | { | |
10162 | switch (child->tag) { | |
10163 | case DW_TAG_subprogram: | |
b084d499 | 10164 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
10165 | break; |
10166 | case DW_TAG_namespace: | |
f55ee35c | 10167 | case DW_TAG_module: |
fae299cd DC |
10168 | /* FIXME: carlton/2004-01-16: Should we do this for |
10169 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
10170 | that current GCC's always emit the DIEs corresponding | |
10171 | to definitions of methods of classes as children of a | |
10172 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
10173 | the DIEs giving the declarations, which could be | |
10174 | anywhere). But I don't see any reason why the | |
10175 | standards says that they have to be there. */ | |
10176 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
10177 | ||
10178 | if (current_low != ((CORE_ADDR) -1)) | |
10179 | { | |
10180 | best_low = min (best_low, current_low); | |
10181 | best_high = max (best_high, current_high); | |
10182 | } | |
10183 | break; | |
10184 | default: | |
0963b4bd | 10185 | /* Ignore. */ |
fae299cd DC |
10186 | break; |
10187 | } | |
10188 | ||
10189 | child = sibling_die (child); | |
10190 | } | |
10191 | } | |
10192 | ||
10193 | *lowpc = best_low; | |
10194 | *highpc = best_high; | |
10195 | } | |
10196 | ||
801e3a5b JB |
10197 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
10198 | in DIE. */ | |
380bca97 | 10199 | |
801e3a5b JB |
10200 | static void |
10201 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
10202 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
10203 | { | |
bb5ed363 | 10204 | struct objfile *objfile = cu->objfile; |
801e3a5b | 10205 | struct attribute *attr; |
91da1414 | 10206 | struct attribute *attr_high; |
801e3a5b | 10207 | |
91da1414 MW |
10208 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10209 | if (attr_high) | |
801e3a5b | 10210 | { |
801e3a5b JB |
10211 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
10212 | if (attr) | |
10213 | { | |
10214 | CORE_ADDR low = DW_ADDR (attr); | |
91da1414 | 10215 | CORE_ADDR high; |
3019eac3 DE |
10216 | if (attr_high->form == DW_FORM_addr |
10217 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10218 | high = DW_ADDR (attr_high); |
10219 | else | |
10220 | high = low + DW_UNSND (attr_high); | |
9a619af0 | 10221 | |
801e3a5b JB |
10222 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
10223 | } | |
10224 | } | |
10225 | ||
10226 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
10227 | if (attr) | |
10228 | { | |
bb5ed363 | 10229 | bfd *obfd = objfile->obfd; |
ab435259 DE |
10230 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
10231 | We take advantage of the fact that DW_AT_ranges does not appear | |
10232 | in DW_TAG_compile_unit of DWO files. */ | |
10233 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
10234 | |
10235 | /* The value of the DW_AT_ranges attribute is the offset of the | |
10236 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
10237 | unsigned long offset = (DW_UNSND (attr) |
10238 | + (need_ranges_base ? cu->ranges_base : 0)); | |
dce234bc | 10239 | gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
10240 | |
10241 | /* For some target architectures, but not others, the | |
10242 | read_address function sign-extends the addresses it returns. | |
10243 | To recognize base address selection entries, we need a | |
10244 | mask. */ | |
10245 | unsigned int addr_size = cu->header.addr_size; | |
10246 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
10247 | ||
10248 | /* The base address, to which the next pair is relative. Note | |
10249 | that this 'base' is a DWARF concept: most entries in a range | |
10250 | list are relative, to reduce the number of relocs against the | |
10251 | debugging information. This is separate from this function's | |
10252 | 'baseaddr' argument, which GDB uses to relocate debugging | |
10253 | information from a shared library based on the address at | |
10254 | which the library was loaded. */ | |
d00adf39 DE |
10255 | CORE_ADDR base = cu->base_address; |
10256 | int base_known = cu->base_known; | |
801e3a5b | 10257 | |
be391dca | 10258 | gdb_assert (dwarf2_per_objfile->ranges.readin); |
dce234bc | 10259 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
10260 | { |
10261 | complaint (&symfile_complaints, | |
10262 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
10263 | offset); | |
10264 | return; | |
10265 | } | |
10266 | ||
10267 | for (;;) | |
10268 | { | |
10269 | unsigned int bytes_read; | |
10270 | CORE_ADDR start, end; | |
10271 | ||
10272 | start = read_address (obfd, buffer, cu, &bytes_read); | |
10273 | buffer += bytes_read; | |
10274 | end = read_address (obfd, buffer, cu, &bytes_read); | |
10275 | buffer += bytes_read; | |
10276 | ||
10277 | /* Did we find the end of the range list? */ | |
10278 | if (start == 0 && end == 0) | |
10279 | break; | |
10280 | ||
10281 | /* Did we find a base address selection entry? */ | |
10282 | else if ((start & base_select_mask) == base_select_mask) | |
10283 | { | |
10284 | base = end; | |
10285 | base_known = 1; | |
10286 | } | |
10287 | ||
10288 | /* We found an ordinary address range. */ | |
10289 | else | |
10290 | { | |
10291 | if (!base_known) | |
10292 | { | |
10293 | complaint (&symfile_complaints, | |
3e43a32a MS |
10294 | _("Invalid .debug_ranges data " |
10295 | "(no base address)")); | |
801e3a5b JB |
10296 | return; |
10297 | } | |
10298 | ||
9277c30c UW |
10299 | if (start > end) |
10300 | { | |
10301 | /* Inverted range entries are invalid. */ | |
10302 | complaint (&symfile_complaints, | |
10303 | _("Invalid .debug_ranges data " | |
10304 | "(inverted range)")); | |
10305 | return; | |
10306 | } | |
10307 | ||
10308 | /* Empty range entries have no effect. */ | |
10309 | if (start == end) | |
10310 | continue; | |
10311 | ||
01093045 DE |
10312 | start += base + baseaddr; |
10313 | end += base + baseaddr; | |
10314 | ||
10315 | /* A not-uncommon case of bad debug info. | |
10316 | Don't pollute the addrmap with bad data. */ | |
10317 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
10318 | { | |
10319 | complaint (&symfile_complaints, | |
10320 | _(".debug_ranges entry has start address of zero" | |
10321 | " [in module %s]"), objfile->name); | |
10322 | continue; | |
10323 | } | |
10324 | ||
10325 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
10326 | } |
10327 | } | |
10328 | } | |
10329 | } | |
10330 | ||
685b1105 JK |
10331 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
10332 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 10333 | |
685b1105 JK |
10334 | static void |
10335 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
10336 | { |
10337 | const char *cs; | |
10338 | int major, minor, release; | |
10339 | ||
10340 | if (cu->producer == NULL) | |
10341 | { | |
10342 | /* For unknown compilers expect their behavior is DWARF version | |
10343 | compliant. | |
10344 | ||
10345 | GCC started to support .debug_types sections by -gdwarf-4 since | |
10346 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
10347 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
10348 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
10349 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 10350 | } |
685b1105 | 10351 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 10352 | { |
685b1105 JK |
10353 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
10354 | ||
ba919b58 TT |
10355 | cs = &cu->producer[strlen ("GNU ")]; |
10356 | while (*cs && !isdigit (*cs)) | |
10357 | cs++; | |
10358 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
10359 | { | |
10360 | /* Not recognized as GCC. */ | |
10361 | } | |
10362 | else | |
1b80a9fa JK |
10363 | { |
10364 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
10365 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
10366 | } | |
685b1105 JK |
10367 | } |
10368 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
10369 | cu->producer_is_icc = 1; | |
10370 | else | |
10371 | { | |
10372 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
10373 | compliant. */ | |
60d5a603 JK |
10374 | } |
10375 | ||
ba919b58 | 10376 | cu->checked_producer = 1; |
685b1105 | 10377 | } |
ba919b58 | 10378 | |
685b1105 JK |
10379 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
10380 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
10381 | during 4.6.0 experimental. */ | |
10382 | ||
10383 | static int | |
10384 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
10385 | { | |
10386 | if (!cu->checked_producer) | |
10387 | check_producer (cu); | |
10388 | ||
10389 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
10390 | } |
10391 | ||
10392 | /* Return the default accessibility type if it is not overriden by | |
10393 | DW_AT_accessibility. */ | |
10394 | ||
10395 | static enum dwarf_access_attribute | |
10396 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
10397 | { | |
10398 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
10399 | { | |
10400 | /* The default DWARF 2 accessibility for members is public, the default | |
10401 | accessibility for inheritance is private. */ | |
10402 | ||
10403 | if (die->tag != DW_TAG_inheritance) | |
10404 | return DW_ACCESS_public; | |
10405 | else | |
10406 | return DW_ACCESS_private; | |
10407 | } | |
10408 | else | |
10409 | { | |
10410 | /* DWARF 3+ defines the default accessibility a different way. The same | |
10411 | rules apply now for DW_TAG_inheritance as for the members and it only | |
10412 | depends on the container kind. */ | |
10413 | ||
10414 | if (die->parent->tag == DW_TAG_class_type) | |
10415 | return DW_ACCESS_private; | |
10416 | else | |
10417 | return DW_ACCESS_public; | |
10418 | } | |
10419 | } | |
10420 | ||
74ac6d43 TT |
10421 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
10422 | offset. If the attribute was not found return 0, otherwise return | |
10423 | 1. If it was found but could not properly be handled, set *OFFSET | |
10424 | to 0. */ | |
10425 | ||
10426 | static int | |
10427 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
10428 | LONGEST *offset) | |
10429 | { | |
10430 | struct attribute *attr; | |
10431 | ||
10432 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
10433 | if (attr != NULL) | |
10434 | { | |
10435 | *offset = 0; | |
10436 | ||
10437 | /* Note that we do not check for a section offset first here. | |
10438 | This is because DW_AT_data_member_location is new in DWARF 4, | |
10439 | so if we see it, we can assume that a constant form is really | |
10440 | a constant and not a section offset. */ | |
10441 | if (attr_form_is_constant (attr)) | |
10442 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
10443 | else if (attr_form_is_section_offset (attr)) | |
10444 | dwarf2_complex_location_expr_complaint (); | |
10445 | else if (attr_form_is_block (attr)) | |
10446 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
10447 | else | |
10448 | dwarf2_complex_location_expr_complaint (); | |
10449 | ||
10450 | return 1; | |
10451 | } | |
10452 | ||
10453 | return 0; | |
10454 | } | |
10455 | ||
c906108c SS |
10456 | /* Add an aggregate field to the field list. */ |
10457 | ||
10458 | static void | |
107d2387 | 10459 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 10460 | struct dwarf2_cu *cu) |
6e70227d | 10461 | { |
e7c27a73 | 10462 | struct objfile *objfile = cu->objfile; |
5e2b427d | 10463 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
10464 | struct nextfield *new_field; |
10465 | struct attribute *attr; | |
10466 | struct field *fp; | |
10467 | char *fieldname = ""; | |
10468 | ||
10469 | /* Allocate a new field list entry and link it in. */ | |
10470 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 10471 | make_cleanup (xfree, new_field); |
c906108c | 10472 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
10473 | |
10474 | if (die->tag == DW_TAG_inheritance) | |
10475 | { | |
10476 | new_field->next = fip->baseclasses; | |
10477 | fip->baseclasses = new_field; | |
10478 | } | |
10479 | else | |
10480 | { | |
10481 | new_field->next = fip->fields; | |
10482 | fip->fields = new_field; | |
10483 | } | |
c906108c SS |
10484 | fip->nfields++; |
10485 | ||
e142c38c | 10486 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
10487 | if (attr) |
10488 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
10489 | else |
10490 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
10491 | if (new_field->accessibility != DW_ACCESS_public) |
10492 | fip->non_public_fields = 1; | |
60d5a603 | 10493 | |
e142c38c | 10494 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
10495 | if (attr) |
10496 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
10497 | else |
10498 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
10499 | |
10500 | fp = &new_field->field; | |
a9a9bd0f | 10501 | |
e142c38c | 10502 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 10503 | { |
74ac6d43 TT |
10504 | LONGEST offset; |
10505 | ||
a9a9bd0f | 10506 | /* Data member other than a C++ static data member. */ |
6e70227d | 10507 | |
c906108c | 10508 | /* Get type of field. */ |
e7c27a73 | 10509 | fp->type = die_type (die, cu); |
c906108c | 10510 | |
d6a843b5 | 10511 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 10512 | |
c906108c | 10513 | /* Get bit size of field (zero if none). */ |
e142c38c | 10514 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
10515 | if (attr) |
10516 | { | |
10517 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
10518 | } | |
10519 | else | |
10520 | { | |
10521 | FIELD_BITSIZE (*fp) = 0; | |
10522 | } | |
10523 | ||
10524 | /* Get bit offset of field. */ | |
74ac6d43 TT |
10525 | if (handle_data_member_location (die, cu, &offset)) |
10526 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 10527 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
10528 | if (attr) |
10529 | { | |
5e2b427d | 10530 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
10531 | { |
10532 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
10533 | additional bit offset from the MSB of the containing |
10534 | anonymous object to the MSB of the field. We don't | |
10535 | have to do anything special since we don't need to | |
10536 | know the size of the anonymous object. */ | |
f41f5e61 | 10537 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
10538 | } |
10539 | else | |
10540 | { | |
10541 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
10542 | MSB of the anonymous object, subtract off the number of |
10543 | bits from the MSB of the field to the MSB of the | |
10544 | object, and then subtract off the number of bits of | |
10545 | the field itself. The result is the bit offset of | |
10546 | the LSB of the field. */ | |
c906108c SS |
10547 | int anonymous_size; |
10548 | int bit_offset = DW_UNSND (attr); | |
10549 | ||
e142c38c | 10550 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
10551 | if (attr) |
10552 | { | |
10553 | /* The size of the anonymous object containing | |
10554 | the bit field is explicit, so use the | |
10555 | indicated size (in bytes). */ | |
10556 | anonymous_size = DW_UNSND (attr); | |
10557 | } | |
10558 | else | |
10559 | { | |
10560 | /* The size of the anonymous object containing | |
10561 | the bit field must be inferred from the type | |
10562 | attribute of the data member containing the | |
10563 | bit field. */ | |
10564 | anonymous_size = TYPE_LENGTH (fp->type); | |
10565 | } | |
f41f5e61 PA |
10566 | SET_FIELD_BITPOS (*fp, |
10567 | (FIELD_BITPOS (*fp) | |
10568 | + anonymous_size * bits_per_byte | |
10569 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
10570 | } |
10571 | } | |
10572 | ||
10573 | /* Get name of field. */ | |
39cbfefa DJ |
10574 | fieldname = dwarf2_name (die, cu); |
10575 | if (fieldname == NULL) | |
10576 | fieldname = ""; | |
d8151005 DJ |
10577 | |
10578 | /* The name is already allocated along with this objfile, so we don't | |
10579 | need to duplicate it for the type. */ | |
10580 | fp->name = fieldname; | |
c906108c SS |
10581 | |
10582 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 10583 | pointer or virtual base class pointer) to private. */ |
e142c38c | 10584 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 10585 | { |
d48cc9dd | 10586 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
10587 | new_field->accessibility = DW_ACCESS_private; |
10588 | fip->non_public_fields = 1; | |
10589 | } | |
10590 | } | |
a9a9bd0f | 10591 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 10592 | { |
a9a9bd0f DC |
10593 | /* C++ static member. */ |
10594 | ||
10595 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
10596 | is a declaration, but all versions of G++ as of this writing | |
10597 | (so through at least 3.2.1) incorrectly generate | |
10598 | DW_TAG_variable tags. */ | |
6e70227d | 10599 | |
ff355380 | 10600 | const char *physname; |
c906108c | 10601 | |
a9a9bd0f | 10602 | /* Get name of field. */ |
39cbfefa DJ |
10603 | fieldname = dwarf2_name (die, cu); |
10604 | if (fieldname == NULL) | |
c906108c SS |
10605 | return; |
10606 | ||
254e6b9e | 10607 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
10608 | if (attr |
10609 | /* Only create a symbol if this is an external value. | |
10610 | new_symbol checks this and puts the value in the global symbol | |
10611 | table, which we want. If it is not external, new_symbol | |
10612 | will try to put the value in cu->list_in_scope which is wrong. */ | |
10613 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
10614 | { |
10615 | /* A static const member, not much different than an enum as far as | |
10616 | we're concerned, except that we can support more types. */ | |
10617 | new_symbol (die, NULL, cu); | |
10618 | } | |
10619 | ||
2df3850c | 10620 | /* Get physical name. */ |
ff355380 | 10621 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 10622 | |
d8151005 DJ |
10623 | /* The name is already allocated along with this objfile, so we don't |
10624 | need to duplicate it for the type. */ | |
10625 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 10626 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 10627 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
10628 | } |
10629 | else if (die->tag == DW_TAG_inheritance) | |
10630 | { | |
74ac6d43 | 10631 | LONGEST offset; |
d4b96c9a | 10632 | |
74ac6d43 TT |
10633 | /* C++ base class field. */ |
10634 | if (handle_data_member_location (die, cu, &offset)) | |
10635 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 10636 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 10637 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
10638 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
10639 | fip->nbaseclasses++; | |
10640 | } | |
10641 | } | |
10642 | ||
98751a41 JK |
10643 | /* Add a typedef defined in the scope of the FIP's class. */ |
10644 | ||
10645 | static void | |
10646 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
10647 | struct dwarf2_cu *cu) | |
6e70227d | 10648 | { |
98751a41 | 10649 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
10650 | struct typedef_field_list *new_field; |
10651 | struct attribute *attr; | |
10652 | struct typedef_field *fp; | |
10653 | char *fieldname = ""; | |
10654 | ||
10655 | /* Allocate a new field list entry and link it in. */ | |
10656 | new_field = xzalloc (sizeof (*new_field)); | |
10657 | make_cleanup (xfree, new_field); | |
10658 | ||
10659 | gdb_assert (die->tag == DW_TAG_typedef); | |
10660 | ||
10661 | fp = &new_field->field; | |
10662 | ||
10663 | /* Get name of field. */ | |
10664 | fp->name = dwarf2_name (die, cu); | |
10665 | if (fp->name == NULL) | |
10666 | return; | |
10667 | ||
10668 | fp->type = read_type_die (die, cu); | |
10669 | ||
10670 | new_field->next = fip->typedef_field_list; | |
10671 | fip->typedef_field_list = new_field; | |
10672 | fip->typedef_field_list_count++; | |
10673 | } | |
10674 | ||
c906108c SS |
10675 | /* Create the vector of fields, and attach it to the type. */ |
10676 | ||
10677 | static void | |
fba45db2 | 10678 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 10679 | struct dwarf2_cu *cu) |
c906108c SS |
10680 | { |
10681 | int nfields = fip->nfields; | |
10682 | ||
10683 | /* Record the field count, allocate space for the array of fields, | |
10684 | and create blank accessibility bitfields if necessary. */ | |
10685 | TYPE_NFIELDS (type) = nfields; | |
10686 | TYPE_FIELDS (type) = (struct field *) | |
10687 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
10688 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
10689 | ||
b4ba55a1 | 10690 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
10691 | { |
10692 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
10693 | ||
10694 | TYPE_FIELD_PRIVATE_BITS (type) = | |
10695 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10696 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
10697 | ||
10698 | TYPE_FIELD_PROTECTED_BITS (type) = | |
10699 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10700 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
10701 | ||
774b6a14 TT |
10702 | TYPE_FIELD_IGNORE_BITS (type) = |
10703 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10704 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
10705 | } |
10706 | ||
10707 | /* If the type has baseclasses, allocate and clear a bit vector for | |
10708 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 10709 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
10710 | { |
10711 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 10712 | unsigned char *pointer; |
c906108c SS |
10713 | |
10714 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
10715 | pointer = TYPE_ALLOC (type, num_bytes); |
10716 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
10717 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
10718 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
10719 | } | |
10720 | ||
3e43a32a MS |
10721 | /* Copy the saved-up fields into the field vector. Start from the head of |
10722 | the list, adding to the tail of the field array, so that they end up in | |
10723 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
10724 | while (nfields-- > 0) |
10725 | { | |
7d0ccb61 DJ |
10726 | struct nextfield *fieldp; |
10727 | ||
10728 | if (fip->fields) | |
10729 | { | |
10730 | fieldp = fip->fields; | |
10731 | fip->fields = fieldp->next; | |
10732 | } | |
10733 | else | |
10734 | { | |
10735 | fieldp = fip->baseclasses; | |
10736 | fip->baseclasses = fieldp->next; | |
10737 | } | |
10738 | ||
10739 | TYPE_FIELD (type, nfields) = fieldp->field; | |
10740 | switch (fieldp->accessibility) | |
c906108c | 10741 | { |
c5aa993b | 10742 | case DW_ACCESS_private: |
b4ba55a1 JB |
10743 | if (cu->language != language_ada) |
10744 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 10745 | break; |
c906108c | 10746 | |
c5aa993b | 10747 | case DW_ACCESS_protected: |
b4ba55a1 JB |
10748 | if (cu->language != language_ada) |
10749 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 10750 | break; |
c906108c | 10751 | |
c5aa993b JM |
10752 | case DW_ACCESS_public: |
10753 | break; | |
c906108c | 10754 | |
c5aa993b JM |
10755 | default: |
10756 | /* Unknown accessibility. Complain and treat it as public. */ | |
10757 | { | |
e2e0b3e5 | 10758 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 10759 | fieldp->accessibility); |
c5aa993b JM |
10760 | } |
10761 | break; | |
c906108c SS |
10762 | } |
10763 | if (nfields < fip->nbaseclasses) | |
10764 | { | |
7d0ccb61 | 10765 | switch (fieldp->virtuality) |
c906108c | 10766 | { |
c5aa993b JM |
10767 | case DW_VIRTUALITY_virtual: |
10768 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 10769 | if (cu->language == language_ada) |
a73c6dcd | 10770 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
10771 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
10772 | break; | |
c906108c SS |
10773 | } |
10774 | } | |
c906108c SS |
10775 | } |
10776 | } | |
10777 | ||
7d27a96d TT |
10778 | /* Return true if this member function is a constructor, false |
10779 | otherwise. */ | |
10780 | ||
10781 | static int | |
10782 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
10783 | { | |
10784 | const char *fieldname; | |
10785 | const char *typename; | |
10786 | int len; | |
10787 | ||
10788 | if (die->parent == NULL) | |
10789 | return 0; | |
10790 | ||
10791 | if (die->parent->tag != DW_TAG_structure_type | |
10792 | && die->parent->tag != DW_TAG_union_type | |
10793 | && die->parent->tag != DW_TAG_class_type) | |
10794 | return 0; | |
10795 | ||
10796 | fieldname = dwarf2_name (die, cu); | |
10797 | typename = dwarf2_name (die->parent, cu); | |
10798 | if (fieldname == NULL || typename == NULL) | |
10799 | return 0; | |
10800 | ||
10801 | len = strlen (fieldname); | |
10802 | return (strncmp (fieldname, typename, len) == 0 | |
10803 | && (typename[len] == '\0' || typename[len] == '<')); | |
10804 | } | |
10805 | ||
c906108c SS |
10806 | /* Add a member function to the proper fieldlist. */ |
10807 | ||
10808 | static void | |
107d2387 | 10809 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 10810 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 10811 | { |
e7c27a73 | 10812 | struct objfile *objfile = cu->objfile; |
c906108c SS |
10813 | struct attribute *attr; |
10814 | struct fnfieldlist *flp; | |
10815 | int i; | |
10816 | struct fn_field *fnp; | |
10817 | char *fieldname; | |
c906108c | 10818 | struct nextfnfield *new_fnfield; |
f792889a | 10819 | struct type *this_type; |
60d5a603 | 10820 | enum dwarf_access_attribute accessibility; |
c906108c | 10821 | |
b4ba55a1 | 10822 | if (cu->language == language_ada) |
a73c6dcd | 10823 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 10824 | |
2df3850c | 10825 | /* Get name of member function. */ |
39cbfefa DJ |
10826 | fieldname = dwarf2_name (die, cu); |
10827 | if (fieldname == NULL) | |
2df3850c | 10828 | return; |
c906108c | 10829 | |
c906108c SS |
10830 | /* Look up member function name in fieldlist. */ |
10831 | for (i = 0; i < fip->nfnfields; i++) | |
10832 | { | |
27bfe10e | 10833 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
10834 | break; |
10835 | } | |
10836 | ||
10837 | /* Create new list element if necessary. */ | |
10838 | if (i < fip->nfnfields) | |
10839 | flp = &fip->fnfieldlists[i]; | |
10840 | else | |
10841 | { | |
10842 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
10843 | { | |
10844 | fip->fnfieldlists = (struct fnfieldlist *) | |
10845 | xrealloc (fip->fnfieldlists, | |
10846 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 10847 | * sizeof (struct fnfieldlist)); |
c906108c | 10848 | if (fip->nfnfields == 0) |
c13c43fd | 10849 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
10850 | } |
10851 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
10852 | flp->name = fieldname; | |
10853 | flp->length = 0; | |
10854 | flp->head = NULL; | |
3da10d80 | 10855 | i = fip->nfnfields++; |
c906108c SS |
10856 | } |
10857 | ||
10858 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 10859 | entry. */ |
c906108c | 10860 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 10861 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
10862 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
10863 | new_fnfield->next = flp->head; | |
10864 | flp->head = new_fnfield; | |
10865 | flp->length++; | |
10866 | ||
10867 | /* Fill in the member function field info. */ | |
10868 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
10869 | |
10870 | /* Delay processing of the physname until later. */ | |
10871 | if (cu->language == language_cplus || cu->language == language_java) | |
10872 | { | |
10873 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
10874 | die, cu); | |
10875 | } | |
10876 | else | |
10877 | { | |
1d06ead6 | 10878 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
10879 | fnp->physname = physname ? physname : ""; |
10880 | } | |
10881 | ||
c906108c | 10882 | fnp->type = alloc_type (objfile); |
f792889a DJ |
10883 | this_type = read_type_die (die, cu); |
10884 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 10885 | { |
f792889a | 10886 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 10887 | |
f792889a | 10888 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
10889 | of the method itself (TYPE_CODE_METHOD). */ |
10890 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
10891 | TYPE_TARGET_TYPE (this_type), |
10892 | TYPE_FIELDS (this_type), | |
10893 | TYPE_NFIELDS (this_type), | |
10894 | TYPE_VARARGS (this_type)); | |
c906108c SS |
10895 | |
10896 | /* Handle static member functions. | |
c5aa993b | 10897 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
10898 | member functions. G++ helps GDB by marking the first |
10899 | parameter for non-static member functions (which is the this | |
10900 | pointer) as artificial. We obtain this information from | |
10901 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 10902 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
10903 | fnp->voffset = VOFFSET_STATIC; |
10904 | } | |
10905 | else | |
e2e0b3e5 | 10906 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 10907 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
10908 | |
10909 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 10910 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 10911 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 10912 | |
3e43a32a MS |
10913 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
10914 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
10915 | |
10916 | /* Get accessibility. */ | |
e142c38c | 10917 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 10918 | if (attr) |
60d5a603 JK |
10919 | accessibility = DW_UNSND (attr); |
10920 | else | |
10921 | accessibility = dwarf2_default_access_attribute (die, cu); | |
10922 | switch (accessibility) | |
c906108c | 10923 | { |
60d5a603 JK |
10924 | case DW_ACCESS_private: |
10925 | fnp->is_private = 1; | |
10926 | break; | |
10927 | case DW_ACCESS_protected: | |
10928 | fnp->is_protected = 1; | |
10929 | break; | |
c906108c SS |
10930 | } |
10931 | ||
b02dede2 | 10932 | /* Check for artificial methods. */ |
e142c38c | 10933 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
10934 | if (attr && DW_UNSND (attr) != 0) |
10935 | fnp->is_artificial = 1; | |
10936 | ||
7d27a96d TT |
10937 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
10938 | ||
0d564a31 | 10939 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
10940 | function. For older versions of GCC, this is an offset in the |
10941 | appropriate virtual table, as specified by DW_AT_containing_type. | |
10942 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
10943 | to the object address. */ |
10944 | ||
e142c38c | 10945 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 10946 | if (attr) |
8e19ed76 | 10947 | { |
aec5aa8b | 10948 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 10949 | { |
aec5aa8b TT |
10950 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
10951 | { | |
10952 | /* Old-style GCC. */ | |
10953 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
10954 | } | |
10955 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
10956 | || (DW_BLOCK (attr)->size > 1 | |
10957 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
10958 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
10959 | { | |
10960 | struct dwarf_block blk; | |
10961 | int offset; | |
10962 | ||
10963 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
10964 | ? 1 : 2); | |
10965 | blk.size = DW_BLOCK (attr)->size - offset; | |
10966 | blk.data = DW_BLOCK (attr)->data + offset; | |
10967 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
10968 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
10969 | dwarf2_complex_location_expr_complaint (); | |
10970 | else | |
10971 | fnp->voffset /= cu->header.addr_size; | |
10972 | fnp->voffset += 2; | |
10973 | } | |
10974 | else | |
10975 | dwarf2_complex_location_expr_complaint (); | |
10976 | ||
10977 | if (!fnp->fcontext) | |
10978 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
10979 | } | |
3690dd37 | 10980 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 10981 | { |
4d3c2250 | 10982 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
10983 | } |
10984 | else | |
10985 | { | |
4d3c2250 KB |
10986 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
10987 | fieldname); | |
8e19ed76 | 10988 | } |
0d564a31 | 10989 | } |
d48cc9dd DJ |
10990 | else |
10991 | { | |
10992 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
10993 | if (attr && DW_UNSND (attr)) | |
10994 | { | |
10995 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
10996 | complaint (&symfile_complaints, | |
3e43a32a MS |
10997 | _("Member function \"%s\" (offset %d) is virtual " |
10998 | "but the vtable offset is not specified"), | |
b64f50a1 | 10999 | fieldname, die->offset.sect_off); |
9655fd1a | 11000 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
11001 | TYPE_CPLUS_DYNAMIC (type) = 1; |
11002 | } | |
11003 | } | |
c906108c SS |
11004 | } |
11005 | ||
11006 | /* Create the vector of member function fields, and attach it to the type. */ | |
11007 | ||
11008 | static void | |
fba45db2 | 11009 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 11010 | struct dwarf2_cu *cu) |
c906108c SS |
11011 | { |
11012 | struct fnfieldlist *flp; | |
c906108c SS |
11013 | int i; |
11014 | ||
b4ba55a1 | 11015 | if (cu->language == language_ada) |
a73c6dcd | 11016 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 11017 | |
c906108c SS |
11018 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
11019 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
11020 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
11021 | ||
11022 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
11023 | { | |
11024 | struct nextfnfield *nfp = flp->head; | |
11025 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
11026 | int k; | |
11027 | ||
11028 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
11029 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
11030 | fn_flp->fn_fields = (struct fn_field *) | |
11031 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
11032 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 11033 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
11034 | } |
11035 | ||
11036 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
11037 | } |
11038 | ||
1168df01 JB |
11039 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
11040 | language, zero otherwise. */ | |
11041 | static int | |
11042 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
11043 | { | |
11044 | static const char vptr[] = "_vptr"; | |
987504bb | 11045 | static const char vtable[] = "vtable"; |
1168df01 | 11046 | |
987504bb JJ |
11047 | /* Look for the C++ and Java forms of the vtable. */ |
11048 | if ((cu->language == language_java | |
11049 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
11050 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
11051 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
11052 | return 1; |
11053 | ||
11054 | return 0; | |
11055 | } | |
11056 | ||
c0dd20ea | 11057 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
11058 | functions, with the ABI-specified layout. If TYPE describes |
11059 | such a structure, smash it into a member function type. | |
61049d3b DJ |
11060 | |
11061 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
11062 | This is GCC PR debug/28767. */ | |
c0dd20ea | 11063 | |
0b92b5bb TT |
11064 | static void |
11065 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 11066 | { |
0b92b5bb | 11067 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
11068 | |
11069 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
11070 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
11071 | return; | |
c0dd20ea DJ |
11072 | |
11073 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
11074 | if (TYPE_FIELD_NAME (type, 0) == NULL |
11075 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
11076 | || TYPE_FIELD_NAME (type, 1) == NULL | |
11077 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
11078 | return; | |
c0dd20ea DJ |
11079 | |
11080 | /* Find the type of the method. */ | |
0b92b5bb | 11081 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
11082 | if (pfn_type == NULL |
11083 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
11084 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 11085 | return; |
c0dd20ea DJ |
11086 | |
11087 | /* Look for the "this" argument. */ | |
11088 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
11089 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 11090 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 11091 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 11092 | return; |
c0dd20ea DJ |
11093 | |
11094 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
11095 | new_type = alloc_type (objfile); |
11096 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
11097 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
11098 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 11099 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 11100 | } |
1168df01 | 11101 | |
685b1105 JK |
11102 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
11103 | (icc). */ | |
11104 | ||
11105 | static int | |
11106 | producer_is_icc (struct dwarf2_cu *cu) | |
11107 | { | |
11108 | if (!cu->checked_producer) | |
11109 | check_producer (cu); | |
11110 | ||
11111 | return cu->producer_is_icc; | |
11112 | } | |
11113 | ||
c906108c | 11114 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
11115 | (definition) to create a type for the structure or union. Fill in |
11116 | the type's name and general properties; the members will not be | |
11117 | processed until process_structure_type. | |
c906108c | 11118 | |
c767944b DJ |
11119 | NOTE: we need to call these functions regardless of whether or not the |
11120 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c SS |
11121 | structure or union. This gets the type entered into our set of |
11122 | user defined types. | |
11123 | ||
11124 | However, if the structure is incomplete (an opaque struct/union) | |
11125 | then suppress creating a symbol table entry for it since gdb only | |
11126 | wants to find the one with the complete definition. Note that if | |
11127 | it is complete, we just call new_symbol, which does it's own | |
11128 | checking about whether the struct/union is anonymous or not (and | |
11129 | suppresses creating a symbol table entry itself). */ | |
11130 | ||
f792889a | 11131 | static struct type * |
134d01f1 | 11132 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11133 | { |
e7c27a73 | 11134 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11135 | struct type *type; |
11136 | struct attribute *attr; | |
39cbfefa | 11137 | char *name; |
c906108c | 11138 | |
348e048f DE |
11139 | /* If the definition of this type lives in .debug_types, read that type. |
11140 | Don't follow DW_AT_specification though, that will take us back up | |
11141 | the chain and we want to go down. */ | |
45e58e77 | 11142 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11143 | if (attr) |
11144 | { | |
11145 | struct dwarf2_cu *type_cu = cu; | |
11146 | struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu); | |
9a619af0 | 11147 | |
348e048f DE |
11148 | /* We could just recurse on read_structure_type, but we need to call |
11149 | get_die_type to ensure only one type for this DIE is created. | |
11150 | This is important, for example, because for c++ classes we need | |
11151 | TYPE_NAME set which is only done by new_symbol. Blech. */ | |
11152 | type = read_type_die (type_die, type_cu); | |
9dc481d3 DE |
11153 | |
11154 | /* TYPE_CU may not be the same as CU. | |
11155 | Ensure TYPE is recorded in CU's type_hash table. */ | |
348e048f DE |
11156 | return set_die_type (die, type, cu); |
11157 | } | |
11158 | ||
c0dd20ea | 11159 | type = alloc_type (objfile); |
c906108c | 11160 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 11161 | |
39cbfefa DJ |
11162 | name = dwarf2_name (die, cu); |
11163 | if (name != NULL) | |
c906108c | 11164 | { |
987504bb JJ |
11165 | if (cu->language == language_cplus |
11166 | || cu->language == language_java) | |
63d06c5c | 11167 | { |
3da10d80 KS |
11168 | char *full_name = (char *) dwarf2_full_name (name, die, cu); |
11169 | ||
11170 | /* dwarf2_full_name might have already finished building the DIE's | |
11171 | type. If so, there is no need to continue. */ | |
11172 | if (get_die_type (die, cu) != NULL) | |
11173 | return get_die_type (die, cu); | |
11174 | ||
11175 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
11176 | if (die->tag == DW_TAG_structure_type |
11177 | || die->tag == DW_TAG_class_type) | |
11178 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
11179 | } |
11180 | else | |
11181 | { | |
d8151005 DJ |
11182 | /* The name is already allocated along with this objfile, so |
11183 | we don't need to duplicate it for the type. */ | |
94af9270 KS |
11184 | TYPE_TAG_NAME (type) = (char *) name; |
11185 | if (die->tag == DW_TAG_class_type) | |
11186 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 11187 | } |
c906108c SS |
11188 | } |
11189 | ||
11190 | if (die->tag == DW_TAG_structure_type) | |
11191 | { | |
11192 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
11193 | } | |
11194 | else if (die->tag == DW_TAG_union_type) | |
11195 | { | |
11196 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
11197 | } | |
11198 | else | |
11199 | { | |
c906108c SS |
11200 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
11201 | } | |
11202 | ||
0cc2414c TT |
11203 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
11204 | TYPE_DECLARED_CLASS (type) = 1; | |
11205 | ||
e142c38c | 11206 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11207 | if (attr) |
11208 | { | |
11209 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11210 | } | |
11211 | else | |
11212 | { | |
11213 | TYPE_LENGTH (type) = 0; | |
11214 | } | |
11215 | ||
685b1105 JK |
11216 | if (producer_is_icc (cu)) |
11217 | { | |
11218 | /* ICC does not output the required DW_AT_declaration | |
11219 | on incomplete types, but gives them a size of zero. */ | |
11220 | } | |
11221 | else | |
11222 | TYPE_STUB_SUPPORTED (type) = 1; | |
11223 | ||
dc718098 | 11224 | if (die_is_declaration (die, cu)) |
876cecd0 | 11225 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
11226 | else if (attr == NULL && die->child == NULL |
11227 | && producer_is_realview (cu->producer)) | |
11228 | /* RealView does not output the required DW_AT_declaration | |
11229 | on incomplete types. */ | |
11230 | TYPE_STUB (type) = 1; | |
dc718098 | 11231 | |
c906108c SS |
11232 | /* We need to add the type field to the die immediately so we don't |
11233 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 11234 | type within the structure itself. */ |
1c379e20 | 11235 | set_die_type (die, type, cu); |
c906108c | 11236 | |
7e314c57 JK |
11237 | /* set_die_type should be already done. */ |
11238 | set_descriptive_type (type, die, cu); | |
11239 | ||
c767944b DJ |
11240 | return type; |
11241 | } | |
11242 | ||
11243 | /* Finish creating a structure or union type, including filling in | |
11244 | its members and creating a symbol for it. */ | |
11245 | ||
11246 | static void | |
11247 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11248 | { | |
11249 | struct objfile *objfile = cu->objfile; | |
11250 | struct die_info *child_die = die->child; | |
11251 | struct type *type; | |
11252 | ||
11253 | type = get_die_type (die, cu); | |
11254 | if (type == NULL) | |
11255 | type = read_structure_type (die, cu); | |
11256 | ||
e142c38c | 11257 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
11258 | { |
11259 | struct field_info fi; | |
11260 | struct die_info *child_die; | |
34eaf542 | 11261 | VEC (symbolp) *template_args = NULL; |
c767944b | 11262 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
11263 | |
11264 | memset (&fi, 0, sizeof (struct field_info)); | |
11265 | ||
639d11d3 | 11266 | child_die = die->child; |
c906108c SS |
11267 | |
11268 | while (child_die && child_die->tag) | |
11269 | { | |
a9a9bd0f DC |
11270 | if (child_die->tag == DW_TAG_member |
11271 | || child_die->tag == DW_TAG_variable) | |
c906108c | 11272 | { |
a9a9bd0f DC |
11273 | /* NOTE: carlton/2002-11-05: A C++ static data member |
11274 | should be a DW_TAG_member that is a declaration, but | |
11275 | all versions of G++ as of this writing (so through at | |
11276 | least 3.2.1) incorrectly generate DW_TAG_variable | |
11277 | tags for them instead. */ | |
e7c27a73 | 11278 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11279 | } |
8713b1b1 | 11280 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 11281 | { |
0963b4bd | 11282 | /* C++ member function. */ |
e7c27a73 | 11283 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
11284 | } |
11285 | else if (child_die->tag == DW_TAG_inheritance) | |
11286 | { | |
11287 | /* C++ base class field. */ | |
e7c27a73 | 11288 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11289 | } |
98751a41 JK |
11290 | else if (child_die->tag == DW_TAG_typedef) |
11291 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
11292 | else if (child_die->tag == DW_TAG_template_type_param |
11293 | || child_die->tag == DW_TAG_template_value_param) | |
11294 | { | |
11295 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11296 | ||
f1078f66 DJ |
11297 | if (arg != NULL) |
11298 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11299 | } |
11300 | ||
c906108c SS |
11301 | child_die = sibling_die (child_die); |
11302 | } | |
11303 | ||
34eaf542 TT |
11304 | /* Attach template arguments to type. */ |
11305 | if (! VEC_empty (symbolp, template_args)) | |
11306 | { | |
11307 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
11308 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11309 | = VEC_length (symbolp, template_args); | |
11310 | TYPE_TEMPLATE_ARGUMENTS (type) | |
11311 | = obstack_alloc (&objfile->objfile_obstack, | |
11312 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11313 | * sizeof (struct symbol *))); | |
11314 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
11315 | VEC_address (symbolp, template_args), | |
11316 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11317 | * sizeof (struct symbol *))); | |
11318 | VEC_free (symbolp, template_args); | |
11319 | } | |
11320 | ||
c906108c SS |
11321 | /* Attach fields and member functions to the type. */ |
11322 | if (fi.nfields) | |
e7c27a73 | 11323 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
11324 | if (fi.nfnfields) |
11325 | { | |
e7c27a73 | 11326 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 11327 | |
c5aa993b | 11328 | /* Get the type which refers to the base class (possibly this |
c906108c | 11329 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
11330 | class from the DW_AT_containing_type attribute. This use of |
11331 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 11332 | |
e142c38c | 11333 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 11334 | { |
e7c27a73 | 11335 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
11336 | |
11337 | TYPE_VPTR_BASETYPE (type) = t; | |
11338 | if (type == t) | |
11339 | { | |
c906108c SS |
11340 | int i; |
11341 | ||
11342 | /* Our own class provides vtbl ptr. */ | |
11343 | for (i = TYPE_NFIELDS (t) - 1; | |
11344 | i >= TYPE_N_BASECLASSES (t); | |
11345 | --i) | |
11346 | { | |
0d5cff50 | 11347 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 11348 | |
1168df01 | 11349 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
11350 | { |
11351 | TYPE_VPTR_FIELDNO (type) = i; | |
11352 | break; | |
11353 | } | |
11354 | } | |
11355 | ||
11356 | /* Complain if virtual function table field not found. */ | |
11357 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 11358 | complaint (&symfile_complaints, |
3e43a32a MS |
11359 | _("virtual function table pointer " |
11360 | "not found when defining class '%s'"), | |
4d3c2250 KB |
11361 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
11362 | ""); | |
c906108c SS |
11363 | } |
11364 | else | |
11365 | { | |
11366 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
11367 | } | |
11368 | } | |
f6235d4c EZ |
11369 | else if (cu->producer |
11370 | && strncmp (cu->producer, | |
11371 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
11372 | { | |
11373 | /* The IBM XLC compiler does not provide direct indication | |
11374 | of the containing type, but the vtable pointer is | |
11375 | always named __vfp. */ | |
11376 | ||
11377 | int i; | |
11378 | ||
11379 | for (i = TYPE_NFIELDS (type) - 1; | |
11380 | i >= TYPE_N_BASECLASSES (type); | |
11381 | --i) | |
11382 | { | |
11383 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
11384 | { | |
11385 | TYPE_VPTR_FIELDNO (type) = i; | |
11386 | TYPE_VPTR_BASETYPE (type) = type; | |
11387 | break; | |
11388 | } | |
11389 | } | |
11390 | } | |
c906108c | 11391 | } |
98751a41 JK |
11392 | |
11393 | /* Copy fi.typedef_field_list linked list elements content into the | |
11394 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
11395 | if (fi.typedef_field_list) | |
11396 | { | |
11397 | int i = fi.typedef_field_list_count; | |
11398 | ||
a0d7a4ff | 11399 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
11400 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
11401 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
11402 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
11403 | ||
11404 | /* Reverse the list order to keep the debug info elements order. */ | |
11405 | while (--i >= 0) | |
11406 | { | |
11407 | struct typedef_field *dest, *src; | |
6e70227d | 11408 | |
98751a41 JK |
11409 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
11410 | src = &fi.typedef_field_list->field; | |
11411 | fi.typedef_field_list = fi.typedef_field_list->next; | |
11412 | *dest = *src; | |
11413 | } | |
11414 | } | |
c767944b DJ |
11415 | |
11416 | do_cleanups (back_to); | |
eb2a6f42 TT |
11417 | |
11418 | if (HAVE_CPLUS_STRUCT (type)) | |
11419 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 11420 | } |
63d06c5c | 11421 | |
bb5ed363 | 11422 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 11423 | |
90aeadfc DC |
11424 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
11425 | snapshots) has been known to create a die giving a declaration | |
11426 | for a class that has, as a child, a die giving a definition for a | |
11427 | nested class. So we have to process our children even if the | |
11428 | current die is a declaration. Normally, of course, a declaration | |
11429 | won't have any children at all. */ | |
134d01f1 | 11430 | |
90aeadfc DC |
11431 | while (child_die != NULL && child_die->tag) |
11432 | { | |
11433 | if (child_die->tag == DW_TAG_member | |
11434 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
11435 | || child_die->tag == DW_TAG_inheritance |
11436 | || child_die->tag == DW_TAG_template_value_param | |
11437 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 11438 | { |
90aeadfc | 11439 | /* Do nothing. */ |
134d01f1 | 11440 | } |
90aeadfc DC |
11441 | else |
11442 | process_die (child_die, cu); | |
134d01f1 | 11443 | |
90aeadfc | 11444 | child_die = sibling_die (child_die); |
134d01f1 DJ |
11445 | } |
11446 | ||
fa4028e9 JB |
11447 | /* Do not consider external references. According to the DWARF standard, |
11448 | these DIEs are identified by the fact that they have no byte_size | |
11449 | attribute, and a declaration attribute. */ | |
11450 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
11451 | || !die_is_declaration (die, cu)) | |
c767944b | 11452 | new_symbol (die, type, cu); |
134d01f1 DJ |
11453 | } |
11454 | ||
11455 | /* Given a DW_AT_enumeration_type die, set its type. We do not | |
11456 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 11457 | |
f792889a | 11458 | static struct type * |
134d01f1 | 11459 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11460 | { |
e7c27a73 | 11461 | struct objfile *objfile = cu->objfile; |
c906108c | 11462 | struct type *type; |
c906108c | 11463 | struct attribute *attr; |
0114d602 | 11464 | const char *name; |
134d01f1 | 11465 | |
348e048f DE |
11466 | /* If the definition of this type lives in .debug_types, read that type. |
11467 | Don't follow DW_AT_specification though, that will take us back up | |
11468 | the chain and we want to go down. */ | |
45e58e77 | 11469 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11470 | if (attr) |
11471 | { | |
11472 | struct dwarf2_cu *type_cu = cu; | |
11473 | struct die_info *type_die = follow_die_ref_or_sig (die, attr, &type_cu); | |
9a619af0 | 11474 | |
348e048f | 11475 | type = read_type_die (type_die, type_cu); |
9dc481d3 DE |
11476 | |
11477 | /* TYPE_CU may not be the same as CU. | |
11478 | Ensure TYPE is recorded in CU's type_hash table. */ | |
348e048f DE |
11479 | return set_die_type (die, type, cu); |
11480 | } | |
11481 | ||
c906108c SS |
11482 | type = alloc_type (objfile); |
11483 | ||
11484 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 11485 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 11486 | if (name != NULL) |
0114d602 | 11487 | TYPE_TAG_NAME (type) = (char *) name; |
c906108c | 11488 | |
e142c38c | 11489 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11490 | if (attr) |
11491 | { | |
11492 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11493 | } | |
11494 | else | |
11495 | { | |
11496 | TYPE_LENGTH (type) = 0; | |
11497 | } | |
11498 | ||
137033e9 JB |
11499 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
11500 | declared as private in the package spec, and then defined only | |
11501 | inside the package body. Such types are known as Taft Amendment | |
11502 | Types. When another package uses such a type, an incomplete DIE | |
11503 | may be generated by the compiler. */ | |
02eb380e | 11504 | if (die_is_declaration (die, cu)) |
876cecd0 | 11505 | TYPE_STUB (type) = 1; |
02eb380e | 11506 | |
f792889a | 11507 | return set_die_type (die, type, cu); |
134d01f1 DJ |
11508 | } |
11509 | ||
11510 | /* Given a pointer to a die which begins an enumeration, process all | |
11511 | the dies that define the members of the enumeration, and create the | |
11512 | symbol for the enumeration type. | |
11513 | ||
11514 | NOTE: We reverse the order of the element list. */ | |
11515 | ||
11516 | static void | |
11517 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11518 | { | |
f792889a | 11519 | struct type *this_type; |
134d01f1 | 11520 | |
f792889a DJ |
11521 | this_type = get_die_type (die, cu); |
11522 | if (this_type == NULL) | |
11523 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 11524 | |
639d11d3 | 11525 | if (die->child != NULL) |
c906108c | 11526 | { |
9dc481d3 DE |
11527 | struct die_info *child_die; |
11528 | struct symbol *sym; | |
11529 | struct field *fields = NULL; | |
11530 | int num_fields = 0; | |
11531 | int unsigned_enum = 1; | |
11532 | char *name; | |
cafec441 TT |
11533 | int flag_enum = 1; |
11534 | ULONGEST mask = 0; | |
9dc481d3 | 11535 | |
639d11d3 | 11536 | child_die = die->child; |
c906108c SS |
11537 | while (child_die && child_die->tag) |
11538 | { | |
11539 | if (child_die->tag != DW_TAG_enumerator) | |
11540 | { | |
e7c27a73 | 11541 | process_die (child_die, cu); |
c906108c SS |
11542 | } |
11543 | else | |
11544 | { | |
39cbfefa DJ |
11545 | name = dwarf2_name (child_die, cu); |
11546 | if (name) | |
c906108c | 11547 | { |
f792889a | 11548 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 11549 | if (SYMBOL_VALUE (sym) < 0) |
cafec441 TT |
11550 | { |
11551 | unsigned_enum = 0; | |
11552 | flag_enum = 0; | |
11553 | } | |
11554 | else if ((mask & SYMBOL_VALUE (sym)) != 0) | |
11555 | flag_enum = 0; | |
11556 | else | |
11557 | mask |= SYMBOL_VALUE (sym); | |
c906108c SS |
11558 | |
11559 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
11560 | { | |
11561 | fields = (struct field *) | |
11562 | xrealloc (fields, | |
11563 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 11564 | * sizeof (struct field)); |
c906108c SS |
11565 | } |
11566 | ||
3567439c | 11567 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 11568 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 11569 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
11570 | FIELD_BITSIZE (fields[num_fields]) = 0; |
11571 | ||
11572 | num_fields++; | |
11573 | } | |
11574 | } | |
11575 | ||
11576 | child_die = sibling_die (child_die); | |
11577 | } | |
11578 | ||
11579 | if (num_fields) | |
11580 | { | |
f792889a DJ |
11581 | TYPE_NFIELDS (this_type) = num_fields; |
11582 | TYPE_FIELDS (this_type) = (struct field *) | |
11583 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
11584 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 11585 | sizeof (struct field) * num_fields); |
b8c9b27d | 11586 | xfree (fields); |
c906108c SS |
11587 | } |
11588 | if (unsigned_enum) | |
876cecd0 | 11589 | TYPE_UNSIGNED (this_type) = 1; |
cafec441 TT |
11590 | if (flag_enum) |
11591 | TYPE_FLAG_ENUM (this_type) = 1; | |
c906108c | 11592 | } |
134d01f1 | 11593 | |
6c83ed52 TT |
11594 | /* If we are reading an enum from a .debug_types unit, and the enum |
11595 | is a declaration, and the enum is not the signatured type in the | |
11596 | unit, then we do not want to add a symbol for it. Adding a | |
11597 | symbol would in some cases obscure the true definition of the | |
11598 | enum, giving users an incomplete type when the definition is | |
11599 | actually available. Note that we do not want to do this for all | |
11600 | enums which are just declarations, because C++0x allows forward | |
11601 | enum declarations. */ | |
3019eac3 | 11602 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
11603 | && die_is_declaration (die, cu)) |
11604 | { | |
52dc124a | 11605 | struct signatured_type *sig_type; |
6c83ed52 | 11606 | |
52dc124a | 11607 | sig_type |
6c83ed52 | 11608 | = lookup_signatured_type_at_offset (dwarf2_per_objfile->objfile, |
3019eac3 | 11609 | cu->per_cu->info_or_types_section, |
6c83ed52 | 11610 | cu->per_cu->offset); |
3019eac3 DE |
11611 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
11612 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
11613 | return; |
11614 | } | |
11615 | ||
f792889a | 11616 | new_symbol (die, this_type, cu); |
c906108c SS |
11617 | } |
11618 | ||
11619 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
11620 | the DIE's type field. For now, this only handles one dimensional | |
11621 | arrays. */ | |
11622 | ||
f792889a | 11623 | static struct type * |
e7c27a73 | 11624 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11625 | { |
e7c27a73 | 11626 | struct objfile *objfile = cu->objfile; |
c906108c | 11627 | struct die_info *child_die; |
7e314c57 | 11628 | struct type *type; |
c906108c SS |
11629 | struct type *element_type, *range_type, *index_type; |
11630 | struct type **range_types = NULL; | |
11631 | struct attribute *attr; | |
11632 | int ndim = 0; | |
11633 | struct cleanup *back_to; | |
39cbfefa | 11634 | char *name; |
c906108c | 11635 | |
e7c27a73 | 11636 | element_type = die_type (die, cu); |
c906108c | 11637 | |
7e314c57 JK |
11638 | /* The die_type call above may have already set the type for this DIE. */ |
11639 | type = get_die_type (die, cu); | |
11640 | if (type) | |
11641 | return type; | |
11642 | ||
c906108c SS |
11643 | /* Irix 6.2 native cc creates array types without children for |
11644 | arrays with unspecified length. */ | |
639d11d3 | 11645 | if (die->child == NULL) |
c906108c | 11646 | { |
46bf5051 | 11647 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 11648 | range_type = create_range_type (NULL, index_type, 0, -1); |
f792889a DJ |
11649 | type = create_array_type (NULL, element_type, range_type); |
11650 | return set_die_type (die, type, cu); | |
c906108c SS |
11651 | } |
11652 | ||
11653 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 11654 | child_die = die->child; |
c906108c SS |
11655 | while (child_die && child_die->tag) |
11656 | { | |
11657 | if (child_die->tag == DW_TAG_subrange_type) | |
11658 | { | |
f792889a | 11659 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 11660 | |
f792889a | 11661 | if (child_type != NULL) |
a02abb62 | 11662 | { |
0963b4bd MS |
11663 | /* The range type was succesfully read. Save it for the |
11664 | array type creation. */ | |
a02abb62 JB |
11665 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
11666 | { | |
11667 | range_types = (struct type **) | |
11668 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
11669 | * sizeof (struct type *)); | |
11670 | if (ndim == 0) | |
11671 | make_cleanup (free_current_contents, &range_types); | |
11672 | } | |
f792889a | 11673 | range_types[ndim++] = child_type; |
a02abb62 | 11674 | } |
c906108c SS |
11675 | } |
11676 | child_die = sibling_die (child_die); | |
11677 | } | |
11678 | ||
11679 | /* Dwarf2 dimensions are output from left to right, create the | |
11680 | necessary array types in backwards order. */ | |
7ca2d3a3 | 11681 | |
c906108c | 11682 | type = element_type; |
7ca2d3a3 DL |
11683 | |
11684 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
11685 | { | |
11686 | int i = 0; | |
9a619af0 | 11687 | |
7ca2d3a3 DL |
11688 | while (i < ndim) |
11689 | type = create_array_type (NULL, type, range_types[i++]); | |
11690 | } | |
11691 | else | |
11692 | { | |
11693 | while (ndim-- > 0) | |
11694 | type = create_array_type (NULL, type, range_types[ndim]); | |
11695 | } | |
c906108c | 11696 | |
f5f8a009 EZ |
11697 | /* Understand Dwarf2 support for vector types (like they occur on |
11698 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
11699 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
11700 | custom vendor extension. The main difference between a regular | |
11701 | array and the vector variant is that vectors are passed by value | |
11702 | to functions. */ | |
e142c38c | 11703 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 11704 | if (attr) |
ea37ba09 | 11705 | make_vector_type (type); |
f5f8a009 | 11706 | |
dbc98a8b KW |
11707 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
11708 | implementation may choose to implement triple vectors using this | |
11709 | attribute. */ | |
11710 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
11711 | if (attr) | |
11712 | { | |
11713 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
11714 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11715 | else | |
3e43a32a MS |
11716 | complaint (&symfile_complaints, |
11717 | _("DW_AT_byte_size for array type smaller " | |
11718 | "than the total size of elements")); | |
dbc98a8b KW |
11719 | } |
11720 | ||
39cbfefa DJ |
11721 | name = dwarf2_name (die, cu); |
11722 | if (name) | |
11723 | TYPE_NAME (type) = name; | |
6e70227d | 11724 | |
0963b4bd | 11725 | /* Install the type in the die. */ |
7e314c57 JK |
11726 | set_die_type (die, type, cu); |
11727 | ||
11728 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
11729 | set_descriptive_type (type, die, cu); |
11730 | ||
c906108c SS |
11731 | do_cleanups (back_to); |
11732 | ||
7e314c57 | 11733 | return type; |
c906108c SS |
11734 | } |
11735 | ||
7ca2d3a3 | 11736 | static enum dwarf_array_dim_ordering |
6e70227d | 11737 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
11738 | { |
11739 | struct attribute *attr; | |
11740 | ||
11741 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
11742 | ||
11743 | if (attr) return DW_SND (attr); | |
11744 | ||
0963b4bd MS |
11745 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
11746 | opposite order to the dwarf2 specification, but data is still | |
11747 | laid out as per normal fortran. | |
7ca2d3a3 | 11748 | |
0963b4bd MS |
11749 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
11750 | version checking. */ | |
7ca2d3a3 | 11751 | |
905e0470 PM |
11752 | if (cu->language == language_fortran |
11753 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
11754 | { |
11755 | return DW_ORD_row_major; | |
11756 | } | |
11757 | ||
6e70227d | 11758 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
11759 | { |
11760 | case array_column_major: | |
11761 | return DW_ORD_col_major; | |
11762 | case array_row_major: | |
11763 | default: | |
11764 | return DW_ORD_row_major; | |
11765 | }; | |
11766 | } | |
11767 | ||
72019c9c | 11768 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 11769 | the DIE's type field. */ |
72019c9c | 11770 | |
f792889a | 11771 | static struct type * |
72019c9c GM |
11772 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
11773 | { | |
7e314c57 JK |
11774 | struct type *domain_type, *set_type; |
11775 | struct attribute *attr; | |
f792889a | 11776 | |
7e314c57 JK |
11777 | domain_type = die_type (die, cu); |
11778 | ||
11779 | /* The die_type call above may have already set the type for this DIE. */ | |
11780 | set_type = get_die_type (die, cu); | |
11781 | if (set_type) | |
11782 | return set_type; | |
11783 | ||
11784 | set_type = create_set_type (NULL, domain_type); | |
11785 | ||
11786 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
11787 | if (attr) |
11788 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 11789 | |
f792889a | 11790 | return set_die_type (die, set_type, cu); |
72019c9c | 11791 | } |
7ca2d3a3 | 11792 | |
0971de02 TT |
11793 | /* A helper for read_common_block that creates a locexpr baton. |
11794 | SYM is the symbol which we are marking as computed. | |
11795 | COMMON_DIE is the DIE for the common block. | |
11796 | COMMON_LOC is the location expression attribute for the common | |
11797 | block itself. | |
11798 | MEMBER_LOC is the location expression attribute for the particular | |
11799 | member of the common block that we are processing. | |
11800 | CU is the CU from which the above come. */ | |
11801 | ||
11802 | static void | |
11803 | mark_common_block_symbol_computed (struct symbol *sym, | |
11804 | struct die_info *common_die, | |
11805 | struct attribute *common_loc, | |
11806 | struct attribute *member_loc, | |
11807 | struct dwarf2_cu *cu) | |
11808 | { | |
11809 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11810 | struct dwarf2_locexpr_baton *baton; | |
11811 | gdb_byte *ptr; | |
11812 | unsigned int cu_off; | |
11813 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
11814 | LONGEST offset = 0; | |
11815 | ||
11816 | gdb_assert (common_loc && member_loc); | |
11817 | gdb_assert (attr_form_is_block (common_loc)); | |
11818 | gdb_assert (attr_form_is_block (member_loc) | |
11819 | || attr_form_is_constant (member_loc)); | |
11820 | ||
11821 | baton = obstack_alloc (&objfile->objfile_obstack, | |
11822 | sizeof (struct dwarf2_locexpr_baton)); | |
11823 | baton->per_cu = cu->per_cu; | |
11824 | gdb_assert (baton->per_cu); | |
11825 | ||
11826 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
11827 | ||
11828 | if (attr_form_is_constant (member_loc)) | |
11829 | { | |
11830 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
11831 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
11832 | } | |
11833 | else | |
11834 | baton->size += DW_BLOCK (member_loc)->size; | |
11835 | ||
11836 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
11837 | baton->data = ptr; | |
11838 | ||
11839 | *ptr++ = DW_OP_call4; | |
11840 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
11841 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
11842 | ptr += 4; | |
11843 | ||
11844 | if (attr_form_is_constant (member_loc)) | |
11845 | { | |
11846 | *ptr++ = DW_OP_addr; | |
11847 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
11848 | ptr += cu->header.addr_size; | |
11849 | } | |
11850 | else | |
11851 | { | |
11852 | /* We have to copy the data here, because DW_OP_call4 will only | |
11853 | use a DW_AT_location attribute. */ | |
11854 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
11855 | ptr += DW_BLOCK (member_loc)->size; | |
11856 | } | |
11857 | ||
11858 | *ptr++ = DW_OP_plus; | |
11859 | gdb_assert (ptr - baton->data == baton->size); | |
11860 | ||
11861 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs; | |
11862 | SYMBOL_LOCATION_BATON (sym) = baton; | |
11863 | SYMBOL_CLASS (sym) = LOC_COMPUTED; | |
11864 | } | |
11865 | ||
4357ac6c TT |
11866 | /* Create appropriate locally-scoped variables for all the |
11867 | DW_TAG_common_block entries. Also create a struct common_block | |
11868 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
11869 | is used to sepate the common blocks name namespace from regular | |
11870 | variable names. */ | |
c906108c SS |
11871 | |
11872 | static void | |
e7c27a73 | 11873 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11874 | { |
0971de02 TT |
11875 | struct attribute *attr; |
11876 | ||
11877 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
11878 | if (attr) | |
11879 | { | |
11880 | /* Support the .debug_loc offsets. */ | |
11881 | if (attr_form_is_block (attr)) | |
11882 | { | |
11883 | /* Ok. */ | |
11884 | } | |
11885 | else if (attr_form_is_section_offset (attr)) | |
11886 | { | |
11887 | dwarf2_complex_location_expr_complaint (); | |
11888 | attr = NULL; | |
11889 | } | |
11890 | else | |
11891 | { | |
11892 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
11893 | "common block member"); | |
11894 | attr = NULL; | |
11895 | } | |
11896 | } | |
11897 | ||
639d11d3 | 11898 | if (die->child != NULL) |
c906108c | 11899 | { |
4357ac6c TT |
11900 | struct objfile *objfile = cu->objfile; |
11901 | struct die_info *child_die; | |
11902 | size_t n_entries = 0, size; | |
11903 | struct common_block *common_block; | |
11904 | struct symbol *sym; | |
74ac6d43 | 11905 | |
4357ac6c TT |
11906 | for (child_die = die->child; |
11907 | child_die && child_die->tag; | |
11908 | child_die = sibling_die (child_die)) | |
11909 | ++n_entries; | |
11910 | ||
11911 | size = (sizeof (struct common_block) | |
11912 | + (n_entries - 1) * sizeof (struct symbol *)); | |
11913 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
11914 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
11915 | common_block->n_entries = 0; | |
11916 | ||
11917 | for (child_die = die->child; | |
11918 | child_die && child_die->tag; | |
11919 | child_die = sibling_die (child_die)) | |
11920 | { | |
11921 | /* Create the symbol in the DW_TAG_common_block block in the current | |
11922 | symbol scope. */ | |
e7c27a73 | 11923 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
11924 | if (sym != NULL) |
11925 | { | |
11926 | struct attribute *member_loc; | |
11927 | ||
11928 | common_block->contents[common_block->n_entries++] = sym; | |
11929 | ||
11930 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
11931 | cu); | |
11932 | if (member_loc) | |
11933 | { | |
11934 | /* GDB has handled this for a long time, but it is | |
11935 | not specified by DWARF. It seems to have been | |
11936 | emitted by gfortran at least as recently as: | |
11937 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
11938 | complaint (&symfile_complaints, | |
11939 | _("Variable in common block has " | |
11940 | "DW_AT_data_member_location " | |
11941 | "- DIE at 0x%x [in module %s]"), | |
11942 | child_die->offset.sect_off, cu->objfile->name); | |
11943 | ||
11944 | if (attr_form_is_section_offset (member_loc)) | |
11945 | dwarf2_complex_location_expr_complaint (); | |
11946 | else if (attr_form_is_constant (member_loc) | |
11947 | || attr_form_is_block (member_loc)) | |
11948 | { | |
11949 | if (attr) | |
11950 | mark_common_block_symbol_computed (sym, die, attr, | |
11951 | member_loc, cu); | |
11952 | } | |
11953 | else | |
11954 | dwarf2_complex_location_expr_complaint (); | |
11955 | } | |
11956 | } | |
c906108c | 11957 | } |
4357ac6c TT |
11958 | |
11959 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
11960 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
11961 | } |
11962 | } | |
11963 | ||
0114d602 | 11964 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 11965 | |
0114d602 DJ |
11966 | static struct type * |
11967 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 11968 | { |
e7c27a73 | 11969 | struct objfile *objfile = cu->objfile; |
0114d602 | 11970 | const char *previous_prefix, *name; |
9219021c | 11971 | int is_anonymous; |
0114d602 DJ |
11972 | struct type *type; |
11973 | ||
11974 | /* For extensions, reuse the type of the original namespace. */ | |
11975 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
11976 | { | |
11977 | struct die_info *ext_die; | |
11978 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 11979 | |
0114d602 DJ |
11980 | ext_die = dwarf2_extension (die, &ext_cu); |
11981 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
11982 | |
11983 | /* EXT_CU may not be the same as CU. | |
11984 | Ensure TYPE is recorded in CU's type_hash table. */ | |
0114d602 DJ |
11985 | return set_die_type (die, type, cu); |
11986 | } | |
9219021c | 11987 | |
e142c38c | 11988 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
11989 | |
11990 | /* Now build the name of the current namespace. */ | |
11991 | ||
0114d602 DJ |
11992 | previous_prefix = determine_prefix (die, cu); |
11993 | if (previous_prefix[0] != '\0') | |
11994 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 11995 | previous_prefix, name, 0, cu); |
0114d602 DJ |
11996 | |
11997 | /* Create the type. */ | |
11998 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
11999 | objfile); | |
12000 | TYPE_NAME (type) = (char *) name; | |
12001 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
12002 | ||
60531b24 | 12003 | return set_die_type (die, type, cu); |
0114d602 DJ |
12004 | } |
12005 | ||
12006 | /* Read a C++ namespace. */ | |
12007 | ||
12008 | static void | |
12009 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
12010 | { | |
12011 | struct objfile *objfile = cu->objfile; | |
0114d602 | 12012 | int is_anonymous; |
9219021c | 12013 | |
5c4e30ca DC |
12014 | /* Add a symbol associated to this if we haven't seen the namespace |
12015 | before. Also, add a using directive if it's an anonymous | |
12016 | namespace. */ | |
9219021c | 12017 | |
f2f0e013 | 12018 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
12019 | { |
12020 | struct type *type; | |
12021 | ||
0114d602 | 12022 | type = read_type_die (die, cu); |
e7c27a73 | 12023 | new_symbol (die, type, cu); |
5c4e30ca | 12024 | |
e8e80198 | 12025 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 12026 | if (is_anonymous) |
0114d602 DJ |
12027 | { |
12028 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 12029 | |
c0cc3a76 | 12030 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
32019081 | 12031 | NULL, NULL, &objfile->objfile_obstack); |
0114d602 | 12032 | } |
5c4e30ca | 12033 | } |
9219021c | 12034 | |
639d11d3 | 12035 | if (die->child != NULL) |
d9fa45fe | 12036 | { |
639d11d3 | 12037 | struct die_info *child_die = die->child; |
6e70227d | 12038 | |
d9fa45fe DC |
12039 | while (child_die && child_die->tag) |
12040 | { | |
e7c27a73 | 12041 | process_die (child_die, cu); |
d9fa45fe DC |
12042 | child_die = sibling_die (child_die); |
12043 | } | |
12044 | } | |
38d518c9 EZ |
12045 | } |
12046 | ||
f55ee35c JK |
12047 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
12048 | imported module. Still we need that type as local Fortran "use ... only" | |
12049 | declaration imports depend on the created type in determine_prefix. */ | |
12050 | ||
12051 | static struct type * | |
12052 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
12053 | { | |
12054 | struct objfile *objfile = cu->objfile; | |
12055 | char *module_name; | |
12056 | struct type *type; | |
12057 | ||
12058 | module_name = dwarf2_name (die, cu); | |
12059 | if (!module_name) | |
3e43a32a MS |
12060 | complaint (&symfile_complaints, |
12061 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 12062 | die->offset.sect_off); |
f55ee35c JK |
12063 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
12064 | ||
12065 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
12066 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
12067 | ||
12068 | return set_die_type (die, type, cu); | |
12069 | } | |
12070 | ||
5d7cb8df JK |
12071 | /* Read a Fortran module. */ |
12072 | ||
12073 | static void | |
12074 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
12075 | { | |
12076 | struct die_info *child_die = die->child; | |
12077 | ||
5d7cb8df JK |
12078 | while (child_die && child_die->tag) |
12079 | { | |
12080 | process_die (child_die, cu); | |
12081 | child_die = sibling_die (child_die); | |
12082 | } | |
12083 | } | |
12084 | ||
38d518c9 EZ |
12085 | /* Return the name of the namespace represented by DIE. Set |
12086 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
12087 | namespace. */ | |
12088 | ||
12089 | static const char * | |
e142c38c | 12090 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
12091 | { |
12092 | struct die_info *current_die; | |
12093 | const char *name = NULL; | |
12094 | ||
12095 | /* Loop through the extensions until we find a name. */ | |
12096 | ||
12097 | for (current_die = die; | |
12098 | current_die != NULL; | |
f2f0e013 | 12099 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 12100 | { |
e142c38c | 12101 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
12102 | if (name != NULL) |
12103 | break; | |
12104 | } | |
12105 | ||
12106 | /* Is it an anonymous namespace? */ | |
12107 | ||
12108 | *is_anonymous = (name == NULL); | |
12109 | if (*is_anonymous) | |
2b1dbab0 | 12110 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
12111 | |
12112 | return name; | |
d9fa45fe DC |
12113 | } |
12114 | ||
c906108c SS |
12115 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
12116 | the user defined type vector. */ | |
12117 | ||
f792889a | 12118 | static struct type * |
e7c27a73 | 12119 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12120 | { |
5e2b427d | 12121 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 12122 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 12123 | struct type *type; |
8b2dbe47 KB |
12124 | struct attribute *attr_byte_size; |
12125 | struct attribute *attr_address_class; | |
12126 | int byte_size, addr_class; | |
7e314c57 JK |
12127 | struct type *target_type; |
12128 | ||
12129 | target_type = die_type (die, cu); | |
c906108c | 12130 | |
7e314c57 JK |
12131 | /* The die_type call above may have already set the type for this DIE. */ |
12132 | type = get_die_type (die, cu); | |
12133 | if (type) | |
12134 | return type; | |
12135 | ||
12136 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 12137 | |
e142c38c | 12138 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
12139 | if (attr_byte_size) |
12140 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 12141 | else |
8b2dbe47 KB |
12142 | byte_size = cu_header->addr_size; |
12143 | ||
e142c38c | 12144 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
12145 | if (attr_address_class) |
12146 | addr_class = DW_UNSND (attr_address_class); | |
12147 | else | |
12148 | addr_class = DW_ADDR_none; | |
12149 | ||
12150 | /* If the pointer size or address class is different than the | |
12151 | default, create a type variant marked as such and set the | |
12152 | length accordingly. */ | |
12153 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 12154 | { |
5e2b427d | 12155 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
12156 | { |
12157 | int type_flags; | |
12158 | ||
849957d9 | 12159 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 12160 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
12161 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
12162 | == 0); | |
8b2dbe47 KB |
12163 | type = make_type_with_address_space (type, type_flags); |
12164 | } | |
12165 | else if (TYPE_LENGTH (type) != byte_size) | |
12166 | { | |
3e43a32a MS |
12167 | complaint (&symfile_complaints, |
12168 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 12169 | } |
6e70227d | 12170 | else |
9a619af0 MS |
12171 | { |
12172 | /* Should we also complain about unhandled address classes? */ | |
12173 | } | |
c906108c | 12174 | } |
8b2dbe47 KB |
12175 | |
12176 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 12177 | return set_die_type (die, type, cu); |
c906108c SS |
12178 | } |
12179 | ||
12180 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
12181 | the user defined type vector. */ | |
12182 | ||
f792889a | 12183 | static struct type * |
e7c27a73 | 12184 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
12185 | { |
12186 | struct type *type; | |
12187 | struct type *to_type; | |
12188 | struct type *domain; | |
12189 | ||
e7c27a73 DJ |
12190 | to_type = die_type (die, cu); |
12191 | domain = die_containing_type (die, cu); | |
0d5de010 | 12192 | |
7e314c57 JK |
12193 | /* The calls above may have already set the type for this DIE. */ |
12194 | type = get_die_type (die, cu); | |
12195 | if (type) | |
12196 | return type; | |
12197 | ||
0d5de010 DJ |
12198 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
12199 | type = lookup_methodptr_type (to_type); | |
12200 | else | |
12201 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 12202 | |
f792889a | 12203 | return set_die_type (die, type, cu); |
c906108c SS |
12204 | } |
12205 | ||
12206 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
12207 | the user defined type vector. */ | |
12208 | ||
f792889a | 12209 | static struct type * |
e7c27a73 | 12210 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12211 | { |
e7c27a73 | 12212 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 12213 | struct type *type, *target_type; |
c906108c SS |
12214 | struct attribute *attr; |
12215 | ||
7e314c57 JK |
12216 | target_type = die_type (die, cu); |
12217 | ||
12218 | /* The die_type call above may have already set the type for this DIE. */ | |
12219 | type = get_die_type (die, cu); | |
12220 | if (type) | |
12221 | return type; | |
12222 | ||
12223 | type = lookup_reference_type (target_type); | |
e142c38c | 12224 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12225 | if (attr) |
12226 | { | |
12227 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12228 | } | |
12229 | else | |
12230 | { | |
107d2387 | 12231 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 12232 | } |
f792889a | 12233 | return set_die_type (die, type, cu); |
c906108c SS |
12234 | } |
12235 | ||
f792889a | 12236 | static struct type * |
e7c27a73 | 12237 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12238 | { |
f792889a | 12239 | struct type *base_type, *cv_type; |
c906108c | 12240 | |
e7c27a73 | 12241 | base_type = die_type (die, cu); |
7e314c57 JK |
12242 | |
12243 | /* The die_type call above may have already set the type for this DIE. */ | |
12244 | cv_type = get_die_type (die, cu); | |
12245 | if (cv_type) | |
12246 | return cv_type; | |
12247 | ||
2f608a3a KW |
12248 | /* In case the const qualifier is applied to an array type, the element type |
12249 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
12250 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
12251 | { | |
12252 | struct type *el_type, *inner_array; | |
12253 | ||
12254 | base_type = copy_type (base_type); | |
12255 | inner_array = base_type; | |
12256 | ||
12257 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
12258 | { | |
12259 | TYPE_TARGET_TYPE (inner_array) = | |
12260 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
12261 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
12262 | } | |
12263 | ||
12264 | el_type = TYPE_TARGET_TYPE (inner_array); | |
12265 | TYPE_TARGET_TYPE (inner_array) = | |
12266 | make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL); | |
12267 | ||
12268 | return set_die_type (die, base_type, cu); | |
12269 | } | |
12270 | ||
f792889a DJ |
12271 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
12272 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12273 | } |
12274 | ||
f792889a | 12275 | static struct type * |
e7c27a73 | 12276 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12277 | { |
f792889a | 12278 | struct type *base_type, *cv_type; |
c906108c | 12279 | |
e7c27a73 | 12280 | base_type = die_type (die, cu); |
7e314c57 JK |
12281 | |
12282 | /* The die_type call above may have already set the type for this DIE. */ | |
12283 | cv_type = get_die_type (die, cu); | |
12284 | if (cv_type) | |
12285 | return cv_type; | |
12286 | ||
f792889a DJ |
12287 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
12288 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12289 | } |
12290 | ||
12291 | /* Extract all information from a DW_TAG_string_type DIE and add to | |
12292 | the user defined type vector. It isn't really a user defined type, | |
12293 | but it behaves like one, with other DIE's using an AT_user_def_type | |
12294 | attribute to reference it. */ | |
12295 | ||
f792889a | 12296 | static struct type * |
e7c27a73 | 12297 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12298 | { |
e7c27a73 | 12299 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 12300 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12301 | struct type *type, *range_type, *index_type, *char_type; |
12302 | struct attribute *attr; | |
12303 | unsigned int length; | |
12304 | ||
e142c38c | 12305 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
12306 | if (attr) |
12307 | { | |
12308 | length = DW_UNSND (attr); | |
12309 | } | |
12310 | else | |
12311 | { | |
0963b4bd | 12312 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 12313 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
12314 | if (attr) |
12315 | { | |
12316 | length = DW_UNSND (attr); | |
12317 | } | |
12318 | else | |
12319 | { | |
12320 | length = 1; | |
12321 | } | |
c906108c | 12322 | } |
6ccb9162 | 12323 | |
46bf5051 | 12324 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 12325 | range_type = create_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
12326 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
12327 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 12328 | |
f792889a | 12329 | return set_die_type (die, type, cu); |
c906108c SS |
12330 | } |
12331 | ||
12332 | /* Handle DIES due to C code like: | |
12333 | ||
12334 | struct foo | |
c5aa993b JM |
12335 | { |
12336 | int (*funcp)(int a, long l); | |
12337 | int b; | |
12338 | }; | |
c906108c | 12339 | |
0963b4bd | 12340 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 12341 | |
f792889a | 12342 | static struct type * |
e7c27a73 | 12343 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12344 | { |
bb5ed363 | 12345 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
12346 | struct type *type; /* Type that this function returns. */ |
12347 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
12348 | struct attribute *attr; |
12349 | ||
e7c27a73 | 12350 | type = die_type (die, cu); |
7e314c57 JK |
12351 | |
12352 | /* The die_type call above may have already set the type for this DIE. */ | |
12353 | ftype = get_die_type (die, cu); | |
12354 | if (ftype) | |
12355 | return ftype; | |
12356 | ||
0c8b41f1 | 12357 | ftype = lookup_function_type (type); |
c906108c | 12358 | |
5b8101ae | 12359 | /* All functions in C++, Pascal and Java have prototypes. */ |
e142c38c | 12360 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
c906108c | 12361 | if ((attr && (DW_UNSND (attr) != 0)) |
987504bb | 12362 | || cu->language == language_cplus |
5b8101ae PM |
12363 | || cu->language == language_java |
12364 | || cu->language == language_pascal) | |
876cecd0 | 12365 | TYPE_PROTOTYPED (ftype) = 1; |
a6c727b2 DJ |
12366 | else if (producer_is_realview (cu->producer)) |
12367 | /* RealView does not emit DW_AT_prototyped. We can not | |
12368 | distinguish prototyped and unprototyped functions; default to | |
12369 | prototyped, since that is more common in modern code (and | |
12370 | RealView warns about unprototyped functions). */ | |
12371 | TYPE_PROTOTYPED (ftype) = 1; | |
c906108c | 12372 | |
c055b101 CV |
12373 | /* Store the calling convention in the type if it's available in |
12374 | the subroutine die. Otherwise set the calling convention to | |
12375 | the default value DW_CC_normal. */ | |
12376 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
12377 | if (attr) |
12378 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
12379 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
12380 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
12381 | else | |
12382 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
12383 | |
12384 | /* We need to add the subroutine type to the die immediately so | |
12385 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 12386 | declared as the same subroutine type. */ |
76c10ea2 | 12387 | set_die_type (die, ftype, cu); |
6e70227d | 12388 | |
639d11d3 | 12389 | if (die->child != NULL) |
c906108c | 12390 | { |
bb5ed363 | 12391 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 12392 | struct die_info *child_die; |
8072405b | 12393 | int nparams, iparams; |
c906108c SS |
12394 | |
12395 | /* Count the number of parameters. | |
12396 | FIXME: GDB currently ignores vararg functions, but knows about | |
12397 | vararg member functions. */ | |
8072405b | 12398 | nparams = 0; |
639d11d3 | 12399 | child_die = die->child; |
c906108c SS |
12400 | while (child_die && child_die->tag) |
12401 | { | |
12402 | if (child_die->tag == DW_TAG_formal_parameter) | |
12403 | nparams++; | |
12404 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 12405 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
12406 | child_die = sibling_die (child_die); |
12407 | } | |
12408 | ||
12409 | /* Allocate storage for parameters and fill them in. */ | |
12410 | TYPE_NFIELDS (ftype) = nparams; | |
12411 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 12412 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 12413 | |
8072405b JK |
12414 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
12415 | even if we error out during the parameters reading below. */ | |
12416 | for (iparams = 0; iparams < nparams; iparams++) | |
12417 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
12418 | ||
12419 | iparams = 0; | |
639d11d3 | 12420 | child_die = die->child; |
c906108c SS |
12421 | while (child_die && child_die->tag) |
12422 | { | |
12423 | if (child_die->tag == DW_TAG_formal_parameter) | |
12424 | { | |
3ce3b1ba PA |
12425 | struct type *arg_type; |
12426 | ||
12427 | /* DWARF version 2 has no clean way to discern C++ | |
12428 | static and non-static member functions. G++ helps | |
12429 | GDB by marking the first parameter for non-static | |
12430 | member functions (which is the this pointer) as | |
12431 | artificial. We pass this information to | |
12432 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
12433 | ||
12434 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
12435 | 4.5 does not yet generate. */ | |
e142c38c | 12436 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
12437 | if (attr) |
12438 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
12439 | else | |
418835cc KS |
12440 | { |
12441 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
12442 | ||
12443 | /* GCC/43521: In java, the formal parameter | |
12444 | "this" is sometimes not marked with DW_AT_artificial. */ | |
12445 | if (cu->language == language_java) | |
12446 | { | |
12447 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 12448 | |
418835cc KS |
12449 | if (name && !strcmp (name, "this")) |
12450 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
12451 | } | |
12452 | } | |
3ce3b1ba PA |
12453 | arg_type = die_type (child_die, cu); |
12454 | ||
12455 | /* RealView does not mark THIS as const, which the testsuite | |
12456 | expects. GCC marks THIS as const in method definitions, | |
12457 | but not in the class specifications (GCC PR 43053). */ | |
12458 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
12459 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
12460 | { | |
12461 | int is_this = 0; | |
12462 | struct dwarf2_cu *arg_cu = cu; | |
12463 | const char *name = dwarf2_name (child_die, cu); | |
12464 | ||
12465 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
12466 | if (attr) | |
12467 | { | |
12468 | /* If the compiler emits this, use it. */ | |
12469 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
12470 | is_this = 1; | |
12471 | } | |
12472 | else if (name && strcmp (name, "this") == 0) | |
12473 | /* Function definitions will have the argument names. */ | |
12474 | is_this = 1; | |
12475 | else if (name == NULL && iparams == 0) | |
12476 | /* Declarations may not have the names, so like | |
12477 | elsewhere in GDB, assume an artificial first | |
12478 | argument is "this". */ | |
12479 | is_this = 1; | |
12480 | ||
12481 | if (is_this) | |
12482 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
12483 | arg_type, 0); | |
12484 | } | |
12485 | ||
12486 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
12487 | iparams++; |
12488 | } | |
12489 | child_die = sibling_die (child_die); | |
12490 | } | |
12491 | } | |
12492 | ||
76c10ea2 | 12493 | return ftype; |
c906108c SS |
12494 | } |
12495 | ||
f792889a | 12496 | static struct type * |
e7c27a73 | 12497 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12498 | { |
e7c27a73 | 12499 | struct objfile *objfile = cu->objfile; |
0114d602 | 12500 | const char *name = NULL; |
3c8e0968 | 12501 | struct type *this_type, *target_type; |
c906108c | 12502 | |
94af9270 | 12503 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 12504 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 DJ |
12505 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
12506 | TYPE_NAME (this_type) = (char *) name; | |
f792889a | 12507 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
12508 | target_type = die_type (die, cu); |
12509 | if (target_type != this_type) | |
12510 | TYPE_TARGET_TYPE (this_type) = target_type; | |
12511 | else | |
12512 | { | |
12513 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
12514 | spec and cause infinite loops in GDB. */ | |
12515 | complaint (&symfile_complaints, | |
12516 | _("Self-referential DW_TAG_typedef " | |
12517 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 12518 | die->offset.sect_off, objfile->name); |
3c8e0968 DE |
12519 | TYPE_TARGET_TYPE (this_type) = NULL; |
12520 | } | |
f792889a | 12521 | return this_type; |
c906108c SS |
12522 | } |
12523 | ||
12524 | /* Find a representation of a given base type and install | |
12525 | it in the TYPE field of the die. */ | |
12526 | ||
f792889a | 12527 | static struct type * |
e7c27a73 | 12528 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12529 | { |
e7c27a73 | 12530 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12531 | struct type *type; |
12532 | struct attribute *attr; | |
12533 | int encoding = 0, size = 0; | |
39cbfefa | 12534 | char *name; |
6ccb9162 UW |
12535 | enum type_code code = TYPE_CODE_INT; |
12536 | int type_flags = 0; | |
12537 | struct type *target_type = NULL; | |
c906108c | 12538 | |
e142c38c | 12539 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
12540 | if (attr) |
12541 | { | |
12542 | encoding = DW_UNSND (attr); | |
12543 | } | |
e142c38c | 12544 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12545 | if (attr) |
12546 | { | |
12547 | size = DW_UNSND (attr); | |
12548 | } | |
39cbfefa | 12549 | name = dwarf2_name (die, cu); |
6ccb9162 | 12550 | if (!name) |
c906108c | 12551 | { |
6ccb9162 UW |
12552 | complaint (&symfile_complaints, |
12553 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 12554 | } |
6ccb9162 UW |
12555 | |
12556 | switch (encoding) | |
c906108c | 12557 | { |
6ccb9162 UW |
12558 | case DW_ATE_address: |
12559 | /* Turn DW_ATE_address into a void * pointer. */ | |
12560 | code = TYPE_CODE_PTR; | |
12561 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12562 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
12563 | break; | |
12564 | case DW_ATE_boolean: | |
12565 | code = TYPE_CODE_BOOL; | |
12566 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12567 | break; | |
12568 | case DW_ATE_complex_float: | |
12569 | code = TYPE_CODE_COMPLEX; | |
12570 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
12571 | break; | |
12572 | case DW_ATE_decimal_float: | |
12573 | code = TYPE_CODE_DECFLOAT; | |
12574 | break; | |
12575 | case DW_ATE_float: | |
12576 | code = TYPE_CODE_FLT; | |
12577 | break; | |
12578 | case DW_ATE_signed: | |
12579 | break; | |
12580 | case DW_ATE_unsigned: | |
12581 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
12582 | if (cu->language == language_fortran |
12583 | && name | |
12584 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
12585 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
12586 | break; |
12587 | case DW_ATE_signed_char: | |
6e70227d | 12588 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12589 | || cu->language == language_pascal |
12590 | || cu->language == language_fortran) | |
6ccb9162 UW |
12591 | code = TYPE_CODE_CHAR; |
12592 | break; | |
12593 | case DW_ATE_unsigned_char: | |
868a0084 | 12594 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12595 | || cu->language == language_pascal |
12596 | || cu->language == language_fortran) | |
6ccb9162 UW |
12597 | code = TYPE_CODE_CHAR; |
12598 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12599 | break; | |
75079b2b TT |
12600 | case DW_ATE_UTF: |
12601 | /* We just treat this as an integer and then recognize the | |
12602 | type by name elsewhere. */ | |
12603 | break; | |
12604 | ||
6ccb9162 UW |
12605 | default: |
12606 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
12607 | dwarf_type_encoding_name (encoding)); | |
12608 | break; | |
c906108c | 12609 | } |
6ccb9162 | 12610 | |
0114d602 DJ |
12611 | type = init_type (code, size, type_flags, NULL, objfile); |
12612 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
12613 | TYPE_TARGET_TYPE (type) = target_type; |
12614 | ||
0114d602 | 12615 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 12616 | TYPE_NOSIGN (type) = 1; |
0114d602 | 12617 | |
f792889a | 12618 | return set_die_type (die, type, cu); |
c906108c SS |
12619 | } |
12620 | ||
a02abb62 JB |
12621 | /* Read the given DW_AT_subrange DIE. */ |
12622 | ||
f792889a | 12623 | static struct type * |
a02abb62 JB |
12624 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
12625 | { | |
12626 | struct type *base_type; | |
12627 | struct type *range_type; | |
12628 | struct attribute *attr; | |
4fae6e18 JK |
12629 | LONGEST low, high; |
12630 | int low_default_is_valid; | |
39cbfefa | 12631 | char *name; |
43bbcdc2 | 12632 | LONGEST negative_mask; |
e77813c8 | 12633 | |
a02abb62 | 12634 | base_type = die_type (die, cu); |
953ac07e JK |
12635 | /* Preserve BASE_TYPE's original type, just set its LENGTH. */ |
12636 | check_typedef (base_type); | |
a02abb62 | 12637 | |
7e314c57 JK |
12638 | /* The die_type call above may have already set the type for this DIE. */ |
12639 | range_type = get_die_type (die, cu); | |
12640 | if (range_type) | |
12641 | return range_type; | |
12642 | ||
4fae6e18 JK |
12643 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
12644 | omitting DW_AT_lower_bound. */ | |
12645 | switch (cu->language) | |
6e70227d | 12646 | { |
4fae6e18 JK |
12647 | case language_c: |
12648 | case language_cplus: | |
12649 | low = 0; | |
12650 | low_default_is_valid = 1; | |
12651 | break; | |
12652 | case language_fortran: | |
12653 | low = 1; | |
12654 | low_default_is_valid = 1; | |
12655 | break; | |
12656 | case language_d: | |
12657 | case language_java: | |
12658 | case language_objc: | |
12659 | low = 0; | |
12660 | low_default_is_valid = (cu->header.version >= 4); | |
12661 | break; | |
12662 | case language_ada: | |
12663 | case language_m2: | |
12664 | case language_pascal: | |
a02abb62 | 12665 | low = 1; |
4fae6e18 JK |
12666 | low_default_is_valid = (cu->header.version >= 4); |
12667 | break; | |
12668 | default: | |
12669 | low = 0; | |
12670 | low_default_is_valid = 0; | |
12671 | break; | |
a02abb62 JB |
12672 | } |
12673 | ||
dd5e6932 DJ |
12674 | /* FIXME: For variable sized arrays either of these could be |
12675 | a variable rather than a constant value. We'll allow it, | |
12676 | but we don't know how to handle it. */ | |
e142c38c | 12677 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 12678 | if (attr) |
4fae6e18 JK |
12679 | low = dwarf2_get_attr_constant_value (attr, low); |
12680 | else if (!low_default_is_valid) | |
12681 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
12682 | "- DIE at 0x%x [in module %s]"), | |
12683 | die->offset.sect_off, cu->objfile->name); | |
a02abb62 | 12684 | |
e142c38c | 12685 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
a02abb62 | 12686 | if (attr) |
6e70227d | 12687 | { |
d48323d8 | 12688 | if (attr_form_is_block (attr) || is_ref_attr (attr)) |
a02abb62 JB |
12689 | { |
12690 | /* GCC encodes arrays with unspecified or dynamic length | |
e77813c8 | 12691 | with a DW_FORM_block1 attribute or a reference attribute. |
a02abb62 JB |
12692 | FIXME: GDB does not yet know how to handle dynamic |
12693 | arrays properly, treat them as arrays with unspecified | |
12694 | length for now. | |
12695 | ||
12696 | FIXME: jimb/2003-09-22: GDB does not really know | |
12697 | how to handle arrays of unspecified length | |
12698 | either; we just represent them as zero-length | |
12699 | arrays. Choose an appropriate upper bound given | |
12700 | the lower bound we've computed above. */ | |
12701 | high = low - 1; | |
12702 | } | |
12703 | else | |
12704 | high = dwarf2_get_attr_constant_value (attr, 1); | |
12705 | } | |
e77813c8 PM |
12706 | else |
12707 | { | |
12708 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
12709 | if (attr) | |
12710 | { | |
12711 | int count = dwarf2_get_attr_constant_value (attr, 1); | |
12712 | high = low + count - 1; | |
12713 | } | |
c2ff108b JK |
12714 | else |
12715 | { | |
12716 | /* Unspecified array length. */ | |
12717 | high = low - 1; | |
12718 | } | |
e77813c8 PM |
12719 | } |
12720 | ||
12721 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
12722 | without specifying a base type. | |
12723 | In that case, the base type must be set to the type of | |
12724 | the lower bound, upper bound or count, in that order, if any of these | |
12725 | three attributes references an object that has a type. | |
12726 | If no base type is found, the Dwarf-2 specifications say that | |
12727 | a signed integer type of size equal to the size of an address should | |
12728 | be used. | |
12729 | For the following C code: `extern char gdb_int [];' | |
12730 | GCC produces an empty range DIE. | |
12731 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 12732 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
12733 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
12734 | { | |
12735 | struct objfile *objfile = cu->objfile; | |
12736 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12737 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
12738 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
12739 | ||
12740 | /* Test "int", "long int", and "long long int" objfile types, | |
12741 | and select the first one having a size above or equal to the | |
12742 | architecture address size. */ | |
12743 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
12744 | base_type = int_type; | |
12745 | else | |
12746 | { | |
12747 | int_type = objfile_type (objfile)->builtin_long; | |
12748 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
12749 | base_type = int_type; | |
12750 | else | |
12751 | { | |
12752 | int_type = objfile_type (objfile)->builtin_long_long; | |
12753 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
12754 | base_type = int_type; | |
12755 | } | |
12756 | } | |
12757 | } | |
a02abb62 | 12758 | |
6e70227d | 12759 | negative_mask = |
43bbcdc2 PH |
12760 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
12761 | if (!TYPE_UNSIGNED (base_type) && (low & negative_mask)) | |
12762 | low |= negative_mask; | |
12763 | if (!TYPE_UNSIGNED (base_type) && (high & negative_mask)) | |
12764 | high |= negative_mask; | |
12765 | ||
a02abb62 JB |
12766 | range_type = create_range_type (NULL, base_type, low, high); |
12767 | ||
bbb0eef6 JK |
12768 | /* Mark arrays with dynamic length at least as an array of unspecified |
12769 | length. GDB could check the boundary but before it gets implemented at | |
12770 | least allow accessing the array elements. */ | |
d48323d8 | 12771 | if (attr && attr_form_is_block (attr)) |
bbb0eef6 JK |
12772 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; |
12773 | ||
c2ff108b JK |
12774 | /* Ada expects an empty array on no boundary attributes. */ |
12775 | if (attr == NULL && cu->language != language_ada) | |
12776 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; | |
12777 | ||
39cbfefa DJ |
12778 | name = dwarf2_name (die, cu); |
12779 | if (name) | |
12780 | TYPE_NAME (range_type) = name; | |
6e70227d | 12781 | |
e142c38c | 12782 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
12783 | if (attr) |
12784 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
12785 | ||
7e314c57 JK |
12786 | set_die_type (die, range_type, cu); |
12787 | ||
12788 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
12789 | set_descriptive_type (range_type, die, cu); |
12790 | ||
7e314c57 | 12791 | return range_type; |
a02abb62 | 12792 | } |
6e70227d | 12793 | |
f792889a | 12794 | static struct type * |
81a17f79 JB |
12795 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
12796 | { | |
12797 | struct type *type; | |
81a17f79 | 12798 | |
81a17f79 JB |
12799 | /* For now, we only support the C meaning of an unspecified type: void. */ |
12800 | ||
0114d602 DJ |
12801 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
12802 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 12803 | |
f792889a | 12804 | return set_die_type (die, type, cu); |
81a17f79 | 12805 | } |
a02abb62 | 12806 | |
639d11d3 DC |
12807 | /* Read a single die and all its descendents. Set the die's sibling |
12808 | field to NULL; set other fields in the die correctly, and set all | |
12809 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
12810 | location of the info_ptr after reading all of those dies. PARENT | |
12811 | is the parent of the die in question. */ | |
12812 | ||
12813 | static struct die_info * | |
dee91e82 DE |
12814 | read_die_and_children (const struct die_reader_specs *reader, |
12815 | gdb_byte *info_ptr, | |
12816 | gdb_byte **new_info_ptr, | |
12817 | struct die_info *parent) | |
639d11d3 DC |
12818 | { |
12819 | struct die_info *die; | |
fe1b8b76 | 12820 | gdb_byte *cur_ptr; |
639d11d3 DC |
12821 | int has_children; |
12822 | ||
93311388 | 12823 | cur_ptr = read_full_die (reader, &die, info_ptr, &has_children); |
1d325ec1 DJ |
12824 | if (die == NULL) |
12825 | { | |
12826 | *new_info_ptr = cur_ptr; | |
12827 | return NULL; | |
12828 | } | |
93311388 | 12829 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
12830 | |
12831 | if (has_children) | |
348e048f | 12832 | die->child = read_die_and_siblings (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
12833 | else |
12834 | { | |
12835 | die->child = NULL; | |
12836 | *new_info_ptr = cur_ptr; | |
12837 | } | |
12838 | ||
12839 | die->sibling = NULL; | |
12840 | die->parent = parent; | |
12841 | return die; | |
12842 | } | |
12843 | ||
12844 | /* Read a die, all of its descendents, and all of its siblings; set | |
12845 | all of the fields of all of the dies correctly. Arguments are as | |
12846 | in read_die_and_children. */ | |
12847 | ||
12848 | static struct die_info * | |
93311388 DE |
12849 | read_die_and_siblings (const struct die_reader_specs *reader, |
12850 | gdb_byte *info_ptr, | |
fe1b8b76 | 12851 | gdb_byte **new_info_ptr, |
639d11d3 DC |
12852 | struct die_info *parent) |
12853 | { | |
12854 | struct die_info *first_die, *last_sibling; | |
fe1b8b76 | 12855 | gdb_byte *cur_ptr; |
639d11d3 | 12856 | |
c906108c | 12857 | cur_ptr = info_ptr; |
639d11d3 DC |
12858 | first_die = last_sibling = NULL; |
12859 | ||
12860 | while (1) | |
c906108c | 12861 | { |
639d11d3 | 12862 | struct die_info *die |
dee91e82 | 12863 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 12864 | |
1d325ec1 | 12865 | if (die == NULL) |
c906108c | 12866 | { |
639d11d3 DC |
12867 | *new_info_ptr = cur_ptr; |
12868 | return first_die; | |
c906108c | 12869 | } |
1d325ec1 DJ |
12870 | |
12871 | if (!first_die) | |
12872 | first_die = die; | |
c906108c | 12873 | else |
1d325ec1 DJ |
12874 | last_sibling->sibling = die; |
12875 | ||
12876 | last_sibling = die; | |
c906108c | 12877 | } |
c906108c SS |
12878 | } |
12879 | ||
3019eac3 DE |
12880 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
12881 | attributes. | |
12882 | The caller is responsible for filling in the extra attributes | |
12883 | and updating (*DIEP)->num_attrs. | |
12884 | Set DIEP to point to a newly allocated die with its information, | |
12885 | except for its child, sibling, and parent fields. | |
12886 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 DE |
12887 | |
12888 | static gdb_byte * | |
3019eac3 DE |
12889 | read_full_die_1 (const struct die_reader_specs *reader, |
12890 | struct die_info **diep, gdb_byte *info_ptr, | |
12891 | int *has_children, int num_extra_attrs) | |
93311388 | 12892 | { |
b64f50a1 JK |
12893 | unsigned int abbrev_number, bytes_read, i; |
12894 | sect_offset offset; | |
93311388 DE |
12895 | struct abbrev_info *abbrev; |
12896 | struct die_info *die; | |
12897 | struct dwarf2_cu *cu = reader->cu; | |
12898 | bfd *abfd = reader->abfd; | |
12899 | ||
b64f50a1 | 12900 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
12901 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
12902 | info_ptr += bytes_read; | |
12903 | if (!abbrev_number) | |
12904 | { | |
12905 | *diep = NULL; | |
12906 | *has_children = 0; | |
12907 | return info_ptr; | |
12908 | } | |
12909 | ||
433df2d4 | 12910 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 12911 | if (!abbrev) |
348e048f DE |
12912 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
12913 | abbrev_number, | |
12914 | bfd_get_filename (abfd)); | |
12915 | ||
3019eac3 | 12916 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
12917 | die->offset = offset; |
12918 | die->tag = abbrev->tag; | |
12919 | die->abbrev = abbrev_number; | |
12920 | ||
3019eac3 DE |
12921 | /* Make the result usable. |
12922 | The caller needs to update num_attrs after adding the extra | |
12923 | attributes. */ | |
93311388 DE |
12924 | die->num_attrs = abbrev->num_attrs; |
12925 | ||
12926 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
12927 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
12928 | info_ptr); | |
93311388 DE |
12929 | |
12930 | *diep = die; | |
12931 | *has_children = abbrev->has_children; | |
12932 | return info_ptr; | |
12933 | } | |
12934 | ||
3019eac3 DE |
12935 | /* Read a die and all its attributes. |
12936 | Set DIEP to point to a newly allocated die with its information, | |
12937 | except for its child, sibling, and parent fields. | |
12938 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
12939 | ||
12940 | static gdb_byte * | |
12941 | read_full_die (const struct die_reader_specs *reader, | |
12942 | struct die_info **diep, gdb_byte *info_ptr, | |
12943 | int *has_children) | |
12944 | { | |
12945 | return read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
12946 | } | |
433df2d4 DE |
12947 | \f |
12948 | /* Abbreviation tables. | |
3019eac3 | 12949 | |
433df2d4 | 12950 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
12951 | stored in a separate .debug_abbrev section. Before we read any |
12952 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
12953 | in a hash table. */ |
12954 | ||
12955 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
12956 | ||
12957 | static struct abbrev_info * | |
12958 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
12959 | { | |
12960 | struct abbrev_info *abbrev; | |
12961 | ||
12962 | abbrev = (struct abbrev_info *) | |
12963 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
12964 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
12965 | return abbrev; | |
12966 | } | |
12967 | ||
12968 | /* Add an abbreviation to the table. */ | |
c906108c SS |
12969 | |
12970 | static void | |
433df2d4 DE |
12971 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
12972 | unsigned int abbrev_number, | |
12973 | struct abbrev_info *abbrev) | |
12974 | { | |
12975 | unsigned int hash_number; | |
12976 | ||
12977 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
12978 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
12979 | abbrev_table->abbrevs[hash_number] = abbrev; | |
12980 | } | |
dee91e82 | 12981 | |
433df2d4 DE |
12982 | /* Look up an abbrev in the table. |
12983 | Returns NULL if the abbrev is not found. */ | |
12984 | ||
12985 | static struct abbrev_info * | |
12986 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
12987 | unsigned int abbrev_number) | |
c906108c | 12988 | { |
433df2d4 DE |
12989 | unsigned int hash_number; |
12990 | struct abbrev_info *abbrev; | |
12991 | ||
12992 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
12993 | abbrev = abbrev_table->abbrevs[hash_number]; | |
12994 | ||
12995 | while (abbrev) | |
12996 | { | |
12997 | if (abbrev->number == abbrev_number) | |
12998 | return abbrev; | |
12999 | abbrev = abbrev->next; | |
13000 | } | |
13001 | return NULL; | |
13002 | } | |
13003 | ||
13004 | /* Read in an abbrev table. */ | |
13005 | ||
13006 | static struct abbrev_table * | |
13007 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
13008 | sect_offset offset) | |
13009 | { | |
13010 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13011 | bfd *abfd = section->asection->owner; | |
13012 | struct abbrev_table *abbrev_table; | |
fe1b8b76 | 13013 | gdb_byte *abbrev_ptr; |
c906108c SS |
13014 | struct abbrev_info *cur_abbrev; |
13015 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 13016 | unsigned int abbrev_form; |
f3dd6933 DJ |
13017 | struct attr_abbrev *cur_attrs; |
13018 | unsigned int allocated_attrs; | |
c906108c | 13019 | |
433df2d4 | 13020 | abbrev_table = XMALLOC (struct abbrev_table); |
f4dc4d17 | 13021 | abbrev_table->offset = offset; |
433df2d4 DE |
13022 | obstack_init (&abbrev_table->abbrev_obstack); |
13023 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
13024 | (ABBREV_HASH_SIZE | |
13025 | * sizeof (struct abbrev_info *))); | |
13026 | memset (abbrev_table->abbrevs, 0, | |
13027 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 13028 | |
433df2d4 DE |
13029 | dwarf2_read_section (objfile, section); |
13030 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
13031 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13032 | abbrev_ptr += bytes_read; | |
13033 | ||
f3dd6933 DJ |
13034 | allocated_attrs = ATTR_ALLOC_CHUNK; |
13035 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 13036 | |
0963b4bd | 13037 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
13038 | while (abbrev_number) |
13039 | { | |
433df2d4 | 13040 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
13041 | |
13042 | /* read in abbrev header */ | |
13043 | cur_abbrev->number = abbrev_number; | |
13044 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13045 | abbrev_ptr += bytes_read; | |
13046 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
13047 | abbrev_ptr += 1; | |
13048 | ||
13049 | /* now read in declarations */ | |
13050 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13051 | abbrev_ptr += bytes_read; | |
13052 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13053 | abbrev_ptr += bytes_read; | |
13054 | while (abbrev_name) | |
13055 | { | |
f3dd6933 | 13056 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 13057 | { |
f3dd6933 DJ |
13058 | allocated_attrs += ATTR_ALLOC_CHUNK; |
13059 | cur_attrs | |
13060 | = xrealloc (cur_attrs, (allocated_attrs | |
13061 | * sizeof (struct attr_abbrev))); | |
c906108c | 13062 | } |
ae038cb0 | 13063 | |
f3dd6933 DJ |
13064 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
13065 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
13066 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13067 | abbrev_ptr += bytes_read; | |
13068 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13069 | abbrev_ptr += bytes_read; | |
13070 | } | |
13071 | ||
433df2d4 | 13072 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
13073 | (cur_abbrev->num_attrs |
13074 | * sizeof (struct attr_abbrev))); | |
13075 | memcpy (cur_abbrev->attrs, cur_attrs, | |
13076 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
13077 | ||
433df2d4 | 13078 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
13079 | |
13080 | /* Get next abbreviation. | |
13081 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
13082 | always properly terminated with an abbrev number of 0. |
13083 | Exit loop if we encounter an abbreviation which we have | |
13084 | already read (which means we are about to read the abbreviations | |
13085 | for the next compile unit) or if the end of the abbreviation | |
13086 | table is reached. */ | |
433df2d4 | 13087 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
13088 | break; |
13089 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13090 | abbrev_ptr += bytes_read; | |
433df2d4 | 13091 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
13092 | break; |
13093 | } | |
f3dd6933 DJ |
13094 | |
13095 | xfree (cur_attrs); | |
433df2d4 | 13096 | return abbrev_table; |
c906108c SS |
13097 | } |
13098 | ||
433df2d4 | 13099 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 13100 | |
c906108c | 13101 | static void |
433df2d4 | 13102 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 13103 | { |
433df2d4 DE |
13104 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
13105 | xfree (abbrev_table); | |
c906108c SS |
13106 | } |
13107 | ||
f4dc4d17 DE |
13108 | /* Same as abbrev_table_free but as a cleanup. |
13109 | We pass in a pointer to the pointer to the table so that we can | |
13110 | set the pointer to NULL when we're done. It also simplifies | |
13111 | build_type_unit_groups. */ | |
13112 | ||
13113 | static void | |
13114 | abbrev_table_free_cleanup (void *table_ptr) | |
13115 | { | |
13116 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
13117 | ||
13118 | if (*abbrev_table_ptr != NULL) | |
13119 | abbrev_table_free (*abbrev_table_ptr); | |
13120 | *abbrev_table_ptr = NULL; | |
13121 | } | |
13122 | ||
433df2d4 DE |
13123 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
13124 | ||
13125 | static void | |
13126 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
13127 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 13128 | { |
433df2d4 DE |
13129 | cu->abbrev_table = |
13130 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
13131 | } | |
c906108c | 13132 | |
433df2d4 | 13133 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 13134 | |
433df2d4 DE |
13135 | static void |
13136 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
13137 | { | |
13138 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 13139 | |
433df2d4 DE |
13140 | abbrev_table_free (cu->abbrev_table); |
13141 | /* Set this to NULL so that we SEGV if we try to read it later, | |
13142 | and also because free_comp_unit verifies this is NULL. */ | |
13143 | cu->abbrev_table = NULL; | |
13144 | } | |
13145 | \f | |
72bf9492 DJ |
13146 | /* Returns nonzero if TAG represents a type that we might generate a partial |
13147 | symbol for. */ | |
13148 | ||
13149 | static int | |
13150 | is_type_tag_for_partial (int tag) | |
13151 | { | |
13152 | switch (tag) | |
13153 | { | |
13154 | #if 0 | |
13155 | /* Some types that would be reasonable to generate partial symbols for, | |
13156 | that we don't at present. */ | |
13157 | case DW_TAG_array_type: | |
13158 | case DW_TAG_file_type: | |
13159 | case DW_TAG_ptr_to_member_type: | |
13160 | case DW_TAG_set_type: | |
13161 | case DW_TAG_string_type: | |
13162 | case DW_TAG_subroutine_type: | |
13163 | #endif | |
13164 | case DW_TAG_base_type: | |
13165 | case DW_TAG_class_type: | |
680b30c7 | 13166 | case DW_TAG_interface_type: |
72bf9492 DJ |
13167 | case DW_TAG_enumeration_type: |
13168 | case DW_TAG_structure_type: | |
13169 | case DW_TAG_subrange_type: | |
13170 | case DW_TAG_typedef: | |
13171 | case DW_TAG_union_type: | |
13172 | return 1; | |
13173 | default: | |
13174 | return 0; | |
13175 | } | |
13176 | } | |
13177 | ||
13178 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
13179 | ||
13180 | static struct partial_die_info * | |
dee91e82 DE |
13181 | load_partial_dies (const struct die_reader_specs *reader, |
13182 | gdb_byte *info_ptr, int building_psymtab) | |
72bf9492 | 13183 | { |
dee91e82 | 13184 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13185 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
13186 | struct partial_die_info *part_die; |
13187 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
13188 | struct abbrev_info *abbrev; | |
13189 | unsigned int bytes_read; | |
5afb4e99 | 13190 | unsigned int load_all = 0; |
72bf9492 DJ |
13191 | int nesting_level = 1; |
13192 | ||
13193 | parent_die = NULL; | |
13194 | last_die = NULL; | |
13195 | ||
7adf1e79 DE |
13196 | gdb_assert (cu->per_cu != NULL); |
13197 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
13198 | load_all = 1; |
13199 | ||
72bf9492 DJ |
13200 | cu->partial_dies |
13201 | = htab_create_alloc_ex (cu->header.length / 12, | |
13202 | partial_die_hash, | |
13203 | partial_die_eq, | |
13204 | NULL, | |
13205 | &cu->comp_unit_obstack, | |
13206 | hashtab_obstack_allocate, | |
13207 | dummy_obstack_deallocate); | |
13208 | ||
13209 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13210 | sizeof (struct partial_die_info)); | |
13211 | ||
13212 | while (1) | |
13213 | { | |
13214 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
13215 | ||
13216 | /* A NULL abbrev means the end of a series of children. */ | |
13217 | if (abbrev == NULL) | |
13218 | { | |
13219 | if (--nesting_level == 0) | |
13220 | { | |
13221 | /* PART_DIE was probably the last thing allocated on the | |
13222 | comp_unit_obstack, so we could call obstack_free | |
13223 | here. We don't do that because the waste is small, | |
13224 | and will be cleaned up when we're done with this | |
13225 | compilation unit. This way, we're also more robust | |
13226 | against other users of the comp_unit_obstack. */ | |
13227 | return first_die; | |
13228 | } | |
13229 | info_ptr += bytes_read; | |
13230 | last_die = parent_die; | |
13231 | parent_die = parent_die->die_parent; | |
13232 | continue; | |
13233 | } | |
13234 | ||
98bfdba5 PA |
13235 | /* Check for template arguments. We never save these; if |
13236 | they're seen, we just mark the parent, and go on our way. */ | |
13237 | if (parent_die != NULL | |
13238 | && cu->language == language_cplus | |
13239 | && (abbrev->tag == DW_TAG_template_type_param | |
13240 | || abbrev->tag == DW_TAG_template_value_param)) | |
13241 | { | |
13242 | parent_die->has_template_arguments = 1; | |
13243 | ||
13244 | if (!load_all) | |
13245 | { | |
13246 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 13247 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13248 | continue; |
13249 | } | |
13250 | } | |
13251 | ||
0d99eb77 | 13252 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
13253 | Skip their other children. */ |
13254 | if (!load_all | |
13255 | && cu->language == language_cplus | |
13256 | && parent_die != NULL | |
13257 | && parent_die->tag == DW_TAG_subprogram) | |
13258 | { | |
dee91e82 | 13259 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13260 | continue; |
13261 | } | |
13262 | ||
5afb4e99 DJ |
13263 | /* Check whether this DIE is interesting enough to save. Normally |
13264 | we would not be interested in members here, but there may be | |
13265 | later variables referencing them via DW_AT_specification (for | |
13266 | static members). */ | |
13267 | if (!load_all | |
13268 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 13269 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
13270 | && abbrev->tag != DW_TAG_enumerator |
13271 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 13272 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 13273 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 13274 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 13275 | && abbrev->tag != DW_TAG_module |
95554aad TT |
13276 | && abbrev->tag != DW_TAG_member |
13277 | && abbrev->tag != DW_TAG_imported_unit) | |
72bf9492 DJ |
13278 | { |
13279 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13280 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
13281 | continue; |
13282 | } | |
13283 | ||
dee91e82 DE |
13284 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
13285 | info_ptr); | |
72bf9492 DJ |
13286 | |
13287 | /* This two-pass algorithm for processing partial symbols has a | |
13288 | high cost in cache pressure. Thus, handle some simple cases | |
13289 | here which cover the majority of C partial symbols. DIEs | |
13290 | which neither have specification tags in them, nor could have | |
13291 | specification tags elsewhere pointing at them, can simply be | |
13292 | processed and discarded. | |
13293 | ||
13294 | This segment is also optional; scan_partial_symbols and | |
13295 | add_partial_symbol will handle these DIEs if we chain | |
13296 | them in normally. When compilers which do not emit large | |
13297 | quantities of duplicate debug information are more common, | |
13298 | this code can probably be removed. */ | |
13299 | ||
13300 | /* Any complete simple types at the top level (pretty much all | |
13301 | of them, for a language without namespaces), can be processed | |
13302 | directly. */ | |
13303 | if (parent_die == NULL | |
13304 | && part_die->has_specification == 0 | |
13305 | && part_die->is_declaration == 0 | |
d8228535 | 13306 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
13307 | || part_die->tag == DW_TAG_base_type |
13308 | || part_die->tag == DW_TAG_subrange_type)) | |
13309 | { | |
13310 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 13311 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13312 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
13313 | &objfile->static_psymbols, |
13314 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 13315 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13316 | continue; |
13317 | } | |
13318 | ||
d8228535 JK |
13319 | /* The exception for DW_TAG_typedef with has_children above is |
13320 | a workaround of GCC PR debug/47510. In the case of this complaint | |
13321 | type_name_no_tag_or_error will error on such types later. | |
13322 | ||
13323 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
13324 | it could not find the child DIEs referenced later, this is checked | |
13325 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
13326 | ||
13327 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
13328 | complaint (&symfile_complaints, | |
13329 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
13330 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 13331 | part_die->offset.sect_off, objfile->name); |
d8228535 | 13332 | |
72bf9492 DJ |
13333 | /* If we're at the second level, and we're an enumerator, and |
13334 | our parent has no specification (meaning possibly lives in a | |
13335 | namespace elsewhere), then we can add the partial symbol now | |
13336 | instead of queueing it. */ | |
13337 | if (part_die->tag == DW_TAG_enumerator | |
13338 | && parent_die != NULL | |
13339 | && parent_die->die_parent == NULL | |
13340 | && parent_die->tag == DW_TAG_enumeration_type | |
13341 | && parent_die->has_specification == 0) | |
13342 | { | |
13343 | if (part_die->name == NULL) | |
3e43a32a MS |
13344 | complaint (&symfile_complaints, |
13345 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 13346 | else if (building_psymtab) |
04a679b8 | 13347 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13348 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
13349 | (cu->language == language_cplus |
13350 | || cu->language == language_java) | |
bb5ed363 DE |
13351 | ? &objfile->global_psymbols |
13352 | : &objfile->static_psymbols, | |
13353 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 13354 | |
dee91e82 | 13355 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13356 | continue; |
13357 | } | |
13358 | ||
13359 | /* We'll save this DIE so link it in. */ | |
13360 | part_die->die_parent = parent_die; | |
13361 | part_die->die_sibling = NULL; | |
13362 | part_die->die_child = NULL; | |
13363 | ||
13364 | if (last_die && last_die == parent_die) | |
13365 | last_die->die_child = part_die; | |
13366 | else if (last_die) | |
13367 | last_die->die_sibling = part_die; | |
13368 | ||
13369 | last_die = part_die; | |
13370 | ||
13371 | if (first_die == NULL) | |
13372 | first_die = part_die; | |
13373 | ||
13374 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
13375 | find interesting need to be in the hash table, because we | |
13376 | also have the parent/sibling/child chains; only those that we | |
13377 | might refer to by offset later during partial symbol reading. | |
13378 | ||
13379 | For now this means things that might have be the target of a | |
13380 | DW_AT_specification, DW_AT_abstract_origin, or | |
13381 | DW_AT_extension. DW_AT_extension will refer only to | |
13382 | namespaces; DW_AT_abstract_origin refers to functions (and | |
13383 | many things under the function DIE, but we do not recurse | |
13384 | into function DIEs during partial symbol reading) and | |
13385 | possibly variables as well; DW_AT_specification refers to | |
13386 | declarations. Declarations ought to have the DW_AT_declaration | |
13387 | flag. It happens that GCC forgets to put it in sometimes, but | |
13388 | only for functions, not for types. | |
13389 | ||
13390 | Adding more things than necessary to the hash table is harmless | |
13391 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
13392 | wasted time in find_partial_die, when we reread the compilation |
13393 | unit with load_all_dies set. */ | |
72bf9492 | 13394 | |
5afb4e99 | 13395 | if (load_all |
72929c62 | 13396 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 13397 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
13398 | || abbrev->tag == DW_TAG_variable |
13399 | || abbrev->tag == DW_TAG_namespace | |
13400 | || part_die->is_declaration) | |
13401 | { | |
13402 | void **slot; | |
13403 | ||
13404 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 13405 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
13406 | *slot = part_die; |
13407 | } | |
13408 | ||
13409 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13410 | sizeof (struct partial_die_info)); | |
13411 | ||
13412 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 13413 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
13414 | languages we have to, so that we can get at method physnames |
13415 | to infer fully qualified class names, for DW_AT_specification, | |
13416 | and for C++ template arguments. For C++, we also look one level | |
13417 | inside functions to find template arguments (if the name of the | |
13418 | function does not already contain the template arguments). | |
bc30ff58 JB |
13419 | |
13420 | For Ada, we need to scan the children of subprograms and lexical | |
13421 | blocks as well because Ada allows the definition of nested | |
13422 | entities that could be interesting for the debugger, such as | |
13423 | nested subprograms for instance. */ | |
72bf9492 | 13424 | if (last_die->has_children |
5afb4e99 DJ |
13425 | && (load_all |
13426 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 13427 | || last_die->tag == DW_TAG_module |
72bf9492 | 13428 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
13429 | || (cu->language == language_cplus |
13430 | && last_die->tag == DW_TAG_subprogram | |
13431 | && (last_die->name == NULL | |
13432 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
13433 | || (cu->language != language_c |
13434 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 13435 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 13436 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
13437 | || last_die->tag == DW_TAG_union_type)) |
13438 | || (cu->language == language_ada | |
13439 | && (last_die->tag == DW_TAG_subprogram | |
13440 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
13441 | { |
13442 | nesting_level++; | |
13443 | parent_die = last_die; | |
13444 | continue; | |
13445 | } | |
13446 | ||
13447 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13448 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
13449 | |
13450 | /* Back to the top, do it again. */ | |
13451 | } | |
13452 | } | |
13453 | ||
c906108c SS |
13454 | /* Read a minimal amount of information into the minimal die structure. */ |
13455 | ||
fe1b8b76 | 13456 | static gdb_byte * |
dee91e82 DE |
13457 | read_partial_die (const struct die_reader_specs *reader, |
13458 | struct partial_die_info *part_die, | |
13459 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
13460 | gdb_byte *info_ptr) | |
c906108c | 13461 | { |
dee91e82 | 13462 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13463 | struct objfile *objfile = cu->objfile; |
dee91e82 | 13464 | gdb_byte *buffer = reader->buffer; |
fa238c03 | 13465 | unsigned int i; |
c906108c | 13466 | struct attribute attr; |
c5aa993b | 13467 | int has_low_pc_attr = 0; |
c906108c | 13468 | int has_high_pc_attr = 0; |
91da1414 | 13469 | int high_pc_relative = 0; |
c906108c | 13470 | |
72bf9492 | 13471 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 13472 | |
b64f50a1 | 13473 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
13474 | |
13475 | info_ptr += abbrev_len; | |
13476 | ||
13477 | if (abbrev == NULL) | |
13478 | return info_ptr; | |
13479 | ||
c906108c SS |
13480 | part_die->tag = abbrev->tag; |
13481 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
13482 | |
13483 | for (i = 0; i < abbrev->num_attrs; ++i) | |
13484 | { | |
dee91e82 | 13485 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
13486 | |
13487 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 13488 | partial symbol table. */ |
c906108c SS |
13489 | switch (attr.name) |
13490 | { | |
13491 | case DW_AT_name: | |
71c25dea TT |
13492 | switch (part_die->tag) |
13493 | { | |
13494 | case DW_TAG_compile_unit: | |
95554aad | 13495 | case DW_TAG_partial_unit: |
348e048f | 13496 | case DW_TAG_type_unit: |
71c25dea TT |
13497 | /* Compilation units have a DW_AT_name that is a filename, not |
13498 | a source language identifier. */ | |
13499 | case DW_TAG_enumeration_type: | |
13500 | case DW_TAG_enumerator: | |
13501 | /* These tags always have simple identifiers already; no need | |
13502 | to canonicalize them. */ | |
13503 | part_die->name = DW_STRING (&attr); | |
13504 | break; | |
13505 | default: | |
13506 | part_die->name | |
13507 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
bb5ed363 | 13508 | &objfile->objfile_obstack); |
71c25dea TT |
13509 | break; |
13510 | } | |
c906108c | 13511 | break; |
31ef98ae | 13512 | case DW_AT_linkage_name: |
c906108c | 13513 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
13514 | /* Note that both forms of linkage name might appear. We |
13515 | assume they will be the same, and we only store the last | |
13516 | one we see. */ | |
94af9270 KS |
13517 | if (cu->language == language_ada) |
13518 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 13519 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
13520 | break; |
13521 | case DW_AT_low_pc: | |
13522 | has_low_pc_attr = 1; | |
13523 | part_die->lowpc = DW_ADDR (&attr); | |
13524 | break; | |
13525 | case DW_AT_high_pc: | |
13526 | has_high_pc_attr = 1; | |
3019eac3 DE |
13527 | if (attr.form == DW_FORM_addr |
13528 | || attr.form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
13529 | part_die->highpc = DW_ADDR (&attr); |
13530 | else | |
13531 | { | |
13532 | high_pc_relative = 1; | |
13533 | part_die->highpc = DW_UNSND (&attr); | |
13534 | } | |
c906108c SS |
13535 | break; |
13536 | case DW_AT_location: | |
0963b4bd | 13537 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
13538 | if (attr_form_is_block (&attr)) |
13539 | { | |
95554aad | 13540 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 13541 | } |
3690dd37 | 13542 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 13543 | { |
4d3c2250 | 13544 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13545 | } |
13546 | else | |
13547 | { | |
4d3c2250 KB |
13548 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
13549 | "partial symbol information"); | |
8e19ed76 | 13550 | } |
c906108c | 13551 | break; |
c906108c SS |
13552 | case DW_AT_external: |
13553 | part_die->is_external = DW_UNSND (&attr); | |
13554 | break; | |
13555 | case DW_AT_declaration: | |
13556 | part_die->is_declaration = DW_UNSND (&attr); | |
13557 | break; | |
13558 | case DW_AT_type: | |
13559 | part_die->has_type = 1; | |
13560 | break; | |
13561 | case DW_AT_abstract_origin: | |
13562 | case DW_AT_specification: | |
72bf9492 DJ |
13563 | case DW_AT_extension: |
13564 | part_die->has_specification = 1; | |
c764a876 | 13565 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
13566 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
13567 | || cu->per_cu->is_dwz); | |
c906108c SS |
13568 | break; |
13569 | case DW_AT_sibling: | |
13570 | /* Ignore absolute siblings, they might point outside of | |
13571 | the current compile unit. */ | |
13572 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
13573 | complaint (&symfile_complaints, |
13574 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 13575 | else |
b64f50a1 | 13576 | part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
c906108c | 13577 | break; |
fa4028e9 JB |
13578 | case DW_AT_byte_size: |
13579 | part_die->has_byte_size = 1; | |
13580 | break; | |
68511cec CES |
13581 | case DW_AT_calling_convention: |
13582 | /* DWARF doesn't provide a way to identify a program's source-level | |
13583 | entry point. DW_AT_calling_convention attributes are only meant | |
13584 | to describe functions' calling conventions. | |
13585 | ||
13586 | However, because it's a necessary piece of information in | |
13587 | Fortran, and because DW_CC_program is the only piece of debugging | |
13588 | information whose definition refers to a 'main program' at all, | |
13589 | several compilers have begun marking Fortran main programs with | |
13590 | DW_CC_program --- even when those functions use the standard | |
13591 | calling conventions. | |
13592 | ||
13593 | So until DWARF specifies a way to provide this information and | |
13594 | compilers pick up the new representation, we'll support this | |
13595 | practice. */ | |
13596 | if (DW_UNSND (&attr) == DW_CC_program | |
13597 | && cu->language == language_fortran) | |
01f8c46d JK |
13598 | { |
13599 | set_main_name (part_die->name); | |
13600 | ||
13601 | /* As this DIE has a static linkage the name would be difficult | |
13602 | to look up later. */ | |
13603 | language_of_main = language_fortran; | |
13604 | } | |
68511cec | 13605 | break; |
481860b3 GB |
13606 | case DW_AT_inline: |
13607 | if (DW_UNSND (&attr) == DW_INL_inlined | |
13608 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
13609 | part_die->may_be_inlined = 1; | |
13610 | break; | |
95554aad TT |
13611 | |
13612 | case DW_AT_import: | |
13613 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
13614 | { |
13615 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
13616 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
13617 | || cu->per_cu->is_dwz); | |
13618 | } | |
95554aad TT |
13619 | break; |
13620 | ||
c906108c SS |
13621 | default: |
13622 | break; | |
13623 | } | |
13624 | } | |
13625 | ||
91da1414 MW |
13626 | if (high_pc_relative) |
13627 | part_die->highpc += part_die->lowpc; | |
13628 | ||
9373cf26 JK |
13629 | if (has_low_pc_attr && has_high_pc_attr) |
13630 | { | |
13631 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13632 | eliminate duplicate copies of functions and vtables and such. | |
13633 | The linker will arbitrarily choose one and discard the others. | |
13634 | The AT_*_pc values for such functions refer to local labels in | |
13635 | these sections. If the section from that file was discarded, the | |
13636 | labels are not in the output, so the relocs get a value of 0. | |
13637 | If this is a discarded function, mark the pc bounds as invalid, | |
13638 | so that GDB will ignore it. */ | |
13639 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
13640 | { | |
bb5ed363 | 13641 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13642 | |
13643 | complaint (&symfile_complaints, | |
13644 | _("DW_AT_low_pc %s is zero " | |
13645 | "for DIE at 0x%x [in module %s]"), | |
13646 | paddress (gdbarch, part_die->lowpc), | |
b64f50a1 | 13647 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13648 | } |
13649 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
13650 | else if (part_die->lowpc >= part_die->highpc) | |
13651 | { | |
bb5ed363 | 13652 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13653 | |
13654 | complaint (&symfile_complaints, | |
13655 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
13656 | "for DIE at 0x%x [in module %s]"), | |
13657 | paddress (gdbarch, part_die->lowpc), | |
13658 | paddress (gdbarch, part_die->highpc), | |
b64f50a1 | 13659 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13660 | } |
13661 | else | |
13662 | part_die->has_pc_info = 1; | |
13663 | } | |
85cbf3d3 | 13664 | |
c906108c SS |
13665 | return info_ptr; |
13666 | } | |
13667 | ||
72bf9492 DJ |
13668 | /* Find a cached partial DIE at OFFSET in CU. */ |
13669 | ||
13670 | static struct partial_die_info * | |
b64f50a1 | 13671 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
13672 | { |
13673 | struct partial_die_info *lookup_die = NULL; | |
13674 | struct partial_die_info part_die; | |
13675 | ||
13676 | part_die.offset = offset; | |
b64f50a1 JK |
13677 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
13678 | offset.sect_off); | |
72bf9492 | 13679 | |
72bf9492 DJ |
13680 | return lookup_die; |
13681 | } | |
13682 | ||
348e048f DE |
13683 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
13684 | except in the case of .debug_types DIEs which do not reference | |
13685 | outside their CU (they do however referencing other types via | |
55f1336d | 13686 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
13687 | |
13688 | static struct partial_die_info * | |
36586728 | 13689 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 13690 | { |
bb5ed363 | 13691 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
13692 | struct dwarf2_per_cu_data *per_cu = NULL; |
13693 | struct partial_die_info *pd = NULL; | |
72bf9492 | 13694 | |
36586728 TT |
13695 | if (offset_in_dwz == cu->per_cu->is_dwz |
13696 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
13697 | { |
13698 | pd = find_partial_die_in_comp_unit (offset, cu); | |
13699 | if (pd != NULL) | |
13700 | return pd; | |
0d99eb77 DE |
13701 | /* We missed recording what we needed. |
13702 | Load all dies and try again. */ | |
13703 | per_cu = cu->per_cu; | |
5afb4e99 | 13704 | } |
0d99eb77 DE |
13705 | else |
13706 | { | |
13707 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 13708 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
13709 | { |
13710 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
13711 | " external reference to offset 0x%lx [in module %s].\n"), | |
13712 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
13713 | bfd_get_filename (objfile->obfd)); | |
13714 | } | |
36586728 TT |
13715 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
13716 | objfile); | |
72bf9492 | 13717 | |
0d99eb77 DE |
13718 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
13719 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 13720 | |
0d99eb77 DE |
13721 | per_cu->cu->last_used = 0; |
13722 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
13723 | } | |
5afb4e99 | 13724 | |
dee91e82 DE |
13725 | /* If we didn't find it, and not all dies have been loaded, |
13726 | load them all and try again. */ | |
13727 | ||
5afb4e99 DJ |
13728 | if (pd == NULL && per_cu->load_all_dies == 0) |
13729 | { | |
5afb4e99 | 13730 | per_cu->load_all_dies = 1; |
fd820528 DE |
13731 | |
13732 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
13733 | THIS_CU->cu may already be in use. So we can't just free it and | |
13734 | replace its DIEs with the ones we read in. Instead, we leave those | |
13735 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
13736 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
13737 | set. */ | |
dee91e82 | 13738 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
13739 | |
13740 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
13741 | } | |
13742 | ||
13743 | if (pd == NULL) | |
13744 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
13745 | _("could not find partial DIE 0x%x " |
13746 | "in cache [from module %s]\n"), | |
b64f50a1 | 13747 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 13748 | return pd; |
72bf9492 DJ |
13749 | } |
13750 | ||
abc72ce4 DE |
13751 | /* See if we can figure out if the class lives in a namespace. We do |
13752 | this by looking for a member function; its demangled name will | |
13753 | contain namespace info, if there is any. */ | |
13754 | ||
13755 | static void | |
13756 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
13757 | struct dwarf2_cu *cu) | |
13758 | { | |
13759 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
13760 | what template types look like, because the demangler | |
13761 | frequently doesn't give the same name as the debug info. We | |
13762 | could fix this by only using the demangled name to get the | |
13763 | prefix (but see comment in read_structure_type). */ | |
13764 | ||
13765 | struct partial_die_info *real_pdi; | |
13766 | struct partial_die_info *child_pdi; | |
13767 | ||
13768 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
13769 | we should not do this. We'll prepend the parent's fully qualified | |
13770 | name when we create the partial symbol. */ | |
13771 | ||
13772 | real_pdi = struct_pdi; | |
13773 | while (real_pdi->has_specification) | |
36586728 TT |
13774 | real_pdi = find_partial_die (real_pdi->spec_offset, |
13775 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
13776 | |
13777 | if (real_pdi->die_parent != NULL) | |
13778 | return; | |
13779 | ||
13780 | for (child_pdi = struct_pdi->die_child; | |
13781 | child_pdi != NULL; | |
13782 | child_pdi = child_pdi->die_sibling) | |
13783 | { | |
13784 | if (child_pdi->tag == DW_TAG_subprogram | |
13785 | && child_pdi->linkage_name != NULL) | |
13786 | { | |
13787 | char *actual_class_name | |
13788 | = language_class_name_from_physname (cu->language_defn, | |
13789 | child_pdi->linkage_name); | |
13790 | if (actual_class_name != NULL) | |
13791 | { | |
13792 | struct_pdi->name | |
13793 | = obsavestring (actual_class_name, | |
13794 | strlen (actual_class_name), | |
13795 | &cu->objfile->objfile_obstack); | |
13796 | xfree (actual_class_name); | |
13797 | } | |
13798 | break; | |
13799 | } | |
13800 | } | |
13801 | } | |
13802 | ||
72bf9492 DJ |
13803 | /* Adjust PART_DIE before generating a symbol for it. This function |
13804 | may set the is_external flag or change the DIE's name. */ | |
13805 | ||
13806 | static void | |
13807 | fixup_partial_die (struct partial_die_info *part_die, | |
13808 | struct dwarf2_cu *cu) | |
13809 | { | |
abc72ce4 DE |
13810 | /* Once we've fixed up a die, there's no point in doing so again. |
13811 | This also avoids a memory leak if we were to call | |
13812 | guess_partial_die_structure_name multiple times. */ | |
13813 | if (part_die->fixup_called) | |
13814 | return; | |
13815 | ||
72bf9492 DJ |
13816 | /* If we found a reference attribute and the DIE has no name, try |
13817 | to find a name in the referred to DIE. */ | |
13818 | ||
13819 | if (part_die->name == NULL && part_die->has_specification) | |
13820 | { | |
13821 | struct partial_die_info *spec_die; | |
72bf9492 | 13822 | |
36586728 TT |
13823 | spec_die = find_partial_die (part_die->spec_offset, |
13824 | part_die->spec_is_dwz, cu); | |
72bf9492 | 13825 | |
10b3939b | 13826 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
13827 | |
13828 | if (spec_die->name) | |
13829 | { | |
13830 | part_die->name = spec_die->name; | |
13831 | ||
13832 | /* Copy DW_AT_external attribute if it is set. */ | |
13833 | if (spec_die->is_external) | |
13834 | part_die->is_external = spec_die->is_external; | |
13835 | } | |
13836 | } | |
13837 | ||
13838 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
13839 | |
13840 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 13841 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 13842 | |
abc72ce4 DE |
13843 | /* If there is no parent die to provide a namespace, and there are |
13844 | children, see if we can determine the namespace from their linkage | |
122d1940 | 13845 | name. */ |
abc72ce4 | 13846 | if (cu->language == language_cplus |
8b70b953 | 13847 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
13848 | && part_die->die_parent == NULL |
13849 | && part_die->has_children | |
13850 | && (part_die->tag == DW_TAG_class_type | |
13851 | || part_die->tag == DW_TAG_structure_type | |
13852 | || part_die->tag == DW_TAG_union_type)) | |
13853 | guess_partial_die_structure_name (part_die, cu); | |
13854 | ||
53832f31 TT |
13855 | /* GCC might emit a nameless struct or union that has a linkage |
13856 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
13857 | if (part_die->name == NULL | |
96408a79 SA |
13858 | && (part_die->tag == DW_TAG_class_type |
13859 | || part_die->tag == DW_TAG_interface_type | |
13860 | || part_die->tag == DW_TAG_structure_type | |
13861 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
13862 | && part_die->linkage_name != NULL) |
13863 | { | |
13864 | char *demangled; | |
13865 | ||
13866 | demangled = cplus_demangle (part_die->linkage_name, DMGL_TYPES); | |
13867 | if (demangled) | |
13868 | { | |
96408a79 SA |
13869 | const char *base; |
13870 | ||
13871 | /* Strip any leading namespaces/classes, keep only the base name. | |
13872 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
13873 | base = strrchr (demangled, ':'); | |
13874 | if (base && base > demangled && base[-1] == ':') | |
13875 | base++; | |
13876 | else | |
13877 | base = demangled; | |
13878 | ||
13879 | part_die->name = obsavestring (base, strlen (base), | |
53832f31 TT |
13880 | &cu->objfile->objfile_obstack); |
13881 | xfree (demangled); | |
13882 | } | |
13883 | } | |
13884 | ||
abc72ce4 | 13885 | part_die->fixup_called = 1; |
72bf9492 DJ |
13886 | } |
13887 | ||
a8329558 | 13888 | /* Read an attribute value described by an attribute form. */ |
c906108c | 13889 | |
fe1b8b76 | 13890 | static gdb_byte * |
dee91e82 DE |
13891 | read_attribute_value (const struct die_reader_specs *reader, |
13892 | struct attribute *attr, unsigned form, | |
13893 | gdb_byte *info_ptr) | |
c906108c | 13894 | { |
dee91e82 DE |
13895 | struct dwarf2_cu *cu = reader->cu; |
13896 | bfd *abfd = reader->abfd; | |
e7c27a73 | 13897 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
13898 | unsigned int bytes_read; |
13899 | struct dwarf_block *blk; | |
13900 | ||
a8329558 KW |
13901 | attr->form = form; |
13902 | switch (form) | |
c906108c | 13903 | { |
c906108c | 13904 | case DW_FORM_ref_addr: |
ae411497 | 13905 | if (cu->header.version == 2) |
4568ecf9 | 13906 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 13907 | else |
4568ecf9 DE |
13908 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
13909 | &cu->header, &bytes_read); | |
ae411497 TT |
13910 | info_ptr += bytes_read; |
13911 | break; | |
36586728 TT |
13912 | case DW_FORM_GNU_ref_alt: |
13913 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
13914 | info_ptr += bytes_read; | |
13915 | break; | |
ae411497 | 13916 | case DW_FORM_addr: |
e7c27a73 | 13917 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 13918 | info_ptr += bytes_read; |
c906108c SS |
13919 | break; |
13920 | case DW_FORM_block2: | |
7b5a2f43 | 13921 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13922 | blk->size = read_2_bytes (abfd, info_ptr); |
13923 | info_ptr += 2; | |
13924 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13925 | info_ptr += blk->size; | |
13926 | DW_BLOCK (attr) = blk; | |
13927 | break; | |
13928 | case DW_FORM_block4: | |
7b5a2f43 | 13929 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13930 | blk->size = read_4_bytes (abfd, info_ptr); |
13931 | info_ptr += 4; | |
13932 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13933 | info_ptr += blk->size; | |
13934 | DW_BLOCK (attr) = blk; | |
13935 | break; | |
13936 | case DW_FORM_data2: | |
13937 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
13938 | info_ptr += 2; | |
13939 | break; | |
13940 | case DW_FORM_data4: | |
13941 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
13942 | info_ptr += 4; | |
13943 | break; | |
13944 | case DW_FORM_data8: | |
13945 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
13946 | info_ptr += 8; | |
13947 | break; | |
2dc7f7b3 TT |
13948 | case DW_FORM_sec_offset: |
13949 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
13950 | info_ptr += bytes_read; | |
13951 | break; | |
c906108c | 13952 | case DW_FORM_string: |
9b1c24c8 | 13953 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 13954 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
13955 | info_ptr += bytes_read; |
13956 | break; | |
4bdf3d34 | 13957 | case DW_FORM_strp: |
36586728 TT |
13958 | if (!cu->per_cu->is_dwz) |
13959 | { | |
13960 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
13961 | &bytes_read); | |
13962 | DW_STRING_IS_CANONICAL (attr) = 0; | |
13963 | info_ptr += bytes_read; | |
13964 | break; | |
13965 | } | |
13966 | /* FALLTHROUGH */ | |
13967 | case DW_FORM_GNU_strp_alt: | |
13968 | { | |
13969 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
13970 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
13971 | &bytes_read); | |
13972 | ||
13973 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
13974 | DW_STRING_IS_CANONICAL (attr) = 0; | |
13975 | info_ptr += bytes_read; | |
13976 | } | |
4bdf3d34 | 13977 | break; |
2dc7f7b3 | 13978 | case DW_FORM_exprloc: |
c906108c | 13979 | case DW_FORM_block: |
7b5a2f43 | 13980 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13981 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
13982 | info_ptr += bytes_read; | |
13983 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13984 | info_ptr += blk->size; | |
13985 | DW_BLOCK (attr) = blk; | |
13986 | break; | |
13987 | case DW_FORM_block1: | |
7b5a2f43 | 13988 | blk = dwarf_alloc_block (cu); |
c906108c SS |
13989 | blk->size = read_1_byte (abfd, info_ptr); |
13990 | info_ptr += 1; | |
13991 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
13992 | info_ptr += blk->size; | |
13993 | DW_BLOCK (attr) = blk; | |
13994 | break; | |
13995 | case DW_FORM_data1: | |
13996 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
13997 | info_ptr += 1; | |
13998 | break; | |
13999 | case DW_FORM_flag: | |
14000 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
14001 | info_ptr += 1; | |
14002 | break; | |
2dc7f7b3 TT |
14003 | case DW_FORM_flag_present: |
14004 | DW_UNSND (attr) = 1; | |
14005 | break; | |
c906108c SS |
14006 | case DW_FORM_sdata: |
14007 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
14008 | info_ptr += bytes_read; | |
14009 | break; | |
14010 | case DW_FORM_udata: | |
14011 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14012 | info_ptr += bytes_read; | |
14013 | break; | |
14014 | case DW_FORM_ref1: | |
4568ecf9 DE |
14015 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14016 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
14017 | info_ptr += 1; |
14018 | break; | |
14019 | case DW_FORM_ref2: | |
4568ecf9 DE |
14020 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14021 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
14022 | info_ptr += 2; |
14023 | break; | |
14024 | case DW_FORM_ref4: | |
4568ecf9 DE |
14025 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14026 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
14027 | info_ptr += 4; |
14028 | break; | |
613e1657 | 14029 | case DW_FORM_ref8: |
4568ecf9 DE |
14030 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14031 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
14032 | info_ptr += 8; |
14033 | break; | |
55f1336d | 14034 | case DW_FORM_ref_sig8: |
348e048f DE |
14035 | /* Convert the signature to something we can record in DW_UNSND |
14036 | for later lookup. | |
14037 | NOTE: This is NULL if the type wasn't found. */ | |
14038 | DW_SIGNATURED_TYPE (attr) = | |
e319fa28 | 14039 | lookup_signatured_type (read_8_bytes (abfd, info_ptr)); |
348e048f DE |
14040 | info_ptr += 8; |
14041 | break; | |
c906108c | 14042 | case DW_FORM_ref_udata: |
4568ecf9 DE |
14043 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14044 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
14045 | info_ptr += bytes_read; |
14046 | break; | |
c906108c | 14047 | case DW_FORM_indirect: |
a8329558 KW |
14048 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14049 | info_ptr += bytes_read; | |
dee91e82 | 14050 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 14051 | break; |
3019eac3 DE |
14052 | case DW_FORM_GNU_addr_index: |
14053 | if (reader->dwo_file == NULL) | |
14054 | { | |
14055 | /* For now flag a hard error. | |
14056 | Later we can turn this into a complaint. */ | |
14057 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14058 | dwarf_form_name (form), | |
14059 | bfd_get_filename (abfd)); | |
14060 | } | |
14061 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
14062 | info_ptr += bytes_read; | |
14063 | break; | |
14064 | case DW_FORM_GNU_str_index: | |
14065 | if (reader->dwo_file == NULL) | |
14066 | { | |
14067 | /* For now flag a hard error. | |
14068 | Later we can turn this into a complaint if warranted. */ | |
14069 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14070 | dwarf_form_name (form), | |
14071 | bfd_get_filename (abfd)); | |
14072 | } | |
14073 | { | |
14074 | ULONGEST str_index = | |
14075 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14076 | ||
14077 | DW_STRING (attr) = read_str_index (reader, cu, str_index); | |
14078 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14079 | info_ptr += bytes_read; | |
14080 | } | |
14081 | break; | |
c906108c | 14082 | default: |
8a3fe4f8 | 14083 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
14084 | dwarf_form_name (form), |
14085 | bfd_get_filename (abfd)); | |
c906108c | 14086 | } |
28e94949 | 14087 | |
36586728 TT |
14088 | /* Super hack. */ |
14089 | if (cu->per_cu->is_dwz && is_ref_attr (attr)) | |
14090 | attr->form = DW_FORM_GNU_ref_alt; | |
14091 | ||
28e94949 JB |
14092 | /* We have seen instances where the compiler tried to emit a byte |
14093 | size attribute of -1 which ended up being encoded as an unsigned | |
14094 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
14095 | an object of this size seems pretty unlikely so we can relatively | |
14096 | safely treat these cases as if the size attribute was invalid and | |
14097 | treat them as zero by default. */ | |
14098 | if (attr->name == DW_AT_byte_size | |
14099 | && form == DW_FORM_data4 | |
14100 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
14101 | { |
14102 | complaint | |
14103 | (&symfile_complaints, | |
43bbcdc2 PH |
14104 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
14105 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
14106 | DW_UNSND (attr) = 0; |
14107 | } | |
28e94949 | 14108 | |
c906108c SS |
14109 | return info_ptr; |
14110 | } | |
14111 | ||
a8329558 KW |
14112 | /* Read an attribute described by an abbreviated attribute. */ |
14113 | ||
fe1b8b76 | 14114 | static gdb_byte * |
dee91e82 DE |
14115 | read_attribute (const struct die_reader_specs *reader, |
14116 | struct attribute *attr, struct attr_abbrev *abbrev, | |
14117 | gdb_byte *info_ptr) | |
a8329558 KW |
14118 | { |
14119 | attr->name = abbrev->name; | |
dee91e82 | 14120 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
14121 | } |
14122 | ||
0963b4bd | 14123 | /* Read dwarf information from a buffer. */ |
c906108c SS |
14124 | |
14125 | static unsigned int | |
a1855c1d | 14126 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14127 | { |
fe1b8b76 | 14128 | return bfd_get_8 (abfd, buf); |
c906108c SS |
14129 | } |
14130 | ||
14131 | static int | |
a1855c1d | 14132 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14133 | { |
fe1b8b76 | 14134 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
14135 | } |
14136 | ||
14137 | static unsigned int | |
a1855c1d | 14138 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14139 | { |
fe1b8b76 | 14140 | return bfd_get_16 (abfd, buf); |
c906108c SS |
14141 | } |
14142 | ||
21ae7a4d | 14143 | static int |
a1855c1d | 14144 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14145 | { |
14146 | return bfd_get_signed_16 (abfd, buf); | |
14147 | } | |
14148 | ||
c906108c | 14149 | static unsigned int |
a1855c1d | 14150 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14151 | { |
fe1b8b76 | 14152 | return bfd_get_32 (abfd, buf); |
c906108c SS |
14153 | } |
14154 | ||
21ae7a4d | 14155 | static int |
a1855c1d | 14156 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14157 | { |
14158 | return bfd_get_signed_32 (abfd, buf); | |
14159 | } | |
14160 | ||
93311388 | 14161 | static ULONGEST |
a1855c1d | 14162 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14163 | { |
fe1b8b76 | 14164 | return bfd_get_64 (abfd, buf); |
c906108c SS |
14165 | } |
14166 | ||
14167 | static CORE_ADDR | |
fe1b8b76 | 14168 | read_address (bfd *abfd, gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 14169 | unsigned int *bytes_read) |
c906108c | 14170 | { |
e7c27a73 | 14171 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
14172 | CORE_ADDR retval = 0; |
14173 | ||
107d2387 | 14174 | if (cu_header->signed_addr_p) |
c906108c | 14175 | { |
107d2387 AC |
14176 | switch (cu_header->addr_size) |
14177 | { | |
14178 | case 2: | |
fe1b8b76 | 14179 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
14180 | break; |
14181 | case 4: | |
fe1b8b76 | 14182 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
14183 | break; |
14184 | case 8: | |
fe1b8b76 | 14185 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
14186 | break; |
14187 | default: | |
8e65ff28 | 14188 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 14189 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 14190 | bfd_get_filename (abfd)); |
107d2387 AC |
14191 | } |
14192 | } | |
14193 | else | |
14194 | { | |
14195 | switch (cu_header->addr_size) | |
14196 | { | |
14197 | case 2: | |
fe1b8b76 | 14198 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
14199 | break; |
14200 | case 4: | |
fe1b8b76 | 14201 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
14202 | break; |
14203 | case 8: | |
fe1b8b76 | 14204 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
14205 | break; |
14206 | default: | |
8e65ff28 | 14207 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
14208 | _("read_address: bad switch, " |
14209 | "unsigned [in module %s]"), | |
659b0389 | 14210 | bfd_get_filename (abfd)); |
107d2387 | 14211 | } |
c906108c | 14212 | } |
64367e0a | 14213 | |
107d2387 AC |
14214 | *bytes_read = cu_header->addr_size; |
14215 | return retval; | |
c906108c SS |
14216 | } |
14217 | ||
f7ef9339 | 14218 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
14219 | specification allows the initial length to take up either 4 bytes |
14220 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
14221 | bytes describe the length and all offsets will be 8 bytes in length | |
14222 | instead of 4. | |
14223 | ||
f7ef9339 KB |
14224 | An older, non-standard 64-bit format is also handled by this |
14225 | function. The older format in question stores the initial length | |
14226 | as an 8-byte quantity without an escape value. Lengths greater | |
14227 | than 2^32 aren't very common which means that the initial 4 bytes | |
14228 | is almost always zero. Since a length value of zero doesn't make | |
14229 | sense for the 32-bit format, this initial zero can be considered to | |
14230 | be an escape value which indicates the presence of the older 64-bit | |
14231 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
14232 | greater than 4GB. If it becomes necessary to handle lengths |
14233 | somewhat larger than 4GB, we could allow other small values (such | |
14234 | as the non-sensical values of 1, 2, and 3) to also be used as | |
14235 | escape values indicating the presence of the old format. | |
f7ef9339 | 14236 | |
917c78fc MK |
14237 | The value returned via bytes_read should be used to increment the |
14238 | relevant pointer after calling read_initial_length(). | |
c764a876 | 14239 | |
613e1657 KB |
14240 | [ Note: read_initial_length() and read_offset() are based on the |
14241 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 14242 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
14243 | from: |
14244 | ||
f7ef9339 | 14245 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 14246 | |
613e1657 KB |
14247 | This document is only a draft and is subject to change. (So beware.) |
14248 | ||
f7ef9339 | 14249 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
14250 | determined empirically by examining 64-bit ELF files produced by |
14251 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
14252 | |
14253 | - Kevin, July 16, 2002 | |
613e1657 KB |
14254 | ] */ |
14255 | ||
14256 | static LONGEST | |
c764a876 | 14257 | read_initial_length (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 14258 | { |
fe1b8b76 | 14259 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 14260 | |
dd373385 | 14261 | if (length == 0xffffffff) |
613e1657 | 14262 | { |
fe1b8b76 | 14263 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 14264 | *bytes_read = 12; |
613e1657 | 14265 | } |
dd373385 | 14266 | else if (length == 0) |
f7ef9339 | 14267 | { |
dd373385 | 14268 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 14269 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 14270 | *bytes_read = 8; |
f7ef9339 | 14271 | } |
613e1657 KB |
14272 | else |
14273 | { | |
14274 | *bytes_read = 4; | |
613e1657 KB |
14275 | } |
14276 | ||
c764a876 DE |
14277 | return length; |
14278 | } | |
dd373385 | 14279 | |
c764a876 DE |
14280 | /* Cover function for read_initial_length. |
14281 | Returns the length of the object at BUF, and stores the size of the | |
14282 | initial length in *BYTES_READ and stores the size that offsets will be in | |
14283 | *OFFSET_SIZE. | |
14284 | If the initial length size is not equivalent to that specified in | |
14285 | CU_HEADER then issue a complaint. | |
14286 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 14287 | |
c764a876 DE |
14288 | static LONGEST |
14289 | read_checked_initial_length_and_offset (bfd *abfd, gdb_byte *buf, | |
14290 | const struct comp_unit_head *cu_header, | |
14291 | unsigned int *bytes_read, | |
14292 | unsigned int *offset_size) | |
14293 | { | |
14294 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
14295 | ||
14296 | gdb_assert (cu_header->initial_length_size == 4 | |
14297 | || cu_header->initial_length_size == 8 | |
14298 | || cu_header->initial_length_size == 12); | |
14299 | ||
14300 | if (cu_header->initial_length_size != *bytes_read) | |
14301 | complaint (&symfile_complaints, | |
14302 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 14303 | |
c764a876 | 14304 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 14305 | return length; |
613e1657 KB |
14306 | } |
14307 | ||
14308 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 14309 | given by cu_header->offset_size. */ |
613e1657 KB |
14310 | |
14311 | static LONGEST | |
fe1b8b76 | 14312 | read_offset (bfd *abfd, gdb_byte *buf, const struct comp_unit_head *cu_header, |
891d2f0b | 14313 | unsigned int *bytes_read) |
c764a876 DE |
14314 | { |
14315 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 14316 | |
c764a876 DE |
14317 | *bytes_read = cu_header->offset_size; |
14318 | return offset; | |
14319 | } | |
14320 | ||
14321 | /* Read an offset from the data stream. */ | |
14322 | ||
14323 | static LONGEST | |
14324 | read_offset_1 (bfd *abfd, gdb_byte *buf, unsigned int offset_size) | |
613e1657 KB |
14325 | { |
14326 | LONGEST retval = 0; | |
14327 | ||
c764a876 | 14328 | switch (offset_size) |
613e1657 KB |
14329 | { |
14330 | case 4: | |
fe1b8b76 | 14331 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
14332 | break; |
14333 | case 8: | |
fe1b8b76 | 14334 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
14335 | break; |
14336 | default: | |
8e65ff28 | 14337 | internal_error (__FILE__, __LINE__, |
c764a876 | 14338 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 14339 | bfd_get_filename (abfd)); |
613e1657 KB |
14340 | } |
14341 | ||
917c78fc | 14342 | return retval; |
613e1657 KB |
14343 | } |
14344 | ||
fe1b8b76 JB |
14345 | static gdb_byte * |
14346 | read_n_bytes (bfd *abfd, gdb_byte *buf, unsigned int size) | |
c906108c SS |
14347 | { |
14348 | /* If the size of a host char is 8 bits, we can return a pointer | |
14349 | to the buffer, otherwise we have to copy the data to a buffer | |
14350 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14351 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 14352 | return buf; |
c906108c SS |
14353 | } |
14354 | ||
14355 | static char * | |
9b1c24c8 | 14356 | read_direct_string (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c SS |
14357 | { |
14358 | /* If the size of a host char is 8 bits, we can return a pointer | |
14359 | to the string, otherwise we have to copy the string to a buffer | |
14360 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14361 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
14362 | if (*buf == '\0') |
14363 | { | |
14364 | *bytes_read_ptr = 1; | |
14365 | return NULL; | |
14366 | } | |
fe1b8b76 JB |
14367 | *bytes_read_ptr = strlen ((char *) buf) + 1; |
14368 | return (char *) buf; | |
4bdf3d34 JJ |
14369 | } |
14370 | ||
14371 | static char * | |
cf2c3c16 | 14372 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 14373 | { |
be391dca | 14374 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 14375 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
14376 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
14377 | bfd_get_filename (abfd)); | |
dce234bc | 14378 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
14379 | error (_("DW_FORM_strp pointing outside of " |
14380 | ".debug_str section [in module %s]"), | |
14381 | bfd_get_filename (abfd)); | |
4bdf3d34 | 14382 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 14383 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 14384 | return NULL; |
dce234bc | 14385 | return (char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
14386 | } |
14387 | ||
36586728 TT |
14388 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
14389 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
14390 | the string consists of a single NUL byte, return NULL; otherwise | |
14391 | return a pointer to the string. */ | |
14392 | ||
14393 | static char * | |
14394 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) | |
14395 | { | |
14396 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
14397 | ||
14398 | if (dwz->str.buffer == NULL) | |
14399 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
14400 | "section [in module %s]"), | |
14401 | bfd_get_filename (dwz->dwz_bfd)); | |
14402 | if (str_offset >= dwz->str.size) | |
14403 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
14404 | ".debug_str section [in module %s]"), | |
14405 | bfd_get_filename (dwz->dwz_bfd)); | |
14406 | gdb_assert (HOST_CHAR_BIT == 8); | |
14407 | if (dwz->str.buffer[str_offset] == '\0') | |
14408 | return NULL; | |
14409 | return (char *) (dwz->str.buffer + str_offset); | |
14410 | } | |
14411 | ||
cf2c3c16 TT |
14412 | static char * |
14413 | read_indirect_string (bfd *abfd, gdb_byte *buf, | |
14414 | const struct comp_unit_head *cu_header, | |
14415 | unsigned int *bytes_read_ptr) | |
14416 | { | |
14417 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
14418 | ||
14419 | return read_indirect_string_at_offset (abfd, str_offset); | |
14420 | } | |
14421 | ||
12df843f | 14422 | static ULONGEST |
fe1b8b76 | 14423 | read_unsigned_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 14424 | { |
12df843f | 14425 | ULONGEST result; |
ce5d95e1 | 14426 | unsigned int num_read; |
c906108c SS |
14427 | int i, shift; |
14428 | unsigned char byte; | |
14429 | ||
14430 | result = 0; | |
14431 | shift = 0; | |
14432 | num_read = 0; | |
14433 | i = 0; | |
14434 | while (1) | |
14435 | { | |
fe1b8b76 | 14436 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14437 | buf++; |
14438 | num_read++; | |
12df843f | 14439 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
14440 | if ((byte & 128) == 0) |
14441 | { | |
14442 | break; | |
14443 | } | |
14444 | shift += 7; | |
14445 | } | |
14446 | *bytes_read_ptr = num_read; | |
14447 | return result; | |
14448 | } | |
14449 | ||
12df843f | 14450 | static LONGEST |
fe1b8b76 | 14451 | read_signed_leb128 (bfd *abfd, gdb_byte *buf, unsigned int *bytes_read_ptr) |
c906108c | 14452 | { |
12df843f | 14453 | LONGEST result; |
77e0b926 | 14454 | int i, shift, num_read; |
c906108c SS |
14455 | unsigned char byte; |
14456 | ||
14457 | result = 0; | |
14458 | shift = 0; | |
c906108c SS |
14459 | num_read = 0; |
14460 | i = 0; | |
14461 | while (1) | |
14462 | { | |
fe1b8b76 | 14463 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14464 | buf++; |
14465 | num_read++; | |
12df843f | 14466 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
14467 | shift += 7; |
14468 | if ((byte & 128) == 0) | |
14469 | { | |
14470 | break; | |
14471 | } | |
14472 | } | |
77e0b926 | 14473 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 14474 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
14475 | *bytes_read_ptr = num_read; |
14476 | return result; | |
14477 | } | |
14478 | ||
3019eac3 DE |
14479 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
14480 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
14481 | ADDR_SIZE is the size of addresses from the CU header. */ | |
14482 | ||
14483 | static CORE_ADDR | |
14484 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
14485 | { | |
14486 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14487 | bfd *abfd = objfile->obfd; | |
14488 | const gdb_byte *info_ptr; | |
14489 | ||
14490 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
14491 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
14492 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
14493 | objfile->name); | |
14494 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) | |
14495 | error (_("DW_FORM_addr_index pointing outside of " | |
14496 | ".debug_addr section [in module %s]"), | |
14497 | objfile->name); | |
14498 | info_ptr = (dwarf2_per_objfile->addr.buffer | |
14499 | + addr_base + addr_index * addr_size); | |
14500 | if (addr_size == 4) | |
14501 | return bfd_get_32 (abfd, info_ptr); | |
14502 | else | |
14503 | return bfd_get_64 (abfd, info_ptr); | |
14504 | } | |
14505 | ||
14506 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
14507 | ||
14508 | static CORE_ADDR | |
14509 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
14510 | { | |
14511 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
14512 | } | |
14513 | ||
14514 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
14515 | ||
14516 | static CORE_ADDR | |
14517 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, gdb_byte *info_ptr, | |
14518 | unsigned int *bytes_read) | |
14519 | { | |
14520 | bfd *abfd = cu->objfile->obfd; | |
14521 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
14522 | ||
14523 | return read_addr_index (cu, addr_index); | |
14524 | } | |
14525 | ||
14526 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
14527 | back to dwarf2_read_addr_index. */ | |
14528 | ||
14529 | struct dwarf2_read_addr_index_data | |
14530 | { | |
14531 | ULONGEST addr_base; | |
14532 | int addr_size; | |
14533 | }; | |
14534 | ||
14535 | /* die_reader_func for dwarf2_read_addr_index. */ | |
14536 | ||
14537 | static void | |
14538 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
14539 | gdb_byte *info_ptr, | |
14540 | struct die_info *comp_unit_die, | |
14541 | int has_children, | |
14542 | void *data) | |
14543 | { | |
14544 | struct dwarf2_cu *cu = reader->cu; | |
14545 | struct dwarf2_read_addr_index_data *aidata = | |
14546 | (struct dwarf2_read_addr_index_data *) data; | |
14547 | ||
14548 | aidata->addr_base = cu->addr_base; | |
14549 | aidata->addr_size = cu->header.addr_size; | |
14550 | } | |
14551 | ||
14552 | /* Given an index in .debug_addr, fetch the value. | |
14553 | NOTE: This can be called during dwarf expression evaluation, | |
14554 | long after the debug information has been read, and thus per_cu->cu | |
14555 | may no longer exist. */ | |
14556 | ||
14557 | CORE_ADDR | |
14558 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
14559 | unsigned int addr_index) | |
14560 | { | |
14561 | struct objfile *objfile = per_cu->objfile; | |
14562 | struct dwarf2_cu *cu = per_cu->cu; | |
14563 | ULONGEST addr_base; | |
14564 | int addr_size; | |
14565 | ||
14566 | /* This is intended to be called from outside this file. */ | |
14567 | dw2_setup (objfile); | |
14568 | ||
14569 | /* We need addr_base and addr_size. | |
14570 | If we don't have PER_CU->cu, we have to get it. | |
14571 | Nasty, but the alternative is storing the needed info in PER_CU, | |
14572 | which at this point doesn't seem justified: it's not clear how frequently | |
14573 | it would get used and it would increase the size of every PER_CU. | |
14574 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
14575 | so we're not in uncharted territory here. | |
14576 | Alas we need to be a bit more complicated as addr_base is contained | |
14577 | in the DIE. | |
14578 | ||
14579 | We don't need to read the entire CU(/TU). | |
14580 | We just need the header and top level die. | |
a1b64ce1 | 14581 | |
3019eac3 | 14582 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 14583 | For now we skip this optimization. */ |
3019eac3 DE |
14584 | |
14585 | if (cu != NULL) | |
14586 | { | |
14587 | addr_base = cu->addr_base; | |
14588 | addr_size = cu->header.addr_size; | |
14589 | } | |
14590 | else | |
14591 | { | |
14592 | struct dwarf2_read_addr_index_data aidata; | |
14593 | ||
a1b64ce1 DE |
14594 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
14595 | we need addr_base. */ | |
14596 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
14597 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
14598 | addr_base = aidata.addr_base; |
14599 | addr_size = aidata.addr_size; | |
14600 | } | |
14601 | ||
14602 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
14603 | } | |
14604 | ||
14605 | /* Given a DW_AT_str_index, fetch the string. */ | |
14606 | ||
14607 | static char * | |
14608 | read_str_index (const struct die_reader_specs *reader, | |
14609 | struct dwarf2_cu *cu, ULONGEST str_index) | |
14610 | { | |
14611 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14612 | const char *dwo_name = objfile->name; | |
14613 | bfd *abfd = objfile->obfd; | |
14614 | struct dwo_sections *sections = &reader->dwo_file->sections; | |
14615 | gdb_byte *info_ptr; | |
14616 | ULONGEST str_offset; | |
14617 | ||
14618 | dwarf2_read_section (objfile, §ions->str); | |
14619 | dwarf2_read_section (objfile, §ions->str_offsets); | |
14620 | if (sections->str.buffer == NULL) | |
14621 | error (_("DW_FORM_str_index used without .debug_str.dwo section" | |
14622 | " in CU at offset 0x%lx [in module %s]"), | |
14623 | (long) cu->header.offset.sect_off, dwo_name); | |
14624 | if (sections->str_offsets.buffer == NULL) | |
14625 | error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section" | |
14626 | " in CU at offset 0x%lx [in module %s]"), | |
14627 | (long) cu->header.offset.sect_off, dwo_name); | |
14628 | if (str_index * cu->header.offset_size >= sections->str_offsets.size) | |
14629 | error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo" | |
14630 | " section in CU at offset 0x%lx [in module %s]"), | |
14631 | (long) cu->header.offset.sect_off, dwo_name); | |
14632 | info_ptr = (sections->str_offsets.buffer | |
14633 | + str_index * cu->header.offset_size); | |
14634 | if (cu->header.offset_size == 4) | |
14635 | str_offset = bfd_get_32 (abfd, info_ptr); | |
14636 | else | |
14637 | str_offset = bfd_get_64 (abfd, info_ptr); | |
14638 | if (str_offset >= sections->str.size) | |
14639 | error (_("Offset from DW_FORM_str_index pointing outside of" | |
14640 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), | |
14641 | (long) cu->header.offset.sect_off, dwo_name); | |
14642 | return (char *) (sections->str.buffer + str_offset); | |
14643 | } | |
14644 | ||
3019eac3 DE |
14645 | /* Return the length of an LEB128 number in BUF. */ |
14646 | ||
14647 | static int | |
14648 | leb128_size (const gdb_byte *buf) | |
14649 | { | |
14650 | const gdb_byte *begin = buf; | |
14651 | gdb_byte byte; | |
14652 | ||
14653 | while (1) | |
14654 | { | |
14655 | byte = *buf++; | |
14656 | if ((byte & 128) == 0) | |
14657 | return buf - begin; | |
14658 | } | |
14659 | } | |
14660 | ||
c906108c | 14661 | static void |
e142c38c | 14662 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
14663 | { |
14664 | switch (lang) | |
14665 | { | |
14666 | case DW_LANG_C89: | |
76bee0cc | 14667 | case DW_LANG_C99: |
c906108c | 14668 | case DW_LANG_C: |
e142c38c | 14669 | cu->language = language_c; |
c906108c SS |
14670 | break; |
14671 | case DW_LANG_C_plus_plus: | |
e142c38c | 14672 | cu->language = language_cplus; |
c906108c | 14673 | break; |
6aecb9c2 JB |
14674 | case DW_LANG_D: |
14675 | cu->language = language_d; | |
14676 | break; | |
c906108c SS |
14677 | case DW_LANG_Fortran77: |
14678 | case DW_LANG_Fortran90: | |
b21b22e0 | 14679 | case DW_LANG_Fortran95: |
e142c38c | 14680 | cu->language = language_fortran; |
c906108c | 14681 | break; |
a766d390 DE |
14682 | case DW_LANG_Go: |
14683 | cu->language = language_go; | |
14684 | break; | |
c906108c | 14685 | case DW_LANG_Mips_Assembler: |
e142c38c | 14686 | cu->language = language_asm; |
c906108c | 14687 | break; |
bebd888e | 14688 | case DW_LANG_Java: |
e142c38c | 14689 | cu->language = language_java; |
bebd888e | 14690 | break; |
c906108c | 14691 | case DW_LANG_Ada83: |
8aaf0b47 | 14692 | case DW_LANG_Ada95: |
bc5f45f8 JB |
14693 | cu->language = language_ada; |
14694 | break; | |
72019c9c GM |
14695 | case DW_LANG_Modula2: |
14696 | cu->language = language_m2; | |
14697 | break; | |
fe8e67fd PM |
14698 | case DW_LANG_Pascal83: |
14699 | cu->language = language_pascal; | |
14700 | break; | |
22566fbd DJ |
14701 | case DW_LANG_ObjC: |
14702 | cu->language = language_objc; | |
14703 | break; | |
c906108c SS |
14704 | case DW_LANG_Cobol74: |
14705 | case DW_LANG_Cobol85: | |
c906108c | 14706 | default: |
e142c38c | 14707 | cu->language = language_minimal; |
c906108c SS |
14708 | break; |
14709 | } | |
e142c38c | 14710 | cu->language_defn = language_def (cu->language); |
c906108c SS |
14711 | } |
14712 | ||
14713 | /* Return the named attribute or NULL if not there. */ | |
14714 | ||
14715 | static struct attribute * | |
e142c38c | 14716 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 14717 | { |
a48e046c | 14718 | for (;;) |
c906108c | 14719 | { |
a48e046c TT |
14720 | unsigned int i; |
14721 | struct attribute *spec = NULL; | |
14722 | ||
14723 | for (i = 0; i < die->num_attrs; ++i) | |
14724 | { | |
14725 | if (die->attrs[i].name == name) | |
14726 | return &die->attrs[i]; | |
14727 | if (die->attrs[i].name == DW_AT_specification | |
14728 | || die->attrs[i].name == DW_AT_abstract_origin) | |
14729 | spec = &die->attrs[i]; | |
14730 | } | |
14731 | ||
14732 | if (!spec) | |
14733 | break; | |
c906108c | 14734 | |
f2f0e013 | 14735 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 14736 | } |
c5aa993b | 14737 | |
c906108c SS |
14738 | return NULL; |
14739 | } | |
14740 | ||
348e048f DE |
14741 | /* Return the named attribute or NULL if not there, |
14742 | but do not follow DW_AT_specification, etc. | |
14743 | This is for use in contexts where we're reading .debug_types dies. | |
14744 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
14745 | back up the chain, and we want to go down. */ | |
14746 | ||
14747 | static struct attribute * | |
45e58e77 | 14748 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
14749 | { |
14750 | unsigned int i; | |
14751 | ||
14752 | for (i = 0; i < die->num_attrs; ++i) | |
14753 | if (die->attrs[i].name == name) | |
14754 | return &die->attrs[i]; | |
14755 | ||
14756 | return NULL; | |
14757 | } | |
14758 | ||
05cf31d1 JB |
14759 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
14760 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 14761 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
14762 | |
14763 | static int | |
14764 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
14765 | { | |
14766 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
14767 | ||
14768 | return (attr && DW_UNSND (attr)); | |
14769 | } | |
14770 | ||
3ca72b44 | 14771 | static int |
e142c38c | 14772 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 14773 | { |
05cf31d1 JB |
14774 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
14775 | which value is non-zero. However, we have to be careful with | |
14776 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
14777 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
14778 | end up accidently finding a declaration attribute that belongs | |
14779 | to a different DIE referenced by the specification attribute, | |
14780 | even though the given DIE does not have a declaration attribute. */ | |
14781 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
14782 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
14783 | } |
14784 | ||
63d06c5c | 14785 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 14786 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
14787 | containing the return value on output. If there is no |
14788 | specification, but there is an abstract origin, that is | |
14789 | returned. */ | |
63d06c5c DC |
14790 | |
14791 | static struct die_info * | |
f2f0e013 | 14792 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 14793 | { |
f2f0e013 DJ |
14794 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
14795 | *spec_cu); | |
63d06c5c | 14796 | |
edb3359d DJ |
14797 | if (spec_attr == NULL) |
14798 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
14799 | ||
63d06c5c DC |
14800 | if (spec_attr == NULL) |
14801 | return NULL; | |
14802 | else | |
f2f0e013 | 14803 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 14804 | } |
c906108c | 14805 | |
debd256d | 14806 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
14807 | refers to. |
14808 | NOTE: This is also used as a "cleanup" function. */ | |
14809 | ||
debd256d JB |
14810 | static void |
14811 | free_line_header (struct line_header *lh) | |
14812 | { | |
14813 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 14814 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
14815 | |
14816 | /* Remember that all the lh->file_names[i].name pointers are | |
14817 | pointers into debug_line_buffer, and don't need to be freed. */ | |
14818 | if (lh->file_names) | |
a8bc7b56 | 14819 | xfree (lh->file_names); |
debd256d JB |
14820 | |
14821 | /* Similarly for the include directory names. */ | |
14822 | if (lh->include_dirs) | |
a8bc7b56 | 14823 | xfree (lh->include_dirs); |
debd256d | 14824 | |
a8bc7b56 | 14825 | xfree (lh); |
debd256d JB |
14826 | } |
14827 | ||
debd256d | 14828 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 14829 | |
debd256d JB |
14830 | static void |
14831 | add_include_dir (struct line_header *lh, char *include_dir) | |
c906108c | 14832 | { |
debd256d JB |
14833 | /* Grow the array if necessary. */ |
14834 | if (lh->include_dirs_size == 0) | |
c5aa993b | 14835 | { |
debd256d JB |
14836 | lh->include_dirs_size = 1; /* for testing */ |
14837 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
14838 | * sizeof (*lh->include_dirs)); | |
14839 | } | |
14840 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
14841 | { | |
14842 | lh->include_dirs_size *= 2; | |
14843 | lh->include_dirs = xrealloc (lh->include_dirs, | |
14844 | (lh->include_dirs_size | |
14845 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 14846 | } |
c906108c | 14847 | |
debd256d JB |
14848 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
14849 | } | |
6e70227d | 14850 | |
debd256d | 14851 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 14852 | |
debd256d JB |
14853 | static void |
14854 | add_file_name (struct line_header *lh, | |
14855 | char *name, | |
14856 | unsigned int dir_index, | |
14857 | unsigned int mod_time, | |
14858 | unsigned int length) | |
14859 | { | |
14860 | struct file_entry *fe; | |
14861 | ||
14862 | /* Grow the array if necessary. */ | |
14863 | if (lh->file_names_size == 0) | |
14864 | { | |
14865 | lh->file_names_size = 1; /* for testing */ | |
14866 | lh->file_names = xmalloc (lh->file_names_size | |
14867 | * sizeof (*lh->file_names)); | |
14868 | } | |
14869 | else if (lh->num_file_names >= lh->file_names_size) | |
14870 | { | |
14871 | lh->file_names_size *= 2; | |
14872 | lh->file_names = xrealloc (lh->file_names, | |
14873 | (lh->file_names_size | |
14874 | * sizeof (*lh->file_names))); | |
14875 | } | |
14876 | ||
14877 | fe = &lh->file_names[lh->num_file_names++]; | |
14878 | fe->name = name; | |
14879 | fe->dir_index = dir_index; | |
14880 | fe->mod_time = mod_time; | |
14881 | fe->length = length; | |
aaa75496 | 14882 | fe->included_p = 0; |
cb1df416 | 14883 | fe->symtab = NULL; |
debd256d | 14884 | } |
6e70227d | 14885 | |
36586728 TT |
14886 | /* A convenience function to find the proper .debug_line section for a |
14887 | CU. */ | |
14888 | ||
14889 | static struct dwarf2_section_info * | |
14890 | get_debug_line_section (struct dwarf2_cu *cu) | |
14891 | { | |
14892 | struct dwarf2_section_info *section; | |
14893 | ||
14894 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
14895 | DWO file. */ | |
14896 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
14897 | section = &cu->dwo_unit->dwo_file->sections.line; | |
14898 | else if (cu->per_cu->is_dwz) | |
14899 | { | |
14900 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
14901 | ||
14902 | section = &dwz->line; | |
14903 | } | |
14904 | else | |
14905 | section = &dwarf2_per_objfile->line; | |
14906 | ||
14907 | return section; | |
14908 | } | |
14909 | ||
debd256d | 14910 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 14911 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 14912 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
14913 | |
14914 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
14915 | the returned object point into the dwarf line section buffer, |
14916 | and must not be freed. */ | |
ae2de4f8 | 14917 | |
debd256d | 14918 | static struct line_header * |
3019eac3 | 14919 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
14920 | { |
14921 | struct cleanup *back_to; | |
14922 | struct line_header *lh; | |
fe1b8b76 | 14923 | gdb_byte *line_ptr; |
c764a876 | 14924 | unsigned int bytes_read, offset_size; |
debd256d JB |
14925 | int i; |
14926 | char *cur_dir, *cur_file; | |
3019eac3 DE |
14927 | struct dwarf2_section_info *section; |
14928 | bfd *abfd; | |
14929 | ||
36586728 | 14930 | section = get_debug_line_section (cu); |
3019eac3 DE |
14931 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
14932 | if (section->buffer == NULL) | |
debd256d | 14933 | { |
3019eac3 DE |
14934 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
14935 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
14936 | else | |
14937 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
14938 | return 0; |
14939 | } | |
14940 | ||
fceca515 DE |
14941 | /* We can't do this until we know the section is non-empty. |
14942 | Only then do we know we have such a section. */ | |
14943 | abfd = section->asection->owner; | |
14944 | ||
a738430d MK |
14945 | /* Make sure that at least there's room for the total_length field. |
14946 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 14947 | if (offset + 4 >= section->size) |
debd256d | 14948 | { |
4d3c2250 | 14949 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
14950 | return 0; |
14951 | } | |
14952 | ||
14953 | lh = xmalloc (sizeof (*lh)); | |
14954 | memset (lh, 0, sizeof (*lh)); | |
14955 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
14956 | (void *) lh); | |
14957 | ||
3019eac3 | 14958 | line_ptr = section->buffer + offset; |
debd256d | 14959 | |
a738430d | 14960 | /* Read in the header. */ |
6e70227d | 14961 | lh->total_length = |
c764a876 DE |
14962 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
14963 | &bytes_read, &offset_size); | |
debd256d | 14964 | line_ptr += bytes_read; |
3019eac3 | 14965 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 14966 | { |
4d3c2250 | 14967 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
14968 | return 0; |
14969 | } | |
14970 | lh->statement_program_end = line_ptr + lh->total_length; | |
14971 | lh->version = read_2_bytes (abfd, line_ptr); | |
14972 | line_ptr += 2; | |
c764a876 DE |
14973 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
14974 | line_ptr += offset_size; | |
debd256d JB |
14975 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
14976 | line_ptr += 1; | |
2dc7f7b3 TT |
14977 | if (lh->version >= 4) |
14978 | { | |
14979 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
14980 | line_ptr += 1; | |
14981 | } | |
14982 | else | |
14983 | lh->maximum_ops_per_instruction = 1; | |
14984 | ||
14985 | if (lh->maximum_ops_per_instruction == 0) | |
14986 | { | |
14987 | lh->maximum_ops_per_instruction = 1; | |
14988 | complaint (&symfile_complaints, | |
3e43a32a MS |
14989 | _("invalid maximum_ops_per_instruction " |
14990 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
14991 | } |
14992 | ||
debd256d JB |
14993 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
14994 | line_ptr += 1; | |
14995 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
14996 | line_ptr += 1; | |
14997 | lh->line_range = read_1_byte (abfd, line_ptr); | |
14998 | line_ptr += 1; | |
14999 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
15000 | line_ptr += 1; | |
15001 | lh->standard_opcode_lengths | |
fe1b8b76 | 15002 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
15003 | |
15004 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
15005 | for (i = 1; i < lh->opcode_base; ++i) | |
15006 | { | |
15007 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
15008 | line_ptr += 1; | |
15009 | } | |
15010 | ||
a738430d | 15011 | /* Read directory table. */ |
9b1c24c8 | 15012 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15013 | { |
15014 | line_ptr += bytes_read; | |
15015 | add_include_dir (lh, cur_dir); | |
15016 | } | |
15017 | line_ptr += bytes_read; | |
15018 | ||
a738430d | 15019 | /* Read file name table. */ |
9b1c24c8 | 15020 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15021 | { |
15022 | unsigned int dir_index, mod_time, length; | |
15023 | ||
15024 | line_ptr += bytes_read; | |
15025 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15026 | line_ptr += bytes_read; | |
15027 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15028 | line_ptr += bytes_read; | |
15029 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15030 | line_ptr += bytes_read; | |
15031 | ||
15032 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15033 | } | |
15034 | line_ptr += bytes_read; | |
6e70227d | 15035 | lh->statement_program_start = line_ptr; |
debd256d | 15036 | |
3019eac3 | 15037 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 15038 | complaint (&symfile_complaints, |
3e43a32a MS |
15039 | _("line number info header doesn't " |
15040 | "fit in `.debug_line' section")); | |
debd256d JB |
15041 | |
15042 | discard_cleanups (back_to); | |
15043 | return lh; | |
15044 | } | |
c906108c | 15045 | |
c6da4cef DE |
15046 | /* Subroutine of dwarf_decode_lines to simplify it. |
15047 | Return the file name of the psymtab for included file FILE_INDEX | |
15048 | in line header LH of PST. | |
15049 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15050 | If space for the result is malloc'd, it will be freed by a cleanup. | |
15051 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
15052 | ||
15053 | static char * | |
15054 | psymtab_include_file_name (const struct line_header *lh, int file_index, | |
15055 | const struct partial_symtab *pst, | |
15056 | const char *comp_dir) | |
15057 | { | |
15058 | const struct file_entry fe = lh->file_names [file_index]; | |
15059 | char *include_name = fe.name; | |
15060 | char *include_name_to_compare = include_name; | |
15061 | char *dir_name = NULL; | |
72b9f47f TT |
15062 | const char *pst_filename; |
15063 | char *copied_name = NULL; | |
c6da4cef DE |
15064 | int file_is_pst; |
15065 | ||
15066 | if (fe.dir_index) | |
15067 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
15068 | ||
15069 | if (!IS_ABSOLUTE_PATH (include_name) | |
15070 | && (dir_name != NULL || comp_dir != NULL)) | |
15071 | { | |
15072 | /* Avoid creating a duplicate psymtab for PST. | |
15073 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
15074 | Before we do the comparison, however, we need to account | |
15075 | for DIR_NAME and COMP_DIR. | |
15076 | First prepend dir_name (if non-NULL). If we still don't | |
15077 | have an absolute path prepend comp_dir (if non-NULL). | |
15078 | However, the directory we record in the include-file's | |
15079 | psymtab does not contain COMP_DIR (to match the | |
15080 | corresponding symtab(s)). | |
15081 | ||
15082 | Example: | |
15083 | ||
15084 | bash$ cd /tmp | |
15085 | bash$ gcc -g ./hello.c | |
15086 | include_name = "hello.c" | |
15087 | dir_name = "." | |
15088 | DW_AT_comp_dir = comp_dir = "/tmp" | |
15089 | DW_AT_name = "./hello.c" */ | |
15090 | ||
15091 | if (dir_name != NULL) | |
15092 | { | |
15093 | include_name = concat (dir_name, SLASH_STRING, | |
15094 | include_name, (char *)NULL); | |
15095 | include_name_to_compare = include_name; | |
15096 | make_cleanup (xfree, include_name); | |
15097 | } | |
15098 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
15099 | { | |
15100 | include_name_to_compare = concat (comp_dir, SLASH_STRING, | |
15101 | include_name, (char *)NULL); | |
15102 | } | |
15103 | } | |
15104 | ||
15105 | pst_filename = pst->filename; | |
15106 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
15107 | { | |
72b9f47f TT |
15108 | copied_name = concat (pst->dirname, SLASH_STRING, |
15109 | pst_filename, (char *)NULL); | |
15110 | pst_filename = copied_name; | |
c6da4cef DE |
15111 | } |
15112 | ||
1e3fad37 | 15113 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef DE |
15114 | |
15115 | if (include_name_to_compare != include_name) | |
15116 | xfree (include_name_to_compare); | |
72b9f47f TT |
15117 | if (copied_name != NULL) |
15118 | xfree (copied_name); | |
c6da4cef DE |
15119 | |
15120 | if (file_is_pst) | |
15121 | return NULL; | |
15122 | return include_name; | |
15123 | } | |
15124 | ||
c91513d8 PP |
15125 | /* Ignore this record_line request. */ |
15126 | ||
15127 | static void | |
15128 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
15129 | { | |
15130 | return; | |
15131 | } | |
15132 | ||
f3f5162e DE |
15133 | /* Subroutine of dwarf_decode_lines to simplify it. |
15134 | Process the line number information in LH. */ | |
debd256d | 15135 | |
c906108c | 15136 | static void |
f3f5162e DE |
15137 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
15138 | struct dwarf2_cu *cu, struct partial_symtab *pst) | |
c906108c | 15139 | { |
a8c50c1f | 15140 | gdb_byte *line_ptr, *extended_end; |
fe1b8b76 | 15141 | gdb_byte *line_end; |
a8c50c1f | 15142 | unsigned int bytes_read, extended_len; |
c906108c | 15143 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
15144 | CORE_ADDR baseaddr; |
15145 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 15146 | bfd *abfd = objfile->obfd; |
fbf65064 | 15147 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 15148 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 15149 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
15150 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
15151 | = record_line; | |
e142c38c DJ |
15152 | |
15153 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15154 | |
debd256d JB |
15155 | line_ptr = lh->statement_program_start; |
15156 | line_end = lh->statement_program_end; | |
c906108c SS |
15157 | |
15158 | /* Read the statement sequences until there's nothing left. */ | |
15159 | while (line_ptr < line_end) | |
15160 | { | |
15161 | /* state machine registers */ | |
15162 | CORE_ADDR address = 0; | |
15163 | unsigned int file = 1; | |
15164 | unsigned int line = 1; | |
15165 | unsigned int column = 0; | |
debd256d | 15166 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
15167 | int basic_block = 0; |
15168 | int end_sequence = 0; | |
fbf65064 | 15169 | CORE_ADDR addr; |
2dc7f7b3 | 15170 | unsigned char op_index = 0; |
c906108c | 15171 | |
aaa75496 | 15172 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 15173 | { |
aaa75496 | 15174 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
15175 | /* lh->include_dirs and lh->file_names are 0-based, but the |
15176 | directory and file name numbers in the statement program | |
15177 | are 1-based. */ | |
15178 | struct file_entry *fe = &lh->file_names[file - 1]; | |
4f1520fb | 15179 | char *dir = NULL; |
a738430d | 15180 | |
debd256d JB |
15181 | if (fe->dir_index) |
15182 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
15183 | |
15184 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
15185 | } |
15186 | ||
a738430d | 15187 | /* Decode the table. */ |
c5aa993b | 15188 | while (!end_sequence) |
c906108c SS |
15189 | { |
15190 | op_code = read_1_byte (abfd, line_ptr); | |
15191 | line_ptr += 1; | |
59205f5a JB |
15192 | if (line_ptr > line_end) |
15193 | { | |
15194 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
15195 | break; | |
15196 | } | |
9aa1fe7e | 15197 | |
debd256d | 15198 | if (op_code >= lh->opcode_base) |
6e70227d | 15199 | { |
a738430d | 15200 | /* Special operand. */ |
debd256d | 15201 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
15202 | address += (((op_index + (adj_opcode / lh->line_range)) |
15203 | / lh->maximum_ops_per_instruction) | |
15204 | * lh->minimum_instruction_length); | |
15205 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
15206 | % lh->maximum_ops_per_instruction); | |
debd256d | 15207 | line += lh->line_base + (adj_opcode % lh->line_range); |
59205f5a | 15208 | if (lh->num_file_names < file || file == 0) |
25e43795 | 15209 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
15210 | /* For now we ignore lines not starting on an |
15211 | instruction boundary. */ | |
15212 | else if (op_index == 0) | |
25e43795 DJ |
15213 | { |
15214 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 15215 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15216 | { |
15217 | if (last_subfile != current_subfile) | |
15218 | { | |
15219 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15220 | if (last_subfile) | |
c91513d8 | 15221 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15222 | last_subfile = current_subfile; |
15223 | } | |
25e43795 | 15224 | /* Append row to matrix using current values. */ |
7019d805 | 15225 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15226 | (*p_record_line) (current_subfile, line, addr); |
366da635 | 15227 | } |
25e43795 | 15228 | } |
ca5f395d | 15229 | basic_block = 0; |
9aa1fe7e GK |
15230 | } |
15231 | else switch (op_code) | |
c906108c SS |
15232 | { |
15233 | case DW_LNS_extended_op: | |
3e43a32a MS |
15234 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
15235 | &bytes_read); | |
473b7be6 | 15236 | line_ptr += bytes_read; |
a8c50c1f | 15237 | extended_end = line_ptr + extended_len; |
c906108c SS |
15238 | extended_op = read_1_byte (abfd, line_ptr); |
15239 | line_ptr += 1; | |
15240 | switch (extended_op) | |
15241 | { | |
15242 | case DW_LNE_end_sequence: | |
c91513d8 | 15243 | p_record_line = record_line; |
c906108c | 15244 | end_sequence = 1; |
c906108c SS |
15245 | break; |
15246 | case DW_LNE_set_address: | |
e7c27a73 | 15247 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 PP |
15248 | |
15249 | if (address == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15250 | { | |
15251 | /* This line table is for a function which has been | |
15252 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
15253 | ||
15254 | long line_offset | |
36586728 | 15255 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
15256 | |
15257 | complaint (&symfile_complaints, | |
15258 | _(".debug_line address at offset 0x%lx is 0 " | |
15259 | "[in module %s]"), | |
bb5ed363 | 15260 | line_offset, objfile->name); |
c91513d8 PP |
15261 | p_record_line = noop_record_line; |
15262 | } | |
15263 | ||
2dc7f7b3 | 15264 | op_index = 0; |
107d2387 AC |
15265 | line_ptr += bytes_read; |
15266 | address += baseaddr; | |
c906108c SS |
15267 | break; |
15268 | case DW_LNE_define_file: | |
debd256d JB |
15269 | { |
15270 | char *cur_file; | |
15271 | unsigned int dir_index, mod_time, length; | |
6e70227d | 15272 | |
3e43a32a MS |
15273 | cur_file = read_direct_string (abfd, line_ptr, |
15274 | &bytes_read); | |
debd256d JB |
15275 | line_ptr += bytes_read; |
15276 | dir_index = | |
15277 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15278 | line_ptr += bytes_read; | |
15279 | mod_time = | |
15280 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15281 | line_ptr += bytes_read; | |
15282 | length = | |
15283 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15284 | line_ptr += bytes_read; | |
15285 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15286 | } | |
c906108c | 15287 | break; |
d0c6ba3d CC |
15288 | case DW_LNE_set_discriminator: |
15289 | /* The discriminator is not interesting to the debugger; | |
15290 | just ignore it. */ | |
15291 | line_ptr = extended_end; | |
15292 | break; | |
c906108c | 15293 | default: |
4d3c2250 | 15294 | complaint (&symfile_complaints, |
e2e0b3e5 | 15295 | _("mangled .debug_line section")); |
debd256d | 15296 | return; |
c906108c | 15297 | } |
a8c50c1f DJ |
15298 | /* Make sure that we parsed the extended op correctly. If e.g. |
15299 | we expected a different address size than the producer used, | |
15300 | we may have read the wrong number of bytes. */ | |
15301 | if (line_ptr != extended_end) | |
15302 | { | |
15303 | complaint (&symfile_complaints, | |
15304 | _("mangled .debug_line section")); | |
15305 | return; | |
15306 | } | |
c906108c SS |
15307 | break; |
15308 | case DW_LNS_copy: | |
59205f5a | 15309 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15310 | dwarf2_debug_line_missing_file_complaint (); |
15311 | else | |
366da635 | 15312 | { |
25e43795 | 15313 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 15314 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15315 | { |
15316 | if (last_subfile != current_subfile) | |
15317 | { | |
15318 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15319 | if (last_subfile) | |
c91513d8 | 15320 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15321 | last_subfile = current_subfile; |
15322 | } | |
7019d805 | 15323 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15324 | (*p_record_line) (current_subfile, line, addr); |
fbf65064 | 15325 | } |
366da635 | 15326 | } |
c906108c SS |
15327 | basic_block = 0; |
15328 | break; | |
15329 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
15330 | { |
15331 | CORE_ADDR adjust | |
15332 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15333 | ||
15334 | address += (((op_index + adjust) | |
15335 | / lh->maximum_ops_per_instruction) | |
15336 | * lh->minimum_instruction_length); | |
15337 | op_index = ((op_index + adjust) | |
15338 | % lh->maximum_ops_per_instruction); | |
15339 | line_ptr += bytes_read; | |
15340 | } | |
c906108c SS |
15341 | break; |
15342 | case DW_LNS_advance_line: | |
15343 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
15344 | line_ptr += bytes_read; | |
15345 | break; | |
15346 | case DW_LNS_set_file: | |
debd256d | 15347 | { |
a738430d MK |
15348 | /* The arrays lh->include_dirs and lh->file_names are |
15349 | 0-based, but the directory and file name numbers in | |
15350 | the statement program are 1-based. */ | |
debd256d | 15351 | struct file_entry *fe; |
4f1520fb | 15352 | char *dir = NULL; |
a738430d | 15353 | |
debd256d JB |
15354 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
15355 | line_ptr += bytes_read; | |
59205f5a | 15356 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15357 | dwarf2_debug_line_missing_file_complaint (); |
15358 | else | |
15359 | { | |
15360 | fe = &lh->file_names[file - 1]; | |
15361 | if (fe->dir_index) | |
15362 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15363 | if (!decode_for_pst_p) | |
15364 | { | |
15365 | last_subfile = current_subfile; | |
15366 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15367 | } | |
15368 | } | |
debd256d | 15369 | } |
c906108c SS |
15370 | break; |
15371 | case DW_LNS_set_column: | |
15372 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15373 | line_ptr += bytes_read; | |
15374 | break; | |
15375 | case DW_LNS_negate_stmt: | |
15376 | is_stmt = (!is_stmt); | |
15377 | break; | |
15378 | case DW_LNS_set_basic_block: | |
15379 | basic_block = 1; | |
15380 | break; | |
c2c6d25f JM |
15381 | /* Add to the address register of the state machine the |
15382 | address increment value corresponding to special opcode | |
a738430d MK |
15383 | 255. I.e., this value is scaled by the minimum |
15384 | instruction length since special opcode 255 would have | |
b021a221 | 15385 | scaled the increment. */ |
c906108c | 15386 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
15387 | { |
15388 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
15389 | ||
15390 | address += (((op_index + adjust) | |
15391 | / lh->maximum_ops_per_instruction) | |
15392 | * lh->minimum_instruction_length); | |
15393 | op_index = ((op_index + adjust) | |
15394 | % lh->maximum_ops_per_instruction); | |
15395 | } | |
c906108c SS |
15396 | break; |
15397 | case DW_LNS_fixed_advance_pc: | |
15398 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 15399 | op_index = 0; |
c906108c SS |
15400 | line_ptr += 2; |
15401 | break; | |
9aa1fe7e | 15402 | default: |
a738430d MK |
15403 | { |
15404 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 15405 | int i; |
a738430d | 15406 | |
debd256d | 15407 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
15408 | { |
15409 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15410 | line_ptr += bytes_read; | |
15411 | } | |
15412 | } | |
c906108c SS |
15413 | } |
15414 | } | |
59205f5a JB |
15415 | if (lh->num_file_names < file || file == 0) |
15416 | dwarf2_debug_line_missing_file_complaint (); | |
15417 | else | |
15418 | { | |
15419 | lh->file_names[file - 1].included_p = 1; | |
15420 | if (!decode_for_pst_p) | |
fbf65064 UW |
15421 | { |
15422 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
c91513d8 | 15423 | (*p_record_line) (current_subfile, 0, addr); |
fbf65064 | 15424 | } |
59205f5a | 15425 | } |
c906108c | 15426 | } |
f3f5162e DE |
15427 | } |
15428 | ||
15429 | /* Decode the Line Number Program (LNP) for the given line_header | |
15430 | structure and CU. The actual information extracted and the type | |
15431 | of structures created from the LNP depends on the value of PST. | |
15432 | ||
15433 | 1. If PST is NULL, then this procedure uses the data from the program | |
15434 | to create all necessary symbol tables, and their linetables. | |
15435 | ||
15436 | 2. If PST is not NULL, this procedure reads the program to determine | |
15437 | the list of files included by the unit represented by PST, and | |
15438 | builds all the associated partial symbol tables. | |
15439 | ||
15440 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15441 | It is used for relative paths in the line table. | |
15442 | NOTE: When processing partial symtabs (pst != NULL), | |
15443 | comp_dir == pst->dirname. | |
15444 | ||
15445 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
15446 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
15447 | symtab we don't use it in the name of the psymtabs we create. | |
15448 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
15449 | A good testcase for this is mb-inline.exp. */ | |
15450 | ||
15451 | static void | |
15452 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
15453 | struct dwarf2_cu *cu, struct partial_symtab *pst, | |
15454 | int want_line_info) | |
15455 | { | |
15456 | struct objfile *objfile = cu->objfile; | |
15457 | const int decode_for_pst_p = (pst != NULL); | |
15458 | struct subfile *first_subfile = current_subfile; | |
15459 | ||
15460 | if (want_line_info) | |
15461 | dwarf_decode_lines_1 (lh, comp_dir, cu, pst); | |
aaa75496 JB |
15462 | |
15463 | if (decode_for_pst_p) | |
15464 | { | |
15465 | int file_index; | |
15466 | ||
15467 | /* Now that we're done scanning the Line Header Program, we can | |
15468 | create the psymtab of each included file. */ | |
15469 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
15470 | if (lh->file_names[file_index].included_p == 1) | |
15471 | { | |
c6da4cef DE |
15472 | char *include_name = |
15473 | psymtab_include_file_name (lh, file_index, pst, comp_dir); | |
15474 | if (include_name != NULL) | |
aaa75496 JB |
15475 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
15476 | } | |
15477 | } | |
cb1df416 DJ |
15478 | else |
15479 | { | |
15480 | /* Make sure a symtab is created for every file, even files | |
15481 | which contain only variables (i.e. no code with associated | |
15482 | line numbers). */ | |
cb1df416 | 15483 | int i; |
cb1df416 DJ |
15484 | |
15485 | for (i = 0; i < lh->num_file_names; i++) | |
15486 | { | |
15487 | char *dir = NULL; | |
f3f5162e | 15488 | struct file_entry *fe; |
9a619af0 | 15489 | |
cb1df416 DJ |
15490 | fe = &lh->file_names[i]; |
15491 | if (fe->dir_index) | |
15492 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15493 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15494 | ||
15495 | /* Skip the main file; we don't need it, and it must be | |
15496 | allocated last, so that it will show up before the | |
15497 | non-primary symtabs in the objfile's symtab list. */ | |
15498 | if (current_subfile == first_subfile) | |
15499 | continue; | |
15500 | ||
15501 | if (current_subfile->symtab == NULL) | |
15502 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 15503 | objfile); |
cb1df416 DJ |
15504 | fe->symtab = current_subfile->symtab; |
15505 | } | |
15506 | } | |
c906108c SS |
15507 | } |
15508 | ||
15509 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
15510 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
15511 | or NULL if not known. COMP_DIR is the compilation directory for the |
15512 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
15513 | This routine tries to keep line numbers from identical absolute and |
15514 | relative file names in a common subfile. | |
15515 | ||
15516 | Using the `list' example from the GDB testsuite, which resides in | |
15517 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
15518 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
15519 | ||
c5aa993b JM |
15520 | DW_AT_name: /srcdir/list0.c |
15521 | DW_AT_comp_dir: /compdir | |
357e46e7 | 15522 | files.files[0].name: list0.h |
c5aa993b | 15523 | files.files[0].dir: /srcdir |
357e46e7 | 15524 | files.files[1].name: list0.c |
c5aa993b | 15525 | files.files[1].dir: /srcdir |
c906108c SS |
15526 | |
15527 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
15528 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
15529 | start_subfile will ensure that this happens provided that we pass the | |
15530 | concatenation of files.files[1].dir and files.files[1].name as the | |
15531 | subfile's name. */ | |
c906108c SS |
15532 | |
15533 | static void | |
3e43a32a MS |
15534 | dwarf2_start_subfile (char *filename, const char *dirname, |
15535 | const char *comp_dir) | |
c906108c | 15536 | { |
4f1520fb FR |
15537 | char *fullname; |
15538 | ||
15539 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
15540 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
15541 | second argument to start_subfile. To be consistent, we do the | |
15542 | same here. In order not to lose the line information directory, | |
15543 | we concatenate it to the filename when it makes sense. | |
15544 | Note that the Dwarf3 standard says (speaking of filenames in line | |
15545 | information): ``The directory index is ignored for file names | |
15546 | that represent full path names''. Thus ignoring dirname in the | |
15547 | `else' branch below isn't an issue. */ | |
c906108c | 15548 | |
d5166ae1 | 15549 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
4f1520fb FR |
15550 | fullname = concat (dirname, SLASH_STRING, filename, (char *)NULL); |
15551 | else | |
15552 | fullname = filename; | |
c906108c | 15553 | |
4f1520fb FR |
15554 | start_subfile (fullname, comp_dir); |
15555 | ||
15556 | if (fullname != filename) | |
15557 | xfree (fullname); | |
c906108c SS |
15558 | } |
15559 | ||
f4dc4d17 DE |
15560 | /* Start a symtab for DWARF. |
15561 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
15562 | ||
15563 | static void | |
15564 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15565 | char *name, char *comp_dir, CORE_ADDR low_pc) | |
15566 | { | |
15567 | start_symtab (name, comp_dir, low_pc); | |
15568 | record_debugformat ("DWARF 2"); | |
15569 | record_producer (cu->producer); | |
15570 | ||
15571 | /* We assume that we're processing GCC output. */ | |
15572 | processing_gcc_compilation = 2; | |
15573 | ||
15574 | processing_has_namespace_info = 0; | |
15575 | } | |
15576 | ||
4c2df51b DJ |
15577 | static void |
15578 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 15579 | struct dwarf2_cu *cu) |
4c2df51b | 15580 | { |
e7c27a73 DJ |
15581 | struct objfile *objfile = cu->objfile; |
15582 | struct comp_unit_head *cu_header = &cu->header; | |
15583 | ||
4c2df51b DJ |
15584 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
15585 | code here to turn a symbol with DW_AT_external and a | |
15586 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
15587 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
15588 | with some versions of binutils) where shared libraries could have | |
15589 | relocations against symbols in their debug information - the | |
15590 | minimal symbol would have the right address, but the debug info | |
15591 | would not. It's no longer necessary, because we will explicitly | |
15592 | apply relocations when we read in the debug information now. */ | |
15593 | ||
15594 | /* A DW_AT_location attribute with no contents indicates that a | |
15595 | variable has been optimized away. */ | |
15596 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
15597 | { | |
15598 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
15599 | return; | |
15600 | } | |
15601 | ||
15602 | /* Handle one degenerate form of location expression specially, to | |
15603 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
15604 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
15605 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
15606 | |
15607 | if (attr_form_is_block (attr) | |
3019eac3 DE |
15608 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
15609 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
15610 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
15611 | && (DW_BLOCK (attr)->size | |
15612 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 15613 | { |
891d2f0b | 15614 | unsigned int dummy; |
4c2df51b | 15615 | |
3019eac3 DE |
15616 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
15617 | SYMBOL_VALUE_ADDRESS (sym) = | |
15618 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
15619 | else | |
15620 | SYMBOL_VALUE_ADDRESS (sym) = | |
15621 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
907fc202 | 15622 | SYMBOL_CLASS (sym) = LOC_STATIC; |
4c2df51b DJ |
15623 | fixup_symbol_section (sym, objfile); |
15624 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
15625 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
15626 | return; |
15627 | } | |
15628 | ||
15629 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
15630 | expression evaluator, and use LOC_COMPUTED only when necessary | |
15631 | (i.e. when the value of a register or memory location is | |
15632 | referenced, or a thread-local block, etc.). Then again, it might | |
15633 | not be worthwhile. I'm assuming that it isn't unless performance | |
15634 | or memory numbers show me otherwise. */ | |
15635 | ||
e7c27a73 | 15636 | dwarf2_symbol_mark_computed (attr, sym, cu); |
4c2df51b | 15637 | SYMBOL_CLASS (sym) = LOC_COMPUTED; |
8be455d7 JK |
15638 | |
15639 | if (SYMBOL_COMPUTED_OPS (sym) == &dwarf2_loclist_funcs) | |
15640 | cu->has_loclist = 1; | |
4c2df51b DJ |
15641 | } |
15642 | ||
c906108c SS |
15643 | /* Given a pointer to a DWARF information entry, figure out if we need |
15644 | to make a symbol table entry for it, and if so, create a new entry | |
15645 | and return a pointer to it. | |
15646 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
15647 | used the passed type. |
15648 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
15649 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
15650 | |
15651 | static struct symbol * | |
34eaf542 TT |
15652 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
15653 | struct symbol *space) | |
c906108c | 15654 | { |
e7c27a73 | 15655 | struct objfile *objfile = cu->objfile; |
c906108c SS |
15656 | struct symbol *sym = NULL; |
15657 | char *name; | |
15658 | struct attribute *attr = NULL; | |
15659 | struct attribute *attr2 = NULL; | |
e142c38c | 15660 | CORE_ADDR baseaddr; |
e37fd15a SW |
15661 | struct pending **list_to_add = NULL; |
15662 | ||
edb3359d | 15663 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
15664 | |
15665 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15666 | |
94af9270 | 15667 | name = dwarf2_name (die, cu); |
c906108c SS |
15668 | if (name) |
15669 | { | |
94af9270 | 15670 | const char *linkagename; |
34eaf542 | 15671 | int suppress_add = 0; |
94af9270 | 15672 | |
34eaf542 TT |
15673 | if (space) |
15674 | sym = space; | |
15675 | else | |
15676 | sym = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol); | |
c906108c | 15677 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
15678 | |
15679 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
33e5013e | 15680 | SYMBOL_SET_LANGUAGE (sym, cu->language); |
94af9270 KS |
15681 | linkagename = dwarf2_physname (name, die, cu); |
15682 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 15683 | |
f55ee35c JK |
15684 | /* Fortran does not have mangling standard and the mangling does differ |
15685 | between gfortran, iFort etc. */ | |
15686 | if (cu->language == language_fortran | |
b250c185 | 15687 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d SW |
15688 | symbol_set_demangled_name (&(sym->ginfo), |
15689 | (char *) dwarf2_full_name (name, die, cu), | |
15690 | NULL); | |
f55ee35c | 15691 | |
c906108c | 15692 | /* Default assumptions. |
c5aa993b | 15693 | Use the passed type or decode it from the die. */ |
176620f1 | 15694 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
875dc2fc | 15695 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
15696 | if (type != NULL) |
15697 | SYMBOL_TYPE (sym) = type; | |
15698 | else | |
e7c27a73 | 15699 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
15700 | attr = dwarf2_attr (die, |
15701 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
15702 | cu); | |
c906108c SS |
15703 | if (attr) |
15704 | { | |
15705 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
15706 | } | |
cb1df416 | 15707 | |
edb3359d DJ |
15708 | attr = dwarf2_attr (die, |
15709 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
15710 | cu); | |
cb1df416 DJ |
15711 | if (attr) |
15712 | { | |
15713 | int file_index = DW_UNSND (attr); | |
9a619af0 | 15714 | |
cb1df416 DJ |
15715 | if (cu->line_header == NULL |
15716 | || file_index > cu->line_header->num_file_names) | |
15717 | complaint (&symfile_complaints, | |
15718 | _("file index out of range")); | |
1c3d648d | 15719 | else if (file_index > 0) |
cb1df416 DJ |
15720 | { |
15721 | struct file_entry *fe; | |
9a619af0 | 15722 | |
cb1df416 DJ |
15723 | fe = &cu->line_header->file_names[file_index - 1]; |
15724 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
15725 | } | |
15726 | } | |
15727 | ||
c906108c SS |
15728 | switch (die->tag) |
15729 | { | |
15730 | case DW_TAG_label: | |
e142c38c | 15731 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c SS |
15732 | if (attr) |
15733 | { | |
15734 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; | |
15735 | } | |
0f5238ed TT |
15736 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
15737 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
c906108c | 15738 | SYMBOL_CLASS (sym) = LOC_LABEL; |
0f5238ed | 15739 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
15740 | break; |
15741 | case DW_TAG_subprogram: | |
15742 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
15743 | finish_block. */ | |
15744 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
e142c38c | 15745 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
15746 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
15747 | || cu->language == language_ada) | |
c906108c | 15748 | { |
2cfa0c8d JB |
15749 | /* Subprograms marked external are stored as a global symbol. |
15750 | Ada subprograms, whether marked external or not, are always | |
15751 | stored as a global symbol, because we want to be able to | |
15752 | access them globally. For instance, we want to be able | |
15753 | to break on a nested subprogram without having to | |
15754 | specify the context. */ | |
e37fd15a | 15755 | list_to_add = &global_symbols; |
c906108c SS |
15756 | } |
15757 | else | |
15758 | { | |
e37fd15a | 15759 | list_to_add = cu->list_in_scope; |
c906108c SS |
15760 | } |
15761 | break; | |
edb3359d DJ |
15762 | case DW_TAG_inlined_subroutine: |
15763 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
15764 | finish_block. */ | |
15765 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
15766 | SYMBOL_INLINED (sym) = 1; | |
481860b3 | 15767 | list_to_add = cu->list_in_scope; |
edb3359d | 15768 | break; |
34eaf542 TT |
15769 | case DW_TAG_template_value_param: |
15770 | suppress_add = 1; | |
15771 | /* Fall through. */ | |
72929c62 | 15772 | case DW_TAG_constant: |
c906108c | 15773 | case DW_TAG_variable: |
254e6b9e | 15774 | case DW_TAG_member: |
0963b4bd MS |
15775 | /* Compilation with minimal debug info may result in |
15776 | variables with missing type entries. Change the | |
15777 | misleading `void' type to something sensible. */ | |
c906108c | 15778 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 15779 | SYMBOL_TYPE (sym) |
46bf5051 | 15780 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 15781 | |
e142c38c | 15782 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
15783 | /* In the case of DW_TAG_member, we should only be called for |
15784 | static const members. */ | |
15785 | if (die->tag == DW_TAG_member) | |
15786 | { | |
3863f96c DE |
15787 | /* dwarf2_add_field uses die_is_declaration, |
15788 | so we do the same. */ | |
254e6b9e DE |
15789 | gdb_assert (die_is_declaration (die, cu)); |
15790 | gdb_assert (attr); | |
15791 | } | |
c906108c SS |
15792 | if (attr) |
15793 | { | |
e7c27a73 | 15794 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 15795 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 15796 | if (!suppress_add) |
34eaf542 TT |
15797 | { |
15798 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 15799 | list_to_add = &global_symbols; |
34eaf542 | 15800 | else |
e37fd15a | 15801 | list_to_add = cu->list_in_scope; |
34eaf542 | 15802 | } |
c906108c SS |
15803 | break; |
15804 | } | |
e142c38c | 15805 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
15806 | if (attr) |
15807 | { | |
e7c27a73 | 15808 | var_decode_location (attr, sym, cu); |
e142c38c | 15809 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
15810 | |
15811 | /* Fortran explicitly imports any global symbols to the local | |
15812 | scope by DW_TAG_common_block. */ | |
15813 | if (cu->language == language_fortran && die->parent | |
15814 | && die->parent->tag == DW_TAG_common_block) | |
15815 | attr2 = NULL; | |
15816 | ||
caac4577 JG |
15817 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
15818 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
15819 | && !dwarf2_per_objfile->has_section_at_zero) | |
15820 | { | |
15821 | /* When a static variable is eliminated by the linker, | |
15822 | the corresponding debug information is not stripped | |
15823 | out, but the variable address is set to null; | |
15824 | do not add such variables into symbol table. */ | |
15825 | } | |
15826 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 15827 | { |
f55ee35c JK |
15828 | /* Workaround gfortran PR debug/40040 - it uses |
15829 | DW_AT_location for variables in -fPIC libraries which may | |
15830 | get overriden by other libraries/executable and get | |
15831 | a different address. Resolve it by the minimal symbol | |
15832 | which may come from inferior's executable using copy | |
15833 | relocation. Make this workaround only for gfortran as for | |
15834 | other compilers GDB cannot guess the minimal symbol | |
15835 | Fortran mangling kind. */ | |
15836 | if (cu->language == language_fortran && die->parent | |
15837 | && die->parent->tag == DW_TAG_module | |
15838 | && cu->producer | |
15839 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
15840 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; | |
15841 | ||
1c809c68 TT |
15842 | /* A variable with DW_AT_external is never static, |
15843 | but it may be block-scoped. */ | |
15844 | list_to_add = (cu->list_in_scope == &file_symbols | |
15845 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 15846 | } |
c906108c | 15847 | else |
e37fd15a | 15848 | list_to_add = cu->list_in_scope; |
c906108c SS |
15849 | } |
15850 | else | |
15851 | { | |
15852 | /* We do not know the address of this symbol. | |
c5aa993b JM |
15853 | If it is an external symbol and we have type information |
15854 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
15855 | The address of the variable will then be determined from | |
15856 | the minimal symbol table whenever the variable is | |
15857 | referenced. */ | |
e142c38c | 15858 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
15859 | |
15860 | /* Fortran explicitly imports any global symbols to the local | |
15861 | scope by DW_TAG_common_block. */ | |
15862 | if (cu->language == language_fortran && die->parent | |
15863 | && die->parent->tag == DW_TAG_common_block) | |
15864 | { | |
15865 | /* SYMBOL_CLASS doesn't matter here because | |
15866 | read_common_block is going to reset it. */ | |
15867 | if (!suppress_add) | |
15868 | list_to_add = cu->list_in_scope; | |
15869 | } | |
15870 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
15871 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 15872 | { |
0fe7935b DJ |
15873 | /* A variable with DW_AT_external is never static, but it |
15874 | may be block-scoped. */ | |
15875 | list_to_add = (cu->list_in_scope == &file_symbols | |
15876 | ? &global_symbols : cu->list_in_scope); | |
15877 | ||
c906108c | 15878 | SYMBOL_CLASS (sym) = LOC_UNRESOLVED; |
c906108c | 15879 | } |
442ddf59 JK |
15880 | else if (!die_is_declaration (die, cu)) |
15881 | { | |
15882 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
15883 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
15884 | if (!suppress_add) |
15885 | list_to_add = cu->list_in_scope; | |
442ddf59 | 15886 | } |
c906108c SS |
15887 | } |
15888 | break; | |
15889 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
15890 | /* If we are inside a function, mark this as an argument. If |
15891 | not, we might be looking at an argument to an inlined function | |
15892 | when we do not have enough information to show inlined frames; | |
15893 | pretend it's a local variable in that case so that the user can | |
15894 | still see it. */ | |
15895 | if (context_stack_depth > 0 | |
15896 | && context_stack[context_stack_depth - 1].name != NULL) | |
15897 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 15898 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
15899 | if (attr) |
15900 | { | |
e7c27a73 | 15901 | var_decode_location (attr, sym, cu); |
c906108c | 15902 | } |
e142c38c | 15903 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
15904 | if (attr) |
15905 | { | |
e7c27a73 | 15906 | dwarf2_const_value (attr, sym, cu); |
c906108c | 15907 | } |
f346a30d | 15908 | |
e37fd15a | 15909 | list_to_add = cu->list_in_scope; |
c906108c SS |
15910 | break; |
15911 | case DW_TAG_unspecified_parameters: | |
15912 | /* From varargs functions; gdb doesn't seem to have any | |
15913 | interest in this information, so just ignore it for now. | |
15914 | (FIXME?) */ | |
15915 | break; | |
34eaf542 TT |
15916 | case DW_TAG_template_type_param: |
15917 | suppress_add = 1; | |
15918 | /* Fall through. */ | |
c906108c | 15919 | case DW_TAG_class_type: |
680b30c7 | 15920 | case DW_TAG_interface_type: |
c906108c SS |
15921 | case DW_TAG_structure_type: |
15922 | case DW_TAG_union_type: | |
72019c9c | 15923 | case DW_TAG_set_type: |
c906108c SS |
15924 | case DW_TAG_enumeration_type: |
15925 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 15926 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 15927 | |
63d06c5c | 15928 | { |
987504bb | 15929 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
15930 | really ever be static objects: otherwise, if you try |
15931 | to, say, break of a class's method and you're in a file | |
15932 | which doesn't mention that class, it won't work unless | |
15933 | the check for all static symbols in lookup_symbol_aux | |
15934 | saves you. See the OtherFileClass tests in | |
15935 | gdb.c++/namespace.exp. */ | |
15936 | ||
e37fd15a | 15937 | if (!suppress_add) |
34eaf542 | 15938 | { |
34eaf542 TT |
15939 | list_to_add = (cu->list_in_scope == &file_symbols |
15940 | && (cu->language == language_cplus | |
15941 | || cu->language == language_java) | |
15942 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 15943 | |
64382290 TT |
15944 | /* The semantics of C++ state that "struct foo { |
15945 | ... }" also defines a typedef for "foo". A Java | |
15946 | class declaration also defines a typedef for the | |
15947 | class. */ | |
15948 | if (cu->language == language_cplus | |
15949 | || cu->language == language_java | |
15950 | || cu->language == language_ada) | |
15951 | { | |
15952 | /* The symbol's name is already allocated along | |
15953 | with this objfile, so we don't need to | |
15954 | duplicate it for the type. */ | |
15955 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
15956 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
15957 | } | |
63d06c5c DC |
15958 | } |
15959 | } | |
c906108c SS |
15960 | break; |
15961 | case DW_TAG_typedef: | |
63d06c5c DC |
15962 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
15963 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; | |
e37fd15a | 15964 | list_to_add = cu->list_in_scope; |
63d06c5c | 15965 | break; |
c906108c | 15966 | case DW_TAG_base_type: |
a02abb62 | 15967 | case DW_TAG_subrange_type: |
c906108c | 15968 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
176620f1 | 15969 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 15970 | list_to_add = cu->list_in_scope; |
c906108c SS |
15971 | break; |
15972 | case DW_TAG_enumerator: | |
e142c38c | 15973 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
15974 | if (attr) |
15975 | { | |
e7c27a73 | 15976 | dwarf2_const_value (attr, sym, cu); |
c906108c | 15977 | } |
63d06c5c DC |
15978 | { |
15979 | /* NOTE: carlton/2003-11-10: See comment above in the | |
15980 | DW_TAG_class_type, etc. block. */ | |
15981 | ||
e142c38c | 15982 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
15983 | && (cu->language == language_cplus |
15984 | || cu->language == language_java) | |
e142c38c | 15985 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 15986 | } |
c906108c | 15987 | break; |
5c4e30ca DC |
15988 | case DW_TAG_namespace: |
15989 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
e37fd15a | 15990 | list_to_add = &global_symbols; |
5c4e30ca | 15991 | break; |
4357ac6c TT |
15992 | case DW_TAG_common_block: |
15993 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
15994 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; | |
15995 | add_symbol_to_list (sym, cu->list_in_scope); | |
15996 | break; | |
c906108c SS |
15997 | default: |
15998 | /* Not a tag we recognize. Hopefully we aren't processing | |
15999 | trash data, but since we must specifically ignore things | |
16000 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 16001 | this point. */ |
e2e0b3e5 | 16002 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 16003 | dwarf_tag_name (die->tag)); |
c906108c SS |
16004 | break; |
16005 | } | |
df8a16a1 | 16006 | |
e37fd15a SW |
16007 | if (suppress_add) |
16008 | { | |
16009 | sym->hash_next = objfile->template_symbols; | |
16010 | objfile->template_symbols = sym; | |
16011 | list_to_add = NULL; | |
16012 | } | |
16013 | ||
16014 | if (list_to_add != NULL) | |
16015 | add_symbol_to_list (sym, list_to_add); | |
16016 | ||
df8a16a1 DJ |
16017 | /* For the benefit of old versions of GCC, check for anonymous |
16018 | namespaces based on the demangled name. */ | |
16019 | if (!processing_has_namespace_info | |
94af9270 | 16020 | && cu->language == language_cplus) |
a10964d1 | 16021 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
16022 | } |
16023 | return (sym); | |
16024 | } | |
16025 | ||
34eaf542 TT |
16026 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
16027 | ||
16028 | static struct symbol * | |
16029 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
16030 | { | |
16031 | return new_symbol_full (die, type, cu, NULL); | |
16032 | } | |
16033 | ||
98bfdba5 PA |
16034 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
16035 | zero-extend it as appropriate for the symbol's type. The DWARF | |
16036 | standard (v4) is not entirely clear about the meaning of using | |
16037 | DW_FORM_dataN for a constant with a signed type, where the type is | |
16038 | wider than the data. The conclusion of a discussion on the DWARF | |
16039 | list was that this is unspecified. We choose to always zero-extend | |
16040 | because that is the interpretation long in use by GCC. */ | |
c906108c | 16041 | |
98bfdba5 PA |
16042 | static gdb_byte * |
16043 | dwarf2_const_value_data (struct attribute *attr, struct type *type, | |
16044 | const char *name, struct obstack *obstack, | |
12df843f | 16045 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 16046 | { |
e7c27a73 | 16047 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
16048 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
16049 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
16050 | LONGEST l = DW_UNSND (attr); |
16051 | ||
16052 | if (bits < sizeof (*value) * 8) | |
16053 | { | |
16054 | l &= ((LONGEST) 1 << bits) - 1; | |
16055 | *value = l; | |
16056 | } | |
16057 | else if (bits == sizeof (*value) * 8) | |
16058 | *value = l; | |
16059 | else | |
16060 | { | |
16061 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
16062 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
16063 | return bytes; | |
16064 | } | |
16065 | ||
16066 | return NULL; | |
16067 | } | |
16068 | ||
16069 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
16070 | the value does not fit in *VALUE, set *BYTES - either already | |
16071 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
16072 | or, set *BATON, if we translated the constant to a location | |
16073 | expression. */ | |
16074 | ||
16075 | static void | |
16076 | dwarf2_const_value_attr (struct attribute *attr, struct type *type, | |
16077 | const char *name, struct obstack *obstack, | |
16078 | struct dwarf2_cu *cu, | |
12df843f | 16079 | LONGEST *value, gdb_byte **bytes, |
98bfdba5 PA |
16080 | struct dwarf2_locexpr_baton **baton) |
16081 | { | |
16082 | struct objfile *objfile = cu->objfile; | |
16083 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 16084 | struct dwarf_block *blk; |
98bfdba5 PA |
16085 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
16086 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
16087 | ||
16088 | *value = 0; | |
16089 | *bytes = NULL; | |
16090 | *baton = NULL; | |
c906108c SS |
16091 | |
16092 | switch (attr->form) | |
16093 | { | |
16094 | case DW_FORM_addr: | |
3019eac3 | 16095 | case DW_FORM_GNU_addr_index: |
ac56253d | 16096 | { |
ac56253d TT |
16097 | gdb_byte *data; |
16098 | ||
98bfdba5 PA |
16099 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
16100 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 16101 | cu_header->addr_size, |
98bfdba5 | 16102 | TYPE_LENGTH (type)); |
ac56253d TT |
16103 | /* Symbols of this form are reasonably rare, so we just |
16104 | piggyback on the existing location code rather than writing | |
16105 | a new implementation of symbol_computed_ops. */ | |
98bfdba5 PA |
16106 | *baton = obstack_alloc (&objfile->objfile_obstack, |
16107 | sizeof (struct dwarf2_locexpr_baton)); | |
16108 | (*baton)->per_cu = cu->per_cu; | |
16109 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 16110 | |
98bfdba5 PA |
16111 | (*baton)->size = 2 + cu_header->addr_size; |
16112 | data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size); | |
16113 | (*baton)->data = data; | |
ac56253d TT |
16114 | |
16115 | data[0] = DW_OP_addr; | |
16116 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
16117 | byte_order, DW_ADDR (attr)); | |
16118 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 16119 | } |
c906108c | 16120 | break; |
4ac36638 | 16121 | case DW_FORM_string: |
93b5768b | 16122 | case DW_FORM_strp: |
3019eac3 | 16123 | case DW_FORM_GNU_str_index: |
36586728 | 16124 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
16125 | /* DW_STRING is already allocated on the objfile obstack, point |
16126 | directly to it. */ | |
16127 | *bytes = (gdb_byte *) DW_STRING (attr); | |
93b5768b | 16128 | break; |
c906108c SS |
16129 | case DW_FORM_block1: |
16130 | case DW_FORM_block2: | |
16131 | case DW_FORM_block4: | |
16132 | case DW_FORM_block: | |
2dc7f7b3 | 16133 | case DW_FORM_exprloc: |
c906108c | 16134 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
16135 | if (TYPE_LENGTH (type) != blk->size) |
16136 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
16137 | TYPE_LENGTH (type)); | |
16138 | *bytes = blk->data; | |
c906108c | 16139 | break; |
2df3850c JM |
16140 | |
16141 | /* The DW_AT_const_value attributes are supposed to carry the | |
16142 | symbol's value "represented as it would be on the target | |
16143 | architecture." By the time we get here, it's already been | |
16144 | converted to host endianness, so we just need to sign- or | |
16145 | zero-extend it as appropriate. */ | |
16146 | case DW_FORM_data1: | |
3e43a32a MS |
16147 | *bytes = dwarf2_const_value_data (attr, type, name, |
16148 | obstack, cu, value, 8); | |
2df3850c | 16149 | break; |
c906108c | 16150 | case DW_FORM_data2: |
3e43a32a MS |
16151 | *bytes = dwarf2_const_value_data (attr, type, name, |
16152 | obstack, cu, value, 16); | |
2df3850c | 16153 | break; |
c906108c | 16154 | case DW_FORM_data4: |
3e43a32a MS |
16155 | *bytes = dwarf2_const_value_data (attr, type, name, |
16156 | obstack, cu, value, 32); | |
2df3850c | 16157 | break; |
c906108c | 16158 | case DW_FORM_data8: |
3e43a32a MS |
16159 | *bytes = dwarf2_const_value_data (attr, type, name, |
16160 | obstack, cu, value, 64); | |
2df3850c JM |
16161 | break; |
16162 | ||
c906108c | 16163 | case DW_FORM_sdata: |
98bfdba5 | 16164 | *value = DW_SND (attr); |
2df3850c JM |
16165 | break; |
16166 | ||
c906108c | 16167 | case DW_FORM_udata: |
98bfdba5 | 16168 | *value = DW_UNSND (attr); |
c906108c | 16169 | break; |
2df3850c | 16170 | |
c906108c | 16171 | default: |
4d3c2250 | 16172 | complaint (&symfile_complaints, |
e2e0b3e5 | 16173 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 16174 | dwarf_form_name (attr->form)); |
98bfdba5 | 16175 | *value = 0; |
c906108c SS |
16176 | break; |
16177 | } | |
16178 | } | |
16179 | ||
2df3850c | 16180 | |
98bfdba5 PA |
16181 | /* Copy constant value from an attribute to a symbol. */ |
16182 | ||
2df3850c | 16183 | static void |
98bfdba5 PA |
16184 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
16185 | struct dwarf2_cu *cu) | |
2df3850c | 16186 | { |
98bfdba5 PA |
16187 | struct objfile *objfile = cu->objfile; |
16188 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 16189 | LONGEST value; |
98bfdba5 PA |
16190 | gdb_byte *bytes; |
16191 | struct dwarf2_locexpr_baton *baton; | |
2df3850c | 16192 | |
98bfdba5 PA |
16193 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
16194 | SYMBOL_PRINT_NAME (sym), | |
16195 | &objfile->objfile_obstack, cu, | |
16196 | &value, &bytes, &baton); | |
2df3850c | 16197 | |
98bfdba5 PA |
16198 | if (baton != NULL) |
16199 | { | |
16200 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs; | |
16201 | SYMBOL_LOCATION_BATON (sym) = baton; | |
16202 | SYMBOL_CLASS (sym) = LOC_COMPUTED; | |
16203 | } | |
16204 | else if (bytes != NULL) | |
16205 | { | |
16206 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
16207 | SYMBOL_CLASS (sym) = LOC_CONST_BYTES; | |
16208 | } | |
16209 | else | |
16210 | { | |
16211 | SYMBOL_VALUE (sym) = value; | |
16212 | SYMBOL_CLASS (sym) = LOC_CONST; | |
16213 | } | |
2df3850c JM |
16214 | } |
16215 | ||
c906108c SS |
16216 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
16217 | ||
16218 | static struct type * | |
e7c27a73 | 16219 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16220 | { |
c906108c | 16221 | struct attribute *type_attr; |
c906108c | 16222 | |
e142c38c | 16223 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
16224 | if (!type_attr) |
16225 | { | |
16226 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 16227 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 16228 | } |
348e048f | 16229 | |
673bfd45 | 16230 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16231 | } |
16232 | ||
b4ba55a1 JB |
16233 | /* True iff CU's producer generates GNAT Ada auxiliary information |
16234 | that allows to find parallel types through that information instead | |
16235 | of having to do expensive parallel lookups by type name. */ | |
16236 | ||
16237 | static int | |
16238 | need_gnat_info (struct dwarf2_cu *cu) | |
16239 | { | |
16240 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
16241 | of GNAT produces this auxiliary information, without any indication | |
16242 | that it is produced. Part of enhancing the FSF version of GNAT | |
16243 | to produce that information will be to put in place an indicator | |
16244 | that we can use in order to determine whether the descriptive type | |
16245 | info is available or not. One suggestion that has been made is | |
16246 | to use a new attribute, attached to the CU die. For now, assume | |
16247 | that the descriptive type info is not available. */ | |
16248 | return 0; | |
16249 | } | |
16250 | ||
b4ba55a1 JB |
16251 | /* Return the auxiliary type of the die in question using its |
16252 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
16253 | attribute is not present. */ | |
16254 | ||
16255 | static struct type * | |
16256 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
16257 | { | |
b4ba55a1 | 16258 | struct attribute *type_attr; |
b4ba55a1 JB |
16259 | |
16260 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
16261 | if (!type_attr) | |
16262 | return NULL; | |
16263 | ||
673bfd45 | 16264 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
16265 | } |
16266 | ||
16267 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
16268 | descriptive type accordingly. */ | |
16269 | ||
16270 | static void | |
16271 | set_descriptive_type (struct type *type, struct die_info *die, | |
16272 | struct dwarf2_cu *cu) | |
16273 | { | |
16274 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
16275 | ||
16276 | if (descriptive_type) | |
16277 | { | |
16278 | ALLOCATE_GNAT_AUX_TYPE (type); | |
16279 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
16280 | } | |
16281 | } | |
16282 | ||
c906108c SS |
16283 | /* Return the containing type of the die in question using its |
16284 | DW_AT_containing_type attribute. */ | |
16285 | ||
16286 | static struct type * | |
e7c27a73 | 16287 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16288 | { |
c906108c | 16289 | struct attribute *type_attr; |
c906108c | 16290 | |
e142c38c | 16291 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
16292 | if (!type_attr) |
16293 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
16294 | "[in module %s]"), cu->objfile->name); | |
16295 | ||
673bfd45 | 16296 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16297 | } |
16298 | ||
673bfd45 DE |
16299 | /* Look up the type of DIE in CU using its type attribute ATTR. |
16300 | If there is no type substitute an error marker. */ | |
16301 | ||
c906108c | 16302 | static struct type * |
673bfd45 DE |
16303 | lookup_die_type (struct die_info *die, struct attribute *attr, |
16304 | struct dwarf2_cu *cu) | |
c906108c | 16305 | { |
bb5ed363 | 16306 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
16307 | struct type *this_type; |
16308 | ||
673bfd45 DE |
16309 | /* First see if we have it cached. */ |
16310 | ||
36586728 TT |
16311 | if (attr->form == DW_FORM_GNU_ref_alt) |
16312 | { | |
16313 | struct dwarf2_per_cu_data *per_cu; | |
16314 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
16315 | ||
16316 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
16317 | this_type = get_die_type_at_offset (offset, per_cu); | |
16318 | } | |
16319 | else if (is_ref_attr (attr)) | |
673bfd45 | 16320 | { |
b64f50a1 | 16321 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
16322 | |
16323 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
16324 | } | |
55f1336d | 16325 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 DE |
16326 | { |
16327 | struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr); | |
673bfd45 DE |
16328 | |
16329 | /* sig_type will be NULL if the signatured type is missing from | |
16330 | the debug info. */ | |
16331 | if (sig_type == NULL) | |
16332 | error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE " | |
16333 | "at 0x%x [in module %s]"), | |
b64f50a1 | 16334 | die->offset.sect_off, objfile->name); |
673bfd45 | 16335 | |
3019eac3 DE |
16336 | gdb_assert (sig_type->per_cu.is_debug_types); |
16337 | /* If we haven't filled in type_offset_in_section yet, then we | |
16338 | haven't read the type in yet. */ | |
16339 | this_type = NULL; | |
16340 | if (sig_type->type_offset_in_section.sect_off != 0) | |
16341 | { | |
16342 | this_type = | |
16343 | get_die_type_at_offset (sig_type->type_offset_in_section, | |
16344 | &sig_type->per_cu); | |
16345 | } | |
673bfd45 DE |
16346 | } |
16347 | else | |
16348 | { | |
16349 | dump_die_for_error (die); | |
16350 | error (_("Dwarf Error: Bad type attribute %s [in module %s]"), | |
bb5ed363 | 16351 | dwarf_attr_name (attr->name), objfile->name); |
673bfd45 DE |
16352 | } |
16353 | ||
16354 | /* If not cached we need to read it in. */ | |
16355 | ||
16356 | if (this_type == NULL) | |
16357 | { | |
16358 | struct die_info *type_die; | |
16359 | struct dwarf2_cu *type_cu = cu; | |
16360 | ||
16361 | type_die = follow_die_ref_or_sig (die, attr, &type_cu); | |
3019eac3 DE |
16362 | /* If we found the type now, it's probably because the type came |
16363 | from an inter-CU reference and the type's CU got expanded before | |
16364 | ours. */ | |
16365 | this_type = get_die_type (type_die, type_cu); | |
16366 | if (this_type == NULL) | |
16367 | this_type = read_type_die_1 (type_die, type_cu); | |
673bfd45 DE |
16368 | } |
16369 | ||
16370 | /* If we still don't have a type use an error marker. */ | |
16371 | ||
16372 | if (this_type == NULL) | |
c906108c | 16373 | { |
b00fdb78 TT |
16374 | char *message, *saved; |
16375 | ||
16376 | /* read_type_die already issued a complaint. */ | |
16377 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
bb5ed363 | 16378 | objfile->name, |
b64f50a1 JK |
16379 | cu->header.offset.sect_off, |
16380 | die->offset.sect_off); | |
bb5ed363 | 16381 | saved = obstack_copy0 (&objfile->objfile_obstack, |
b00fdb78 TT |
16382 | message, strlen (message)); |
16383 | xfree (message); | |
16384 | ||
bb5ed363 | 16385 | this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); |
c906108c | 16386 | } |
673bfd45 | 16387 | |
f792889a | 16388 | return this_type; |
c906108c SS |
16389 | } |
16390 | ||
673bfd45 DE |
16391 | /* Return the type in DIE, CU. |
16392 | Returns NULL for invalid types. | |
16393 | ||
16394 | This first does a lookup in the appropriate type_hash table, | |
16395 | and only reads the die in if necessary. | |
16396 | ||
16397 | NOTE: This can be called when reading in partial or full symbols. */ | |
16398 | ||
f792889a | 16399 | static struct type * |
e7c27a73 | 16400 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16401 | { |
f792889a DJ |
16402 | struct type *this_type; |
16403 | ||
16404 | this_type = get_die_type (die, cu); | |
16405 | if (this_type) | |
16406 | return this_type; | |
16407 | ||
673bfd45 DE |
16408 | return read_type_die_1 (die, cu); |
16409 | } | |
16410 | ||
16411 | /* Read the type in DIE, CU. | |
16412 | Returns NULL for invalid types. */ | |
16413 | ||
16414 | static struct type * | |
16415 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
16416 | { | |
16417 | struct type *this_type = NULL; | |
16418 | ||
c906108c SS |
16419 | switch (die->tag) |
16420 | { | |
16421 | case DW_TAG_class_type: | |
680b30c7 | 16422 | case DW_TAG_interface_type: |
c906108c SS |
16423 | case DW_TAG_structure_type: |
16424 | case DW_TAG_union_type: | |
f792889a | 16425 | this_type = read_structure_type (die, cu); |
c906108c SS |
16426 | break; |
16427 | case DW_TAG_enumeration_type: | |
f792889a | 16428 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
16429 | break; |
16430 | case DW_TAG_subprogram: | |
16431 | case DW_TAG_subroutine_type: | |
edb3359d | 16432 | case DW_TAG_inlined_subroutine: |
f792889a | 16433 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
16434 | break; |
16435 | case DW_TAG_array_type: | |
f792889a | 16436 | this_type = read_array_type (die, cu); |
c906108c | 16437 | break; |
72019c9c | 16438 | case DW_TAG_set_type: |
f792889a | 16439 | this_type = read_set_type (die, cu); |
72019c9c | 16440 | break; |
c906108c | 16441 | case DW_TAG_pointer_type: |
f792889a | 16442 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
16443 | break; |
16444 | case DW_TAG_ptr_to_member_type: | |
f792889a | 16445 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
16446 | break; |
16447 | case DW_TAG_reference_type: | |
f792889a | 16448 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
16449 | break; |
16450 | case DW_TAG_const_type: | |
f792889a | 16451 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
16452 | break; |
16453 | case DW_TAG_volatile_type: | |
f792889a | 16454 | this_type = read_tag_volatile_type (die, cu); |
c906108c SS |
16455 | break; |
16456 | case DW_TAG_string_type: | |
f792889a | 16457 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
16458 | break; |
16459 | case DW_TAG_typedef: | |
f792889a | 16460 | this_type = read_typedef (die, cu); |
c906108c | 16461 | break; |
a02abb62 | 16462 | case DW_TAG_subrange_type: |
f792889a | 16463 | this_type = read_subrange_type (die, cu); |
a02abb62 | 16464 | break; |
c906108c | 16465 | case DW_TAG_base_type: |
f792889a | 16466 | this_type = read_base_type (die, cu); |
c906108c | 16467 | break; |
81a17f79 | 16468 | case DW_TAG_unspecified_type: |
f792889a | 16469 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 16470 | break; |
0114d602 DJ |
16471 | case DW_TAG_namespace: |
16472 | this_type = read_namespace_type (die, cu); | |
16473 | break; | |
f55ee35c JK |
16474 | case DW_TAG_module: |
16475 | this_type = read_module_type (die, cu); | |
16476 | break; | |
c906108c | 16477 | default: |
3e43a32a MS |
16478 | complaint (&symfile_complaints, |
16479 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 16480 | dwarf_tag_name (die->tag)); |
c906108c SS |
16481 | break; |
16482 | } | |
63d06c5c | 16483 | |
f792889a | 16484 | return this_type; |
63d06c5c DC |
16485 | } |
16486 | ||
abc72ce4 DE |
16487 | /* See if we can figure out if the class lives in a namespace. We do |
16488 | this by looking for a member function; its demangled name will | |
16489 | contain namespace info, if there is any. | |
16490 | Return the computed name or NULL. | |
16491 | Space for the result is allocated on the objfile's obstack. | |
16492 | This is the full-die version of guess_partial_die_structure_name. | |
16493 | In this case we know DIE has no useful parent. */ | |
16494 | ||
16495 | static char * | |
16496 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
16497 | { | |
16498 | struct die_info *spec_die; | |
16499 | struct dwarf2_cu *spec_cu; | |
16500 | struct die_info *child; | |
16501 | ||
16502 | spec_cu = cu; | |
16503 | spec_die = die_specification (die, &spec_cu); | |
16504 | if (spec_die != NULL) | |
16505 | { | |
16506 | die = spec_die; | |
16507 | cu = spec_cu; | |
16508 | } | |
16509 | ||
16510 | for (child = die->child; | |
16511 | child != NULL; | |
16512 | child = child->sibling) | |
16513 | { | |
16514 | if (child->tag == DW_TAG_subprogram) | |
16515 | { | |
16516 | struct attribute *attr; | |
16517 | ||
16518 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
16519 | if (attr == NULL) | |
16520 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
16521 | if (attr != NULL) | |
16522 | { | |
16523 | char *actual_name | |
16524 | = language_class_name_from_physname (cu->language_defn, | |
16525 | DW_STRING (attr)); | |
16526 | char *name = NULL; | |
16527 | ||
16528 | if (actual_name != NULL) | |
16529 | { | |
16530 | char *die_name = dwarf2_name (die, cu); | |
16531 | ||
16532 | if (die_name != NULL | |
16533 | && strcmp (die_name, actual_name) != 0) | |
16534 | { | |
16535 | /* Strip off the class name from the full name. | |
16536 | We want the prefix. */ | |
16537 | int die_name_len = strlen (die_name); | |
16538 | int actual_name_len = strlen (actual_name); | |
16539 | ||
16540 | /* Test for '::' as a sanity check. */ | |
16541 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
16542 | && actual_name[actual_name_len |
16543 | - die_name_len - 1] == ':') | |
abc72ce4 DE |
16544 | name = |
16545 | obsavestring (actual_name, | |
16546 | actual_name_len - die_name_len - 2, | |
16547 | &cu->objfile->objfile_obstack); | |
16548 | } | |
16549 | } | |
16550 | xfree (actual_name); | |
16551 | return name; | |
16552 | } | |
16553 | } | |
16554 | } | |
16555 | ||
16556 | return NULL; | |
16557 | } | |
16558 | ||
96408a79 SA |
16559 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
16560 | prefix part in such case. See | |
16561 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16562 | ||
16563 | static char * | |
16564 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
16565 | { | |
16566 | struct attribute *attr; | |
16567 | char *base; | |
16568 | ||
16569 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
16570 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
16571 | return NULL; | |
16572 | ||
16573 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
16574 | if (attr != NULL && DW_STRING (attr) != NULL) | |
16575 | return NULL; | |
16576 | ||
16577 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
16578 | if (attr == NULL) | |
16579 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
16580 | if (attr == NULL || DW_STRING (attr) == NULL) | |
16581 | return NULL; | |
16582 | ||
16583 | /* dwarf2_name had to be already called. */ | |
16584 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
16585 | ||
16586 | /* Strip the base name, keep any leading namespaces/classes. */ | |
16587 | base = strrchr (DW_STRING (attr), ':'); | |
16588 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
16589 | return ""; | |
16590 | ||
16591 | return obsavestring (DW_STRING (attr), &base[-1] - DW_STRING (attr), | |
16592 | &cu->objfile->objfile_obstack); | |
16593 | } | |
16594 | ||
fdde2d81 | 16595 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 16596 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 16597 | |
0114d602 DJ |
16598 | For example, if we're within the method foo() in the following |
16599 | code: | |
16600 | ||
16601 | namespace N { | |
16602 | class C { | |
16603 | void foo () { | |
16604 | } | |
16605 | }; | |
16606 | } | |
16607 | ||
16608 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 16609 | |
0d5cff50 | 16610 | static const char * |
e142c38c | 16611 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 16612 | { |
0114d602 DJ |
16613 | struct die_info *parent, *spec_die; |
16614 | struct dwarf2_cu *spec_cu; | |
16615 | struct type *parent_type; | |
96408a79 | 16616 | char *retval; |
63d06c5c | 16617 | |
f55ee35c JK |
16618 | if (cu->language != language_cplus && cu->language != language_java |
16619 | && cu->language != language_fortran) | |
0114d602 DJ |
16620 | return ""; |
16621 | ||
96408a79 SA |
16622 | retval = anonymous_struct_prefix (die, cu); |
16623 | if (retval) | |
16624 | return retval; | |
16625 | ||
0114d602 DJ |
16626 | /* We have to be careful in the presence of DW_AT_specification. |
16627 | For example, with GCC 3.4, given the code | |
16628 | ||
16629 | namespace N { | |
16630 | void foo() { | |
16631 | // Definition of N::foo. | |
16632 | } | |
16633 | } | |
16634 | ||
16635 | then we'll have a tree of DIEs like this: | |
16636 | ||
16637 | 1: DW_TAG_compile_unit | |
16638 | 2: DW_TAG_namespace // N | |
16639 | 3: DW_TAG_subprogram // declaration of N::foo | |
16640 | 4: DW_TAG_subprogram // definition of N::foo | |
16641 | DW_AT_specification // refers to die #3 | |
16642 | ||
16643 | Thus, when processing die #4, we have to pretend that we're in | |
16644 | the context of its DW_AT_specification, namely the contex of die | |
16645 | #3. */ | |
16646 | spec_cu = cu; | |
16647 | spec_die = die_specification (die, &spec_cu); | |
16648 | if (spec_die == NULL) | |
16649 | parent = die->parent; | |
16650 | else | |
63d06c5c | 16651 | { |
0114d602 DJ |
16652 | parent = spec_die->parent; |
16653 | cu = spec_cu; | |
63d06c5c | 16654 | } |
0114d602 DJ |
16655 | |
16656 | if (parent == NULL) | |
16657 | return ""; | |
98bfdba5 PA |
16658 | else if (parent->building_fullname) |
16659 | { | |
16660 | const char *name; | |
16661 | const char *parent_name; | |
16662 | ||
16663 | /* It has been seen on RealView 2.2 built binaries, | |
16664 | DW_TAG_template_type_param types actually _defined_ as | |
16665 | children of the parent class: | |
16666 | ||
16667 | enum E {}; | |
16668 | template class <class Enum> Class{}; | |
16669 | Class<enum E> class_e; | |
16670 | ||
16671 | 1: DW_TAG_class_type (Class) | |
16672 | 2: DW_TAG_enumeration_type (E) | |
16673 | 3: DW_TAG_enumerator (enum1:0) | |
16674 | 3: DW_TAG_enumerator (enum2:1) | |
16675 | ... | |
16676 | 2: DW_TAG_template_type_param | |
16677 | DW_AT_type DW_FORM_ref_udata (E) | |
16678 | ||
16679 | Besides being broken debug info, it can put GDB into an | |
16680 | infinite loop. Consider: | |
16681 | ||
16682 | When we're building the full name for Class<E>, we'll start | |
16683 | at Class, and go look over its template type parameters, | |
16684 | finding E. We'll then try to build the full name of E, and | |
16685 | reach here. We're now trying to build the full name of E, | |
16686 | and look over the parent DIE for containing scope. In the | |
16687 | broken case, if we followed the parent DIE of E, we'd again | |
16688 | find Class, and once again go look at its template type | |
16689 | arguments, etc., etc. Simply don't consider such parent die | |
16690 | as source-level parent of this die (it can't be, the language | |
16691 | doesn't allow it), and break the loop here. */ | |
16692 | name = dwarf2_name (die, cu); | |
16693 | parent_name = dwarf2_name (parent, cu); | |
16694 | complaint (&symfile_complaints, | |
16695 | _("template param type '%s' defined within parent '%s'"), | |
16696 | name ? name : "<unknown>", | |
16697 | parent_name ? parent_name : "<unknown>"); | |
16698 | return ""; | |
16699 | } | |
63d06c5c | 16700 | else |
0114d602 DJ |
16701 | switch (parent->tag) |
16702 | { | |
63d06c5c | 16703 | case DW_TAG_namespace: |
0114d602 | 16704 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
16705 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
16706 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
16707 | Work around this problem here. */ | |
16708 | if (cu->language == language_cplus | |
16709 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
16710 | return ""; | |
0114d602 DJ |
16711 | /* We give a name to even anonymous namespaces. */ |
16712 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 16713 | case DW_TAG_class_type: |
680b30c7 | 16714 | case DW_TAG_interface_type: |
63d06c5c | 16715 | case DW_TAG_structure_type: |
0114d602 | 16716 | case DW_TAG_union_type: |
f55ee35c | 16717 | case DW_TAG_module: |
0114d602 DJ |
16718 | parent_type = read_type_die (parent, cu); |
16719 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
16720 | return TYPE_TAG_NAME (parent_type); | |
16721 | else | |
16722 | /* An anonymous structure is only allowed non-static data | |
16723 | members; no typedefs, no member functions, et cetera. | |
16724 | So it does not need a prefix. */ | |
16725 | return ""; | |
abc72ce4 | 16726 | case DW_TAG_compile_unit: |
95554aad | 16727 | case DW_TAG_partial_unit: |
abc72ce4 DE |
16728 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
16729 | if (cu->language == language_cplus | |
8b70b953 | 16730 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
16731 | && die->child != NULL |
16732 | && (die->tag == DW_TAG_class_type | |
16733 | || die->tag == DW_TAG_structure_type | |
16734 | || die->tag == DW_TAG_union_type)) | |
16735 | { | |
16736 | char *name = guess_full_die_structure_name (die, cu); | |
16737 | if (name != NULL) | |
16738 | return name; | |
16739 | } | |
16740 | return ""; | |
63d06c5c | 16741 | default: |
8176b9b8 | 16742 | return determine_prefix (parent, cu); |
63d06c5c | 16743 | } |
63d06c5c DC |
16744 | } |
16745 | ||
3e43a32a MS |
16746 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
16747 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
16748 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
16749 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
16750 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 16751 | |
f55ee35c | 16752 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
16753 | |
16754 | static char * | |
f55ee35c JK |
16755 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
16756 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 16757 | { |
f55ee35c | 16758 | const char *lead = ""; |
5c315b68 | 16759 | const char *sep; |
63d06c5c | 16760 | |
3e43a32a MS |
16761 | if (suffix == NULL || suffix[0] == '\0' |
16762 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
16763 | sep = ""; |
16764 | else if (cu->language == language_java) | |
16765 | sep = "."; | |
f55ee35c JK |
16766 | else if (cu->language == language_fortran && physname) |
16767 | { | |
16768 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
16769 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
16770 | ||
16771 | lead = "__"; | |
16772 | sep = "_MOD_"; | |
16773 | } | |
987504bb JJ |
16774 | else |
16775 | sep = "::"; | |
63d06c5c | 16776 | |
6dd47d34 DE |
16777 | if (prefix == NULL) |
16778 | prefix = ""; | |
16779 | if (suffix == NULL) | |
16780 | suffix = ""; | |
16781 | ||
987504bb JJ |
16782 | if (obs == NULL) |
16783 | { | |
3e43a32a MS |
16784 | char *retval |
16785 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 16786 | |
f55ee35c JK |
16787 | strcpy (retval, lead); |
16788 | strcat (retval, prefix); | |
6dd47d34 DE |
16789 | strcat (retval, sep); |
16790 | strcat (retval, suffix); | |
63d06c5c DC |
16791 | return retval; |
16792 | } | |
987504bb JJ |
16793 | else |
16794 | { | |
16795 | /* We have an obstack. */ | |
f55ee35c | 16796 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 16797 | } |
63d06c5c DC |
16798 | } |
16799 | ||
c906108c SS |
16800 | /* Return sibling of die, NULL if no sibling. */ |
16801 | ||
f9aca02d | 16802 | static struct die_info * |
fba45db2 | 16803 | sibling_die (struct die_info *die) |
c906108c | 16804 | { |
639d11d3 | 16805 | return die->sibling; |
c906108c SS |
16806 | } |
16807 | ||
71c25dea TT |
16808 | /* Get name of a die, return NULL if not found. */ |
16809 | ||
16810 | static char * | |
16811 | dwarf2_canonicalize_name (char *name, struct dwarf2_cu *cu, | |
16812 | struct obstack *obstack) | |
16813 | { | |
16814 | if (name && cu->language == language_cplus) | |
16815 | { | |
16816 | char *canon_name = cp_canonicalize_string (name); | |
16817 | ||
16818 | if (canon_name != NULL) | |
16819 | { | |
16820 | if (strcmp (canon_name, name) != 0) | |
16821 | name = obsavestring (canon_name, strlen (canon_name), | |
16822 | obstack); | |
16823 | xfree (canon_name); | |
16824 | } | |
16825 | } | |
16826 | ||
16827 | return name; | |
c906108c SS |
16828 | } |
16829 | ||
9219021c DC |
16830 | /* Get name of a die, return NULL if not found. */ |
16831 | ||
16832 | static char * | |
e142c38c | 16833 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
16834 | { |
16835 | struct attribute *attr; | |
16836 | ||
e142c38c | 16837 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
16838 | if ((!attr || !DW_STRING (attr)) |
16839 | && die->tag != DW_TAG_class_type | |
16840 | && die->tag != DW_TAG_interface_type | |
16841 | && die->tag != DW_TAG_structure_type | |
16842 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
16843 | return NULL; |
16844 | ||
16845 | switch (die->tag) | |
16846 | { | |
16847 | case DW_TAG_compile_unit: | |
95554aad | 16848 | case DW_TAG_partial_unit: |
71c25dea TT |
16849 | /* Compilation units have a DW_AT_name that is a filename, not |
16850 | a source language identifier. */ | |
16851 | case DW_TAG_enumeration_type: | |
16852 | case DW_TAG_enumerator: | |
16853 | /* These tags always have simple identifiers already; no need | |
16854 | to canonicalize them. */ | |
16855 | return DW_STRING (attr); | |
907af001 | 16856 | |
418835cc KS |
16857 | case DW_TAG_subprogram: |
16858 | /* Java constructors will all be named "<init>", so return | |
16859 | the class name when we see this special case. */ | |
16860 | if (cu->language == language_java | |
16861 | && DW_STRING (attr) != NULL | |
16862 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
16863 | { | |
16864 | struct dwarf2_cu *spec_cu = cu; | |
16865 | struct die_info *spec_die; | |
16866 | ||
16867 | /* GCJ will output '<init>' for Java constructor names. | |
16868 | For this special case, return the name of the parent class. */ | |
16869 | ||
16870 | /* GCJ may output suprogram DIEs with AT_specification set. | |
16871 | If so, use the name of the specified DIE. */ | |
16872 | spec_die = die_specification (die, &spec_cu); | |
16873 | if (spec_die != NULL) | |
16874 | return dwarf2_name (spec_die, spec_cu); | |
16875 | ||
16876 | do | |
16877 | { | |
16878 | die = die->parent; | |
16879 | if (die->tag == DW_TAG_class_type) | |
16880 | return dwarf2_name (die, cu); | |
16881 | } | |
95554aad TT |
16882 | while (die->tag != DW_TAG_compile_unit |
16883 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 16884 | } |
907af001 UW |
16885 | break; |
16886 | ||
16887 | case DW_TAG_class_type: | |
16888 | case DW_TAG_interface_type: | |
16889 | case DW_TAG_structure_type: | |
16890 | case DW_TAG_union_type: | |
16891 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
16892 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
16893 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
16894 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
16895 | if (attr && DW_STRING (attr) |
16896 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
16897 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 16898 | return NULL; |
53832f31 TT |
16899 | |
16900 | /* GCC might emit a nameless typedef that has a linkage name. See | |
16901 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16902 | if (!attr || DW_STRING (attr) == NULL) | |
16903 | { | |
df5c6c50 | 16904 | char *demangled = NULL; |
53832f31 TT |
16905 | |
16906 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
16907 | if (attr == NULL) | |
16908 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
16909 | ||
16910 | if (attr == NULL || DW_STRING (attr) == NULL) | |
16911 | return NULL; | |
16912 | ||
df5c6c50 JK |
16913 | /* Avoid demangling DW_STRING (attr) the second time on a second |
16914 | call for the same DIE. */ | |
16915 | if (!DW_STRING_IS_CANONICAL (attr)) | |
16916 | demangled = cplus_demangle (DW_STRING (attr), DMGL_TYPES); | |
53832f31 TT |
16917 | |
16918 | if (demangled) | |
16919 | { | |
96408a79 SA |
16920 | char *base; |
16921 | ||
53832f31 | 16922 | /* FIXME: we already did this for the partial symbol... */ |
96408a79 SA |
16923 | DW_STRING (attr) = obsavestring (demangled, strlen (demangled), |
16924 | &cu->objfile->objfile_obstack); | |
53832f31 TT |
16925 | DW_STRING_IS_CANONICAL (attr) = 1; |
16926 | xfree (demangled); | |
96408a79 SA |
16927 | |
16928 | /* Strip any leading namespaces/classes, keep only the base name. | |
16929 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
16930 | base = strrchr (DW_STRING (attr), ':'); | |
16931 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
16932 | return &base[1]; | |
16933 | else | |
16934 | return DW_STRING (attr); | |
53832f31 TT |
16935 | } |
16936 | } | |
907af001 UW |
16937 | break; |
16938 | ||
71c25dea | 16939 | default: |
907af001 UW |
16940 | break; |
16941 | } | |
16942 | ||
16943 | if (!DW_STRING_IS_CANONICAL (attr)) | |
16944 | { | |
16945 | DW_STRING (attr) | |
16946 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
16947 | &cu->objfile->objfile_obstack); | |
16948 | DW_STRING_IS_CANONICAL (attr) = 1; | |
71c25dea | 16949 | } |
907af001 | 16950 | return DW_STRING (attr); |
9219021c DC |
16951 | } |
16952 | ||
16953 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
16954 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
16955 | containing the return value on output. */ | |
9219021c DC |
16956 | |
16957 | static struct die_info * | |
f2f0e013 | 16958 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
16959 | { |
16960 | struct attribute *attr; | |
9219021c | 16961 | |
f2f0e013 | 16962 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
16963 | if (attr == NULL) |
16964 | return NULL; | |
16965 | ||
f2f0e013 | 16966 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
16967 | } |
16968 | ||
c906108c SS |
16969 | /* Convert a DIE tag into its string name. */ |
16970 | ||
f39c6ffd | 16971 | static const char * |
aa1ee363 | 16972 | dwarf_tag_name (unsigned tag) |
c906108c | 16973 | { |
f39c6ffd TT |
16974 | const char *name = get_DW_TAG_name (tag); |
16975 | ||
16976 | if (name == NULL) | |
16977 | return "DW_TAG_<unknown>"; | |
16978 | ||
16979 | return name; | |
c906108c SS |
16980 | } |
16981 | ||
16982 | /* Convert a DWARF attribute code into its string name. */ | |
16983 | ||
f39c6ffd | 16984 | static const char * |
aa1ee363 | 16985 | dwarf_attr_name (unsigned attr) |
c906108c | 16986 | { |
f39c6ffd TT |
16987 | const char *name; |
16988 | ||
c764a876 | 16989 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
16990 | if (attr == DW_AT_MIPS_fde) |
16991 | return "DW_AT_MIPS_fde"; | |
16992 | #else | |
16993 | if (attr == DW_AT_HP_block_index) | |
16994 | return "DW_AT_HP_block_index"; | |
c764a876 | 16995 | #endif |
f39c6ffd TT |
16996 | |
16997 | name = get_DW_AT_name (attr); | |
16998 | ||
16999 | if (name == NULL) | |
17000 | return "DW_AT_<unknown>"; | |
17001 | ||
17002 | return name; | |
c906108c SS |
17003 | } |
17004 | ||
17005 | /* Convert a DWARF value form code into its string name. */ | |
17006 | ||
f39c6ffd | 17007 | static const char * |
aa1ee363 | 17008 | dwarf_form_name (unsigned form) |
c906108c | 17009 | { |
f39c6ffd TT |
17010 | const char *name = get_DW_FORM_name (form); |
17011 | ||
17012 | if (name == NULL) | |
17013 | return "DW_FORM_<unknown>"; | |
17014 | ||
17015 | return name; | |
c906108c SS |
17016 | } |
17017 | ||
17018 | static char * | |
fba45db2 | 17019 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
17020 | { |
17021 | if (mybool) | |
17022 | return "TRUE"; | |
17023 | else | |
17024 | return "FALSE"; | |
17025 | } | |
17026 | ||
17027 | /* Convert a DWARF type code into its string name. */ | |
17028 | ||
f39c6ffd | 17029 | static const char * |
aa1ee363 | 17030 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 17031 | { |
f39c6ffd | 17032 | const char *name = get_DW_ATE_name (enc); |
c906108c | 17033 | |
f39c6ffd TT |
17034 | if (name == NULL) |
17035 | return "DW_ATE_<unknown>"; | |
c906108c | 17036 | |
f39c6ffd | 17037 | return name; |
c906108c | 17038 | } |
c906108c | 17039 | |
f9aca02d | 17040 | static void |
d97bc12b | 17041 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
17042 | { |
17043 | unsigned int i; | |
17044 | ||
d97bc12b DE |
17045 | print_spaces (indent, f); |
17046 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 17047 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
17048 | |
17049 | if (die->parent != NULL) | |
17050 | { | |
17051 | print_spaces (indent, f); | |
17052 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 17053 | die->parent->offset.sect_off); |
d97bc12b DE |
17054 | } |
17055 | ||
17056 | print_spaces (indent, f); | |
17057 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 17058 | dwarf_bool_name (die->child != NULL)); |
c906108c | 17059 | |
d97bc12b DE |
17060 | print_spaces (indent, f); |
17061 | fprintf_unfiltered (f, " attributes:\n"); | |
17062 | ||
c906108c SS |
17063 | for (i = 0; i < die->num_attrs; ++i) |
17064 | { | |
d97bc12b DE |
17065 | print_spaces (indent, f); |
17066 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
17067 | dwarf_attr_name (die->attrs[i].name), |
17068 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 17069 | |
c906108c SS |
17070 | switch (die->attrs[i].form) |
17071 | { | |
c906108c | 17072 | case DW_FORM_addr: |
3019eac3 | 17073 | case DW_FORM_GNU_addr_index: |
d97bc12b | 17074 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 17075 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
17076 | break; |
17077 | case DW_FORM_block2: | |
17078 | case DW_FORM_block4: | |
17079 | case DW_FORM_block: | |
17080 | case DW_FORM_block1: | |
56eb65bd SP |
17081 | fprintf_unfiltered (f, "block: size %s", |
17082 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 17083 | break; |
2dc7f7b3 | 17084 | case DW_FORM_exprloc: |
56eb65bd SP |
17085 | fprintf_unfiltered (f, "expression: size %s", |
17086 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 17087 | break; |
4568ecf9 DE |
17088 | case DW_FORM_ref_addr: |
17089 | fprintf_unfiltered (f, "ref address: "); | |
17090 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17091 | break; | |
36586728 TT |
17092 | case DW_FORM_GNU_ref_alt: |
17093 | fprintf_unfiltered (f, "alt ref address: "); | |
17094 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17095 | break; | |
10b3939b DJ |
17096 | case DW_FORM_ref1: |
17097 | case DW_FORM_ref2: | |
17098 | case DW_FORM_ref4: | |
4568ecf9 DE |
17099 | case DW_FORM_ref8: |
17100 | case DW_FORM_ref_udata: | |
d97bc12b | 17101 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 17102 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 17103 | break; |
c906108c SS |
17104 | case DW_FORM_data1: |
17105 | case DW_FORM_data2: | |
17106 | case DW_FORM_data4: | |
ce5d95e1 | 17107 | case DW_FORM_data8: |
c906108c SS |
17108 | case DW_FORM_udata: |
17109 | case DW_FORM_sdata: | |
43bbcdc2 PH |
17110 | fprintf_unfiltered (f, "constant: %s", |
17111 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 17112 | break; |
2dc7f7b3 TT |
17113 | case DW_FORM_sec_offset: |
17114 | fprintf_unfiltered (f, "section offset: %s", | |
17115 | pulongest (DW_UNSND (&die->attrs[i]))); | |
17116 | break; | |
55f1336d | 17117 | case DW_FORM_ref_sig8: |
348e048f DE |
17118 | if (DW_SIGNATURED_TYPE (&die->attrs[i]) != NULL) |
17119 | fprintf_unfiltered (f, "signatured type, offset: 0x%x", | |
b64f50a1 | 17120 | DW_SIGNATURED_TYPE (&die->attrs[i])->per_cu.offset.sect_off); |
348e048f DE |
17121 | else |
17122 | fprintf_unfiltered (f, "signatured type, offset: unknown"); | |
17123 | break; | |
c906108c | 17124 | case DW_FORM_string: |
4bdf3d34 | 17125 | case DW_FORM_strp: |
3019eac3 | 17126 | case DW_FORM_GNU_str_index: |
36586728 | 17127 | case DW_FORM_GNU_strp_alt: |
8285870a | 17128 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 17129 | DW_STRING (&die->attrs[i]) |
8285870a JK |
17130 | ? DW_STRING (&die->attrs[i]) : "", |
17131 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
17132 | break; |
17133 | case DW_FORM_flag: | |
17134 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 17135 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 17136 | else |
d97bc12b | 17137 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 17138 | break; |
2dc7f7b3 TT |
17139 | case DW_FORM_flag_present: |
17140 | fprintf_unfiltered (f, "flag: TRUE"); | |
17141 | break; | |
a8329558 | 17142 | case DW_FORM_indirect: |
0963b4bd MS |
17143 | /* The reader will have reduced the indirect form to |
17144 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
17145 | fprintf_unfiltered (f, |
17146 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 17147 | break; |
c906108c | 17148 | default: |
d97bc12b | 17149 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 17150 | die->attrs[i].form); |
d97bc12b | 17151 | break; |
c906108c | 17152 | } |
d97bc12b | 17153 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
17154 | } |
17155 | } | |
17156 | ||
f9aca02d | 17157 | static void |
d97bc12b | 17158 | dump_die_for_error (struct die_info *die) |
c906108c | 17159 | { |
d97bc12b DE |
17160 | dump_die_shallow (gdb_stderr, 0, die); |
17161 | } | |
17162 | ||
17163 | static void | |
17164 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
17165 | { | |
17166 | int indent = level * 4; | |
17167 | ||
17168 | gdb_assert (die != NULL); | |
17169 | ||
17170 | if (level >= max_level) | |
17171 | return; | |
17172 | ||
17173 | dump_die_shallow (f, indent, die); | |
17174 | ||
17175 | if (die->child != NULL) | |
c906108c | 17176 | { |
d97bc12b DE |
17177 | print_spaces (indent, f); |
17178 | fprintf_unfiltered (f, " Children:"); | |
17179 | if (level + 1 < max_level) | |
17180 | { | |
17181 | fprintf_unfiltered (f, "\n"); | |
17182 | dump_die_1 (f, level + 1, max_level, die->child); | |
17183 | } | |
17184 | else | |
17185 | { | |
3e43a32a MS |
17186 | fprintf_unfiltered (f, |
17187 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
17188 | } |
17189 | } | |
17190 | ||
17191 | if (die->sibling != NULL && level > 0) | |
17192 | { | |
17193 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
17194 | } |
17195 | } | |
17196 | ||
d97bc12b DE |
17197 | /* This is called from the pdie macro in gdbinit.in. |
17198 | It's not static so gcc will keep a copy callable from gdb. */ | |
17199 | ||
17200 | void | |
17201 | dump_die (struct die_info *die, int max_level) | |
17202 | { | |
17203 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
17204 | } | |
17205 | ||
f9aca02d | 17206 | static void |
51545339 | 17207 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17208 | { |
51545339 | 17209 | void **slot; |
c906108c | 17210 | |
b64f50a1 JK |
17211 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
17212 | INSERT); | |
51545339 DJ |
17213 | |
17214 | *slot = die; | |
c906108c SS |
17215 | } |
17216 | ||
b64f50a1 JK |
17217 | /* DW_ADDR is always stored already as sect_offset; despite for the forms |
17218 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
17219 | ||
93311388 DE |
17220 | static int |
17221 | is_ref_attr (struct attribute *attr) | |
c906108c | 17222 | { |
c906108c SS |
17223 | switch (attr->form) |
17224 | { | |
17225 | case DW_FORM_ref_addr: | |
c906108c SS |
17226 | case DW_FORM_ref1: |
17227 | case DW_FORM_ref2: | |
17228 | case DW_FORM_ref4: | |
613e1657 | 17229 | case DW_FORM_ref8: |
c906108c | 17230 | case DW_FORM_ref_udata: |
36586728 | 17231 | case DW_FORM_GNU_ref_alt: |
93311388 | 17232 | return 1; |
c906108c | 17233 | default: |
93311388 | 17234 | return 0; |
c906108c | 17235 | } |
93311388 DE |
17236 | } |
17237 | ||
b64f50a1 JK |
17238 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
17239 | required kind. */ | |
17240 | ||
17241 | static sect_offset | |
93311388 DE |
17242 | dwarf2_get_ref_die_offset (struct attribute *attr) |
17243 | { | |
4568ecf9 | 17244 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 17245 | |
93311388 | 17246 | if (is_ref_attr (attr)) |
b64f50a1 | 17247 | return retval; |
93311388 | 17248 | |
b64f50a1 | 17249 | retval.sect_off = 0; |
93311388 DE |
17250 | complaint (&symfile_complaints, |
17251 | _("unsupported die ref attribute form: '%s'"), | |
17252 | dwarf_form_name (attr->form)); | |
b64f50a1 | 17253 | return retval; |
c906108c SS |
17254 | } |
17255 | ||
43bbcdc2 PH |
17256 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
17257 | * the value held by the attribute is not constant. */ | |
a02abb62 | 17258 | |
43bbcdc2 | 17259 | static LONGEST |
a02abb62 JB |
17260 | dwarf2_get_attr_constant_value (struct attribute *attr, int default_value) |
17261 | { | |
17262 | if (attr->form == DW_FORM_sdata) | |
17263 | return DW_SND (attr); | |
17264 | else if (attr->form == DW_FORM_udata | |
17265 | || attr->form == DW_FORM_data1 | |
17266 | || attr->form == DW_FORM_data2 | |
17267 | || attr->form == DW_FORM_data4 | |
17268 | || attr->form == DW_FORM_data8) | |
17269 | return DW_UNSND (attr); | |
17270 | else | |
17271 | { | |
3e43a32a MS |
17272 | complaint (&symfile_complaints, |
17273 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
17274 | dwarf_form_name (attr->form)); |
17275 | return default_value; | |
17276 | } | |
17277 | } | |
17278 | ||
348e048f DE |
17279 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
17280 | On entry *REF_CU is the CU of SRC_DIE. | |
17281 | On exit *REF_CU is the CU of the result. */ | |
17282 | ||
17283 | static struct die_info * | |
17284 | follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr, | |
17285 | struct dwarf2_cu **ref_cu) | |
17286 | { | |
17287 | struct die_info *die; | |
17288 | ||
17289 | if (is_ref_attr (attr)) | |
17290 | die = follow_die_ref (src_die, attr, ref_cu); | |
55f1336d | 17291 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
17292 | die = follow_die_sig (src_die, attr, ref_cu); |
17293 | else | |
17294 | { | |
17295 | dump_die_for_error (src_die); | |
17296 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
17297 | (*ref_cu)->objfile->name); | |
17298 | } | |
17299 | ||
17300 | return die; | |
03dd20cc DJ |
17301 | } |
17302 | ||
5c631832 | 17303 | /* Follow reference OFFSET. |
673bfd45 DE |
17304 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
17305 | On exit *REF_CU is the CU of the result. | |
17306 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 17307 | |
f9aca02d | 17308 | static struct die_info * |
36586728 TT |
17309 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
17310 | struct dwarf2_cu **ref_cu) | |
c906108c | 17311 | { |
10b3939b | 17312 | struct die_info temp_die; |
f2f0e013 | 17313 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 17314 | |
348e048f DE |
17315 | gdb_assert (cu->per_cu != NULL); |
17316 | ||
98bfdba5 PA |
17317 | target_cu = cu; |
17318 | ||
3019eac3 | 17319 | if (cu->per_cu->is_debug_types) |
348e048f DE |
17320 | { |
17321 | /* .debug_types CUs cannot reference anything outside their CU. | |
17322 | If they need to, they have to reference a signatured type via | |
55f1336d | 17323 | DW_FORM_ref_sig8. */ |
348e048f | 17324 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 17325 | return NULL; |
348e048f | 17326 | } |
36586728 TT |
17327 | else if (offset_in_dwz != cu->per_cu->is_dwz |
17328 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
17329 | { |
17330 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 17331 | |
36586728 TT |
17332 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
17333 | cu->objfile); | |
03dd20cc DJ |
17334 | |
17335 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
17336 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
17337 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 17338 | |
10b3939b DJ |
17339 | target_cu = per_cu->cu; |
17340 | } | |
98bfdba5 PA |
17341 | else if (cu->dies == NULL) |
17342 | { | |
17343 | /* We're loading full DIEs during partial symbol reading. */ | |
17344 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 17345 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 17346 | } |
c906108c | 17347 | |
f2f0e013 | 17348 | *ref_cu = target_cu; |
51545339 | 17349 | temp_die.offset = offset; |
b64f50a1 | 17350 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 17351 | } |
10b3939b | 17352 | |
5c631832 JK |
17353 | /* Follow reference attribute ATTR of SRC_DIE. |
17354 | On entry *REF_CU is the CU of SRC_DIE. | |
17355 | On exit *REF_CU is the CU of the result. */ | |
17356 | ||
17357 | static struct die_info * | |
17358 | follow_die_ref (struct die_info *src_die, struct attribute *attr, | |
17359 | struct dwarf2_cu **ref_cu) | |
17360 | { | |
b64f50a1 | 17361 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
17362 | struct dwarf2_cu *cu = *ref_cu; |
17363 | struct die_info *die; | |
17364 | ||
36586728 TT |
17365 | die = follow_die_offset (offset, |
17366 | (attr->form == DW_FORM_GNU_ref_alt | |
17367 | || cu->per_cu->is_dwz), | |
17368 | ref_cu); | |
5c631832 JK |
17369 | if (!die) |
17370 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
17371 | "at 0x%x [in module %s]"), | |
b64f50a1 | 17372 | offset.sect_off, src_die->offset.sect_off, cu->objfile->name); |
348e048f | 17373 | |
5c631832 JK |
17374 | return die; |
17375 | } | |
17376 | ||
d83e736b JK |
17377 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
17378 | Returned value is intended for DW_OP_call*. Returned | |
17379 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
17380 | |
17381 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
17382 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
17383 | struct dwarf2_per_cu_data *per_cu, | |
17384 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17385 | void *baton) | |
5c631832 | 17386 | { |
918dd910 | 17387 | struct dwarf2_cu *cu; |
5c631832 JK |
17388 | struct die_info *die; |
17389 | struct attribute *attr; | |
17390 | struct dwarf2_locexpr_baton retval; | |
17391 | ||
8cf6f0b1 TT |
17392 | dw2_setup (per_cu->objfile); |
17393 | ||
918dd910 JK |
17394 | if (per_cu->cu == NULL) |
17395 | load_cu (per_cu); | |
17396 | cu = per_cu->cu; | |
17397 | ||
36586728 | 17398 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
17399 | if (!die) |
17400 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
b64f50a1 | 17401 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17402 | |
17403 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
17404 | if (!attr) | |
17405 | { | |
e103e986 JK |
17406 | /* DWARF: "If there is no such attribute, then there is no effect.". |
17407 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 17408 | |
e103e986 | 17409 | retval.data = NULL; |
5c631832 JK |
17410 | retval.size = 0; |
17411 | } | |
8cf6f0b1 TT |
17412 | else if (attr_form_is_section_offset (attr)) |
17413 | { | |
17414 | struct dwarf2_loclist_baton loclist_baton; | |
17415 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
17416 | size_t size; | |
17417 | ||
17418 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
17419 | ||
17420 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
17421 | &size, pc); | |
17422 | retval.size = size; | |
17423 | } | |
5c631832 JK |
17424 | else |
17425 | { | |
17426 | if (!attr_form_is_block (attr)) | |
17427 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
17428 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
b64f50a1 | 17429 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17430 | |
17431 | retval.data = DW_BLOCK (attr)->data; | |
17432 | retval.size = DW_BLOCK (attr)->size; | |
17433 | } | |
17434 | retval.per_cu = cu->per_cu; | |
918dd910 | 17435 | |
918dd910 JK |
17436 | age_cached_comp_units (); |
17437 | ||
5c631832 | 17438 | return retval; |
348e048f DE |
17439 | } |
17440 | ||
8b9737bf TT |
17441 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
17442 | offset. */ | |
17443 | ||
17444 | struct dwarf2_locexpr_baton | |
17445 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
17446 | struct dwarf2_per_cu_data *per_cu, | |
17447 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17448 | void *baton) | |
17449 | { | |
17450 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
17451 | ||
17452 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
17453 | } | |
17454 | ||
8a9b8146 TT |
17455 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
17456 | PER_CU. */ | |
17457 | ||
17458 | struct type * | |
b64f50a1 | 17459 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
17460 | struct dwarf2_per_cu_data *per_cu) |
17461 | { | |
b64f50a1 JK |
17462 | sect_offset die_offset_sect; |
17463 | ||
8a9b8146 | 17464 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
17465 | |
17466 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
17467 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
17468 | } |
17469 | ||
348e048f DE |
17470 | /* Follow the signature attribute ATTR in SRC_DIE. |
17471 | On entry *REF_CU is the CU of SRC_DIE. | |
17472 | On exit *REF_CU is the CU of the result. */ | |
17473 | ||
17474 | static struct die_info * | |
17475 | follow_die_sig (struct die_info *src_die, struct attribute *attr, | |
17476 | struct dwarf2_cu **ref_cu) | |
17477 | { | |
17478 | struct objfile *objfile = (*ref_cu)->objfile; | |
17479 | struct die_info temp_die; | |
17480 | struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr); | |
17481 | struct dwarf2_cu *sig_cu; | |
17482 | struct die_info *die; | |
17483 | ||
17484 | /* sig_type will be NULL if the signatured type is missing from | |
17485 | the debug info. */ | |
17486 | if (sig_type == NULL) | |
17487 | error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE " | |
17488 | "at 0x%x [in module %s]"), | |
b64f50a1 | 17489 | src_die->offset.sect_off, objfile->name); |
348e048f DE |
17490 | |
17491 | /* If necessary, add it to the queue and load its DIEs. */ | |
17492 | ||
95554aad | 17493 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 17494 | read_signatured_type (sig_type); |
348e048f DE |
17495 | |
17496 | gdb_assert (sig_type->per_cu.cu != NULL); | |
17497 | ||
17498 | sig_cu = sig_type->per_cu.cu; | |
3019eac3 DE |
17499 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
17500 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
17501 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
17502 | temp_die.offset.sect_off); | |
348e048f DE |
17503 | if (die) |
17504 | { | |
17505 | *ref_cu = sig_cu; | |
17506 | return die; | |
17507 | } | |
17508 | ||
3e43a32a MS |
17509 | error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced " |
17510 | "from DIE at 0x%x [in module %s]"), | |
b64f50a1 | 17511 | temp_die.offset.sect_off, src_die->offset.sect_off, objfile->name); |
348e048f DE |
17512 | } |
17513 | ||
17514 | /* Given an offset of a signatured type, return its signatured_type. */ | |
17515 | ||
17516 | static struct signatured_type * | |
8b70b953 TT |
17517 | lookup_signatured_type_at_offset (struct objfile *objfile, |
17518 | struct dwarf2_section_info *section, | |
b64f50a1 | 17519 | sect_offset offset) |
348e048f | 17520 | { |
b64f50a1 | 17521 | gdb_byte *info_ptr = section->buffer + offset.sect_off; |
348e048f DE |
17522 | unsigned int length, initial_length_size; |
17523 | unsigned int sig_offset; | |
52dc124a | 17524 | struct signatured_type find_entry, *sig_type; |
348e048f DE |
17525 | |
17526 | length = read_initial_length (objfile->obfd, info_ptr, &initial_length_size); | |
17527 | sig_offset = (initial_length_size | |
17528 | + 2 /*version*/ | |
17529 | + (initial_length_size == 4 ? 4 : 8) /*debug_abbrev_offset*/ | |
17530 | + 1 /*address_size*/); | |
17531 | find_entry.signature = bfd_get_64 (objfile->obfd, info_ptr + sig_offset); | |
52dc124a | 17532 | sig_type = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); |
348e048f DE |
17533 | |
17534 | /* This is only used to lookup previously recorded types. | |
17535 | If we didn't find it, it's our bug. */ | |
52dc124a DE |
17536 | gdb_assert (sig_type != NULL); |
17537 | gdb_assert (offset.sect_off == sig_type->per_cu.offset.sect_off); | |
348e048f | 17538 | |
52dc124a | 17539 | return sig_type; |
348e048f DE |
17540 | } |
17541 | ||
e5fe5e75 | 17542 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
17543 | |
17544 | static void | |
e5fe5e75 | 17545 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 17546 | { |
52dc124a | 17547 | struct signatured_type *sig_type; |
348e048f | 17548 | |
f4dc4d17 DE |
17549 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
17550 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
17551 | ||
6721b2ec DE |
17552 | /* We have the per_cu, but we need the signatured_type. |
17553 | Fortunately this is an easy translation. */ | |
17554 | gdb_assert (per_cu->is_debug_types); | |
17555 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 17556 | |
6721b2ec | 17557 | gdb_assert (per_cu->cu == NULL); |
348e048f | 17558 | |
52dc124a | 17559 | read_signatured_type (sig_type); |
348e048f | 17560 | |
6721b2ec | 17561 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
17562 | } |
17563 | ||
dee91e82 DE |
17564 | /* die_reader_func for read_signatured_type. |
17565 | This is identical to load_full_comp_unit_reader, | |
17566 | but is kept separate for now. */ | |
348e048f DE |
17567 | |
17568 | static void | |
dee91e82 DE |
17569 | read_signatured_type_reader (const struct die_reader_specs *reader, |
17570 | gdb_byte *info_ptr, | |
17571 | struct die_info *comp_unit_die, | |
17572 | int has_children, | |
17573 | void *data) | |
348e048f | 17574 | { |
dee91e82 | 17575 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 17576 | |
dee91e82 DE |
17577 | gdb_assert (cu->die_hash == NULL); |
17578 | cu->die_hash = | |
17579 | htab_create_alloc_ex (cu->header.length / 12, | |
17580 | die_hash, | |
17581 | die_eq, | |
17582 | NULL, | |
17583 | &cu->comp_unit_obstack, | |
17584 | hashtab_obstack_allocate, | |
17585 | dummy_obstack_deallocate); | |
348e048f | 17586 | |
dee91e82 DE |
17587 | if (has_children) |
17588 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
17589 | &info_ptr, comp_unit_die); | |
17590 | cu->dies = comp_unit_die; | |
17591 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
17592 | |
17593 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 17594 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 17595 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
17596 | or we won't be able to build types correctly. |
17597 | Similarly, if we do not read the producer, we can not apply | |
17598 | producer-specific interpretation. */ | |
95554aad | 17599 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 17600 | } |
348e048f | 17601 | |
3019eac3 DE |
17602 | /* Read in a signatured type and build its CU and DIEs. |
17603 | If the type is a stub for the real type in a DWO file, | |
17604 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
17605 | |
17606 | static void | |
17607 | read_signatured_type (struct signatured_type *sig_type) | |
17608 | { | |
17609 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 17610 | |
3019eac3 | 17611 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 17612 | gdb_assert (per_cu->cu == NULL); |
348e048f | 17613 | |
f4dc4d17 DE |
17614 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
17615 | read_signatured_type_reader, NULL); | |
c906108c SS |
17616 | } |
17617 | ||
c906108c SS |
17618 | /* Decode simple location descriptions. |
17619 | Given a pointer to a dwarf block that defines a location, compute | |
17620 | the location and return the value. | |
17621 | ||
4cecd739 DJ |
17622 | NOTE drow/2003-11-18: This function is called in two situations |
17623 | now: for the address of static or global variables (partial symbols | |
17624 | only) and for offsets into structures which are expected to be | |
17625 | (more or less) constant. The partial symbol case should go away, | |
17626 | and only the constant case should remain. That will let this | |
17627 | function complain more accurately. A few special modes are allowed | |
17628 | without complaint for global variables (for instance, global | |
17629 | register values and thread-local values). | |
c906108c SS |
17630 | |
17631 | A location description containing no operations indicates that the | |
4cecd739 | 17632 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
17633 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
17634 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
17635 | complaint. |
17636 | ||
17637 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
17638 | |
17639 | static CORE_ADDR | |
e7c27a73 | 17640 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 17641 | { |
e7c27a73 | 17642 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
17643 | size_t i; |
17644 | size_t size = blk->size; | |
21ae7a4d JK |
17645 | gdb_byte *data = blk->data; |
17646 | CORE_ADDR stack[64]; | |
17647 | int stacki; | |
17648 | unsigned int bytes_read, unsnd; | |
17649 | gdb_byte op; | |
c906108c | 17650 | |
21ae7a4d JK |
17651 | i = 0; |
17652 | stacki = 0; | |
17653 | stack[stacki] = 0; | |
17654 | stack[++stacki] = 0; | |
17655 | ||
17656 | while (i < size) | |
17657 | { | |
17658 | op = data[i++]; | |
17659 | switch (op) | |
17660 | { | |
17661 | case DW_OP_lit0: | |
17662 | case DW_OP_lit1: | |
17663 | case DW_OP_lit2: | |
17664 | case DW_OP_lit3: | |
17665 | case DW_OP_lit4: | |
17666 | case DW_OP_lit5: | |
17667 | case DW_OP_lit6: | |
17668 | case DW_OP_lit7: | |
17669 | case DW_OP_lit8: | |
17670 | case DW_OP_lit9: | |
17671 | case DW_OP_lit10: | |
17672 | case DW_OP_lit11: | |
17673 | case DW_OP_lit12: | |
17674 | case DW_OP_lit13: | |
17675 | case DW_OP_lit14: | |
17676 | case DW_OP_lit15: | |
17677 | case DW_OP_lit16: | |
17678 | case DW_OP_lit17: | |
17679 | case DW_OP_lit18: | |
17680 | case DW_OP_lit19: | |
17681 | case DW_OP_lit20: | |
17682 | case DW_OP_lit21: | |
17683 | case DW_OP_lit22: | |
17684 | case DW_OP_lit23: | |
17685 | case DW_OP_lit24: | |
17686 | case DW_OP_lit25: | |
17687 | case DW_OP_lit26: | |
17688 | case DW_OP_lit27: | |
17689 | case DW_OP_lit28: | |
17690 | case DW_OP_lit29: | |
17691 | case DW_OP_lit30: | |
17692 | case DW_OP_lit31: | |
17693 | stack[++stacki] = op - DW_OP_lit0; | |
17694 | break; | |
f1bea926 | 17695 | |
21ae7a4d JK |
17696 | case DW_OP_reg0: |
17697 | case DW_OP_reg1: | |
17698 | case DW_OP_reg2: | |
17699 | case DW_OP_reg3: | |
17700 | case DW_OP_reg4: | |
17701 | case DW_OP_reg5: | |
17702 | case DW_OP_reg6: | |
17703 | case DW_OP_reg7: | |
17704 | case DW_OP_reg8: | |
17705 | case DW_OP_reg9: | |
17706 | case DW_OP_reg10: | |
17707 | case DW_OP_reg11: | |
17708 | case DW_OP_reg12: | |
17709 | case DW_OP_reg13: | |
17710 | case DW_OP_reg14: | |
17711 | case DW_OP_reg15: | |
17712 | case DW_OP_reg16: | |
17713 | case DW_OP_reg17: | |
17714 | case DW_OP_reg18: | |
17715 | case DW_OP_reg19: | |
17716 | case DW_OP_reg20: | |
17717 | case DW_OP_reg21: | |
17718 | case DW_OP_reg22: | |
17719 | case DW_OP_reg23: | |
17720 | case DW_OP_reg24: | |
17721 | case DW_OP_reg25: | |
17722 | case DW_OP_reg26: | |
17723 | case DW_OP_reg27: | |
17724 | case DW_OP_reg28: | |
17725 | case DW_OP_reg29: | |
17726 | case DW_OP_reg30: | |
17727 | case DW_OP_reg31: | |
17728 | stack[++stacki] = op - DW_OP_reg0; | |
17729 | if (i < size) | |
17730 | dwarf2_complex_location_expr_complaint (); | |
17731 | break; | |
c906108c | 17732 | |
21ae7a4d JK |
17733 | case DW_OP_regx: |
17734 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
17735 | i += bytes_read; | |
17736 | stack[++stacki] = unsnd; | |
17737 | if (i < size) | |
17738 | dwarf2_complex_location_expr_complaint (); | |
17739 | break; | |
c906108c | 17740 | |
21ae7a4d JK |
17741 | case DW_OP_addr: |
17742 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
17743 | cu, &bytes_read); | |
17744 | i += bytes_read; | |
17745 | break; | |
d53d4ac5 | 17746 | |
21ae7a4d JK |
17747 | case DW_OP_const1u: |
17748 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
17749 | i += 1; | |
17750 | break; | |
17751 | ||
17752 | case DW_OP_const1s: | |
17753 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
17754 | i += 1; | |
17755 | break; | |
17756 | ||
17757 | case DW_OP_const2u: | |
17758 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
17759 | i += 2; | |
17760 | break; | |
17761 | ||
17762 | case DW_OP_const2s: | |
17763 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
17764 | i += 2; | |
17765 | break; | |
d53d4ac5 | 17766 | |
21ae7a4d JK |
17767 | case DW_OP_const4u: |
17768 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
17769 | i += 4; | |
17770 | break; | |
17771 | ||
17772 | case DW_OP_const4s: | |
17773 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
17774 | i += 4; | |
17775 | break; | |
17776 | ||
585861ea JK |
17777 | case DW_OP_const8u: |
17778 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
17779 | i += 8; | |
17780 | break; | |
17781 | ||
21ae7a4d JK |
17782 | case DW_OP_constu: |
17783 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
17784 | &bytes_read); | |
17785 | i += bytes_read; | |
17786 | break; | |
17787 | ||
17788 | case DW_OP_consts: | |
17789 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
17790 | i += bytes_read; | |
17791 | break; | |
17792 | ||
17793 | case DW_OP_dup: | |
17794 | stack[stacki + 1] = stack[stacki]; | |
17795 | stacki++; | |
17796 | break; | |
17797 | ||
17798 | case DW_OP_plus: | |
17799 | stack[stacki - 1] += stack[stacki]; | |
17800 | stacki--; | |
17801 | break; | |
17802 | ||
17803 | case DW_OP_plus_uconst: | |
17804 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
17805 | &bytes_read); | |
17806 | i += bytes_read; | |
17807 | break; | |
17808 | ||
17809 | case DW_OP_minus: | |
17810 | stack[stacki - 1] -= stack[stacki]; | |
17811 | stacki--; | |
17812 | break; | |
17813 | ||
17814 | case DW_OP_deref: | |
17815 | /* If we're not the last op, then we definitely can't encode | |
17816 | this using GDB's address_class enum. This is valid for partial | |
17817 | global symbols, although the variable's address will be bogus | |
17818 | in the psymtab. */ | |
17819 | if (i < size) | |
17820 | dwarf2_complex_location_expr_complaint (); | |
17821 | break; | |
17822 | ||
17823 | case DW_OP_GNU_push_tls_address: | |
17824 | /* The top of the stack has the offset from the beginning | |
17825 | of the thread control block at which the variable is located. */ | |
17826 | /* Nothing should follow this operator, so the top of stack would | |
17827 | be returned. */ | |
17828 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
17829 | address will be bogus in the psymtab. Make it always at least |
17830 | non-zero to not look as a variable garbage collected by linker | |
17831 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
17832 | if (i < size) |
17833 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 17834 | stack[stacki]++; |
21ae7a4d JK |
17835 | break; |
17836 | ||
17837 | case DW_OP_GNU_uninit: | |
17838 | break; | |
17839 | ||
3019eac3 | 17840 | case DW_OP_GNU_addr_index: |
49f6c839 | 17841 | case DW_OP_GNU_const_index: |
3019eac3 DE |
17842 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
17843 | &bytes_read); | |
17844 | i += bytes_read; | |
17845 | break; | |
17846 | ||
21ae7a4d JK |
17847 | default: |
17848 | { | |
f39c6ffd | 17849 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
17850 | |
17851 | if (name) | |
17852 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
17853 | name); | |
17854 | else | |
17855 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
17856 | op); | |
17857 | } | |
17858 | ||
17859 | return (stack[stacki]); | |
d53d4ac5 | 17860 | } |
3c6e0cb3 | 17861 | |
21ae7a4d JK |
17862 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
17863 | outside of the allocated space. Also enforce minimum>0. */ | |
17864 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
17865 | { | |
17866 | complaint (&symfile_complaints, | |
17867 | _("location description stack overflow")); | |
17868 | return 0; | |
17869 | } | |
17870 | ||
17871 | if (stacki <= 0) | |
17872 | { | |
17873 | complaint (&symfile_complaints, | |
17874 | _("location description stack underflow")); | |
17875 | return 0; | |
17876 | } | |
17877 | } | |
17878 | return (stack[stacki]); | |
c906108c SS |
17879 | } |
17880 | ||
17881 | /* memory allocation interface */ | |
17882 | ||
c906108c | 17883 | static struct dwarf_block * |
7b5a2f43 | 17884 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
17885 | { |
17886 | struct dwarf_block *blk; | |
17887 | ||
17888 | blk = (struct dwarf_block *) | |
7b5a2f43 | 17889 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
17890 | return (blk); |
17891 | } | |
17892 | ||
c906108c | 17893 | static struct die_info * |
b60c80d6 | 17894 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
17895 | { |
17896 | struct die_info *die; | |
b60c80d6 DJ |
17897 | size_t size = sizeof (struct die_info); |
17898 | ||
17899 | if (num_attrs > 1) | |
17900 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 17901 | |
b60c80d6 | 17902 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
17903 | memset (die, 0, sizeof (struct die_info)); |
17904 | return (die); | |
17905 | } | |
2e276125 JB |
17906 | |
17907 | \f | |
17908 | /* Macro support. */ | |
17909 | ||
2e276125 JB |
17910 | /* Return the full name of file number I in *LH's file name table. |
17911 | Use COMP_DIR as the name of the current directory of the | |
17912 | compilation. The result is allocated using xmalloc; the caller is | |
17913 | responsible for freeing it. */ | |
17914 | static char * | |
17915 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
17916 | { | |
6a83a1e6 EZ |
17917 | /* Is the file number a valid index into the line header's file name |
17918 | table? Remember that file numbers start with one, not zero. */ | |
17919 | if (1 <= file && file <= lh->num_file_names) | |
17920 | { | |
17921 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 17922 | |
6a83a1e6 EZ |
17923 | if (IS_ABSOLUTE_PATH (fe->name)) |
17924 | return xstrdup (fe->name); | |
17925 | else | |
17926 | { | |
17927 | const char *dir; | |
17928 | int dir_len; | |
17929 | char *full_name; | |
17930 | ||
17931 | if (fe->dir_index) | |
17932 | dir = lh->include_dirs[fe->dir_index - 1]; | |
17933 | else | |
17934 | dir = comp_dir; | |
17935 | ||
17936 | if (dir) | |
17937 | { | |
17938 | dir_len = strlen (dir); | |
17939 | full_name = xmalloc (dir_len + 1 + strlen (fe->name) + 1); | |
17940 | strcpy (full_name, dir); | |
17941 | full_name[dir_len] = '/'; | |
17942 | strcpy (full_name + dir_len + 1, fe->name); | |
17943 | return full_name; | |
17944 | } | |
17945 | else | |
17946 | return xstrdup (fe->name); | |
17947 | } | |
17948 | } | |
2e276125 JB |
17949 | else |
17950 | { | |
6a83a1e6 EZ |
17951 | /* The compiler produced a bogus file number. We can at least |
17952 | record the macro definitions made in the file, even if we | |
17953 | won't be able to find the file by name. */ | |
17954 | char fake_name[80]; | |
9a619af0 | 17955 | |
8c042590 PM |
17956 | xsnprintf (fake_name, sizeof (fake_name), |
17957 | "<bad macro file number %d>", file); | |
2e276125 | 17958 | |
6e70227d | 17959 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
17960 | _("bad file number in macro information (%d)"), |
17961 | file); | |
2e276125 | 17962 | |
6a83a1e6 | 17963 | return xstrdup (fake_name); |
2e276125 JB |
17964 | } |
17965 | } | |
17966 | ||
17967 | ||
17968 | static struct macro_source_file * | |
17969 | macro_start_file (int file, int line, | |
17970 | struct macro_source_file *current_file, | |
17971 | const char *comp_dir, | |
17972 | struct line_header *lh, struct objfile *objfile) | |
17973 | { | |
17974 | /* The full name of this source file. */ | |
17975 | char *full_name = file_full_name (file, lh, comp_dir); | |
17976 | ||
17977 | /* We don't create a macro table for this compilation unit | |
17978 | at all until we actually get a filename. */ | |
17979 | if (! pending_macros) | |
6532ff36 TT |
17980 | pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack, |
17981 | objfile->per_bfd->macro_cache); | |
2e276125 JB |
17982 | |
17983 | if (! current_file) | |
abc9d0dc TT |
17984 | { |
17985 | /* If we have no current file, then this must be the start_file | |
17986 | directive for the compilation unit's main source file. */ | |
17987 | current_file = macro_set_main (pending_macros, full_name); | |
17988 | macro_define_special (pending_macros); | |
17989 | } | |
2e276125 JB |
17990 | else |
17991 | current_file = macro_include (current_file, line, full_name); | |
17992 | ||
17993 | xfree (full_name); | |
6e70227d | 17994 | |
2e276125 JB |
17995 | return current_file; |
17996 | } | |
17997 | ||
17998 | ||
17999 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
18000 | followed by a null byte. */ | |
18001 | static char * | |
18002 | copy_string (const char *buf, int len) | |
18003 | { | |
18004 | char *s = xmalloc (len + 1); | |
9a619af0 | 18005 | |
2e276125 JB |
18006 | memcpy (s, buf, len); |
18007 | s[len] = '\0'; | |
2e276125 JB |
18008 | return s; |
18009 | } | |
18010 | ||
18011 | ||
18012 | static const char * | |
18013 | consume_improper_spaces (const char *p, const char *body) | |
18014 | { | |
18015 | if (*p == ' ') | |
18016 | { | |
4d3c2250 | 18017 | complaint (&symfile_complaints, |
3e43a32a MS |
18018 | _("macro definition contains spaces " |
18019 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 18020 | body); |
2e276125 JB |
18021 | |
18022 | while (*p == ' ') | |
18023 | p++; | |
18024 | } | |
18025 | ||
18026 | return p; | |
18027 | } | |
18028 | ||
18029 | ||
18030 | static void | |
18031 | parse_macro_definition (struct macro_source_file *file, int line, | |
18032 | const char *body) | |
18033 | { | |
18034 | const char *p; | |
18035 | ||
18036 | /* The body string takes one of two forms. For object-like macro | |
18037 | definitions, it should be: | |
18038 | ||
18039 | <macro name> " " <definition> | |
18040 | ||
18041 | For function-like macro definitions, it should be: | |
18042 | ||
18043 | <macro name> "() " <definition> | |
18044 | or | |
18045 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
18046 | ||
18047 | Spaces may appear only where explicitly indicated, and in the | |
18048 | <definition>. | |
18049 | ||
18050 | The Dwarf 2 spec says that an object-like macro's name is always | |
18051 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 18052 | the space when the macro's definition is the empty string. |
2e276125 JB |
18053 | |
18054 | The Dwarf 2 spec says that there should be no spaces between the | |
18055 | formal arguments in a function-like macro's formal argument list, | |
18056 | but versions of GCC around March 2002 include spaces after the | |
18057 | commas. */ | |
18058 | ||
18059 | ||
18060 | /* Find the extent of the macro name. The macro name is terminated | |
18061 | by either a space or null character (for an object-like macro) or | |
18062 | an opening paren (for a function-like macro). */ | |
18063 | for (p = body; *p; p++) | |
18064 | if (*p == ' ' || *p == '(') | |
18065 | break; | |
18066 | ||
18067 | if (*p == ' ' || *p == '\0') | |
18068 | { | |
18069 | /* It's an object-like macro. */ | |
18070 | int name_len = p - body; | |
18071 | char *name = copy_string (body, name_len); | |
18072 | const char *replacement; | |
18073 | ||
18074 | if (*p == ' ') | |
18075 | replacement = body + name_len + 1; | |
18076 | else | |
18077 | { | |
4d3c2250 | 18078 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18079 | replacement = body + name_len; |
18080 | } | |
6e70227d | 18081 | |
2e276125 JB |
18082 | macro_define_object (file, line, name, replacement); |
18083 | ||
18084 | xfree (name); | |
18085 | } | |
18086 | else if (*p == '(') | |
18087 | { | |
18088 | /* It's a function-like macro. */ | |
18089 | char *name = copy_string (body, p - body); | |
18090 | int argc = 0; | |
18091 | int argv_size = 1; | |
18092 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
18093 | ||
18094 | p++; | |
18095 | ||
18096 | p = consume_improper_spaces (p, body); | |
18097 | ||
18098 | /* Parse the formal argument list. */ | |
18099 | while (*p && *p != ')') | |
18100 | { | |
18101 | /* Find the extent of the current argument name. */ | |
18102 | const char *arg_start = p; | |
18103 | ||
18104 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
18105 | p++; | |
18106 | ||
18107 | if (! *p || p == arg_start) | |
4d3c2250 | 18108 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18109 | else |
18110 | { | |
18111 | /* Make sure argv has room for the new argument. */ | |
18112 | if (argc >= argv_size) | |
18113 | { | |
18114 | argv_size *= 2; | |
18115 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
18116 | } | |
18117 | ||
18118 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
18119 | } | |
18120 | ||
18121 | p = consume_improper_spaces (p, body); | |
18122 | ||
18123 | /* Consume the comma, if present. */ | |
18124 | if (*p == ',') | |
18125 | { | |
18126 | p++; | |
18127 | ||
18128 | p = consume_improper_spaces (p, body); | |
18129 | } | |
18130 | } | |
18131 | ||
18132 | if (*p == ')') | |
18133 | { | |
18134 | p++; | |
18135 | ||
18136 | if (*p == ' ') | |
18137 | /* Perfectly formed definition, no complaints. */ | |
18138 | macro_define_function (file, line, name, | |
6e70227d | 18139 | argc, (const char **) argv, |
2e276125 JB |
18140 | p + 1); |
18141 | else if (*p == '\0') | |
18142 | { | |
18143 | /* Complain, but do define it. */ | |
4d3c2250 | 18144 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 18145 | macro_define_function (file, line, name, |
6e70227d | 18146 | argc, (const char **) argv, |
2e276125 JB |
18147 | p); |
18148 | } | |
18149 | else | |
18150 | /* Just complain. */ | |
4d3c2250 | 18151 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18152 | } |
18153 | else | |
18154 | /* Just complain. */ | |
4d3c2250 | 18155 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18156 | |
18157 | xfree (name); | |
18158 | { | |
18159 | int i; | |
18160 | ||
18161 | for (i = 0; i < argc; i++) | |
18162 | xfree (argv[i]); | |
18163 | } | |
18164 | xfree (argv); | |
18165 | } | |
18166 | else | |
4d3c2250 | 18167 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18168 | } |
18169 | ||
cf2c3c16 TT |
18170 | /* Skip some bytes from BYTES according to the form given in FORM. |
18171 | Returns the new pointer. */ | |
2e276125 | 18172 | |
cf2c3c16 | 18173 | static gdb_byte * |
f664829e | 18174 | skip_form_bytes (bfd *abfd, gdb_byte *bytes, gdb_byte *buffer_end, |
cf2c3c16 TT |
18175 | enum dwarf_form form, |
18176 | unsigned int offset_size, | |
18177 | struct dwarf2_section_info *section) | |
2e276125 | 18178 | { |
cf2c3c16 | 18179 | unsigned int bytes_read; |
2e276125 | 18180 | |
cf2c3c16 | 18181 | switch (form) |
2e276125 | 18182 | { |
cf2c3c16 TT |
18183 | case DW_FORM_data1: |
18184 | case DW_FORM_flag: | |
18185 | ++bytes; | |
18186 | break; | |
18187 | ||
18188 | case DW_FORM_data2: | |
18189 | bytes += 2; | |
18190 | break; | |
18191 | ||
18192 | case DW_FORM_data4: | |
18193 | bytes += 4; | |
18194 | break; | |
18195 | ||
18196 | case DW_FORM_data8: | |
18197 | bytes += 8; | |
18198 | break; | |
18199 | ||
18200 | case DW_FORM_string: | |
18201 | read_direct_string (abfd, bytes, &bytes_read); | |
18202 | bytes += bytes_read; | |
18203 | break; | |
18204 | ||
18205 | case DW_FORM_sec_offset: | |
18206 | case DW_FORM_strp: | |
36586728 | 18207 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
18208 | bytes += offset_size; |
18209 | break; | |
18210 | ||
18211 | case DW_FORM_block: | |
18212 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
18213 | bytes += bytes_read; | |
18214 | break; | |
18215 | ||
18216 | case DW_FORM_block1: | |
18217 | bytes += 1 + read_1_byte (abfd, bytes); | |
18218 | break; | |
18219 | case DW_FORM_block2: | |
18220 | bytes += 2 + read_2_bytes (abfd, bytes); | |
18221 | break; | |
18222 | case DW_FORM_block4: | |
18223 | bytes += 4 + read_4_bytes (abfd, bytes); | |
18224 | break; | |
18225 | ||
18226 | case DW_FORM_sdata: | |
18227 | case DW_FORM_udata: | |
3019eac3 DE |
18228 | case DW_FORM_GNU_addr_index: |
18229 | case DW_FORM_GNU_str_index: | |
f664829e DE |
18230 | bytes = (gdb_byte *) gdb_skip_leb128 (bytes, buffer_end); |
18231 | if (bytes == NULL) | |
18232 | { | |
18233 | dwarf2_section_buffer_overflow_complaint (section); | |
18234 | return NULL; | |
18235 | } | |
cf2c3c16 TT |
18236 | break; |
18237 | ||
18238 | default: | |
18239 | { | |
18240 | complain: | |
18241 | complaint (&symfile_complaints, | |
18242 | _("invalid form 0x%x in `%s'"), | |
18243 | form, | |
18244 | section->asection->name); | |
18245 | return NULL; | |
18246 | } | |
2e276125 JB |
18247 | } |
18248 | ||
cf2c3c16 TT |
18249 | return bytes; |
18250 | } | |
757a13d0 | 18251 | |
cf2c3c16 TT |
18252 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
18253 | opcode. Returns an updated pointer to the macro data buffer; or, | |
18254 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 18255 | |
cf2c3c16 TT |
18256 | static gdb_byte * |
18257 | skip_unknown_opcode (unsigned int opcode, | |
18258 | gdb_byte **opcode_definitions, | |
f664829e | 18259 | gdb_byte *mac_ptr, gdb_byte *mac_end, |
cf2c3c16 TT |
18260 | bfd *abfd, |
18261 | unsigned int offset_size, | |
18262 | struct dwarf2_section_info *section) | |
18263 | { | |
18264 | unsigned int bytes_read, i; | |
18265 | unsigned long arg; | |
18266 | gdb_byte *defn; | |
2e276125 | 18267 | |
cf2c3c16 | 18268 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 18269 | { |
cf2c3c16 TT |
18270 | complaint (&symfile_complaints, |
18271 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
18272 | opcode); | |
18273 | return NULL; | |
18274 | } | |
2e276125 | 18275 | |
cf2c3c16 TT |
18276 | defn = opcode_definitions[opcode]; |
18277 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
18278 | defn += bytes_read; | |
2e276125 | 18279 | |
cf2c3c16 TT |
18280 | for (i = 0; i < arg; ++i) |
18281 | { | |
f664829e DE |
18282 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
18283 | section); | |
cf2c3c16 TT |
18284 | if (mac_ptr == NULL) |
18285 | { | |
18286 | /* skip_form_bytes already issued the complaint. */ | |
18287 | return NULL; | |
18288 | } | |
18289 | } | |
757a13d0 | 18290 | |
cf2c3c16 TT |
18291 | return mac_ptr; |
18292 | } | |
757a13d0 | 18293 | |
cf2c3c16 TT |
18294 | /* A helper function which parses the header of a macro section. |
18295 | If the macro section is the extended (for now called "GNU") type, | |
18296 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
18297 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 18298 | |
cf2c3c16 TT |
18299 | static gdb_byte * |
18300 | dwarf_parse_macro_header (gdb_byte **opcode_definitions, | |
18301 | bfd *abfd, | |
18302 | gdb_byte *mac_ptr, | |
18303 | unsigned int *offset_size, | |
18304 | int section_is_gnu) | |
18305 | { | |
18306 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 18307 | |
cf2c3c16 TT |
18308 | if (section_is_gnu) |
18309 | { | |
18310 | unsigned int version, flags; | |
757a13d0 | 18311 | |
cf2c3c16 TT |
18312 | version = read_2_bytes (abfd, mac_ptr); |
18313 | if (version != 4) | |
18314 | { | |
18315 | complaint (&symfile_complaints, | |
18316 | _("unrecognized version `%d' in .debug_macro section"), | |
18317 | version); | |
18318 | return NULL; | |
18319 | } | |
18320 | mac_ptr += 2; | |
757a13d0 | 18321 | |
cf2c3c16 TT |
18322 | flags = read_1_byte (abfd, mac_ptr); |
18323 | ++mac_ptr; | |
18324 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 18325 | |
cf2c3c16 TT |
18326 | if ((flags & 2) != 0) |
18327 | /* We don't need the line table offset. */ | |
18328 | mac_ptr += *offset_size; | |
757a13d0 | 18329 | |
cf2c3c16 TT |
18330 | /* Vendor opcode descriptions. */ |
18331 | if ((flags & 4) != 0) | |
18332 | { | |
18333 | unsigned int i, count; | |
757a13d0 | 18334 | |
cf2c3c16 TT |
18335 | count = read_1_byte (abfd, mac_ptr); |
18336 | ++mac_ptr; | |
18337 | for (i = 0; i < count; ++i) | |
18338 | { | |
18339 | unsigned int opcode, bytes_read; | |
18340 | unsigned long arg; | |
18341 | ||
18342 | opcode = read_1_byte (abfd, mac_ptr); | |
18343 | ++mac_ptr; | |
18344 | opcode_definitions[opcode] = mac_ptr; | |
18345 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18346 | mac_ptr += bytes_read; | |
18347 | mac_ptr += arg; | |
18348 | } | |
757a13d0 | 18349 | } |
cf2c3c16 | 18350 | } |
757a13d0 | 18351 | |
cf2c3c16 TT |
18352 | return mac_ptr; |
18353 | } | |
757a13d0 | 18354 | |
cf2c3c16 | 18355 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 18356 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
18357 | |
18358 | static void | |
18359 | dwarf_decode_macro_bytes (bfd *abfd, gdb_byte *mac_ptr, gdb_byte *mac_end, | |
18360 | struct macro_source_file *current_file, | |
18361 | struct line_header *lh, char *comp_dir, | |
18362 | struct dwarf2_section_info *section, | |
36586728 | 18363 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 18364 | unsigned int offset_size, |
8fc3fc34 TT |
18365 | struct objfile *objfile, |
18366 | htab_t include_hash) | |
cf2c3c16 TT |
18367 | { |
18368 | enum dwarf_macro_record_type macinfo_type; | |
18369 | int at_commandline; | |
18370 | gdb_byte *opcode_definitions[256]; | |
757a13d0 | 18371 | |
cf2c3c16 TT |
18372 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
18373 | &offset_size, section_is_gnu); | |
18374 | if (mac_ptr == NULL) | |
18375 | { | |
18376 | /* We already issued a complaint. */ | |
18377 | return; | |
18378 | } | |
757a13d0 JK |
18379 | |
18380 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
18381 | GDB is still reading the definitions from command line. First | |
18382 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
18383 | to create CURRENT_FILE for the main source holding also the command line | |
18384 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
18385 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
18386 | ||
18387 | at_commandline = 1; | |
18388 | ||
18389 | do | |
18390 | { | |
18391 | /* Do we at least have room for a macinfo type byte? */ | |
18392 | if (mac_ptr >= mac_end) | |
18393 | { | |
f664829e | 18394 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
18395 | break; |
18396 | } | |
18397 | ||
18398 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
18399 | mac_ptr++; | |
18400 | ||
cf2c3c16 TT |
18401 | /* Note that we rely on the fact that the corresponding GNU and |
18402 | DWARF constants are the same. */ | |
757a13d0 JK |
18403 | switch (macinfo_type) |
18404 | { | |
18405 | /* A zero macinfo type indicates the end of the macro | |
18406 | information. */ | |
18407 | case 0: | |
18408 | break; | |
2e276125 | 18409 | |
cf2c3c16 TT |
18410 | case DW_MACRO_GNU_define: |
18411 | case DW_MACRO_GNU_undef: | |
18412 | case DW_MACRO_GNU_define_indirect: | |
18413 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
18414 | case DW_MACRO_GNU_define_indirect_alt: |
18415 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 18416 | { |
891d2f0b | 18417 | unsigned int bytes_read; |
2e276125 JB |
18418 | int line; |
18419 | char *body; | |
cf2c3c16 | 18420 | int is_define; |
2e276125 | 18421 | |
cf2c3c16 TT |
18422 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
18423 | mac_ptr += bytes_read; | |
18424 | ||
18425 | if (macinfo_type == DW_MACRO_GNU_define | |
18426 | || macinfo_type == DW_MACRO_GNU_undef) | |
18427 | { | |
18428 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
18429 | mac_ptr += bytes_read; | |
18430 | } | |
18431 | else | |
18432 | { | |
18433 | LONGEST str_offset; | |
18434 | ||
18435 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18436 | mac_ptr += offset_size; | |
2e276125 | 18437 | |
36586728 | 18438 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
18439 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
18440 | || section_is_dwz) | |
36586728 TT |
18441 | { |
18442 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18443 | ||
18444 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
18445 | } | |
18446 | else | |
18447 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
18448 | } |
18449 | ||
18450 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
18451 | || macinfo_type == DW_MACRO_GNU_define_indirect |
18452 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 18453 | if (! current_file) |
757a13d0 JK |
18454 | { |
18455 | /* DWARF violation as no main source is present. */ | |
18456 | complaint (&symfile_complaints, | |
18457 | _("debug info with no main source gives macro %s " | |
18458 | "on line %d: %s"), | |
cf2c3c16 TT |
18459 | is_define ? _("definition") : _("undefinition"), |
18460 | line, body); | |
757a13d0 JK |
18461 | break; |
18462 | } | |
3e43a32a MS |
18463 | if ((line == 0 && !at_commandline) |
18464 | || (line != 0 && at_commandline)) | |
4d3c2250 | 18465 | complaint (&symfile_complaints, |
757a13d0 JK |
18466 | _("debug info gives %s macro %s with %s line %d: %s"), |
18467 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 18468 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
18469 | line == 0 ? _("zero") : _("non-zero"), line, body); |
18470 | ||
cf2c3c16 | 18471 | if (is_define) |
757a13d0 | 18472 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
18473 | else |
18474 | { | |
18475 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
18476 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
18477 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
18478 | macro_undef (current_file, line, body); |
18479 | } | |
2e276125 JB |
18480 | } |
18481 | break; | |
18482 | ||
cf2c3c16 | 18483 | case DW_MACRO_GNU_start_file: |
2e276125 | 18484 | { |
891d2f0b | 18485 | unsigned int bytes_read; |
2e276125 JB |
18486 | int line, file; |
18487 | ||
18488 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18489 | mac_ptr += bytes_read; | |
18490 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18491 | mac_ptr += bytes_read; | |
18492 | ||
3e43a32a MS |
18493 | if ((line == 0 && !at_commandline) |
18494 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
18495 | complaint (&symfile_complaints, |
18496 | _("debug info gives source %d included " | |
18497 | "from %s at %s line %d"), | |
18498 | file, at_commandline ? _("command-line") : _("file"), | |
18499 | line == 0 ? _("zero") : _("non-zero"), line); | |
18500 | ||
18501 | if (at_commandline) | |
18502 | { | |
cf2c3c16 TT |
18503 | /* This DW_MACRO_GNU_start_file was executed in the |
18504 | pass one. */ | |
757a13d0 JK |
18505 | at_commandline = 0; |
18506 | } | |
18507 | else | |
18508 | current_file = macro_start_file (file, line, | |
18509 | current_file, comp_dir, | |
cf2c3c16 | 18510 | lh, objfile); |
2e276125 JB |
18511 | } |
18512 | break; | |
18513 | ||
cf2c3c16 | 18514 | case DW_MACRO_GNU_end_file: |
2e276125 | 18515 | if (! current_file) |
4d3c2250 | 18516 | complaint (&symfile_complaints, |
3e43a32a MS |
18517 | _("macro debug info has an unmatched " |
18518 | "`close_file' directive")); | |
2e276125 JB |
18519 | else |
18520 | { | |
18521 | current_file = current_file->included_by; | |
18522 | if (! current_file) | |
18523 | { | |
cf2c3c16 | 18524 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
18525 | |
18526 | /* GCC circa March 2002 doesn't produce the zero | |
18527 | type byte marking the end of the compilation | |
18528 | unit. Complain if it's not there, but exit no | |
18529 | matter what. */ | |
18530 | ||
18531 | /* Do we at least have room for a macinfo type byte? */ | |
18532 | if (mac_ptr >= mac_end) | |
18533 | { | |
f664829e | 18534 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
18535 | return; |
18536 | } | |
18537 | ||
18538 | /* We don't increment mac_ptr here, so this is just | |
18539 | a look-ahead. */ | |
18540 | next_type = read_1_byte (abfd, mac_ptr); | |
18541 | if (next_type != 0) | |
4d3c2250 | 18542 | complaint (&symfile_complaints, |
3e43a32a MS |
18543 | _("no terminating 0-type entry for " |
18544 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
18545 | |
18546 | return; | |
18547 | } | |
18548 | } | |
18549 | break; | |
18550 | ||
cf2c3c16 | 18551 | case DW_MACRO_GNU_transparent_include: |
36586728 | 18552 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
18553 | { |
18554 | LONGEST offset; | |
8fc3fc34 | 18555 | void **slot; |
a036ba48 TT |
18556 | bfd *include_bfd = abfd; |
18557 | struct dwarf2_section_info *include_section = section; | |
18558 | struct dwarf2_section_info alt_section; | |
18559 | gdb_byte *include_mac_end = mac_end; | |
18560 | int is_dwz = section_is_dwz; | |
18561 | gdb_byte *new_mac_ptr; | |
cf2c3c16 TT |
18562 | |
18563 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18564 | mac_ptr += offset_size; | |
18565 | ||
a036ba48 TT |
18566 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
18567 | { | |
18568 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18569 | ||
18570 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
18571 | &dwz->macro); | |
18572 | ||
18573 | include_bfd = dwz->macro.asection->owner; | |
18574 | include_section = &dwz->macro; | |
18575 | include_mac_end = dwz->macro.buffer + dwz->macro.size; | |
18576 | is_dwz = 1; | |
18577 | } | |
18578 | ||
18579 | new_mac_ptr = include_section->buffer + offset; | |
18580 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
18581 | ||
8fc3fc34 TT |
18582 | if (*slot != NULL) |
18583 | { | |
18584 | /* This has actually happened; see | |
18585 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
18586 | complaint (&symfile_complaints, | |
18587 | _("recursive DW_MACRO_GNU_transparent_include in " | |
18588 | ".debug_macro section")); | |
18589 | } | |
18590 | else | |
18591 | { | |
a036ba48 | 18592 | *slot = new_mac_ptr; |
36586728 | 18593 | |
a036ba48 | 18594 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 18595 | include_mac_end, current_file, |
8fc3fc34 | 18596 | lh, comp_dir, |
36586728 | 18597 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
18598 | offset_size, objfile, include_hash); |
18599 | ||
a036ba48 | 18600 | htab_remove_elt (include_hash, new_mac_ptr); |
8fc3fc34 | 18601 | } |
cf2c3c16 TT |
18602 | } |
18603 | break; | |
18604 | ||
2e276125 | 18605 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
18606 | if (!section_is_gnu) |
18607 | { | |
18608 | unsigned int bytes_read; | |
18609 | int constant; | |
2e276125 | 18610 | |
cf2c3c16 TT |
18611 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
18612 | mac_ptr += bytes_read; | |
18613 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
18614 | mac_ptr += bytes_read; | |
2e276125 | 18615 | |
cf2c3c16 TT |
18616 | /* We don't recognize any vendor extensions. */ |
18617 | break; | |
18618 | } | |
18619 | /* FALLTHROUGH */ | |
18620 | ||
18621 | default: | |
18622 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 18623 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
18624 | section); |
18625 | if (mac_ptr == NULL) | |
18626 | return; | |
18627 | break; | |
2e276125 | 18628 | } |
757a13d0 | 18629 | } while (macinfo_type != 0); |
2e276125 | 18630 | } |
8e19ed76 | 18631 | |
cf2c3c16 | 18632 | static void |
09262596 DE |
18633 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
18634 | char *comp_dir, int section_is_gnu) | |
cf2c3c16 | 18635 | { |
bb5ed363 | 18636 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
18637 | struct line_header *lh = cu->line_header; |
18638 | bfd *abfd; | |
cf2c3c16 TT |
18639 | gdb_byte *mac_ptr, *mac_end; |
18640 | struct macro_source_file *current_file = 0; | |
18641 | enum dwarf_macro_record_type macinfo_type; | |
18642 | unsigned int offset_size = cu->header.offset_size; | |
18643 | gdb_byte *opcode_definitions[256]; | |
8fc3fc34 TT |
18644 | struct cleanup *cleanup; |
18645 | htab_t include_hash; | |
18646 | void **slot; | |
09262596 DE |
18647 | struct dwarf2_section_info *section; |
18648 | const char *section_name; | |
18649 | ||
18650 | if (cu->dwo_unit != NULL) | |
18651 | { | |
18652 | if (section_is_gnu) | |
18653 | { | |
18654 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
18655 | section_name = ".debug_macro.dwo"; | |
18656 | } | |
18657 | else | |
18658 | { | |
18659 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
18660 | section_name = ".debug_macinfo.dwo"; | |
18661 | } | |
18662 | } | |
18663 | else | |
18664 | { | |
18665 | if (section_is_gnu) | |
18666 | { | |
18667 | section = &dwarf2_per_objfile->macro; | |
18668 | section_name = ".debug_macro"; | |
18669 | } | |
18670 | else | |
18671 | { | |
18672 | section = &dwarf2_per_objfile->macinfo; | |
18673 | section_name = ".debug_macinfo"; | |
18674 | } | |
18675 | } | |
cf2c3c16 | 18676 | |
bb5ed363 | 18677 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
18678 | if (section->buffer == NULL) |
18679 | { | |
fceca515 | 18680 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
18681 | return; |
18682 | } | |
09262596 | 18683 | abfd = section->asection->owner; |
cf2c3c16 TT |
18684 | |
18685 | /* First pass: Find the name of the base filename. | |
18686 | This filename is needed in order to process all macros whose definition | |
18687 | (or undefinition) comes from the command line. These macros are defined | |
18688 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
18689 | associated to the base file. | |
18690 | ||
18691 | To determine the base file name, we scan the macro definitions until we | |
18692 | reach the first DW_MACINFO_start_file entry. We then initialize | |
18693 | CURRENT_FILE accordingly so that any macro definition found before the | |
18694 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
18695 | ||
18696 | mac_ptr = section->buffer + offset; | |
18697 | mac_end = section->buffer + section->size; | |
18698 | ||
18699 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
18700 | &offset_size, section_is_gnu); | |
18701 | if (mac_ptr == NULL) | |
18702 | { | |
18703 | /* We already issued a complaint. */ | |
18704 | return; | |
18705 | } | |
18706 | ||
18707 | do | |
18708 | { | |
18709 | /* Do we at least have room for a macinfo type byte? */ | |
18710 | if (mac_ptr >= mac_end) | |
18711 | { | |
18712 | /* Complaint is printed during the second pass as GDB will probably | |
18713 | stop the first pass earlier upon finding | |
18714 | DW_MACINFO_start_file. */ | |
18715 | break; | |
18716 | } | |
18717 | ||
18718 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
18719 | mac_ptr++; | |
18720 | ||
18721 | /* Note that we rely on the fact that the corresponding GNU and | |
18722 | DWARF constants are the same. */ | |
18723 | switch (macinfo_type) | |
18724 | { | |
18725 | /* A zero macinfo type indicates the end of the macro | |
18726 | information. */ | |
18727 | case 0: | |
18728 | break; | |
18729 | ||
18730 | case DW_MACRO_GNU_define: | |
18731 | case DW_MACRO_GNU_undef: | |
18732 | /* Only skip the data by MAC_PTR. */ | |
18733 | { | |
18734 | unsigned int bytes_read; | |
18735 | ||
18736 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18737 | mac_ptr += bytes_read; | |
18738 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
18739 | mac_ptr += bytes_read; | |
18740 | } | |
18741 | break; | |
18742 | ||
18743 | case DW_MACRO_GNU_start_file: | |
18744 | { | |
18745 | unsigned int bytes_read; | |
18746 | int line, file; | |
18747 | ||
18748 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18749 | mac_ptr += bytes_read; | |
18750 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18751 | mac_ptr += bytes_read; | |
18752 | ||
18753 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 18754 | comp_dir, lh, objfile); |
cf2c3c16 TT |
18755 | } |
18756 | break; | |
18757 | ||
18758 | case DW_MACRO_GNU_end_file: | |
18759 | /* No data to skip by MAC_PTR. */ | |
18760 | break; | |
18761 | ||
18762 | case DW_MACRO_GNU_define_indirect: | |
18763 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
18764 | case DW_MACRO_GNU_define_indirect_alt: |
18765 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
18766 | { |
18767 | unsigned int bytes_read; | |
18768 | ||
18769 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18770 | mac_ptr += bytes_read; | |
18771 | mac_ptr += offset_size; | |
18772 | } | |
18773 | break; | |
18774 | ||
18775 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 18776 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
18777 | /* Note that, according to the spec, a transparent include |
18778 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
18779 | skip this opcode. */ | |
18780 | mac_ptr += offset_size; | |
18781 | break; | |
18782 | ||
18783 | case DW_MACINFO_vendor_ext: | |
18784 | /* Only skip the data by MAC_PTR. */ | |
18785 | if (!section_is_gnu) | |
18786 | { | |
18787 | unsigned int bytes_read; | |
18788 | ||
18789 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18790 | mac_ptr += bytes_read; | |
18791 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
18792 | mac_ptr += bytes_read; | |
18793 | } | |
18794 | /* FALLTHROUGH */ | |
18795 | ||
18796 | default: | |
18797 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 18798 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
18799 | section); |
18800 | if (mac_ptr == NULL) | |
18801 | return; | |
18802 | break; | |
18803 | } | |
18804 | } while (macinfo_type != 0 && current_file == NULL); | |
18805 | ||
18806 | /* Second pass: Process all entries. | |
18807 | ||
18808 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
18809 | command-line macro definitions/undefinitions. This flag is unset when we | |
18810 | reach the first DW_MACINFO_start_file entry. */ | |
18811 | ||
8fc3fc34 TT |
18812 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
18813 | NULL, xcalloc, xfree); | |
18814 | cleanup = make_cleanup_htab_delete (include_hash); | |
18815 | mac_ptr = section->buffer + offset; | |
18816 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
18817 | *slot = mac_ptr; | |
18818 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, | |
36586728 TT |
18819 | current_file, lh, comp_dir, section, |
18820 | section_is_gnu, 0, | |
8fc3fc34 TT |
18821 | offset_size, objfile, include_hash); |
18822 | do_cleanups (cleanup); | |
cf2c3c16 TT |
18823 | } |
18824 | ||
8e19ed76 | 18825 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 18826 | if so return true else false. */ |
380bca97 | 18827 | |
8e19ed76 PS |
18828 | static int |
18829 | attr_form_is_block (struct attribute *attr) | |
18830 | { | |
18831 | return (attr == NULL ? 0 : | |
18832 | attr->form == DW_FORM_block1 | |
18833 | || attr->form == DW_FORM_block2 | |
18834 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
18835 | || attr->form == DW_FORM_block |
18836 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 18837 | } |
4c2df51b | 18838 | |
c6a0999f JB |
18839 | /* Return non-zero if ATTR's value is a section offset --- classes |
18840 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
18841 | You may use DW_UNSND (attr) to retrieve such offsets. | |
18842 | ||
18843 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
18844 | may have a value that belongs to more than one of these classes; it | |
18845 | would be ambiguous if we did, because we use the same forms for all | |
18846 | of them. */ | |
380bca97 | 18847 | |
3690dd37 JB |
18848 | static int |
18849 | attr_form_is_section_offset (struct attribute *attr) | |
18850 | { | |
18851 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
18852 | || attr->form == DW_FORM_data8 |
18853 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
18854 | } |
18855 | ||
3690dd37 JB |
18856 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
18857 | zero otherwise. When this function returns true, you can apply | |
18858 | dwarf2_get_attr_constant_value to it. | |
18859 | ||
18860 | However, note that for some attributes you must check | |
18861 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
18862 | and DW_FORM_data8 are members of both the constant class, and of | |
18863 | the classes that contain offsets into other debug sections | |
18864 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
18865 | that, if an attribute's can be either a constant or one of the | |
18866 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
18867 | taken as section offsets, not constants. */ | |
380bca97 | 18868 | |
3690dd37 JB |
18869 | static int |
18870 | attr_form_is_constant (struct attribute *attr) | |
18871 | { | |
18872 | switch (attr->form) | |
18873 | { | |
18874 | case DW_FORM_sdata: | |
18875 | case DW_FORM_udata: | |
18876 | case DW_FORM_data1: | |
18877 | case DW_FORM_data2: | |
18878 | case DW_FORM_data4: | |
18879 | case DW_FORM_data8: | |
18880 | return 1; | |
18881 | default: | |
18882 | return 0; | |
18883 | } | |
18884 | } | |
18885 | ||
3019eac3 DE |
18886 | /* Return the .debug_loc section to use for CU. |
18887 | For DWO files use .debug_loc.dwo. */ | |
18888 | ||
18889 | static struct dwarf2_section_info * | |
18890 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
18891 | { | |
18892 | if (cu->dwo_unit) | |
18893 | return &cu->dwo_unit->dwo_file->sections.loc; | |
18894 | return &dwarf2_per_objfile->loc; | |
18895 | } | |
18896 | ||
8cf6f0b1 TT |
18897 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
18898 | ||
18899 | static void | |
18900 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
18901 | struct dwarf2_loclist_baton *baton, | |
18902 | struct attribute *attr) | |
18903 | { | |
3019eac3 DE |
18904 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
18905 | ||
18906 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
18907 | |
18908 | baton->per_cu = cu->per_cu; | |
18909 | gdb_assert (baton->per_cu); | |
18910 | /* We don't know how long the location list is, but make sure we | |
18911 | don't run off the edge of the section. */ | |
3019eac3 DE |
18912 | baton->size = section->size - DW_UNSND (attr); |
18913 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 18914 | baton->base_address = cu->base_address; |
f664829e | 18915 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
18916 | } |
18917 | ||
4c2df51b DJ |
18918 | static void |
18919 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 18920 | struct dwarf2_cu *cu) |
4c2df51b | 18921 | { |
bb5ed363 | 18922 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 18923 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 18924 | |
3690dd37 | 18925 | if (attr_form_is_section_offset (attr) |
3019eac3 | 18926 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
18927 | the section. If so, fall through to the complaint in the |
18928 | other branch. */ | |
3019eac3 | 18929 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 18930 | { |
0d53c4c4 | 18931 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 18932 | |
bb5ed363 | 18933 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 18934 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 18935 | |
8cf6f0b1 | 18936 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 18937 | |
d00adf39 | 18938 | if (cu->base_known == 0) |
0d53c4c4 | 18939 | complaint (&symfile_complaints, |
3e43a32a MS |
18940 | _("Location list used without " |
18941 | "specifying the CU base address.")); | |
4c2df51b | 18942 | |
768a979c | 18943 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_loclist_funcs; |
0d53c4c4 DJ |
18944 | SYMBOL_LOCATION_BATON (sym) = baton; |
18945 | } | |
18946 | else | |
18947 | { | |
18948 | struct dwarf2_locexpr_baton *baton; | |
18949 | ||
bb5ed363 | 18950 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 18951 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
18952 | baton->per_cu = cu->per_cu; |
18953 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
18954 | |
18955 | if (attr_form_is_block (attr)) | |
18956 | { | |
18957 | /* Note that we're just copying the block's data pointer | |
18958 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
18959 | info_buffer for SYM's objfile; right now we never release |
18960 | that buffer, but when we do clean up properly this may | |
18961 | need to change. */ | |
0d53c4c4 DJ |
18962 | baton->size = DW_BLOCK (attr)->size; |
18963 | baton->data = DW_BLOCK (attr)->data; | |
18964 | } | |
18965 | else | |
18966 | { | |
18967 | dwarf2_invalid_attrib_class_complaint ("location description", | |
18968 | SYMBOL_NATURAL_NAME (sym)); | |
18969 | baton->size = 0; | |
0d53c4c4 | 18970 | } |
6e70227d | 18971 | |
768a979c | 18972 | SYMBOL_COMPUTED_OPS (sym) = &dwarf2_locexpr_funcs; |
0d53c4c4 DJ |
18973 | SYMBOL_LOCATION_BATON (sym) = baton; |
18974 | } | |
4c2df51b | 18975 | } |
6502dd73 | 18976 | |
9aa1f1e3 TT |
18977 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
18978 | came from a separate debuginfo file, then the master objfile is | |
18979 | returned. */ | |
ae0d2f24 UW |
18980 | |
18981 | struct objfile * | |
18982 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
18983 | { | |
9291a0cd | 18984 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
18985 | |
18986 | /* Return the master objfile, so that we can report and look up the | |
18987 | correct file containing this variable. */ | |
18988 | if (objfile->separate_debug_objfile_backlink) | |
18989 | objfile = objfile->separate_debug_objfile_backlink; | |
18990 | ||
18991 | return objfile; | |
18992 | } | |
18993 | ||
96408a79 SA |
18994 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
18995 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
18996 | CU_HEADERP first. */ | |
18997 | ||
18998 | static const struct comp_unit_head * | |
18999 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
19000 | struct dwarf2_per_cu_data *per_cu) | |
19001 | { | |
96408a79 SA |
19002 | gdb_byte *info_ptr; |
19003 | ||
19004 | if (per_cu->cu) | |
19005 | return &per_cu->cu->header; | |
19006 | ||
0bc3a05c | 19007 | info_ptr = per_cu->info_or_types_section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
19008 | |
19009 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 19010 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
19011 | |
19012 | return cu_headerp; | |
19013 | } | |
19014 | ||
ae0d2f24 UW |
19015 | /* Return the address size given in the compilation unit header for CU. */ |
19016 | ||
98714339 | 19017 | int |
ae0d2f24 UW |
19018 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
19019 | { | |
96408a79 SA |
19020 | struct comp_unit_head cu_header_local; |
19021 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 19022 | |
96408a79 SA |
19023 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
19024 | ||
19025 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
19026 | } |
19027 | ||
9eae7c52 TT |
19028 | /* Return the offset size given in the compilation unit header for CU. */ |
19029 | ||
19030 | int | |
19031 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
19032 | { | |
96408a79 SA |
19033 | struct comp_unit_head cu_header_local; |
19034 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 19035 | |
96408a79 SA |
19036 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
19037 | ||
19038 | return cu_headerp->offset_size; | |
19039 | } | |
19040 | ||
19041 | /* See its dwarf2loc.h declaration. */ | |
19042 | ||
19043 | int | |
19044 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
19045 | { | |
19046 | struct comp_unit_head cu_header_local; | |
19047 | const struct comp_unit_head *cu_headerp; | |
19048 | ||
19049 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
19050 | ||
19051 | if (cu_headerp->version == 2) | |
19052 | return cu_headerp->addr_size; | |
19053 | else | |
19054 | return cu_headerp->offset_size; | |
181cebd4 JK |
19055 | } |
19056 | ||
9aa1f1e3 TT |
19057 | /* Return the text offset of the CU. The returned offset comes from |
19058 | this CU's objfile. If this objfile came from a separate debuginfo | |
19059 | file, then the offset may be different from the corresponding | |
19060 | offset in the parent objfile. */ | |
19061 | ||
19062 | CORE_ADDR | |
19063 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
19064 | { | |
bb3fa9d0 | 19065 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
19066 | |
19067 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
19068 | } | |
19069 | ||
348e048f DE |
19070 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
19071 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
19072 | |
19073 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 19074 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 19075 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
19076 | struct objfile *objfile) |
19077 | { | |
19078 | struct dwarf2_per_cu_data *this_cu; | |
19079 | int low, high; | |
36586728 | 19080 | const sect_offset *cu_off; |
ae038cb0 | 19081 | |
ae038cb0 DJ |
19082 | low = 0; |
19083 | high = dwarf2_per_objfile->n_comp_units - 1; | |
19084 | while (high > low) | |
19085 | { | |
36586728 | 19086 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 19087 | int mid = low + (high - low) / 2; |
9a619af0 | 19088 | |
36586728 TT |
19089 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
19090 | cu_off = &mid_cu->offset; | |
19091 | if (mid_cu->is_dwz > offset_in_dwz | |
19092 | || (mid_cu->is_dwz == offset_in_dwz | |
19093 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
19094 | high = mid; |
19095 | else | |
19096 | low = mid + 1; | |
19097 | } | |
19098 | gdb_assert (low == high); | |
36586728 TT |
19099 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
19100 | cu_off = &this_cu->offset; | |
19101 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 19102 | { |
36586728 | 19103 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
19104 | error (_("Dwarf Error: could not find partial DIE containing " |
19105 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 19106 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 19107 | |
b64f50a1 JK |
19108 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
19109 | <= offset.sect_off); | |
ae038cb0 DJ |
19110 | return dwarf2_per_objfile->all_comp_units[low-1]; |
19111 | } | |
19112 | else | |
19113 | { | |
19114 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
19115 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
19116 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
19117 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
19118 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
19119 | return this_cu; |
19120 | } | |
19121 | } | |
19122 | ||
23745b47 | 19123 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 19124 | |
9816fde3 | 19125 | static void |
23745b47 | 19126 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 19127 | { |
9816fde3 | 19128 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
19129 | per_cu->cu = cu; |
19130 | cu->per_cu = per_cu; | |
19131 | cu->objfile = per_cu->objfile; | |
93311388 | 19132 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
19133 | } |
19134 | ||
19135 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
19136 | ||
19137 | static void | |
95554aad TT |
19138 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
19139 | enum language pretend_language) | |
9816fde3 JK |
19140 | { |
19141 | struct attribute *attr; | |
19142 | ||
19143 | /* Set the language we're debugging. */ | |
19144 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
19145 | if (attr) | |
19146 | set_cu_language (DW_UNSND (attr), cu); | |
19147 | else | |
9cded63f | 19148 | { |
95554aad | 19149 | cu->language = pretend_language; |
9cded63f TT |
19150 | cu->language_defn = language_def (cu->language); |
19151 | } | |
dee91e82 DE |
19152 | |
19153 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
19154 | if (attr) | |
19155 | cu->producer = DW_STRING (attr); | |
93311388 DE |
19156 | } |
19157 | ||
ae038cb0 DJ |
19158 | /* Release one cached compilation unit, CU. We unlink it from the tree |
19159 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
19160 | the caller is responsible for that. |
19161 | NOTE: DATA is a void * because this function is also used as a | |
19162 | cleanup routine. */ | |
ae038cb0 DJ |
19163 | |
19164 | static void | |
68dc6402 | 19165 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
19166 | { |
19167 | struct dwarf2_cu *cu = data; | |
19168 | ||
23745b47 DE |
19169 | gdb_assert (cu->per_cu != NULL); |
19170 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
19171 | cu->per_cu = NULL; |
19172 | ||
19173 | obstack_free (&cu->comp_unit_obstack, NULL); | |
19174 | ||
19175 | xfree (cu); | |
19176 | } | |
19177 | ||
72bf9492 | 19178 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 19179 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 19180 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
19181 | |
19182 | static void | |
19183 | free_stack_comp_unit (void *data) | |
19184 | { | |
19185 | struct dwarf2_cu *cu = data; | |
19186 | ||
23745b47 DE |
19187 | gdb_assert (cu->per_cu != NULL); |
19188 | cu->per_cu->cu = NULL; | |
19189 | cu->per_cu = NULL; | |
19190 | ||
72bf9492 DJ |
19191 | obstack_free (&cu->comp_unit_obstack, NULL); |
19192 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
19193 | } |
19194 | ||
19195 | /* Free all cached compilation units. */ | |
19196 | ||
19197 | static void | |
19198 | free_cached_comp_units (void *data) | |
19199 | { | |
19200 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19201 | ||
19202 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19203 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19204 | while (per_cu != NULL) | |
19205 | { | |
19206 | struct dwarf2_per_cu_data *next_cu; | |
19207 | ||
19208 | next_cu = per_cu->cu->read_in_chain; | |
19209 | ||
68dc6402 | 19210 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19211 | *last_chain = next_cu; |
19212 | ||
19213 | per_cu = next_cu; | |
19214 | } | |
19215 | } | |
19216 | ||
19217 | /* Increase the age counter on each cached compilation unit, and free | |
19218 | any that are too old. */ | |
19219 | ||
19220 | static void | |
19221 | age_cached_comp_units (void) | |
19222 | { | |
19223 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19224 | ||
19225 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
19226 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19227 | while (per_cu != NULL) | |
19228 | { | |
19229 | per_cu->cu->last_used ++; | |
19230 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
19231 | dwarf2_mark (per_cu->cu); | |
19232 | per_cu = per_cu->cu->read_in_chain; | |
19233 | } | |
19234 | ||
19235 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19236 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19237 | while (per_cu != NULL) | |
19238 | { | |
19239 | struct dwarf2_per_cu_data *next_cu; | |
19240 | ||
19241 | next_cu = per_cu->cu->read_in_chain; | |
19242 | ||
19243 | if (!per_cu->cu->mark) | |
19244 | { | |
68dc6402 | 19245 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19246 | *last_chain = next_cu; |
19247 | } | |
19248 | else | |
19249 | last_chain = &per_cu->cu->read_in_chain; | |
19250 | ||
19251 | per_cu = next_cu; | |
19252 | } | |
19253 | } | |
19254 | ||
19255 | /* Remove a single compilation unit from the cache. */ | |
19256 | ||
19257 | static void | |
dee91e82 | 19258 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
19259 | { |
19260 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19261 | ||
19262 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19263 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19264 | while (per_cu != NULL) | |
19265 | { | |
19266 | struct dwarf2_per_cu_data *next_cu; | |
19267 | ||
19268 | next_cu = per_cu->cu->read_in_chain; | |
19269 | ||
dee91e82 | 19270 | if (per_cu == target_per_cu) |
ae038cb0 | 19271 | { |
68dc6402 | 19272 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 19273 | per_cu->cu = NULL; |
ae038cb0 DJ |
19274 | *last_chain = next_cu; |
19275 | break; | |
19276 | } | |
19277 | else | |
19278 | last_chain = &per_cu->cu->read_in_chain; | |
19279 | ||
19280 | per_cu = next_cu; | |
19281 | } | |
19282 | } | |
19283 | ||
fe3e1990 DJ |
19284 | /* Release all extra memory associated with OBJFILE. */ |
19285 | ||
19286 | void | |
19287 | dwarf2_free_objfile (struct objfile *objfile) | |
19288 | { | |
19289 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
19290 | ||
19291 | if (dwarf2_per_objfile == NULL) | |
19292 | return; | |
19293 | ||
19294 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
19295 | free_cached_comp_units (NULL); | |
19296 | ||
7b9f3c50 DE |
19297 | if (dwarf2_per_objfile->quick_file_names_table) |
19298 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 19299 | |
fe3e1990 DJ |
19300 | /* Everything else should be on the objfile obstack. */ |
19301 | } | |
19302 | ||
dee91e82 DE |
19303 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
19304 | We store these in a hash table separate from the DIEs, and preserve them | |
19305 | when the DIEs are flushed out of cache. | |
19306 | ||
19307 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 DE |
19308 | uniquely identify the type. A file may have multiple .debug_types sections, |
19309 | or the type may come from a DWO file. We have to use something in | |
19310 | dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup | |
19311 | routine, get_die_type_at_offset, from outside this file, and thus won't | |
19312 | necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life | |
19313 | of the objfile. */ | |
1c379e20 | 19314 | |
dee91e82 | 19315 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 19316 | { |
dee91e82 | 19317 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 19318 | sect_offset offset; |
1c379e20 DJ |
19319 | struct type *type; |
19320 | }; | |
19321 | ||
dee91e82 | 19322 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19323 | |
19324 | static hashval_t | |
dee91e82 | 19325 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 19326 | { |
dee91e82 | 19327 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 19328 | |
dee91e82 | 19329 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
19330 | } |
19331 | ||
dee91e82 | 19332 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19333 | |
19334 | static int | |
dee91e82 | 19335 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 19336 | { |
dee91e82 DE |
19337 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
19338 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 19339 | |
dee91e82 DE |
19340 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
19341 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
19342 | } |
19343 | ||
19344 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
19345 | table if necessary. For convenience, return TYPE. |
19346 | ||
19347 | The DIEs reading must have careful ordering to: | |
19348 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
19349 | reading current DIE. | |
19350 | * Not trying to dereference contents of still incompletely read in types | |
19351 | while reading in other DIEs. | |
19352 | * Enable referencing still incompletely read in types just by a pointer to | |
19353 | the type without accessing its fields. | |
19354 | ||
19355 | Therefore caller should follow these rules: | |
19356 | * Try to fetch any prerequisite types we may need to build this DIE type | |
19357 | before building the type and calling set_die_type. | |
e71ec853 | 19358 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
19359 | possible before fetching more types to complete the current type. |
19360 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 19361 | |
f792889a | 19362 | static struct type * |
1c379e20 DJ |
19363 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
19364 | { | |
dee91e82 | 19365 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 19366 | struct objfile *objfile = cu->objfile; |
1c379e20 | 19367 | |
b4ba55a1 JB |
19368 | /* For Ada types, make sure that the gnat-specific data is always |
19369 | initialized (if not already set). There are a few types where | |
19370 | we should not be doing so, because the type-specific area is | |
19371 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
19372 | where the type-specific area is used to store the floatformat). | |
19373 | But this is not a problem, because the gnat-specific information | |
19374 | is actually not needed for these types. */ | |
19375 | if (need_gnat_info (cu) | |
19376 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
19377 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
19378 | && !HAVE_GNAT_AUX_INFO (type)) | |
19379 | INIT_GNAT_SPECIFIC (type); | |
19380 | ||
dee91e82 | 19381 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19382 | { |
dee91e82 DE |
19383 | dwarf2_per_objfile->die_type_hash = |
19384 | htab_create_alloc_ex (127, | |
19385 | per_cu_offset_and_type_hash, | |
19386 | per_cu_offset_and_type_eq, | |
19387 | NULL, | |
19388 | &objfile->objfile_obstack, | |
19389 | hashtab_obstack_allocate, | |
19390 | dummy_obstack_deallocate); | |
f792889a | 19391 | } |
1c379e20 | 19392 | |
dee91e82 | 19393 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
19394 | ofs.offset = die->offset; |
19395 | ofs.type = type; | |
dee91e82 DE |
19396 | slot = (struct dwarf2_per_cu_offset_and_type **) |
19397 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
19398 | if (*slot) |
19399 | complaint (&symfile_complaints, | |
19400 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 19401 | die->offset.sect_off); |
673bfd45 | 19402 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 19403 | **slot = ofs; |
f792889a | 19404 | return type; |
1c379e20 DJ |
19405 | } |
19406 | ||
380bca97 | 19407 | /* Look up the type for the die at OFFSET in the appropriate type_hash |
673bfd45 | 19408 | table, or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
19409 | |
19410 | static struct type * | |
b64f50a1 | 19411 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 19412 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 19413 | { |
dee91e82 | 19414 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 19415 | |
dee91e82 | 19416 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19417 | return NULL; |
1c379e20 | 19418 | |
dee91e82 | 19419 | ofs.per_cu = per_cu; |
673bfd45 | 19420 | ofs.offset = offset; |
dee91e82 | 19421 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
19422 | if (slot) |
19423 | return slot->type; | |
19424 | else | |
19425 | return NULL; | |
19426 | } | |
19427 | ||
673bfd45 DE |
19428 | /* Look up the type for DIE in the appropriate type_hash table, |
19429 | or return NULL if DIE does not have a saved type. */ | |
19430 | ||
19431 | static struct type * | |
19432 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
19433 | { | |
19434 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
19435 | } | |
19436 | ||
10b3939b DJ |
19437 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
19438 | ||
19439 | static void | |
19440 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
19441 | struct dwarf2_per_cu_data *ref_per_cu) | |
19442 | { | |
19443 | void **slot; | |
19444 | ||
19445 | if (cu->dependencies == NULL) | |
19446 | cu->dependencies | |
19447 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
19448 | NULL, &cu->comp_unit_obstack, | |
19449 | hashtab_obstack_allocate, | |
19450 | dummy_obstack_deallocate); | |
19451 | ||
19452 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
19453 | if (*slot == NULL) | |
19454 | *slot = ref_per_cu; | |
19455 | } | |
1c379e20 | 19456 | |
f504f079 DE |
19457 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
19458 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
19459 | cache that we must keep because we are keeping CU. */ |
19460 | ||
10b3939b DJ |
19461 | static int |
19462 | dwarf2_mark_helper (void **slot, void *data) | |
19463 | { | |
19464 | struct dwarf2_per_cu_data *per_cu; | |
19465 | ||
19466 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
19467 | |
19468 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
19469 | reading of the chain. As such dependencies remain valid it is not much | |
19470 | useful to track and undo them during QUIT cleanups. */ | |
19471 | if (per_cu->cu == NULL) | |
19472 | return 1; | |
19473 | ||
10b3939b DJ |
19474 | if (per_cu->cu->mark) |
19475 | return 1; | |
19476 | per_cu->cu->mark = 1; | |
19477 | ||
19478 | if (per_cu->cu->dependencies != NULL) | |
19479 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
19480 | ||
19481 | return 1; | |
19482 | } | |
19483 | ||
f504f079 DE |
19484 | /* Set the mark field in CU and in every other compilation unit in the |
19485 | cache that we must keep because we are keeping CU. */ | |
19486 | ||
ae038cb0 DJ |
19487 | static void |
19488 | dwarf2_mark (struct dwarf2_cu *cu) | |
19489 | { | |
19490 | if (cu->mark) | |
19491 | return; | |
19492 | cu->mark = 1; | |
10b3939b DJ |
19493 | if (cu->dependencies != NULL) |
19494 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
19495 | } |
19496 | ||
19497 | static void | |
19498 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
19499 | { | |
19500 | while (per_cu) | |
19501 | { | |
19502 | per_cu->cu->mark = 0; | |
19503 | per_cu = per_cu->cu->read_in_chain; | |
19504 | } | |
72bf9492 DJ |
19505 | } |
19506 | ||
72bf9492 DJ |
19507 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
19508 | is its offset in .debug_info for this objfile. */ | |
19509 | ||
19510 | static hashval_t | |
19511 | partial_die_hash (const void *item) | |
19512 | { | |
19513 | const struct partial_die_info *part_die = item; | |
9a619af0 | 19514 | |
b64f50a1 | 19515 | return part_die->offset.sect_off; |
72bf9492 DJ |
19516 | } |
19517 | ||
19518 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
19519 | are equal if they have the same offset. */ | |
19520 | ||
19521 | static int | |
19522 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
19523 | { | |
19524 | const struct partial_die_info *part_die_lhs = item_lhs; | |
19525 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 19526 | |
b64f50a1 | 19527 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
19528 | } |
19529 | ||
ae038cb0 DJ |
19530 | static struct cmd_list_element *set_dwarf2_cmdlist; |
19531 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
19532 | ||
19533 | static void | |
19534 | set_dwarf2_cmd (char *args, int from_tty) | |
19535 | { | |
19536 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
19537 | } | |
19538 | ||
19539 | static void | |
19540 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 19541 | { |
ae038cb0 DJ |
19542 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
19543 | } | |
19544 | ||
4bf44c1c | 19545 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
19546 | |
19547 | static void | |
c1bd65d0 | 19548 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
19549 | { |
19550 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 19551 | int ix; |
8b70b953 | 19552 | |
95554aad TT |
19553 | for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix) |
19554 | VEC_free (dwarf2_per_cu_ptr, | |
f4dc4d17 | 19555 | dwarf2_per_objfile->all_comp_units[ix]->s.imported_symtabs); |
95554aad | 19556 | |
8b70b953 | 19557 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
19558 | |
19559 | if (data->dwo_files) | |
19560 | free_dwo_files (data->dwo_files, objfile); | |
36586728 TT |
19561 | |
19562 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
19563 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
19564 | } |
19565 | ||
19566 | \f | |
ae2de4f8 | 19567 | /* The "save gdb-index" command. */ |
9291a0cd TT |
19568 | |
19569 | /* The contents of the hash table we create when building the string | |
19570 | table. */ | |
19571 | struct strtab_entry | |
19572 | { | |
19573 | offset_type offset; | |
19574 | const char *str; | |
19575 | }; | |
19576 | ||
559a7a62 JK |
19577 | /* Hash function for a strtab_entry. |
19578 | ||
19579 | Function is used only during write_hash_table so no index format backward | |
19580 | compatibility is needed. */ | |
b89be57b | 19581 | |
9291a0cd TT |
19582 | static hashval_t |
19583 | hash_strtab_entry (const void *e) | |
19584 | { | |
19585 | const struct strtab_entry *entry = e; | |
559a7a62 | 19586 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
19587 | } |
19588 | ||
19589 | /* Equality function for a strtab_entry. */ | |
b89be57b | 19590 | |
9291a0cd TT |
19591 | static int |
19592 | eq_strtab_entry (const void *a, const void *b) | |
19593 | { | |
19594 | const struct strtab_entry *ea = a; | |
19595 | const struct strtab_entry *eb = b; | |
19596 | return !strcmp (ea->str, eb->str); | |
19597 | } | |
19598 | ||
19599 | /* Create a strtab_entry hash table. */ | |
b89be57b | 19600 | |
9291a0cd TT |
19601 | static htab_t |
19602 | create_strtab (void) | |
19603 | { | |
19604 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
19605 | xfree, xcalloc, xfree); | |
19606 | } | |
19607 | ||
19608 | /* Add a string to the constant pool. Return the string's offset in | |
19609 | host order. */ | |
b89be57b | 19610 | |
9291a0cd TT |
19611 | static offset_type |
19612 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
19613 | { | |
19614 | void **slot; | |
19615 | struct strtab_entry entry; | |
19616 | struct strtab_entry *result; | |
19617 | ||
19618 | entry.str = str; | |
19619 | slot = htab_find_slot (table, &entry, INSERT); | |
19620 | if (*slot) | |
19621 | result = *slot; | |
19622 | else | |
19623 | { | |
19624 | result = XNEW (struct strtab_entry); | |
19625 | result->offset = obstack_object_size (cpool); | |
19626 | result->str = str; | |
19627 | obstack_grow_str0 (cpool, str); | |
19628 | *slot = result; | |
19629 | } | |
19630 | return result->offset; | |
19631 | } | |
19632 | ||
19633 | /* An entry in the symbol table. */ | |
19634 | struct symtab_index_entry | |
19635 | { | |
19636 | /* The name of the symbol. */ | |
19637 | const char *name; | |
19638 | /* The offset of the name in the constant pool. */ | |
19639 | offset_type index_offset; | |
19640 | /* A sorted vector of the indices of all the CUs that hold an object | |
19641 | of this name. */ | |
19642 | VEC (offset_type) *cu_indices; | |
19643 | }; | |
19644 | ||
19645 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
19646 | struct mapped_symtab | |
19647 | { | |
19648 | offset_type n_elements; | |
19649 | offset_type size; | |
19650 | struct symtab_index_entry **data; | |
19651 | }; | |
19652 | ||
19653 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 19654 | |
9291a0cd TT |
19655 | static hashval_t |
19656 | hash_symtab_entry (const void *e) | |
19657 | { | |
19658 | const struct symtab_index_entry *entry = e; | |
19659 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
19660 | sizeof (offset_type) * VEC_length (offset_type, | |
19661 | entry->cu_indices), | |
19662 | 0); | |
19663 | } | |
19664 | ||
19665 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 19666 | |
9291a0cd TT |
19667 | static int |
19668 | eq_symtab_entry (const void *a, const void *b) | |
19669 | { | |
19670 | const struct symtab_index_entry *ea = a; | |
19671 | const struct symtab_index_entry *eb = b; | |
19672 | int len = VEC_length (offset_type, ea->cu_indices); | |
19673 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
19674 | return 0; | |
19675 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
19676 | VEC_address (offset_type, eb->cu_indices), | |
19677 | sizeof (offset_type) * len); | |
19678 | } | |
19679 | ||
19680 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 19681 | |
9291a0cd TT |
19682 | static void |
19683 | delete_symtab_entry (void *p) | |
19684 | { | |
19685 | struct symtab_index_entry *entry = p; | |
19686 | VEC_free (offset_type, entry->cu_indices); | |
19687 | xfree (entry); | |
19688 | } | |
19689 | ||
19690 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 19691 | |
9291a0cd | 19692 | static htab_t |
3876f04e | 19693 | create_symbol_hash_table (void) |
9291a0cd TT |
19694 | { |
19695 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
19696 | delete_symtab_entry, xcalloc, xfree); | |
19697 | } | |
19698 | ||
19699 | /* Create a new mapped symtab object. */ | |
b89be57b | 19700 | |
9291a0cd TT |
19701 | static struct mapped_symtab * |
19702 | create_mapped_symtab (void) | |
19703 | { | |
19704 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
19705 | symtab->n_elements = 0; | |
19706 | symtab->size = 1024; | |
19707 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
19708 | return symtab; | |
19709 | } | |
19710 | ||
19711 | /* Destroy a mapped_symtab. */ | |
b89be57b | 19712 | |
9291a0cd TT |
19713 | static void |
19714 | cleanup_mapped_symtab (void *p) | |
19715 | { | |
19716 | struct mapped_symtab *symtab = p; | |
19717 | /* The contents of the array are freed when the other hash table is | |
19718 | destroyed. */ | |
19719 | xfree (symtab->data); | |
19720 | xfree (symtab); | |
19721 | } | |
19722 | ||
19723 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
19724 | the slot. |
19725 | ||
19726 | Function is used only during write_hash_table so no index format backward | |
19727 | compatibility is needed. */ | |
b89be57b | 19728 | |
9291a0cd TT |
19729 | static struct symtab_index_entry ** |
19730 | find_slot (struct mapped_symtab *symtab, const char *name) | |
19731 | { | |
559a7a62 | 19732 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
19733 | |
19734 | index = hash & (symtab->size - 1); | |
19735 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
19736 | ||
19737 | for (;;) | |
19738 | { | |
19739 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
19740 | return &symtab->data[index]; | |
19741 | index = (index + step) & (symtab->size - 1); | |
19742 | } | |
19743 | } | |
19744 | ||
19745 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 19746 | |
9291a0cd TT |
19747 | static void |
19748 | hash_expand (struct mapped_symtab *symtab) | |
19749 | { | |
19750 | offset_type old_size = symtab->size; | |
19751 | offset_type i; | |
19752 | struct symtab_index_entry **old_entries = symtab->data; | |
19753 | ||
19754 | symtab->size *= 2; | |
19755 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
19756 | ||
19757 | for (i = 0; i < old_size; ++i) | |
19758 | { | |
19759 | if (old_entries[i]) | |
19760 | { | |
19761 | struct symtab_index_entry **slot = find_slot (symtab, | |
19762 | old_entries[i]->name); | |
19763 | *slot = old_entries[i]; | |
19764 | } | |
19765 | } | |
19766 | ||
19767 | xfree (old_entries); | |
19768 | } | |
19769 | ||
156942c7 DE |
19770 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
19771 | CU_INDEX is the index of the CU in which the symbol appears. | |
19772 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 19773 | |
9291a0cd TT |
19774 | static void |
19775 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 19776 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
19777 | offset_type cu_index) |
19778 | { | |
19779 | struct symtab_index_entry **slot; | |
156942c7 | 19780 | offset_type cu_index_and_attrs; |
9291a0cd TT |
19781 | |
19782 | ++symtab->n_elements; | |
19783 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
19784 | hash_expand (symtab); | |
19785 | ||
19786 | slot = find_slot (symtab, name); | |
19787 | if (!*slot) | |
19788 | { | |
19789 | *slot = XNEW (struct symtab_index_entry); | |
19790 | (*slot)->name = name; | |
156942c7 | 19791 | /* index_offset is set later. */ |
9291a0cd TT |
19792 | (*slot)->cu_indices = NULL; |
19793 | } | |
156942c7 DE |
19794 | |
19795 | cu_index_and_attrs = 0; | |
19796 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
19797 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
19798 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
19799 | ||
19800 | /* We don't want to record an index value twice as we want to avoid the | |
19801 | duplication. | |
19802 | We process all global symbols and then all static symbols | |
19803 | (which would allow us to avoid the duplication by only having to check | |
19804 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
19805 | To keep things simple we don't worry about the duplication here and | |
19806 | sort and uniqufy the list after we've processed all symbols. */ | |
19807 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
19808 | } | |
19809 | ||
19810 | /* qsort helper routine for uniquify_cu_indices. */ | |
19811 | ||
19812 | static int | |
19813 | offset_type_compare (const void *ap, const void *bp) | |
19814 | { | |
19815 | offset_type a = *(offset_type *) ap; | |
19816 | offset_type b = *(offset_type *) bp; | |
19817 | ||
19818 | return (a > b) - (b > a); | |
19819 | } | |
19820 | ||
19821 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
19822 | ||
19823 | static void | |
19824 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
19825 | { | |
19826 | int i; | |
19827 | ||
19828 | for (i = 0; i < symtab->size; ++i) | |
19829 | { | |
19830 | struct symtab_index_entry *entry = symtab->data[i]; | |
19831 | ||
19832 | if (entry | |
19833 | && entry->cu_indices != NULL) | |
19834 | { | |
19835 | unsigned int next_to_insert, next_to_check; | |
19836 | offset_type last_value; | |
19837 | ||
19838 | qsort (VEC_address (offset_type, entry->cu_indices), | |
19839 | VEC_length (offset_type, entry->cu_indices), | |
19840 | sizeof (offset_type), offset_type_compare); | |
19841 | ||
19842 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
19843 | next_to_insert = 1; | |
19844 | for (next_to_check = 1; | |
19845 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
19846 | ++next_to_check) | |
19847 | { | |
19848 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
19849 | != last_value) | |
19850 | { | |
19851 | last_value = VEC_index (offset_type, entry->cu_indices, | |
19852 | next_to_check); | |
19853 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
19854 | last_value); | |
19855 | ++next_to_insert; | |
19856 | } | |
19857 | } | |
19858 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
19859 | } | |
19860 | } | |
9291a0cd TT |
19861 | } |
19862 | ||
19863 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 19864 | |
9291a0cd | 19865 | static offset_type |
3876f04e | 19866 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
19867 | struct symtab_index_entry *entry) |
19868 | { | |
19869 | void **slot; | |
19870 | ||
3876f04e | 19871 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
19872 | if (!*slot) |
19873 | { | |
19874 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
19875 | offset_type val = MAYBE_SWAP (len); | |
19876 | offset_type iter; | |
19877 | int i; | |
19878 | ||
19879 | *slot = entry; | |
19880 | entry->index_offset = obstack_object_size (cpool); | |
19881 | ||
19882 | obstack_grow (cpool, &val, sizeof (val)); | |
19883 | for (i = 0; | |
19884 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
19885 | ++i) | |
19886 | { | |
19887 | val = MAYBE_SWAP (iter); | |
19888 | obstack_grow (cpool, &val, sizeof (val)); | |
19889 | } | |
19890 | } | |
19891 | else | |
19892 | { | |
19893 | struct symtab_index_entry *old_entry = *slot; | |
19894 | entry->index_offset = old_entry->index_offset; | |
19895 | entry = old_entry; | |
19896 | } | |
19897 | return entry->index_offset; | |
19898 | } | |
19899 | ||
19900 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
19901 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 19902 | |
9291a0cd TT |
19903 | static void |
19904 | write_hash_table (struct mapped_symtab *symtab, | |
19905 | struct obstack *output, struct obstack *cpool) | |
19906 | { | |
19907 | offset_type i; | |
3876f04e | 19908 | htab_t symbol_hash_table; |
9291a0cd TT |
19909 | htab_t str_table; |
19910 | ||
3876f04e | 19911 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 19912 | str_table = create_strtab (); |
3876f04e | 19913 | |
9291a0cd TT |
19914 | /* We add all the index vectors to the constant pool first, to |
19915 | ensure alignment is ok. */ | |
19916 | for (i = 0; i < symtab->size; ++i) | |
19917 | { | |
19918 | if (symtab->data[i]) | |
3876f04e | 19919 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
19920 | } |
19921 | ||
19922 | /* Now write out the hash table. */ | |
19923 | for (i = 0; i < symtab->size; ++i) | |
19924 | { | |
19925 | offset_type str_off, vec_off; | |
19926 | ||
19927 | if (symtab->data[i]) | |
19928 | { | |
19929 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
19930 | vec_off = symtab->data[i]->index_offset; | |
19931 | } | |
19932 | else | |
19933 | { | |
19934 | /* While 0 is a valid constant pool index, it is not valid | |
19935 | to have 0 for both offsets. */ | |
19936 | str_off = 0; | |
19937 | vec_off = 0; | |
19938 | } | |
19939 | ||
19940 | str_off = MAYBE_SWAP (str_off); | |
19941 | vec_off = MAYBE_SWAP (vec_off); | |
19942 | ||
19943 | obstack_grow (output, &str_off, sizeof (str_off)); | |
19944 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
19945 | } | |
19946 | ||
19947 | htab_delete (str_table); | |
3876f04e | 19948 | htab_delete (symbol_hash_table); |
9291a0cd TT |
19949 | } |
19950 | ||
0a5429f6 DE |
19951 | /* Struct to map psymtab to CU index in the index file. */ |
19952 | struct psymtab_cu_index_map | |
19953 | { | |
19954 | struct partial_symtab *psymtab; | |
19955 | unsigned int cu_index; | |
19956 | }; | |
19957 | ||
19958 | static hashval_t | |
19959 | hash_psymtab_cu_index (const void *item) | |
19960 | { | |
19961 | const struct psymtab_cu_index_map *map = item; | |
19962 | ||
19963 | return htab_hash_pointer (map->psymtab); | |
19964 | } | |
19965 | ||
19966 | static int | |
19967 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
19968 | { | |
19969 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
19970 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
19971 | ||
19972 | return lhs->psymtab == rhs->psymtab; | |
19973 | } | |
19974 | ||
19975 | /* Helper struct for building the address table. */ | |
19976 | struct addrmap_index_data | |
19977 | { | |
19978 | struct objfile *objfile; | |
19979 | struct obstack *addr_obstack; | |
19980 | htab_t cu_index_htab; | |
19981 | ||
19982 | /* Non-zero if the previous_* fields are valid. | |
19983 | We can't write an entry until we see the next entry (since it is only then | |
19984 | that we know the end of the entry). */ | |
19985 | int previous_valid; | |
19986 | /* Index of the CU in the table of all CUs in the index file. */ | |
19987 | unsigned int previous_cu_index; | |
0963b4bd | 19988 | /* Start address of the CU. */ |
0a5429f6 DE |
19989 | CORE_ADDR previous_cu_start; |
19990 | }; | |
19991 | ||
19992 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 19993 | |
9291a0cd | 19994 | static void |
0a5429f6 DE |
19995 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
19996 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 19997 | { |
0a5429f6 | 19998 | offset_type cu_index_to_write; |
9291a0cd TT |
19999 | char addr[8]; |
20000 | CORE_ADDR baseaddr; | |
20001 | ||
20002 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
20003 | ||
0a5429f6 DE |
20004 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
20005 | obstack_grow (obstack, addr, 8); | |
20006 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
20007 | obstack_grow (obstack, addr, 8); | |
20008 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
20009 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
20010 | } | |
20011 | ||
20012 | /* Worker function for traversing an addrmap to build the address table. */ | |
20013 | ||
20014 | static int | |
20015 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
20016 | { | |
20017 | struct addrmap_index_data *data = datap; | |
20018 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
20019 | |
20020 | if (data->previous_valid) | |
20021 | add_address_entry (data->objfile, data->addr_obstack, | |
20022 | data->previous_cu_start, start_addr, | |
20023 | data->previous_cu_index); | |
20024 | ||
20025 | data->previous_cu_start = start_addr; | |
20026 | if (pst != NULL) | |
20027 | { | |
20028 | struct psymtab_cu_index_map find_map, *map; | |
20029 | find_map.psymtab = pst; | |
20030 | map = htab_find (data->cu_index_htab, &find_map); | |
20031 | gdb_assert (map != NULL); | |
20032 | data->previous_cu_index = map->cu_index; | |
20033 | data->previous_valid = 1; | |
20034 | } | |
20035 | else | |
20036 | data->previous_valid = 0; | |
20037 | ||
20038 | return 0; | |
20039 | } | |
20040 | ||
20041 | /* Write OBJFILE's address map to OBSTACK. | |
20042 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
20043 | in the index file. */ | |
20044 | ||
20045 | static void | |
20046 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
20047 | htab_t cu_index_htab) | |
20048 | { | |
20049 | struct addrmap_index_data addrmap_index_data; | |
20050 | ||
20051 | /* When writing the address table, we have to cope with the fact that | |
20052 | the addrmap iterator only provides the start of a region; we have to | |
20053 | wait until the next invocation to get the start of the next region. */ | |
20054 | ||
20055 | addrmap_index_data.objfile = objfile; | |
20056 | addrmap_index_data.addr_obstack = obstack; | |
20057 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
20058 | addrmap_index_data.previous_valid = 0; | |
20059 | ||
20060 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
20061 | &addrmap_index_data); | |
20062 | ||
20063 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
20064 | is valid, but we should still handle it. | |
20065 | The end address is recorded as the start of the next region, but that | |
20066 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
20067 | anyway. */ | |
20068 | if (addrmap_index_data.previous_valid) | |
20069 | add_address_entry (objfile, obstack, | |
20070 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
20071 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
20072 | } |
20073 | ||
156942c7 DE |
20074 | /* Return the symbol kind of PSYM. */ |
20075 | ||
20076 | static gdb_index_symbol_kind | |
20077 | symbol_kind (struct partial_symbol *psym) | |
20078 | { | |
20079 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
20080 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
20081 | ||
20082 | switch (domain) | |
20083 | { | |
20084 | case VAR_DOMAIN: | |
20085 | switch (aclass) | |
20086 | { | |
20087 | case LOC_BLOCK: | |
20088 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
20089 | case LOC_TYPEDEF: | |
20090 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20091 | case LOC_COMPUTED: | |
20092 | case LOC_CONST_BYTES: | |
20093 | case LOC_OPTIMIZED_OUT: | |
20094 | case LOC_STATIC: | |
20095 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20096 | case LOC_CONST: | |
20097 | /* Note: It's currently impossible to recognize psyms as enum values | |
20098 | short of reading the type info. For now punt. */ | |
20099 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20100 | default: | |
20101 | /* There are other LOC_FOO values that one might want to classify | |
20102 | as variables, but dwarf2read.c doesn't currently use them. */ | |
20103 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20104 | } | |
20105 | case STRUCT_DOMAIN: | |
20106 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20107 | default: | |
20108 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20109 | } | |
20110 | } | |
20111 | ||
9291a0cd | 20112 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 20113 | |
9291a0cd TT |
20114 | static void |
20115 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 20116 | htab_t psyms_seen, |
9291a0cd TT |
20117 | struct partial_symbol **psymp, |
20118 | int count, | |
987d643c TT |
20119 | offset_type cu_index, |
20120 | int is_static) | |
9291a0cd TT |
20121 | { |
20122 | for (; count-- > 0; ++psymp) | |
20123 | { | |
156942c7 DE |
20124 | struct partial_symbol *psym = *psymp; |
20125 | void **slot; | |
987d643c | 20126 | |
156942c7 | 20127 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 20128 | error (_("Ada is not currently supported by the index")); |
987d643c | 20129 | |
987d643c | 20130 | /* Only add a given psymbol once. */ |
156942c7 | 20131 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
20132 | if (!*slot) |
20133 | { | |
156942c7 DE |
20134 | gdb_index_symbol_kind kind = symbol_kind (psym); |
20135 | ||
20136 | *slot = psym; | |
20137 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
20138 | is_static, kind, cu_index); | |
987d643c | 20139 | } |
9291a0cd TT |
20140 | } |
20141 | } | |
20142 | ||
20143 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
20144 | exception if there is an error. */ | |
b89be57b | 20145 | |
9291a0cd TT |
20146 | static void |
20147 | write_obstack (FILE *file, struct obstack *obstack) | |
20148 | { | |
20149 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
20150 | file) | |
20151 | != obstack_object_size (obstack)) | |
20152 | error (_("couldn't data write to file")); | |
20153 | } | |
20154 | ||
20155 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 20156 | |
9291a0cd TT |
20157 | static void |
20158 | unlink_if_set (void *p) | |
20159 | { | |
20160 | char **filename = p; | |
20161 | if (*filename) | |
20162 | unlink (*filename); | |
20163 | } | |
20164 | ||
1fd400ff TT |
20165 | /* A helper struct used when iterating over debug_types. */ |
20166 | struct signatured_type_index_data | |
20167 | { | |
20168 | struct objfile *objfile; | |
20169 | struct mapped_symtab *symtab; | |
20170 | struct obstack *types_list; | |
987d643c | 20171 | htab_t psyms_seen; |
1fd400ff TT |
20172 | int cu_index; |
20173 | }; | |
20174 | ||
20175 | /* A helper function that writes a single signatured_type to an | |
20176 | obstack. */ | |
b89be57b | 20177 | |
1fd400ff TT |
20178 | static int |
20179 | write_one_signatured_type (void **slot, void *d) | |
20180 | { | |
20181 | struct signatured_type_index_data *info = d; | |
20182 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
e254ef6a DE |
20183 | struct dwarf2_per_cu_data *per_cu = &entry->per_cu; |
20184 | struct partial_symtab *psymtab = per_cu->v.psymtab; | |
1fd400ff TT |
20185 | gdb_byte val[8]; |
20186 | ||
20187 | write_psymbols (info->symtab, | |
987d643c | 20188 | info->psyms_seen, |
3e43a32a MS |
20189 | info->objfile->global_psymbols.list |
20190 | + psymtab->globals_offset, | |
987d643c TT |
20191 | psymtab->n_global_syms, info->cu_index, |
20192 | 0); | |
1fd400ff | 20193 | write_psymbols (info->symtab, |
987d643c | 20194 | info->psyms_seen, |
3e43a32a MS |
20195 | info->objfile->static_psymbols.list |
20196 | + psymtab->statics_offset, | |
987d643c TT |
20197 | psymtab->n_static_syms, info->cu_index, |
20198 | 1); | |
1fd400ff | 20199 | |
b64f50a1 JK |
20200 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20201 | entry->per_cu.offset.sect_off); | |
1fd400ff | 20202 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
20203 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20204 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
20205 | obstack_grow (info->types_list, val, 8); |
20206 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
20207 | obstack_grow (info->types_list, val, 8); | |
20208 | ||
20209 | ++info->cu_index; | |
20210 | ||
20211 | return 1; | |
20212 | } | |
20213 | ||
95554aad TT |
20214 | /* Recurse into all "included" dependencies and write their symbols as |
20215 | if they appeared in this psymtab. */ | |
20216 | ||
20217 | static void | |
20218 | recursively_write_psymbols (struct objfile *objfile, | |
20219 | struct partial_symtab *psymtab, | |
20220 | struct mapped_symtab *symtab, | |
20221 | htab_t psyms_seen, | |
20222 | offset_type cu_index) | |
20223 | { | |
20224 | int i; | |
20225 | ||
20226 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
20227 | if (psymtab->dependencies[i]->user != NULL) | |
20228 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
20229 | symtab, psyms_seen, cu_index); | |
20230 | ||
20231 | write_psymbols (symtab, | |
20232 | psyms_seen, | |
20233 | objfile->global_psymbols.list + psymtab->globals_offset, | |
20234 | psymtab->n_global_syms, cu_index, | |
20235 | 0); | |
20236 | write_psymbols (symtab, | |
20237 | psyms_seen, | |
20238 | objfile->static_psymbols.list + psymtab->statics_offset, | |
20239 | psymtab->n_static_syms, cu_index, | |
20240 | 1); | |
20241 | } | |
20242 | ||
9291a0cd | 20243 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 20244 | |
9291a0cd TT |
20245 | static void |
20246 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
20247 | { | |
20248 | struct cleanup *cleanup; | |
20249 | char *filename, *cleanup_filename; | |
1fd400ff TT |
20250 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
20251 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
20252 | int i; |
20253 | FILE *out_file; | |
20254 | struct mapped_symtab *symtab; | |
20255 | offset_type val, size_of_contents, total_len; | |
20256 | struct stat st; | |
987d643c | 20257 | htab_t psyms_seen; |
0a5429f6 DE |
20258 | htab_t cu_index_htab; |
20259 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 20260 | |
b4f2f049 | 20261 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
9291a0cd | 20262 | return; |
b4f2f049 | 20263 | |
9291a0cd TT |
20264 | if (dwarf2_per_objfile->using_index) |
20265 | error (_("Cannot use an index to create the index")); | |
20266 | ||
8b70b953 TT |
20267 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
20268 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
20269 | ||
9291a0cd | 20270 | if (stat (objfile->name, &st) < 0) |
7e17e088 | 20271 | perror_with_name (objfile->name); |
9291a0cd TT |
20272 | |
20273 | filename = concat (dir, SLASH_STRING, lbasename (objfile->name), | |
20274 | INDEX_SUFFIX, (char *) NULL); | |
20275 | cleanup = make_cleanup (xfree, filename); | |
20276 | ||
20277 | out_file = fopen (filename, "wb"); | |
20278 | if (!out_file) | |
20279 | error (_("Can't open `%s' for writing"), filename); | |
20280 | ||
20281 | cleanup_filename = filename; | |
20282 | make_cleanup (unlink_if_set, &cleanup_filename); | |
20283 | ||
20284 | symtab = create_mapped_symtab (); | |
20285 | make_cleanup (cleanup_mapped_symtab, symtab); | |
20286 | ||
20287 | obstack_init (&addr_obstack); | |
20288 | make_cleanup_obstack_free (&addr_obstack); | |
20289 | ||
20290 | obstack_init (&cu_list); | |
20291 | make_cleanup_obstack_free (&cu_list); | |
20292 | ||
1fd400ff TT |
20293 | obstack_init (&types_cu_list); |
20294 | make_cleanup_obstack_free (&types_cu_list); | |
20295 | ||
987d643c TT |
20296 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
20297 | NULL, xcalloc, xfree); | |
96408a79 | 20298 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 20299 | |
0a5429f6 DE |
20300 | /* While we're scanning CU's create a table that maps a psymtab pointer |
20301 | (which is what addrmap records) to its index (which is what is recorded | |
20302 | in the index file). This will later be needed to write the address | |
20303 | table. */ | |
20304 | cu_index_htab = htab_create_alloc (100, | |
20305 | hash_psymtab_cu_index, | |
20306 | eq_psymtab_cu_index, | |
20307 | NULL, xcalloc, xfree); | |
96408a79 | 20308 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
20309 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
20310 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
20311 | * dwarf2_per_objfile->n_comp_units); | |
20312 | make_cleanup (xfree, psymtab_cu_index_map); | |
20313 | ||
20314 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
20315 | work here. Also, the debug_types entries do not appear in |
20316 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
20317 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
20318 | { | |
3e43a32a MS |
20319 | struct dwarf2_per_cu_data *per_cu |
20320 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 20321 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 20322 | gdb_byte val[8]; |
0a5429f6 DE |
20323 | struct psymtab_cu_index_map *map; |
20324 | void **slot; | |
9291a0cd | 20325 | |
95554aad TT |
20326 | if (psymtab->user == NULL) |
20327 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 20328 | |
0a5429f6 DE |
20329 | map = &psymtab_cu_index_map[i]; |
20330 | map->psymtab = psymtab; | |
20331 | map->cu_index = i; | |
20332 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
20333 | gdb_assert (slot != NULL); | |
20334 | gdb_assert (*slot == NULL); | |
20335 | *slot = map; | |
9291a0cd | 20336 | |
b64f50a1 JK |
20337 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20338 | per_cu->offset.sect_off); | |
9291a0cd | 20339 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 20340 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
20341 | obstack_grow (&cu_list, val, 8); |
20342 | } | |
20343 | ||
0a5429f6 DE |
20344 | /* Dump the address map. */ |
20345 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
20346 | ||
1fd400ff TT |
20347 | /* Write out the .debug_type entries, if any. */ |
20348 | if (dwarf2_per_objfile->signatured_types) | |
20349 | { | |
20350 | struct signatured_type_index_data sig_data; | |
20351 | ||
20352 | sig_data.objfile = objfile; | |
20353 | sig_data.symtab = symtab; | |
20354 | sig_data.types_list = &types_cu_list; | |
987d643c | 20355 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
20356 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
20357 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
20358 | write_one_signatured_type, &sig_data); | |
20359 | } | |
20360 | ||
156942c7 DE |
20361 | /* Now that we've processed all symbols we can shrink their cu_indices |
20362 | lists. */ | |
20363 | uniquify_cu_indices (symtab); | |
20364 | ||
9291a0cd TT |
20365 | obstack_init (&constant_pool); |
20366 | make_cleanup_obstack_free (&constant_pool); | |
20367 | obstack_init (&symtab_obstack); | |
20368 | make_cleanup_obstack_free (&symtab_obstack); | |
20369 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
20370 | ||
20371 | obstack_init (&contents); | |
20372 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 20373 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
20374 | total_len = size_of_contents; |
20375 | ||
20376 | /* The version number. */ | |
156942c7 | 20377 | val = MAYBE_SWAP (7); |
9291a0cd TT |
20378 | obstack_grow (&contents, &val, sizeof (val)); |
20379 | ||
20380 | /* The offset of the CU list from the start of the file. */ | |
20381 | val = MAYBE_SWAP (total_len); | |
20382 | obstack_grow (&contents, &val, sizeof (val)); | |
20383 | total_len += obstack_object_size (&cu_list); | |
20384 | ||
1fd400ff TT |
20385 | /* The offset of the types CU list from the start of the file. */ |
20386 | val = MAYBE_SWAP (total_len); | |
20387 | obstack_grow (&contents, &val, sizeof (val)); | |
20388 | total_len += obstack_object_size (&types_cu_list); | |
20389 | ||
9291a0cd TT |
20390 | /* The offset of the address table from the start of the file. */ |
20391 | val = MAYBE_SWAP (total_len); | |
20392 | obstack_grow (&contents, &val, sizeof (val)); | |
20393 | total_len += obstack_object_size (&addr_obstack); | |
20394 | ||
20395 | /* The offset of the symbol table from the start of the file. */ | |
20396 | val = MAYBE_SWAP (total_len); | |
20397 | obstack_grow (&contents, &val, sizeof (val)); | |
20398 | total_len += obstack_object_size (&symtab_obstack); | |
20399 | ||
20400 | /* The offset of the constant pool from the start of the file. */ | |
20401 | val = MAYBE_SWAP (total_len); | |
20402 | obstack_grow (&contents, &val, sizeof (val)); | |
20403 | total_len += obstack_object_size (&constant_pool); | |
20404 | ||
20405 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
20406 | ||
20407 | write_obstack (out_file, &contents); | |
20408 | write_obstack (out_file, &cu_list); | |
1fd400ff | 20409 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
20410 | write_obstack (out_file, &addr_obstack); |
20411 | write_obstack (out_file, &symtab_obstack); | |
20412 | write_obstack (out_file, &constant_pool); | |
20413 | ||
20414 | fclose (out_file); | |
20415 | ||
20416 | /* We want to keep the file, so we set cleanup_filename to NULL | |
20417 | here. See unlink_if_set. */ | |
20418 | cleanup_filename = NULL; | |
20419 | ||
20420 | do_cleanups (cleanup); | |
20421 | } | |
20422 | ||
90476074 TT |
20423 | /* Implementation of the `save gdb-index' command. |
20424 | ||
20425 | Note that the file format used by this command is documented in the | |
20426 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 20427 | |
9291a0cd TT |
20428 | static void |
20429 | save_gdb_index_command (char *arg, int from_tty) | |
20430 | { | |
20431 | struct objfile *objfile; | |
20432 | ||
20433 | if (!arg || !*arg) | |
96d19272 | 20434 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
20435 | |
20436 | ALL_OBJFILES (objfile) | |
20437 | { | |
20438 | struct stat st; | |
20439 | ||
20440 | /* If the objfile does not correspond to an actual file, skip it. */ | |
20441 | if (stat (objfile->name, &st) < 0) | |
20442 | continue; | |
20443 | ||
20444 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
20445 | if (dwarf2_per_objfile) | |
20446 | { | |
20447 | volatile struct gdb_exception except; | |
20448 | ||
20449 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
20450 | { | |
20451 | write_psymtabs_to_index (objfile, arg); | |
20452 | } | |
20453 | if (except.reason < 0) | |
20454 | exception_fprintf (gdb_stderr, except, | |
20455 | _("Error while writing index for `%s': "), | |
20456 | objfile->name); | |
20457 | } | |
20458 | } | |
dce234bc PP |
20459 | } |
20460 | ||
9291a0cd TT |
20461 | \f |
20462 | ||
9eae7c52 TT |
20463 | int dwarf2_always_disassemble; |
20464 | ||
20465 | static void | |
20466 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
20467 | struct cmd_list_element *c, const char *value) | |
20468 | { | |
3e43a32a MS |
20469 | fprintf_filtered (file, |
20470 | _("Whether to always disassemble " | |
20471 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
20472 | value); |
20473 | } | |
20474 | ||
900e11f9 JK |
20475 | static void |
20476 | show_check_physname (struct ui_file *file, int from_tty, | |
20477 | struct cmd_list_element *c, const char *value) | |
20478 | { | |
20479 | fprintf_filtered (file, | |
20480 | _("Whether to check \"physname\" is %s.\n"), | |
20481 | value); | |
20482 | } | |
20483 | ||
6502dd73 DJ |
20484 | void _initialize_dwarf2_read (void); |
20485 | ||
20486 | void | |
20487 | _initialize_dwarf2_read (void) | |
20488 | { | |
96d19272 JK |
20489 | struct cmd_list_element *c; |
20490 | ||
dce234bc | 20491 | dwarf2_objfile_data_key |
c1bd65d0 | 20492 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 20493 | |
1bedd215 AC |
20494 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
20495 | Set DWARF 2 specific variables.\n\ | |
20496 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20497 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
20498 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
20499 | ||
1bedd215 AC |
20500 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
20501 | Show DWARF 2 specific variables\n\ | |
20502 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20503 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
20504 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
20505 | ||
20506 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
20507 | &dwarf2_max_cache_age, _("\ |
20508 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20509 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20510 | A higher limit means that cached compilation units will be stored\n\ | |
20511 | in memory longer, and more total memory will be used. Zero disables\n\ | |
20512 | caching, which can slow down startup."), | |
2c5b56ce | 20513 | NULL, |
920d2a44 | 20514 | show_dwarf2_max_cache_age, |
2c5b56ce | 20515 | &set_dwarf2_cmdlist, |
ae038cb0 | 20516 | &show_dwarf2_cmdlist); |
d97bc12b | 20517 | |
9eae7c52 TT |
20518 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
20519 | &dwarf2_always_disassemble, _("\ | |
20520 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
20521 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
20522 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
20523 | syntax. When disabled, expressions will be printed in a more\n\ | |
20524 | conversational style, when possible."), | |
20525 | NULL, | |
20526 | show_dwarf2_always_disassemble, | |
20527 | &set_dwarf2_cmdlist, | |
20528 | &show_dwarf2_cmdlist); | |
20529 | ||
45cfd468 DE |
20530 | add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
20531 | Set debugging of the dwarf2 reader."), _("\ | |
20532 | Show debugging of the dwarf2 reader."), _("\ | |
20533 | When enabled, debugging messages are printed during dwarf2 reading\n\ | |
20534 | and symtab expansion."), | |
20535 | NULL, | |
20536 | NULL, | |
20537 | &setdebuglist, &showdebuglist); | |
20538 | ||
ccce17b0 | 20539 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
20540 | Set debugging of the dwarf2 DIE reader."), _("\ |
20541 | Show debugging of the dwarf2 DIE reader."), _("\ | |
20542 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
20543 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
20544 | NULL, |
20545 | NULL, | |
20546 | &setdebuglist, &showdebuglist); | |
9291a0cd | 20547 | |
900e11f9 JK |
20548 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
20549 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
20550 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
20551 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
20552 | the demangler."), | |
20553 | NULL, show_check_physname, | |
20554 | &setdebuglist, &showdebuglist); | |
20555 | ||
e615022a DE |
20556 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
20557 | no_class, &use_deprecated_index_sections, _("\ | |
20558 | Set whether to use deprecated gdb_index sections."), _("\ | |
20559 | Show whether to use deprecated gdb_index sections."), _("\ | |
20560 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
20561 | Normally they are ignored either because of a missing feature or\n\ | |
20562 | performance issue.\n\ | |
20563 | Warning: This option must be enabled before gdb reads the file."), | |
20564 | NULL, | |
20565 | NULL, | |
20566 | &setlist, &showlist); | |
20567 | ||
96d19272 | 20568 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 20569 | _("\ |
fc1a9d6e | 20570 | Save a gdb-index file.\n\ |
11570e71 | 20571 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
20572 | &save_cmdlist); |
20573 | set_cmd_completer (c, filename_completer); | |
6502dd73 | 20574 | } |