Commit | Line | Data |
---|---|---|
c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
28e7fd62 | 3 | Copyright (C) 1994-2013 Free Software Foundation, Inc. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c SS |
31 | #include "defs.h" |
32 | #include "bfd.h" | |
80626a55 | 33 | #include "elf-bfd.h" |
c906108c SS |
34 | #include "symtab.h" |
35 | #include "gdbtypes.h" | |
c906108c | 36 | #include "objfiles.h" |
fa8f86ff | 37 | #include "dwarf2.h" |
c906108c SS |
38 | #include "buildsym.h" |
39 | #include "demangle.h" | |
50f182aa | 40 | #include "gdb-demangle.h" |
c906108c | 41 | #include "expression.h" |
d5166ae1 | 42 | #include "filenames.h" /* for DOSish file names */ |
2e276125 | 43 | #include "macrotab.h" |
c906108c SS |
44 | #include "language.h" |
45 | #include "complaints.h" | |
357e46e7 | 46 | #include "bcache.h" |
4c2df51b DJ |
47 | #include "dwarf2expr.h" |
48 | #include "dwarf2loc.h" | |
9219021c | 49 | #include "cp-support.h" |
72bf9492 | 50 | #include "hashtab.h" |
ae038cb0 DJ |
51 | #include "command.h" |
52 | #include "gdbcmd.h" | |
edb3359d | 53 | #include "block.h" |
ff013f42 | 54 | #include "addrmap.h" |
94af9270 KS |
55 | #include "typeprint.h" |
56 | #include "jv-lang.h" | |
ccefe4c4 | 57 | #include "psympriv.h" |
9291a0cd TT |
58 | #include "exceptions.h" |
59 | #include "gdb_stat.h" | |
96d19272 | 60 | #include "completer.h" |
34eaf542 | 61 | #include "vec.h" |
98bfdba5 | 62 | #include "c-lang.h" |
a766d390 | 63 | #include "go-lang.h" |
98bfdba5 | 64 | #include "valprint.h" |
3019eac3 | 65 | #include "gdbcore.h" /* for gnutarget */ |
156942c7 | 66 | #include "gdb/gdb-index.h" |
60d5a603 | 67 | #include <ctype.h> |
cbb099e8 | 68 | #include "gdb_bfd.h" |
4357ac6c | 69 | #include "f-lang.h" |
05cba821 | 70 | #include "source.h" |
614c279d | 71 | #include "filestuff.h" |
4c2df51b | 72 | |
c906108c SS |
73 | #include <fcntl.h> |
74 | #include "gdb_string.h" | |
4bdf3d34 | 75 | #include "gdb_assert.h" |
c906108c | 76 | #include <sys/types.h> |
d8151005 | 77 | |
34eaf542 TT |
78 | typedef struct symbol *symbolp; |
79 | DEF_VEC_P (symbolp); | |
80 | ||
45cfd468 DE |
81 | /* When non-zero, print basic high level tracing messages. |
82 | This is in contrast to the low level DIE reading of dwarf2_die_debug. */ | |
83 | static int dwarf2_read_debug = 0; | |
84 | ||
d97bc12b | 85 | /* When non-zero, dump DIEs after they are read in. */ |
ccce17b0 | 86 | static unsigned int dwarf2_die_debug = 0; |
d97bc12b | 87 | |
900e11f9 JK |
88 | /* When non-zero, cross-check physname against demangler. */ |
89 | static int check_physname = 0; | |
90 | ||
481860b3 | 91 | /* When non-zero, do not reject deprecated .gdb_index sections. */ |
e615022a | 92 | static int use_deprecated_index_sections = 0; |
481860b3 | 93 | |
6502dd73 DJ |
94 | static const struct objfile_data *dwarf2_objfile_data_key; |
95 | ||
f1e6e072 TT |
96 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
97 | ||
98 | static int dwarf2_locexpr_index; | |
99 | static int dwarf2_loclist_index; | |
100 | static int dwarf2_locexpr_block_index; | |
101 | static int dwarf2_loclist_block_index; | |
102 | ||
dce234bc PP |
103 | struct dwarf2_section_info |
104 | { | |
105 | asection *asection; | |
d521ce57 | 106 | const gdb_byte *buffer; |
dce234bc | 107 | bfd_size_type size; |
be391dca TT |
108 | /* True if we have tried to read this section. */ |
109 | int readin; | |
dce234bc PP |
110 | }; |
111 | ||
8b70b953 TT |
112 | typedef struct dwarf2_section_info dwarf2_section_info_def; |
113 | DEF_VEC_O (dwarf2_section_info_def); | |
114 | ||
9291a0cd TT |
115 | /* All offsets in the index are of this type. It must be |
116 | architecture-independent. */ | |
117 | typedef uint32_t offset_type; | |
118 | ||
119 | DEF_VEC_I (offset_type); | |
120 | ||
156942c7 DE |
121 | /* Ensure only legit values are used. */ |
122 | #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \ | |
123 | do { \ | |
124 | gdb_assert ((unsigned int) (value) <= 1); \ | |
125 | GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \ | |
126 | } while (0) | |
127 | ||
128 | /* Ensure only legit values are used. */ | |
129 | #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \ | |
130 | do { \ | |
131 | gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \ | |
132 | && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \ | |
133 | GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \ | |
134 | } while (0) | |
135 | ||
136 | /* Ensure we don't use more than the alloted nuber of bits for the CU. */ | |
137 | #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \ | |
138 | do { \ | |
139 | gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \ | |
140 | GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \ | |
141 | } while (0) | |
142 | ||
9291a0cd TT |
143 | /* A description of the mapped index. The file format is described in |
144 | a comment by the code that writes the index. */ | |
145 | struct mapped_index | |
146 | { | |
559a7a62 JK |
147 | /* Index data format version. */ |
148 | int version; | |
149 | ||
9291a0cd TT |
150 | /* The total length of the buffer. */ |
151 | off_t total_size; | |
b11b1f88 | 152 | |
9291a0cd TT |
153 | /* A pointer to the address table data. */ |
154 | const gdb_byte *address_table; | |
b11b1f88 | 155 | |
9291a0cd TT |
156 | /* Size of the address table data in bytes. */ |
157 | offset_type address_table_size; | |
b11b1f88 | 158 | |
3876f04e DE |
159 | /* The symbol table, implemented as a hash table. */ |
160 | const offset_type *symbol_table; | |
b11b1f88 | 161 | |
9291a0cd | 162 | /* Size in slots, each slot is 2 offset_types. */ |
3876f04e | 163 | offset_type symbol_table_slots; |
b11b1f88 | 164 | |
9291a0cd TT |
165 | /* A pointer to the constant pool. */ |
166 | const char *constant_pool; | |
167 | }; | |
168 | ||
95554aad TT |
169 | typedef struct dwarf2_per_cu_data *dwarf2_per_cu_ptr; |
170 | DEF_VEC_P (dwarf2_per_cu_ptr); | |
171 | ||
9cdd5dbd DE |
172 | /* Collection of data recorded per objfile. |
173 | This hangs off of dwarf2_objfile_data_key. */ | |
174 | ||
6502dd73 DJ |
175 | struct dwarf2_per_objfile |
176 | { | |
dce234bc PP |
177 | struct dwarf2_section_info info; |
178 | struct dwarf2_section_info abbrev; | |
179 | struct dwarf2_section_info line; | |
dce234bc PP |
180 | struct dwarf2_section_info loc; |
181 | struct dwarf2_section_info macinfo; | |
cf2c3c16 | 182 | struct dwarf2_section_info macro; |
dce234bc PP |
183 | struct dwarf2_section_info str; |
184 | struct dwarf2_section_info ranges; | |
3019eac3 | 185 | struct dwarf2_section_info addr; |
dce234bc PP |
186 | struct dwarf2_section_info frame; |
187 | struct dwarf2_section_info eh_frame; | |
9291a0cd | 188 | struct dwarf2_section_info gdb_index; |
ae038cb0 | 189 | |
8b70b953 TT |
190 | VEC (dwarf2_section_info_def) *types; |
191 | ||
be391dca TT |
192 | /* Back link. */ |
193 | struct objfile *objfile; | |
194 | ||
d467dd73 | 195 | /* Table of all the compilation units. This is used to locate |
10b3939b | 196 | the target compilation unit of a particular reference. */ |
ae038cb0 DJ |
197 | struct dwarf2_per_cu_data **all_comp_units; |
198 | ||
199 | /* The number of compilation units in ALL_COMP_UNITS. */ | |
200 | int n_comp_units; | |
201 | ||
1fd400ff | 202 | /* The number of .debug_types-related CUs. */ |
d467dd73 | 203 | int n_type_units; |
1fd400ff | 204 | |
d467dd73 | 205 | /* The .debug_types-related CUs (TUs). */ |
b4dd5633 | 206 | struct signatured_type **all_type_units; |
1fd400ff | 207 | |
f4dc4d17 DE |
208 | /* The number of entries in all_type_unit_groups. */ |
209 | int n_type_unit_groups; | |
210 | ||
211 | /* Table of type unit groups. | |
212 | This exists to make it easy to iterate over all CUs and TU groups. */ | |
213 | struct type_unit_group **all_type_unit_groups; | |
214 | ||
215 | /* Table of struct type_unit_group objects. | |
216 | The hash key is the DW_AT_stmt_list value. */ | |
217 | htab_t type_unit_groups; | |
72dca2f5 | 218 | |
348e048f DE |
219 | /* A table mapping .debug_types signatures to its signatured_type entry. |
220 | This is NULL if the .debug_types section hasn't been read in yet. */ | |
221 | htab_t signatured_types; | |
222 | ||
f4dc4d17 DE |
223 | /* Type unit statistics, to see how well the scaling improvements |
224 | are doing. */ | |
225 | struct tu_stats | |
226 | { | |
227 | int nr_uniq_abbrev_tables; | |
228 | int nr_symtabs; | |
229 | int nr_symtab_sharers; | |
230 | int nr_stmt_less_type_units; | |
231 | } tu_stats; | |
232 | ||
233 | /* A chain of compilation units that are currently read in, so that | |
234 | they can be freed later. */ | |
235 | struct dwarf2_per_cu_data *read_in_chain; | |
236 | ||
3019eac3 DE |
237 | /* A table mapping DW_AT_dwo_name values to struct dwo_file objects. |
238 | This is NULL if the table hasn't been allocated yet. */ | |
239 | htab_t dwo_files; | |
240 | ||
80626a55 DE |
241 | /* Non-zero if we've check for whether there is a DWP file. */ |
242 | int dwp_checked; | |
243 | ||
244 | /* The DWP file if there is one, or NULL. */ | |
245 | struct dwp_file *dwp_file; | |
246 | ||
36586728 TT |
247 | /* The shared '.dwz' file, if one exists. This is used when the |
248 | original data was compressed using 'dwz -m'. */ | |
249 | struct dwz_file *dwz_file; | |
250 | ||
72dca2f5 FR |
251 | /* A flag indicating wether this objfile has a section loaded at a |
252 | VMA of 0. */ | |
253 | int has_section_at_zero; | |
9291a0cd | 254 | |
ae2de4f8 DE |
255 | /* True if we are using the mapped index, |
256 | or we are faking it for OBJF_READNOW's sake. */ | |
9291a0cd TT |
257 | unsigned char using_index; |
258 | ||
ae2de4f8 | 259 | /* The mapped index, or NULL if .gdb_index is missing or not being used. */ |
9291a0cd | 260 | struct mapped_index *index_table; |
98bfdba5 | 261 | |
7b9f3c50 | 262 | /* When using index_table, this keeps track of all quick_file_names entries. |
56e64610 DE |
263 | TUs typically share line table entries with a CU, so we maintain a |
264 | separate table of all line table entries to support the sharing. | |
265 | Note that while there can be way more TUs than CUs, we've already | |
266 | sorted all the TUs into "type unit groups", grouped by their | |
267 | DW_AT_stmt_list value. Therefore the only sharing done here is with a | |
268 | CU and its associated TU group if there is one. */ | |
7b9f3c50 DE |
269 | htab_t quick_file_names_table; |
270 | ||
98bfdba5 PA |
271 | /* Set during partial symbol reading, to prevent queueing of full |
272 | symbols. */ | |
273 | int reading_partial_symbols; | |
673bfd45 | 274 | |
dee91e82 | 275 | /* Table mapping type DIEs to their struct type *. |
673bfd45 | 276 | This is NULL if not allocated yet. |
02142a6c | 277 | The mapping is done via (CU/TU + DIE offset) -> type. */ |
dee91e82 | 278 | htab_t die_type_hash; |
95554aad TT |
279 | |
280 | /* The CUs we recently read. */ | |
281 | VEC (dwarf2_per_cu_ptr) *just_read_cus; | |
6502dd73 DJ |
282 | }; |
283 | ||
284 | static struct dwarf2_per_objfile *dwarf2_per_objfile; | |
c906108c | 285 | |
251d32d9 | 286 | /* Default names of the debugging sections. */ |
c906108c | 287 | |
233a11ab CS |
288 | /* Note that if the debugging section has been compressed, it might |
289 | have a name like .zdebug_info. */ | |
290 | ||
9cdd5dbd DE |
291 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
292 | { | |
251d32d9 TG |
293 | { ".debug_info", ".zdebug_info" }, |
294 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
295 | { ".debug_line", ".zdebug_line" }, | |
296 | { ".debug_loc", ".zdebug_loc" }, | |
297 | { ".debug_macinfo", ".zdebug_macinfo" }, | |
cf2c3c16 | 298 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 TG |
299 | { ".debug_str", ".zdebug_str" }, |
300 | { ".debug_ranges", ".zdebug_ranges" }, | |
301 | { ".debug_types", ".zdebug_types" }, | |
3019eac3 | 302 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
303 | { ".debug_frame", ".zdebug_frame" }, |
304 | { ".eh_frame", NULL }, | |
24d3216f TT |
305 | { ".gdb_index", ".zgdb_index" }, |
306 | 23 | |
251d32d9 | 307 | }; |
c906108c | 308 | |
80626a55 | 309 | /* List of DWO/DWP sections. */ |
3019eac3 | 310 | |
80626a55 | 311 | static const struct dwop_section_names |
3019eac3 DE |
312 | { |
313 | struct dwarf2_section_names abbrev_dwo; | |
314 | struct dwarf2_section_names info_dwo; | |
315 | struct dwarf2_section_names line_dwo; | |
316 | struct dwarf2_section_names loc_dwo; | |
09262596 DE |
317 | struct dwarf2_section_names macinfo_dwo; |
318 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
319 | struct dwarf2_section_names str_dwo; |
320 | struct dwarf2_section_names str_offsets_dwo; | |
321 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
322 | struct dwarf2_section_names cu_index; |
323 | struct dwarf2_section_names tu_index; | |
3019eac3 | 324 | } |
80626a55 | 325 | dwop_section_names = |
3019eac3 DE |
326 | { |
327 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
328 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
329 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
330 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
09262596 DE |
331 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
332 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
333 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
334 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
335 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
336 | { ".debug_cu_index", ".zdebug_cu_index" }, |
337 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
338 | }; |
339 | ||
c906108c SS |
340 | /* local data types */ |
341 | ||
107d2387 AC |
342 | /* The data in a compilation unit header, after target2host |
343 | translation, looks like this. */ | |
c906108c | 344 | struct comp_unit_head |
a738430d | 345 | { |
c764a876 | 346 | unsigned int length; |
a738430d | 347 | short version; |
a738430d MK |
348 | unsigned char addr_size; |
349 | unsigned char signed_addr_p; | |
b64f50a1 | 350 | sect_offset abbrev_offset; |
57349743 | 351 | |
a738430d MK |
352 | /* Size of file offsets; either 4 or 8. */ |
353 | unsigned int offset_size; | |
57349743 | 354 | |
a738430d MK |
355 | /* Size of the length field; either 4 or 12. */ |
356 | unsigned int initial_length_size; | |
57349743 | 357 | |
a738430d MK |
358 | /* Offset to the first byte of this compilation unit header in the |
359 | .debug_info section, for resolving relative reference dies. */ | |
b64f50a1 | 360 | sect_offset offset; |
57349743 | 361 | |
d00adf39 DE |
362 | /* Offset to first die in this cu from the start of the cu. |
363 | This will be the first byte following the compilation unit header. */ | |
b64f50a1 | 364 | cu_offset first_die_offset; |
a738430d | 365 | }; |
c906108c | 366 | |
3da10d80 KS |
367 | /* Type used for delaying computation of method physnames. |
368 | See comments for compute_delayed_physnames. */ | |
369 | struct delayed_method_info | |
370 | { | |
371 | /* The type to which the method is attached, i.e., its parent class. */ | |
372 | struct type *type; | |
373 | ||
374 | /* The index of the method in the type's function fieldlists. */ | |
375 | int fnfield_index; | |
376 | ||
377 | /* The index of the method in the fieldlist. */ | |
378 | int index; | |
379 | ||
380 | /* The name of the DIE. */ | |
381 | const char *name; | |
382 | ||
383 | /* The DIE associated with this method. */ | |
384 | struct die_info *die; | |
385 | }; | |
386 | ||
387 | typedef struct delayed_method_info delayed_method_info; | |
388 | DEF_VEC_O (delayed_method_info); | |
389 | ||
e7c27a73 DJ |
390 | /* Internal state when decoding a particular compilation unit. */ |
391 | struct dwarf2_cu | |
392 | { | |
393 | /* The objfile containing this compilation unit. */ | |
394 | struct objfile *objfile; | |
395 | ||
d00adf39 | 396 | /* The header of the compilation unit. */ |
e7c27a73 | 397 | struct comp_unit_head header; |
e142c38c | 398 | |
d00adf39 DE |
399 | /* Base address of this compilation unit. */ |
400 | CORE_ADDR base_address; | |
401 | ||
402 | /* Non-zero if base_address has been set. */ | |
403 | int base_known; | |
404 | ||
e142c38c DJ |
405 | /* The language we are debugging. */ |
406 | enum language language; | |
407 | const struct language_defn *language_defn; | |
408 | ||
b0f35d58 DL |
409 | const char *producer; |
410 | ||
e142c38c DJ |
411 | /* The generic symbol table building routines have separate lists for |
412 | file scope symbols and all all other scopes (local scopes). So | |
413 | we need to select the right one to pass to add_symbol_to_list(). | |
414 | We do it by keeping a pointer to the correct list in list_in_scope. | |
415 | ||
416 | FIXME: The original dwarf code just treated the file scope as the | |
417 | first local scope, and all other local scopes as nested local | |
418 | scopes, and worked fine. Check to see if we really need to | |
419 | distinguish these in buildsym.c. */ | |
420 | struct pending **list_in_scope; | |
421 | ||
433df2d4 DE |
422 | /* The abbrev table for this CU. |
423 | Normally this points to the abbrev table in the objfile. | |
424 | But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */ | |
425 | struct abbrev_table *abbrev_table; | |
72bf9492 | 426 | |
b64f50a1 JK |
427 | /* Hash table holding all the loaded partial DIEs |
428 | with partial_die->offset.SECT_OFF as hash. */ | |
72bf9492 DJ |
429 | htab_t partial_dies; |
430 | ||
431 | /* Storage for things with the same lifetime as this read-in compilation | |
432 | unit, including partial DIEs. */ | |
433 | struct obstack comp_unit_obstack; | |
434 | ||
ae038cb0 DJ |
435 | /* When multiple dwarf2_cu structures are living in memory, this field |
436 | chains them all together, so that they can be released efficiently. | |
437 | We will probably also want a generation counter so that most-recently-used | |
438 | compilation units are cached... */ | |
439 | struct dwarf2_per_cu_data *read_in_chain; | |
440 | ||
441 | /* Backchain to our per_cu entry if the tree has been built. */ | |
442 | struct dwarf2_per_cu_data *per_cu; | |
443 | ||
444 | /* How many compilation units ago was this CU last referenced? */ | |
445 | int last_used; | |
446 | ||
b64f50a1 JK |
447 | /* A hash table of DIE cu_offset for following references with |
448 | die_info->offset.sect_off as hash. */ | |
51545339 | 449 | htab_t die_hash; |
10b3939b DJ |
450 | |
451 | /* Full DIEs if read in. */ | |
452 | struct die_info *dies; | |
453 | ||
454 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
455 | units referenced by this one. Only set during full symbol processing; | |
456 | partial symbol tables do not have dependencies. */ | |
457 | htab_t dependencies; | |
458 | ||
cb1df416 DJ |
459 | /* Header data from the line table, during full symbol processing. */ |
460 | struct line_header *line_header; | |
461 | ||
3da10d80 KS |
462 | /* A list of methods which need to have physnames computed |
463 | after all type information has been read. */ | |
464 | VEC (delayed_method_info) *method_list; | |
465 | ||
96408a79 SA |
466 | /* To be copied to symtab->call_site_htab. */ |
467 | htab_t call_site_htab; | |
468 | ||
034e5797 DE |
469 | /* Non-NULL if this CU came from a DWO file. |
470 | There is an invariant here that is important to remember: | |
471 | Except for attributes copied from the top level DIE in the "main" | |
472 | (or "stub") file in preparation for reading the DWO file | |
473 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
474 | Either there isn't a DWO file (in which case this is NULL and the point | |
475 | is moot), or there is and either we're not going to read it (in which | |
476 | case this is NULL) or there is and we are reading it (in which case this | |
477 | is non-NULL). */ | |
3019eac3 DE |
478 | struct dwo_unit *dwo_unit; |
479 | ||
480 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
481 | (zero is a valid value though). | |
482 | Note this value comes from the stub CU/TU's DIE. */ | |
483 | ULONGEST addr_base; | |
484 | ||
2e3cf129 DE |
485 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
486 | (zero is a valid value though). | |
487 | Note this value comes from the stub CU/TU's DIE. | |
488 | Also note that the value is zero in the non-DWO case so this value can | |
ab435259 DE |
489 | be used without needing to know whether DWO files are in use or not. |
490 | N.B. This does not apply to DW_AT_ranges appearing in | |
491 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
492 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
493 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
494 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
2e3cf129 DE |
495 | ULONGEST ranges_base; |
496 | ||
ae038cb0 DJ |
497 | /* Mark used when releasing cached dies. */ |
498 | unsigned int mark : 1; | |
499 | ||
8be455d7 JK |
500 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
501 | This test is imperfect as there may exist optimized debug code not using | |
502 | any location list and still facing inlining issues if handled as | |
503 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
8be455d7 | 504 | unsigned int has_loclist : 1; |
ba919b58 | 505 | |
1b80a9fa JK |
506 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set |
507 | if all the producer_is_* fields are valid. This information is cached | |
508 | because profiling CU expansion showed excessive time spent in | |
509 | producer_is_gxx_lt_4_6. */ | |
ba919b58 TT |
510 | unsigned int checked_producer : 1; |
511 | unsigned int producer_is_gxx_lt_4_6 : 1; | |
1b80a9fa | 512 | unsigned int producer_is_gcc_lt_4_3 : 1; |
685b1105 | 513 | unsigned int producer_is_icc : 1; |
4d4ec4e5 TT |
514 | |
515 | /* When set, the file that we're processing is known to have | |
516 | debugging info for C++ namespaces. GCC 3.3.x did not produce | |
517 | this information, but later versions do. */ | |
518 | ||
519 | unsigned int processing_has_namespace_info : 1; | |
e7c27a73 DJ |
520 | }; |
521 | ||
10b3939b DJ |
522 | /* Persistent data held for a compilation unit, even when not |
523 | processing it. We put a pointer to this structure in the | |
28dee7f5 | 524 | read_symtab_private field of the psymtab. */ |
10b3939b | 525 | |
ae038cb0 DJ |
526 | struct dwarf2_per_cu_data |
527 | { | |
36586728 | 528 | /* The start offset and length of this compilation unit. |
45452591 | 529 | NOTE: Unlike comp_unit_head.length, this length includes |
3019eac3 DE |
530 | initial_length_size. |
531 | If the DIE refers to a DWO file, this is always of the original die, | |
532 | not the DWO file. */ | |
b64f50a1 | 533 | sect_offset offset; |
36586728 | 534 | unsigned int length; |
ae038cb0 DJ |
535 | |
536 | /* Flag indicating this compilation unit will be read in before | |
537 | any of the current compilation units are processed. */ | |
c764a876 | 538 | unsigned int queued : 1; |
ae038cb0 | 539 | |
0d99eb77 DE |
540 | /* This flag will be set when reading partial DIEs if we need to load |
541 | absolutely all DIEs for this compilation unit, instead of just the ones | |
542 | we think are interesting. It gets set if we look for a DIE in the | |
5afb4e99 DJ |
543 | hash table and don't find it. */ |
544 | unsigned int load_all_dies : 1; | |
545 | ||
0186c6a7 DE |
546 | /* Non-zero if this CU is from .debug_types. |
547 | Struct dwarf2_per_cu_data is contained in struct signatured_type iff | |
548 | this is non-zero. */ | |
3019eac3 DE |
549 | unsigned int is_debug_types : 1; |
550 | ||
36586728 TT |
551 | /* Non-zero if this CU is from the .dwz file. */ |
552 | unsigned int is_dwz : 1; | |
553 | ||
3019eac3 DE |
554 | /* The section this CU/TU lives in. |
555 | If the DIE refers to a DWO file, this is always the original die, | |
556 | not the DWO file. */ | |
8a0459fd | 557 | struct dwarf2_section_info *section; |
348e048f | 558 | |
17ea53c3 JK |
559 | /* Set to non-NULL iff this CU is currently loaded. When it gets freed out |
560 | of the CU cache it gets reset to NULL again. */ | |
ae038cb0 | 561 | struct dwarf2_cu *cu; |
1c379e20 | 562 | |
9cdd5dbd DE |
563 | /* The corresponding objfile. |
564 | Normally we can get the objfile from dwarf2_per_objfile. | |
565 | However we can enter this file with just a "per_cu" handle. */ | |
9291a0cd TT |
566 | struct objfile *objfile; |
567 | ||
568 | /* When using partial symbol tables, the 'psymtab' field is active. | |
569 | Otherwise the 'quick' field is active. */ | |
570 | union | |
571 | { | |
572 | /* The partial symbol table associated with this compilation unit, | |
95554aad | 573 | or NULL for unread partial units. */ |
9291a0cd TT |
574 | struct partial_symtab *psymtab; |
575 | ||
576 | /* Data needed by the "quick" functions. */ | |
577 | struct dwarf2_per_cu_quick_data *quick; | |
578 | } v; | |
95554aad | 579 | |
796a7ff8 DE |
580 | /* The CUs we import using DW_TAG_imported_unit. This is filled in |
581 | while reading psymtabs, used to compute the psymtab dependencies, | |
582 | and then cleared. Then it is filled in again while reading full | |
583 | symbols, and only deleted when the objfile is destroyed. | |
584 | ||
585 | This is also used to work around a difference between the way gold | |
586 | generates .gdb_index version <=7 and the way gdb does. Arguably this | |
587 | is a gold bug. For symbols coming from TUs, gold records in the index | |
588 | the CU that includes the TU instead of the TU itself. This breaks | |
589 | dw2_lookup_symbol: It assumes that if the index says symbol X lives | |
590 | in CU/TU Y, then one need only expand Y and a subsequent lookup in Y | |
591 | will find X. Alas TUs live in their own symtab, so after expanding CU Y | |
592 | we need to look in TU Z to find X. Fortunately, this is akin to | |
593 | DW_TAG_imported_unit, so we just use the same mechanism: For | |
594 | .gdb_index version <=7 this also records the TUs that the CU referred | |
595 | to. Concurrently with this change gdb was modified to emit version 8 | |
596 | indices so we only pay a price for gold generated indices. */ | |
597 | VEC (dwarf2_per_cu_ptr) *imported_symtabs; | |
ae038cb0 DJ |
598 | }; |
599 | ||
348e048f DE |
600 | /* Entry in the signatured_types hash table. */ |
601 | ||
602 | struct signatured_type | |
603 | { | |
42e7ad6c | 604 | /* The "per_cu" object of this type. |
ac9ec31b | 605 | This struct is used iff per_cu.is_debug_types. |
42e7ad6c DE |
606 | N.B.: This is the first member so that it's easy to convert pointers |
607 | between them. */ | |
608 | struct dwarf2_per_cu_data per_cu; | |
609 | ||
3019eac3 | 610 | /* The type's signature. */ |
348e048f DE |
611 | ULONGEST signature; |
612 | ||
3019eac3 | 613 | /* Offset in the TU of the type's DIE, as read from the TU header. |
c88ee1f0 DE |
614 | If this TU is a DWO stub and the definition lives in a DWO file |
615 | (specified by DW_AT_GNU_dwo_name), this value is unusable. */ | |
3019eac3 DE |
616 | cu_offset type_offset_in_tu; |
617 | ||
618 | /* Offset in the section of the type's DIE. | |
619 | If the definition lives in a DWO file, this is the offset in the | |
620 | .debug_types.dwo section. | |
621 | The value is zero until the actual value is known. | |
622 | Zero is otherwise not a valid section offset. */ | |
623 | sect_offset type_offset_in_section; | |
0186c6a7 DE |
624 | |
625 | /* Type units are grouped by their DW_AT_stmt_list entry so that they | |
626 | can share them. This points to the containing symtab. */ | |
627 | struct type_unit_group *type_unit_group; | |
ac9ec31b DE |
628 | |
629 | /* The type. | |
630 | The first time we encounter this type we fully read it in and install it | |
631 | in the symbol tables. Subsequent times we only need the type. */ | |
632 | struct type *type; | |
348e048f DE |
633 | }; |
634 | ||
0186c6a7 DE |
635 | typedef struct signatured_type *sig_type_ptr; |
636 | DEF_VEC_P (sig_type_ptr); | |
637 | ||
094b34ac DE |
638 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
639 | This includes type_unit_group and quick_file_names. */ | |
640 | ||
641 | struct stmt_list_hash | |
642 | { | |
643 | /* The DWO unit this table is from or NULL if there is none. */ | |
644 | struct dwo_unit *dwo_unit; | |
645 | ||
646 | /* Offset in .debug_line or .debug_line.dwo. */ | |
647 | sect_offset line_offset; | |
648 | }; | |
649 | ||
f4dc4d17 DE |
650 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
651 | an object of this type. */ | |
652 | ||
653 | struct type_unit_group | |
654 | { | |
0186c6a7 | 655 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
656 | To simplify things we create an artificial CU that "includes" all the |
657 | type units using this stmt_list so that the rest of the code still has | |
658 | a "per_cu" handle on the symtab. | |
659 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 660 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
661 | struct dwarf2_per_cu_data per_cu; |
662 | ||
0186c6a7 DE |
663 | /* The TUs that share this DW_AT_stmt_list entry. |
664 | This is added to while parsing type units to build partial symtabs, | |
665 | and is deleted afterwards and not used again. */ | |
666 | VEC (sig_type_ptr) *tus; | |
f4dc4d17 DE |
667 | |
668 | /* The primary symtab. | |
094b34ac DE |
669 | Type units in a group needn't all be defined in the same source file, |
670 | so we create an essentially anonymous symtab as the primary symtab. */ | |
f4dc4d17 DE |
671 | struct symtab *primary_symtab; |
672 | ||
094b34ac DE |
673 | /* The data used to construct the hash key. */ |
674 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
675 | |
676 | /* The number of symtabs from the line header. | |
677 | The value here must match line_header.num_file_names. */ | |
678 | unsigned int num_symtabs; | |
679 | ||
680 | /* The symbol tables for this TU (obtained from the files listed in | |
681 | DW_AT_stmt_list). | |
682 | WARNING: The order of entries here must match the order of entries | |
683 | in the line header. After the first TU using this type_unit_group, the | |
684 | line header for the subsequent TUs is recreated from this. This is done | |
685 | because we need to use the same symtabs for each TU using the same | |
686 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
687 | there's no guarantee the line header doesn't have duplicate entries. */ | |
688 | struct symtab **symtabs; | |
689 | }; | |
690 | ||
80626a55 | 691 | /* These sections are what may appear in a DWO file. */ |
3019eac3 DE |
692 | |
693 | struct dwo_sections | |
694 | { | |
695 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
696 | struct dwarf2_section_info line; |
697 | struct dwarf2_section_info loc; | |
09262596 DE |
698 | struct dwarf2_section_info macinfo; |
699 | struct dwarf2_section_info macro; | |
3019eac3 DE |
700 | struct dwarf2_section_info str; |
701 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
702 | /* In the case of a virtual DWO file, these two are unused. */ |
703 | struct dwarf2_section_info info; | |
3019eac3 DE |
704 | VEC (dwarf2_section_info_def) *types; |
705 | }; | |
706 | ||
c88ee1f0 | 707 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
708 | |
709 | struct dwo_unit | |
710 | { | |
711 | /* Backlink to the containing struct dwo_file. */ | |
712 | struct dwo_file *dwo_file; | |
713 | ||
714 | /* The "id" that distinguishes this CU/TU. | |
715 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
716 | Since signatures came first, we stick with it for consistency. */ | |
717 | ULONGEST signature; | |
718 | ||
719 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 720 | struct dwarf2_section_info *section; |
3019eac3 DE |
721 | |
722 | /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */ | |
723 | sect_offset offset; | |
724 | unsigned int length; | |
725 | ||
726 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
727 | cu_offset type_offset_in_tu; | |
728 | }; | |
729 | ||
80626a55 DE |
730 | /* Data for one DWO file. |
731 | This includes virtual DWO files that have been packaged into a | |
732 | DWP file. */ | |
3019eac3 DE |
733 | |
734 | struct dwo_file | |
735 | { | |
0ac5b59e | 736 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
737 | For virtual DWO files the name is constructed from the section offsets |
738 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
739 | from related CU+TUs. */ | |
0ac5b59e DE |
740 | const char *dwo_name; |
741 | ||
742 | /* The DW_AT_comp_dir attribute. */ | |
743 | const char *comp_dir; | |
3019eac3 | 744 | |
80626a55 DE |
745 | /* The bfd, when the file is open. Otherwise this is NULL. |
746 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
747 | bfd *dbfd; | |
3019eac3 DE |
748 | |
749 | /* Section info for this file. */ | |
750 | struct dwo_sections sections; | |
751 | ||
19c3d4c9 DE |
752 | /* The CU in the file. |
753 | We only support one because having more than one requires hacking the | |
754 | dwo_name of each to match, which is highly unlikely to happen. | |
755 | Doing this means all TUs can share comp_dir: We also assume that | |
756 | DW_AT_comp_dir across all TUs in a DWO file will be identical. */ | |
757 | struct dwo_unit *cu; | |
3019eac3 DE |
758 | |
759 | /* Table of TUs in the file. | |
760 | Each element is a struct dwo_unit. */ | |
761 | htab_t tus; | |
762 | }; | |
763 | ||
80626a55 DE |
764 | /* These sections are what may appear in a DWP file. */ |
765 | ||
766 | struct dwp_sections | |
767 | { | |
768 | struct dwarf2_section_info str; | |
769 | struct dwarf2_section_info cu_index; | |
770 | struct dwarf2_section_info tu_index; | |
771 | /* The .debug_info.dwo, .debug_types.dwo, and other sections are referenced | |
772 | by section number. We don't need to record them here. */ | |
773 | }; | |
774 | ||
775 | /* These sections are what may appear in a virtual DWO file. */ | |
776 | ||
777 | struct virtual_dwo_sections | |
778 | { | |
779 | struct dwarf2_section_info abbrev; | |
780 | struct dwarf2_section_info line; | |
781 | struct dwarf2_section_info loc; | |
782 | struct dwarf2_section_info macinfo; | |
783 | struct dwarf2_section_info macro; | |
784 | struct dwarf2_section_info str_offsets; | |
785 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 786 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
787 | struct dwarf2_section_info info_or_types; |
788 | }; | |
789 | ||
790 | /* Contents of DWP hash tables. */ | |
791 | ||
792 | struct dwp_hash_table | |
793 | { | |
794 | uint32_t nr_units, nr_slots; | |
795 | const gdb_byte *hash_table, *unit_table, *section_pool; | |
796 | }; | |
797 | ||
798 | /* Data for one DWP file. */ | |
799 | ||
800 | struct dwp_file | |
801 | { | |
802 | /* Name of the file. */ | |
803 | const char *name; | |
804 | ||
805 | /* The bfd, when the file is open. Otherwise this is NULL. */ | |
806 | bfd *dbfd; | |
807 | ||
808 | /* Section info for this file. */ | |
809 | struct dwp_sections sections; | |
810 | ||
811 | /* Table of CUs in the file. */ | |
812 | const struct dwp_hash_table *cus; | |
813 | ||
814 | /* Table of TUs in the file. */ | |
815 | const struct dwp_hash_table *tus; | |
816 | ||
817 | /* Table of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ | |
818 | htab_t loaded_cutus; | |
819 | ||
820 | /* Table to map ELF section numbers to their sections. */ | |
821 | unsigned int num_sections; | |
822 | asection **elf_sections; | |
823 | }; | |
824 | ||
36586728 TT |
825 | /* This represents a '.dwz' file. */ |
826 | ||
827 | struct dwz_file | |
828 | { | |
829 | /* A dwz file can only contain a few sections. */ | |
830 | struct dwarf2_section_info abbrev; | |
831 | struct dwarf2_section_info info; | |
832 | struct dwarf2_section_info str; | |
833 | struct dwarf2_section_info line; | |
834 | struct dwarf2_section_info macro; | |
2ec9a5e0 | 835 | struct dwarf2_section_info gdb_index; |
36586728 TT |
836 | |
837 | /* The dwz's BFD. */ | |
838 | bfd *dwz_bfd; | |
839 | }; | |
840 | ||
0963b4bd MS |
841 | /* Struct used to pass misc. parameters to read_die_and_children, et |
842 | al. which are used for both .debug_info and .debug_types dies. | |
843 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 844 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
845 | |
846 | struct die_reader_specs | |
847 | { | |
dee91e82 | 848 | /* die_section->asection->owner. */ |
93311388 DE |
849 | bfd* abfd; |
850 | ||
851 | /* The CU of the DIE we are parsing. */ | |
852 | struct dwarf2_cu *cu; | |
853 | ||
80626a55 | 854 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
855 | struct dwo_file *dwo_file; |
856 | ||
dee91e82 | 857 | /* The section the die comes from. |
3019eac3 | 858 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
859 | struct dwarf2_section_info *die_section; |
860 | ||
861 | /* die_section->buffer. */ | |
d521ce57 | 862 | const gdb_byte *buffer; |
f664829e DE |
863 | |
864 | /* The end of the buffer. */ | |
865 | const gdb_byte *buffer_end; | |
93311388 DE |
866 | }; |
867 | ||
fd820528 | 868 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 869 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 870 | const gdb_byte *info_ptr, |
dee91e82 DE |
871 | struct die_info *comp_unit_die, |
872 | int has_children, | |
873 | void *data); | |
874 | ||
debd256d JB |
875 | /* The line number information for a compilation unit (found in the |
876 | .debug_line section) begins with a "statement program header", | |
877 | which contains the following information. */ | |
878 | struct line_header | |
879 | { | |
880 | unsigned int total_length; | |
881 | unsigned short version; | |
882 | unsigned int header_length; | |
883 | unsigned char minimum_instruction_length; | |
2dc7f7b3 | 884 | unsigned char maximum_ops_per_instruction; |
debd256d JB |
885 | unsigned char default_is_stmt; |
886 | int line_base; | |
887 | unsigned char line_range; | |
888 | unsigned char opcode_base; | |
889 | ||
890 | /* standard_opcode_lengths[i] is the number of operands for the | |
891 | standard opcode whose value is i. This means that | |
892 | standard_opcode_lengths[0] is unused, and the last meaningful | |
893 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
894 | unsigned char *standard_opcode_lengths; | |
895 | ||
896 | /* The include_directories table. NOTE! These strings are not | |
897 | allocated with xmalloc; instead, they are pointers into | |
898 | debug_line_buffer. If you try to free them, `free' will get | |
899 | indigestion. */ | |
900 | unsigned int num_include_dirs, include_dirs_size; | |
d521ce57 | 901 | const char **include_dirs; |
debd256d JB |
902 | |
903 | /* The file_names table. NOTE! These strings are not allocated | |
904 | with xmalloc; instead, they are pointers into debug_line_buffer. | |
905 | Don't try to free them directly. */ | |
906 | unsigned int num_file_names, file_names_size; | |
907 | struct file_entry | |
c906108c | 908 | { |
d521ce57 | 909 | const char *name; |
debd256d JB |
910 | unsigned int dir_index; |
911 | unsigned int mod_time; | |
912 | unsigned int length; | |
aaa75496 | 913 | int included_p; /* Non-zero if referenced by the Line Number Program. */ |
cb1df416 | 914 | struct symtab *symtab; /* The associated symbol table, if any. */ |
debd256d JB |
915 | } *file_names; |
916 | ||
917 | /* The start and end of the statement program following this | |
6502dd73 | 918 | header. These point into dwarf2_per_objfile->line_buffer. */ |
d521ce57 | 919 | const gdb_byte *statement_program_start, *statement_program_end; |
debd256d | 920 | }; |
c906108c SS |
921 | |
922 | /* When we construct a partial symbol table entry we only | |
0963b4bd | 923 | need this much information. */ |
c906108c SS |
924 | struct partial_die_info |
925 | { | |
72bf9492 | 926 | /* Offset of this DIE. */ |
b64f50a1 | 927 | sect_offset offset; |
72bf9492 DJ |
928 | |
929 | /* DWARF-2 tag for this DIE. */ | |
930 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
931 | ||
72bf9492 DJ |
932 | /* Assorted flags describing the data found in this DIE. */ |
933 | unsigned int has_children : 1; | |
934 | unsigned int is_external : 1; | |
935 | unsigned int is_declaration : 1; | |
936 | unsigned int has_type : 1; | |
937 | unsigned int has_specification : 1; | |
938 | unsigned int has_pc_info : 1; | |
481860b3 | 939 | unsigned int may_be_inlined : 1; |
72bf9492 DJ |
940 | |
941 | /* Flag set if the SCOPE field of this structure has been | |
942 | computed. */ | |
943 | unsigned int scope_set : 1; | |
944 | ||
fa4028e9 JB |
945 | /* Flag set if the DIE has a byte_size attribute. */ |
946 | unsigned int has_byte_size : 1; | |
947 | ||
98bfdba5 PA |
948 | /* Flag set if any of the DIE's children are template arguments. */ |
949 | unsigned int has_template_arguments : 1; | |
950 | ||
abc72ce4 DE |
951 | /* Flag set if fixup_partial_die has been called on this die. */ |
952 | unsigned int fixup_called : 1; | |
953 | ||
36586728 TT |
954 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
955 | unsigned int is_dwz : 1; | |
956 | ||
957 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
958 | unsigned int spec_is_dwz : 1; | |
959 | ||
72bf9492 | 960 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 961 | sometimes a default name for unnamed DIEs. */ |
15d034d0 | 962 | const char *name; |
72bf9492 | 963 | |
abc72ce4 DE |
964 | /* The linkage name, if present. */ |
965 | const char *linkage_name; | |
966 | ||
72bf9492 DJ |
967 | /* The scope to prepend to our children. This is generally |
968 | allocated on the comp_unit_obstack, so will disappear | |
969 | when this compilation unit leaves the cache. */ | |
15d034d0 | 970 | const char *scope; |
72bf9492 | 971 | |
95554aad TT |
972 | /* Some data associated with the partial DIE. The tag determines |
973 | which field is live. */ | |
974 | union | |
975 | { | |
976 | /* The location description associated with this DIE, if any. */ | |
977 | struct dwarf_block *locdesc; | |
978 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
979 | sect_offset offset; | |
980 | } d; | |
72bf9492 DJ |
981 | |
982 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
c906108c SS |
983 | CORE_ADDR lowpc; |
984 | CORE_ADDR highpc; | |
72bf9492 | 985 | |
93311388 | 986 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 987 | DW_AT_sibling, if any. */ |
abc72ce4 DE |
988 | /* NOTE: This member isn't strictly necessary, read_partial_die could |
989 | return DW_AT_sibling values to its caller load_partial_dies. */ | |
d521ce57 | 990 | const gdb_byte *sibling; |
72bf9492 DJ |
991 | |
992 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
993 | DW_AT_specification (or DW_AT_abstract_origin or | |
994 | DW_AT_extension). */ | |
b64f50a1 | 995 | sect_offset spec_offset; |
72bf9492 DJ |
996 | |
997 | /* Pointers to this DIE's parent, first child, and next sibling, | |
998 | if any. */ | |
999 | struct partial_die_info *die_parent, *die_child, *die_sibling; | |
c906108c SS |
1000 | }; |
1001 | ||
0963b4bd | 1002 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1003 | struct abbrev_info |
1004 | { | |
1005 | unsigned int number; /* number identifying abbrev */ | |
1006 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1007 | unsigned short has_children; /* boolean */ |
1008 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1009 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1010 | struct abbrev_info *next; /* next in chain */ | |
1011 | }; | |
1012 | ||
1013 | struct attr_abbrev | |
1014 | { | |
9d25dd43 DE |
1015 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1016 | ENUM_BITFIELD(dwarf_form) form : 16; | |
c906108c SS |
1017 | }; |
1018 | ||
433df2d4 DE |
1019 | /* Size of abbrev_table.abbrev_hash_table. */ |
1020 | #define ABBREV_HASH_SIZE 121 | |
1021 | ||
1022 | /* Top level data structure to contain an abbreviation table. */ | |
1023 | ||
1024 | struct abbrev_table | |
1025 | { | |
f4dc4d17 DE |
1026 | /* Where the abbrev table came from. |
1027 | This is used as a sanity check when the table is used. */ | |
433df2d4 DE |
1028 | sect_offset offset; |
1029 | ||
1030 | /* Storage for the abbrev table. */ | |
1031 | struct obstack abbrev_obstack; | |
1032 | ||
1033 | /* Hash table of abbrevs. | |
1034 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1035 | It could be statically allocated, but the previous code didn't so we | |
1036 | don't either. */ | |
1037 | struct abbrev_info **abbrevs; | |
1038 | }; | |
1039 | ||
0963b4bd | 1040 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1041 | struct attribute |
1042 | { | |
9d25dd43 | 1043 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1044 | ENUM_BITFIELD(dwarf_form) form : 15; |
1045 | ||
1046 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1047 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1048 | here for better struct attribute alignment. */ | |
1049 | unsigned int string_is_canonical : 1; | |
1050 | ||
b60c80d6 DJ |
1051 | union |
1052 | { | |
15d034d0 | 1053 | const char *str; |
b60c80d6 | 1054 | struct dwarf_block *blk; |
43bbcdc2 PH |
1055 | ULONGEST unsnd; |
1056 | LONGEST snd; | |
b60c80d6 | 1057 | CORE_ADDR addr; |
ac9ec31b | 1058 | ULONGEST signature; |
b60c80d6 DJ |
1059 | } |
1060 | u; | |
1061 | }; | |
1062 | ||
0963b4bd | 1063 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1064 | struct die_info |
1065 | { | |
76815b17 DE |
1066 | /* DWARF-2 tag for this DIE. */ |
1067 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1068 | ||
1069 | /* Number of attributes */ | |
98bfdba5 PA |
1070 | unsigned char num_attrs; |
1071 | ||
1072 | /* True if we're presently building the full type name for the | |
1073 | type derived from this DIE. */ | |
1074 | unsigned char building_fullname : 1; | |
76815b17 DE |
1075 | |
1076 | /* Abbrev number */ | |
1077 | unsigned int abbrev; | |
1078 | ||
93311388 | 1079 | /* Offset in .debug_info or .debug_types section. */ |
b64f50a1 | 1080 | sect_offset offset; |
78ba4af6 JB |
1081 | |
1082 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1083 | points to this die's parent; CHILD points to the first child of | |
1084 | this node; and all the children of a given node are chained | |
4950bc1c | 1085 | together via their SIBLING fields. */ |
639d11d3 DC |
1086 | struct die_info *child; /* Its first child, if any. */ |
1087 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1088 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1089 | |
b60c80d6 DJ |
1090 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1091 | zero, but it's not common and zero-sized arrays are not | |
1092 | sufficiently portable C. */ | |
1093 | struct attribute attrs[1]; | |
c906108c SS |
1094 | }; |
1095 | ||
0963b4bd | 1096 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1097 | |
1098 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1099 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1100 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1101 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1102 | #define DW_SND(attr) ((attr)->u.snd) | |
1103 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1104 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1105 | |
0963b4bd | 1106 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1107 | struct dwarf_block |
1108 | { | |
56eb65bd | 1109 | size_t size; |
1d6edc3c JK |
1110 | |
1111 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1112 | const gdb_byte *data; |
c906108c SS |
1113 | }; |
1114 | ||
c906108c SS |
1115 | #ifndef ATTR_ALLOC_CHUNK |
1116 | #define ATTR_ALLOC_CHUNK 4 | |
1117 | #endif | |
1118 | ||
c906108c SS |
1119 | /* Allocate fields for structs, unions and enums in this size. */ |
1120 | #ifndef DW_FIELD_ALLOC_CHUNK | |
1121 | #define DW_FIELD_ALLOC_CHUNK 4 | |
1122 | #endif | |
1123 | ||
c906108c SS |
1124 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1125 | but this would require a corresponding change in unpack_field_as_long | |
1126 | and friends. */ | |
1127 | static int bits_per_byte = 8; | |
1128 | ||
1129 | /* The routines that read and process dies for a C struct or C++ class | |
1130 | pass lists of data member fields and lists of member function fields | |
1131 | in an instance of a field_info structure, as defined below. */ | |
1132 | struct field_info | |
c5aa993b | 1133 | { |
0963b4bd | 1134 | /* List of data member and baseclasses fields. */ |
c5aa993b JM |
1135 | struct nextfield |
1136 | { | |
1137 | struct nextfield *next; | |
1138 | int accessibility; | |
1139 | int virtuality; | |
1140 | struct field field; | |
1141 | } | |
7d0ccb61 | 1142 | *fields, *baseclasses; |
c906108c | 1143 | |
7d0ccb61 | 1144 | /* Number of fields (including baseclasses). */ |
c5aa993b | 1145 | int nfields; |
c906108c | 1146 | |
c5aa993b JM |
1147 | /* Number of baseclasses. */ |
1148 | int nbaseclasses; | |
c906108c | 1149 | |
c5aa993b JM |
1150 | /* Set if the accesibility of one of the fields is not public. */ |
1151 | int non_public_fields; | |
c906108c | 1152 | |
c5aa993b JM |
1153 | /* Member function fields array, entries are allocated in the order they |
1154 | are encountered in the object file. */ | |
1155 | struct nextfnfield | |
1156 | { | |
1157 | struct nextfnfield *next; | |
1158 | struct fn_field fnfield; | |
1159 | } | |
1160 | *fnfields; | |
c906108c | 1161 | |
c5aa993b JM |
1162 | /* Member function fieldlist array, contains name of possibly overloaded |
1163 | member function, number of overloaded member functions and a pointer | |
1164 | to the head of the member function field chain. */ | |
1165 | struct fnfieldlist | |
1166 | { | |
15d034d0 | 1167 | const char *name; |
c5aa993b JM |
1168 | int length; |
1169 | struct nextfnfield *head; | |
1170 | } | |
1171 | *fnfieldlists; | |
c906108c | 1172 | |
c5aa993b JM |
1173 | /* Number of entries in the fnfieldlists array. */ |
1174 | int nfnfields; | |
98751a41 JK |
1175 | |
1176 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1177 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1178 | struct typedef_field_list | |
1179 | { | |
1180 | struct typedef_field field; | |
1181 | struct typedef_field_list *next; | |
1182 | } | |
1183 | *typedef_field_list; | |
1184 | unsigned typedef_field_list_count; | |
c5aa993b | 1185 | }; |
c906108c | 1186 | |
10b3939b DJ |
1187 | /* One item on the queue of compilation units to read in full symbols |
1188 | for. */ | |
1189 | struct dwarf2_queue_item | |
1190 | { | |
1191 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1192 | enum language pretend_language; |
10b3939b DJ |
1193 | struct dwarf2_queue_item *next; |
1194 | }; | |
1195 | ||
1196 | /* The current queue. */ | |
1197 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1198 | ||
ae038cb0 DJ |
1199 | /* Loaded secondary compilation units are kept in memory until they |
1200 | have not been referenced for the processing of this many | |
1201 | compilation units. Set this to zero to disable caching. Cache | |
1202 | sizes of up to at least twenty will improve startup time for | |
1203 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
1204 | static int dwarf2_max_cache_age = 5; | |
920d2a44 AC |
1205 | static void |
1206 | show_dwarf2_max_cache_age (struct ui_file *file, int from_tty, | |
1207 | struct cmd_list_element *c, const char *value) | |
1208 | { | |
3e43a32a MS |
1209 | fprintf_filtered (file, _("The upper bound on the age of cached " |
1210 | "dwarf2 compilation units is %s.\n"), | |
920d2a44 AC |
1211 | value); |
1212 | } | |
1213 | ||
ae038cb0 | 1214 | |
0963b4bd | 1215 | /* Various complaints about symbol reading that don't abort the process. */ |
c906108c | 1216 | |
4d3c2250 KB |
1217 | static void |
1218 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2e276125 | 1219 | { |
4d3c2250 | 1220 | complaint (&symfile_complaints, |
e2e0b3e5 | 1221 | _("statement list doesn't fit in .debug_line section")); |
4d3c2250 KB |
1222 | } |
1223 | ||
25e43795 DJ |
1224 | static void |
1225 | dwarf2_debug_line_missing_file_complaint (void) | |
1226 | { | |
1227 | complaint (&symfile_complaints, | |
1228 | _(".debug_line section has line data without a file")); | |
1229 | } | |
1230 | ||
59205f5a JB |
1231 | static void |
1232 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1233 | { | |
1234 | complaint (&symfile_complaints, | |
3e43a32a MS |
1235 | _(".debug_line section has line " |
1236 | "program sequence without an end")); | |
59205f5a JB |
1237 | } |
1238 | ||
4d3c2250 KB |
1239 | static void |
1240 | dwarf2_complex_location_expr_complaint (void) | |
2e276125 | 1241 | { |
e2e0b3e5 | 1242 | complaint (&symfile_complaints, _("location expression too complex")); |
4d3c2250 KB |
1243 | } |
1244 | ||
4d3c2250 KB |
1245 | static void |
1246 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1247 | int arg3) | |
2e276125 | 1248 | { |
4d3c2250 | 1249 | complaint (&symfile_complaints, |
3e43a32a MS |
1250 | _("const value length mismatch for '%s', got %d, expected %d"), |
1251 | arg1, arg2, arg3); | |
4d3c2250 KB |
1252 | } |
1253 | ||
1254 | static void | |
f664829e | 1255 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) |
2e276125 | 1256 | { |
4d3c2250 | 1257 | complaint (&symfile_complaints, |
f664829e DE |
1258 | _("debug info runs off end of %s section" |
1259 | " [in module %s]"), | |
1260 | section->asection->name, | |
1261 | bfd_get_filename (section->asection->owner)); | |
4d3c2250 KB |
1262 | } |
1263 | ||
1264 | static void | |
1265 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
8e19ed76 | 1266 | { |
4d3c2250 | 1267 | complaint (&symfile_complaints, |
3e43a32a MS |
1268 | _("macro debug info contains a " |
1269 | "malformed macro definition:\n`%s'"), | |
4d3c2250 KB |
1270 | arg1); |
1271 | } | |
1272 | ||
1273 | static void | |
1274 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
8b2dbe47 | 1275 | { |
4d3c2250 | 1276 | complaint (&symfile_complaints, |
3e43a32a MS |
1277 | _("invalid attribute class or form for '%s' in '%s'"), |
1278 | arg1, arg2); | |
4d3c2250 | 1279 | } |
c906108c | 1280 | |
c906108c SS |
1281 | /* local function prototypes */ |
1282 | ||
4efb68b1 | 1283 | static void dwarf2_locate_sections (bfd *, asection *, void *); |
c906108c | 1284 | |
918dd910 JK |
1285 | static void dwarf2_find_base_address (struct die_info *die, |
1286 | struct dwarf2_cu *cu); | |
1287 | ||
0018ea6f DE |
1288 | static struct partial_symtab *create_partial_symtab |
1289 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1290 | ||
c67a9c90 | 1291 | static void dwarf2_build_psymtabs_hard (struct objfile *); |
c906108c | 1292 | |
72bf9492 DJ |
1293 | static void scan_partial_symbols (struct partial_die_info *, |
1294 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1295 | int, struct dwarf2_cu *); |
c906108c | 1296 | |
72bf9492 DJ |
1297 | static void add_partial_symbol (struct partial_die_info *, |
1298 | struct dwarf2_cu *); | |
63d06c5c | 1299 | |
72bf9492 DJ |
1300 | static void add_partial_namespace (struct partial_die_info *pdi, |
1301 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1302 | int need_pc, struct dwarf2_cu *cu); |
63d06c5c | 1303 | |
5d7cb8df JK |
1304 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
1305 | CORE_ADDR *highpc, int need_pc, | |
1306 | struct dwarf2_cu *cu); | |
1307 | ||
72bf9492 DJ |
1308 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1309 | struct dwarf2_cu *cu); | |
91c24f0a | 1310 | |
bc30ff58 JB |
1311 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1312 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1313 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1314 | |
257e7a09 YQ |
1315 | static void dwarf2_read_symtab (struct partial_symtab *, |
1316 | struct objfile *); | |
c906108c | 1317 | |
a14ed312 | 1318 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1319 | |
433df2d4 DE |
1320 | static struct abbrev_info *abbrev_table_lookup_abbrev |
1321 | (const struct abbrev_table *, unsigned int); | |
1322 | ||
1323 | static struct abbrev_table *abbrev_table_read_table | |
1324 | (struct dwarf2_section_info *, sect_offset); | |
1325 | ||
1326 | static void abbrev_table_free (struct abbrev_table *); | |
1327 | ||
f4dc4d17 DE |
1328 | static void abbrev_table_free_cleanup (void *); |
1329 | ||
dee91e82 DE |
1330 | static void dwarf2_read_abbrevs (struct dwarf2_cu *, |
1331 | struct dwarf2_section_info *); | |
c906108c | 1332 | |
f3dd6933 | 1333 | static void dwarf2_free_abbrev_table (void *); |
c906108c | 1334 | |
d521ce57 | 1335 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1336 | |
dee91e82 | 1337 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1338 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1339 | |
d521ce57 TT |
1340 | static const gdb_byte *read_partial_die (const struct die_reader_specs *, |
1341 | struct partial_die_info *, | |
1342 | struct abbrev_info *, | |
1343 | unsigned int, | |
1344 | const gdb_byte *); | |
c906108c | 1345 | |
36586728 | 1346 | static struct partial_die_info *find_partial_die (sect_offset, int, |
10b3939b | 1347 | struct dwarf2_cu *); |
72bf9492 DJ |
1348 | |
1349 | static void fixup_partial_die (struct partial_die_info *, | |
1350 | struct dwarf2_cu *); | |
1351 | ||
d521ce57 TT |
1352 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1353 | struct attribute *, struct attr_abbrev *, | |
1354 | const gdb_byte *); | |
a8329558 | 1355 | |
a1855c1d | 1356 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1357 | |
a1855c1d | 1358 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1359 | |
a1855c1d | 1360 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1361 | |
a1855c1d | 1362 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1363 | |
a1855c1d | 1364 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1365 | |
d521ce57 | 1366 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1367 | unsigned int *); |
c906108c | 1368 | |
d521ce57 | 1369 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1370 | |
1371 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1372 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1373 | unsigned int *, unsigned int *); |
613e1657 | 1374 | |
d521ce57 TT |
1375 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1376 | const struct comp_unit_head *, | |
c764a876 DE |
1377 | unsigned int *); |
1378 | ||
d521ce57 | 1379 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1380 | |
f4dc4d17 DE |
1381 | static sect_offset read_abbrev_offset (struct dwarf2_section_info *, |
1382 | sect_offset); | |
1383 | ||
d521ce57 | 1384 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1385 | |
d521ce57 | 1386 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1387 | |
d521ce57 TT |
1388 | static const char *read_indirect_string (bfd *, const gdb_byte *, |
1389 | const struct comp_unit_head *, | |
1390 | unsigned int *); | |
4bdf3d34 | 1391 | |
d521ce57 | 1392 | static const char *read_indirect_string_from_dwz (struct dwz_file *, LONGEST); |
36586728 | 1393 | |
d521ce57 | 1394 | static ULONGEST read_unsigned_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1395 | |
d521ce57 | 1396 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1397 | |
d521ce57 TT |
1398 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1399 | const gdb_byte *, | |
3019eac3 DE |
1400 | unsigned int *); |
1401 | ||
d521ce57 TT |
1402 | static const char *read_str_index (const struct die_reader_specs *reader, |
1403 | struct dwarf2_cu *cu, ULONGEST str_index); | |
3019eac3 | 1404 | |
e142c38c | 1405 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1406 | |
e142c38c DJ |
1407 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1408 | struct dwarf2_cu *); | |
c906108c | 1409 | |
348e048f | 1410 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1411 | unsigned int); |
348e048f | 1412 | |
05cf31d1 JB |
1413 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1414 | struct dwarf2_cu *cu); | |
1415 | ||
e142c38c | 1416 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1417 | |
e142c38c | 1418 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1419 | struct dwarf2_cu **); |
63d06c5c | 1420 | |
debd256d JB |
1421 | static void free_line_header (struct line_header *lh); |
1422 | ||
3019eac3 DE |
1423 | static struct line_header *dwarf_decode_line_header (unsigned int offset, |
1424 | struct dwarf2_cu *cu); | |
debd256d | 1425 | |
f3f5162e DE |
1426 | static void dwarf_decode_lines (struct line_header *, const char *, |
1427 | struct dwarf2_cu *, struct partial_symtab *, | |
1428 | int); | |
c906108c | 1429 | |
d521ce57 | 1430 | static void dwarf2_start_subfile (const char *, const char *, const char *); |
c906108c | 1431 | |
f4dc4d17 | 1432 | static void dwarf2_start_symtab (struct dwarf2_cu *, |
15d034d0 | 1433 | const char *, const char *, CORE_ADDR); |
f4dc4d17 | 1434 | |
a14ed312 | 1435 | static struct symbol *new_symbol (struct die_info *, struct type *, |
e7c27a73 | 1436 | struct dwarf2_cu *); |
c906108c | 1437 | |
34eaf542 TT |
1438 | static struct symbol *new_symbol_full (struct die_info *, struct type *, |
1439 | struct dwarf2_cu *, struct symbol *); | |
1440 | ||
a14ed312 | 1441 | static void dwarf2_const_value (struct attribute *, struct symbol *, |
e7c27a73 | 1442 | struct dwarf2_cu *); |
c906108c | 1443 | |
98bfdba5 PA |
1444 | static void dwarf2_const_value_attr (struct attribute *attr, |
1445 | struct type *type, | |
1446 | const char *name, | |
1447 | struct obstack *obstack, | |
12df843f | 1448 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1449 | const gdb_byte **bytes, |
98bfdba5 | 1450 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1451 | |
e7c27a73 | 1452 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1453 | |
b4ba55a1 JB |
1454 | static int need_gnat_info (struct dwarf2_cu *); |
1455 | ||
3e43a32a MS |
1456 | static struct type *die_descriptive_type (struct die_info *, |
1457 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1458 | |
1459 | static void set_descriptive_type (struct type *, struct die_info *, | |
1460 | struct dwarf2_cu *); | |
1461 | ||
e7c27a73 DJ |
1462 | static struct type *die_containing_type (struct die_info *, |
1463 | struct dwarf2_cu *); | |
c906108c | 1464 | |
673bfd45 DE |
1465 | static struct type *lookup_die_type (struct die_info *, struct attribute *, |
1466 | struct dwarf2_cu *); | |
c906108c | 1467 | |
f792889a | 1468 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1469 | |
673bfd45 DE |
1470 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1471 | ||
0d5cff50 | 1472 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1473 | |
6e70227d | 1474 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1475 | const char *suffix, int physname, |
1476 | struct dwarf2_cu *cu); | |
63d06c5c | 1477 | |
e7c27a73 | 1478 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1479 | |
348e048f DE |
1480 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1481 | ||
e7c27a73 | 1482 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1483 | |
e7c27a73 | 1484 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1485 | |
96408a79 SA |
1486 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1487 | ||
ff013f42 JK |
1488 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1489 | struct dwarf2_cu *, struct partial_symtab *); | |
1490 | ||
a14ed312 | 1491 | static int dwarf2_get_pc_bounds (struct die_info *, |
d85a05f0 DJ |
1492 | CORE_ADDR *, CORE_ADDR *, struct dwarf2_cu *, |
1493 | struct partial_symtab *); | |
c906108c | 1494 | |
fae299cd DC |
1495 | static void get_scope_pc_bounds (struct die_info *, |
1496 | CORE_ADDR *, CORE_ADDR *, | |
1497 | struct dwarf2_cu *); | |
1498 | ||
801e3a5b JB |
1499 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1500 | CORE_ADDR, struct dwarf2_cu *); | |
1501 | ||
a14ed312 | 1502 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1503 | struct dwarf2_cu *); |
c906108c | 1504 | |
a14ed312 | 1505 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1506 | struct type *, struct dwarf2_cu *); |
c906108c | 1507 | |
a14ed312 | 1508 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1509 | struct die_info *, struct type *, |
e7c27a73 | 1510 | struct dwarf2_cu *); |
c906108c | 1511 | |
a14ed312 | 1512 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1513 | struct type *, |
1514 | struct dwarf2_cu *); | |
c906108c | 1515 | |
134d01f1 | 1516 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1517 | |
e7c27a73 | 1518 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1519 | |
e7c27a73 | 1520 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1521 | |
5d7cb8df JK |
1522 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1523 | ||
27aa8d6a SW |
1524 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1525 | ||
f55ee35c JK |
1526 | static struct type *read_module_type (struct die_info *die, |
1527 | struct dwarf2_cu *cu); | |
1528 | ||
38d518c9 | 1529 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1530 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1531 | |
134d01f1 | 1532 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1533 | |
e7c27a73 | 1534 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1535 | |
6e70227d | 1536 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1537 | struct dwarf2_cu *); |
1538 | ||
bf6af496 | 1539 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1540 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1541 | struct die_info *); |
639d11d3 | 1542 | |
dee91e82 | 1543 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1544 | const gdb_byte *info_ptr, |
1545 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1546 | struct die_info *parent); |
1547 | ||
d521ce57 TT |
1548 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1549 | struct die_info **, const gdb_byte *, | |
1550 | int *, int); | |
3019eac3 | 1551 | |
d521ce57 TT |
1552 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1553 | struct die_info **, const gdb_byte *, | |
1554 | int *); | |
93311388 | 1555 | |
e7c27a73 | 1556 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1557 | |
15d034d0 TT |
1558 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1559 | struct obstack *); | |
71c25dea | 1560 | |
15d034d0 | 1561 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1562 | |
15d034d0 | 1563 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1564 | struct die_info *die, |
1565 | struct dwarf2_cu *cu); | |
1566 | ||
ca69b9e6 DE |
1567 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1568 | struct dwarf2_cu *cu); | |
1569 | ||
e142c38c | 1570 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1571 | struct dwarf2_cu **); |
9219021c | 1572 | |
f39c6ffd | 1573 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1574 | |
f39c6ffd | 1575 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1576 | |
f39c6ffd | 1577 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1578 | |
a14ed312 | 1579 | static char *dwarf_bool_name (unsigned int); |
c906108c | 1580 | |
f39c6ffd | 1581 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1582 | |
f9aca02d | 1583 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1584 | |
d97bc12b DE |
1585 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1586 | ||
1587 | static void dump_die_for_error (struct die_info *); | |
1588 | ||
1589 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1590 | struct die_info *); | |
c906108c | 1591 | |
d97bc12b | 1592 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1593 | |
51545339 | 1594 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1595 | struct dwarf2_cu *); |
c906108c | 1596 | |
93311388 DE |
1597 | static int is_ref_attr (struct attribute *); |
1598 | ||
b64f50a1 | 1599 | static sect_offset dwarf2_get_ref_die_offset (struct attribute *); |
c906108c | 1600 | |
43bbcdc2 | 1601 | static LONGEST dwarf2_get_attr_constant_value (struct attribute *, int); |
a02abb62 | 1602 | |
348e048f DE |
1603 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
1604 | struct attribute *, | |
1605 | struct dwarf2_cu **); | |
1606 | ||
10b3939b DJ |
1607 | static struct die_info *follow_die_ref (struct die_info *, |
1608 | struct attribute *, | |
f2f0e013 | 1609 | struct dwarf2_cu **); |
c906108c | 1610 | |
348e048f DE |
1611 | static struct die_info *follow_die_sig (struct die_info *, |
1612 | struct attribute *, | |
1613 | struct dwarf2_cu **); | |
1614 | ||
ac9ec31b DE |
1615 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1616 | struct dwarf2_cu *); | |
1617 | ||
1618 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
1619 | struct attribute *, | |
1620 | struct dwarf2_cu *); | |
1621 | ||
e5fe5e75 | 1622 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1623 | |
52dc124a | 1624 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1625 | |
f4dc4d17 | 1626 | static struct type_unit_group *get_type_unit_group |
094b34ac | 1627 | (struct dwarf2_cu *, struct attribute *); |
f4dc4d17 DE |
1628 | |
1629 | static void build_type_unit_groups (die_reader_func_ftype *, void *); | |
1630 | ||
c906108c SS |
1631 | /* memory allocation interface */ |
1632 | ||
7b5a2f43 | 1633 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1634 | |
b60c80d6 | 1635 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1636 | |
09262596 | 1637 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, |
15d034d0 | 1638 | const char *, int); |
2e276125 | 1639 | |
8e19ed76 PS |
1640 | static int attr_form_is_block (struct attribute *); |
1641 | ||
3690dd37 JB |
1642 | static int attr_form_is_section_offset (struct attribute *); |
1643 | ||
1644 | static int attr_form_is_constant (struct attribute *); | |
1645 | ||
8cf6f0b1 TT |
1646 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1647 | struct dwarf2_loclist_baton *baton, | |
1648 | struct attribute *attr); | |
1649 | ||
93e7bd98 DJ |
1650 | static void dwarf2_symbol_mark_computed (struct attribute *attr, |
1651 | struct symbol *sym, | |
f1e6e072 TT |
1652 | struct dwarf2_cu *cu, |
1653 | int is_block); | |
4c2df51b | 1654 | |
d521ce57 TT |
1655 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1656 | const gdb_byte *info_ptr, | |
1657 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1658 | |
72bf9492 DJ |
1659 | static void free_stack_comp_unit (void *); |
1660 | ||
72bf9492 DJ |
1661 | static hashval_t partial_die_hash (const void *item); |
1662 | ||
1663 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1664 | ||
ae038cb0 | 1665 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
36586728 | 1666 | (sect_offset offset, unsigned int offset_in_dwz, struct objfile *objfile); |
ae038cb0 | 1667 | |
9816fde3 | 1668 | static void init_one_comp_unit (struct dwarf2_cu *cu, |
23745b47 | 1669 | struct dwarf2_per_cu_data *per_cu); |
9816fde3 JK |
1670 | |
1671 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, | |
95554aad TT |
1672 | struct die_info *comp_unit_die, |
1673 | enum language pretend_language); | |
93311388 | 1674 | |
68dc6402 | 1675 | static void free_heap_comp_unit (void *); |
ae038cb0 DJ |
1676 | |
1677 | static void free_cached_comp_units (void *); | |
1678 | ||
1679 | static void age_cached_comp_units (void); | |
1680 | ||
dee91e82 | 1681 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1682 | |
f792889a DJ |
1683 | static struct type *set_die_type (struct die_info *, struct type *, |
1684 | struct dwarf2_cu *); | |
1c379e20 | 1685 | |
ae038cb0 DJ |
1686 | static void create_all_comp_units (struct objfile *); |
1687 | ||
0e50663e | 1688 | static int create_all_type_units (struct objfile *); |
1fd400ff | 1689 | |
95554aad TT |
1690 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, |
1691 | enum language); | |
10b3939b | 1692 | |
95554aad TT |
1693 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1694 | enum language); | |
10b3939b | 1695 | |
f4dc4d17 DE |
1696 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1697 | enum language); | |
1698 | ||
10b3939b DJ |
1699 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1700 | struct dwarf2_per_cu_data *); | |
1701 | ||
ae038cb0 DJ |
1702 | static void dwarf2_mark (struct dwarf2_cu *); |
1703 | ||
1704 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1705 | ||
b64f50a1 | 1706 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1707 | struct dwarf2_per_cu_data *); |
673bfd45 | 1708 | |
f792889a | 1709 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1710 | |
9291a0cd TT |
1711 | static void dwarf2_release_queue (void *dummy); |
1712 | ||
95554aad TT |
1713 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1714 | enum language pretend_language); | |
1715 | ||
1716 | static int maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
1717 | struct dwarf2_per_cu_data *per_cu, | |
1718 | enum language pretend_language); | |
9291a0cd | 1719 | |
a0f42c21 | 1720 | static void process_queue (void); |
9291a0cd TT |
1721 | |
1722 | static void find_file_and_directory (struct die_info *die, | |
1723 | struct dwarf2_cu *cu, | |
15d034d0 | 1724 | const char **name, const char **comp_dir); |
9291a0cd TT |
1725 | |
1726 | static char *file_full_name (int file, struct line_header *lh, | |
1727 | const char *comp_dir); | |
1728 | ||
d521ce57 | 1729 | static const gdb_byte *read_and_check_comp_unit_head |
36586728 TT |
1730 | (struct comp_unit_head *header, |
1731 | struct dwarf2_section_info *section, | |
d521ce57 | 1732 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
36586728 TT |
1733 | int is_debug_types_section); |
1734 | ||
fd820528 | 1735 | static void init_cutu_and_read_dies |
f4dc4d17 DE |
1736 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
1737 | int use_existing_cu, int keep, | |
3019eac3 DE |
1738 | die_reader_func_ftype *die_reader_func, void *data); |
1739 | ||
dee91e82 DE |
1740 | static void init_cutu_and_read_dies_simple |
1741 | (struct dwarf2_per_cu_data *this_cu, | |
1742 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1743 | |
673bfd45 | 1744 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1745 | |
3019eac3 DE |
1746 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1747 | ||
1748 | static struct dwo_unit *lookup_dwo_comp_unit | |
a1855c1d | 1749 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1750 | |
1751 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1752 | (struct signatured_type *, const char *, const char *); |
3019eac3 DE |
1753 | |
1754 | static void free_dwo_file_cleanup (void *); | |
1755 | ||
95554aad TT |
1756 | static void process_cu_includes (void); |
1757 | ||
1b80a9fa JK |
1758 | static void check_producer (struct dwarf2_cu *cu); |
1759 | ||
9291a0cd TT |
1760 | #if WORDS_BIGENDIAN |
1761 | ||
1762 | /* Convert VALUE between big- and little-endian. */ | |
1763 | static offset_type | |
1764 | byte_swap (offset_type value) | |
1765 | { | |
1766 | offset_type result; | |
1767 | ||
1768 | result = (value & 0xff) << 24; | |
1769 | result |= (value & 0xff00) << 8; | |
1770 | result |= (value & 0xff0000) >> 8; | |
1771 | result |= (value & 0xff000000) >> 24; | |
1772 | return result; | |
1773 | } | |
1774 | ||
1775 | #define MAYBE_SWAP(V) byte_swap (V) | |
1776 | ||
1777 | #else | |
1778 | #define MAYBE_SWAP(V) (V) | |
1779 | #endif /* WORDS_BIGENDIAN */ | |
1780 | ||
1781 | /* The suffix for an index file. */ | |
1782 | #define INDEX_SUFFIX ".gdb-index" | |
1783 | ||
c906108c | 1784 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1785 | information and return true if we have enough to do something. |
1786 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
1787 | ELF names are used. */ | |
c906108c SS |
1788 | |
1789 | int | |
251d32d9 TG |
1790 | dwarf2_has_info (struct objfile *objfile, |
1791 | const struct dwarf2_debug_sections *names) | |
c906108c | 1792 | { |
be391dca TT |
1793 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); |
1794 | if (!dwarf2_per_objfile) | |
1795 | { | |
1796 | /* Initialize per-objfile state. */ | |
1797 | struct dwarf2_per_objfile *data | |
1798 | = obstack_alloc (&objfile->objfile_obstack, sizeof (*data)); | |
9a619af0 | 1799 | |
be391dca TT |
1800 | memset (data, 0, sizeof (*data)); |
1801 | set_objfile_data (objfile, dwarf2_objfile_data_key, data); | |
1802 | dwarf2_per_objfile = data; | |
6502dd73 | 1803 | |
251d32d9 TG |
1804 | bfd_map_over_sections (objfile->obfd, dwarf2_locate_sections, |
1805 | (void *) names); | |
be391dca TT |
1806 | dwarf2_per_objfile->objfile = objfile; |
1807 | } | |
1808 | return (dwarf2_per_objfile->info.asection != NULL | |
1809 | && dwarf2_per_objfile->abbrev.asection != NULL); | |
c906108c SS |
1810 | } |
1811 | ||
251d32d9 TG |
1812 | /* When loading sections, we look either for uncompressed section or for |
1813 | compressed section names. */ | |
233a11ab CS |
1814 | |
1815 | static int | |
251d32d9 TG |
1816 | section_is_p (const char *section_name, |
1817 | const struct dwarf2_section_names *names) | |
233a11ab | 1818 | { |
251d32d9 TG |
1819 | if (names->normal != NULL |
1820 | && strcmp (section_name, names->normal) == 0) | |
1821 | return 1; | |
1822 | if (names->compressed != NULL | |
1823 | && strcmp (section_name, names->compressed) == 0) | |
1824 | return 1; | |
1825 | return 0; | |
233a11ab CS |
1826 | } |
1827 | ||
c906108c SS |
1828 | /* This function is mapped across the sections and remembers the |
1829 | offset and size of each of the debugging sections we are interested | |
1830 | in. */ | |
1831 | ||
1832 | static void | |
251d32d9 | 1833 | dwarf2_locate_sections (bfd *abfd, asection *sectp, void *vnames) |
c906108c | 1834 | { |
251d32d9 | 1835 | const struct dwarf2_debug_sections *names; |
dc7650b8 | 1836 | flagword aflag = bfd_get_section_flags (abfd, sectp); |
251d32d9 TG |
1837 | |
1838 | if (vnames == NULL) | |
1839 | names = &dwarf2_elf_names; | |
1840 | else | |
1841 | names = (const struct dwarf2_debug_sections *) vnames; | |
1842 | ||
dc7650b8 JK |
1843 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1844 | { | |
1845 | } | |
1846 | else if (section_is_p (sectp->name, &names->info)) | |
c906108c | 1847 | { |
dce234bc PP |
1848 | dwarf2_per_objfile->info.asection = sectp; |
1849 | dwarf2_per_objfile->info.size = bfd_get_section_size (sectp); | |
c906108c | 1850 | } |
251d32d9 | 1851 | else if (section_is_p (sectp->name, &names->abbrev)) |
c906108c | 1852 | { |
dce234bc PP |
1853 | dwarf2_per_objfile->abbrev.asection = sectp; |
1854 | dwarf2_per_objfile->abbrev.size = bfd_get_section_size (sectp); | |
c906108c | 1855 | } |
251d32d9 | 1856 | else if (section_is_p (sectp->name, &names->line)) |
c906108c | 1857 | { |
dce234bc PP |
1858 | dwarf2_per_objfile->line.asection = sectp; |
1859 | dwarf2_per_objfile->line.size = bfd_get_section_size (sectp); | |
c906108c | 1860 | } |
251d32d9 | 1861 | else if (section_is_p (sectp->name, &names->loc)) |
c906108c | 1862 | { |
dce234bc PP |
1863 | dwarf2_per_objfile->loc.asection = sectp; |
1864 | dwarf2_per_objfile->loc.size = bfd_get_section_size (sectp); | |
c906108c | 1865 | } |
251d32d9 | 1866 | else if (section_is_p (sectp->name, &names->macinfo)) |
c906108c | 1867 | { |
dce234bc PP |
1868 | dwarf2_per_objfile->macinfo.asection = sectp; |
1869 | dwarf2_per_objfile->macinfo.size = bfd_get_section_size (sectp); | |
c906108c | 1870 | } |
cf2c3c16 TT |
1871 | else if (section_is_p (sectp->name, &names->macro)) |
1872 | { | |
1873 | dwarf2_per_objfile->macro.asection = sectp; | |
1874 | dwarf2_per_objfile->macro.size = bfd_get_section_size (sectp); | |
1875 | } | |
251d32d9 | 1876 | else if (section_is_p (sectp->name, &names->str)) |
c906108c | 1877 | { |
dce234bc PP |
1878 | dwarf2_per_objfile->str.asection = sectp; |
1879 | dwarf2_per_objfile->str.size = bfd_get_section_size (sectp); | |
c906108c | 1880 | } |
3019eac3 DE |
1881 | else if (section_is_p (sectp->name, &names->addr)) |
1882 | { | |
1883 | dwarf2_per_objfile->addr.asection = sectp; | |
1884 | dwarf2_per_objfile->addr.size = bfd_get_section_size (sectp); | |
1885 | } | |
251d32d9 | 1886 | else if (section_is_p (sectp->name, &names->frame)) |
b6af0555 | 1887 | { |
dce234bc PP |
1888 | dwarf2_per_objfile->frame.asection = sectp; |
1889 | dwarf2_per_objfile->frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1890 | } |
251d32d9 | 1891 | else if (section_is_p (sectp->name, &names->eh_frame)) |
b6af0555 | 1892 | { |
dc7650b8 JK |
1893 | dwarf2_per_objfile->eh_frame.asection = sectp; |
1894 | dwarf2_per_objfile->eh_frame.size = bfd_get_section_size (sectp); | |
b6af0555 | 1895 | } |
251d32d9 | 1896 | else if (section_is_p (sectp->name, &names->ranges)) |
af34e669 | 1897 | { |
dce234bc PP |
1898 | dwarf2_per_objfile->ranges.asection = sectp; |
1899 | dwarf2_per_objfile->ranges.size = bfd_get_section_size (sectp); | |
af34e669 | 1900 | } |
251d32d9 | 1901 | else if (section_is_p (sectp->name, &names->types)) |
348e048f | 1902 | { |
8b70b953 TT |
1903 | struct dwarf2_section_info type_section; |
1904 | ||
1905 | memset (&type_section, 0, sizeof (type_section)); | |
1906 | type_section.asection = sectp; | |
1907 | type_section.size = bfd_get_section_size (sectp); | |
1908 | ||
1909 | VEC_safe_push (dwarf2_section_info_def, dwarf2_per_objfile->types, | |
1910 | &type_section); | |
348e048f | 1911 | } |
251d32d9 | 1912 | else if (section_is_p (sectp->name, &names->gdb_index)) |
9291a0cd TT |
1913 | { |
1914 | dwarf2_per_objfile->gdb_index.asection = sectp; | |
1915 | dwarf2_per_objfile->gdb_index.size = bfd_get_section_size (sectp); | |
1916 | } | |
dce234bc | 1917 | |
72dca2f5 FR |
1918 | if ((bfd_get_section_flags (abfd, sectp) & SEC_LOAD) |
1919 | && bfd_section_vma (abfd, sectp) == 0) | |
1920 | dwarf2_per_objfile->has_section_at_zero = 1; | |
c906108c SS |
1921 | } |
1922 | ||
fceca515 DE |
1923 | /* A helper function that decides whether a section is empty, |
1924 | or not present. */ | |
9e0ac564 TT |
1925 | |
1926 | static int | |
1927 | dwarf2_section_empty_p (struct dwarf2_section_info *info) | |
1928 | { | |
1929 | return info->asection == NULL || info->size == 0; | |
1930 | } | |
1931 | ||
3019eac3 DE |
1932 | /* Read the contents of the section INFO. |
1933 | OBJFILE is the main object file, but not necessarily the file where | |
1934 | the section comes from. E.g., for DWO files INFO->asection->owner | |
1935 | is the bfd of the DWO file. | |
dce234bc | 1936 | If the section is compressed, uncompress it before returning. */ |
c906108c | 1937 | |
dce234bc PP |
1938 | static void |
1939 | dwarf2_read_section (struct objfile *objfile, struct dwarf2_section_info *info) | |
c906108c | 1940 | { |
dce234bc | 1941 | asection *sectp = info->asection; |
3019eac3 | 1942 | bfd *abfd; |
dce234bc PP |
1943 | gdb_byte *buf, *retbuf; |
1944 | unsigned char header[4]; | |
c906108c | 1945 | |
be391dca TT |
1946 | if (info->readin) |
1947 | return; | |
dce234bc | 1948 | info->buffer = NULL; |
be391dca | 1949 | info->readin = 1; |
188dd5d6 | 1950 | |
9e0ac564 | 1951 | if (dwarf2_section_empty_p (info)) |
dce234bc | 1952 | return; |
c906108c | 1953 | |
3019eac3 DE |
1954 | abfd = sectp->owner; |
1955 | ||
4bf44c1c TT |
1956 | /* If the section has relocations, we must read it ourselves. |
1957 | Otherwise we attach it to the BFD. */ | |
1958 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 1959 | { |
d521ce57 | 1960 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 1961 | return; |
dce234bc | 1962 | } |
dce234bc | 1963 | |
4bf44c1c TT |
1964 | buf = obstack_alloc (&objfile->objfile_obstack, info->size); |
1965 | info->buffer = buf; | |
dce234bc PP |
1966 | |
1967 | /* When debugging .o files, we may need to apply relocations; see | |
1968 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
1969 | We never compress sections in .o files, so we only need to | |
1970 | try this when the section is not compressed. */ | |
ac8035ab | 1971 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
1972 | if (retbuf != NULL) |
1973 | { | |
1974 | info->buffer = retbuf; | |
1975 | return; | |
1976 | } | |
1977 | ||
1978 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 | |
1979 | || bfd_bread (buf, info->size, abfd) != info->size) | |
1980 | error (_("Dwarf Error: Can't read DWARF data from '%s'"), | |
1981 | bfd_get_filename (abfd)); | |
1982 | } | |
1983 | ||
9e0ac564 TT |
1984 | /* A helper function that returns the size of a section in a safe way. |
1985 | If you are positive that the section has been read before using the | |
1986 | size, then it is safe to refer to the dwarf2_section_info object's | |
1987 | "size" field directly. In other cases, you must call this | |
1988 | function, because for compressed sections the size field is not set | |
1989 | correctly until the section has been read. */ | |
1990 | ||
1991 | static bfd_size_type | |
1992 | dwarf2_section_size (struct objfile *objfile, | |
1993 | struct dwarf2_section_info *info) | |
1994 | { | |
1995 | if (!info->readin) | |
1996 | dwarf2_read_section (objfile, info); | |
1997 | return info->size; | |
1998 | } | |
1999 | ||
dce234bc | 2000 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2001 | SECTION_NAME. */ |
af34e669 | 2002 | |
dce234bc | 2003 | void |
3017a003 TG |
2004 | dwarf2_get_section_info (struct objfile *objfile, |
2005 | enum dwarf2_section_enum sect, | |
d521ce57 | 2006 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2007 | bfd_size_type *sizep) |
2008 | { | |
2009 | struct dwarf2_per_objfile *data | |
2010 | = objfile_data (objfile, dwarf2_objfile_data_key); | |
2011 | struct dwarf2_section_info *info; | |
a3b2a86b TT |
2012 | |
2013 | /* We may see an objfile without any DWARF, in which case we just | |
2014 | return nothing. */ | |
2015 | if (data == NULL) | |
2016 | { | |
2017 | *sectp = NULL; | |
2018 | *bufp = NULL; | |
2019 | *sizep = 0; | |
2020 | return; | |
2021 | } | |
3017a003 TG |
2022 | switch (sect) |
2023 | { | |
2024 | case DWARF2_DEBUG_FRAME: | |
2025 | info = &data->frame; | |
2026 | break; | |
2027 | case DWARF2_EH_FRAME: | |
2028 | info = &data->eh_frame; | |
2029 | break; | |
2030 | default: | |
2031 | gdb_assert_not_reached ("unexpected section"); | |
2032 | } | |
dce234bc | 2033 | |
9e0ac564 | 2034 | dwarf2_read_section (objfile, info); |
dce234bc PP |
2035 | |
2036 | *sectp = info->asection; | |
2037 | *bufp = info->buffer; | |
2038 | *sizep = info->size; | |
2039 | } | |
2040 | ||
36586728 TT |
2041 | /* A helper function to find the sections for a .dwz file. */ |
2042 | ||
2043 | static void | |
2044 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2045 | { | |
2046 | struct dwz_file *dwz_file = arg; | |
2047 | ||
2048 | /* Note that we only support the standard ELF names, because .dwz | |
2049 | is ELF-only (at the time of writing). */ | |
2050 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2051 | { | |
2052 | dwz_file->abbrev.asection = sectp; | |
2053 | dwz_file->abbrev.size = bfd_get_section_size (sectp); | |
2054 | } | |
2055 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2056 | { | |
2057 | dwz_file->info.asection = sectp; | |
2058 | dwz_file->info.size = bfd_get_section_size (sectp); | |
2059 | } | |
2060 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2061 | { | |
2062 | dwz_file->str.asection = sectp; | |
2063 | dwz_file->str.size = bfd_get_section_size (sectp); | |
2064 | } | |
2065 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2066 | { | |
2067 | dwz_file->line.asection = sectp; | |
2068 | dwz_file->line.size = bfd_get_section_size (sectp); | |
2069 | } | |
2070 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2071 | { | |
2072 | dwz_file->macro.asection = sectp; | |
2073 | dwz_file->macro.size = bfd_get_section_size (sectp); | |
2074 | } | |
2ec9a5e0 TT |
2075 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2076 | { | |
2077 | dwz_file->gdb_index.asection = sectp; | |
2078 | dwz_file->gdb_index.size = bfd_get_section_size (sectp); | |
2079 | } | |
36586728 TT |
2080 | } |
2081 | ||
2082 | /* Open the separate '.dwz' debug file, if needed. Error if the file | |
2083 | cannot be found. */ | |
2084 | ||
2085 | static struct dwz_file * | |
2086 | dwarf2_get_dwz_file (void) | |
2087 | { | |
2088 | bfd *abfd, *dwz_bfd; | |
2089 | asection *section; | |
2090 | gdb_byte *data; | |
2091 | struct cleanup *cleanup; | |
2092 | const char *filename; | |
2093 | struct dwz_file *result; | |
2094 | ||
2095 | if (dwarf2_per_objfile->dwz_file != NULL) | |
2096 | return dwarf2_per_objfile->dwz_file; | |
2097 | ||
2098 | abfd = dwarf2_per_objfile->objfile->obfd; | |
2099 | section = bfd_get_section_by_name (abfd, ".gnu_debugaltlink"); | |
2100 | if (section == NULL) | |
2101 | error (_("could not find '.gnu_debugaltlink' section")); | |
2102 | if (!bfd_malloc_and_get_section (abfd, section, &data)) | |
2103 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2104 | bfd_errmsg (bfd_get_error ())); | |
2105 | cleanup = make_cleanup (xfree, data); | |
2106 | ||
f9d83a0b | 2107 | filename = (const char *) data; |
36586728 TT |
2108 | if (!IS_ABSOLUTE_PATH (filename)) |
2109 | { | |
2110 | char *abs = gdb_realpath (dwarf2_per_objfile->objfile->name); | |
2111 | char *rel; | |
2112 | ||
2113 | make_cleanup (xfree, abs); | |
2114 | abs = ldirname (abs); | |
2115 | make_cleanup (xfree, abs); | |
2116 | ||
2117 | rel = concat (abs, SLASH_STRING, filename, (char *) NULL); | |
2118 | make_cleanup (xfree, rel); | |
2119 | filename = rel; | |
2120 | } | |
2121 | ||
2122 | /* The format is just a NUL-terminated file name, followed by the | |
2123 | build-id. For now, though, we ignore the build-id. */ | |
2124 | dwz_bfd = gdb_bfd_open (filename, gnutarget, -1); | |
2125 | if (dwz_bfd == NULL) | |
2126 | error (_("could not read '%s': %s"), filename, | |
2127 | bfd_errmsg (bfd_get_error ())); | |
2128 | ||
2129 | if (!bfd_check_format (dwz_bfd, bfd_object)) | |
2130 | { | |
2131 | gdb_bfd_unref (dwz_bfd); | |
2132 | error (_("file '%s' was not usable: %s"), filename, | |
2133 | bfd_errmsg (bfd_get_error ())); | |
2134 | } | |
2135 | ||
2136 | result = OBSTACK_ZALLOC (&dwarf2_per_objfile->objfile->objfile_obstack, | |
2137 | struct dwz_file); | |
2138 | result->dwz_bfd = dwz_bfd; | |
2139 | ||
2140 | bfd_map_over_sections (dwz_bfd, locate_dwz_sections, result); | |
2141 | ||
2142 | do_cleanups (cleanup); | |
2143 | ||
8d2cc612 | 2144 | dwarf2_per_objfile->dwz_file = result; |
36586728 TT |
2145 | return result; |
2146 | } | |
9291a0cd | 2147 | \f |
7b9f3c50 DE |
2148 | /* DWARF quick_symbols_functions support. */ |
2149 | ||
2150 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2151 | unique line tables, so we maintain a separate table of all .debug_line | |
2152 | derived entries to support the sharing. | |
2153 | All the quick functions need is the list of file names. We discard the | |
2154 | line_header when we're done and don't need to record it here. */ | |
2155 | struct quick_file_names | |
2156 | { | |
094b34ac DE |
2157 | /* The data used to construct the hash key. */ |
2158 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2159 | |
2160 | /* The number of entries in file_names, real_names. */ | |
2161 | unsigned int num_file_names; | |
2162 | ||
2163 | /* The file names from the line table, after being run through | |
2164 | file_full_name. */ | |
2165 | const char **file_names; | |
2166 | ||
2167 | /* The file names from the line table after being run through | |
2168 | gdb_realpath. These are computed lazily. */ | |
2169 | const char **real_names; | |
2170 | }; | |
2171 | ||
2172 | /* When using the index (and thus not using psymtabs), each CU has an | |
2173 | object of this type. This is used to hold information needed by | |
2174 | the various "quick" methods. */ | |
2175 | struct dwarf2_per_cu_quick_data | |
2176 | { | |
2177 | /* The file table. This can be NULL if there was no file table | |
2178 | or it's currently not read in. | |
2179 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2180 | struct quick_file_names *file_names; | |
2181 | ||
2182 | /* The corresponding symbol table. This is NULL if symbols for this | |
2183 | CU have not yet been read. */ | |
2184 | struct symtab *symtab; | |
2185 | ||
2186 | /* A temporary mark bit used when iterating over all CUs in | |
2187 | expand_symtabs_matching. */ | |
2188 | unsigned int mark : 1; | |
2189 | ||
2190 | /* True if we've tried to read the file table and found there isn't one. | |
2191 | There will be no point in trying to read it again next time. */ | |
2192 | unsigned int no_file_data : 1; | |
2193 | }; | |
2194 | ||
094b34ac DE |
2195 | /* Utility hash function for a stmt_list_hash. */ |
2196 | ||
2197 | static hashval_t | |
2198 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2199 | { | |
2200 | hashval_t v = 0; | |
2201 | ||
2202 | if (stmt_list_hash->dwo_unit != NULL) | |
2203 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
2204 | v += stmt_list_hash->line_offset.sect_off; | |
2205 | return v; | |
2206 | } | |
2207 | ||
2208 | /* Utility equality function for a stmt_list_hash. */ | |
2209 | ||
2210 | static int | |
2211 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2212 | const struct stmt_list_hash *rhs) | |
2213 | { | |
2214 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2215 | return 0; | |
2216 | if (lhs->dwo_unit != NULL | |
2217 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2218 | return 0; | |
2219 | ||
2220 | return lhs->line_offset.sect_off == rhs->line_offset.sect_off; | |
2221 | } | |
2222 | ||
7b9f3c50 DE |
2223 | /* Hash function for a quick_file_names. */ |
2224 | ||
2225 | static hashval_t | |
2226 | hash_file_name_entry (const void *e) | |
2227 | { | |
2228 | const struct quick_file_names *file_data = e; | |
2229 | ||
094b34ac | 2230 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2231 | } |
2232 | ||
2233 | /* Equality function for a quick_file_names. */ | |
2234 | ||
2235 | static int | |
2236 | eq_file_name_entry (const void *a, const void *b) | |
2237 | { | |
2238 | const struct quick_file_names *ea = a; | |
2239 | const struct quick_file_names *eb = b; | |
2240 | ||
094b34ac | 2241 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2242 | } |
2243 | ||
2244 | /* Delete function for a quick_file_names. */ | |
2245 | ||
2246 | static void | |
2247 | delete_file_name_entry (void *e) | |
2248 | { | |
2249 | struct quick_file_names *file_data = e; | |
2250 | int i; | |
2251 | ||
2252 | for (i = 0; i < file_data->num_file_names; ++i) | |
2253 | { | |
2254 | xfree ((void*) file_data->file_names[i]); | |
2255 | if (file_data->real_names) | |
2256 | xfree ((void*) file_data->real_names[i]); | |
2257 | } | |
2258 | ||
2259 | /* The space for the struct itself lives on objfile_obstack, | |
2260 | so we don't free it here. */ | |
2261 | } | |
2262 | ||
2263 | /* Create a quick_file_names hash table. */ | |
2264 | ||
2265 | static htab_t | |
2266 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2267 | { | |
2268 | return htab_create_alloc (nr_initial_entries, | |
2269 | hash_file_name_entry, eq_file_name_entry, | |
2270 | delete_file_name_entry, xcalloc, xfree); | |
2271 | } | |
9291a0cd | 2272 | |
918dd910 JK |
2273 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2274 | have to be created afterwards. You should call age_cached_comp_units after | |
2275 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2276 | ||
2277 | static void | |
2278 | load_cu (struct dwarf2_per_cu_data *per_cu) | |
2279 | { | |
3019eac3 | 2280 | if (per_cu->is_debug_types) |
e5fe5e75 | 2281 | load_full_type_unit (per_cu); |
918dd910 | 2282 | else |
95554aad | 2283 | load_full_comp_unit (per_cu, language_minimal); |
918dd910 | 2284 | |
918dd910 | 2285 | gdb_assert (per_cu->cu != NULL); |
2dc860c0 DE |
2286 | |
2287 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2288 | } |
2289 | ||
a0f42c21 | 2290 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2291 | |
9291a0cd | 2292 | static void |
a0f42c21 | 2293 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd TT |
2294 | { |
2295 | struct cleanup *back_to; | |
2296 | ||
f4dc4d17 DE |
2297 | /* Skip type_unit_groups, reading the type units they contain |
2298 | is handled elsewhere. */ | |
2299 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2300 | return; | |
2301 | ||
9291a0cd TT |
2302 | back_to = make_cleanup (dwarf2_release_queue, NULL); |
2303 | ||
95554aad TT |
2304 | if (dwarf2_per_objfile->using_index |
2305 | ? per_cu->v.quick->symtab == NULL | |
2306 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) | |
2307 | { | |
2308 | queue_comp_unit (per_cu, language_minimal); | |
2309 | load_cu (per_cu); | |
2310 | } | |
9291a0cd | 2311 | |
a0f42c21 | 2312 | process_queue (); |
9291a0cd TT |
2313 | |
2314 | /* Age the cache, releasing compilation units that have not | |
2315 | been used recently. */ | |
2316 | age_cached_comp_units (); | |
2317 | ||
2318 | do_cleanups (back_to); | |
2319 | } | |
2320 | ||
2321 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2322 | the objfile from which this CU came. Returns the resulting symbol | |
2323 | table. */ | |
2fdf6df6 | 2324 | |
9291a0cd | 2325 | static struct symtab * |
a0f42c21 | 2326 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu) |
9291a0cd | 2327 | { |
95554aad | 2328 | gdb_assert (dwarf2_per_objfile->using_index); |
9291a0cd TT |
2329 | if (!per_cu->v.quick->symtab) |
2330 | { | |
2331 | struct cleanup *back_to = make_cleanup (free_cached_comp_units, NULL); | |
2332 | increment_reading_symtab (); | |
a0f42c21 | 2333 | dw2_do_instantiate_symtab (per_cu); |
95554aad | 2334 | process_cu_includes (); |
9291a0cd TT |
2335 | do_cleanups (back_to); |
2336 | } | |
2337 | return per_cu->v.quick->symtab; | |
2338 | } | |
2339 | ||
f4dc4d17 DE |
2340 | /* Return the CU given its index. |
2341 | ||
2342 | This is intended for loops like: | |
2343 | ||
2344 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2345 | + dwarf2_per_objfile->n_type_units); ++i) | |
2346 | { | |
2347 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
2348 | ||
2349 | ...; | |
2350 | } | |
2351 | */ | |
2fdf6df6 | 2352 | |
1fd400ff TT |
2353 | static struct dwarf2_per_cu_data * |
2354 | dw2_get_cu (int index) | |
2355 | { | |
2356 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2357 | { | |
f4dc4d17 | 2358 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2359 | gdb_assert (index < dwarf2_per_objfile->n_type_units); |
2360 | return &dwarf2_per_objfile->all_type_units[index]->per_cu; | |
f4dc4d17 DE |
2361 | } |
2362 | ||
2363 | return dwarf2_per_objfile->all_comp_units[index]; | |
2364 | } | |
2365 | ||
2366 | /* Return the primary CU given its index. | |
2367 | The difference between this function and dw2_get_cu is in the handling | |
2368 | of type units (TUs). Here we return the type_unit_group object. | |
2369 | ||
2370 | This is intended for loops like: | |
2371 | ||
2372 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
2373 | + dwarf2_per_objfile->n_type_unit_groups); ++i) | |
2374 | { | |
2375 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); | |
2376 | ||
2377 | ...; | |
2378 | } | |
2379 | */ | |
2380 | ||
2381 | static struct dwarf2_per_cu_data * | |
2382 | dw2_get_primary_cu (int index) | |
2383 | { | |
2384 | if (index >= dwarf2_per_objfile->n_comp_units) | |
2385 | { | |
1fd400ff | 2386 | index -= dwarf2_per_objfile->n_comp_units; |
094b34ac DE |
2387 | gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups); |
2388 | return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu; | |
1fd400ff | 2389 | } |
f4dc4d17 | 2390 | |
1fd400ff TT |
2391 | return dwarf2_per_objfile->all_comp_units[index]; |
2392 | } | |
2393 | ||
2ec9a5e0 TT |
2394 | /* A helper for create_cus_from_index that handles a given list of |
2395 | CUs. */ | |
2fdf6df6 | 2396 | |
74a0d9f6 | 2397 | static void |
2ec9a5e0 TT |
2398 | create_cus_from_index_list (struct objfile *objfile, |
2399 | const gdb_byte *cu_list, offset_type n_elements, | |
2400 | struct dwarf2_section_info *section, | |
2401 | int is_dwz, | |
2402 | int base_offset) | |
9291a0cd TT |
2403 | { |
2404 | offset_type i; | |
9291a0cd | 2405 | |
2ec9a5e0 | 2406 | for (i = 0; i < n_elements; i += 2) |
9291a0cd TT |
2407 | { |
2408 | struct dwarf2_per_cu_data *the_cu; | |
2409 | ULONGEST offset, length; | |
2410 | ||
74a0d9f6 JK |
2411 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2412 | offset = extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2413 | length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2414 | cu_list += 2 * 8; |
2415 | ||
2416 | the_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2417 | struct dwarf2_per_cu_data); | |
b64f50a1 | 2418 | the_cu->offset.sect_off = offset; |
9291a0cd TT |
2419 | the_cu->length = length; |
2420 | the_cu->objfile = objfile; | |
8a0459fd | 2421 | the_cu->section = section; |
9291a0cd TT |
2422 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2423 | struct dwarf2_per_cu_quick_data); | |
2ec9a5e0 TT |
2424 | the_cu->is_dwz = is_dwz; |
2425 | dwarf2_per_objfile->all_comp_units[base_offset + i / 2] = the_cu; | |
9291a0cd | 2426 | } |
9291a0cd TT |
2427 | } |
2428 | ||
2ec9a5e0 | 2429 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2430 | the CU objects for this objfile. */ |
2ec9a5e0 | 2431 | |
74a0d9f6 | 2432 | static void |
2ec9a5e0 TT |
2433 | create_cus_from_index (struct objfile *objfile, |
2434 | const gdb_byte *cu_list, offset_type cu_list_elements, | |
2435 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2436 | { | |
2437 | struct dwz_file *dwz; | |
2438 | ||
2439 | dwarf2_per_objfile->n_comp_units = (cu_list_elements + dwz_elements) / 2; | |
2440 | dwarf2_per_objfile->all_comp_units | |
2441 | = obstack_alloc (&objfile->objfile_obstack, | |
2442 | dwarf2_per_objfile->n_comp_units | |
2443 | * sizeof (struct dwarf2_per_cu_data *)); | |
2444 | ||
74a0d9f6 JK |
2445 | create_cus_from_index_list (objfile, cu_list, cu_list_elements, |
2446 | &dwarf2_per_objfile->info, 0, 0); | |
2ec9a5e0 TT |
2447 | |
2448 | if (dwz_elements == 0) | |
74a0d9f6 | 2449 | return; |
2ec9a5e0 TT |
2450 | |
2451 | dwz = dwarf2_get_dwz_file (); | |
74a0d9f6 JK |
2452 | create_cus_from_index_list (objfile, dwz_list, dwz_elements, &dwz->info, 1, |
2453 | cu_list_elements / 2); | |
2ec9a5e0 TT |
2454 | } |
2455 | ||
1fd400ff | 2456 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2457 | |
74a0d9f6 | 2458 | static void |
673bfd45 | 2459 | create_signatured_type_table_from_index (struct objfile *objfile, |
8b70b953 | 2460 | struct dwarf2_section_info *section, |
673bfd45 DE |
2461 | const gdb_byte *bytes, |
2462 | offset_type elements) | |
1fd400ff TT |
2463 | { |
2464 | offset_type i; | |
673bfd45 | 2465 | htab_t sig_types_hash; |
1fd400ff | 2466 | |
d467dd73 DE |
2467 | dwarf2_per_objfile->n_type_units = elements / 3; |
2468 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 2469 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 2470 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 2471 | * sizeof (struct signatured_type *)); |
1fd400ff | 2472 | |
673bfd45 | 2473 | sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff TT |
2474 | |
2475 | for (i = 0; i < elements; i += 3) | |
2476 | { | |
52dc124a DE |
2477 | struct signatured_type *sig_type; |
2478 | ULONGEST offset, type_offset_in_tu, signature; | |
1fd400ff TT |
2479 | void **slot; |
2480 | ||
74a0d9f6 JK |
2481 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
2482 | offset = extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2483 | type_offset_in_tu = extract_unsigned_integer (bytes + 8, 8, | |
2484 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2485 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2486 | bytes += 3 * 8; | |
2487 | ||
52dc124a | 2488 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2489 | struct signatured_type); |
52dc124a | 2490 | sig_type->signature = signature; |
3019eac3 DE |
2491 | sig_type->type_offset_in_tu.cu_off = type_offset_in_tu; |
2492 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 2493 | sig_type->per_cu.section = section; |
52dc124a DE |
2494 | sig_type->per_cu.offset.sect_off = offset; |
2495 | sig_type->per_cu.objfile = objfile; | |
2496 | sig_type->per_cu.v.quick | |
1fd400ff TT |
2497 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2498 | struct dwarf2_per_cu_quick_data); | |
2499 | ||
52dc124a DE |
2500 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
2501 | *slot = sig_type; | |
1fd400ff | 2502 | |
b4dd5633 | 2503 | dwarf2_per_objfile->all_type_units[i / 3] = sig_type; |
1fd400ff TT |
2504 | } |
2505 | ||
673bfd45 | 2506 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
2507 | } |
2508 | ||
9291a0cd TT |
2509 | /* Read the address map data from the mapped index, and use it to |
2510 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2511 | |
9291a0cd TT |
2512 | static void |
2513 | create_addrmap_from_index (struct objfile *objfile, struct mapped_index *index) | |
2514 | { | |
2515 | const gdb_byte *iter, *end; | |
2516 | struct obstack temp_obstack; | |
2517 | struct addrmap *mutable_map; | |
2518 | struct cleanup *cleanup; | |
2519 | CORE_ADDR baseaddr; | |
2520 | ||
2521 | obstack_init (&temp_obstack); | |
2522 | cleanup = make_cleanup_obstack_free (&temp_obstack); | |
2523 | mutable_map = addrmap_create_mutable (&temp_obstack); | |
2524 | ||
2525 | iter = index->address_table; | |
2526 | end = iter + index->address_table_size; | |
2527 | ||
2528 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
2529 | ||
2530 | while (iter < end) | |
2531 | { | |
2532 | ULONGEST hi, lo, cu_index; | |
2533 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2534 | iter += 8; | |
2535 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2536 | iter += 8; | |
2537 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2538 | iter += 4; | |
f652bce2 DE |
2539 | |
2540 | if (cu_index < dwarf2_per_objfile->n_comp_units) | |
2541 | { | |
2542 | addrmap_set_empty (mutable_map, lo + baseaddr, hi + baseaddr - 1, | |
2543 | dw2_get_cu (cu_index)); | |
2544 | } | |
2545 | else | |
2546 | { | |
2547 | complaint (&symfile_complaints, | |
2548 | _(".gdb_index address table has invalid CU number %u"), | |
2549 | (unsigned) cu_index); | |
2550 | } | |
9291a0cd TT |
2551 | } |
2552 | ||
2553 | objfile->psymtabs_addrmap = addrmap_create_fixed (mutable_map, | |
2554 | &objfile->objfile_obstack); | |
2555 | do_cleanups (cleanup); | |
2556 | } | |
2557 | ||
59d7bcaf JK |
2558 | /* The hash function for strings in the mapped index. This is the same as |
2559 | SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the | |
2560 | implementation. This is necessary because the hash function is tied to the | |
2561 | format of the mapped index file. The hash values do not have to match with | |
559a7a62 JK |
2562 | SYMBOL_HASH_NEXT. |
2563 | ||
2564 | Use INT_MAX for INDEX_VERSION if you generate the current index format. */ | |
2fdf6df6 | 2565 | |
9291a0cd | 2566 | static hashval_t |
559a7a62 | 2567 | mapped_index_string_hash (int index_version, const void *p) |
9291a0cd TT |
2568 | { |
2569 | const unsigned char *str = (const unsigned char *) p; | |
2570 | hashval_t r = 0; | |
2571 | unsigned char c; | |
2572 | ||
2573 | while ((c = *str++) != 0) | |
559a7a62 JK |
2574 | { |
2575 | if (index_version >= 5) | |
2576 | c = tolower (c); | |
2577 | r = r * 67 + c - 113; | |
2578 | } | |
9291a0cd TT |
2579 | |
2580 | return r; | |
2581 | } | |
2582 | ||
2583 | /* Find a slot in the mapped index INDEX for the object named NAME. | |
2584 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
2585 | constant pool and return 1. If NAME cannot be found, return 0. */ | |
2fdf6df6 | 2586 | |
9291a0cd TT |
2587 | static int |
2588 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, | |
2589 | offset_type **vec_out) | |
2590 | { | |
0cf03b49 JK |
2591 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2592 | offset_type hash; | |
9291a0cd | 2593 | offset_type slot, step; |
559a7a62 | 2594 | int (*cmp) (const char *, const char *); |
9291a0cd | 2595 | |
0cf03b49 JK |
2596 | if (current_language->la_language == language_cplus |
2597 | || current_language->la_language == language_java | |
2598 | || current_language->la_language == language_fortran) | |
2599 | { | |
2600 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2601 | not contain any. */ | |
2602 | const char *paren = strchr (name, '('); | |
2603 | ||
2604 | if (paren) | |
2605 | { | |
2606 | char *dup; | |
2607 | ||
2608 | dup = xmalloc (paren - name + 1); | |
2609 | memcpy (dup, name, paren - name); | |
2610 | dup[paren - name] = 0; | |
2611 | ||
2612 | make_cleanup (xfree, dup); | |
2613 | name = dup; | |
2614 | } | |
2615 | } | |
2616 | ||
559a7a62 | 2617 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2618 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2619 | simulate our NAME being searched is also lowercased. */ |
2620 | hash = mapped_index_string_hash ((index->version == 4 | |
2621 | && case_sensitivity == case_sensitive_off | |
2622 | ? 5 : index->version), | |
2623 | name); | |
2624 | ||
3876f04e DE |
2625 | slot = hash & (index->symbol_table_slots - 1); |
2626 | step = ((hash * 17) & (index->symbol_table_slots - 1)) | 1; | |
559a7a62 | 2627 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2628 | |
2629 | for (;;) | |
2630 | { | |
2631 | /* Convert a slot number to an offset into the table. */ | |
2632 | offset_type i = 2 * slot; | |
2633 | const char *str; | |
3876f04e | 2634 | if (index->symbol_table[i] == 0 && index->symbol_table[i + 1] == 0) |
0cf03b49 JK |
2635 | { |
2636 | do_cleanups (back_to); | |
2637 | return 0; | |
2638 | } | |
9291a0cd | 2639 | |
3876f04e | 2640 | str = index->constant_pool + MAYBE_SWAP (index->symbol_table[i]); |
559a7a62 | 2641 | if (!cmp (name, str)) |
9291a0cd TT |
2642 | { |
2643 | *vec_out = (offset_type *) (index->constant_pool | |
3876f04e | 2644 | + MAYBE_SWAP (index->symbol_table[i + 1])); |
0cf03b49 | 2645 | do_cleanups (back_to); |
9291a0cd TT |
2646 | return 1; |
2647 | } | |
2648 | ||
3876f04e | 2649 | slot = (slot + step) & (index->symbol_table_slots - 1); |
9291a0cd TT |
2650 | } |
2651 | } | |
2652 | ||
2ec9a5e0 TT |
2653 | /* A helper function that reads the .gdb_index from SECTION and fills |
2654 | in MAP. FILENAME is the name of the file containing the section; | |
2655 | it is used for error reporting. DEPRECATED_OK is nonzero if it is | |
2656 | ok to use deprecated sections. | |
2657 | ||
2658 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2659 | out parameters that are filled in with information about the CU and | |
2660 | TU lists in the section. | |
2661 | ||
2662 | Returns 1 if all went well, 0 otherwise. */ | |
2fdf6df6 | 2663 | |
9291a0cd | 2664 | static int |
2ec9a5e0 TT |
2665 | read_index_from_section (struct objfile *objfile, |
2666 | const char *filename, | |
2667 | int deprecated_ok, | |
2668 | struct dwarf2_section_info *section, | |
2669 | struct mapped_index *map, | |
2670 | const gdb_byte **cu_list, | |
2671 | offset_type *cu_list_elements, | |
2672 | const gdb_byte **types_list, | |
2673 | offset_type *types_list_elements) | |
9291a0cd | 2674 | { |
948f8e3d | 2675 | const gdb_byte *addr; |
2ec9a5e0 | 2676 | offset_type version; |
b3b272e1 | 2677 | offset_type *metadata; |
1fd400ff | 2678 | int i; |
9291a0cd | 2679 | |
2ec9a5e0 | 2680 | if (dwarf2_section_empty_p (section)) |
9291a0cd | 2681 | return 0; |
82430852 JK |
2682 | |
2683 | /* Older elfutils strip versions could keep the section in the main | |
2684 | executable while splitting it for the separate debug info file. */ | |
2ec9a5e0 | 2685 | if ((bfd_get_file_flags (section->asection) & SEC_HAS_CONTENTS) == 0) |
82430852 JK |
2686 | return 0; |
2687 | ||
2ec9a5e0 | 2688 | dwarf2_read_section (objfile, section); |
9291a0cd | 2689 | |
2ec9a5e0 | 2690 | addr = section->buffer; |
9291a0cd | 2691 | /* Version check. */ |
1fd400ff | 2692 | version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2693 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2694 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2695 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2696 | indices. */ |
831adc1f | 2697 | if (version < 4) |
481860b3 GB |
2698 | { |
2699 | static int warning_printed = 0; | |
2700 | if (!warning_printed) | |
2701 | { | |
2702 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2703 | filename); |
481860b3 GB |
2704 | warning_printed = 1; |
2705 | } | |
2706 | return 0; | |
2707 | } | |
2708 | /* Index version 4 uses a different hash function than index version | |
2709 | 5 and later. | |
2710 | ||
2711 | Versions earlier than 6 did not emit psymbols for inlined | |
2712 | functions. Using these files will cause GDB not to be able to | |
2713 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2714 | indices unless the user has done |
2715 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2716 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2717 | { |
2718 | static int warning_printed = 0; | |
2719 | if (!warning_printed) | |
2720 | { | |
e615022a DE |
2721 | warning (_("\ |
2722 | Skipping deprecated .gdb_index section in %s.\n\ | |
2723 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2724 | to use the section anyway."), | |
2ec9a5e0 | 2725 | filename); |
481860b3 GB |
2726 | warning_printed = 1; |
2727 | } | |
2728 | return 0; | |
2729 | } | |
796a7ff8 DE |
2730 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
2731 | of the TU (for symbols coming from TUs). It's just a performance bug, and | |
2732 | we can't distinguish gdb-generated indices from gold-generated ones, so | |
2733 | nothing to do here. */ | |
2734 | ||
481860b3 | 2735 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2736 | longer backward compatible. */ |
796a7ff8 | 2737 | if (version > 8) |
594e8718 | 2738 | return 0; |
9291a0cd | 2739 | |
559a7a62 | 2740 | map->version = version; |
2ec9a5e0 | 2741 | map->total_size = section->size; |
9291a0cd TT |
2742 | |
2743 | metadata = (offset_type *) (addr + sizeof (offset_type)); | |
1fd400ff TT |
2744 | |
2745 | i = 0; | |
2ec9a5e0 TT |
2746 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2747 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2748 | / 8); | |
1fd400ff TT |
2749 | ++i; |
2750 | ||
2ec9a5e0 TT |
2751 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2752 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2753 | - MAYBE_SWAP (metadata[i])) | |
2754 | / 8); | |
987d643c | 2755 | ++i; |
1fd400ff TT |
2756 | |
2757 | map->address_table = addr + MAYBE_SWAP (metadata[i]); | |
2758 | map->address_table_size = (MAYBE_SWAP (metadata[i + 1]) | |
2759 | - MAYBE_SWAP (metadata[i])); | |
2760 | ++i; | |
2761 | ||
3876f04e DE |
2762 | map->symbol_table = (offset_type *) (addr + MAYBE_SWAP (metadata[i])); |
2763 | map->symbol_table_slots = ((MAYBE_SWAP (metadata[i + 1]) | |
2764 | - MAYBE_SWAP (metadata[i])) | |
2765 | / (2 * sizeof (offset_type))); | |
1fd400ff | 2766 | ++i; |
9291a0cd | 2767 | |
f9d83a0b | 2768 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 2769 | |
2ec9a5e0 TT |
2770 | return 1; |
2771 | } | |
2772 | ||
2773 | ||
2774 | /* Read the index file. If everything went ok, initialize the "quick" | |
2775 | elements of all the CUs and return 1. Otherwise, return 0. */ | |
2776 | ||
2777 | static int | |
2778 | dwarf2_read_index (struct objfile *objfile) | |
2779 | { | |
2780 | struct mapped_index local_map, *map; | |
2781 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; | |
2782 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
2783 | ||
2784 | if (!read_index_from_section (objfile, objfile->name, | |
2785 | use_deprecated_index_sections, | |
2786 | &dwarf2_per_objfile->gdb_index, &local_map, | |
2787 | &cu_list, &cu_list_elements, | |
2788 | &types_list, &types_list_elements)) | |
2789 | return 0; | |
2790 | ||
0fefef59 | 2791 | /* Don't use the index if it's empty. */ |
2ec9a5e0 | 2792 | if (local_map.symbol_table_slots == 0) |
0fefef59 DE |
2793 | return 0; |
2794 | ||
2ec9a5e0 TT |
2795 | /* If there is a .dwz file, read it so we can get its CU list as |
2796 | well. */ | |
2797 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
2798 | { | |
2799 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
2800 | struct mapped_index dwz_map; | |
2801 | const gdb_byte *dwz_types_ignore; | |
2802 | offset_type dwz_types_elements_ignore; | |
2803 | ||
2804 | if (!read_index_from_section (objfile, bfd_get_filename (dwz->dwz_bfd), | |
2805 | 1, | |
2806 | &dwz->gdb_index, &dwz_map, | |
2807 | &dwz_list, &dwz_list_elements, | |
2808 | &dwz_types_ignore, | |
2809 | &dwz_types_elements_ignore)) | |
2810 | { | |
2811 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
2812 | bfd_get_filename (dwz->dwz_bfd)); | |
2813 | return 0; | |
2814 | } | |
2815 | } | |
2816 | ||
74a0d9f6 JK |
2817 | create_cus_from_index (objfile, cu_list, cu_list_elements, dwz_list, |
2818 | dwz_list_elements); | |
1fd400ff | 2819 | |
8b70b953 TT |
2820 | if (types_list_elements) |
2821 | { | |
2822 | struct dwarf2_section_info *section; | |
2823 | ||
2824 | /* We can only handle a single .debug_types when we have an | |
2825 | index. */ | |
2826 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) != 1) | |
2827 | return 0; | |
2828 | ||
2829 | section = VEC_index (dwarf2_section_info_def, | |
2830 | dwarf2_per_objfile->types, 0); | |
2831 | ||
74a0d9f6 JK |
2832 | create_signatured_type_table_from_index (objfile, section, types_list, |
2833 | types_list_elements); | |
8b70b953 | 2834 | } |
9291a0cd | 2835 | |
2ec9a5e0 TT |
2836 | create_addrmap_from_index (objfile, &local_map); |
2837 | ||
2838 | map = obstack_alloc (&objfile->objfile_obstack, sizeof (struct mapped_index)); | |
2839 | *map = local_map; | |
9291a0cd TT |
2840 | |
2841 | dwarf2_per_objfile->index_table = map; | |
2842 | dwarf2_per_objfile->using_index = 1; | |
7b9f3c50 DE |
2843 | dwarf2_per_objfile->quick_file_names_table = |
2844 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd TT |
2845 | |
2846 | return 1; | |
2847 | } | |
2848 | ||
2849 | /* A helper for the "quick" functions which sets the global | |
2850 | dwarf2_per_objfile according to OBJFILE. */ | |
2fdf6df6 | 2851 | |
9291a0cd TT |
2852 | static void |
2853 | dw2_setup (struct objfile *objfile) | |
2854 | { | |
2855 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
2856 | gdb_assert (dwarf2_per_objfile); | |
2857 | } | |
2858 | ||
dee91e82 | 2859 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 2860 | |
dee91e82 DE |
2861 | static void |
2862 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 2863 | const gdb_byte *info_ptr, |
dee91e82 DE |
2864 | struct die_info *comp_unit_die, |
2865 | int has_children, | |
2866 | void *data) | |
9291a0cd | 2867 | { |
dee91e82 DE |
2868 | struct dwarf2_cu *cu = reader->cu; |
2869 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; | |
2870 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 2871 | struct dwarf2_per_cu_data *lh_cu; |
7b9f3c50 | 2872 | struct line_header *lh; |
9291a0cd | 2873 | struct attribute *attr; |
dee91e82 | 2874 | int i; |
15d034d0 | 2875 | const char *name, *comp_dir; |
7b9f3c50 DE |
2876 | void **slot; |
2877 | struct quick_file_names *qfn; | |
2878 | unsigned int line_offset; | |
9291a0cd | 2879 | |
0186c6a7 DE |
2880 | gdb_assert (! this_cu->is_debug_types); |
2881 | ||
07261596 TT |
2882 | /* Our callers never want to match partial units -- instead they |
2883 | will match the enclosing full CU. */ | |
2884 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
2885 | { | |
2886 | this_cu->v.quick->no_file_data = 1; | |
2887 | return; | |
2888 | } | |
2889 | ||
0186c6a7 | 2890 | lh_cu = this_cu; |
7b9f3c50 DE |
2891 | lh = NULL; |
2892 | slot = NULL; | |
2893 | line_offset = 0; | |
dee91e82 DE |
2894 | |
2895 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); | |
9291a0cd TT |
2896 | if (attr) |
2897 | { | |
7b9f3c50 DE |
2898 | struct quick_file_names find_entry; |
2899 | ||
2900 | line_offset = DW_UNSND (attr); | |
2901 | ||
2902 | /* We may have already read in this line header (TU line header sharing). | |
2903 | If we have we're done. */ | |
094b34ac DE |
2904 | find_entry.hash.dwo_unit = cu->dwo_unit; |
2905 | find_entry.hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2906 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
2907 | &find_entry, INSERT); | |
2908 | if (*slot != NULL) | |
2909 | { | |
094b34ac | 2910 | lh_cu->v.quick->file_names = *slot; |
dee91e82 | 2911 | return; |
7b9f3c50 DE |
2912 | } |
2913 | ||
3019eac3 | 2914 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
2915 | } |
2916 | if (lh == NULL) | |
2917 | { | |
094b34ac | 2918 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 2919 | return; |
9291a0cd TT |
2920 | } |
2921 | ||
7b9f3c50 | 2922 | qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn)); |
094b34ac DE |
2923 | qfn->hash.dwo_unit = cu->dwo_unit; |
2924 | qfn->hash.line_offset.sect_off = line_offset; | |
7b9f3c50 DE |
2925 | gdb_assert (slot != NULL); |
2926 | *slot = qfn; | |
9291a0cd | 2927 | |
dee91e82 | 2928 | find_file_and_directory (comp_unit_die, cu, &name, &comp_dir); |
9291a0cd | 2929 | |
7b9f3c50 DE |
2930 | qfn->num_file_names = lh->num_file_names; |
2931 | qfn->file_names = obstack_alloc (&objfile->objfile_obstack, | |
2932 | lh->num_file_names * sizeof (char *)); | |
9291a0cd | 2933 | for (i = 0; i < lh->num_file_names; ++i) |
7b9f3c50 DE |
2934 | qfn->file_names[i] = file_full_name (i + 1, lh, comp_dir); |
2935 | qfn->real_names = NULL; | |
9291a0cd | 2936 | |
7b9f3c50 | 2937 | free_line_header (lh); |
7b9f3c50 | 2938 | |
094b34ac | 2939 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
2940 | } |
2941 | ||
2942 | /* A helper for the "quick" functions which attempts to read the line | |
2943 | table for THIS_CU. */ | |
2944 | ||
2945 | static struct quick_file_names * | |
e4a48d9d | 2946 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 2947 | { |
0186c6a7 DE |
2948 | /* This should never be called for TUs. */ |
2949 | gdb_assert (! this_cu->is_debug_types); | |
2950 | /* Nor type unit groups. */ | |
2951 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 2952 | |
dee91e82 DE |
2953 | if (this_cu->v.quick->file_names != NULL) |
2954 | return this_cu->v.quick->file_names; | |
2955 | /* If we know there is no line data, no point in looking again. */ | |
2956 | if (this_cu->v.quick->no_file_data) | |
2957 | return NULL; | |
2958 | ||
0186c6a7 | 2959 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
2960 | |
2961 | if (this_cu->v.quick->no_file_data) | |
2962 | return NULL; | |
2963 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
2964 | } |
2965 | ||
2966 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 2967 | real path for a given file name from the line table. */ |
2fdf6df6 | 2968 | |
9291a0cd | 2969 | static const char * |
7b9f3c50 DE |
2970 | dw2_get_real_path (struct objfile *objfile, |
2971 | struct quick_file_names *qfn, int index) | |
9291a0cd | 2972 | { |
7b9f3c50 DE |
2973 | if (qfn->real_names == NULL) |
2974 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
2975 | qfn->num_file_names, sizeof (char *)); | |
9291a0cd | 2976 | |
7b9f3c50 DE |
2977 | if (qfn->real_names[index] == NULL) |
2978 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]); | |
9291a0cd | 2979 | |
7b9f3c50 | 2980 | return qfn->real_names[index]; |
9291a0cd TT |
2981 | } |
2982 | ||
2983 | static struct symtab * | |
2984 | dw2_find_last_source_symtab (struct objfile *objfile) | |
2985 | { | |
2986 | int index; | |
ae2de4f8 | 2987 | |
9291a0cd TT |
2988 | dw2_setup (objfile); |
2989 | index = dwarf2_per_objfile->n_comp_units - 1; | |
a0f42c21 | 2990 | return dw2_instantiate_symtab (dw2_get_cu (index)); |
9291a0cd TT |
2991 | } |
2992 | ||
7b9f3c50 DE |
2993 | /* Traversal function for dw2_forget_cached_source_info. */ |
2994 | ||
2995 | static int | |
2996 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 2997 | { |
7b9f3c50 | 2998 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 2999 | |
7b9f3c50 | 3000 | if (file_data->real_names) |
9291a0cd | 3001 | { |
7b9f3c50 | 3002 | int i; |
9291a0cd | 3003 | |
7b9f3c50 | 3004 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3005 | { |
7b9f3c50 DE |
3006 | xfree ((void*) file_data->real_names[i]); |
3007 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3008 | } |
3009 | } | |
7b9f3c50 DE |
3010 | |
3011 | return 1; | |
3012 | } | |
3013 | ||
3014 | static void | |
3015 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3016 | { | |
3017 | dw2_setup (objfile); | |
3018 | ||
3019 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3020 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3021 | } |
3022 | ||
f8eba3c6 TT |
3023 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3024 | the symtabs and calls the iterator. */ | |
3025 | ||
3026 | static int | |
3027 | dw2_map_expand_apply (struct objfile *objfile, | |
3028 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3029 | const char *name, const char *real_path, |
f8eba3c6 TT |
3030 | int (*callback) (struct symtab *, void *), |
3031 | void *data) | |
3032 | { | |
3033 | struct symtab *last_made = objfile->symtabs; | |
3034 | ||
3035 | /* Don't visit already-expanded CUs. */ | |
3036 | if (per_cu->v.quick->symtab) | |
3037 | return 0; | |
3038 | ||
3039 | /* This may expand more than one symtab, and we want to iterate over | |
3040 | all of them. */ | |
a0f42c21 | 3041 | dw2_instantiate_symtab (per_cu); |
f8eba3c6 | 3042 | |
f5b95b50 | 3043 | return iterate_over_some_symtabs (name, real_path, callback, data, |
f8eba3c6 TT |
3044 | objfile->symtabs, last_made); |
3045 | } | |
3046 | ||
3047 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3048 | ||
9291a0cd | 3049 | static int |
f8eba3c6 | 3050 | dw2_map_symtabs_matching_filename (struct objfile *objfile, const char *name, |
f5b95b50 | 3051 | const char *real_path, |
f8eba3c6 TT |
3052 | int (*callback) (struct symtab *, void *), |
3053 | void *data) | |
9291a0cd TT |
3054 | { |
3055 | int i; | |
c011a4f4 | 3056 | const char *name_basename = lbasename (name); |
9291a0cd TT |
3057 | |
3058 | dw2_setup (objfile); | |
ae2de4f8 | 3059 | |
848e3e78 DE |
3060 | /* The rule is CUs specify all the files, including those used by |
3061 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3062 | |
848e3e78 | 3063 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3064 | { |
3065 | int j; | |
f4dc4d17 | 3066 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3067 | struct quick_file_names *file_data; |
9291a0cd | 3068 | |
3d7bb9d9 | 3069 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3070 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3071 | continue; |
3072 | ||
e4a48d9d | 3073 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3074 | if (file_data == NULL) |
9291a0cd TT |
3075 | continue; |
3076 | ||
7b9f3c50 | 3077 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3078 | { |
7b9f3c50 | 3079 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3080 | const char *this_real_name; |
9291a0cd | 3081 | |
af529f8f | 3082 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3083 | { |
f5b95b50 | 3084 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3085 | callback, data)) |
3086 | return 1; | |
288e77a7 | 3087 | continue; |
4aac40c8 | 3088 | } |
9291a0cd | 3089 | |
c011a4f4 DE |
3090 | /* Before we invoke realpath, which can get expensive when many |
3091 | files are involved, do a quick comparison of the basenames. */ | |
3092 | if (! basenames_may_differ | |
3093 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3094 | continue; | |
3095 | ||
da235a7c JK |
3096 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3097 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3098 | { |
da235a7c JK |
3099 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
3100 | callback, data)) | |
3101 | return 1; | |
288e77a7 | 3102 | continue; |
da235a7c | 3103 | } |
9291a0cd | 3104 | |
da235a7c JK |
3105 | if (real_path != NULL) |
3106 | { | |
af529f8f JK |
3107 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3108 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3109 | if (this_real_name != NULL |
af529f8f | 3110 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3111 | { |
f5b95b50 | 3112 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
f8eba3c6 TT |
3113 | callback, data)) |
3114 | return 1; | |
288e77a7 | 3115 | continue; |
9291a0cd TT |
3116 | } |
3117 | } | |
3118 | } | |
3119 | } | |
3120 | ||
9291a0cd TT |
3121 | return 0; |
3122 | } | |
3123 | ||
da51c347 DE |
3124 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3125 | ||
3126 | struct dw2_symtab_iterator | |
9291a0cd | 3127 | { |
da51c347 DE |
3128 | /* The internalized form of .gdb_index. */ |
3129 | struct mapped_index *index; | |
3130 | /* If non-zero, only look for symbols that match BLOCK_INDEX. */ | |
3131 | int want_specific_block; | |
3132 | /* One of GLOBAL_BLOCK or STATIC_BLOCK. | |
3133 | Unused if !WANT_SPECIFIC_BLOCK. */ | |
3134 | int block_index; | |
3135 | /* The kind of symbol we're looking for. */ | |
3136 | domain_enum domain; | |
3137 | /* The list of CUs from the index entry of the symbol, | |
3138 | or NULL if not found. */ | |
3139 | offset_type *vec; | |
3140 | /* The next element in VEC to look at. */ | |
3141 | int next; | |
3142 | /* The number of elements in VEC, or zero if there is no match. */ | |
3143 | int length; | |
3144 | }; | |
9291a0cd | 3145 | |
da51c347 DE |
3146 | /* Initialize the index symtab iterator ITER. |
3147 | If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols | |
3148 | in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */ | |
2fdf6df6 | 3149 | |
9291a0cd | 3150 | static void |
da51c347 DE |
3151 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3152 | struct mapped_index *index, | |
3153 | int want_specific_block, | |
3154 | int block_index, | |
3155 | domain_enum domain, | |
3156 | const char *name) | |
3157 | { | |
3158 | iter->index = index; | |
3159 | iter->want_specific_block = want_specific_block; | |
3160 | iter->block_index = block_index; | |
3161 | iter->domain = domain; | |
3162 | iter->next = 0; | |
3163 | ||
3164 | if (find_slot_in_mapped_hash (index, name, &iter->vec)) | |
3165 | iter->length = MAYBE_SWAP (*iter->vec); | |
3166 | else | |
3167 | { | |
3168 | iter->vec = NULL; | |
3169 | iter->length = 0; | |
3170 | } | |
3171 | } | |
3172 | ||
3173 | /* Return the next matching CU or NULL if there are no more. */ | |
3174 | ||
3175 | static struct dwarf2_per_cu_data * | |
3176 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3177 | { | |
3178 | for ( ; iter->next < iter->length; ++iter->next) | |
3179 | { | |
3180 | offset_type cu_index_and_attrs = | |
3181 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3182 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3183 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (cu_index); | |
3184 | int want_static = iter->block_index != GLOBAL_BLOCK; | |
3185 | /* This value is only valid for index versions >= 7. */ | |
3186 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
3187 | gdb_index_symbol_kind symbol_kind = | |
3188 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3189 | /* Only check the symbol attributes if they're present. | |
3190 | Indices prior to version 7 don't record them, | |
3191 | and indices >= 7 may elide them for certain symbols | |
3192 | (gold does this). */ | |
3193 | int attrs_valid = | |
3194 | (iter->index->version >= 7 | |
3195 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
3196 | ||
3197 | /* Skip if already read in. */ | |
3198 | if (per_cu->v.quick->symtab) | |
3199 | continue; | |
3200 | ||
3201 | if (attrs_valid | |
3202 | && iter->want_specific_block | |
3203 | && want_static != is_static) | |
3204 | continue; | |
3205 | ||
3206 | /* Only check the symbol's kind if it has one. */ | |
3207 | if (attrs_valid) | |
3208 | { | |
3209 | switch (iter->domain) | |
3210 | { | |
3211 | case VAR_DOMAIN: | |
3212 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3213 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3214 | /* Some types are also in VAR_DOMAIN. */ | |
3215 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3216 | continue; | |
3217 | break; | |
3218 | case STRUCT_DOMAIN: | |
3219 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3220 | continue; | |
3221 | break; | |
3222 | case LABEL_DOMAIN: | |
3223 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3224 | continue; | |
3225 | break; | |
3226 | default: | |
3227 | break; | |
3228 | } | |
3229 | } | |
3230 | ||
3231 | ++iter->next; | |
3232 | return per_cu; | |
3233 | } | |
3234 | ||
3235 | return NULL; | |
3236 | } | |
3237 | ||
3238 | static struct symtab * | |
3239 | dw2_lookup_symbol (struct objfile *objfile, int block_index, | |
3240 | const char *name, domain_enum domain) | |
9291a0cd | 3241 | { |
da51c347 | 3242 | struct symtab *stab_best = NULL; |
156942c7 DE |
3243 | struct mapped_index *index; |
3244 | ||
9291a0cd TT |
3245 | dw2_setup (objfile); |
3246 | ||
156942c7 DE |
3247 | index = dwarf2_per_objfile->index_table; |
3248 | ||
da51c347 | 3249 | /* index is NULL if OBJF_READNOW. */ |
156942c7 | 3250 | if (index) |
9291a0cd | 3251 | { |
da51c347 DE |
3252 | struct dw2_symtab_iterator iter; |
3253 | struct dwarf2_per_cu_data *per_cu; | |
3254 | ||
3255 | dw2_symtab_iter_init (&iter, index, 1, block_index, domain, name); | |
9291a0cd | 3256 | |
da51c347 | 3257 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
9291a0cd | 3258 | { |
da51c347 DE |
3259 | struct symbol *sym = NULL; |
3260 | struct symtab *stab = dw2_instantiate_symtab (per_cu); | |
3261 | ||
3262 | /* Some caution must be observed with overloaded functions | |
3263 | and methods, since the index will not contain any overload | |
3264 | information (but NAME might contain it). */ | |
3265 | if (stab->primary) | |
9291a0cd | 3266 | { |
da51c347 DE |
3267 | struct blockvector *bv = BLOCKVECTOR (stab); |
3268 | struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); | |
156942c7 | 3269 | |
da51c347 DE |
3270 | sym = lookup_block_symbol (block, name, domain); |
3271 | } | |
1fd400ff | 3272 | |
da51c347 DE |
3273 | if (sym && strcmp_iw (SYMBOL_SEARCH_NAME (sym), name) == 0) |
3274 | { | |
3275 | if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym))) | |
3276 | return stab; | |
3277 | ||
3278 | stab_best = stab; | |
9291a0cd | 3279 | } |
da51c347 DE |
3280 | |
3281 | /* Keep looking through other CUs. */ | |
9291a0cd TT |
3282 | } |
3283 | } | |
9291a0cd | 3284 | |
da51c347 | 3285 | return stab_best; |
9291a0cd TT |
3286 | } |
3287 | ||
3288 | static void | |
3289 | dw2_print_stats (struct objfile *objfile) | |
3290 | { | |
e4a48d9d | 3291 | int i, total, count; |
9291a0cd TT |
3292 | |
3293 | dw2_setup (objfile); | |
e4a48d9d | 3294 | total = dwarf2_per_objfile->n_comp_units + dwarf2_per_objfile->n_type_units; |
9291a0cd | 3295 | count = 0; |
e4a48d9d | 3296 | for (i = 0; i < total; ++i) |
9291a0cd | 3297 | { |
e254ef6a | 3298 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3299 | |
e254ef6a | 3300 | if (!per_cu->v.quick->symtab) |
9291a0cd TT |
3301 | ++count; |
3302 | } | |
e4a48d9d | 3303 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3304 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3305 | } | |
3306 | ||
3307 | static void | |
3308 | dw2_dump (struct objfile *objfile) | |
3309 | { | |
3310 | /* Nothing worth printing. */ | |
3311 | } | |
3312 | ||
3313 | static void | |
3314 | dw2_relocate (struct objfile *objfile, struct section_offsets *new_offsets, | |
3315 | struct section_offsets *delta) | |
3316 | { | |
3317 | /* There's nothing to relocate here. */ | |
3318 | } | |
3319 | ||
3320 | static void | |
3321 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3322 | const char *func_name) | |
3323 | { | |
da51c347 DE |
3324 | struct mapped_index *index; |
3325 | ||
3326 | dw2_setup (objfile); | |
3327 | ||
3328 | index = dwarf2_per_objfile->index_table; | |
3329 | ||
3330 | /* index is NULL if OBJF_READNOW. */ | |
3331 | if (index) | |
3332 | { | |
3333 | struct dw2_symtab_iterator iter; | |
3334 | struct dwarf2_per_cu_data *per_cu; | |
3335 | ||
3336 | /* Note: It doesn't matter what we pass for block_index here. */ | |
3337 | dw2_symtab_iter_init (&iter, index, 0, GLOBAL_BLOCK, VAR_DOMAIN, | |
3338 | func_name); | |
3339 | ||
3340 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) | |
3341 | dw2_instantiate_symtab (per_cu); | |
3342 | } | |
9291a0cd TT |
3343 | } |
3344 | ||
3345 | static void | |
3346 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3347 | { | |
3348 | int i; | |
3349 | ||
3350 | dw2_setup (objfile); | |
1fd400ff TT |
3351 | |
3352 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units | |
d467dd73 | 3353 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3354 | { |
e254ef6a | 3355 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3356 | |
a0f42c21 | 3357 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3358 | } |
3359 | } | |
3360 | ||
3361 | static void | |
652a8996 JK |
3362 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3363 | const char *fullname) | |
9291a0cd TT |
3364 | { |
3365 | int i; | |
3366 | ||
3367 | dw2_setup (objfile); | |
d4637a04 DE |
3368 | |
3369 | /* We don't need to consider type units here. | |
3370 | This is only called for examining code, e.g. expand_line_sal. | |
3371 | There can be an order of magnitude (or more) more type units | |
3372 | than comp units, and we avoid them if we can. */ | |
3373 | ||
3374 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
9291a0cd TT |
3375 | { |
3376 | int j; | |
e254ef6a | 3377 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
7b9f3c50 | 3378 | struct quick_file_names *file_data; |
9291a0cd | 3379 | |
3d7bb9d9 | 3380 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3381 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3382 | continue; |
3383 | ||
e4a48d9d | 3384 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3385 | if (file_data == NULL) |
9291a0cd TT |
3386 | continue; |
3387 | ||
7b9f3c50 | 3388 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3389 | { |
652a8996 JK |
3390 | const char *this_fullname = file_data->file_names[j]; |
3391 | ||
3392 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3393 | { |
a0f42c21 | 3394 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3395 | break; |
3396 | } | |
3397 | } | |
3398 | } | |
3399 | } | |
3400 | ||
356d9f9d TT |
3401 | /* A helper function for dw2_find_symbol_file that finds the primary |
3402 | file name for a given CU. This is a die_reader_func. */ | |
3403 | ||
3404 | static void | |
3405 | dw2_get_primary_filename_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3406 | const gdb_byte *info_ptr, |
356d9f9d TT |
3407 | struct die_info *comp_unit_die, |
3408 | int has_children, | |
3409 | void *data) | |
3410 | { | |
3411 | const char **result_ptr = data; | |
3412 | struct dwarf2_cu *cu = reader->cu; | |
3413 | struct attribute *attr; | |
3414 | ||
3415 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
3416 | if (attr == NULL) | |
3417 | *result_ptr = NULL; | |
3418 | else | |
3419 | *result_ptr = DW_STRING (attr); | |
3420 | } | |
3421 | ||
dd786858 | 3422 | static const char * |
9291a0cd TT |
3423 | dw2_find_symbol_file (struct objfile *objfile, const char *name) |
3424 | { | |
e254ef6a | 3425 | struct dwarf2_per_cu_data *per_cu; |
9291a0cd | 3426 | offset_type *vec; |
356d9f9d | 3427 | const char *filename; |
9291a0cd TT |
3428 | |
3429 | dw2_setup (objfile); | |
3430 | ||
ae2de4f8 | 3431 | /* index_table is NULL if OBJF_READNOW. */ |
9291a0cd | 3432 | if (!dwarf2_per_objfile->index_table) |
96408a79 SA |
3433 | { |
3434 | struct symtab *s; | |
3435 | ||
d790cf0a DE |
3436 | ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s) |
3437 | { | |
3438 | struct blockvector *bv = BLOCKVECTOR (s); | |
3439 | const struct block *block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); | |
3440 | struct symbol *sym = lookup_block_symbol (block, name, VAR_DOMAIN); | |
3441 | ||
3442 | if (sym) | |
652a8996 JK |
3443 | { |
3444 | /* Only file extension of returned filename is recognized. */ | |
3445 | return SYMBOL_SYMTAB (sym)->filename; | |
3446 | } | |
d790cf0a | 3447 | } |
96408a79 SA |
3448 | return NULL; |
3449 | } | |
9291a0cd TT |
3450 | |
3451 | if (!find_slot_in_mapped_hash (dwarf2_per_objfile->index_table, | |
3452 | name, &vec)) | |
3453 | return NULL; | |
3454 | ||
3455 | /* Note that this just looks at the very first one named NAME -- but | |
3456 | actually we are looking for a function. find_main_filename | |
3457 | should be rewritten so that it doesn't require a custom hook. It | |
3458 | could just use the ordinary symbol tables. */ | |
3459 | /* vec[0] is the length, which must always be >0. */ | |
156942c7 | 3460 | per_cu = dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec[1]))); |
9291a0cd | 3461 | |
356d9f9d | 3462 | if (per_cu->v.quick->symtab != NULL) |
652a8996 JK |
3463 | { |
3464 | /* Only file extension of returned filename is recognized. */ | |
3465 | return per_cu->v.quick->symtab->filename; | |
3466 | } | |
356d9f9d | 3467 | |
f4dc4d17 DE |
3468 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, |
3469 | dw2_get_primary_filename_reader, &filename); | |
9291a0cd | 3470 | |
652a8996 | 3471 | /* Only file extension of returned filename is recognized. */ |
356d9f9d | 3472 | return filename; |
9291a0cd TT |
3473 | } |
3474 | ||
3475 | static void | |
40658b94 PH |
3476 | dw2_map_matching_symbols (const char * name, domain_enum namespace, |
3477 | struct objfile *objfile, int global, | |
3478 | int (*callback) (struct block *, | |
3479 | struct symbol *, void *), | |
2edb89d3 JK |
3480 | void *data, symbol_compare_ftype *match, |
3481 | symbol_compare_ftype *ordered_compare) | |
9291a0cd | 3482 | { |
40658b94 | 3483 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3484 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3485 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3486 | } |
3487 | ||
3488 | static void | |
f8eba3c6 TT |
3489 | dw2_expand_symtabs_matching |
3490 | (struct objfile *objfile, | |
fbd9ab74 | 3491 | int (*file_matcher) (const char *, void *, int basenames), |
e078317b | 3492 | int (*name_matcher) (const char *, void *), |
f8eba3c6 TT |
3493 | enum search_domain kind, |
3494 | void *data) | |
9291a0cd TT |
3495 | { |
3496 | int i; | |
3497 | offset_type iter; | |
4b5246aa | 3498 | struct mapped_index *index; |
9291a0cd TT |
3499 | |
3500 | dw2_setup (objfile); | |
ae2de4f8 DE |
3501 | |
3502 | /* index_table is NULL if OBJF_READNOW. */ | |
9291a0cd TT |
3503 | if (!dwarf2_per_objfile->index_table) |
3504 | return; | |
4b5246aa | 3505 | index = dwarf2_per_objfile->index_table; |
9291a0cd | 3506 | |
7b08b9eb | 3507 | if (file_matcher != NULL) |
24c79950 TT |
3508 | { |
3509 | struct cleanup *cleanup; | |
3510 | htab_t visited_found, visited_not_found; | |
3511 | ||
3512 | visited_found = htab_create_alloc (10, | |
3513 | htab_hash_pointer, htab_eq_pointer, | |
3514 | NULL, xcalloc, xfree); | |
3515 | cleanup = make_cleanup_htab_delete (visited_found); | |
3516 | visited_not_found = htab_create_alloc (10, | |
3517 | htab_hash_pointer, htab_eq_pointer, | |
3518 | NULL, xcalloc, xfree); | |
3519 | make_cleanup_htab_delete (visited_not_found); | |
3520 | ||
848e3e78 DE |
3521 | /* The rule is CUs specify all the files, including those used by |
3522 | any TU, so there's no need to scan TUs here. */ | |
3523 | ||
3524 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
24c79950 TT |
3525 | { |
3526 | int j; | |
f4dc4d17 | 3527 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
24c79950 TT |
3528 | struct quick_file_names *file_data; |
3529 | void **slot; | |
7b08b9eb | 3530 | |
24c79950 | 3531 | per_cu->v.quick->mark = 0; |
3d7bb9d9 | 3532 | |
24c79950 TT |
3533 | /* We only need to look at symtabs not already expanded. */ |
3534 | if (per_cu->v.quick->symtab) | |
3535 | continue; | |
7b08b9eb | 3536 | |
e4a48d9d | 3537 | file_data = dw2_get_file_names (per_cu); |
24c79950 TT |
3538 | if (file_data == NULL) |
3539 | continue; | |
7b08b9eb | 3540 | |
24c79950 TT |
3541 | if (htab_find (visited_not_found, file_data) != NULL) |
3542 | continue; | |
3543 | else if (htab_find (visited_found, file_data) != NULL) | |
3544 | { | |
3545 | per_cu->v.quick->mark = 1; | |
3546 | continue; | |
3547 | } | |
3548 | ||
3549 | for (j = 0; j < file_data->num_file_names; ++j) | |
3550 | { | |
da235a7c JK |
3551 | const char *this_real_name; |
3552 | ||
fbd9ab74 | 3553 | if (file_matcher (file_data->file_names[j], data, 0)) |
24c79950 TT |
3554 | { |
3555 | per_cu->v.quick->mark = 1; | |
3556 | break; | |
3557 | } | |
da235a7c JK |
3558 | |
3559 | /* Before we invoke realpath, which can get expensive when many | |
3560 | files are involved, do a quick comparison of the basenames. */ | |
3561 | if (!basenames_may_differ | |
3562 | && !file_matcher (lbasename (file_data->file_names[j]), | |
3563 | data, 1)) | |
3564 | continue; | |
3565 | ||
3566 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3567 | if (file_matcher (this_real_name, data, 0)) | |
3568 | { | |
3569 | per_cu->v.quick->mark = 1; | |
3570 | break; | |
3571 | } | |
24c79950 TT |
3572 | } |
3573 | ||
3574 | slot = htab_find_slot (per_cu->v.quick->mark | |
3575 | ? visited_found | |
3576 | : visited_not_found, | |
3577 | file_data, INSERT); | |
3578 | *slot = file_data; | |
3579 | } | |
3580 | ||
3581 | do_cleanups (cleanup); | |
3582 | } | |
9291a0cd | 3583 | |
3876f04e | 3584 | for (iter = 0; iter < index->symbol_table_slots; ++iter) |
9291a0cd TT |
3585 | { |
3586 | offset_type idx = 2 * iter; | |
3587 | const char *name; | |
3588 | offset_type *vec, vec_len, vec_idx; | |
3589 | ||
3876f04e | 3590 | if (index->symbol_table[idx] == 0 && index->symbol_table[idx + 1] == 0) |
9291a0cd TT |
3591 | continue; |
3592 | ||
3876f04e | 3593 | name = index->constant_pool + MAYBE_SWAP (index->symbol_table[idx]); |
9291a0cd | 3594 | |
e078317b | 3595 | if (! (*name_matcher) (name, data)) |
9291a0cd TT |
3596 | continue; |
3597 | ||
3598 | /* The name was matched, now expand corresponding CUs that were | |
3599 | marked. */ | |
4b5246aa | 3600 | vec = (offset_type *) (index->constant_pool |
3876f04e | 3601 | + MAYBE_SWAP (index->symbol_table[idx + 1])); |
9291a0cd TT |
3602 | vec_len = MAYBE_SWAP (vec[0]); |
3603 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
3604 | { | |
e254ef6a | 3605 | struct dwarf2_per_cu_data *per_cu; |
156942c7 DE |
3606 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
3607 | gdb_index_symbol_kind symbol_kind = | |
3608 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3609 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
3610 | ||
3611 | /* Don't crash on bad data. */ | |
3612 | if (cu_index >= (dwarf2_per_objfile->n_comp_units | |
667e0a4b | 3613 | + dwarf2_per_objfile->n_type_units)) |
156942c7 | 3614 | continue; |
1fd400ff | 3615 | |
156942c7 DE |
3616 | /* Only check the symbol's kind if it has one. |
3617 | Indices prior to version 7 don't record it. */ | |
3618 | if (index->version >= 7) | |
3619 | { | |
3620 | switch (kind) | |
3621 | { | |
3622 | case VARIABLES_DOMAIN: | |
3623 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
3624 | continue; | |
3625 | break; | |
3626 | case FUNCTIONS_DOMAIN: | |
3627 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
3628 | continue; | |
3629 | break; | |
3630 | case TYPES_DOMAIN: | |
3631 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3632 | continue; | |
3633 | break; | |
3634 | default: | |
3635 | break; | |
3636 | } | |
3637 | } | |
3638 | ||
3639 | per_cu = dw2_get_cu (cu_index); | |
7b08b9eb | 3640 | if (file_matcher == NULL || per_cu->v.quick->mark) |
a0f42c21 | 3641 | dw2_instantiate_symtab (per_cu); |
9291a0cd TT |
3642 | } |
3643 | } | |
3644 | } | |
3645 | ||
9703b513 TT |
3646 | /* A helper for dw2_find_pc_sect_symtab which finds the most specific |
3647 | symtab. */ | |
3648 | ||
3649 | static struct symtab * | |
3650 | recursively_find_pc_sect_symtab (struct symtab *symtab, CORE_ADDR pc) | |
3651 | { | |
3652 | int i; | |
3653 | ||
3654 | if (BLOCKVECTOR (symtab) != NULL | |
3655 | && blockvector_contains_pc (BLOCKVECTOR (symtab), pc)) | |
3656 | return symtab; | |
3657 | ||
a3ec0bb1 DE |
3658 | if (symtab->includes == NULL) |
3659 | return NULL; | |
3660 | ||
9703b513 TT |
3661 | for (i = 0; symtab->includes[i]; ++i) |
3662 | { | |
a3ec0bb1 | 3663 | struct symtab *s = symtab->includes[i]; |
9703b513 TT |
3664 | |
3665 | s = recursively_find_pc_sect_symtab (s, pc); | |
3666 | if (s != NULL) | |
3667 | return s; | |
3668 | } | |
3669 | ||
3670 | return NULL; | |
3671 | } | |
3672 | ||
9291a0cd TT |
3673 | static struct symtab * |
3674 | dw2_find_pc_sect_symtab (struct objfile *objfile, | |
3675 | struct minimal_symbol *msymbol, | |
3676 | CORE_ADDR pc, | |
3677 | struct obj_section *section, | |
3678 | int warn_if_readin) | |
3679 | { | |
3680 | struct dwarf2_per_cu_data *data; | |
9703b513 | 3681 | struct symtab *result; |
9291a0cd TT |
3682 | |
3683 | dw2_setup (objfile); | |
3684 | ||
3685 | if (!objfile->psymtabs_addrmap) | |
3686 | return NULL; | |
3687 | ||
3688 | data = addrmap_find (objfile->psymtabs_addrmap, pc); | |
3689 | if (!data) | |
3690 | return NULL; | |
3691 | ||
3692 | if (warn_if_readin && data->v.quick->symtab) | |
abebb8b0 | 3693 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
9291a0cd TT |
3694 | paddress (get_objfile_arch (objfile), pc)); |
3695 | ||
9703b513 TT |
3696 | result = recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data), pc); |
3697 | gdb_assert (result != NULL); | |
3698 | return result; | |
9291a0cd TT |
3699 | } |
3700 | ||
9291a0cd | 3701 | static void |
44b13c5a | 3702 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, |
74e2f255 | 3703 | void *data, int need_fullname) |
9291a0cd TT |
3704 | { |
3705 | int i; | |
24c79950 TT |
3706 | struct cleanup *cleanup; |
3707 | htab_t visited = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer, | |
3708 | NULL, xcalloc, xfree); | |
9291a0cd | 3709 | |
24c79950 | 3710 | cleanup = make_cleanup_htab_delete (visited); |
9291a0cd | 3711 | dw2_setup (objfile); |
ae2de4f8 | 3712 | |
848e3e78 DE |
3713 | /* The rule is CUs specify all the files, including those used by |
3714 | any TU, so there's no need to scan TUs here. | |
3715 | We can ignore file names coming from already-expanded CUs. */ | |
f4dc4d17 | 3716 | |
848e3e78 | 3717 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
24c79950 TT |
3718 | { |
3719 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
3720 | ||
3721 | if (per_cu->v.quick->symtab) | |
3722 | { | |
3723 | void **slot = htab_find_slot (visited, per_cu->v.quick->file_names, | |
3724 | INSERT); | |
3725 | ||
3726 | *slot = per_cu->v.quick->file_names; | |
3727 | } | |
3728 | } | |
3729 | ||
848e3e78 | 3730 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
9291a0cd TT |
3731 | { |
3732 | int j; | |
f4dc4d17 | 3733 | struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i); |
7b9f3c50 | 3734 | struct quick_file_names *file_data; |
24c79950 | 3735 | void **slot; |
9291a0cd | 3736 | |
3d7bb9d9 | 3737 | /* We only need to look at symtabs not already expanded. */ |
e254ef6a | 3738 | if (per_cu->v.quick->symtab) |
9291a0cd TT |
3739 | continue; |
3740 | ||
e4a48d9d | 3741 | file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3742 | if (file_data == NULL) |
9291a0cd TT |
3743 | continue; |
3744 | ||
24c79950 TT |
3745 | slot = htab_find_slot (visited, file_data, INSERT); |
3746 | if (*slot) | |
3747 | { | |
3748 | /* Already visited. */ | |
3749 | continue; | |
3750 | } | |
3751 | *slot = file_data; | |
3752 | ||
7b9f3c50 | 3753 | for (j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3754 | { |
74e2f255 DE |
3755 | const char *this_real_name; |
3756 | ||
3757 | if (need_fullname) | |
3758 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
3759 | else | |
3760 | this_real_name = NULL; | |
7b9f3c50 | 3761 | (*fun) (file_data->file_names[j], this_real_name, data); |
9291a0cd TT |
3762 | } |
3763 | } | |
24c79950 TT |
3764 | |
3765 | do_cleanups (cleanup); | |
9291a0cd TT |
3766 | } |
3767 | ||
3768 | static int | |
3769 | dw2_has_symbols (struct objfile *objfile) | |
3770 | { | |
3771 | return 1; | |
3772 | } | |
3773 | ||
3774 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
3775 | { | |
3776 | dw2_has_symbols, | |
3777 | dw2_find_last_source_symtab, | |
3778 | dw2_forget_cached_source_info, | |
f8eba3c6 | 3779 | dw2_map_symtabs_matching_filename, |
9291a0cd | 3780 | dw2_lookup_symbol, |
9291a0cd TT |
3781 | dw2_print_stats, |
3782 | dw2_dump, | |
3783 | dw2_relocate, | |
3784 | dw2_expand_symtabs_for_function, | |
3785 | dw2_expand_all_symtabs, | |
652a8996 | 3786 | dw2_expand_symtabs_with_fullname, |
9291a0cd | 3787 | dw2_find_symbol_file, |
40658b94 | 3788 | dw2_map_matching_symbols, |
9291a0cd TT |
3789 | dw2_expand_symtabs_matching, |
3790 | dw2_find_pc_sect_symtab, | |
9291a0cd TT |
3791 | dw2_map_symbol_filenames |
3792 | }; | |
3793 | ||
3794 | /* Initialize for reading DWARF for this objfile. Return 0 if this | |
3795 | file will use psymtabs, or 1 if using the GNU index. */ | |
3796 | ||
3797 | int | |
3798 | dwarf2_initialize_objfile (struct objfile *objfile) | |
3799 | { | |
3800 | /* If we're about to read full symbols, don't bother with the | |
3801 | indices. In this case we also don't care if some other debug | |
3802 | format is making psymtabs, because they are all about to be | |
3803 | expanded anyway. */ | |
3804 | if ((objfile->flags & OBJF_READNOW)) | |
3805 | { | |
3806 | int i; | |
3807 | ||
3808 | dwarf2_per_objfile->using_index = 1; | |
3809 | create_all_comp_units (objfile); | |
0e50663e | 3810 | create_all_type_units (objfile); |
7b9f3c50 DE |
3811 | dwarf2_per_objfile->quick_file_names_table = |
3812 | create_quick_file_names_table (dwarf2_per_objfile->n_comp_units); | |
9291a0cd | 3813 | |
1fd400ff | 3814 | for (i = 0; i < (dwarf2_per_objfile->n_comp_units |
d467dd73 | 3815 | + dwarf2_per_objfile->n_type_units); ++i) |
9291a0cd | 3816 | { |
e254ef6a | 3817 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
9291a0cd | 3818 | |
e254ef6a DE |
3819 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3820 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
3821 | } |
3822 | ||
3823 | /* Return 1 so that gdb sees the "quick" functions. However, | |
3824 | these functions will be no-ops because we will have expanded | |
3825 | all symtabs. */ | |
3826 | return 1; | |
3827 | } | |
3828 | ||
3829 | if (dwarf2_read_index (objfile)) | |
3830 | return 1; | |
3831 | ||
9291a0cd TT |
3832 | return 0; |
3833 | } | |
3834 | ||
3835 | \f | |
3836 | ||
dce234bc PP |
3837 | /* Build a partial symbol table. */ |
3838 | ||
3839 | void | |
f29dff0a | 3840 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 3841 | { |
c9bf0622 TT |
3842 | volatile struct gdb_exception except; |
3843 | ||
f29dff0a | 3844 | if (objfile->global_psymbols.size == 0 && objfile->static_psymbols.size == 0) |
c906108c SS |
3845 | { |
3846 | init_psymbol_list (objfile, 1024); | |
3847 | } | |
3848 | ||
c9bf0622 TT |
3849 | TRY_CATCH (except, RETURN_MASK_ERROR) |
3850 | { | |
3851 | /* This isn't really ideal: all the data we allocate on the | |
3852 | objfile's obstack is still uselessly kept around. However, | |
3853 | freeing it seems unsafe. */ | |
3854 | struct cleanup *cleanups = make_cleanup_discard_psymtabs (objfile); | |
3855 | ||
3856 | dwarf2_build_psymtabs_hard (objfile); | |
3857 | discard_cleanups (cleanups); | |
3858 | } | |
3859 | if (except.reason < 0) | |
3860 | exception_print (gdb_stderr, except); | |
c906108c | 3861 | } |
c906108c | 3862 | |
1ce1cefd DE |
3863 | /* Return the total length of the CU described by HEADER. */ |
3864 | ||
3865 | static unsigned int | |
3866 | get_cu_length (const struct comp_unit_head *header) | |
3867 | { | |
3868 | return header->initial_length_size + header->length; | |
3869 | } | |
3870 | ||
45452591 DE |
3871 | /* Return TRUE if OFFSET is within CU_HEADER. */ |
3872 | ||
3873 | static inline int | |
b64f50a1 | 3874 | offset_in_cu_p (const struct comp_unit_head *cu_header, sect_offset offset) |
45452591 | 3875 | { |
b64f50a1 | 3876 | sect_offset bottom = { cu_header->offset.sect_off }; |
1ce1cefd | 3877 | sect_offset top = { cu_header->offset.sect_off + get_cu_length (cu_header) }; |
9a619af0 | 3878 | |
b64f50a1 | 3879 | return (offset.sect_off >= bottom.sect_off && offset.sect_off < top.sect_off); |
45452591 DE |
3880 | } |
3881 | ||
3b80fe9b DE |
3882 | /* Find the base address of the compilation unit for range lists and |
3883 | location lists. It will normally be specified by DW_AT_low_pc. | |
3884 | In DWARF-3 draft 4, the base address could be overridden by | |
3885 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
3886 | compilation units with discontinuous ranges. */ | |
3887 | ||
3888 | static void | |
3889 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
3890 | { | |
3891 | struct attribute *attr; | |
3892 | ||
3893 | cu->base_known = 0; | |
3894 | cu->base_address = 0; | |
3895 | ||
3896 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
3897 | if (attr) | |
3898 | { | |
3899 | cu->base_address = DW_ADDR (attr); | |
3900 | cu->base_known = 1; | |
3901 | } | |
3902 | else | |
3903 | { | |
3904 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
3905 | if (attr) | |
3906 | { | |
3907 | cu->base_address = DW_ADDR (attr); | |
3908 | cu->base_known = 1; | |
3909 | } | |
3910 | } | |
3911 | } | |
3912 | ||
93311388 DE |
3913 | /* Read in the comp unit header information from the debug_info at info_ptr. |
3914 | NOTE: This leaves members offset, first_die_offset to be filled in | |
3915 | by the caller. */ | |
107d2387 | 3916 | |
d521ce57 | 3917 | static const gdb_byte * |
107d2387 | 3918 | read_comp_unit_head (struct comp_unit_head *cu_header, |
d521ce57 | 3919 | const gdb_byte *info_ptr, bfd *abfd) |
107d2387 AC |
3920 | { |
3921 | int signed_addr; | |
891d2f0b | 3922 | unsigned int bytes_read; |
c764a876 DE |
3923 | |
3924 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
3925 | cu_header->initial_length_size = bytes_read; | |
3926 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 3927 | info_ptr += bytes_read; |
107d2387 AC |
3928 | cu_header->version = read_2_bytes (abfd, info_ptr); |
3929 | info_ptr += 2; | |
b64f50a1 JK |
3930 | cu_header->abbrev_offset.sect_off = read_offset (abfd, info_ptr, cu_header, |
3931 | &bytes_read); | |
613e1657 | 3932 | info_ptr += bytes_read; |
107d2387 AC |
3933 | cu_header->addr_size = read_1_byte (abfd, info_ptr); |
3934 | info_ptr += 1; | |
3935 | signed_addr = bfd_get_sign_extend_vma (abfd); | |
3936 | if (signed_addr < 0) | |
8e65ff28 | 3937 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 3938 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 3939 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 3940 | |
107d2387 AC |
3941 | return info_ptr; |
3942 | } | |
3943 | ||
36586728 TT |
3944 | /* Helper function that returns the proper abbrev section for |
3945 | THIS_CU. */ | |
3946 | ||
3947 | static struct dwarf2_section_info * | |
3948 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
3949 | { | |
3950 | struct dwarf2_section_info *abbrev; | |
3951 | ||
3952 | if (this_cu->is_dwz) | |
3953 | abbrev = &dwarf2_get_dwz_file ()->abbrev; | |
3954 | else | |
3955 | abbrev = &dwarf2_per_objfile->abbrev; | |
3956 | ||
3957 | return abbrev; | |
3958 | } | |
3959 | ||
9ff913ba DE |
3960 | /* Subroutine of read_and_check_comp_unit_head and |
3961 | read_and_check_type_unit_head to simplify them. | |
3962 | Perform various error checking on the header. */ | |
3963 | ||
3964 | static void | |
3965 | error_check_comp_unit_head (struct comp_unit_head *header, | |
4bdcc0c1 DE |
3966 | struct dwarf2_section_info *section, |
3967 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba DE |
3968 | { |
3969 | bfd *abfd = section->asection->owner; | |
3970 | const char *filename = bfd_get_filename (abfd); | |
3971 | ||
3972 | if (header->version != 2 && header->version != 3 && header->version != 4) | |
3973 | error (_("Dwarf Error: wrong version in compilation unit header " | |
3974 | "(is %d, should be 2, 3, or 4) [in module %s]"), header->version, | |
3975 | filename); | |
3976 | ||
b64f50a1 | 3977 | if (header->abbrev_offset.sect_off |
36586728 | 3978 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9ff913ba DE |
3979 | error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header " |
3980 | "(offset 0x%lx + 6) [in module %s]"), | |
b64f50a1 | 3981 | (long) header->abbrev_offset.sect_off, (long) header->offset.sect_off, |
9ff913ba DE |
3982 | filename); |
3983 | ||
3984 | /* Cast to unsigned long to use 64-bit arithmetic when possible to | |
3985 | avoid potential 32-bit overflow. */ | |
1ce1cefd | 3986 | if (((unsigned long) header->offset.sect_off + get_cu_length (header)) |
9ff913ba DE |
3987 | > section->size) |
3988 | error (_("Dwarf Error: bad length (0x%lx) in compilation unit header " | |
3989 | "(offset 0x%lx + 0) [in module %s]"), | |
b64f50a1 | 3990 | (long) header->length, (long) header->offset.sect_off, |
9ff913ba DE |
3991 | filename); |
3992 | } | |
3993 | ||
3994 | /* Read in a CU/TU header and perform some basic error checking. | |
3995 | The contents of the header are stored in HEADER. | |
3996 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 3997 | |
d521ce57 | 3998 | static const gdb_byte * |
9ff913ba DE |
3999 | read_and_check_comp_unit_head (struct comp_unit_head *header, |
4000 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4001 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4002 | const gdb_byte *info_ptr, |
9ff913ba | 4003 | int is_debug_types_section) |
72bf9492 | 4004 | { |
d521ce57 | 4005 | const gdb_byte *beg_of_comp_unit = info_ptr; |
9ff913ba | 4006 | bfd *abfd = section->asection->owner; |
72bf9492 | 4007 | |
b64f50a1 | 4008 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
adabb602 | 4009 | |
72bf9492 DJ |
4010 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
4011 | ||
460c1c54 CC |
4012 | /* If we're reading a type unit, skip over the signature and |
4013 | type_offset fields. */ | |
b0df02fd | 4014 | if (is_debug_types_section) |
460c1c54 CC |
4015 | info_ptr += 8 /*signature*/ + header->offset_size; |
4016 | ||
b64f50a1 | 4017 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
adabb602 | 4018 | |
4bdcc0c1 | 4019 | error_check_comp_unit_head (header, section, abbrev_section); |
72bf9492 DJ |
4020 | |
4021 | return info_ptr; | |
4022 | } | |
4023 | ||
348e048f DE |
4024 | /* Read in the types comp unit header information from .debug_types entry at |
4025 | types_ptr. The result is a pointer to one past the end of the header. */ | |
4026 | ||
d521ce57 | 4027 | static const gdb_byte * |
9ff913ba DE |
4028 | read_and_check_type_unit_head (struct comp_unit_head *header, |
4029 | struct dwarf2_section_info *section, | |
4bdcc0c1 | 4030 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 4031 | const gdb_byte *info_ptr, |
dee91e82 DE |
4032 | ULONGEST *signature, |
4033 | cu_offset *type_offset_in_tu) | |
348e048f | 4034 | { |
d521ce57 | 4035 | const gdb_byte *beg_of_comp_unit = info_ptr; |
9ff913ba | 4036 | bfd *abfd = section->asection->owner; |
348e048f | 4037 | |
b64f50a1 | 4038 | header->offset.sect_off = beg_of_comp_unit - section->buffer; |
348e048f | 4039 | |
9ff913ba | 4040 | info_ptr = read_comp_unit_head (header, info_ptr, abfd); |
348e048f | 4041 | |
9ff913ba DE |
4042 | /* If we're reading a type unit, skip over the signature and |
4043 | type_offset fields. */ | |
4044 | if (signature != NULL) | |
4045 | *signature = read_8_bytes (abfd, info_ptr); | |
4046 | info_ptr += 8; | |
dee91e82 DE |
4047 | if (type_offset_in_tu != NULL) |
4048 | type_offset_in_tu->cu_off = read_offset_1 (abfd, info_ptr, | |
4049 | header->offset_size); | |
9ff913ba DE |
4050 | info_ptr += header->offset_size; |
4051 | ||
b64f50a1 | 4052 | header->first_die_offset.cu_off = info_ptr - beg_of_comp_unit; |
348e048f | 4053 | |
4bdcc0c1 | 4054 | error_check_comp_unit_head (header, section, abbrev_section); |
9ff913ba DE |
4055 | |
4056 | return info_ptr; | |
348e048f DE |
4057 | } |
4058 | ||
f4dc4d17 DE |
4059 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
4060 | ||
4061 | static sect_offset | |
4062 | read_abbrev_offset (struct dwarf2_section_info *section, | |
4063 | sect_offset offset) | |
4064 | { | |
4065 | bfd *abfd = section->asection->owner; | |
d521ce57 | 4066 | const gdb_byte *info_ptr; |
f4dc4d17 DE |
4067 | unsigned int length, initial_length_size, offset_size; |
4068 | sect_offset abbrev_offset; | |
4069 | ||
4070 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
4071 | info_ptr = section->buffer + offset.sect_off; | |
4072 | length = read_initial_length (abfd, info_ptr, &initial_length_size); | |
4073 | offset_size = initial_length_size == 4 ? 4 : 8; | |
4074 | info_ptr += initial_length_size + 2 /*version*/; | |
4075 | abbrev_offset.sect_off = read_offset_1 (abfd, info_ptr, offset_size); | |
4076 | return abbrev_offset; | |
4077 | } | |
4078 | ||
aaa75496 JB |
4079 | /* Allocate a new partial symtab for file named NAME and mark this new |
4080 | partial symtab as being an include of PST. */ | |
4081 | ||
4082 | static void | |
d521ce57 | 4083 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
4084 | struct objfile *objfile) |
4085 | { | |
4086 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
4087 | ||
fbd9ab74 JK |
4088 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
4089 | { | |
4090 | /* It shares objfile->objfile_obstack. */ | |
4091 | subpst->dirname = pst->dirname; | |
4092 | } | |
4093 | ||
aaa75496 JB |
4094 | subpst->section_offsets = pst->section_offsets; |
4095 | subpst->textlow = 0; | |
4096 | subpst->texthigh = 0; | |
4097 | ||
4098 | subpst->dependencies = (struct partial_symtab **) | |
4099 | obstack_alloc (&objfile->objfile_obstack, | |
4100 | sizeof (struct partial_symtab *)); | |
4101 | subpst->dependencies[0] = pst; | |
4102 | subpst->number_of_dependencies = 1; | |
4103 | ||
4104 | subpst->globals_offset = 0; | |
4105 | subpst->n_global_syms = 0; | |
4106 | subpst->statics_offset = 0; | |
4107 | subpst->n_static_syms = 0; | |
4108 | subpst->symtab = NULL; | |
4109 | subpst->read_symtab = pst->read_symtab; | |
4110 | subpst->readin = 0; | |
4111 | ||
4112 | /* No private part is necessary for include psymtabs. This property | |
4113 | can be used to differentiate between such include psymtabs and | |
10b3939b | 4114 | the regular ones. */ |
58a9656e | 4115 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
4116 | } |
4117 | ||
4118 | /* Read the Line Number Program data and extract the list of files | |
4119 | included by the source file represented by PST. Build an include | |
d85a05f0 | 4120 | partial symtab for each of these included files. */ |
aaa75496 JB |
4121 | |
4122 | static void | |
4123 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
4124 | struct die_info *die, |
4125 | struct partial_symtab *pst) | |
aaa75496 | 4126 | { |
d85a05f0 DJ |
4127 | struct line_header *lh = NULL; |
4128 | struct attribute *attr; | |
aaa75496 | 4129 | |
d85a05f0 DJ |
4130 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
4131 | if (attr) | |
3019eac3 | 4132 | lh = dwarf_decode_line_header (DW_UNSND (attr), cu); |
aaa75496 JB |
4133 | if (lh == NULL) |
4134 | return; /* No linetable, so no includes. */ | |
4135 | ||
c6da4cef | 4136 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */ |
f3f5162e | 4137 | dwarf_decode_lines (lh, pst->dirname, cu, pst, 1); |
aaa75496 JB |
4138 | |
4139 | free_line_header (lh); | |
4140 | } | |
4141 | ||
348e048f | 4142 | static hashval_t |
52dc124a | 4143 | hash_signatured_type (const void *item) |
348e048f | 4144 | { |
52dc124a | 4145 | const struct signatured_type *sig_type = item; |
9a619af0 | 4146 | |
348e048f | 4147 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 4148 | return sig_type->signature; |
348e048f DE |
4149 | } |
4150 | ||
4151 | static int | |
52dc124a | 4152 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f DE |
4153 | { |
4154 | const struct signatured_type *lhs = item_lhs; | |
4155 | const struct signatured_type *rhs = item_rhs; | |
9a619af0 | 4156 | |
348e048f DE |
4157 | return lhs->signature == rhs->signature; |
4158 | } | |
4159 | ||
1fd400ff TT |
4160 | /* Allocate a hash table for signatured types. */ |
4161 | ||
4162 | static htab_t | |
673bfd45 | 4163 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
4164 | { |
4165 | return htab_create_alloc_ex (41, | |
52dc124a DE |
4166 | hash_signatured_type, |
4167 | eq_signatured_type, | |
1fd400ff TT |
4168 | NULL, |
4169 | &objfile->objfile_obstack, | |
4170 | hashtab_obstack_allocate, | |
4171 | dummy_obstack_deallocate); | |
4172 | } | |
4173 | ||
d467dd73 | 4174 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
4175 | |
4176 | static int | |
d467dd73 | 4177 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff TT |
4178 | { |
4179 | struct signatured_type *sigt = *slot; | |
b4dd5633 | 4180 | struct signatured_type ***datap = datum; |
1fd400ff | 4181 | |
b4dd5633 | 4182 | **datap = sigt; |
1fd400ff TT |
4183 | ++*datap; |
4184 | ||
4185 | return 1; | |
4186 | } | |
4187 | ||
c88ee1f0 DE |
4188 | /* Create the hash table of all entries in the .debug_types |
4189 | (or .debug_types.dwo) section(s). | |
4190 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
4191 | otherwise it is NULL. | |
4192 | ||
4193 | The result is a pointer to the hash table or NULL if there are no types. | |
4194 | ||
4195 | Note: This function processes DWO files only, not DWP files. */ | |
348e048f | 4196 | |
3019eac3 DE |
4197 | static htab_t |
4198 | create_debug_types_hash_table (struct dwo_file *dwo_file, | |
4199 | VEC (dwarf2_section_info_def) *types) | |
348e048f | 4200 | { |
3019eac3 | 4201 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8b70b953 | 4202 | htab_t types_htab = NULL; |
8b70b953 TT |
4203 | int ix; |
4204 | struct dwarf2_section_info *section; | |
4bdcc0c1 | 4205 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4206 | |
3019eac3 DE |
4207 | if (VEC_empty (dwarf2_section_info_def, types)) |
4208 | return NULL; | |
348e048f | 4209 | |
4bdcc0c1 DE |
4210 | abbrev_section = (dwo_file != NULL |
4211 | ? &dwo_file->sections.abbrev | |
4212 | : &dwarf2_per_objfile->abbrev); | |
4213 | ||
09406207 DE |
4214 | if (dwarf2_read_debug) |
4215 | fprintf_unfiltered (gdb_stdlog, "Reading .debug_types%s for %s:\n", | |
4216 | dwo_file ? ".dwo" : "", | |
4217 | bfd_get_filename (abbrev_section->asection->owner)); | |
4218 | ||
8b70b953 | 4219 | for (ix = 0; |
3019eac3 | 4220 | VEC_iterate (dwarf2_section_info_def, types, ix, section); |
8b70b953 TT |
4221 | ++ix) |
4222 | { | |
3019eac3 | 4223 | bfd *abfd; |
d521ce57 | 4224 | const gdb_byte *info_ptr, *end_ptr; |
36586728 | 4225 | struct dwarf2_section_info *abbrev_section; |
348e048f | 4226 | |
8b70b953 TT |
4227 | dwarf2_read_section (objfile, section); |
4228 | info_ptr = section->buffer; | |
348e048f | 4229 | |
8b70b953 TT |
4230 | if (info_ptr == NULL) |
4231 | continue; | |
348e048f | 4232 | |
3019eac3 DE |
4233 | /* We can't set abfd until now because the section may be empty or |
4234 | not present, in which case section->asection will be NULL. */ | |
4235 | abfd = section->asection->owner; | |
4236 | ||
36586728 TT |
4237 | if (dwo_file) |
4238 | abbrev_section = &dwo_file->sections.abbrev; | |
4239 | else | |
4240 | abbrev_section = &dwarf2_per_objfile->abbrev; | |
4241 | ||
dee91e82 DE |
4242 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
4243 | because we don't need to read any dies: the signature is in the | |
4244 | header. */ | |
8b70b953 TT |
4245 | |
4246 | end_ptr = info_ptr + section->size; | |
4247 | while (info_ptr < end_ptr) | |
4248 | { | |
b64f50a1 | 4249 | sect_offset offset; |
3019eac3 | 4250 | cu_offset type_offset_in_tu; |
8b70b953 | 4251 | ULONGEST signature; |
52dc124a | 4252 | struct signatured_type *sig_type; |
3019eac3 | 4253 | struct dwo_unit *dwo_tu; |
8b70b953 | 4254 | void **slot; |
d521ce57 | 4255 | const gdb_byte *ptr = info_ptr; |
9ff913ba | 4256 | struct comp_unit_head header; |
dee91e82 | 4257 | unsigned int length; |
348e048f | 4258 | |
b64f50a1 | 4259 | offset.sect_off = ptr - section->buffer; |
348e048f | 4260 | |
8b70b953 | 4261 | /* We need to read the type's signature in order to build the hash |
9ff913ba | 4262 | table, but we don't need anything else just yet. */ |
348e048f | 4263 | |
4bdcc0c1 DE |
4264 | ptr = read_and_check_type_unit_head (&header, section, |
4265 | abbrev_section, ptr, | |
3019eac3 | 4266 | &signature, &type_offset_in_tu); |
6caca83c | 4267 | |
1ce1cefd | 4268 | length = get_cu_length (&header); |
dee91e82 | 4269 | |
6caca83c | 4270 | /* Skip dummy type units. */ |
dee91e82 DE |
4271 | if (ptr >= info_ptr + length |
4272 | || peek_abbrev_code (abfd, ptr) == 0) | |
6caca83c | 4273 | { |
1ce1cefd | 4274 | info_ptr += length; |
6caca83c CC |
4275 | continue; |
4276 | } | |
8b70b953 | 4277 | |
0349ea22 DE |
4278 | if (types_htab == NULL) |
4279 | { | |
4280 | if (dwo_file) | |
4281 | types_htab = allocate_dwo_unit_table (objfile); | |
4282 | else | |
4283 | types_htab = allocate_signatured_type_table (objfile); | |
4284 | } | |
4285 | ||
3019eac3 DE |
4286 | if (dwo_file) |
4287 | { | |
4288 | sig_type = NULL; | |
4289 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4290 | struct dwo_unit); | |
4291 | dwo_tu->dwo_file = dwo_file; | |
4292 | dwo_tu->signature = signature; | |
4293 | dwo_tu->type_offset_in_tu = type_offset_in_tu; | |
8a0459fd | 4294 | dwo_tu->section = section; |
3019eac3 DE |
4295 | dwo_tu->offset = offset; |
4296 | dwo_tu->length = length; | |
4297 | } | |
4298 | else | |
4299 | { | |
4300 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
4301 | The real type_offset is in the DWO file. */ | |
4302 | dwo_tu = NULL; | |
4303 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
4304 | struct signatured_type); | |
4305 | sig_type->signature = signature; | |
4306 | sig_type->type_offset_in_tu = type_offset_in_tu; | |
4307 | sig_type->per_cu.objfile = objfile; | |
4308 | sig_type->per_cu.is_debug_types = 1; | |
8a0459fd | 4309 | sig_type->per_cu.section = section; |
3019eac3 DE |
4310 | sig_type->per_cu.offset = offset; |
4311 | sig_type->per_cu.length = length; | |
4312 | } | |
8b70b953 | 4313 | |
3019eac3 DE |
4314 | slot = htab_find_slot (types_htab, |
4315 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
4316 | INSERT); | |
8b70b953 TT |
4317 | gdb_assert (slot != NULL); |
4318 | if (*slot != NULL) | |
4319 | { | |
3019eac3 DE |
4320 | sect_offset dup_offset; |
4321 | ||
4322 | if (dwo_file) | |
4323 | { | |
4324 | const struct dwo_unit *dup_tu = *slot; | |
4325 | ||
4326 | dup_offset = dup_tu->offset; | |
4327 | } | |
4328 | else | |
4329 | { | |
4330 | const struct signatured_type *dup_tu = *slot; | |
4331 | ||
4332 | dup_offset = dup_tu->per_cu.offset; | |
4333 | } | |
b3c8eb43 | 4334 | |
8b70b953 | 4335 | complaint (&symfile_complaints, |
c88ee1f0 | 4336 | _("debug type entry at offset 0x%x is duplicate to" |
4031ecc5 | 4337 | " the entry at offset 0x%x, signature %s"), |
3019eac3 | 4338 | offset.sect_off, dup_offset.sect_off, |
4031ecc5 | 4339 | hex_string (signature)); |
8b70b953 | 4340 | } |
3019eac3 | 4341 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; |
348e048f | 4342 | |
09406207 | 4343 | if (dwarf2_read_debug) |
4031ecc5 | 4344 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, signature %s\n", |
b64f50a1 | 4345 | offset.sect_off, |
4031ecc5 | 4346 | hex_string (signature)); |
348e048f | 4347 | |
dee91e82 | 4348 | info_ptr += length; |
8b70b953 | 4349 | } |
348e048f DE |
4350 | } |
4351 | ||
3019eac3 DE |
4352 | return types_htab; |
4353 | } | |
4354 | ||
4355 | /* Create the hash table of all entries in the .debug_types section, | |
4356 | and initialize all_type_units. | |
4357 | The result is zero if there is an error (e.g. missing .debug_types section), | |
4358 | otherwise non-zero. */ | |
4359 | ||
4360 | static int | |
4361 | create_all_type_units (struct objfile *objfile) | |
4362 | { | |
4363 | htab_t types_htab; | |
b4dd5633 | 4364 | struct signatured_type **iter; |
3019eac3 DE |
4365 | |
4366 | types_htab = create_debug_types_hash_table (NULL, dwarf2_per_objfile->types); | |
4367 | if (types_htab == NULL) | |
4368 | { | |
4369 | dwarf2_per_objfile->signatured_types = NULL; | |
4370 | return 0; | |
4371 | } | |
4372 | ||
348e048f DE |
4373 | dwarf2_per_objfile->signatured_types = types_htab; |
4374 | ||
d467dd73 DE |
4375 | dwarf2_per_objfile->n_type_units = htab_elements (types_htab); |
4376 | dwarf2_per_objfile->all_type_units | |
1fd400ff | 4377 | = obstack_alloc (&objfile->objfile_obstack, |
d467dd73 | 4378 | dwarf2_per_objfile->n_type_units |
b4dd5633 | 4379 | * sizeof (struct signatured_type *)); |
d467dd73 DE |
4380 | iter = &dwarf2_per_objfile->all_type_units[0]; |
4381 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, &iter); | |
4382 | gdb_assert (iter - &dwarf2_per_objfile->all_type_units[0] | |
4383 | == dwarf2_per_objfile->n_type_units); | |
1fd400ff | 4384 | |
348e048f DE |
4385 | return 1; |
4386 | } | |
4387 | ||
380bca97 | 4388 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
4389 | Returns NULL if signature SIG is not present in the table. |
4390 | It is up to the caller to complain about this. */ | |
348e048f DE |
4391 | |
4392 | static struct signatured_type * | |
e319fa28 | 4393 | lookup_signatured_type (ULONGEST sig) |
348e048f DE |
4394 | { |
4395 | struct signatured_type find_entry, *entry; | |
4396 | ||
4397 | if (dwarf2_per_objfile->signatured_types == NULL) | |
5a8b3f62 | 4398 | return NULL; |
348e048f DE |
4399 | find_entry.signature = sig; |
4400 | entry = htab_find (dwarf2_per_objfile->signatured_types, &find_entry); | |
4401 | return entry; | |
4402 | } | |
42e7ad6c DE |
4403 | \f |
4404 | /* Low level DIE reading support. */ | |
348e048f | 4405 | |
d85a05f0 DJ |
4406 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
4407 | ||
4408 | static void | |
4409 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 4410 | struct dwarf2_cu *cu, |
3019eac3 DE |
4411 | struct dwarf2_section_info *section, |
4412 | struct dwo_file *dwo_file) | |
d85a05f0 | 4413 | { |
fceca515 | 4414 | gdb_assert (section->readin && section->buffer != NULL); |
dee91e82 | 4415 | reader->abfd = section->asection->owner; |
d85a05f0 | 4416 | reader->cu = cu; |
3019eac3 | 4417 | reader->dwo_file = dwo_file; |
dee91e82 DE |
4418 | reader->die_section = section; |
4419 | reader->buffer = section->buffer; | |
f664829e | 4420 | reader->buffer_end = section->buffer + section->size; |
d85a05f0 DJ |
4421 | } |
4422 | ||
b0c7bfa9 DE |
4423 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
4424 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
4425 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
4426 | already. | |
4427 | ||
4428 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
4429 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
4430 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN | |
4431 | are filled in with the info of the DIE from the DWO file. | |
4432 | ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies | |
4433 | provided an abbrev table to use. | |
4434 | The result is non-zero if a valid (non-dummy) DIE was found. */ | |
4435 | ||
4436 | static int | |
4437 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
4438 | struct dwo_unit *dwo_unit, | |
4439 | int abbrev_table_provided, | |
4440 | struct die_info *stub_comp_unit_die, | |
4441 | struct die_reader_specs *result_reader, | |
d521ce57 | 4442 | const gdb_byte **result_info_ptr, |
b0c7bfa9 DE |
4443 | struct die_info **result_comp_unit_die, |
4444 | int *result_has_children) | |
4445 | { | |
4446 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
4447 | struct dwarf2_cu *cu = this_cu->cu; | |
4448 | struct dwarf2_section_info *section; | |
4449 | bfd *abfd; | |
d521ce57 | 4450 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
4451 | const char *comp_dir_string; |
4452 | ULONGEST signature; /* Or dwo_id. */ | |
4453 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; | |
4454 | int i,num_extra_attrs; | |
4455 | struct dwarf2_section_info *dwo_abbrev_section; | |
4456 | struct attribute *attr; | |
4457 | struct die_info *comp_unit_die; | |
4458 | ||
4459 | /* These attributes aren't processed until later: | |
4460 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
4461 | However, the attribute is found in the stub which we won't have later. | |
4462 | In order to not impose this complication on the rest of the code, | |
4463 | we read them here and copy them to the DWO CU/TU die. */ | |
4464 | ||
4465 | stmt_list = NULL; | |
4466 | low_pc = NULL; | |
4467 | high_pc = NULL; | |
4468 | ranges = NULL; | |
4469 | comp_dir = NULL; | |
4470 | ||
4471 | if (stub_comp_unit_die != NULL) | |
4472 | { | |
4473 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
4474 | DWO file. */ | |
4475 | if (! this_cu->is_debug_types) | |
4476 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
4477 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
4478 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
4479 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
4480 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
4481 | ||
4482 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
4483 | We need the value before we can process DW_FORM_GNU_addr_index. */ | |
4484 | cu->addr_base = 0; | |
4485 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
4486 | if (attr) | |
4487 | cu->addr_base = DW_UNSND (attr); | |
4488 | ||
4489 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
4490 | We need the value before we can process DW_AT_ranges. */ | |
4491 | cu->ranges_base = 0; | |
4492 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
4493 | if (attr) | |
4494 | cu->ranges_base = DW_UNSND (attr); | |
4495 | } | |
4496 | ||
4497 | /* Set up for reading the DWO CU/TU. */ | |
4498 | cu->dwo_unit = dwo_unit; | |
4499 | section = dwo_unit->section; | |
4500 | dwarf2_read_section (objfile, section); | |
4501 | abfd = section->asection->owner; | |
4502 | begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off; | |
4503 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; | |
4504 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file); | |
4505 | ||
4506 | if (this_cu->is_debug_types) | |
4507 | { | |
4508 | ULONGEST header_signature; | |
4509 | cu_offset type_offset_in_tu; | |
4510 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; | |
4511 | ||
4512 | info_ptr = read_and_check_type_unit_head (&cu->header, section, | |
4513 | dwo_abbrev_section, | |
4514 | info_ptr, | |
4515 | &header_signature, | |
4516 | &type_offset_in_tu); | |
4517 | gdb_assert (sig_type->signature == header_signature); | |
4518 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
4519 | /* For DWOs coming from DWP files, we don't know the CU length | |
4520 | nor the type's offset in the TU until now. */ | |
4521 | dwo_unit->length = get_cu_length (&cu->header); | |
4522 | dwo_unit->type_offset_in_tu = type_offset_in_tu; | |
4523 | ||
4524 | /* Establish the type offset that can be used to lookup the type. | |
4525 | For DWO files, we don't know it until now. */ | |
4526 | sig_type->type_offset_in_section.sect_off = | |
4527 | dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off; | |
4528 | } | |
4529 | else | |
4530 | { | |
4531 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, | |
4532 | dwo_abbrev_section, | |
4533 | info_ptr, 0); | |
4534 | gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off); | |
4535 | /* For DWOs coming from DWP files, we don't know the CU length | |
4536 | until now. */ | |
4537 | dwo_unit->length = get_cu_length (&cu->header); | |
4538 | } | |
4539 | ||
02142a6c DE |
4540 | /* Replace the CU's original abbrev table with the DWO's. |
4541 | Reminder: We can't read the abbrev table until we've read the header. */ | |
b0c7bfa9 DE |
4542 | if (abbrev_table_provided) |
4543 | { | |
4544 | /* Don't free the provided abbrev table, the caller of | |
4545 | init_cutu_and_read_dies owns it. */ | |
4546 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 4547 | /* Ensure the DWO abbrev table gets freed. */ |
b0c7bfa9 DE |
4548 | make_cleanup (dwarf2_free_abbrev_table, cu); |
4549 | } | |
4550 | else | |
4551 | { | |
4552 | dwarf2_free_abbrev_table (cu); | |
4553 | dwarf2_read_abbrevs (cu, dwo_abbrev_section); | |
02142a6c | 4554 | /* Leave any existing abbrev table cleanup as is. */ |
b0c7bfa9 DE |
4555 | } |
4556 | ||
4557 | /* Read in the die, but leave space to copy over the attributes | |
4558 | from the stub. This has the benefit of simplifying the rest of | |
4559 | the code - all the work to maintain the illusion of a single | |
4560 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
4561 | num_extra_attrs = ((stmt_list != NULL) | |
4562 | + (low_pc != NULL) | |
4563 | + (high_pc != NULL) | |
4564 | + (ranges != NULL) | |
4565 | + (comp_dir != NULL)); | |
4566 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
4567 | result_has_children, num_extra_attrs); | |
4568 | ||
4569 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
4570 | comp_unit_die = *result_comp_unit_die; | |
4571 | i = comp_unit_die->num_attrs; | |
4572 | if (stmt_list != NULL) | |
4573 | comp_unit_die->attrs[i++] = *stmt_list; | |
4574 | if (low_pc != NULL) | |
4575 | comp_unit_die->attrs[i++] = *low_pc; | |
4576 | if (high_pc != NULL) | |
4577 | comp_unit_die->attrs[i++] = *high_pc; | |
4578 | if (ranges != NULL) | |
4579 | comp_unit_die->attrs[i++] = *ranges; | |
4580 | if (comp_dir != NULL) | |
4581 | comp_unit_die->attrs[i++] = *comp_dir; | |
4582 | comp_unit_die->num_attrs += num_extra_attrs; | |
4583 | ||
bf6af496 DE |
4584 | if (dwarf2_die_debug) |
4585 | { | |
4586 | fprintf_unfiltered (gdb_stdlog, | |
4587 | "Read die from %s@0x%x of %s:\n", | |
4588 | bfd_section_name (abfd, section->asection), | |
4589 | (unsigned) (begin_info_ptr - section->buffer), | |
4590 | bfd_get_filename (abfd)); | |
4591 | dump_die (comp_unit_die, dwarf2_die_debug); | |
4592 | } | |
4593 | ||
b0c7bfa9 DE |
4594 | /* Skip dummy compilation units. */ |
4595 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
4596 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
4597 | return 0; | |
4598 | ||
4599 | *result_info_ptr = info_ptr; | |
4600 | return 1; | |
4601 | } | |
4602 | ||
4603 | /* Subroutine of init_cutu_and_read_dies to simplify it. | |
4604 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
4605 | If the specified DWO unit cannot be found an error is thrown. */ | |
4606 | ||
4607 | static struct dwo_unit * | |
4608 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
4609 | struct die_info *comp_unit_die) | |
4610 | { | |
4611 | struct dwarf2_cu *cu = this_cu->cu; | |
4612 | struct attribute *attr; | |
4613 | ULONGEST signature; | |
4614 | struct dwo_unit *dwo_unit; | |
4615 | const char *comp_dir, *dwo_name; | |
4616 | ||
4617 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ | |
4618 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); | |
4619 | gdb_assert (attr != NULL); | |
4620 | dwo_name = DW_STRING (attr); | |
4621 | comp_dir = NULL; | |
4622 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
4623 | if (attr) | |
4624 | comp_dir = DW_STRING (attr); | |
4625 | ||
4626 | if (this_cu->is_debug_types) | |
4627 | { | |
4628 | struct signatured_type *sig_type; | |
4629 | ||
4630 | /* Since this_cu is the first member of struct signatured_type, | |
4631 | we can go from a pointer to one to a pointer to the other. */ | |
4632 | sig_type = (struct signatured_type *) this_cu; | |
4633 | signature = sig_type->signature; | |
4634 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); | |
4635 | } | |
4636 | else | |
4637 | { | |
4638 | struct attribute *attr; | |
4639 | ||
4640 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
4641 | if (! attr) | |
4642 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" | |
4643 | " [in module %s]"), | |
4644 | dwo_name, this_cu->objfile->name); | |
4645 | signature = DW_UNSND (attr); | |
4646 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, | |
4647 | signature); | |
4648 | } | |
4649 | ||
4650 | if (dwo_unit == NULL) | |
4651 | { | |
4652 | error (_("Dwarf Error: CU at offset 0x%x references unknown DWO" | |
4653 | " with ID %s [in module %s]"), | |
4031ecc5 | 4654 | this_cu->offset.sect_off, hex_string (signature), |
b0c7bfa9 DE |
4655 | this_cu->objfile->name); |
4656 | } | |
4657 | ||
4658 | return dwo_unit; | |
4659 | } | |
4660 | ||
fd820528 | 4661 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 4662 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 4663 | |
f4dc4d17 DE |
4664 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
4665 | Otherwise the table specified in the comp unit header is read in and used. | |
4666 | This is an optimization for when we already have the abbrev table. | |
4667 | ||
dee91e82 DE |
4668 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
4669 | Otherwise, a new CU is allocated with xmalloc. | |
4670 | ||
4671 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
4672 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
4673 | ||
4674 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 4675 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 4676 | |
70221824 | 4677 | static void |
fd820528 | 4678 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 4679 | struct abbrev_table *abbrev_table, |
fd820528 DE |
4680 | int use_existing_cu, int keep, |
4681 | die_reader_func_ftype *die_reader_func, | |
4682 | void *data) | |
c906108c | 4683 | { |
dee91e82 | 4684 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 4685 | struct dwarf2_section_info *section = this_cu->section; |
3019eac3 | 4686 | bfd *abfd = section->asection->owner; |
dee91e82 | 4687 | struct dwarf2_cu *cu; |
d521ce57 | 4688 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 4689 | struct die_reader_specs reader; |
d85a05f0 | 4690 | struct die_info *comp_unit_die; |
dee91e82 | 4691 | int has_children; |
d85a05f0 | 4692 | struct attribute *attr; |
dee91e82 DE |
4693 | struct cleanup *cleanups, *free_cu_cleanup = NULL; |
4694 | struct signatured_type *sig_type = NULL; | |
4bdcc0c1 | 4695 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
4696 | /* Non-zero if CU currently points to a DWO file and we need to |
4697 | reread it. When this happens we need to reread the skeleton die | |
4698 | before we can reread the DWO file. */ | |
4699 | int rereading_dwo_cu = 0; | |
c906108c | 4700 | |
09406207 DE |
4701 | if (dwarf2_die_debug) |
4702 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4703 | this_cu->is_debug_types ? "type" : "comp", | |
4704 | this_cu->offset.sect_off); | |
4705 | ||
dee91e82 DE |
4706 | if (use_existing_cu) |
4707 | gdb_assert (keep); | |
23745b47 | 4708 | |
dee91e82 DE |
4709 | cleanups = make_cleanup (null_cleanup, NULL); |
4710 | ||
4711 | /* This is cheap if the section is already read in. */ | |
4712 | dwarf2_read_section (objfile, section); | |
4713 | ||
4714 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
36586728 TT |
4715 | |
4716 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
4717 | |
4718 | if (use_existing_cu && this_cu->cu != NULL) | |
4719 | { | |
4720 | cu = this_cu->cu; | |
42e7ad6c DE |
4721 | |
4722 | /* If this CU is from a DWO file we need to start over, we need to | |
4723 | refetch the attributes from the skeleton CU. | |
4724 | This could be optimized by retrieving those attributes from when we | |
4725 | were here the first time: the previous comp_unit_die was stored in | |
4726 | comp_unit_obstack. But there's no data yet that we need this | |
4727 | optimization. */ | |
4728 | if (cu->dwo_unit != NULL) | |
4729 | rereading_dwo_cu = 1; | |
dee91e82 DE |
4730 | } |
4731 | else | |
4732 | { | |
4733 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
4734 | gdb_assert (this_cu->cu == NULL); | |
4735 | ||
4736 | cu = xmalloc (sizeof (*cu)); | |
4737 | init_one_comp_unit (cu, this_cu); | |
4738 | ||
4739 | /* If an error occurs while loading, release our storage. */ | |
4740 | free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu); | |
42e7ad6c | 4741 | } |
dee91e82 | 4742 | |
b0c7bfa9 | 4743 | /* Get the header. */ |
42e7ad6c DE |
4744 | if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu) |
4745 | { | |
4746 | /* We already have the header, there's no need to read it in again. */ | |
4747 | info_ptr += cu->header.first_die_offset.cu_off; | |
4748 | } | |
4749 | else | |
4750 | { | |
3019eac3 | 4751 | if (this_cu->is_debug_types) |
dee91e82 DE |
4752 | { |
4753 | ULONGEST signature; | |
42e7ad6c | 4754 | cu_offset type_offset_in_tu; |
dee91e82 | 4755 | |
4bdcc0c1 DE |
4756 | info_ptr = read_and_check_type_unit_head (&cu->header, section, |
4757 | abbrev_section, info_ptr, | |
42e7ad6c DE |
4758 | &signature, |
4759 | &type_offset_in_tu); | |
dee91e82 | 4760 | |
42e7ad6c DE |
4761 | /* Since per_cu is the first member of struct signatured_type, |
4762 | we can go from a pointer to one to a pointer to the other. */ | |
4763 | sig_type = (struct signatured_type *) this_cu; | |
4764 | gdb_assert (sig_type->signature == signature); | |
4765 | gdb_assert (sig_type->type_offset_in_tu.cu_off | |
4766 | == type_offset_in_tu.cu_off); | |
dee91e82 DE |
4767 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); |
4768 | ||
42e7ad6c DE |
4769 | /* LENGTH has not been set yet for type units if we're |
4770 | using .gdb_index. */ | |
1ce1cefd | 4771 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
4772 | |
4773 | /* Establish the type offset that can be used to lookup the type. */ | |
4774 | sig_type->type_offset_in_section.sect_off = | |
4775 | this_cu->offset.sect_off + sig_type->type_offset_in_tu.cu_off; | |
dee91e82 DE |
4776 | } |
4777 | else | |
4778 | { | |
4bdcc0c1 DE |
4779 | info_ptr = read_and_check_comp_unit_head (&cu->header, section, |
4780 | abbrev_section, | |
4781 | info_ptr, 0); | |
dee91e82 DE |
4782 | |
4783 | gdb_assert (this_cu->offset.sect_off == cu->header.offset.sect_off); | |
1ce1cefd | 4784 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
dee91e82 DE |
4785 | } |
4786 | } | |
10b3939b | 4787 | |
6caca83c | 4788 | /* Skip dummy compilation units. */ |
dee91e82 | 4789 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c CC |
4790 | || peek_abbrev_code (abfd, info_ptr) == 0) |
4791 | { | |
dee91e82 | 4792 | do_cleanups (cleanups); |
21b2bd31 | 4793 | return; |
6caca83c CC |
4794 | } |
4795 | ||
433df2d4 DE |
4796 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
4797 | And if we need to read them now, make sure they're freed when we're | |
42e7ad6c DE |
4798 | done. Note that it's important that if the CU had an abbrev table |
4799 | on entry we don't free it when we're done: Somewhere up the call stack | |
4800 | it may be in use. */ | |
f4dc4d17 DE |
4801 | if (abbrev_table != NULL) |
4802 | { | |
4803 | gdb_assert (cu->abbrev_table == NULL); | |
4804 | gdb_assert (cu->header.abbrev_offset.sect_off | |
4805 | == abbrev_table->offset.sect_off); | |
4806 | cu->abbrev_table = abbrev_table; | |
4807 | } | |
4808 | else if (cu->abbrev_table == NULL) | |
dee91e82 | 4809 | { |
4bdcc0c1 | 4810 | dwarf2_read_abbrevs (cu, abbrev_section); |
dee91e82 DE |
4811 | make_cleanup (dwarf2_free_abbrev_table, cu); |
4812 | } | |
42e7ad6c DE |
4813 | else if (rereading_dwo_cu) |
4814 | { | |
4815 | dwarf2_free_abbrev_table (cu); | |
4816 | dwarf2_read_abbrevs (cu, abbrev_section); | |
4817 | } | |
af703f96 | 4818 | |
dee91e82 | 4819 | /* Read the top level CU/TU die. */ |
3019eac3 | 4820 | init_cu_die_reader (&reader, cu, section, NULL); |
dee91e82 | 4821 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 4822 | |
b0c7bfa9 DE |
4823 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
4824 | from the DWO file. | |
4825 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a | |
4826 | DWO CU, that this test will fail (the attribute will not be present). */ | |
3019eac3 DE |
4827 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu); |
4828 | if (attr) | |
4829 | { | |
3019eac3 | 4830 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 4831 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
4832 | |
4833 | if (has_children) | |
4834 | error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name" | |
4835 | " has children (offset 0x%x) [in module %s]"), | |
4836 | this_cu->offset.sect_off, bfd_get_filename (abfd)); | |
b0c7bfa9 DE |
4837 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
4838 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, | |
4839 | abbrev_table != NULL, | |
4840 | comp_unit_die, | |
4841 | &reader, &info_ptr, | |
4842 | &dwo_comp_unit_die, &has_children) == 0) | |
3019eac3 | 4843 | { |
b0c7bfa9 | 4844 | /* Dummy die. */ |
3019eac3 DE |
4845 | do_cleanups (cleanups); |
4846 | return; | |
4847 | } | |
b0c7bfa9 | 4848 | comp_unit_die = dwo_comp_unit_die; |
3019eac3 DE |
4849 | } |
4850 | ||
b0c7bfa9 | 4851 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
4852 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
4853 | ||
b0c7bfa9 | 4854 | /* Done, clean up. */ |
dee91e82 | 4855 | if (free_cu_cleanup != NULL) |
348e048f | 4856 | { |
dee91e82 DE |
4857 | if (keep) |
4858 | { | |
4859 | /* We've successfully allocated this compilation unit. Let our | |
4860 | caller clean it up when finished with it. */ | |
4861 | discard_cleanups (free_cu_cleanup); | |
4862 | ||
4863 | /* We can only discard free_cu_cleanup and all subsequent cleanups. | |
4864 | So we have to manually free the abbrev table. */ | |
4865 | dwarf2_free_abbrev_table (cu); | |
4866 | ||
4867 | /* Link this CU into read_in_chain. */ | |
4868 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
4869 | dwarf2_per_objfile->read_in_chain = this_cu; | |
4870 | } | |
4871 | else | |
4872 | do_cleanups (free_cu_cleanup); | |
348e048f | 4873 | } |
dee91e82 DE |
4874 | |
4875 | do_cleanups (cleanups); | |
4876 | } | |
4877 | ||
3019eac3 DE |
4878 | /* Read CU/TU THIS_CU in section SECTION, |
4879 | but do not follow DW_AT_GNU_dwo_name if present. | |
80626a55 DE |
4880 | DWOP_FILE, if non-NULL, is the DWO/DWP file to read (the caller is assumed |
4881 | to have already done the lookup to find the DWO/DWP file). | |
dee91e82 DE |
4882 | |
4883 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 4884 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
4885 | |
4886 | We fill in THIS_CU->length. | |
4887 | ||
4888 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
4889 | linker) then DIE_READER_FUNC will not get called. | |
4890 | ||
4891 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4892 | This is done in order to not leave THIS_CU->cu in a state where we have |
4893 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
4894 | |
4895 | static void | |
4896 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
4897 | struct dwarf2_section_info *abbrev_section, | |
3019eac3 | 4898 | struct dwo_file *dwo_file, |
dee91e82 DE |
4899 | die_reader_func_ftype *die_reader_func, |
4900 | void *data) | |
4901 | { | |
4902 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8a0459fd | 4903 | struct dwarf2_section_info *section = this_cu->section; |
3019eac3 | 4904 | bfd *abfd = section->asection->owner; |
dee91e82 | 4905 | struct dwarf2_cu cu; |
d521ce57 | 4906 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 DE |
4907 | struct die_reader_specs reader; |
4908 | struct cleanup *cleanups; | |
4909 | struct die_info *comp_unit_die; | |
4910 | int has_children; | |
4911 | ||
09406207 DE |
4912 | if (dwarf2_die_debug) |
4913 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset 0x%x\n", | |
4914 | this_cu->is_debug_types ? "type" : "comp", | |
4915 | this_cu->offset.sect_off); | |
4916 | ||
dee91e82 DE |
4917 | gdb_assert (this_cu->cu == NULL); |
4918 | ||
dee91e82 DE |
4919 | /* This is cheap if the section is already read in. */ |
4920 | dwarf2_read_section (objfile, section); | |
4921 | ||
4922 | init_one_comp_unit (&cu, this_cu); | |
4923 | ||
4924 | cleanups = make_cleanup (free_stack_comp_unit, &cu); | |
4925 | ||
4926 | begin_info_ptr = info_ptr = section->buffer + this_cu->offset.sect_off; | |
4bdcc0c1 DE |
4927 | info_ptr = read_and_check_comp_unit_head (&cu.header, section, |
4928 | abbrev_section, info_ptr, | |
3019eac3 | 4929 | this_cu->is_debug_types); |
dee91e82 | 4930 | |
1ce1cefd | 4931 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
4932 | |
4933 | /* Skip dummy compilation units. */ | |
4934 | if (info_ptr >= begin_info_ptr + this_cu->length | |
4935 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c906108c | 4936 | { |
dee91e82 | 4937 | do_cleanups (cleanups); |
21b2bd31 | 4938 | return; |
93311388 | 4939 | } |
72bf9492 | 4940 | |
dee91e82 DE |
4941 | dwarf2_read_abbrevs (&cu, abbrev_section); |
4942 | make_cleanup (dwarf2_free_abbrev_table, &cu); | |
4943 | ||
3019eac3 | 4944 | init_cu_die_reader (&reader, &cu, section, dwo_file); |
dee91e82 DE |
4945 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
4946 | ||
4947 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
4948 | ||
4949 | do_cleanups (cleanups); | |
4950 | } | |
4951 | ||
3019eac3 DE |
4952 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
4953 | does not lookup the specified DWO file. | |
4954 | This cannot be used to read DWO files. | |
dee91e82 DE |
4955 | |
4956 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
4957 | This is done in order to not leave THIS_CU->cu in a state where we have |
4958 | to care whether it refers to the "main" CU or the DWO CU. | |
4959 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
4960 | |
4961 | static void | |
4962 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
4963 | die_reader_func_ftype *die_reader_func, | |
4964 | void *data) | |
4965 | { | |
4966 | init_cutu_and_read_dies_no_follow (this_cu, | |
36586728 | 4967 | get_abbrev_section_for_cu (this_cu), |
3019eac3 | 4968 | NULL, |
dee91e82 DE |
4969 | die_reader_func, data); |
4970 | } | |
0018ea6f DE |
4971 | \f |
4972 | /* Type Unit Groups. | |
dee91e82 | 4973 | |
0018ea6f DE |
4974 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
4975 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
4976 | so that all types coming from the same compilation (.o file) are grouped | |
4977 | together. A future step could be to put the types in the same symtab as | |
4978 | the CU the types ultimately came from. */ | |
ff013f42 | 4979 | |
f4dc4d17 DE |
4980 | static hashval_t |
4981 | hash_type_unit_group (const void *item) | |
4982 | { | |
094b34ac | 4983 | const struct type_unit_group *tu_group = item; |
f4dc4d17 | 4984 | |
094b34ac | 4985 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 4986 | } |
348e048f DE |
4987 | |
4988 | static int | |
f4dc4d17 | 4989 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 4990 | { |
f4dc4d17 DE |
4991 | const struct type_unit_group *lhs = item_lhs; |
4992 | const struct type_unit_group *rhs = item_rhs; | |
348e048f | 4993 | |
094b34ac | 4994 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 4995 | } |
348e048f | 4996 | |
f4dc4d17 DE |
4997 | /* Allocate a hash table for type unit groups. */ |
4998 | ||
4999 | static htab_t | |
5000 | allocate_type_unit_groups_table (void) | |
5001 | { | |
5002 | return htab_create_alloc_ex (3, | |
5003 | hash_type_unit_group, | |
5004 | eq_type_unit_group, | |
5005 | NULL, | |
5006 | &dwarf2_per_objfile->objfile->objfile_obstack, | |
5007 | hashtab_obstack_allocate, | |
5008 | dummy_obstack_deallocate); | |
5009 | } | |
dee91e82 | 5010 | |
f4dc4d17 DE |
5011 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
5012 | partial symtabs. We combine several TUs per psymtab to not let the size | |
5013 | of any one psymtab grow too big. */ | |
5014 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
5015 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 5016 | |
094b34ac | 5017 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
5018 | Create the type_unit_group object used to hold one or more TUs. */ |
5019 | ||
5020 | static struct type_unit_group * | |
094b34ac | 5021 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 DE |
5022 | { |
5023 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
094b34ac | 5024 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 5025 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
5026 | |
5027 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5028 | struct type_unit_group); | |
094b34ac | 5029 | per_cu = &tu_group->per_cu; |
f4dc4d17 | 5030 | per_cu->objfile = objfile; |
f4dc4d17 | 5031 | |
094b34ac DE |
5032 | if (dwarf2_per_objfile->using_index) |
5033 | { | |
5034 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
5035 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
5036 | } |
5037 | else | |
5038 | { | |
5039 | unsigned int line_offset = line_offset_struct.sect_off; | |
5040 | struct partial_symtab *pst; | |
5041 | char *name; | |
5042 | ||
5043 | /* Give the symtab a useful name for debug purposes. */ | |
5044 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
5045 | name = xstrprintf ("<type_units_%d>", | |
5046 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
5047 | else | |
5048 | name = xstrprintf ("<type_units_at_0x%x>", line_offset); | |
5049 | ||
5050 | pst = create_partial_symtab (per_cu, name); | |
5051 | pst->anonymous = 1; | |
f4dc4d17 | 5052 | |
094b34ac DE |
5053 | xfree (name); |
5054 | } | |
f4dc4d17 | 5055 | |
094b34ac DE |
5056 | tu_group->hash.dwo_unit = cu->dwo_unit; |
5057 | tu_group->hash.line_offset = line_offset_struct; | |
f4dc4d17 DE |
5058 | |
5059 | return tu_group; | |
5060 | } | |
5061 | ||
094b34ac DE |
5062 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
5063 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
5064 | |
5065 | static struct type_unit_group * | |
094b34ac | 5066 | get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list) |
f4dc4d17 DE |
5067 | { |
5068 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5069 | struct type_unit_group *tu_group; | |
5070 | void **slot; | |
5071 | unsigned int line_offset; | |
5072 | struct type_unit_group type_unit_group_for_lookup; | |
5073 | ||
5074 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
5075 | { | |
5076 | dwarf2_per_objfile->type_unit_groups = | |
5077 | allocate_type_unit_groups_table (); | |
5078 | } | |
5079 | ||
5080 | /* Do we need to create a new group, or can we use an existing one? */ | |
5081 | ||
5082 | if (stmt_list) | |
5083 | { | |
5084 | line_offset = DW_UNSND (stmt_list); | |
5085 | ++tu_stats->nr_symtab_sharers; | |
5086 | } | |
5087 | else | |
5088 | { | |
5089 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
5090 | We can do various things here like create one group per TU or | |
5091 | spread them over multiple groups to split up the expansion work. | |
5092 | To avoid worst case scenarios (too many groups or too large groups) | |
5093 | we, umm, group them in bunches. */ | |
5094 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
5095 | | (tu_stats->nr_stmt_less_type_units | |
5096 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
5097 | ++tu_stats->nr_stmt_less_type_units; | |
5098 | } | |
5099 | ||
094b34ac DE |
5100 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
5101 | type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset; | |
f4dc4d17 DE |
5102 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
5103 | &type_unit_group_for_lookup, INSERT); | |
5104 | if (*slot != NULL) | |
5105 | { | |
5106 | tu_group = *slot; | |
5107 | gdb_assert (tu_group != NULL); | |
5108 | } | |
5109 | else | |
5110 | { | |
5111 | sect_offset line_offset_struct; | |
5112 | ||
5113 | line_offset_struct.sect_off = line_offset; | |
094b34ac | 5114 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
5115 | *slot = tu_group; |
5116 | ++tu_stats->nr_symtabs; | |
5117 | } | |
5118 | ||
5119 | return tu_group; | |
5120 | } | |
5121 | ||
5122 | /* Struct used to sort TUs by their abbreviation table offset. */ | |
5123 | ||
5124 | struct tu_abbrev_offset | |
5125 | { | |
5126 | struct signatured_type *sig_type; | |
5127 | sect_offset abbrev_offset; | |
5128 | }; | |
5129 | ||
5130 | /* Helper routine for build_type_unit_groups, passed to qsort. */ | |
5131 | ||
5132 | static int | |
5133 | sort_tu_by_abbrev_offset (const void *ap, const void *bp) | |
5134 | { | |
5135 | const struct tu_abbrev_offset * const *a = ap; | |
5136 | const struct tu_abbrev_offset * const *b = bp; | |
5137 | unsigned int aoff = (*a)->abbrev_offset.sect_off; | |
5138 | unsigned int boff = (*b)->abbrev_offset.sect_off; | |
5139 | ||
5140 | return (aoff > boff) - (aoff < boff); | |
5141 | } | |
5142 | ||
5143 | /* A helper function to add a type_unit_group to a table. */ | |
5144 | ||
5145 | static int | |
5146 | add_type_unit_group_to_table (void **slot, void *datum) | |
5147 | { | |
5148 | struct type_unit_group *tu_group = *slot; | |
5149 | struct type_unit_group ***datap = datum; | |
5150 | ||
5151 | **datap = tu_group; | |
5152 | ++*datap; | |
5153 | ||
5154 | return 1; | |
5155 | } | |
5156 | ||
5157 | /* Efficiently read all the type units, calling init_cutu_and_read_dies on | |
5158 | each one passing FUNC,DATA. | |
5159 | ||
5160 | The efficiency is because we sort TUs by the abbrev table they use and | |
5161 | only read each abbrev table once. In one program there are 200K TUs | |
5162 | sharing 8K abbrev tables. | |
5163 | ||
5164 | The main purpose of this function is to support building the | |
5165 | dwarf2_per_objfile->type_unit_groups table. | |
5166 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
5167 | can collapse the search space by grouping them by stmt_list. | |
5168 | The savings can be significant, in the same program from above the 200K TUs | |
5169 | share 8K stmt_list tables. | |
5170 | ||
5171 | FUNC is expected to call get_type_unit_group, which will create the | |
5172 | struct type_unit_group if necessary and add it to | |
5173 | dwarf2_per_objfile->type_unit_groups. */ | |
5174 | ||
5175 | static void | |
5176 | build_type_unit_groups (die_reader_func_ftype *func, void *data) | |
5177 | { | |
5178 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5179 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
5180 | struct cleanup *cleanups; | |
5181 | struct abbrev_table *abbrev_table; | |
5182 | sect_offset abbrev_offset; | |
5183 | struct tu_abbrev_offset *sorted_by_abbrev; | |
5184 | struct type_unit_group **iter; | |
5185 | int i; | |
5186 | ||
5187 | /* It's up to the caller to not call us multiple times. */ | |
5188 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
5189 | ||
5190 | if (dwarf2_per_objfile->n_type_units == 0) | |
5191 | return; | |
5192 | ||
5193 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
5194 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
5195 | read each abbrev table in. | |
5196 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
5197 | This is simpler and efficient enough for now. | |
5198 | ||
5199 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
5200 | symtab to use). Typically TUs with the same abbrev offset have the same | |
5201 | stmt_list value too so in practice this should work well. | |
5202 | ||
5203 | The basic algorithm here is: | |
5204 | ||
5205 | sort TUs by abbrev table | |
5206 | for each TU with same abbrev table: | |
5207 | read abbrev table if first user | |
5208 | read TU top level DIE | |
5209 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
5210 | call FUNC */ | |
5211 | ||
5212 | if (dwarf2_read_debug) | |
5213 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); | |
5214 | ||
5215 | /* Sort in a separate table to maintain the order of all_type_units | |
5216 | for .gdb_index: TU indices directly index all_type_units. */ | |
5217 | sorted_by_abbrev = XNEWVEC (struct tu_abbrev_offset, | |
5218 | dwarf2_per_objfile->n_type_units); | |
5219 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5220 | { | |
5221 | struct signatured_type *sig_type = dwarf2_per_objfile->all_type_units[i]; | |
5222 | ||
5223 | sorted_by_abbrev[i].sig_type = sig_type; | |
5224 | sorted_by_abbrev[i].abbrev_offset = | |
8a0459fd | 5225 | read_abbrev_offset (sig_type->per_cu.section, |
f4dc4d17 DE |
5226 | sig_type->per_cu.offset); |
5227 | } | |
5228 | cleanups = make_cleanup (xfree, sorted_by_abbrev); | |
5229 | qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units, | |
5230 | sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset); | |
5231 | ||
094b34ac DE |
5232 | /* Note: In the .gdb_index case, get_type_unit_group may have already been |
5233 | called any number of times, so we don't reset tu_stats here. */ | |
5234 | ||
f4dc4d17 DE |
5235 | abbrev_offset.sect_off = ~(unsigned) 0; |
5236 | abbrev_table = NULL; | |
5237 | make_cleanup (abbrev_table_free_cleanup, &abbrev_table); | |
5238 | ||
5239 | for (i = 0; i < dwarf2_per_objfile->n_type_units; ++i) | |
5240 | { | |
5241 | const struct tu_abbrev_offset *tu = &sorted_by_abbrev[i]; | |
5242 | ||
5243 | /* Switch to the next abbrev table if necessary. */ | |
5244 | if (abbrev_table == NULL | |
5245 | || tu->abbrev_offset.sect_off != abbrev_offset.sect_off) | |
5246 | { | |
5247 | if (abbrev_table != NULL) | |
5248 | { | |
5249 | abbrev_table_free (abbrev_table); | |
5250 | /* Reset to NULL in case abbrev_table_read_table throws | |
5251 | an error: abbrev_table_free_cleanup will get called. */ | |
5252 | abbrev_table = NULL; | |
5253 | } | |
5254 | abbrev_offset = tu->abbrev_offset; | |
5255 | abbrev_table = | |
5256 | abbrev_table_read_table (&dwarf2_per_objfile->abbrev, | |
5257 | abbrev_offset); | |
5258 | ++tu_stats->nr_uniq_abbrev_tables; | |
5259 | } | |
5260 | ||
5261 | init_cutu_and_read_dies (&tu->sig_type->per_cu, abbrev_table, 0, 0, | |
5262 | func, data); | |
5263 | } | |
5264 | ||
5265 | /* Create a vector of pointers to primary type units to make it easy to | |
5266 | iterate over them and CUs. See dw2_get_primary_cu. */ | |
5267 | dwarf2_per_objfile->n_type_unit_groups = | |
5268 | htab_elements (dwarf2_per_objfile->type_unit_groups); | |
5269 | dwarf2_per_objfile->all_type_unit_groups = | |
5270 | obstack_alloc (&objfile->objfile_obstack, | |
5271 | dwarf2_per_objfile->n_type_unit_groups | |
5272 | * sizeof (struct type_unit_group *)); | |
5273 | iter = &dwarf2_per_objfile->all_type_unit_groups[0]; | |
5274 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5275 | add_type_unit_group_to_table, &iter); | |
5276 | gdb_assert (iter - &dwarf2_per_objfile->all_type_unit_groups[0] | |
5277 | == dwarf2_per_objfile->n_type_unit_groups); | |
5278 | ||
5279 | do_cleanups (cleanups); | |
5280 | ||
5281 | if (dwarf2_read_debug) | |
5282 | { | |
5283 | fprintf_unfiltered (gdb_stdlog, "Done building type unit groups:\n"); | |
5284 | fprintf_unfiltered (gdb_stdlog, " %d TUs\n", | |
5285 | dwarf2_per_objfile->n_type_units); | |
5286 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", | |
5287 | tu_stats->nr_uniq_abbrev_tables); | |
5288 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
5289 | tu_stats->nr_symtabs); | |
5290 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
5291 | tu_stats->nr_symtab_sharers); | |
5292 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
5293 | tu_stats->nr_stmt_less_type_units); | |
5294 | } | |
5295 | } | |
0018ea6f DE |
5296 | \f |
5297 | /* Partial symbol tables. */ | |
5298 | ||
5299 | /* Create a psymtab named NAME and assign it to PER_CU. | |
5300 | ||
5301 | The caller must fill in the following details: | |
5302 | dirname, textlow, texthigh. */ | |
5303 | ||
5304 | static struct partial_symtab * | |
5305 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
5306 | { | |
5307 | struct objfile *objfile = per_cu->objfile; | |
5308 | struct partial_symtab *pst; | |
5309 | ||
5310 | pst = start_psymtab_common (objfile, objfile->section_offsets, | |
5311 | name, 0, | |
5312 | objfile->global_psymbols.next, | |
5313 | objfile->static_psymbols.next); | |
5314 | ||
5315 | pst->psymtabs_addrmap_supported = 1; | |
5316 | ||
5317 | /* This is the glue that links PST into GDB's symbol API. */ | |
5318 | pst->read_symtab_private = per_cu; | |
5319 | pst->read_symtab = dwarf2_read_symtab; | |
5320 | per_cu->v.psymtab = pst; | |
5321 | ||
5322 | return pst; | |
5323 | } | |
5324 | ||
5325 | /* die_reader_func for process_psymtab_comp_unit. */ | |
5326 | ||
5327 | static void | |
5328 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5329 | const gdb_byte *info_ptr, |
0018ea6f DE |
5330 | struct die_info *comp_unit_die, |
5331 | int has_children, | |
5332 | void *data) | |
5333 | { | |
5334 | struct dwarf2_cu *cu = reader->cu; | |
5335 | struct objfile *objfile = cu->objfile; | |
5336 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
5337 | struct attribute *attr; | |
5338 | CORE_ADDR baseaddr; | |
5339 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
5340 | struct partial_symtab *pst; | |
5341 | int has_pc_info; | |
5342 | const char *filename; | |
5343 | int *want_partial_unit_ptr = data; | |
5344 | ||
5345 | if (comp_unit_die->tag == DW_TAG_partial_unit | |
5346 | && (want_partial_unit_ptr == NULL | |
5347 | || !*want_partial_unit_ptr)) | |
5348 | return; | |
5349 | ||
5350 | gdb_assert (! per_cu->is_debug_types); | |
5351 | ||
5352 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); | |
5353 | ||
5354 | cu->list_in_scope = &file_symbols; | |
5355 | ||
5356 | /* Allocate a new partial symbol table structure. */ | |
5357 | attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu); | |
5358 | if (attr == NULL || !DW_STRING (attr)) | |
5359 | filename = ""; | |
5360 | else | |
5361 | filename = DW_STRING (attr); | |
5362 | ||
5363 | pst = create_partial_symtab (per_cu, filename); | |
5364 | ||
5365 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
5366 | attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu); | |
5367 | if (attr != NULL) | |
5368 | pst->dirname = DW_STRING (attr); | |
5369 | ||
5370 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
5371 | ||
5372 | dwarf2_find_base_address (comp_unit_die, cu); | |
5373 | ||
5374 | /* Possibly set the default values of LOWPC and HIGHPC from | |
5375 | `DW_AT_ranges'. */ | |
5376 | has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, | |
5377 | &best_highpc, cu, pst); | |
5378 | if (has_pc_info == 1 && best_lowpc < best_highpc) | |
5379 | /* Store the contiguous range if it is not empty; it can be empty for | |
5380 | CUs with no code. */ | |
5381 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
5382 | best_lowpc + baseaddr, | |
5383 | best_highpc + baseaddr - 1, pst); | |
5384 | ||
5385 | /* Check if comp unit has_children. | |
5386 | If so, read the rest of the partial symbols from this comp unit. | |
5387 | If not, there's no more debug_info for this comp unit. */ | |
5388 | if (has_children) | |
5389 | { | |
5390 | struct partial_die_info *first_die; | |
5391 | CORE_ADDR lowpc, highpc; | |
5392 | ||
5393 | lowpc = ((CORE_ADDR) -1); | |
5394 | highpc = ((CORE_ADDR) 0); | |
5395 | ||
5396 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5397 | ||
5398 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
5399 | ! has_pc_info, cu); | |
5400 | ||
5401 | /* If we didn't find a lowpc, set it to highpc to avoid | |
5402 | complaints from `maint check'. */ | |
5403 | if (lowpc == ((CORE_ADDR) -1)) | |
5404 | lowpc = highpc; | |
5405 | ||
5406 | /* If the compilation unit didn't have an explicit address range, | |
5407 | then use the information extracted from its child dies. */ | |
5408 | if (! has_pc_info) | |
5409 | { | |
5410 | best_lowpc = lowpc; | |
5411 | best_highpc = highpc; | |
5412 | } | |
5413 | } | |
5414 | pst->textlow = best_lowpc + baseaddr; | |
5415 | pst->texthigh = best_highpc + baseaddr; | |
5416 | ||
5417 | pst->n_global_syms = objfile->global_psymbols.next - | |
5418 | (objfile->global_psymbols.list + pst->globals_offset); | |
5419 | pst->n_static_syms = objfile->static_psymbols.next - | |
5420 | (objfile->static_psymbols.list + pst->statics_offset); | |
5421 | sort_pst_symbols (objfile, pst); | |
5422 | ||
5423 | if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs)) | |
5424 | { | |
5425 | int i; | |
5426 | int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5427 | struct dwarf2_per_cu_data *iter; | |
5428 | ||
5429 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
5430 | post-pass. */ | |
5431 | pst->number_of_dependencies = len; | |
5432 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5433 | len * sizeof (struct symtab *)); | |
5434 | for (i = 0; | |
5435 | VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, | |
5436 | i, iter); | |
5437 | ++i) | |
5438 | pst->dependencies[i] = iter->v.psymtab; | |
5439 | ||
5440 | VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs); | |
5441 | } | |
5442 | ||
5443 | /* Get the list of files included in the current compilation unit, | |
5444 | and build a psymtab for each of them. */ | |
5445 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
5446 | ||
5447 | if (dwarf2_read_debug) | |
5448 | { | |
5449 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
5450 | ||
5451 | fprintf_unfiltered (gdb_stdlog, | |
5452 | "Psymtab for %s unit @0x%x: %s - %s" | |
5453 | ", %d global, %d static syms\n", | |
5454 | per_cu->is_debug_types ? "type" : "comp", | |
5455 | per_cu->offset.sect_off, | |
5456 | paddress (gdbarch, pst->textlow), | |
5457 | paddress (gdbarch, pst->texthigh), | |
5458 | pst->n_global_syms, pst->n_static_syms); | |
5459 | } | |
5460 | } | |
5461 | ||
5462 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5463 | Process compilation unit THIS_CU for a psymtab. */ | |
5464 | ||
5465 | static void | |
5466 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
5467 | int want_partial_unit) | |
5468 | { | |
5469 | /* If this compilation unit was already read in, free the | |
5470 | cached copy in order to read it in again. This is | |
5471 | necessary because we skipped some symbols when we first | |
5472 | read in the compilation unit (see load_partial_dies). | |
5473 | This problem could be avoided, but the benefit is unclear. */ | |
5474 | if (this_cu->cu != NULL) | |
5475 | free_one_cached_comp_unit (this_cu); | |
5476 | ||
5477 | gdb_assert (! this_cu->is_debug_types); | |
5478 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, | |
5479 | process_psymtab_comp_unit_reader, | |
5480 | &want_partial_unit); | |
5481 | ||
5482 | /* Age out any secondary CUs. */ | |
5483 | age_cached_comp_units (); | |
5484 | } | |
f4dc4d17 DE |
5485 | |
5486 | /* Reader function for build_type_psymtabs. */ | |
5487 | ||
5488 | static void | |
5489 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 5490 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
5491 | struct die_info *type_unit_die, |
5492 | int has_children, | |
5493 | void *data) | |
5494 | { | |
5495 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5496 | struct dwarf2_cu *cu = reader->cu; | |
5497 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 5498 | struct signatured_type *sig_type; |
f4dc4d17 DE |
5499 | struct type_unit_group *tu_group; |
5500 | struct attribute *attr; | |
5501 | struct partial_die_info *first_die; | |
5502 | CORE_ADDR lowpc, highpc; | |
5503 | struct partial_symtab *pst; | |
5504 | ||
5505 | gdb_assert (data == NULL); | |
0186c6a7 DE |
5506 | gdb_assert (per_cu->is_debug_types); |
5507 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
5508 | |
5509 | if (! has_children) | |
5510 | return; | |
5511 | ||
5512 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 5513 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 5514 | |
0186c6a7 | 5515 | VEC_safe_push (sig_type_ptr, tu_group->tus, sig_type); |
f4dc4d17 DE |
5516 | |
5517 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
5518 | cu->list_in_scope = &file_symbols; | |
5519 | pst = create_partial_symtab (per_cu, ""); | |
5520 | pst->anonymous = 1; | |
5521 | ||
5522 | first_die = load_partial_dies (reader, info_ptr, 1); | |
5523 | ||
5524 | lowpc = (CORE_ADDR) -1; | |
5525 | highpc = (CORE_ADDR) 0; | |
5526 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
5527 | ||
5528 | pst->n_global_syms = objfile->global_psymbols.next - | |
5529 | (objfile->global_psymbols.list + pst->globals_offset); | |
5530 | pst->n_static_syms = objfile->static_psymbols.next - | |
5531 | (objfile->static_psymbols.list + pst->statics_offset); | |
5c80ed9d | 5532 | sort_pst_symbols (objfile, pst); |
f4dc4d17 DE |
5533 | } |
5534 | ||
5535 | /* Traversal function for build_type_psymtabs. */ | |
5536 | ||
5537 | static int | |
5538 | build_type_psymtab_dependencies (void **slot, void *info) | |
5539 | { | |
5540 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5541 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 5542 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 5543 | struct partial_symtab *pst = per_cu->v.psymtab; |
0186c6a7 DE |
5544 | int len = VEC_length (sig_type_ptr, tu_group->tus); |
5545 | struct signatured_type *iter; | |
f4dc4d17 DE |
5546 | int i; |
5547 | ||
5548 | gdb_assert (len > 0); | |
0186c6a7 | 5549 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
5550 | |
5551 | pst->number_of_dependencies = len; | |
5552 | pst->dependencies = obstack_alloc (&objfile->objfile_obstack, | |
5553 | len * sizeof (struct psymtab *)); | |
5554 | for (i = 0; | |
0186c6a7 | 5555 | VEC_iterate (sig_type_ptr, tu_group->tus, i, iter); |
f4dc4d17 DE |
5556 | ++i) |
5557 | { | |
0186c6a7 DE |
5558 | gdb_assert (iter->per_cu.is_debug_types); |
5559 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 5560 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
5561 | } |
5562 | ||
0186c6a7 | 5563 | VEC_free (sig_type_ptr, tu_group->tus); |
348e048f DE |
5564 | |
5565 | return 1; | |
5566 | } | |
5567 | ||
5568 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
5569 | Build partial symbol tables for the .debug_types comp-units. */ | |
5570 | ||
5571 | static void | |
5572 | build_type_psymtabs (struct objfile *objfile) | |
5573 | { | |
0e50663e | 5574 | if (! create_all_type_units (objfile)) |
348e048f DE |
5575 | return; |
5576 | ||
f4dc4d17 DE |
5577 | build_type_unit_groups (build_type_psymtabs_reader, NULL); |
5578 | ||
5579 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
5580 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
5581 | build_type_psymtab_dependencies, NULL); | |
348e048f DE |
5582 | } |
5583 | ||
60606b2c TT |
5584 | /* A cleanup function that clears objfile's psymtabs_addrmap field. */ |
5585 | ||
5586 | static void | |
5587 | psymtabs_addrmap_cleanup (void *o) | |
5588 | { | |
5589 | struct objfile *objfile = o; | |
ec61707d | 5590 | |
60606b2c TT |
5591 | objfile->psymtabs_addrmap = NULL; |
5592 | } | |
5593 | ||
95554aad TT |
5594 | /* Compute the 'user' field for each psymtab in OBJFILE. */ |
5595 | ||
5596 | static void | |
5597 | set_partial_user (struct objfile *objfile) | |
5598 | { | |
5599 | int i; | |
5600 | ||
5601 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) | |
5602 | { | |
5603 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); | |
5604 | struct partial_symtab *pst = per_cu->v.psymtab; | |
5605 | int j; | |
5606 | ||
36586728 TT |
5607 | if (pst == NULL) |
5608 | continue; | |
5609 | ||
95554aad TT |
5610 | for (j = 0; j < pst->number_of_dependencies; ++j) |
5611 | { | |
5612 | /* Set the 'user' field only if it is not already set. */ | |
5613 | if (pst->dependencies[j]->user == NULL) | |
5614 | pst->dependencies[j]->user = pst; | |
5615 | } | |
5616 | } | |
5617 | } | |
5618 | ||
93311388 DE |
5619 | /* Build the partial symbol table by doing a quick pass through the |
5620 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 5621 | |
93311388 | 5622 | static void |
c67a9c90 | 5623 | dwarf2_build_psymtabs_hard (struct objfile *objfile) |
93311388 | 5624 | { |
60606b2c TT |
5625 | struct cleanup *back_to, *addrmap_cleanup; |
5626 | struct obstack temp_obstack; | |
21b2bd31 | 5627 | int i; |
93311388 | 5628 | |
45cfd468 DE |
5629 | if (dwarf2_read_debug) |
5630 | { | |
5631 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
5632 | objfile->name); | |
5633 | } | |
5634 | ||
98bfdba5 PA |
5635 | dwarf2_per_objfile->reading_partial_symbols = 1; |
5636 | ||
be391dca | 5637 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 5638 | |
93311388 DE |
5639 | /* Any cached compilation units will be linked by the per-objfile |
5640 | read_in_chain. Make sure to free them when we're done. */ | |
5641 | back_to = make_cleanup (free_cached_comp_units, NULL); | |
72bf9492 | 5642 | |
348e048f DE |
5643 | build_type_psymtabs (objfile); |
5644 | ||
93311388 | 5645 | create_all_comp_units (objfile); |
c906108c | 5646 | |
60606b2c TT |
5647 | /* Create a temporary address map on a temporary obstack. We later |
5648 | copy this to the final obstack. */ | |
5649 | obstack_init (&temp_obstack); | |
5650 | make_cleanup_obstack_free (&temp_obstack); | |
5651 | objfile->psymtabs_addrmap = addrmap_create_mutable (&temp_obstack); | |
5652 | addrmap_cleanup = make_cleanup (psymtabs_addrmap_cleanup, objfile); | |
72bf9492 | 5653 | |
21b2bd31 | 5654 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
93311388 | 5655 | { |
21b2bd31 | 5656 | struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i); |
aaa75496 | 5657 | |
95554aad | 5658 | process_psymtab_comp_unit (per_cu, 0); |
c906108c | 5659 | } |
ff013f42 | 5660 | |
95554aad TT |
5661 | set_partial_user (objfile); |
5662 | ||
ff013f42 JK |
5663 | objfile->psymtabs_addrmap = addrmap_create_fixed (objfile->psymtabs_addrmap, |
5664 | &objfile->objfile_obstack); | |
60606b2c | 5665 | discard_cleanups (addrmap_cleanup); |
ff013f42 | 5666 | |
ae038cb0 | 5667 | do_cleanups (back_to); |
45cfd468 DE |
5668 | |
5669 | if (dwarf2_read_debug) | |
5670 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", | |
5671 | objfile->name); | |
ae038cb0 DJ |
5672 | } |
5673 | ||
3019eac3 | 5674 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
5675 | |
5676 | static void | |
dee91e82 | 5677 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 5678 | const gdb_byte *info_ptr, |
dee91e82 DE |
5679 | struct die_info *comp_unit_die, |
5680 | int has_children, | |
5681 | void *data) | |
ae038cb0 | 5682 | { |
dee91e82 | 5683 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 5684 | |
95554aad | 5685 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 5686 | |
ae038cb0 DJ |
5687 | /* Check if comp unit has_children. |
5688 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 5689 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 5690 | if (has_children) |
dee91e82 DE |
5691 | load_partial_dies (reader, info_ptr, 0); |
5692 | } | |
98bfdba5 | 5693 | |
dee91e82 DE |
5694 | /* Load the partial DIEs for a secondary CU into memory. |
5695 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 5696 | |
dee91e82 DE |
5697 | static void |
5698 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
5699 | { | |
f4dc4d17 DE |
5700 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
5701 | load_partial_comp_unit_reader, NULL); | |
ae038cb0 DJ |
5702 | } |
5703 | ||
ae038cb0 | 5704 | static void |
36586728 TT |
5705 | read_comp_units_from_section (struct objfile *objfile, |
5706 | struct dwarf2_section_info *section, | |
5707 | unsigned int is_dwz, | |
5708 | int *n_allocated, | |
5709 | int *n_comp_units, | |
5710 | struct dwarf2_per_cu_data ***all_comp_units) | |
ae038cb0 | 5711 | { |
d521ce57 | 5712 | const gdb_byte *info_ptr; |
36586728 | 5713 | bfd *abfd = section->asection->owner; |
be391dca | 5714 | |
bf6af496 DE |
5715 | if (dwarf2_read_debug) |
5716 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", | |
5717 | section->asection->name, bfd_get_filename (abfd)); | |
5718 | ||
36586728 | 5719 | dwarf2_read_section (objfile, section); |
ae038cb0 | 5720 | |
36586728 | 5721 | info_ptr = section->buffer; |
6e70227d | 5722 | |
36586728 | 5723 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 5724 | { |
c764a876 | 5725 | unsigned int length, initial_length_size; |
ae038cb0 | 5726 | struct dwarf2_per_cu_data *this_cu; |
b64f50a1 | 5727 | sect_offset offset; |
ae038cb0 | 5728 | |
36586728 | 5729 | offset.sect_off = info_ptr - section->buffer; |
ae038cb0 DJ |
5730 | |
5731 | /* Read just enough information to find out where the next | |
5732 | compilation unit is. */ | |
36586728 | 5733 | length = read_initial_length (abfd, info_ptr, &initial_length_size); |
ae038cb0 DJ |
5734 | |
5735 | /* Save the compilation unit for later lookup. */ | |
5736 | this_cu = obstack_alloc (&objfile->objfile_obstack, | |
5737 | sizeof (struct dwarf2_per_cu_data)); | |
5738 | memset (this_cu, 0, sizeof (*this_cu)); | |
5739 | this_cu->offset = offset; | |
c764a876 | 5740 | this_cu->length = length + initial_length_size; |
36586728 | 5741 | this_cu->is_dwz = is_dwz; |
9291a0cd | 5742 | this_cu->objfile = objfile; |
8a0459fd | 5743 | this_cu->section = section; |
ae038cb0 | 5744 | |
36586728 | 5745 | if (*n_comp_units == *n_allocated) |
ae038cb0 | 5746 | { |
36586728 TT |
5747 | *n_allocated *= 2; |
5748 | *all_comp_units = xrealloc (*all_comp_units, | |
5749 | *n_allocated | |
5750 | * sizeof (struct dwarf2_per_cu_data *)); | |
ae038cb0 | 5751 | } |
36586728 TT |
5752 | (*all_comp_units)[*n_comp_units] = this_cu; |
5753 | ++*n_comp_units; | |
ae038cb0 DJ |
5754 | |
5755 | info_ptr = info_ptr + this_cu->length; | |
5756 | } | |
36586728 TT |
5757 | } |
5758 | ||
5759 | /* Create a list of all compilation units in OBJFILE. | |
5760 | This is only done for -readnow and building partial symtabs. */ | |
5761 | ||
5762 | static void | |
5763 | create_all_comp_units (struct objfile *objfile) | |
5764 | { | |
5765 | int n_allocated; | |
5766 | int n_comp_units; | |
5767 | struct dwarf2_per_cu_data **all_comp_units; | |
5768 | ||
5769 | n_comp_units = 0; | |
5770 | n_allocated = 10; | |
5771 | all_comp_units = xmalloc (n_allocated | |
5772 | * sizeof (struct dwarf2_per_cu_data *)); | |
5773 | ||
5774 | read_comp_units_from_section (objfile, &dwarf2_per_objfile->info, 0, | |
5775 | &n_allocated, &n_comp_units, &all_comp_units); | |
5776 | ||
5777 | if (bfd_get_section_by_name (objfile->obfd, ".gnu_debugaltlink") != NULL) | |
5778 | { | |
5779 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
5780 | ||
5781 | read_comp_units_from_section (objfile, &dwz->info, 1, | |
5782 | &n_allocated, &n_comp_units, | |
5783 | &all_comp_units); | |
5784 | } | |
ae038cb0 DJ |
5785 | |
5786 | dwarf2_per_objfile->all_comp_units | |
5787 | = obstack_alloc (&objfile->objfile_obstack, | |
5788 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5789 | memcpy (dwarf2_per_objfile->all_comp_units, all_comp_units, | |
5790 | n_comp_units * sizeof (struct dwarf2_per_cu_data *)); | |
5791 | xfree (all_comp_units); | |
5792 | dwarf2_per_objfile->n_comp_units = n_comp_units; | |
c906108c SS |
5793 | } |
5794 | ||
5734ee8b DJ |
5795 | /* Process all loaded DIEs for compilation unit CU, starting at |
5796 | FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation | |
5797 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or | |
5798 | DW_AT_ranges). If NEED_PC is set, then this function will set | |
5799 | *LOWPC and *HIGHPC to the lowest and highest PC values found in CU | |
5800 | and record the covered ranges in the addrmap. */ | |
c906108c | 5801 | |
72bf9492 DJ |
5802 | static void |
5803 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
5734ee8b | 5804 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) |
c906108c | 5805 | { |
72bf9492 | 5806 | struct partial_die_info *pdi; |
c906108c | 5807 | |
91c24f0a DC |
5808 | /* Now, march along the PDI's, descending into ones which have |
5809 | interesting children but skipping the children of the other ones, | |
5810 | until we reach the end of the compilation unit. */ | |
c906108c | 5811 | |
72bf9492 | 5812 | pdi = first_die; |
91c24f0a | 5813 | |
72bf9492 DJ |
5814 | while (pdi != NULL) |
5815 | { | |
5816 | fixup_partial_die (pdi, cu); | |
c906108c | 5817 | |
f55ee35c | 5818 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
5819 | children, so we need to look at them. Ditto for anonymous |
5820 | enums. */ | |
933c6fe4 | 5821 | |
72bf9492 | 5822 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad TT |
5823 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
5824 | || pdi->tag == DW_TAG_imported_unit) | |
c906108c | 5825 | { |
72bf9492 | 5826 | switch (pdi->tag) |
c906108c SS |
5827 | { |
5828 | case DW_TAG_subprogram: | |
5734ee8b | 5829 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
c906108c | 5830 | break; |
72929c62 | 5831 | case DW_TAG_constant: |
c906108c SS |
5832 | case DW_TAG_variable: |
5833 | case DW_TAG_typedef: | |
91c24f0a | 5834 | case DW_TAG_union_type: |
72bf9492 | 5835 | if (!pdi->is_declaration) |
63d06c5c | 5836 | { |
72bf9492 | 5837 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
5838 | } |
5839 | break; | |
c906108c | 5840 | case DW_TAG_class_type: |
680b30c7 | 5841 | case DW_TAG_interface_type: |
c906108c | 5842 | case DW_TAG_structure_type: |
72bf9492 | 5843 | if (!pdi->is_declaration) |
c906108c | 5844 | { |
72bf9492 | 5845 | add_partial_symbol (pdi, cu); |
c906108c SS |
5846 | } |
5847 | break; | |
91c24f0a | 5848 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
5849 | if (!pdi->is_declaration) |
5850 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
5851 | break; |
5852 | case DW_TAG_base_type: | |
a02abb62 | 5853 | case DW_TAG_subrange_type: |
c906108c | 5854 | /* File scope base type definitions are added to the partial |
c5aa993b | 5855 | symbol table. */ |
72bf9492 | 5856 | add_partial_symbol (pdi, cu); |
c906108c | 5857 | break; |
d9fa45fe | 5858 | case DW_TAG_namespace: |
5734ee8b | 5859 | add_partial_namespace (pdi, lowpc, highpc, need_pc, cu); |
91c24f0a | 5860 | break; |
5d7cb8df JK |
5861 | case DW_TAG_module: |
5862 | add_partial_module (pdi, lowpc, highpc, need_pc, cu); | |
5863 | break; | |
95554aad TT |
5864 | case DW_TAG_imported_unit: |
5865 | { | |
5866 | struct dwarf2_per_cu_data *per_cu; | |
5867 | ||
f4dc4d17 DE |
5868 | /* For now we don't handle imported units in type units. */ |
5869 | if (cu->per_cu->is_debug_types) | |
5870 | { | |
5871 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
5872 | " supported in type units [in module %s]"), | |
5873 | cu->objfile->name); | |
5874 | } | |
5875 | ||
95554aad | 5876 | per_cu = dwarf2_find_containing_comp_unit (pdi->d.offset, |
36586728 | 5877 | pdi->is_dwz, |
95554aad TT |
5878 | cu->objfile); |
5879 | ||
5880 | /* Go read the partial unit, if needed. */ | |
5881 | if (per_cu->v.psymtab == NULL) | |
5882 | process_psymtab_comp_unit (per_cu, 1); | |
5883 | ||
f4dc4d17 | 5884 | VEC_safe_push (dwarf2_per_cu_ptr, |
796a7ff8 | 5885 | cu->per_cu->imported_symtabs, per_cu); |
95554aad TT |
5886 | } |
5887 | break; | |
c906108c SS |
5888 | default: |
5889 | break; | |
5890 | } | |
5891 | } | |
5892 | ||
72bf9492 DJ |
5893 | /* If the die has a sibling, skip to the sibling. */ |
5894 | ||
5895 | pdi = pdi->die_sibling; | |
5896 | } | |
5897 | } | |
5898 | ||
5899 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 5900 | |
72bf9492 | 5901 | Normally, this is simple. For C++, the parent DIE's fully scoped |
987504bb JJ |
5902 | name is concatenated with "::" and the partial DIE's name. For |
5903 | Java, the same thing occurs except that "." is used instead of "::". | |
72bf9492 DJ |
5904 | Enumerators are an exception; they use the scope of their parent |
5905 | enumeration type, i.e. the name of the enumeration type is not | |
5906 | prepended to the enumerator. | |
91c24f0a | 5907 | |
72bf9492 DJ |
5908 | There are two complexities. One is DW_AT_specification; in this |
5909 | case "parent" means the parent of the target of the specification, | |
5910 | instead of the direct parent of the DIE. The other is compilers | |
5911 | which do not emit DW_TAG_namespace; in this case we try to guess | |
5912 | the fully qualified name of structure types from their members' | |
5913 | linkage names. This must be done using the DIE's children rather | |
5914 | than the children of any DW_AT_specification target. We only need | |
5915 | to do this for structures at the top level, i.e. if the target of | |
5916 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
5917 | have a parent. */ | |
5918 | ||
5919 | /* Compute the scope prefix associated with PDI's parent, in | |
5920 | compilation unit CU. The result will be allocated on CU's | |
5921 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
5922 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 5923 | static const char * |
72bf9492 DJ |
5924 | partial_die_parent_scope (struct partial_die_info *pdi, |
5925 | struct dwarf2_cu *cu) | |
5926 | { | |
15d034d0 | 5927 | const char *grandparent_scope; |
72bf9492 | 5928 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 5929 | |
72bf9492 DJ |
5930 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
5931 | then this means the parent of the specification DIE. */ | |
5932 | ||
5933 | real_pdi = pdi; | |
72bf9492 | 5934 | while (real_pdi->has_specification) |
36586728 TT |
5935 | real_pdi = find_partial_die (real_pdi->spec_offset, |
5936 | real_pdi->spec_is_dwz, cu); | |
72bf9492 DJ |
5937 | |
5938 | parent = real_pdi->die_parent; | |
5939 | if (parent == NULL) | |
5940 | return NULL; | |
5941 | ||
5942 | if (parent->scope_set) | |
5943 | return parent->scope; | |
5944 | ||
5945 | fixup_partial_die (parent, cu); | |
5946 | ||
10b3939b | 5947 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 5948 | |
acebe513 UW |
5949 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
5950 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
5951 | Work around this problem here. */ | |
5952 | if (cu->language == language_cplus | |
6e70227d | 5953 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
5954 | && strcmp (parent->name, "::") == 0 |
5955 | && grandparent_scope == NULL) | |
5956 | { | |
5957 | parent->scope = NULL; | |
5958 | parent->scope_set = 1; | |
5959 | return NULL; | |
5960 | } | |
5961 | ||
9c6c53f7 SA |
5962 | if (pdi->tag == DW_TAG_enumerator) |
5963 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
5964 | parent->scope = grandparent_scope; | |
5965 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 5966 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
5967 | || parent->tag == DW_TAG_structure_type |
5968 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 5969 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a TT |
5970 | || parent->tag == DW_TAG_union_type |
5971 | || parent->tag == DW_TAG_enumeration_type) | |
72bf9492 DJ |
5972 | { |
5973 | if (grandparent_scope == NULL) | |
5974 | parent->scope = parent->name; | |
5975 | else | |
3e43a32a MS |
5976 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
5977 | grandparent_scope, | |
f55ee35c | 5978 | parent->name, 0, cu); |
72bf9492 | 5979 | } |
72bf9492 DJ |
5980 | else |
5981 | { | |
5982 | /* FIXME drow/2004-04-01: What should we be doing with | |
5983 | function-local names? For partial symbols, we should probably be | |
5984 | ignoring them. */ | |
5985 | complaint (&symfile_complaints, | |
e2e0b3e5 | 5986 | _("unhandled containing DIE tag %d for DIE at %d"), |
b64f50a1 | 5987 | parent->tag, pdi->offset.sect_off); |
72bf9492 | 5988 | parent->scope = grandparent_scope; |
c906108c SS |
5989 | } |
5990 | ||
72bf9492 DJ |
5991 | parent->scope_set = 1; |
5992 | return parent->scope; | |
5993 | } | |
5994 | ||
5995 | /* Return the fully scoped name associated with PDI, from compilation unit | |
5996 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 5997 | |
72bf9492 DJ |
5998 | static char * |
5999 | partial_die_full_name (struct partial_die_info *pdi, | |
6000 | struct dwarf2_cu *cu) | |
6001 | { | |
15d034d0 | 6002 | const char *parent_scope; |
72bf9492 | 6003 | |
98bfdba5 PA |
6004 | /* If this is a template instantiation, we can not work out the |
6005 | template arguments from partial DIEs. So, unfortunately, we have | |
6006 | to go through the full DIEs. At least any work we do building | |
6007 | types here will be reused if full symbols are loaded later. */ | |
6008 | if (pdi->has_template_arguments) | |
6009 | { | |
6010 | fixup_partial_die (pdi, cu); | |
6011 | ||
6012 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
6013 | { | |
6014 | struct die_info *die; | |
6015 | struct attribute attr; | |
6016 | struct dwarf2_cu *ref_cu = cu; | |
6017 | ||
b64f50a1 | 6018 | /* DW_FORM_ref_addr is using section offset. */ |
98bfdba5 PA |
6019 | attr.name = 0; |
6020 | attr.form = DW_FORM_ref_addr; | |
4568ecf9 | 6021 | attr.u.unsnd = pdi->offset.sect_off; |
98bfdba5 PA |
6022 | die = follow_die_ref (NULL, &attr, &ref_cu); |
6023 | ||
6024 | return xstrdup (dwarf2_full_name (NULL, die, ref_cu)); | |
6025 | } | |
6026 | } | |
6027 | ||
72bf9492 DJ |
6028 | parent_scope = partial_die_parent_scope (pdi, cu); |
6029 | if (parent_scope == NULL) | |
6030 | return NULL; | |
6031 | else | |
f55ee35c | 6032 | return typename_concat (NULL, parent_scope, pdi->name, 0, cu); |
c906108c SS |
6033 | } |
6034 | ||
6035 | static void | |
72bf9492 | 6036 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 6037 | { |
e7c27a73 | 6038 | struct objfile *objfile = cu->objfile; |
c906108c | 6039 | CORE_ADDR addr = 0; |
15d034d0 | 6040 | const char *actual_name = NULL; |
e142c38c | 6041 | CORE_ADDR baseaddr; |
15d034d0 | 6042 | char *built_actual_name; |
e142c38c DJ |
6043 | |
6044 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 6045 | |
15d034d0 TT |
6046 | built_actual_name = partial_die_full_name (pdi, cu); |
6047 | if (built_actual_name != NULL) | |
6048 | actual_name = built_actual_name; | |
63d06c5c | 6049 | |
72bf9492 DJ |
6050 | if (actual_name == NULL) |
6051 | actual_name = pdi->name; | |
6052 | ||
c906108c SS |
6053 | switch (pdi->tag) |
6054 | { | |
6055 | case DW_TAG_subprogram: | |
2cfa0c8d | 6056 | if (pdi->is_external || cu->language == language_ada) |
c906108c | 6057 | { |
2cfa0c8d JB |
6058 | /* brobecker/2007-12-26: Normally, only "external" DIEs are part |
6059 | of the global scope. But in Ada, we want to be able to access | |
6060 | nested procedures globally. So all Ada subprograms are stored | |
6061 | in the global scope. */ | |
f47fb265 | 6062 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6063 | mst_text, objfile); */ |
f47fb265 | 6064 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6065 | built_actual_name != NULL, |
f47fb265 MS |
6066 | VAR_DOMAIN, LOC_BLOCK, |
6067 | &objfile->global_psymbols, | |
6068 | 0, pdi->lowpc + baseaddr, | |
6069 | cu->language, objfile); | |
c906108c SS |
6070 | } |
6071 | else | |
6072 | { | |
f47fb265 | 6073 | /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr, |
c5aa993b | 6074 | mst_file_text, objfile); */ |
f47fb265 | 6075 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6076 | built_actual_name != NULL, |
f47fb265 MS |
6077 | VAR_DOMAIN, LOC_BLOCK, |
6078 | &objfile->static_psymbols, | |
6079 | 0, pdi->lowpc + baseaddr, | |
6080 | cu->language, objfile); | |
c906108c SS |
6081 | } |
6082 | break; | |
72929c62 JB |
6083 | case DW_TAG_constant: |
6084 | { | |
6085 | struct psymbol_allocation_list *list; | |
6086 | ||
6087 | if (pdi->is_external) | |
6088 | list = &objfile->global_psymbols; | |
6089 | else | |
6090 | list = &objfile->static_psymbols; | |
f47fb265 | 6091 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6092 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
f47fb265 | 6093 | list, 0, 0, cu->language, objfile); |
72929c62 JB |
6094 | } |
6095 | break; | |
c906108c | 6096 | case DW_TAG_variable: |
95554aad TT |
6097 | if (pdi->d.locdesc) |
6098 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 6099 | |
95554aad | 6100 | if (pdi->d.locdesc |
caac4577 JG |
6101 | && addr == 0 |
6102 | && !dwarf2_per_objfile->has_section_at_zero) | |
6103 | { | |
6104 | /* A global or static variable may also have been stripped | |
6105 | out by the linker if unused, in which case its address | |
6106 | will be nullified; do not add such variables into partial | |
6107 | symbol table then. */ | |
6108 | } | |
6109 | else if (pdi->is_external) | |
c906108c SS |
6110 | { |
6111 | /* Global Variable. | |
6112 | Don't enter into the minimal symbol tables as there is | |
6113 | a minimal symbol table entry from the ELF symbols already. | |
6114 | Enter into partial symbol table if it has a location | |
6115 | descriptor or a type. | |
6116 | If the location descriptor is missing, new_symbol will create | |
6117 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
6118 | be determined from the minimal symbol table whenever the variable | |
6119 | is referenced. | |
6120 | The address for the partial symbol table entry is not | |
6121 | used by GDB, but it comes in handy for debugging partial symbol | |
6122 | table building. */ | |
6123 | ||
95554aad | 6124 | if (pdi->d.locdesc || pdi->has_type) |
f47fb265 | 6125 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6126 | built_actual_name != NULL, |
f47fb265 MS |
6127 | VAR_DOMAIN, LOC_STATIC, |
6128 | &objfile->global_psymbols, | |
6129 | 0, addr + baseaddr, | |
6130 | cu->language, objfile); | |
c906108c SS |
6131 | } |
6132 | else | |
6133 | { | |
0963b4bd | 6134 | /* Static Variable. Skip symbols without location descriptors. */ |
95554aad | 6135 | if (pdi->d.locdesc == NULL) |
decbce07 | 6136 | { |
15d034d0 | 6137 | xfree (built_actual_name); |
decbce07 MS |
6138 | return; |
6139 | } | |
f47fb265 | 6140 | /* prim_record_minimal_symbol (actual_name, addr + baseaddr, |
c5aa993b | 6141 | mst_file_data, objfile); */ |
f47fb265 | 6142 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6143 | built_actual_name != NULL, |
f47fb265 MS |
6144 | VAR_DOMAIN, LOC_STATIC, |
6145 | &objfile->static_psymbols, | |
6146 | 0, addr + baseaddr, | |
6147 | cu->language, objfile); | |
c906108c SS |
6148 | } |
6149 | break; | |
6150 | case DW_TAG_typedef: | |
6151 | case DW_TAG_base_type: | |
a02abb62 | 6152 | case DW_TAG_subrange_type: |
38d518c9 | 6153 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6154 | built_actual_name != NULL, |
176620f1 | 6155 | VAR_DOMAIN, LOC_TYPEDEF, |
c906108c | 6156 | &objfile->static_psymbols, |
e142c38c | 6157 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6158 | break; |
72bf9492 DJ |
6159 | case DW_TAG_namespace: |
6160 | add_psymbol_to_list (actual_name, strlen (actual_name), | |
15d034d0 | 6161 | built_actual_name != NULL, |
72bf9492 DJ |
6162 | VAR_DOMAIN, LOC_TYPEDEF, |
6163 | &objfile->global_psymbols, | |
6164 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
6165 | break; | |
c906108c | 6166 | case DW_TAG_class_type: |
680b30c7 | 6167 | case DW_TAG_interface_type: |
c906108c SS |
6168 | case DW_TAG_structure_type: |
6169 | case DW_TAG_union_type: | |
6170 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
6171 | /* Skip external references. The DWARF standard says in the section |
6172 | about "Structure, Union, and Class Type Entries": "An incomplete | |
6173 | structure, union or class type is represented by a structure, | |
6174 | union or class entry that does not have a byte size attribute | |
6175 | and that has a DW_AT_declaration attribute." */ | |
6176 | if (!pdi->has_byte_size && pdi->is_declaration) | |
decbce07 | 6177 | { |
15d034d0 | 6178 | xfree (built_actual_name); |
decbce07 MS |
6179 | return; |
6180 | } | |
fa4028e9 | 6181 | |
63d06c5c DC |
6182 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
6183 | static vs. global. */ | |
38d518c9 | 6184 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6185 | built_actual_name != NULL, |
176620f1 | 6186 | STRUCT_DOMAIN, LOC_TYPEDEF, |
987504bb JJ |
6187 | (cu->language == language_cplus |
6188 | || cu->language == language_java) | |
63d06c5c DC |
6189 | ? &objfile->global_psymbols |
6190 | : &objfile->static_psymbols, | |
e142c38c | 6191 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c | 6192 | |
c906108c SS |
6193 | break; |
6194 | case DW_TAG_enumerator: | |
38d518c9 | 6195 | add_psymbol_to_list (actual_name, strlen (actual_name), |
15d034d0 | 6196 | built_actual_name != NULL, |
176620f1 | 6197 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
6198 | (cu->language == language_cplus |
6199 | || cu->language == language_java) | |
f6fe98ef DJ |
6200 | ? &objfile->global_psymbols |
6201 | : &objfile->static_psymbols, | |
e142c38c | 6202 | 0, (CORE_ADDR) 0, cu->language, objfile); |
c906108c SS |
6203 | break; |
6204 | default: | |
6205 | break; | |
6206 | } | |
5c4e30ca | 6207 | |
15d034d0 | 6208 | xfree (built_actual_name); |
c906108c SS |
6209 | } |
6210 | ||
5c4e30ca DC |
6211 | /* Read a partial die corresponding to a namespace; also, add a symbol |
6212 | corresponding to that namespace to the symbol table. NAMESPACE is | |
6213 | the name of the enclosing namespace. */ | |
91c24f0a | 6214 | |
72bf9492 DJ |
6215 | static void |
6216 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 6217 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
5734ee8b | 6218 | int need_pc, struct dwarf2_cu *cu) |
91c24f0a | 6219 | { |
72bf9492 | 6220 | /* Add a symbol for the namespace. */ |
e7c27a73 | 6221 | |
72bf9492 | 6222 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
6223 | |
6224 | /* Now scan partial symbols in that namespace. */ | |
6225 | ||
91c24f0a | 6226 | if (pdi->has_children) |
5734ee8b | 6227 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); |
91c24f0a DC |
6228 | } |
6229 | ||
5d7cb8df JK |
6230 | /* Read a partial die corresponding to a Fortran module. */ |
6231 | ||
6232 | static void | |
6233 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
6234 | CORE_ADDR *highpc, int need_pc, struct dwarf2_cu *cu) | |
6235 | { | |
f55ee35c | 6236 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
6237 | |
6238 | if (pdi->has_children) | |
6239 | scan_partial_symbols (pdi->die_child, lowpc, highpc, need_pc, cu); | |
6240 | } | |
6241 | ||
bc30ff58 JB |
6242 | /* Read a partial die corresponding to a subprogram and create a partial |
6243 | symbol for that subprogram. When the CU language allows it, this | |
6244 | routine also defines a partial symbol for each nested subprogram | |
6245 | that this subprogram contains. | |
6e70227d | 6246 | |
bc30ff58 JB |
6247 | DIE my also be a lexical block, in which case we simply search |
6248 | recursively for suprograms defined inside that lexical block. | |
6249 | Again, this is only performed when the CU language allows this | |
6250 | type of definitions. */ | |
6251 | ||
6252 | static void | |
6253 | add_partial_subprogram (struct partial_die_info *pdi, | |
6254 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 6255 | int need_pc, struct dwarf2_cu *cu) |
bc30ff58 JB |
6256 | { |
6257 | if (pdi->tag == DW_TAG_subprogram) | |
6258 | { | |
6259 | if (pdi->has_pc_info) | |
6260 | { | |
6261 | if (pdi->lowpc < *lowpc) | |
6262 | *lowpc = pdi->lowpc; | |
6263 | if (pdi->highpc > *highpc) | |
6264 | *highpc = pdi->highpc; | |
5734ee8b DJ |
6265 | if (need_pc) |
6266 | { | |
6267 | CORE_ADDR baseaddr; | |
6268 | struct objfile *objfile = cu->objfile; | |
6269 | ||
6270 | baseaddr = ANOFFSET (objfile->section_offsets, | |
6271 | SECT_OFF_TEXT (objfile)); | |
6272 | addrmap_set_empty (objfile->psymtabs_addrmap, | |
01637564 DE |
6273 | pdi->lowpc + baseaddr, |
6274 | pdi->highpc - 1 + baseaddr, | |
9291a0cd | 6275 | cu->per_cu->v.psymtab); |
5734ee8b | 6276 | } |
481860b3 GB |
6277 | } |
6278 | ||
6279 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
6280 | { | |
bc30ff58 | 6281 | if (!pdi->is_declaration) |
e8d05480 JB |
6282 | /* Ignore subprogram DIEs that do not have a name, they are |
6283 | illegal. Do not emit a complaint at this point, we will | |
6284 | do so when we convert this psymtab into a symtab. */ | |
6285 | if (pdi->name) | |
6286 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
6287 | } |
6288 | } | |
6e70227d | 6289 | |
bc30ff58 JB |
6290 | if (! pdi->has_children) |
6291 | return; | |
6292 | ||
6293 | if (cu->language == language_ada) | |
6294 | { | |
6295 | pdi = pdi->die_child; | |
6296 | while (pdi != NULL) | |
6297 | { | |
6298 | fixup_partial_die (pdi, cu); | |
6299 | if (pdi->tag == DW_TAG_subprogram | |
6300 | || pdi->tag == DW_TAG_lexical_block) | |
5734ee8b | 6301 | add_partial_subprogram (pdi, lowpc, highpc, need_pc, cu); |
bc30ff58 JB |
6302 | pdi = pdi->die_sibling; |
6303 | } | |
6304 | } | |
6305 | } | |
6306 | ||
91c24f0a DC |
6307 | /* Read a partial die corresponding to an enumeration type. */ |
6308 | ||
72bf9492 DJ |
6309 | static void |
6310 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
6311 | struct dwarf2_cu *cu) | |
91c24f0a | 6312 | { |
72bf9492 | 6313 | struct partial_die_info *pdi; |
91c24f0a DC |
6314 | |
6315 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
6316 | add_partial_symbol (enum_pdi, cu); |
6317 | ||
6318 | pdi = enum_pdi->die_child; | |
6319 | while (pdi) | |
91c24f0a | 6320 | { |
72bf9492 | 6321 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
e2e0b3e5 | 6322 | complaint (&symfile_complaints, _("malformed enumerator DIE ignored")); |
91c24f0a | 6323 | else |
72bf9492 DJ |
6324 | add_partial_symbol (pdi, cu); |
6325 | pdi = pdi->die_sibling; | |
91c24f0a | 6326 | } |
91c24f0a DC |
6327 | } |
6328 | ||
6caca83c CC |
6329 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
6330 | ||
6331 | static unsigned int | |
d521ce57 | 6332 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
6333 | { |
6334 | unsigned int bytes_read; | |
6335 | ||
6336 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6337 | } | |
6338 | ||
4bb7a0a7 DJ |
6339 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU. |
6340 | Return the corresponding abbrev, or NULL if the number is zero (indicating | |
6341 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
6342 | the initial number. */ | |
6343 | ||
6344 | static struct abbrev_info * | |
d521ce57 | 6345 | peek_die_abbrev (const gdb_byte *info_ptr, unsigned int *bytes_read, |
891d2f0b | 6346 | struct dwarf2_cu *cu) |
4bb7a0a7 DJ |
6347 | { |
6348 | bfd *abfd = cu->objfile->obfd; | |
6349 | unsigned int abbrev_number; | |
6350 | struct abbrev_info *abbrev; | |
6351 | ||
6352 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
6353 | ||
6354 | if (abbrev_number == 0) | |
6355 | return NULL; | |
6356 | ||
433df2d4 | 6357 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
4bb7a0a7 DJ |
6358 | if (!abbrev) |
6359 | { | |
3e43a32a MS |
6360 | error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), |
6361 | abbrev_number, bfd_get_filename (abfd)); | |
4bb7a0a7 DJ |
6362 | } |
6363 | ||
6364 | return abbrev; | |
6365 | } | |
6366 | ||
93311388 DE |
6367 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6368 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
6369 | DIE. Any children of the skipped DIEs will also be skipped. */ |
6370 | ||
d521ce57 TT |
6371 | static const gdb_byte * |
6372 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 6373 | { |
dee91e82 | 6374 | struct dwarf2_cu *cu = reader->cu; |
4bb7a0a7 DJ |
6375 | struct abbrev_info *abbrev; |
6376 | unsigned int bytes_read; | |
6377 | ||
6378 | while (1) | |
6379 | { | |
6380 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
6381 | if (abbrev == NULL) | |
6382 | return info_ptr + bytes_read; | |
6383 | else | |
dee91e82 | 6384 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
6385 | } |
6386 | } | |
6387 | ||
93311388 DE |
6388 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
6389 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
6390 | abbrev corresponding to that skipped uleb128 should be passed in |
6391 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
6392 | children. */ | |
6393 | ||
d521ce57 TT |
6394 | static const gdb_byte * |
6395 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 6396 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
6397 | { |
6398 | unsigned int bytes_read; | |
6399 | struct attribute attr; | |
dee91e82 DE |
6400 | bfd *abfd = reader->abfd; |
6401 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 6402 | const gdb_byte *buffer = reader->buffer; |
f664829e | 6403 | const gdb_byte *buffer_end = reader->buffer_end; |
d521ce57 | 6404 | const gdb_byte *start_info_ptr = info_ptr; |
4bb7a0a7 DJ |
6405 | unsigned int form, i; |
6406 | ||
6407 | for (i = 0; i < abbrev->num_attrs; i++) | |
6408 | { | |
6409 | /* The only abbrev we care about is DW_AT_sibling. */ | |
6410 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
6411 | { | |
dee91e82 | 6412 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 6413 | if (attr.form == DW_FORM_ref_addr) |
3e43a32a MS |
6414 | complaint (&symfile_complaints, |
6415 | _("ignoring absolute DW_AT_sibling")); | |
4bb7a0a7 | 6416 | else |
b64f50a1 | 6417 | return buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
4bb7a0a7 DJ |
6418 | } |
6419 | ||
6420 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
6421 | form = abbrev->attrs[i].form; | |
6422 | skip_attribute: | |
6423 | switch (form) | |
6424 | { | |
4bb7a0a7 | 6425 | case DW_FORM_ref_addr: |
ae411497 TT |
6426 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
6427 | and later it is offset sized. */ | |
6428 | if (cu->header.version == 2) | |
6429 | info_ptr += cu->header.addr_size; | |
6430 | else | |
6431 | info_ptr += cu->header.offset_size; | |
6432 | break; | |
36586728 TT |
6433 | case DW_FORM_GNU_ref_alt: |
6434 | info_ptr += cu->header.offset_size; | |
6435 | break; | |
ae411497 | 6436 | case DW_FORM_addr: |
4bb7a0a7 DJ |
6437 | info_ptr += cu->header.addr_size; |
6438 | break; | |
6439 | case DW_FORM_data1: | |
6440 | case DW_FORM_ref1: | |
6441 | case DW_FORM_flag: | |
6442 | info_ptr += 1; | |
6443 | break; | |
2dc7f7b3 TT |
6444 | case DW_FORM_flag_present: |
6445 | break; | |
4bb7a0a7 DJ |
6446 | case DW_FORM_data2: |
6447 | case DW_FORM_ref2: | |
6448 | info_ptr += 2; | |
6449 | break; | |
6450 | case DW_FORM_data4: | |
6451 | case DW_FORM_ref4: | |
6452 | info_ptr += 4; | |
6453 | break; | |
6454 | case DW_FORM_data8: | |
6455 | case DW_FORM_ref8: | |
55f1336d | 6456 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
6457 | info_ptr += 8; |
6458 | break; | |
6459 | case DW_FORM_string: | |
9b1c24c8 | 6460 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
6461 | info_ptr += bytes_read; |
6462 | break; | |
2dc7f7b3 | 6463 | case DW_FORM_sec_offset: |
4bb7a0a7 | 6464 | case DW_FORM_strp: |
36586728 | 6465 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
6466 | info_ptr += cu->header.offset_size; |
6467 | break; | |
2dc7f7b3 | 6468 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
6469 | case DW_FORM_block: |
6470 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6471 | info_ptr += bytes_read; | |
6472 | break; | |
6473 | case DW_FORM_block1: | |
6474 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
6475 | break; | |
6476 | case DW_FORM_block2: | |
6477 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
6478 | break; | |
6479 | case DW_FORM_block4: | |
6480 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
6481 | break; | |
6482 | case DW_FORM_sdata: | |
6483 | case DW_FORM_udata: | |
6484 | case DW_FORM_ref_udata: | |
3019eac3 DE |
6485 | case DW_FORM_GNU_addr_index: |
6486 | case DW_FORM_GNU_str_index: | |
d521ce57 | 6487 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
6488 | break; |
6489 | case DW_FORM_indirect: | |
6490 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
6491 | info_ptr += bytes_read; | |
6492 | /* We need to continue parsing from here, so just go back to | |
6493 | the top. */ | |
6494 | goto skip_attribute; | |
6495 | ||
6496 | default: | |
3e43a32a MS |
6497 | error (_("Dwarf Error: Cannot handle %s " |
6498 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
6499 | dwarf_form_name (form), |
6500 | bfd_get_filename (abfd)); | |
6501 | } | |
6502 | } | |
6503 | ||
6504 | if (abbrev->has_children) | |
dee91e82 | 6505 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
6506 | else |
6507 | return info_ptr; | |
6508 | } | |
6509 | ||
93311388 | 6510 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 6511 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 6512 | |
d521ce57 | 6513 | static const gdb_byte * |
dee91e82 DE |
6514 | locate_pdi_sibling (const struct die_reader_specs *reader, |
6515 | struct partial_die_info *orig_pdi, | |
d521ce57 | 6516 | const gdb_byte *info_ptr) |
91c24f0a DC |
6517 | { |
6518 | /* Do we know the sibling already? */ | |
72bf9492 | 6519 | |
91c24f0a DC |
6520 | if (orig_pdi->sibling) |
6521 | return orig_pdi->sibling; | |
6522 | ||
6523 | /* Are there any children to deal with? */ | |
6524 | ||
6525 | if (!orig_pdi->has_children) | |
6526 | return info_ptr; | |
6527 | ||
4bb7a0a7 | 6528 | /* Skip the children the long way. */ |
91c24f0a | 6529 | |
dee91e82 | 6530 | return skip_children (reader, info_ptr); |
91c24f0a DC |
6531 | } |
6532 | ||
257e7a09 | 6533 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 6534 | not NULL. */ |
c906108c SS |
6535 | |
6536 | static void | |
257e7a09 YQ |
6537 | dwarf2_read_symtab (struct partial_symtab *self, |
6538 | struct objfile *objfile) | |
c906108c | 6539 | { |
257e7a09 | 6540 | if (self->readin) |
c906108c | 6541 | { |
442e4d9c | 6542 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 6543 | self->filename); |
442e4d9c YQ |
6544 | } |
6545 | else | |
6546 | { | |
6547 | if (info_verbose) | |
c906108c | 6548 | { |
442e4d9c | 6549 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 6550 | self->filename); |
442e4d9c | 6551 | gdb_flush (gdb_stdout); |
c906108c | 6552 | } |
c906108c | 6553 | |
442e4d9c YQ |
6554 | /* Restore our global data. */ |
6555 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
10b3939b | 6556 | |
442e4d9c YQ |
6557 | /* If this psymtab is constructed from a debug-only objfile, the |
6558 | has_section_at_zero flag will not necessarily be correct. We | |
6559 | can get the correct value for this flag by looking at the data | |
6560 | associated with the (presumably stripped) associated objfile. */ | |
6561 | if (objfile->separate_debug_objfile_backlink) | |
6562 | { | |
6563 | struct dwarf2_per_objfile *dpo_backlink | |
6564 | = objfile_data (objfile->separate_debug_objfile_backlink, | |
6565 | dwarf2_objfile_data_key); | |
9a619af0 | 6566 | |
442e4d9c YQ |
6567 | dwarf2_per_objfile->has_section_at_zero |
6568 | = dpo_backlink->has_section_at_zero; | |
6569 | } | |
b2ab525c | 6570 | |
442e4d9c | 6571 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 6572 | |
257e7a09 | 6573 | psymtab_to_symtab_1 (self); |
c906108c | 6574 | |
442e4d9c YQ |
6575 | /* Finish up the debug error message. */ |
6576 | if (info_verbose) | |
6577 | printf_filtered (_("done.\n")); | |
c906108c | 6578 | } |
95554aad TT |
6579 | |
6580 | process_cu_includes (); | |
c906108c | 6581 | } |
9cdd5dbd DE |
6582 | \f |
6583 | /* Reading in full CUs. */ | |
c906108c | 6584 | |
10b3939b DJ |
6585 | /* Add PER_CU to the queue. */ |
6586 | ||
6587 | static void | |
95554aad TT |
6588 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
6589 | enum language pretend_language) | |
10b3939b DJ |
6590 | { |
6591 | struct dwarf2_queue_item *item; | |
6592 | ||
6593 | per_cu->queued = 1; | |
6594 | item = xmalloc (sizeof (*item)); | |
6595 | item->per_cu = per_cu; | |
95554aad | 6596 | item->pretend_language = pretend_language; |
10b3939b DJ |
6597 | item->next = NULL; |
6598 | ||
6599 | if (dwarf2_queue == NULL) | |
6600 | dwarf2_queue = item; | |
6601 | else | |
6602 | dwarf2_queue_tail->next = item; | |
6603 | ||
6604 | dwarf2_queue_tail = item; | |
6605 | } | |
6606 | ||
0907af0c DE |
6607 | /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation |
6608 | unit and add it to our queue. | |
6609 | The result is non-zero if PER_CU was queued, otherwise the result is zero | |
6610 | meaning either PER_CU is already queued or it is already loaded. */ | |
6611 | ||
6612 | static int | |
6613 | maybe_queue_comp_unit (struct dwarf2_cu *this_cu, | |
6614 | struct dwarf2_per_cu_data *per_cu, | |
6615 | enum language pretend_language) | |
6616 | { | |
6617 | /* We may arrive here during partial symbol reading, if we need full | |
6618 | DIEs to process an unusual case (e.g. template arguments). Do | |
6619 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
6620 | if (dwarf2_per_objfile->reading_partial_symbols) | |
6621 | { | |
6622 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
6623 | return 1; | |
6624 | return 0; | |
6625 | } | |
6626 | ||
6627 | /* Mark the dependence relation so that we don't flush PER_CU | |
6628 | too early. */ | |
6629 | dwarf2_add_dependence (this_cu, per_cu); | |
6630 | ||
6631 | /* If it's already on the queue, we have nothing to do. */ | |
6632 | if (per_cu->queued) | |
6633 | return 0; | |
6634 | ||
6635 | /* If the compilation unit is already loaded, just mark it as | |
6636 | used. */ | |
6637 | if (per_cu->cu != NULL) | |
6638 | { | |
6639 | per_cu->cu->last_used = 0; | |
6640 | return 0; | |
6641 | } | |
6642 | ||
6643 | /* Add it to the queue. */ | |
6644 | queue_comp_unit (per_cu, pretend_language); | |
6645 | ||
6646 | return 1; | |
6647 | } | |
6648 | ||
10b3939b DJ |
6649 | /* Process the queue. */ |
6650 | ||
6651 | static void | |
a0f42c21 | 6652 | process_queue (void) |
10b3939b DJ |
6653 | { |
6654 | struct dwarf2_queue_item *item, *next_item; | |
6655 | ||
45cfd468 DE |
6656 | if (dwarf2_read_debug) |
6657 | { | |
6658 | fprintf_unfiltered (gdb_stdlog, | |
6659 | "Expanding one or more symtabs of objfile %s ...\n", | |
6660 | dwarf2_per_objfile->objfile->name); | |
6661 | } | |
6662 | ||
03dd20cc DJ |
6663 | /* The queue starts out with one item, but following a DIE reference |
6664 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
6665 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
6666 | { | |
9291a0cd TT |
6667 | if (dwarf2_per_objfile->using_index |
6668 | ? !item->per_cu->v.quick->symtab | |
6669 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
f4dc4d17 DE |
6670 | { |
6671 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
6672 | ||
6673 | if (dwarf2_read_debug) | |
6674 | { | |
6675 | fprintf_unfiltered (gdb_stdlog, | |
6676 | "Expanding symtab of %s at offset 0x%x\n", | |
6677 | per_cu->is_debug_types ? "TU" : "CU", | |
6678 | per_cu->offset.sect_off); | |
6679 | } | |
6680 | ||
6681 | if (per_cu->is_debug_types) | |
6682 | process_full_type_unit (per_cu, item->pretend_language); | |
6683 | else | |
6684 | process_full_comp_unit (per_cu, item->pretend_language); | |
6685 | ||
6686 | if (dwarf2_read_debug) | |
6687 | { | |
6688 | fprintf_unfiltered (gdb_stdlog, | |
6689 | "Done expanding %s at offset 0x%x\n", | |
6690 | per_cu->is_debug_types ? "TU" : "CU", | |
6691 | per_cu->offset.sect_off); | |
6692 | } | |
6693 | } | |
10b3939b DJ |
6694 | |
6695 | item->per_cu->queued = 0; | |
6696 | next_item = item->next; | |
6697 | xfree (item); | |
6698 | } | |
6699 | ||
6700 | dwarf2_queue_tail = NULL; | |
45cfd468 DE |
6701 | |
6702 | if (dwarf2_read_debug) | |
6703 | { | |
6704 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
6705 | dwarf2_per_objfile->objfile->name); | |
6706 | } | |
10b3939b DJ |
6707 | } |
6708 | ||
6709 | /* Free all allocated queue entries. This function only releases anything if | |
6710 | an error was thrown; if the queue was processed then it would have been | |
6711 | freed as we went along. */ | |
6712 | ||
6713 | static void | |
6714 | dwarf2_release_queue (void *dummy) | |
6715 | { | |
6716 | struct dwarf2_queue_item *item, *last; | |
6717 | ||
6718 | item = dwarf2_queue; | |
6719 | while (item) | |
6720 | { | |
6721 | /* Anything still marked queued is likely to be in an | |
6722 | inconsistent state, so discard it. */ | |
6723 | if (item->per_cu->queued) | |
6724 | { | |
6725 | if (item->per_cu->cu != NULL) | |
dee91e82 | 6726 | free_one_cached_comp_unit (item->per_cu); |
10b3939b DJ |
6727 | item->per_cu->queued = 0; |
6728 | } | |
6729 | ||
6730 | last = item; | |
6731 | item = item->next; | |
6732 | xfree (last); | |
6733 | } | |
6734 | ||
6735 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
6736 | } | |
6737 | ||
6738 | /* Read in full symbols for PST, and anything it depends on. */ | |
6739 | ||
c906108c | 6740 | static void |
fba45db2 | 6741 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 6742 | { |
10b3939b | 6743 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
6744 | int i; |
6745 | ||
95554aad TT |
6746 | if (pst->readin) |
6747 | return; | |
6748 | ||
aaa75496 | 6749 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
6750 | if (!pst->dependencies[i]->readin |
6751 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
6752 | { |
6753 | /* Inform about additional files that need to be read in. */ | |
6754 | if (info_verbose) | |
6755 | { | |
a3f17187 | 6756 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
6757 | fputs_filtered (" ", gdb_stdout); |
6758 | wrap_here (""); | |
6759 | fputs_filtered ("and ", gdb_stdout); | |
6760 | wrap_here (""); | |
6761 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 6762 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
6763 | gdb_flush (gdb_stdout); |
6764 | } | |
6765 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
6766 | } | |
6767 | ||
e38df1d0 | 6768 | per_cu = pst->read_symtab_private; |
10b3939b DJ |
6769 | |
6770 | if (per_cu == NULL) | |
aaa75496 JB |
6771 | { |
6772 | /* It's an include file, no symbols to read for it. | |
6773 | Everything is in the parent symtab. */ | |
6774 | pst->readin = 1; | |
6775 | return; | |
6776 | } | |
c906108c | 6777 | |
a0f42c21 | 6778 | dw2_do_instantiate_symtab (per_cu); |
10b3939b DJ |
6779 | } |
6780 | ||
dee91e82 DE |
6781 | /* Trivial hash function for die_info: the hash value of a DIE |
6782 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 6783 | |
dee91e82 DE |
6784 | static hashval_t |
6785 | die_hash (const void *item) | |
10b3939b | 6786 | { |
dee91e82 | 6787 | const struct die_info *die = item; |
6502dd73 | 6788 | |
dee91e82 DE |
6789 | return die->offset.sect_off; |
6790 | } | |
63d06c5c | 6791 | |
dee91e82 DE |
6792 | /* Trivial comparison function for die_info structures: two DIEs |
6793 | are equal if they have the same offset. */ | |
98bfdba5 | 6794 | |
dee91e82 DE |
6795 | static int |
6796 | die_eq (const void *item_lhs, const void *item_rhs) | |
6797 | { | |
6798 | const struct die_info *die_lhs = item_lhs; | |
6799 | const struct die_info *die_rhs = item_rhs; | |
c906108c | 6800 | |
dee91e82 DE |
6801 | return die_lhs->offset.sect_off == die_rhs->offset.sect_off; |
6802 | } | |
c906108c | 6803 | |
dee91e82 DE |
6804 | /* die_reader_func for load_full_comp_unit. |
6805 | This is identical to read_signatured_type_reader, | |
6806 | but is kept separate for now. */ | |
c906108c | 6807 | |
dee91e82 DE |
6808 | static void |
6809 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6810 | const gdb_byte *info_ptr, |
dee91e82 DE |
6811 | struct die_info *comp_unit_die, |
6812 | int has_children, | |
6813 | void *data) | |
6814 | { | |
6815 | struct dwarf2_cu *cu = reader->cu; | |
95554aad | 6816 | enum language *language_ptr = data; |
6caca83c | 6817 | |
dee91e82 DE |
6818 | gdb_assert (cu->die_hash == NULL); |
6819 | cu->die_hash = | |
6820 | htab_create_alloc_ex (cu->header.length / 12, | |
6821 | die_hash, | |
6822 | die_eq, | |
6823 | NULL, | |
6824 | &cu->comp_unit_obstack, | |
6825 | hashtab_obstack_allocate, | |
6826 | dummy_obstack_deallocate); | |
e142c38c | 6827 | |
dee91e82 DE |
6828 | if (has_children) |
6829 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
6830 | &info_ptr, comp_unit_die); | |
6831 | cu->dies = comp_unit_die; | |
6832 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
6833 | |
6834 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 6835 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 6836 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
6837 | or we won't be able to build types correctly. |
6838 | Similarly, if we do not read the producer, we can not apply | |
6839 | producer-specific interpretation. */ | |
95554aad | 6840 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 6841 | } |
10b3939b | 6842 | |
dee91e82 | 6843 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 6844 | |
dee91e82 | 6845 | static void |
95554aad TT |
6846 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
6847 | enum language pretend_language) | |
dee91e82 | 6848 | { |
3019eac3 | 6849 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 6850 | |
f4dc4d17 DE |
6851 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, |
6852 | load_full_comp_unit_reader, &pretend_language); | |
10b3939b DJ |
6853 | } |
6854 | ||
3da10d80 KS |
6855 | /* Add a DIE to the delayed physname list. */ |
6856 | ||
6857 | static void | |
6858 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
6859 | const char *name, struct die_info *die, | |
6860 | struct dwarf2_cu *cu) | |
6861 | { | |
6862 | struct delayed_method_info mi; | |
6863 | mi.type = type; | |
6864 | mi.fnfield_index = fnfield_index; | |
6865 | mi.index = index; | |
6866 | mi.name = name; | |
6867 | mi.die = die; | |
6868 | VEC_safe_push (delayed_method_info, cu->method_list, &mi); | |
6869 | } | |
6870 | ||
6871 | /* A cleanup for freeing the delayed method list. */ | |
6872 | ||
6873 | static void | |
6874 | free_delayed_list (void *ptr) | |
6875 | { | |
6876 | struct dwarf2_cu *cu = (struct dwarf2_cu *) ptr; | |
6877 | if (cu->method_list != NULL) | |
6878 | { | |
6879 | VEC_free (delayed_method_info, cu->method_list); | |
6880 | cu->method_list = NULL; | |
6881 | } | |
6882 | } | |
6883 | ||
6884 | /* Compute the physnames of any methods on the CU's method list. | |
6885 | ||
6886 | The computation of method physnames is delayed in order to avoid the | |
6887 | (bad) condition that one of the method's formal parameters is of an as yet | |
6888 | incomplete type. */ | |
6889 | ||
6890 | static void | |
6891 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
6892 | { | |
6893 | int i; | |
6894 | struct delayed_method_info *mi; | |
6895 | for (i = 0; VEC_iterate (delayed_method_info, cu->method_list, i, mi) ; ++i) | |
6896 | { | |
1d06ead6 | 6897 | const char *physname; |
3da10d80 KS |
6898 | struct fn_fieldlist *fn_flp |
6899 | = &TYPE_FN_FIELDLIST (mi->type, mi->fnfield_index); | |
7d455152 | 6900 | physname = dwarf2_physname (mi->name, mi->die, cu); |
3da10d80 KS |
6901 | fn_flp->fn_fields[mi->index].physname = physname ? physname : ""; |
6902 | } | |
6903 | } | |
6904 | ||
a766d390 DE |
6905 | /* Go objects should be embedded in a DW_TAG_module DIE, |
6906 | and it's not clear if/how imported objects will appear. | |
6907 | To keep Go support simple until that's worked out, | |
6908 | go back through what we've read and create something usable. | |
6909 | We could do this while processing each DIE, and feels kinda cleaner, | |
6910 | but that way is more invasive. | |
6911 | This is to, for example, allow the user to type "p var" or "b main" | |
6912 | without having to specify the package name, and allow lookups | |
6913 | of module.object to work in contexts that use the expression | |
6914 | parser. */ | |
6915 | ||
6916 | static void | |
6917 | fixup_go_packaging (struct dwarf2_cu *cu) | |
6918 | { | |
6919 | char *package_name = NULL; | |
6920 | struct pending *list; | |
6921 | int i; | |
6922 | ||
6923 | for (list = global_symbols; list != NULL; list = list->next) | |
6924 | { | |
6925 | for (i = 0; i < list->nsyms; ++i) | |
6926 | { | |
6927 | struct symbol *sym = list->symbol[i]; | |
6928 | ||
6929 | if (SYMBOL_LANGUAGE (sym) == language_go | |
6930 | && SYMBOL_CLASS (sym) == LOC_BLOCK) | |
6931 | { | |
6932 | char *this_package_name = go_symbol_package_name (sym); | |
6933 | ||
6934 | if (this_package_name == NULL) | |
6935 | continue; | |
6936 | if (package_name == NULL) | |
6937 | package_name = this_package_name; | |
6938 | else | |
6939 | { | |
6940 | if (strcmp (package_name, this_package_name) != 0) | |
6941 | complaint (&symfile_complaints, | |
6942 | _("Symtab %s has objects from two different Go packages: %s and %s"), | |
210bbc17 | 6943 | (SYMBOL_SYMTAB (sym) |
05cba821 | 6944 | ? symtab_to_filename_for_display (SYMBOL_SYMTAB (sym)) |
a766d390 DE |
6945 | : cu->objfile->name), |
6946 | this_package_name, package_name); | |
6947 | xfree (this_package_name); | |
6948 | } | |
6949 | } | |
6950 | } | |
6951 | } | |
6952 | ||
6953 | if (package_name != NULL) | |
6954 | { | |
6955 | struct objfile *objfile = cu->objfile; | |
10f0c4bb TT |
6956 | const char *saved_package_name = obstack_copy0 (&objfile->objfile_obstack, |
6957 | package_name, | |
6958 | strlen (package_name)); | |
a766d390 | 6959 | struct type *type = init_type (TYPE_CODE_MODULE, 0, 0, |
86f62fd7 | 6960 | saved_package_name, objfile); |
a766d390 DE |
6961 | struct symbol *sym; |
6962 | ||
6963 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
6964 | ||
e623cf5d | 6965 | sym = allocate_symbol (objfile); |
f85f34ed | 6966 | SYMBOL_SET_LANGUAGE (sym, language_go, &objfile->objfile_obstack); |
86f62fd7 TT |
6967 | SYMBOL_SET_NAMES (sym, saved_package_name, |
6968 | strlen (saved_package_name), 0, objfile); | |
a766d390 DE |
6969 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
6970 | e.g., "main" finds the "main" module and not C's main(). */ | |
6971 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 6972 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
6973 | SYMBOL_TYPE (sym) = type; |
6974 | ||
6975 | add_symbol_to_list (sym, &global_symbols); | |
6976 | ||
6977 | xfree (package_name); | |
6978 | } | |
6979 | } | |
6980 | ||
95554aad TT |
6981 | /* Return the symtab for PER_CU. This works properly regardless of |
6982 | whether we're using the index or psymtabs. */ | |
6983 | ||
6984 | static struct symtab * | |
6985 | get_symtab (struct dwarf2_per_cu_data *per_cu) | |
6986 | { | |
6987 | return (dwarf2_per_objfile->using_index | |
6988 | ? per_cu->v.quick->symtab | |
6989 | : per_cu->v.psymtab->symtab); | |
6990 | } | |
6991 | ||
6992 | /* A helper function for computing the list of all symbol tables | |
6993 | included by PER_CU. */ | |
6994 | ||
6995 | static void | |
6996 | recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr) **result, | |
6997 | htab_t all_children, | |
6998 | struct dwarf2_per_cu_data *per_cu) | |
6999 | { | |
7000 | void **slot; | |
7001 | int ix; | |
7002 | struct dwarf2_per_cu_data *iter; | |
7003 | ||
7004 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
7005 | if (*slot != NULL) | |
7006 | { | |
7007 | /* This inclusion and its children have been processed. */ | |
7008 | return; | |
7009 | } | |
7010 | ||
7011 | *slot = per_cu; | |
7012 | /* Only add a CU if it has a symbol table. */ | |
7013 | if (get_symtab (per_cu) != NULL) | |
7014 | VEC_safe_push (dwarf2_per_cu_ptr, *result, per_cu); | |
7015 | ||
7016 | for (ix = 0; | |
796a7ff8 | 7017 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, ix, iter); |
95554aad TT |
7018 | ++ix) |
7019 | recursively_compute_inclusions (result, all_children, iter); | |
7020 | } | |
7021 | ||
7022 | /* Compute the symtab 'includes' fields for the symtab related to | |
7023 | PER_CU. */ | |
7024 | ||
7025 | static void | |
7026 | compute_symtab_includes (struct dwarf2_per_cu_data *per_cu) | |
7027 | { | |
f4dc4d17 DE |
7028 | gdb_assert (! per_cu->is_debug_types); |
7029 | ||
796a7ff8 | 7030 | if (!VEC_empty (dwarf2_per_cu_ptr, per_cu->imported_symtabs)) |
95554aad TT |
7031 | { |
7032 | int ix, len; | |
7033 | struct dwarf2_per_cu_data *iter; | |
7034 | VEC (dwarf2_per_cu_ptr) *result_children = NULL; | |
7035 | htab_t all_children; | |
7036 | struct symtab *symtab = get_symtab (per_cu); | |
7037 | ||
7038 | /* If we don't have a symtab, we can just skip this case. */ | |
7039 | if (symtab == NULL) | |
7040 | return; | |
7041 | ||
7042 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
7043 | NULL, xcalloc, xfree); | |
7044 | ||
7045 | for (ix = 0; | |
796a7ff8 | 7046 | VEC_iterate (dwarf2_per_cu_ptr, per_cu->imported_symtabs, |
95554aad TT |
7047 | ix, iter); |
7048 | ++ix) | |
7049 | recursively_compute_inclusions (&result_children, all_children, iter); | |
7050 | ||
796a7ff8 DE |
7051 | /* Now we have a transitive closure of all the included CUs, and |
7052 | for .gdb_index version 7 the included TUs, so we can convert it | |
7053 | to a list of symtabs. */ | |
95554aad TT |
7054 | len = VEC_length (dwarf2_per_cu_ptr, result_children); |
7055 | symtab->includes | |
7056 | = obstack_alloc (&dwarf2_per_objfile->objfile->objfile_obstack, | |
7057 | (len + 1) * sizeof (struct symtab *)); | |
7058 | for (ix = 0; | |
7059 | VEC_iterate (dwarf2_per_cu_ptr, result_children, ix, iter); | |
7060 | ++ix) | |
7061 | symtab->includes[ix] = get_symtab (iter); | |
7062 | symtab->includes[len] = NULL; | |
7063 | ||
7064 | VEC_free (dwarf2_per_cu_ptr, result_children); | |
7065 | htab_delete (all_children); | |
7066 | } | |
7067 | } | |
7068 | ||
7069 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
7070 | read. */ | |
7071 | ||
7072 | static void | |
7073 | process_cu_includes (void) | |
7074 | { | |
7075 | int ix; | |
7076 | struct dwarf2_per_cu_data *iter; | |
7077 | ||
7078 | for (ix = 0; | |
7079 | VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, | |
7080 | ix, iter); | |
7081 | ++ix) | |
f4dc4d17 DE |
7082 | { |
7083 | if (! iter->is_debug_types) | |
7084 | compute_symtab_includes (iter); | |
7085 | } | |
95554aad TT |
7086 | |
7087 | VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus); | |
7088 | } | |
7089 | ||
9cdd5dbd | 7090 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
7091 | already been loaded into memory. */ |
7092 | ||
7093 | static void | |
95554aad TT |
7094 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
7095 | enum language pretend_language) | |
10b3939b | 7096 | { |
10b3939b | 7097 | struct dwarf2_cu *cu = per_cu->cu; |
9291a0cd | 7098 | struct objfile *objfile = per_cu->objfile; |
10b3939b DJ |
7099 | CORE_ADDR lowpc, highpc; |
7100 | struct symtab *symtab; | |
3da10d80 | 7101 | struct cleanup *back_to, *delayed_list_cleanup; |
10b3939b | 7102 | CORE_ADDR baseaddr; |
4359dff1 | 7103 | struct block *static_block; |
10b3939b DJ |
7104 | |
7105 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
7106 | ||
10b3939b DJ |
7107 | buildsym_init (); |
7108 | back_to = make_cleanup (really_free_pendings, NULL); | |
3da10d80 | 7109 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); |
10b3939b DJ |
7110 | |
7111 | cu->list_in_scope = &file_symbols; | |
c906108c | 7112 | |
95554aad TT |
7113 | cu->language = pretend_language; |
7114 | cu->language_defn = language_def (cu->language); | |
7115 | ||
c906108c | 7116 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 7117 | process_die (cu->dies, cu); |
c906108c | 7118 | |
a766d390 DE |
7119 | /* For now fudge the Go package. */ |
7120 | if (cu->language == language_go) | |
7121 | fixup_go_packaging (cu); | |
7122 | ||
3da10d80 KS |
7123 | /* Now that we have processed all the DIEs in the CU, all the types |
7124 | should be complete, and it should now be safe to compute all of the | |
7125 | physnames. */ | |
7126 | compute_delayed_physnames (cu); | |
7127 | do_cleanups (delayed_list_cleanup); | |
7128 | ||
fae299cd DC |
7129 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
7130 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
7131 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 7132 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 7133 | |
36586728 | 7134 | static_block |
ff546935 | 7135 | = end_symtab_get_static_block (highpc + baseaddr, objfile, 0, 1); |
4359dff1 JK |
7136 | |
7137 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
7138 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
7139 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
7140 | addrmap to help ensure it has an accurate map of pc values belonging to | |
7141 | this comp unit. */ | |
7142 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
7143 | ||
7144 | symtab = end_symtab_from_static_block (static_block, objfile, | |
7145 | SECT_OFF_TEXT (objfile), 0); | |
c906108c | 7146 | |
8be455d7 | 7147 | if (symtab != NULL) |
c906108c | 7148 | { |
df15bd07 | 7149 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 7150 | |
8be455d7 JK |
7151 | /* Set symtab language to language from DW_AT_language. If the |
7152 | compilation is from a C file generated by language preprocessors, do | |
7153 | not set the language if it was already deduced by start_subfile. */ | |
7154 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7155 | symtab->language = cu->language; | |
7156 | ||
7157 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
7158 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
7159 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
7160 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
7161 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
7162 | |
7163 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
7164 | needed, it would be wrong due to missing DW_AT_producer there. | |
7165 | ||
7166 | Still one can confuse GDB by using non-standard GCC compilation | |
7167 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
7168 | */ | |
ab260dad | 7169 | if (cu->has_loclist && gcc_4_minor >= 5) |
8be455d7 | 7170 | symtab->locations_valid = 1; |
e0d00bc7 JK |
7171 | |
7172 | if (gcc_4_minor >= 5) | |
7173 | symtab->epilogue_unwind_valid = 1; | |
96408a79 SA |
7174 | |
7175 | symtab->call_site_htab = cu->call_site_htab; | |
c906108c | 7176 | } |
9291a0cd TT |
7177 | |
7178 | if (dwarf2_per_objfile->using_index) | |
7179 | per_cu->v.quick->symtab = symtab; | |
7180 | else | |
7181 | { | |
7182 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7183 | pst->symtab = symtab; | |
7184 | pst->readin = 1; | |
7185 | } | |
c906108c | 7186 | |
95554aad TT |
7187 | /* Push it for inclusion processing later. */ |
7188 | VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu); | |
7189 | ||
c906108c | 7190 | do_cleanups (back_to); |
f4dc4d17 | 7191 | } |
45cfd468 | 7192 | |
f4dc4d17 DE |
7193 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
7194 | already been loaded into memory. */ | |
7195 | ||
7196 | static void | |
7197 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
7198 | enum language pretend_language) | |
7199 | { | |
7200 | struct dwarf2_cu *cu = per_cu->cu; | |
7201 | struct objfile *objfile = per_cu->objfile; | |
7202 | struct symtab *symtab; | |
7203 | struct cleanup *back_to, *delayed_list_cleanup; | |
0186c6a7 DE |
7204 | struct signatured_type *sig_type; |
7205 | ||
7206 | gdb_assert (per_cu->is_debug_types); | |
7207 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
7208 | |
7209 | buildsym_init (); | |
7210 | back_to = make_cleanup (really_free_pendings, NULL); | |
7211 | delayed_list_cleanup = make_cleanup (free_delayed_list, cu); | |
7212 | ||
7213 | cu->list_in_scope = &file_symbols; | |
7214 | ||
7215 | cu->language = pretend_language; | |
7216 | cu->language_defn = language_def (cu->language); | |
7217 | ||
7218 | /* The symbol tables are set up in read_type_unit_scope. */ | |
7219 | process_die (cu->dies, cu); | |
7220 | ||
7221 | /* For now fudge the Go package. */ | |
7222 | if (cu->language == language_go) | |
7223 | fixup_go_packaging (cu); | |
7224 | ||
7225 | /* Now that we have processed all the DIEs in the CU, all the types | |
7226 | should be complete, and it should now be safe to compute all of the | |
7227 | physnames. */ | |
7228 | compute_delayed_physnames (cu); | |
7229 | do_cleanups (delayed_list_cleanup); | |
7230 | ||
7231 | /* TUs share symbol tables. | |
7232 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
7233 | of it with end_expandable_symtab. Otherwise, complete the addition of |
7234 | this TU's symbols to the existing symtab. */ | |
0186c6a7 | 7235 | if (sig_type->type_unit_group->primary_symtab == NULL) |
45cfd468 | 7236 | { |
f4dc4d17 | 7237 | symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile)); |
0186c6a7 | 7238 | sig_type->type_unit_group->primary_symtab = symtab; |
f4dc4d17 DE |
7239 | |
7240 | if (symtab != NULL) | |
7241 | { | |
7242 | /* Set symtab language to language from DW_AT_language. If the | |
7243 | compilation is from a C file generated by language preprocessors, | |
7244 | do not set the language if it was already deduced by | |
7245 | start_subfile. */ | |
7246 | if (!(cu->language == language_c && symtab->language != language_c)) | |
7247 | symtab->language = cu->language; | |
7248 | } | |
7249 | } | |
7250 | else | |
7251 | { | |
7252 | augment_type_symtab (objfile, | |
0186c6a7 DE |
7253 | sig_type->type_unit_group->primary_symtab); |
7254 | symtab = sig_type->type_unit_group->primary_symtab; | |
f4dc4d17 DE |
7255 | } |
7256 | ||
7257 | if (dwarf2_per_objfile->using_index) | |
7258 | per_cu->v.quick->symtab = symtab; | |
7259 | else | |
7260 | { | |
7261 | struct partial_symtab *pst = per_cu->v.psymtab; | |
7262 | pst->symtab = symtab; | |
7263 | pst->readin = 1; | |
45cfd468 | 7264 | } |
f4dc4d17 DE |
7265 | |
7266 | do_cleanups (back_to); | |
c906108c SS |
7267 | } |
7268 | ||
95554aad TT |
7269 | /* Process an imported unit DIE. */ |
7270 | ||
7271 | static void | |
7272 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
7273 | { | |
7274 | struct attribute *attr; | |
7275 | ||
f4dc4d17 DE |
7276 | /* For now we don't handle imported units in type units. */ |
7277 | if (cu->per_cu->is_debug_types) | |
7278 | { | |
7279 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7280 | " supported in type units [in module %s]"), | |
7281 | cu->objfile->name); | |
7282 | } | |
7283 | ||
95554aad TT |
7284 | attr = dwarf2_attr (die, DW_AT_import, cu); |
7285 | if (attr != NULL) | |
7286 | { | |
7287 | struct dwarf2_per_cu_data *per_cu; | |
7288 | struct symtab *imported_symtab; | |
7289 | sect_offset offset; | |
36586728 | 7290 | int is_dwz; |
95554aad TT |
7291 | |
7292 | offset = dwarf2_get_ref_die_offset (attr); | |
36586728 TT |
7293 | is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
7294 | per_cu = dwarf2_find_containing_comp_unit (offset, is_dwz, cu->objfile); | |
95554aad TT |
7295 | |
7296 | /* Queue the unit, if needed. */ | |
7297 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) | |
7298 | load_full_comp_unit (per_cu, cu->language); | |
7299 | ||
796a7ff8 | 7300 | VEC_safe_push (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs, |
95554aad TT |
7301 | per_cu); |
7302 | } | |
7303 | } | |
7304 | ||
c906108c SS |
7305 | /* Process a die and its children. */ |
7306 | ||
7307 | static void | |
e7c27a73 | 7308 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
7309 | { |
7310 | switch (die->tag) | |
7311 | { | |
7312 | case DW_TAG_padding: | |
7313 | break; | |
7314 | case DW_TAG_compile_unit: | |
95554aad | 7315 | case DW_TAG_partial_unit: |
e7c27a73 | 7316 | read_file_scope (die, cu); |
c906108c | 7317 | break; |
348e048f DE |
7318 | case DW_TAG_type_unit: |
7319 | read_type_unit_scope (die, cu); | |
7320 | break; | |
c906108c | 7321 | case DW_TAG_subprogram: |
c906108c | 7322 | case DW_TAG_inlined_subroutine: |
edb3359d | 7323 | read_func_scope (die, cu); |
c906108c SS |
7324 | break; |
7325 | case DW_TAG_lexical_block: | |
14898363 L |
7326 | case DW_TAG_try_block: |
7327 | case DW_TAG_catch_block: | |
e7c27a73 | 7328 | read_lexical_block_scope (die, cu); |
c906108c | 7329 | break; |
96408a79 SA |
7330 | case DW_TAG_GNU_call_site: |
7331 | read_call_site_scope (die, cu); | |
7332 | break; | |
c906108c | 7333 | case DW_TAG_class_type: |
680b30c7 | 7334 | case DW_TAG_interface_type: |
c906108c SS |
7335 | case DW_TAG_structure_type: |
7336 | case DW_TAG_union_type: | |
134d01f1 | 7337 | process_structure_scope (die, cu); |
c906108c SS |
7338 | break; |
7339 | case DW_TAG_enumeration_type: | |
134d01f1 | 7340 | process_enumeration_scope (die, cu); |
c906108c | 7341 | break; |
134d01f1 | 7342 | |
f792889a DJ |
7343 | /* These dies have a type, but processing them does not create |
7344 | a symbol or recurse to process the children. Therefore we can | |
7345 | read them on-demand through read_type_die. */ | |
c906108c | 7346 | case DW_TAG_subroutine_type: |
72019c9c | 7347 | case DW_TAG_set_type: |
c906108c | 7348 | case DW_TAG_array_type: |
c906108c | 7349 | case DW_TAG_pointer_type: |
c906108c | 7350 | case DW_TAG_ptr_to_member_type: |
c906108c | 7351 | case DW_TAG_reference_type: |
c906108c | 7352 | case DW_TAG_string_type: |
c906108c | 7353 | break; |
134d01f1 | 7354 | |
c906108c | 7355 | case DW_TAG_base_type: |
a02abb62 | 7356 | case DW_TAG_subrange_type: |
cb249c71 | 7357 | case DW_TAG_typedef: |
134d01f1 DJ |
7358 | /* Add a typedef symbol for the type definition, if it has a |
7359 | DW_AT_name. */ | |
f792889a | 7360 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 7361 | break; |
c906108c | 7362 | case DW_TAG_common_block: |
e7c27a73 | 7363 | read_common_block (die, cu); |
c906108c SS |
7364 | break; |
7365 | case DW_TAG_common_inclusion: | |
7366 | break; | |
d9fa45fe | 7367 | case DW_TAG_namespace: |
4d4ec4e5 | 7368 | cu->processing_has_namespace_info = 1; |
e7c27a73 | 7369 | read_namespace (die, cu); |
d9fa45fe | 7370 | break; |
5d7cb8df | 7371 | case DW_TAG_module: |
4d4ec4e5 | 7372 | cu->processing_has_namespace_info = 1; |
5d7cb8df JK |
7373 | read_module (die, cu); |
7374 | break; | |
d9fa45fe DC |
7375 | case DW_TAG_imported_declaration: |
7376 | case DW_TAG_imported_module: | |
4d4ec4e5 | 7377 | cu->processing_has_namespace_info = 1; |
27aa8d6a SW |
7378 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
7379 | || cu->language != language_fortran)) | |
7380 | complaint (&symfile_complaints, _("Tag '%s' has unexpected children"), | |
7381 | dwarf_tag_name (die->tag)); | |
7382 | read_import_statement (die, cu); | |
d9fa45fe | 7383 | break; |
95554aad TT |
7384 | |
7385 | case DW_TAG_imported_unit: | |
7386 | process_imported_unit_die (die, cu); | |
7387 | break; | |
7388 | ||
c906108c | 7389 | default: |
e7c27a73 | 7390 | new_symbol (die, NULL, cu); |
c906108c SS |
7391 | break; |
7392 | } | |
7393 | } | |
ca69b9e6 DE |
7394 | \f |
7395 | /* DWARF name computation. */ | |
c906108c | 7396 | |
94af9270 KS |
7397 | /* A helper function for dwarf2_compute_name which determines whether DIE |
7398 | needs to have the name of the scope prepended to the name listed in the | |
7399 | die. */ | |
7400 | ||
7401 | static int | |
7402 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
7403 | { | |
1c809c68 TT |
7404 | struct attribute *attr; |
7405 | ||
94af9270 KS |
7406 | switch (die->tag) |
7407 | { | |
7408 | case DW_TAG_namespace: | |
7409 | case DW_TAG_typedef: | |
7410 | case DW_TAG_class_type: | |
7411 | case DW_TAG_interface_type: | |
7412 | case DW_TAG_structure_type: | |
7413 | case DW_TAG_union_type: | |
7414 | case DW_TAG_enumeration_type: | |
7415 | case DW_TAG_enumerator: | |
7416 | case DW_TAG_subprogram: | |
7417 | case DW_TAG_member: | |
7418 | return 1; | |
7419 | ||
7420 | case DW_TAG_variable: | |
c2b0a229 | 7421 | case DW_TAG_constant: |
94af9270 KS |
7422 | /* We only need to prefix "globally" visible variables. These include |
7423 | any variable marked with DW_AT_external or any variable that | |
7424 | lives in a namespace. [Variables in anonymous namespaces | |
7425 | require prefixing, but they are not DW_AT_external.] */ | |
7426 | ||
7427 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
7428 | { | |
7429 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 7430 | |
94af9270 KS |
7431 | return die_needs_namespace (die_specification (die, &spec_cu), |
7432 | spec_cu); | |
7433 | } | |
7434 | ||
1c809c68 | 7435 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
7436 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
7437 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
7438 | return 0; |
7439 | /* A variable in a lexical block of some kind does not need a | |
7440 | namespace, even though in C++ such variables may be external | |
7441 | and have a mangled name. */ | |
7442 | if (die->parent->tag == DW_TAG_lexical_block | |
7443 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
7444 | || die->parent->tag == DW_TAG_catch_block |
7445 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
7446 | return 0; |
7447 | return 1; | |
94af9270 KS |
7448 | |
7449 | default: | |
7450 | return 0; | |
7451 | } | |
7452 | } | |
7453 | ||
98bfdba5 PA |
7454 | /* Retrieve the last character from a mem_file. */ |
7455 | ||
7456 | static void | |
7457 | do_ui_file_peek_last (void *object, const char *buffer, long length) | |
7458 | { | |
7459 | char *last_char_p = (char *) object; | |
7460 | ||
7461 | if (length > 0) | |
7462 | *last_char_p = buffer[length - 1]; | |
7463 | } | |
7464 | ||
94af9270 | 7465 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 DE |
7466 | compute the physname for the object, which include a method's: |
7467 | - formal parameters (C++/Java), | |
7468 | - receiver type (Go), | |
7469 | - return type (Java). | |
7470 | ||
7471 | The term "physname" is a bit confusing. | |
7472 | For C++, for example, it is the demangled name. | |
7473 | For Go, for example, it's the mangled name. | |
94af9270 | 7474 | |
af6b7be1 JB |
7475 | For Ada, return the DIE's linkage name rather than the fully qualified |
7476 | name. PHYSNAME is ignored.. | |
7477 | ||
94af9270 KS |
7478 | The result is allocated on the objfile_obstack and canonicalized. */ |
7479 | ||
7480 | static const char * | |
15d034d0 TT |
7481 | dwarf2_compute_name (const char *name, |
7482 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
7483 | int physname) |
7484 | { | |
bb5ed363 DE |
7485 | struct objfile *objfile = cu->objfile; |
7486 | ||
94af9270 KS |
7487 | if (name == NULL) |
7488 | name = dwarf2_name (die, cu); | |
7489 | ||
f55ee35c JK |
7490 | /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise |
7491 | compute it by typename_concat inside GDB. */ | |
7492 | if (cu->language == language_ada | |
7493 | || (cu->language == language_fortran && physname)) | |
7494 | { | |
7495 | /* For Ada unit, we prefer the linkage name over the name, as | |
7496 | the former contains the exported name, which the user expects | |
7497 | to be able to reference. Ideally, we want the user to be able | |
7498 | to reference this entity using either natural or linkage name, | |
7499 | but we haven't started looking at this enhancement yet. */ | |
7500 | struct attribute *attr; | |
7501 | ||
7502 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7503 | if (attr == NULL) | |
7504 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7505 | if (attr && DW_STRING (attr)) | |
7506 | return DW_STRING (attr); | |
7507 | } | |
7508 | ||
94af9270 KS |
7509 | /* These are the only languages we know how to qualify names in. */ |
7510 | if (name != NULL | |
f55ee35c JK |
7511 | && (cu->language == language_cplus || cu->language == language_java |
7512 | || cu->language == language_fortran)) | |
94af9270 KS |
7513 | { |
7514 | if (die_needs_namespace (die, cu)) | |
7515 | { | |
7516 | long length; | |
0d5cff50 | 7517 | const char *prefix; |
94af9270 KS |
7518 | struct ui_file *buf; |
7519 | ||
7520 | prefix = determine_prefix (die, cu); | |
7521 | buf = mem_fileopen (); | |
7522 | if (*prefix != '\0') | |
7523 | { | |
f55ee35c JK |
7524 | char *prefixed_name = typename_concat (NULL, prefix, name, |
7525 | physname, cu); | |
9a619af0 | 7526 | |
94af9270 KS |
7527 | fputs_unfiltered (prefixed_name, buf); |
7528 | xfree (prefixed_name); | |
7529 | } | |
7530 | else | |
62d5b8da | 7531 | fputs_unfiltered (name, buf); |
94af9270 | 7532 | |
98bfdba5 PA |
7533 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
7534 | as children with DW_TAG_template_type_param or | |
7535 | DW_TAG_value_type_param. If the latter, add them to the name | |
7536 | here. If the name already has template parameters, then | |
7537 | skip this step; some versions of GCC emit both, and | |
7538 | it is more efficient to use the pre-computed name. | |
7539 | ||
7540 | Something to keep in mind about this process: it is very | |
7541 | unlikely, or in some cases downright impossible, to produce | |
7542 | something that will match the mangled name of a function. | |
7543 | If the definition of the function has the same debug info, | |
7544 | we should be able to match up with it anyway. But fallbacks | |
7545 | using the minimal symbol, for instance to find a method | |
7546 | implemented in a stripped copy of libstdc++, will not work. | |
7547 | If we do not have debug info for the definition, we will have to | |
7548 | match them up some other way. | |
7549 | ||
7550 | When we do name matching there is a related problem with function | |
7551 | templates; two instantiated function templates are allowed to | |
7552 | differ only by their return types, which we do not add here. */ | |
7553 | ||
7554 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
7555 | { | |
7556 | struct attribute *attr; | |
7557 | struct die_info *child; | |
7558 | int first = 1; | |
7559 | ||
7560 | die->building_fullname = 1; | |
7561 | ||
7562 | for (child = die->child; child != NULL; child = child->sibling) | |
7563 | { | |
7564 | struct type *type; | |
12df843f | 7565 | LONGEST value; |
d521ce57 | 7566 | const gdb_byte *bytes; |
98bfdba5 PA |
7567 | struct dwarf2_locexpr_baton *baton; |
7568 | struct value *v; | |
7569 | ||
7570 | if (child->tag != DW_TAG_template_type_param | |
7571 | && child->tag != DW_TAG_template_value_param) | |
7572 | continue; | |
7573 | ||
7574 | if (first) | |
7575 | { | |
7576 | fputs_unfiltered ("<", buf); | |
7577 | first = 0; | |
7578 | } | |
7579 | else | |
7580 | fputs_unfiltered (", ", buf); | |
7581 | ||
7582 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
7583 | if (attr == NULL) | |
7584 | { | |
7585 | complaint (&symfile_complaints, | |
7586 | _("template parameter missing DW_AT_type")); | |
7587 | fputs_unfiltered ("UNKNOWN_TYPE", buf); | |
7588 | continue; | |
7589 | } | |
7590 | type = die_type (child, cu); | |
7591 | ||
7592 | if (child->tag == DW_TAG_template_type_param) | |
7593 | { | |
79d43c61 | 7594 | c_print_type (type, "", buf, -1, 0, &type_print_raw_options); |
98bfdba5 PA |
7595 | continue; |
7596 | } | |
7597 | ||
7598 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
7599 | if (attr == NULL) | |
7600 | { | |
7601 | complaint (&symfile_complaints, | |
3e43a32a MS |
7602 | _("template parameter missing " |
7603 | "DW_AT_const_value")); | |
98bfdba5 PA |
7604 | fputs_unfiltered ("UNKNOWN_VALUE", buf); |
7605 | continue; | |
7606 | } | |
7607 | ||
7608 | dwarf2_const_value_attr (attr, type, name, | |
7609 | &cu->comp_unit_obstack, cu, | |
7610 | &value, &bytes, &baton); | |
7611 | ||
7612 | if (TYPE_NOSIGN (type)) | |
7613 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
7614 | changed, this can use value_print instead. */ | |
7615 | c_printchar (value, type, buf); | |
7616 | else | |
7617 | { | |
7618 | struct value_print_options opts; | |
7619 | ||
7620 | if (baton != NULL) | |
7621 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
7622 | baton->data, | |
7623 | baton->size, | |
7624 | baton->per_cu); | |
7625 | else if (bytes != NULL) | |
7626 | { | |
7627 | v = allocate_value (type); | |
7628 | memcpy (value_contents_writeable (v), bytes, | |
7629 | TYPE_LENGTH (type)); | |
7630 | } | |
7631 | else | |
7632 | v = value_from_longest (type, value); | |
7633 | ||
3e43a32a MS |
7634 | /* Specify decimal so that we do not depend on |
7635 | the radix. */ | |
98bfdba5 PA |
7636 | get_formatted_print_options (&opts, 'd'); |
7637 | opts.raw = 1; | |
7638 | value_print (v, buf, &opts); | |
7639 | release_value (v); | |
7640 | value_free (v); | |
7641 | } | |
7642 | } | |
7643 | ||
7644 | die->building_fullname = 0; | |
7645 | ||
7646 | if (!first) | |
7647 | { | |
7648 | /* Close the argument list, with a space if necessary | |
7649 | (nested templates). */ | |
7650 | char last_char = '\0'; | |
7651 | ui_file_put (buf, do_ui_file_peek_last, &last_char); | |
7652 | if (last_char == '>') | |
7653 | fputs_unfiltered (" >", buf); | |
7654 | else | |
7655 | fputs_unfiltered (">", buf); | |
7656 | } | |
7657 | } | |
7658 | ||
94af9270 KS |
7659 | /* For Java and C++ methods, append formal parameter type |
7660 | information, if PHYSNAME. */ | |
6e70227d | 7661 | |
94af9270 KS |
7662 | if (physname && die->tag == DW_TAG_subprogram |
7663 | && (cu->language == language_cplus | |
7664 | || cu->language == language_java)) | |
7665 | { | |
7666 | struct type *type = read_type_die (die, cu); | |
7667 | ||
79d43c61 TT |
7668 | c_type_print_args (type, buf, 1, cu->language, |
7669 | &type_print_raw_options); | |
94af9270 KS |
7670 | |
7671 | if (cu->language == language_java) | |
7672 | { | |
7673 | /* For java, we must append the return type to method | |
0963b4bd | 7674 | names. */ |
94af9270 KS |
7675 | if (die->tag == DW_TAG_subprogram) |
7676 | java_print_type (TYPE_TARGET_TYPE (type), "", buf, | |
79d43c61 | 7677 | 0, 0, &type_print_raw_options); |
94af9270 KS |
7678 | } |
7679 | else if (cu->language == language_cplus) | |
7680 | { | |
60430eff DJ |
7681 | /* Assume that an artificial first parameter is |
7682 | "this", but do not crash if it is not. RealView | |
7683 | marks unnamed (and thus unused) parameters as | |
7684 | artificial; there is no way to differentiate | |
7685 | the two cases. */ | |
94af9270 KS |
7686 | if (TYPE_NFIELDS (type) > 0 |
7687 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 7688 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
7689 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
7690 | 0)))) | |
94af9270 KS |
7691 | fputs_unfiltered (" const", buf); |
7692 | } | |
7693 | } | |
7694 | ||
bb5ed363 | 7695 | name = ui_file_obsavestring (buf, &objfile->objfile_obstack, |
94af9270 KS |
7696 | &length); |
7697 | ui_file_delete (buf); | |
7698 | ||
7699 | if (cu->language == language_cplus) | |
7700 | { | |
15d034d0 | 7701 | const char *cname |
94af9270 | 7702 | = dwarf2_canonicalize_name (name, cu, |
bb5ed363 | 7703 | &objfile->objfile_obstack); |
9a619af0 | 7704 | |
94af9270 KS |
7705 | if (cname != NULL) |
7706 | name = cname; | |
7707 | } | |
7708 | } | |
7709 | } | |
7710 | ||
7711 | return name; | |
7712 | } | |
7713 | ||
0114d602 DJ |
7714 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
7715 | If scope qualifiers are appropriate they will be added. The result | |
7716 | will be allocated on the objfile_obstack, or NULL if the DIE does | |
94af9270 KS |
7717 | not have a name. NAME may either be from a previous call to |
7718 | dwarf2_name or NULL. | |
7719 | ||
0963b4bd | 7720 | The output string will be canonicalized (if C++/Java). */ |
0114d602 DJ |
7721 | |
7722 | static const char * | |
15d034d0 | 7723 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 7724 | { |
94af9270 KS |
7725 | return dwarf2_compute_name (name, die, cu, 0); |
7726 | } | |
0114d602 | 7727 | |
94af9270 KS |
7728 | /* Construct a physname for the given DIE in CU. NAME may either be |
7729 | from a previous call to dwarf2_name or NULL. The result will be | |
7730 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
7731 | name. | |
0114d602 | 7732 | |
94af9270 | 7733 | The output string will be canonicalized (if C++/Java). */ |
0114d602 | 7734 | |
94af9270 | 7735 | static const char * |
15d034d0 | 7736 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 7737 | { |
bb5ed363 | 7738 | struct objfile *objfile = cu->objfile; |
900e11f9 JK |
7739 | struct attribute *attr; |
7740 | const char *retval, *mangled = NULL, *canon = NULL; | |
7741 | struct cleanup *back_to; | |
7742 | int need_copy = 1; | |
7743 | ||
7744 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
7745 | on its own. */ | |
7746 | if (!die_needs_namespace (die, cu)) | |
7747 | return dwarf2_compute_name (name, die, cu, 1); | |
7748 | ||
7749 | back_to = make_cleanup (null_cleanup, NULL); | |
7750 | ||
7751 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
7752 | if (!attr) | |
7753 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
7754 | ||
7755 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
7756 | has computed. */ | |
7757 | if (attr && DW_STRING (attr)) | |
7758 | { | |
7759 | char *demangled; | |
7760 | ||
7761 | mangled = DW_STRING (attr); | |
7762 | ||
7763 | /* Use DMGL_RET_DROP for C++ template functions to suppress their return | |
7764 | type. It is easier for GDB users to search for such functions as | |
7765 | `name(params)' than `long name(params)'. In such case the minimal | |
7766 | symbol names do not match the full symbol names but for template | |
7767 | functions there is never a need to look up their definition from their | |
7768 | declaration so the only disadvantage remains the minimal symbol | |
7769 | variant `long name(params)' does not have the proper inferior type. | |
7770 | */ | |
7771 | ||
a766d390 DE |
7772 | if (cu->language == language_go) |
7773 | { | |
7774 | /* This is a lie, but we already lie to the caller new_symbol_full. | |
7775 | new_symbol_full assumes we return the mangled name. | |
7776 | This just undoes that lie until things are cleaned up. */ | |
7777 | demangled = NULL; | |
7778 | } | |
7779 | else | |
7780 | { | |
8de20a37 TT |
7781 | demangled = gdb_demangle (mangled, |
7782 | (DMGL_PARAMS | DMGL_ANSI | |
7783 | | (cu->language == language_java | |
7784 | ? DMGL_JAVA | DMGL_RET_POSTFIX | |
7785 | : DMGL_RET_DROP))); | |
a766d390 | 7786 | } |
900e11f9 JK |
7787 | if (demangled) |
7788 | { | |
7789 | make_cleanup (xfree, demangled); | |
7790 | canon = demangled; | |
7791 | } | |
7792 | else | |
7793 | { | |
7794 | canon = mangled; | |
7795 | need_copy = 0; | |
7796 | } | |
7797 | } | |
7798 | ||
7799 | if (canon == NULL || check_physname) | |
7800 | { | |
7801 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
7802 | ||
7803 | if (canon != NULL && strcmp (physname, canon) != 0) | |
7804 | { | |
7805 | /* It may not mean a bug in GDB. The compiler could also | |
7806 | compute DW_AT_linkage_name incorrectly. But in such case | |
7807 | GDB would need to be bug-to-bug compatible. */ | |
7808 | ||
7809 | complaint (&symfile_complaints, | |
7810 | _("Computed physname <%s> does not match demangled <%s> " | |
7811 | "(from linkage <%s>) - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7812 | physname, canon, mangled, die->offset.sect_off, objfile->name); |
900e11f9 JK |
7813 | |
7814 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
7815 | is available here - over computed PHYSNAME. It is safer | |
7816 | against both buggy GDB and buggy compilers. */ | |
7817 | ||
7818 | retval = canon; | |
7819 | } | |
7820 | else | |
7821 | { | |
7822 | retval = physname; | |
7823 | need_copy = 0; | |
7824 | } | |
7825 | } | |
7826 | else | |
7827 | retval = canon; | |
7828 | ||
7829 | if (need_copy) | |
10f0c4bb | 7830 | retval = obstack_copy0 (&objfile->objfile_obstack, retval, strlen (retval)); |
900e11f9 JK |
7831 | |
7832 | do_cleanups (back_to); | |
7833 | return retval; | |
0114d602 DJ |
7834 | } |
7835 | ||
27aa8d6a SW |
7836 | /* Read the import statement specified by the given die and record it. */ |
7837 | ||
7838 | static void | |
7839 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
7840 | { | |
bb5ed363 | 7841 | struct objfile *objfile = cu->objfile; |
27aa8d6a | 7842 | struct attribute *import_attr; |
32019081 | 7843 | struct die_info *imported_die, *child_die; |
de4affc9 | 7844 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 7845 | const char *imported_name; |
794684b6 | 7846 | const char *imported_name_prefix; |
13387711 SW |
7847 | const char *canonical_name; |
7848 | const char *import_alias; | |
7849 | const char *imported_declaration = NULL; | |
794684b6 | 7850 | const char *import_prefix; |
32019081 JK |
7851 | VEC (const_char_ptr) *excludes = NULL; |
7852 | struct cleanup *cleanups; | |
13387711 | 7853 | |
27aa8d6a SW |
7854 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
7855 | if (import_attr == NULL) | |
7856 | { | |
7857 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7858 | dwarf_tag_name (die->tag)); | |
7859 | return; | |
7860 | } | |
7861 | ||
de4affc9 CC |
7862 | imported_cu = cu; |
7863 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
7864 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
7865 | if (imported_name == NULL) |
7866 | { | |
7867 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
7868 | ||
7869 | The import in the following code: | |
7870 | namespace A | |
7871 | { | |
7872 | typedef int B; | |
7873 | } | |
7874 | ||
7875 | int main () | |
7876 | { | |
7877 | using A::B; | |
7878 | B b; | |
7879 | return b; | |
7880 | } | |
7881 | ||
7882 | ... | |
7883 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
7884 | <52> DW_AT_decl_file : 1 | |
7885 | <53> DW_AT_decl_line : 6 | |
7886 | <54> DW_AT_import : <0x75> | |
7887 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
7888 | <59> DW_AT_name : B | |
7889 | <5b> DW_AT_decl_file : 1 | |
7890 | <5c> DW_AT_decl_line : 2 | |
7891 | <5d> DW_AT_type : <0x6e> | |
7892 | ... | |
7893 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
7894 | <76> DW_AT_byte_size : 4 | |
7895 | <77> DW_AT_encoding : 5 (signed) | |
7896 | ||
7897 | imports the wrong die ( 0x75 instead of 0x58 ). | |
7898 | This case will be ignored until the gcc bug is fixed. */ | |
7899 | return; | |
7900 | } | |
7901 | ||
82856980 SW |
7902 | /* Figure out the local name after import. */ |
7903 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 7904 | |
794684b6 SW |
7905 | /* Figure out where the statement is being imported to. */ |
7906 | import_prefix = determine_prefix (die, cu); | |
7907 | ||
7908 | /* Figure out what the scope of the imported die is and prepend it | |
7909 | to the name of the imported die. */ | |
de4affc9 | 7910 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 7911 | |
f55ee35c JK |
7912 | if (imported_die->tag != DW_TAG_namespace |
7913 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 7914 | { |
13387711 SW |
7915 | imported_declaration = imported_name; |
7916 | canonical_name = imported_name_prefix; | |
794684b6 | 7917 | } |
13387711 | 7918 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 TT |
7919 | canonical_name = obconcat (&objfile->objfile_obstack, |
7920 | imported_name_prefix, "::", imported_name, | |
7921 | (char *) NULL); | |
13387711 SW |
7922 | else |
7923 | canonical_name = imported_name; | |
794684b6 | 7924 | |
32019081 JK |
7925 | cleanups = make_cleanup (VEC_cleanup (const_char_ptr), &excludes); |
7926 | ||
7927 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) | |
7928 | for (child_die = die->child; child_die && child_die->tag; | |
7929 | child_die = sibling_die (child_die)) | |
7930 | { | |
7931 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
7932 | represented by an imported module entry with an import attribute | |
7933 | referring to the module and owned entries corresponding to those | |
7934 | entities that are renamed as part of being imported. */ | |
7935 | ||
7936 | if (child_die->tag != DW_TAG_imported_declaration) | |
7937 | { | |
7938 | complaint (&symfile_complaints, | |
7939 | _("child DW_TAG_imported_declaration expected " | |
7940 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7941 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7942 | continue; |
7943 | } | |
7944 | ||
7945 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
7946 | if (import_attr == NULL) | |
7947 | { | |
7948 | complaint (&symfile_complaints, _("Tag '%s' has no DW_AT_import"), | |
7949 | dwarf_tag_name (child_die->tag)); | |
7950 | continue; | |
7951 | } | |
7952 | ||
7953 | imported_cu = cu; | |
7954 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
7955 | &imported_cu); | |
7956 | imported_name = dwarf2_name (imported_die, imported_cu); | |
7957 | if (imported_name == NULL) | |
7958 | { | |
7959 | complaint (&symfile_complaints, | |
7960 | _("child DW_TAG_imported_declaration has unknown " | |
7961 | "imported name - DIE at 0x%x [in module %s]"), | |
b64f50a1 | 7962 | child_die->offset.sect_off, objfile->name); |
32019081 JK |
7963 | continue; |
7964 | } | |
7965 | ||
7966 | VEC_safe_push (const_char_ptr, excludes, imported_name); | |
7967 | ||
7968 | process_die (child_die, cu); | |
7969 | } | |
7970 | ||
c0cc3a76 SW |
7971 | cp_add_using_directive (import_prefix, |
7972 | canonical_name, | |
7973 | import_alias, | |
13387711 | 7974 | imported_declaration, |
32019081 | 7975 | excludes, |
12aaed36 | 7976 | 0, |
bb5ed363 | 7977 | &objfile->objfile_obstack); |
32019081 JK |
7978 | |
7979 | do_cleanups (cleanups); | |
27aa8d6a SW |
7980 | } |
7981 | ||
f4dc4d17 | 7982 | /* Cleanup function for handle_DW_AT_stmt_list. */ |
ae2de4f8 | 7983 | |
cb1df416 DJ |
7984 | static void |
7985 | free_cu_line_header (void *arg) | |
7986 | { | |
7987 | struct dwarf2_cu *cu = arg; | |
7988 | ||
7989 | free_line_header (cu->line_header); | |
7990 | cu->line_header = NULL; | |
7991 | } | |
7992 | ||
1b80a9fa JK |
7993 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
7994 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
7995 | this, it was first present in GCC release 4.3.0. */ | |
7996 | ||
7997 | static int | |
7998 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) | |
7999 | { | |
8000 | if (!cu->checked_producer) | |
8001 | check_producer (cu); | |
8002 | ||
8003 | return cu->producer_is_gcc_lt_4_3; | |
8004 | } | |
8005 | ||
9291a0cd TT |
8006 | static void |
8007 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu, | |
15d034d0 | 8008 | const char **name, const char **comp_dir) |
9291a0cd TT |
8009 | { |
8010 | struct attribute *attr; | |
8011 | ||
8012 | *name = NULL; | |
8013 | *comp_dir = NULL; | |
8014 | ||
8015 | /* Find the filename. Do not use dwarf2_name here, since the filename | |
8016 | is not a source language identifier. */ | |
8017 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
8018 | if (attr) | |
8019 | { | |
8020 | *name = DW_STRING (attr); | |
8021 | } | |
8022 | ||
8023 | attr = dwarf2_attr (die, DW_AT_comp_dir, cu); | |
8024 | if (attr) | |
8025 | *comp_dir = DW_STRING (attr); | |
1b80a9fa JK |
8026 | else if (producer_is_gcc_lt_4_3 (cu) && *name != NULL |
8027 | && IS_ABSOLUTE_PATH (*name)) | |
9291a0cd | 8028 | { |
15d034d0 TT |
8029 | char *d = ldirname (*name); |
8030 | ||
8031 | *comp_dir = d; | |
8032 | if (d != NULL) | |
8033 | make_cleanup (xfree, d); | |
9291a0cd TT |
8034 | } |
8035 | if (*comp_dir != NULL) | |
8036 | { | |
8037 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
8038 | directory, get rid of it. */ | |
8039 | char *cp = strchr (*comp_dir, ':'); | |
8040 | ||
8041 | if (cp && cp != *comp_dir && cp[-1] == '.' && cp[1] == '/') | |
8042 | *comp_dir = cp + 1; | |
8043 | } | |
8044 | ||
8045 | if (*name == NULL) | |
8046 | *name = "<unknown>"; | |
8047 | } | |
8048 | ||
f4dc4d17 DE |
8049 | /* Handle DW_AT_stmt_list for a compilation unit. |
8050 | DIE is the DW_TAG_compile_unit die for CU. | |
f3f5162e DE |
8051 | COMP_DIR is the compilation directory. |
8052 | WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */ | |
2ab95328 TT |
8053 | |
8054 | static void | |
8055 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
f4dc4d17 | 8056 | const char *comp_dir) |
2ab95328 TT |
8057 | { |
8058 | struct attribute *attr; | |
2ab95328 | 8059 | |
f4dc4d17 DE |
8060 | gdb_assert (! cu->per_cu->is_debug_types); |
8061 | ||
2ab95328 TT |
8062 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
8063 | if (attr) | |
8064 | { | |
8065 | unsigned int line_offset = DW_UNSND (attr); | |
8066 | struct line_header *line_header | |
3019eac3 | 8067 | = dwarf_decode_line_header (line_offset, cu); |
2ab95328 TT |
8068 | |
8069 | if (line_header) | |
dee91e82 DE |
8070 | { |
8071 | cu->line_header = line_header; | |
8072 | make_cleanup (free_cu_line_header, cu); | |
f4dc4d17 | 8073 | dwarf_decode_lines (line_header, comp_dir, cu, NULL, 1); |
dee91e82 | 8074 | } |
2ab95328 TT |
8075 | } |
8076 | } | |
8077 | ||
95554aad | 8078 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 8079 | |
c906108c | 8080 | static void |
e7c27a73 | 8081 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 8082 | { |
dee91e82 | 8083 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
debd256d | 8084 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
2acceee2 | 8085 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
8086 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
8087 | struct attribute *attr; | |
15d034d0 TT |
8088 | const char *name = NULL; |
8089 | const char *comp_dir = NULL; | |
c906108c SS |
8090 | struct die_info *child_die; |
8091 | bfd *abfd = objfile->obfd; | |
e142c38c | 8092 | CORE_ADDR baseaddr; |
6e70227d | 8093 | |
e142c38c | 8094 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
c906108c | 8095 | |
fae299cd | 8096 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
8097 | |
8098 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
8099 | from finish_block. */ | |
2acceee2 | 8100 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c SS |
8101 | lowpc = highpc; |
8102 | lowpc += baseaddr; | |
8103 | highpc += baseaddr; | |
8104 | ||
9291a0cd | 8105 | find_file_and_directory (die, cu, &name, &comp_dir); |
e1024ff1 | 8106 | |
95554aad | 8107 | prepare_one_comp_unit (cu, die, cu->language); |
303b6f5d | 8108 | |
f4b8a18d KW |
8109 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
8110 | standardised yet. As a workaround for the language detection we fall | |
8111 | back to the DW_AT_producer string. */ | |
8112 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
8113 | cu->language = language_opencl; | |
8114 | ||
3019eac3 DE |
8115 | /* Similar hack for Go. */ |
8116 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
8117 | set_cu_language (DW_LANG_Go, cu); | |
8118 | ||
f4dc4d17 | 8119 | dwarf2_start_symtab (cu, name, comp_dir, lowpc); |
3019eac3 DE |
8120 | |
8121 | /* Decode line number information if present. We do this before | |
8122 | processing child DIEs, so that the line header table is available | |
8123 | for DW_AT_decl_file. */ | |
f4dc4d17 | 8124 | handle_DW_AT_stmt_list (die, cu, comp_dir); |
3019eac3 DE |
8125 | |
8126 | /* Process all dies in compilation unit. */ | |
8127 | if (die->child != NULL) | |
8128 | { | |
8129 | child_die = die->child; | |
8130 | while (child_die && child_die->tag) | |
8131 | { | |
8132 | process_die (child_die, cu); | |
8133 | child_die = sibling_die (child_die); | |
8134 | } | |
8135 | } | |
8136 | ||
8137 | /* Decode macro information, if present. Dwarf 2 macro information | |
8138 | refers to information in the line number info statement program | |
8139 | header, so we can only read it if we've read the header | |
8140 | successfully. */ | |
8141 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
8142 | if (attr && cu->line_header) | |
8143 | { | |
8144 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
8145 | complaint (&symfile_complaints, | |
8146 | _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info")); | |
8147 | ||
09262596 | 8148 | dwarf_decode_macros (cu, DW_UNSND (attr), comp_dir, 1); |
3019eac3 DE |
8149 | } |
8150 | else | |
8151 | { | |
8152 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
8153 | if (attr && cu->line_header) | |
8154 | { | |
8155 | unsigned int macro_offset = DW_UNSND (attr); | |
8156 | ||
09262596 | 8157 | dwarf_decode_macros (cu, macro_offset, comp_dir, 0); |
3019eac3 DE |
8158 | } |
8159 | } | |
8160 | ||
8161 | do_cleanups (back_to); | |
8162 | } | |
8163 | ||
f4dc4d17 DE |
8164 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
8165 | Create the set of symtabs used by this TU, or if this TU is sharing | |
8166 | symtabs with another TU and the symtabs have already been created | |
8167 | then restore those symtabs in the line header. | |
8168 | We don't need the pc/line-number mapping for type units. */ | |
3019eac3 DE |
8169 | |
8170 | static void | |
f4dc4d17 | 8171 | setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu) |
3019eac3 | 8172 | { |
f4dc4d17 DE |
8173 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8174 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
8175 | struct type_unit_group *tu_group; | |
8176 | int first_time; | |
8177 | struct line_header *lh; | |
3019eac3 | 8178 | struct attribute *attr; |
f4dc4d17 | 8179 | unsigned int i, line_offset; |
0186c6a7 | 8180 | struct signatured_type *sig_type; |
3019eac3 | 8181 | |
f4dc4d17 | 8182 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 8183 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 8184 | |
f4dc4d17 | 8185 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
3019eac3 | 8186 | |
f4dc4d17 | 8187 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 8188 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 DE |
8189 | if (sig_type->type_unit_group == NULL) |
8190 | sig_type->type_unit_group = get_type_unit_group (cu, attr); | |
8191 | tu_group = sig_type->type_unit_group; | |
f4dc4d17 DE |
8192 | |
8193 | /* If we've already processed this stmt_list there's no real need to | |
8194 | do it again, we could fake it and just recreate the part we need | |
8195 | (file name,index -> symtab mapping). If data shows this optimization | |
8196 | is useful we can do it then. */ | |
8197 | first_time = tu_group->primary_symtab == NULL; | |
8198 | ||
8199 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
8200 | debug info. */ | |
8201 | lh = NULL; | |
8202 | if (attr != NULL) | |
3019eac3 | 8203 | { |
f4dc4d17 DE |
8204 | line_offset = DW_UNSND (attr); |
8205 | lh = dwarf_decode_line_header (line_offset, cu); | |
8206 | } | |
8207 | if (lh == NULL) | |
8208 | { | |
8209 | if (first_time) | |
8210 | dwarf2_start_symtab (cu, "", NULL, 0); | |
8211 | else | |
8212 | { | |
8213 | gdb_assert (tu_group->symtabs == NULL); | |
8214 | restart_symtab (0); | |
8215 | } | |
8216 | /* Note: The primary symtab will get allocated at the end. */ | |
8217 | return; | |
3019eac3 DE |
8218 | } |
8219 | ||
f4dc4d17 DE |
8220 | cu->line_header = lh; |
8221 | make_cleanup (free_cu_line_header, cu); | |
3019eac3 | 8222 | |
f4dc4d17 DE |
8223 | if (first_time) |
8224 | { | |
8225 | dwarf2_start_symtab (cu, "", NULL, 0); | |
3019eac3 | 8226 | |
f4dc4d17 DE |
8227 | tu_group->num_symtabs = lh->num_file_names; |
8228 | tu_group->symtabs = XNEWVEC (struct symtab *, lh->num_file_names); | |
3019eac3 | 8229 | |
f4dc4d17 DE |
8230 | for (i = 0; i < lh->num_file_names; ++i) |
8231 | { | |
d521ce57 | 8232 | const char *dir = NULL; |
f4dc4d17 | 8233 | struct file_entry *fe = &lh->file_names[i]; |
3019eac3 | 8234 | |
f4dc4d17 DE |
8235 | if (fe->dir_index) |
8236 | dir = lh->include_dirs[fe->dir_index - 1]; | |
8237 | dwarf2_start_subfile (fe->name, dir, NULL); | |
3019eac3 | 8238 | |
f4dc4d17 DE |
8239 | /* Note: We don't have to watch for the main subfile here, type units |
8240 | don't have DW_AT_name. */ | |
3019eac3 | 8241 | |
f4dc4d17 DE |
8242 | if (current_subfile->symtab == NULL) |
8243 | { | |
8244 | /* NOTE: start_subfile will recognize when it's been passed | |
8245 | a file it has already seen. So we can't assume there's a | |
8246 | simple mapping from lh->file_names to subfiles, | |
8247 | lh->file_names may contain dups. */ | |
8248 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
8249 | objfile); | |
8250 | } | |
8251 | ||
8252 | fe->symtab = current_subfile->symtab; | |
8253 | tu_group->symtabs[i] = fe->symtab; | |
8254 | } | |
8255 | } | |
8256 | else | |
3019eac3 | 8257 | { |
f4dc4d17 DE |
8258 | restart_symtab (0); |
8259 | ||
8260 | for (i = 0; i < lh->num_file_names; ++i) | |
8261 | { | |
8262 | struct file_entry *fe = &lh->file_names[i]; | |
8263 | ||
8264 | fe->symtab = tu_group->symtabs[i]; | |
8265 | } | |
3019eac3 DE |
8266 | } |
8267 | ||
f4dc4d17 DE |
8268 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
8269 | so they don't have a "real" (so to speak) symtab anyway. | |
8270 | There is later code that will assign the main symtab to all symbols | |
8271 | that don't have one. We need to handle the case of a symbol with a | |
8272 | missing symtab (DW_AT_decl_file) anyway. */ | |
8273 | } | |
3019eac3 | 8274 | |
f4dc4d17 DE |
8275 | /* Process DW_TAG_type_unit. |
8276 | For TUs we want to skip the first top level sibling if it's not the | |
8277 | actual type being defined by this TU. In this case the first top | |
8278 | level sibling is there to provide context only. */ | |
3019eac3 | 8279 | |
f4dc4d17 DE |
8280 | static void |
8281 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
8282 | { | |
8283 | struct die_info *child_die; | |
3019eac3 | 8284 | |
f4dc4d17 DE |
8285 | prepare_one_comp_unit (cu, die, language_minimal); |
8286 | ||
8287 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
8288 | We do this before processing child DIEs, so that the line header table | |
8289 | is available for DW_AT_decl_file. */ | |
8290 | setup_type_unit_groups (die, cu); | |
8291 | ||
8292 | if (die->child != NULL) | |
8293 | { | |
8294 | child_die = die->child; | |
8295 | while (child_die && child_die->tag) | |
8296 | { | |
8297 | process_die (child_die, cu); | |
8298 | child_die = sibling_die (child_die); | |
8299 | } | |
8300 | } | |
3019eac3 DE |
8301 | } |
8302 | \f | |
80626a55 DE |
8303 | /* DWO/DWP files. |
8304 | ||
8305 | http://gcc.gnu.org/wiki/DebugFission | |
8306 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
8307 | ||
8308 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
8309 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
8310 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
8311 | |
8312 | static hashval_t | |
8313 | hash_dwo_file (const void *item) | |
8314 | { | |
8315 | const struct dwo_file *dwo_file = item; | |
8316 | ||
0ac5b59e DE |
8317 | return (htab_hash_string (dwo_file->dwo_name) |
8318 | + htab_hash_string (dwo_file->comp_dir)); | |
3019eac3 DE |
8319 | } |
8320 | ||
8321 | static int | |
8322 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
8323 | { | |
8324 | const struct dwo_file *lhs = item_lhs; | |
8325 | const struct dwo_file *rhs = item_rhs; | |
8326 | ||
0ac5b59e DE |
8327 | return (strcmp (lhs->dwo_name, rhs->dwo_name) == 0 |
8328 | && strcmp (lhs->comp_dir, rhs->comp_dir) == 0); | |
3019eac3 DE |
8329 | } |
8330 | ||
8331 | /* Allocate a hash table for DWO files. */ | |
8332 | ||
8333 | static htab_t | |
8334 | allocate_dwo_file_hash_table (void) | |
8335 | { | |
8336 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8337 | ||
8338 | return htab_create_alloc_ex (41, | |
8339 | hash_dwo_file, | |
8340 | eq_dwo_file, | |
8341 | NULL, | |
8342 | &objfile->objfile_obstack, | |
8343 | hashtab_obstack_allocate, | |
8344 | dummy_obstack_deallocate); | |
8345 | } | |
8346 | ||
80626a55 DE |
8347 | /* Lookup DWO file DWO_NAME. */ |
8348 | ||
8349 | static void ** | |
0ac5b59e | 8350 | lookup_dwo_file_slot (const char *dwo_name, const char *comp_dir) |
80626a55 DE |
8351 | { |
8352 | struct dwo_file find_entry; | |
8353 | void **slot; | |
8354 | ||
8355 | if (dwarf2_per_objfile->dwo_files == NULL) | |
8356 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); | |
8357 | ||
8358 | memset (&find_entry, 0, sizeof (find_entry)); | |
0ac5b59e DE |
8359 | find_entry.dwo_name = dwo_name; |
8360 | find_entry.comp_dir = comp_dir; | |
80626a55 DE |
8361 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files, &find_entry, INSERT); |
8362 | ||
8363 | return slot; | |
8364 | } | |
8365 | ||
3019eac3 DE |
8366 | static hashval_t |
8367 | hash_dwo_unit (const void *item) | |
8368 | { | |
8369 | const struct dwo_unit *dwo_unit = item; | |
8370 | ||
8371 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
8372 | return dwo_unit->signature; | |
8373 | } | |
8374 | ||
8375 | static int | |
8376 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
8377 | { | |
8378 | const struct dwo_unit *lhs = item_lhs; | |
8379 | const struct dwo_unit *rhs = item_rhs; | |
8380 | ||
8381 | /* The signature is assumed to be unique within the DWO file. | |
8382 | So while object file CU dwo_id's always have the value zero, | |
8383 | that's OK, assuming each object file DWO file has only one CU, | |
8384 | and that's the rule for now. */ | |
8385 | return lhs->signature == rhs->signature; | |
8386 | } | |
8387 | ||
8388 | /* Allocate a hash table for DWO CUs,TUs. | |
8389 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
8390 | ||
8391 | static htab_t | |
8392 | allocate_dwo_unit_table (struct objfile *objfile) | |
8393 | { | |
8394 | /* Start out with a pretty small number. | |
8395 | Generally DWO files contain only one CU and maybe some TUs. */ | |
8396 | return htab_create_alloc_ex (3, | |
8397 | hash_dwo_unit, | |
8398 | eq_dwo_unit, | |
8399 | NULL, | |
8400 | &objfile->objfile_obstack, | |
8401 | hashtab_obstack_allocate, | |
8402 | dummy_obstack_deallocate); | |
8403 | } | |
8404 | ||
80626a55 | 8405 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 8406 | |
19c3d4c9 | 8407 | struct create_dwo_cu_data |
3019eac3 DE |
8408 | { |
8409 | struct dwo_file *dwo_file; | |
19c3d4c9 | 8410 | struct dwo_unit dwo_unit; |
3019eac3 DE |
8411 | }; |
8412 | ||
19c3d4c9 | 8413 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
8414 | |
8415 | static void | |
19c3d4c9 DE |
8416 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
8417 | const gdb_byte *info_ptr, | |
8418 | struct die_info *comp_unit_die, | |
8419 | int has_children, | |
8420 | void *datap) | |
3019eac3 DE |
8421 | { |
8422 | struct dwarf2_cu *cu = reader->cu; | |
8423 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8424 | sect_offset offset = cu->per_cu->offset; | |
8a0459fd | 8425 | struct dwarf2_section_info *section = cu->per_cu->section; |
19c3d4c9 | 8426 | struct create_dwo_cu_data *data = datap; |
3019eac3 | 8427 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 8428 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 8429 | struct attribute *attr; |
3019eac3 DE |
8430 | |
8431 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
8432 | if (attr == NULL) | |
8433 | { | |
19c3d4c9 DE |
8434 | complaint (&symfile_complaints, |
8435 | _("Dwarf Error: debug entry at offset 0x%x is missing" | |
8436 | " its dwo_id [in module %s]"), | |
8437 | offset.sect_off, dwo_file->dwo_name); | |
3019eac3 DE |
8438 | return; |
8439 | } | |
8440 | ||
3019eac3 DE |
8441 | dwo_unit->dwo_file = dwo_file; |
8442 | dwo_unit->signature = DW_UNSND (attr); | |
8a0459fd | 8443 | dwo_unit->section = section; |
3019eac3 DE |
8444 | dwo_unit->offset = offset; |
8445 | dwo_unit->length = cu->per_cu->length; | |
8446 | ||
09406207 | 8447 | if (dwarf2_read_debug) |
4031ecc5 DE |
8448 | fprintf_unfiltered (gdb_stdlog, " offset 0x%x, dwo_id %s\n", |
8449 | offset.sect_off, hex_string (dwo_unit->signature)); | |
3019eac3 DE |
8450 | } |
8451 | ||
19c3d4c9 DE |
8452 | /* Create the dwo_unit for the lone CU in DWO_FILE. |
8453 | Note: This function processes DWO files only, not DWP files. */ | |
3019eac3 | 8454 | |
19c3d4c9 DE |
8455 | static struct dwo_unit * |
8456 | create_dwo_cu (struct dwo_file *dwo_file) | |
3019eac3 DE |
8457 | { |
8458 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8459 | struct dwarf2_section_info *section = &dwo_file->sections.info; | |
8460 | bfd *abfd; | |
8461 | htab_t cu_htab; | |
d521ce57 | 8462 | const gdb_byte *info_ptr, *end_ptr; |
19c3d4c9 DE |
8463 | struct create_dwo_cu_data create_dwo_cu_data; |
8464 | struct dwo_unit *dwo_unit; | |
3019eac3 DE |
8465 | |
8466 | dwarf2_read_section (objfile, section); | |
8467 | info_ptr = section->buffer; | |
8468 | ||
8469 | if (info_ptr == NULL) | |
8470 | return NULL; | |
8471 | ||
8472 | /* We can't set abfd until now because the section may be empty or | |
8473 | not present, in which case section->asection will be NULL. */ | |
8474 | abfd = section->asection->owner; | |
8475 | ||
09406207 | 8476 | if (dwarf2_read_debug) |
19c3d4c9 DE |
8477 | { |
8478 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
8479 | bfd_section_name (abfd, section->asection), | |
8480 | bfd_get_filename (abfd)); | |
8481 | } | |
3019eac3 | 8482 | |
19c3d4c9 DE |
8483 | create_dwo_cu_data.dwo_file = dwo_file; |
8484 | dwo_unit = NULL; | |
3019eac3 DE |
8485 | |
8486 | end_ptr = info_ptr + section->size; | |
8487 | while (info_ptr < end_ptr) | |
8488 | { | |
8489 | struct dwarf2_per_cu_data per_cu; | |
8490 | ||
19c3d4c9 DE |
8491 | memset (&create_dwo_cu_data.dwo_unit, 0, |
8492 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 DE |
8493 | memset (&per_cu, 0, sizeof (per_cu)); |
8494 | per_cu.objfile = objfile; | |
8495 | per_cu.is_debug_types = 0; | |
8496 | per_cu.offset.sect_off = info_ptr - section->buffer; | |
8a0459fd | 8497 | per_cu.section = section; |
3019eac3 DE |
8498 | |
8499 | init_cutu_and_read_dies_no_follow (&per_cu, | |
8500 | &dwo_file->sections.abbrev, | |
8501 | dwo_file, | |
19c3d4c9 DE |
8502 | create_dwo_cu_reader, |
8503 | &create_dwo_cu_data); | |
8504 | ||
8505 | if (create_dwo_cu_data.dwo_unit.dwo_file != NULL) | |
8506 | { | |
8507 | /* If we've already found one, complain. We only support one | |
8508 | because having more than one requires hacking the dwo_name of | |
8509 | each to match, which is highly unlikely to happen. */ | |
8510 | if (dwo_unit != NULL) | |
8511 | { | |
8512 | complaint (&symfile_complaints, | |
8513 | _("Multiple CUs in DWO file %s [in module %s]"), | |
8514 | dwo_file->dwo_name, objfile->name); | |
8515 | break; | |
8516 | } | |
8517 | ||
8518 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8519 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
8520 | } | |
3019eac3 DE |
8521 | |
8522 | info_ptr += per_cu.length; | |
8523 | } | |
8524 | ||
19c3d4c9 | 8525 | return dwo_unit; |
3019eac3 DE |
8526 | } |
8527 | ||
80626a55 DE |
8528 | /* DWP file .debug_{cu,tu}_index section format: |
8529 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
8530 | ||
8531 | Both index sections have the same format, and serve to map a 64-bit | |
8532 | signature to a set of section numbers. Each section begins with a header, | |
8533 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
8534 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
8535 | aligned at 8-byte boundaries in the file. | |
8536 | ||
8537 | The index section header contains two unsigned 32-bit values (using the | |
8538 | byte order of the application binary): | |
8539 | ||
8540 | N, the number of compilation units or type units in the index | |
8541 | M, the number of slots in the hash table | |
8542 | ||
8543 | (We assume that N and M will not exceed 2^32 - 1.) | |
8544 | ||
8545 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
8546 | ||
8547 | The hash table begins at offset 8 in the section, and consists of an array | |
8548 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
8549 | order of the application binary). Unused slots in the hash table are 0. | |
8550 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
8551 | ||
8552 | The parallel table begins immediately after the hash table | |
8553 | (at offset 8 + 8 * M from the beginning of the section), and consists of an | |
8554 | array of 32-bit indexes (using the byte order of the application binary), | |
8555 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
8556 | table contains a 32-bit index into the pool of section numbers. For unused | |
8557 | hash table slots, the corresponding entry in the parallel table will be 0. | |
8558 | ||
8559 | Given a 64-bit compilation unit signature or a type signature S, an entry | |
8560 | in the hash table is located as follows: | |
8561 | ||
8562 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with | |
8563 | the low-order k bits all set to 1. | |
8564 | ||
8565 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). | |
8566 | ||
8567 | 3) If the hash table entry at index H matches the signature, use that | |
8568 | entry. If the hash table entry at index H is unused (all zeroes), | |
8569 | terminate the search: the signature is not present in the table. | |
8570 | ||
8571 | 4) Let H = (H + H') modulo M. Repeat at Step 3. | |
8572 | ||
8573 | Because M > N and H' and M are relatively prime, the search is guaranteed | |
8574 | to stop at an unused slot or find the match. | |
8575 | ||
8576 | The pool of section numbers begins immediately following the hash table | |
8577 | (at offset 8 + 12 * M from the beginning of the section). The pool of | |
8578 | section numbers consists of an array of 32-bit words (using the byte order | |
8579 | of the application binary). Each item in the array is indexed starting | |
8580 | from 0. The hash table entry provides the index of the first section | |
8581 | number in the set. Additional section numbers in the set follow, and the | |
8582 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
8583 | ||
8584 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
8585 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
8586 | be the second entry. Other members of the set may follow in any order. */ | |
8587 | ||
8588 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
8589 | .debug_{info,types}.dwo in DWP_FILE. | |
8590 | Returns NULL if there isn't one. | |
8591 | Note: This function processes DWP files only, not DWO files. */ | |
8592 | ||
8593 | static struct dwp_hash_table * | |
8594 | create_dwp_hash_table (struct dwp_file *dwp_file, int is_debug_types) | |
8595 | { | |
8596 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8597 | bfd *dbfd = dwp_file->dbfd; | |
948f8e3d | 8598 | const gdb_byte *index_ptr, *index_end; |
80626a55 DE |
8599 | struct dwarf2_section_info *index; |
8600 | uint32_t version, nr_units, nr_slots; | |
8601 | struct dwp_hash_table *htab; | |
8602 | ||
8603 | if (is_debug_types) | |
8604 | index = &dwp_file->sections.tu_index; | |
8605 | else | |
8606 | index = &dwp_file->sections.cu_index; | |
8607 | ||
8608 | if (dwarf2_section_empty_p (index)) | |
8609 | return NULL; | |
8610 | dwarf2_read_section (objfile, index); | |
8611 | ||
8612 | index_ptr = index->buffer; | |
8613 | index_end = index_ptr + index->size; | |
8614 | ||
8615 | version = read_4_bytes (dbfd, index_ptr); | |
8616 | index_ptr += 8; /* Skip the unused word. */ | |
8617 | nr_units = read_4_bytes (dbfd, index_ptr); | |
8618 | index_ptr += 4; | |
8619 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
8620 | index_ptr += 4; | |
8621 | ||
8622 | if (version != 1) | |
8623 | { | |
8624 | error (_("Dwarf Error: unsupported DWP file version (%u)" | |
8625 | " [in module %s]"), | |
8626 | version, dwp_file->name); | |
8627 | } | |
8628 | if (nr_slots != (nr_slots & -nr_slots)) | |
8629 | { | |
8630 | error (_("Dwarf Error: number of slots in DWP hash table (%u)" | |
8631 | " is not power of 2 [in module %s]"), | |
8632 | nr_slots, dwp_file->name); | |
8633 | } | |
8634 | ||
8635 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
8636 | htab->nr_units = nr_units; | |
8637 | htab->nr_slots = nr_slots; | |
8638 | htab->hash_table = index_ptr; | |
8639 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
8640 | htab->section_pool = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
8641 | ||
8642 | return htab; | |
8643 | } | |
8644 | ||
8645 | /* Update SECTIONS with the data from SECTP. | |
8646 | ||
8647 | This function is like the other "locate" section routines that are | |
8648 | passed to bfd_map_over_sections, but in this context the sections to | |
8649 | read comes from the DWP hash table, not the full ELF section table. | |
8650 | ||
8651 | The result is non-zero for success, or zero if an error was found. */ | |
8652 | ||
8653 | static int | |
8654 | locate_virtual_dwo_sections (asection *sectp, | |
8655 | struct virtual_dwo_sections *sections) | |
8656 | { | |
8657 | const struct dwop_section_names *names = &dwop_section_names; | |
8658 | ||
8659 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
8660 | { | |
8661 | /* There can be only one. */ | |
8662 | if (sections->abbrev.asection != NULL) | |
8663 | return 0; | |
8664 | sections->abbrev.asection = sectp; | |
8665 | sections->abbrev.size = bfd_get_section_size (sectp); | |
8666 | } | |
8667 | else if (section_is_p (sectp->name, &names->info_dwo) | |
8668 | || section_is_p (sectp->name, &names->types_dwo)) | |
8669 | { | |
8670 | /* There can be only one. */ | |
8671 | if (sections->info_or_types.asection != NULL) | |
8672 | return 0; | |
8673 | sections->info_or_types.asection = sectp; | |
8674 | sections->info_or_types.size = bfd_get_section_size (sectp); | |
8675 | } | |
8676 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
8677 | { | |
8678 | /* There can be only one. */ | |
8679 | if (sections->line.asection != NULL) | |
8680 | return 0; | |
8681 | sections->line.asection = sectp; | |
8682 | sections->line.size = bfd_get_section_size (sectp); | |
8683 | } | |
8684 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
8685 | { | |
8686 | /* There can be only one. */ | |
8687 | if (sections->loc.asection != NULL) | |
8688 | return 0; | |
8689 | sections->loc.asection = sectp; | |
8690 | sections->loc.size = bfd_get_section_size (sectp); | |
8691 | } | |
8692 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
8693 | { | |
8694 | /* There can be only one. */ | |
8695 | if (sections->macinfo.asection != NULL) | |
8696 | return 0; | |
8697 | sections->macinfo.asection = sectp; | |
8698 | sections->macinfo.size = bfd_get_section_size (sectp); | |
8699 | } | |
8700 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
8701 | { | |
8702 | /* There can be only one. */ | |
8703 | if (sections->macro.asection != NULL) | |
8704 | return 0; | |
8705 | sections->macro.asection = sectp; | |
8706 | sections->macro.size = bfd_get_section_size (sectp); | |
8707 | } | |
8708 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
8709 | { | |
8710 | /* There can be only one. */ | |
8711 | if (sections->str_offsets.asection != NULL) | |
8712 | return 0; | |
8713 | sections->str_offsets.asection = sectp; | |
8714 | sections->str_offsets.size = bfd_get_section_size (sectp); | |
8715 | } | |
8716 | else | |
8717 | { | |
8718 | /* No other kind of section is valid. */ | |
8719 | return 0; | |
8720 | } | |
8721 | ||
8722 | return 1; | |
8723 | } | |
8724 | ||
8725 | /* Create a dwo_unit object for the DWO with signature SIGNATURE. | |
8726 | HTAB is the hash table from the DWP file. | |
0ac5b59e DE |
8727 | SECTION_INDEX is the index of the DWO in HTAB. |
8728 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. */ | |
80626a55 DE |
8729 | |
8730 | static struct dwo_unit * | |
8731 | create_dwo_in_dwp (struct dwp_file *dwp_file, | |
8732 | const struct dwp_hash_table *htab, | |
8733 | uint32_t section_index, | |
0ac5b59e | 8734 | const char *comp_dir, |
80626a55 DE |
8735 | ULONGEST signature, int is_debug_types) |
8736 | { | |
8737 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8738 | bfd *dbfd = dwp_file->dbfd; | |
8739 | const char *kind = is_debug_types ? "TU" : "CU"; | |
8740 | struct dwo_file *dwo_file; | |
8741 | struct dwo_unit *dwo_unit; | |
8742 | struct virtual_dwo_sections sections; | |
8743 | void **dwo_file_slot; | |
8744 | char *virtual_dwo_name; | |
8745 | struct dwarf2_section_info *cutu; | |
8746 | struct cleanup *cleanups; | |
8747 | int i; | |
8748 | ||
8749 | if (dwarf2_read_debug) | |
8750 | { | |
4031ecc5 | 8751 | fprintf_unfiltered (gdb_stdlog, "Reading %s %u/%s in DWP file: %s\n", |
80626a55 | 8752 | kind, |
4031ecc5 | 8753 | section_index, hex_string (signature), |
80626a55 DE |
8754 | dwp_file->name); |
8755 | } | |
8756 | ||
8757 | /* Fetch the sections of this DWO. | |
8758 | Put a limit on the number of sections we look for so that bad data | |
8759 | doesn't cause us to loop forever. */ | |
8760 | ||
8761 | #define MAX_NR_DWO_SECTIONS \ | |
8762 | (1 /* .debug_info or .debug_types */ \ | |
8763 | + 1 /* .debug_abbrev */ \ | |
8764 | + 1 /* .debug_line */ \ | |
8765 | + 1 /* .debug_loc */ \ | |
8766 | + 1 /* .debug_str_offsets */ \ | |
8767 | + 1 /* .debug_macro */ \ | |
8768 | + 1 /* .debug_macinfo */ \ | |
8769 | + 1 /* trailing zero */) | |
8770 | ||
8771 | memset (§ions, 0, sizeof (sections)); | |
8772 | cleanups = make_cleanup (null_cleanup, 0); | |
8773 | ||
8774 | for (i = 0; i < MAX_NR_DWO_SECTIONS; ++i) | |
8775 | { | |
8776 | asection *sectp; | |
8777 | uint32_t section_nr = | |
8778 | read_4_bytes (dbfd, | |
8779 | htab->section_pool | |
8780 | + (section_index + i) * sizeof (uint32_t)); | |
8781 | ||
8782 | if (section_nr == 0) | |
8783 | break; | |
8784 | if (section_nr >= dwp_file->num_sections) | |
8785 | { | |
8786 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
8787 | " [in module %s]"), | |
8788 | dwp_file->name); | |
8789 | } | |
8790 | ||
8791 | sectp = dwp_file->elf_sections[section_nr]; | |
8792 | if (! locate_virtual_dwo_sections (sectp, §ions)) | |
8793 | { | |
8794 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
8795 | " [in module %s]"), | |
8796 | dwp_file->name); | |
8797 | } | |
8798 | } | |
8799 | ||
8800 | if (i < 2 | |
8801 | || sections.info_or_types.asection == NULL | |
8802 | || sections.abbrev.asection == NULL) | |
8803 | { | |
8804 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
8805 | " [in module %s]"), | |
8806 | dwp_file->name); | |
8807 | } | |
8808 | if (i == MAX_NR_DWO_SECTIONS) | |
8809 | { | |
8810 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
8811 | " [in module %s]"), | |
8812 | dwp_file->name); | |
8813 | } | |
8814 | ||
8815 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
8816 | have dwo_unit "live" in that. At least for now. | |
8817 | ||
8818 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec DE |
8819 | However, for each CU + set of TUs that came from the same original DWO |
8820 | file, we want to combine them back into a virtual DWO file to save space | |
80626a55 DE |
8821 | (fewer struct dwo_file objects to allocated). Remember that for really |
8822 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
8823 | ||
2792b94d PM |
8824 | virtual_dwo_name = |
8825 | xstrprintf ("virtual-dwo/%d-%d-%d-%d", | |
8826 | sections.abbrev.asection ? sections.abbrev.asection->id : 0, | |
8827 | sections.line.asection ? sections.line.asection->id : 0, | |
8828 | sections.loc.asection ? sections.loc.asection->id : 0, | |
8829 | (sections.str_offsets.asection | |
8830 | ? sections.str_offsets.asection->id | |
8831 | : 0)); | |
80626a55 DE |
8832 | make_cleanup (xfree, virtual_dwo_name); |
8833 | /* Can we use an existing virtual DWO file? */ | |
0ac5b59e | 8834 | dwo_file_slot = lookup_dwo_file_slot (virtual_dwo_name, comp_dir); |
80626a55 DE |
8835 | /* Create one if necessary. */ |
8836 | if (*dwo_file_slot == NULL) | |
8837 | { | |
8838 | if (dwarf2_read_debug) | |
8839 | { | |
8840 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
8841 | virtual_dwo_name); | |
8842 | } | |
8843 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
8844 | dwo_file->dwo_name = obstack_copy0 (&objfile->objfile_obstack, |
8845 | virtual_dwo_name, | |
8846 | strlen (virtual_dwo_name)); | |
8847 | dwo_file->comp_dir = comp_dir; | |
80626a55 DE |
8848 | dwo_file->sections.abbrev = sections.abbrev; |
8849 | dwo_file->sections.line = sections.line; | |
8850 | dwo_file->sections.loc = sections.loc; | |
8851 | dwo_file->sections.macinfo = sections.macinfo; | |
8852 | dwo_file->sections.macro = sections.macro; | |
8853 | dwo_file->sections.str_offsets = sections.str_offsets; | |
8854 | /* The "str" section is global to the entire DWP file. */ | |
8855 | dwo_file->sections.str = dwp_file->sections.str; | |
8856 | /* The info or types section is assigned later to dwo_unit, | |
8857 | there's no need to record it in dwo_file. | |
8858 | Also, we can't simply record type sections in dwo_file because | |
8859 | we record a pointer into the vector in dwo_unit. As we collect more | |
8860 | types we'll grow the vector and eventually have to reallocate space | |
8861 | for it, invalidating all the pointers into the current copy. */ | |
8862 | *dwo_file_slot = dwo_file; | |
8863 | } | |
8864 | else | |
8865 | { | |
8866 | if (dwarf2_read_debug) | |
8867 | { | |
8868 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
8869 | virtual_dwo_name); | |
8870 | } | |
8871 | dwo_file = *dwo_file_slot; | |
8872 | } | |
8873 | do_cleanups (cleanups); | |
8874 | ||
8875 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
8876 | dwo_unit->dwo_file = dwo_file; | |
8877 | dwo_unit->signature = signature; | |
8a0459fd DE |
8878 | dwo_unit->section = obstack_alloc (&objfile->objfile_obstack, |
8879 | sizeof (struct dwarf2_section_info)); | |
8880 | *dwo_unit->section = sections.info_or_types; | |
80626a55 DE |
8881 | /* offset, length, type_offset_in_tu are set later. */ |
8882 | ||
8883 | return dwo_unit; | |
8884 | } | |
8885 | ||
8886 | /* Lookup the DWO with SIGNATURE in DWP_FILE. */ | |
8887 | ||
8888 | static struct dwo_unit * | |
8889 | lookup_dwo_in_dwp (struct dwp_file *dwp_file, | |
8890 | const struct dwp_hash_table *htab, | |
0ac5b59e | 8891 | const char *comp_dir, |
80626a55 DE |
8892 | ULONGEST signature, int is_debug_types) |
8893 | { | |
8894 | bfd *dbfd = dwp_file->dbfd; | |
8895 | uint32_t mask = htab->nr_slots - 1; | |
8896 | uint32_t hash = signature & mask; | |
8897 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
8898 | unsigned int i; | |
8899 | void **slot; | |
8900 | struct dwo_unit find_dwo_cu, *dwo_cu; | |
8901 | ||
8902 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
8903 | find_dwo_cu.signature = signature; | |
8904 | slot = htab_find_slot (dwp_file->loaded_cutus, &find_dwo_cu, INSERT); | |
8905 | ||
8906 | if (*slot != NULL) | |
8907 | return *slot; | |
8908 | ||
8909 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
8910 | for (i = 0; i < htab->nr_slots; ++i) | |
8911 | { | |
8912 | ULONGEST signature_in_table; | |
8913 | ||
8914 | signature_in_table = | |
8915 | read_8_bytes (dbfd, htab->hash_table + hash * sizeof (uint64_t)); | |
8916 | if (signature_in_table == signature) | |
8917 | { | |
8918 | uint32_t section_index = | |
8919 | read_4_bytes (dbfd, htab->unit_table + hash * sizeof (uint32_t)); | |
8920 | ||
8921 | *slot = create_dwo_in_dwp (dwp_file, htab, section_index, | |
0ac5b59e | 8922 | comp_dir, signature, is_debug_types); |
80626a55 DE |
8923 | return *slot; |
8924 | } | |
8925 | if (signature_in_table == 0) | |
8926 | return NULL; | |
8927 | hash = (hash + hash2) & mask; | |
8928 | } | |
8929 | ||
8930 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
8931 | " [in module %s]"), | |
8932 | dwp_file->name); | |
8933 | } | |
8934 | ||
ab5088bf | 8935 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
8936 | Open the file specified by FILE_NAME and hand it off to BFD for |
8937 | preliminary analysis. Return a newly initialized bfd *, which | |
8938 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 8939 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
3019eac3 DE |
8940 | In case of trouble, return NULL. |
8941 | NOTE: This function is derived from symfile_bfd_open. */ | |
8942 | ||
8943 | static bfd * | |
80626a55 | 8944 | try_open_dwop_file (const char *file_name, int is_dwp) |
3019eac3 DE |
8945 | { |
8946 | bfd *sym_bfd; | |
80626a55 | 8947 | int desc, flags; |
3019eac3 | 8948 | char *absolute_name; |
3019eac3 | 8949 | |
80626a55 DE |
8950 | flags = OPF_TRY_CWD_FIRST; |
8951 | if (is_dwp) | |
8952 | flags |= OPF_SEARCH_IN_PATH; | |
8953 | desc = openp (debug_file_directory, flags, file_name, | |
3019eac3 DE |
8954 | O_RDONLY | O_BINARY, &absolute_name); |
8955 | if (desc < 0) | |
8956 | return NULL; | |
8957 | ||
bb397797 | 8958 | sym_bfd = gdb_bfd_open (absolute_name, gnutarget, desc); |
3019eac3 DE |
8959 | if (!sym_bfd) |
8960 | { | |
3019eac3 DE |
8961 | xfree (absolute_name); |
8962 | return NULL; | |
8963 | } | |
a4453b7e | 8964 | xfree (absolute_name); |
3019eac3 DE |
8965 | bfd_set_cacheable (sym_bfd, 1); |
8966 | ||
8967 | if (!bfd_check_format (sym_bfd, bfd_object)) | |
8968 | { | |
cbb099e8 | 8969 | gdb_bfd_unref (sym_bfd); /* This also closes desc. */ |
3019eac3 DE |
8970 | return NULL; |
8971 | } | |
8972 | ||
3019eac3 DE |
8973 | return sym_bfd; |
8974 | } | |
8975 | ||
ab5088bf | 8976 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
8977 | COMP_DIR is the DW_AT_comp_dir attribute. |
8978 | The result is the bfd handle of the file. | |
8979 | If there is a problem finding or opening the file, return NULL. | |
8980 | Upon success, the canonicalized path of the file is stored in the bfd, | |
8981 | same as symfile_bfd_open. */ | |
8982 | ||
8983 | static bfd * | |
ab5088bf | 8984 | open_dwo_file (const char *file_name, const char *comp_dir) |
3019eac3 DE |
8985 | { |
8986 | bfd *abfd; | |
3019eac3 | 8987 | |
80626a55 | 8988 | if (IS_ABSOLUTE_PATH (file_name)) |
ab5088bf | 8989 | return try_open_dwop_file (file_name, 0 /*is_dwp*/); |
3019eac3 DE |
8990 | |
8991 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
8992 | ||
8993 | if (comp_dir != NULL) | |
8994 | { | |
80626a55 | 8995 | char *path_to_try = concat (comp_dir, SLASH_STRING, file_name, NULL); |
3019eac3 DE |
8996 | |
8997 | /* NOTE: If comp_dir is a relative path, this will also try the | |
8998 | search path, which seems useful. */ | |
ab5088bf | 8999 | abfd = try_open_dwop_file (path_to_try, 0 /*is_dwp*/); |
3019eac3 DE |
9000 | xfree (path_to_try); |
9001 | if (abfd != NULL) | |
9002 | return abfd; | |
9003 | } | |
9004 | ||
9005 | /* That didn't work, try debug-file-directory, which, despite its name, | |
9006 | is a list of paths. */ | |
9007 | ||
9008 | if (*debug_file_directory == '\0') | |
9009 | return NULL; | |
9010 | ||
ab5088bf | 9011 | return try_open_dwop_file (file_name, 0 /*is_dwp*/); |
3019eac3 DE |
9012 | } |
9013 | ||
80626a55 DE |
9014 | /* This function is mapped across the sections and remembers the offset and |
9015 | size of each of the DWO debugging sections we are interested in. */ | |
9016 | ||
9017 | static void | |
9018 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
9019 | { | |
9020 | struct dwo_sections *dwo_sections = dwo_sections_ptr; | |
9021 | const struct dwop_section_names *names = &dwop_section_names; | |
9022 | ||
9023 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
9024 | { | |
9025 | dwo_sections->abbrev.asection = sectp; | |
9026 | dwo_sections->abbrev.size = bfd_get_section_size (sectp); | |
9027 | } | |
9028 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
9029 | { | |
9030 | dwo_sections->info.asection = sectp; | |
9031 | dwo_sections->info.size = bfd_get_section_size (sectp); | |
9032 | } | |
9033 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
9034 | { | |
9035 | dwo_sections->line.asection = sectp; | |
9036 | dwo_sections->line.size = bfd_get_section_size (sectp); | |
9037 | } | |
9038 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
9039 | { | |
9040 | dwo_sections->loc.asection = sectp; | |
9041 | dwo_sections->loc.size = bfd_get_section_size (sectp); | |
9042 | } | |
9043 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
9044 | { | |
9045 | dwo_sections->macinfo.asection = sectp; | |
9046 | dwo_sections->macinfo.size = bfd_get_section_size (sectp); | |
9047 | } | |
9048 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
9049 | { | |
9050 | dwo_sections->macro.asection = sectp; | |
9051 | dwo_sections->macro.size = bfd_get_section_size (sectp); | |
9052 | } | |
9053 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
9054 | { | |
9055 | dwo_sections->str.asection = sectp; | |
9056 | dwo_sections->str.size = bfd_get_section_size (sectp); | |
9057 | } | |
9058 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
9059 | { | |
9060 | dwo_sections->str_offsets.asection = sectp; | |
9061 | dwo_sections->str_offsets.size = bfd_get_section_size (sectp); | |
9062 | } | |
9063 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
9064 | { | |
9065 | struct dwarf2_section_info type_section; | |
9066 | ||
9067 | memset (&type_section, 0, sizeof (type_section)); | |
9068 | type_section.asection = sectp; | |
9069 | type_section.size = bfd_get_section_size (sectp); | |
9070 | VEC_safe_push (dwarf2_section_info_def, dwo_sections->types, | |
9071 | &type_section); | |
9072 | } | |
9073 | } | |
9074 | ||
ab5088bf | 9075 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 9076 | by PER_CU. This is for the non-DWP case. |
80626a55 | 9077 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
9078 | |
9079 | static struct dwo_file * | |
0ac5b59e DE |
9080 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
9081 | const char *dwo_name, const char *comp_dir) | |
3019eac3 DE |
9082 | { |
9083 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9084 | struct dwo_file *dwo_file; |
9085 | bfd *dbfd; | |
3019eac3 DE |
9086 | struct cleanup *cleanups; |
9087 | ||
ab5088bf | 9088 | dbfd = open_dwo_file (dwo_name, comp_dir); |
80626a55 DE |
9089 | if (dbfd == NULL) |
9090 | { | |
9091 | if (dwarf2_read_debug) | |
9092 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); | |
9093 | return NULL; | |
9094 | } | |
9095 | dwo_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_file); | |
0ac5b59e DE |
9096 | dwo_file->dwo_name = dwo_name; |
9097 | dwo_file->comp_dir = comp_dir; | |
80626a55 | 9098 | dwo_file->dbfd = dbfd; |
3019eac3 DE |
9099 | |
9100 | cleanups = make_cleanup (free_dwo_file_cleanup, dwo_file); | |
9101 | ||
80626a55 | 9102 | bfd_map_over_sections (dbfd, dwarf2_locate_dwo_sections, &dwo_file->sections); |
3019eac3 | 9103 | |
19c3d4c9 | 9104 | dwo_file->cu = create_dwo_cu (dwo_file); |
3019eac3 DE |
9105 | |
9106 | dwo_file->tus = create_debug_types_hash_table (dwo_file, | |
9107 | dwo_file->sections.types); | |
9108 | ||
9109 | discard_cleanups (cleanups); | |
9110 | ||
80626a55 DE |
9111 | if (dwarf2_read_debug) |
9112 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); | |
9113 | ||
3019eac3 DE |
9114 | return dwo_file; |
9115 | } | |
9116 | ||
80626a55 DE |
9117 | /* This function is mapped across the sections and remembers the offset and |
9118 | size of each of the DWP debugging sections we are interested in. */ | |
3019eac3 | 9119 | |
80626a55 DE |
9120 | static void |
9121 | dwarf2_locate_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
3019eac3 | 9122 | { |
80626a55 DE |
9123 | struct dwp_file *dwp_file = dwp_file_ptr; |
9124 | const struct dwop_section_names *names = &dwop_section_names; | |
9125 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 9126 | |
80626a55 DE |
9127 | /* Record the ELF section number for later lookup: this is what the |
9128 | .debug_cu_index,.debug_tu_index tables use. */ | |
9129 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
9130 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 9131 | |
80626a55 DE |
9132 | /* Look for specific sections that we need. */ |
9133 | if (section_is_p (sectp->name, &names->str_dwo)) | |
9134 | { | |
9135 | dwp_file->sections.str.asection = sectp; | |
9136 | dwp_file->sections.str.size = bfd_get_section_size (sectp); | |
9137 | } | |
9138 | else if (section_is_p (sectp->name, &names->cu_index)) | |
9139 | { | |
9140 | dwp_file->sections.cu_index.asection = sectp; | |
9141 | dwp_file->sections.cu_index.size = bfd_get_section_size (sectp); | |
9142 | } | |
9143 | else if (section_is_p (sectp->name, &names->tu_index)) | |
9144 | { | |
9145 | dwp_file->sections.tu_index.asection = sectp; | |
9146 | dwp_file->sections.tu_index.size = bfd_get_section_size (sectp); | |
9147 | } | |
9148 | } | |
3019eac3 | 9149 | |
80626a55 | 9150 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9151 | |
80626a55 DE |
9152 | static hashval_t |
9153 | hash_dwp_loaded_cutus (const void *item) | |
9154 | { | |
9155 | const struct dwo_unit *dwo_unit = item; | |
3019eac3 | 9156 | |
80626a55 DE |
9157 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
9158 | return dwo_unit->signature; | |
3019eac3 DE |
9159 | } |
9160 | ||
80626a55 | 9161 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9162 | |
80626a55 DE |
9163 | static int |
9164 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 9165 | { |
80626a55 DE |
9166 | const struct dwo_unit *dua = a; |
9167 | const struct dwo_unit *dub = b; | |
3019eac3 | 9168 | |
80626a55 DE |
9169 | return dua->signature == dub->signature; |
9170 | } | |
3019eac3 | 9171 | |
80626a55 | 9172 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 9173 | |
80626a55 DE |
9174 | static htab_t |
9175 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
9176 | { | |
9177 | return htab_create_alloc_ex (3, | |
9178 | hash_dwp_loaded_cutus, | |
9179 | eq_dwp_loaded_cutus, | |
9180 | NULL, | |
9181 | &objfile->objfile_obstack, | |
9182 | hashtab_obstack_allocate, | |
9183 | dummy_obstack_deallocate); | |
9184 | } | |
3019eac3 | 9185 | |
ab5088bf DE |
9186 | /* Try to open DWP file FILE_NAME. |
9187 | The result is the bfd handle of the file. | |
9188 | If there is a problem finding or opening the file, return NULL. | |
9189 | Upon success, the canonicalized path of the file is stored in the bfd, | |
9190 | same as symfile_bfd_open. */ | |
9191 | ||
9192 | static bfd * | |
9193 | open_dwp_file (const char *file_name) | |
9194 | { | |
9195 | return try_open_dwop_file (file_name, 1 /*is_dwp*/); | |
9196 | } | |
9197 | ||
80626a55 DE |
9198 | /* Initialize the use of the DWP file for the current objfile. |
9199 | By convention the name of the DWP file is ${objfile}.dwp. | |
9200 | The result is NULL if it can't be found. */ | |
a766d390 | 9201 | |
80626a55 | 9202 | static struct dwp_file * |
ab5088bf | 9203 | open_and_init_dwp_file (void) |
80626a55 DE |
9204 | { |
9205 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
9206 | struct dwp_file *dwp_file; | |
9207 | char *dwp_name; | |
9208 | bfd *dbfd; | |
9209 | struct cleanup *cleanups; | |
9210 | ||
2792b94d | 9211 | dwp_name = xstrprintf ("%s.dwp", dwarf2_per_objfile->objfile->name); |
80626a55 DE |
9212 | cleanups = make_cleanup (xfree, dwp_name); |
9213 | ||
ab5088bf | 9214 | dbfd = open_dwp_file (dwp_name); |
80626a55 DE |
9215 | if (dbfd == NULL) |
9216 | { | |
9217 | if (dwarf2_read_debug) | |
9218 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name); | |
9219 | do_cleanups (cleanups); | |
9220 | return NULL; | |
3019eac3 | 9221 | } |
80626a55 DE |
9222 | dwp_file = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_file); |
9223 | dwp_file->name = obstack_copy0 (&objfile->objfile_obstack, | |
9224 | dwp_name, strlen (dwp_name)); | |
9225 | dwp_file->dbfd = dbfd; | |
9226 | do_cleanups (cleanups); | |
c906108c | 9227 | |
80626a55 DE |
9228 | /* +1: section 0 is unused */ |
9229 | dwp_file->num_sections = bfd_count_sections (dbfd) + 1; | |
9230 | dwp_file->elf_sections = | |
9231 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
9232 | dwp_file->num_sections, asection *); | |
9233 | ||
9234 | bfd_map_over_sections (dbfd, dwarf2_locate_dwp_sections, dwp_file); | |
9235 | ||
9236 | dwp_file->cus = create_dwp_hash_table (dwp_file, 0); | |
9237 | ||
9238 | dwp_file->tus = create_dwp_hash_table (dwp_file, 1); | |
9239 | ||
9240 | dwp_file->loaded_cutus = allocate_dwp_loaded_cutus_table (objfile); | |
9241 | ||
80626a55 DE |
9242 | if (dwarf2_read_debug) |
9243 | { | |
9244 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
9245 | fprintf_unfiltered (gdb_stdlog, | |
9246 | " %u CUs, %u TUs\n", | |
9247 | dwp_file->cus ? dwp_file->cus->nr_units : 0, | |
9248 | dwp_file->tus ? dwp_file->tus->nr_units : 0); | |
9249 | } | |
9250 | ||
9251 | return dwp_file; | |
3019eac3 | 9252 | } |
c906108c | 9253 | |
ab5088bf DE |
9254 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
9255 | ||
9256 | static struct dwp_file * | |
9257 | get_dwp_file (void) | |
9258 | { | |
9259 | if (! dwarf2_per_objfile->dwp_checked) | |
9260 | { | |
9261 | dwarf2_per_objfile->dwp_file = open_and_init_dwp_file (); | |
9262 | dwarf2_per_objfile->dwp_checked = 1; | |
9263 | } | |
9264 | return dwarf2_per_objfile->dwp_file; | |
9265 | } | |
9266 | ||
80626a55 DE |
9267 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
9268 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
9269 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 9270 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
9271 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
9272 | ||
9273 | This is called, for example, when wanting to read a variable with a | |
9274 | complex location. Therefore we don't want to do file i/o for every call. | |
9275 | Therefore we don't want to look for a DWO file on every call. | |
9276 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
9277 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
9278 | for a DWO file. | |
9279 | ||
1c658ad5 | 9280 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 9281 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 9282 | |
3019eac3 | 9283 | static struct dwo_unit * |
80626a55 DE |
9284 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
9285 | const char *dwo_name, const char *comp_dir, | |
9286 | ULONGEST signature, int is_debug_types) | |
3019eac3 DE |
9287 | { |
9288 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 DE |
9289 | const char *kind = is_debug_types ? "TU" : "CU"; |
9290 | void **dwo_file_slot; | |
3019eac3 | 9291 | struct dwo_file *dwo_file; |
80626a55 | 9292 | struct dwp_file *dwp_file; |
cb1df416 | 9293 | |
80626a55 | 9294 | /* Have we already read SIGNATURE from a DWP file? */ |
cf2c3c16 | 9295 | |
ab5088bf | 9296 | dwp_file = get_dwp_file (); |
80626a55 | 9297 | if (dwp_file != NULL) |
cf2c3c16 | 9298 | { |
80626a55 DE |
9299 | const struct dwp_hash_table *dwp_htab = |
9300 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
9301 | ||
9302 | if (dwp_htab != NULL) | |
9303 | { | |
9304 | struct dwo_unit *dwo_cutu = | |
0ac5b59e DE |
9305 | lookup_dwo_in_dwp (dwp_file, dwp_htab, comp_dir, |
9306 | signature, is_debug_types); | |
80626a55 DE |
9307 | |
9308 | if (dwo_cutu != NULL) | |
9309 | { | |
9310 | if (dwarf2_read_debug) | |
9311 | { | |
9312 | fprintf_unfiltered (gdb_stdlog, | |
9313 | "Virtual DWO %s %s found: @%s\n", | |
9314 | kind, hex_string (signature), | |
9315 | host_address_to_string (dwo_cutu)); | |
9316 | } | |
9317 | return dwo_cutu; | |
9318 | } | |
9319 | } | |
9320 | } | |
9321 | ||
9322 | /* Have we already seen DWO_NAME? */ | |
9323 | ||
0ac5b59e | 9324 | dwo_file_slot = lookup_dwo_file_slot (dwo_name, comp_dir); |
80626a55 DE |
9325 | if (*dwo_file_slot == NULL) |
9326 | { | |
9327 | /* Read in the file and build a table of the DWOs it contains. */ | |
0ac5b59e | 9328 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); |
80626a55 DE |
9329 | } |
9330 | /* NOTE: This will be NULL if unable to open the file. */ | |
9331 | dwo_file = *dwo_file_slot; | |
9332 | ||
9333 | if (dwo_file != NULL) | |
9334 | { | |
19c3d4c9 | 9335 | struct dwo_unit *dwo_cutu = NULL; |
80626a55 | 9336 | |
19c3d4c9 | 9337 | if (is_debug_types && dwo_file->tus) |
80626a55 | 9338 | { |
19c3d4c9 | 9339 | struct dwo_unit find_dwo_cutu; |
9a619af0 | 9340 | |
80626a55 DE |
9341 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); |
9342 | find_dwo_cutu.signature = signature; | |
19c3d4c9 DE |
9343 | dwo_cutu = htab_find (dwo_file->tus, &find_dwo_cutu); |
9344 | } | |
9345 | else if (!is_debug_types && dwo_file->cu) | |
9346 | { | |
9347 | if (signature == dwo_file->cu->signature) | |
9348 | dwo_cutu = dwo_file->cu; | |
9349 | } | |
3019eac3 | 9350 | |
19c3d4c9 DE |
9351 | if (dwo_cutu != NULL) |
9352 | { | |
9353 | if (dwarf2_read_debug) | |
80626a55 | 9354 | { |
19c3d4c9 DE |
9355 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", |
9356 | kind, dwo_name, hex_string (signature), | |
9357 | host_address_to_string (dwo_cutu)); | |
80626a55 | 9358 | } |
19c3d4c9 | 9359 | return dwo_cutu; |
80626a55 | 9360 | } |
2e276125 | 9361 | } |
9cdd5dbd | 9362 | |
80626a55 DE |
9363 | /* We didn't find it. This could mean a dwo_id mismatch, or |
9364 | someone deleted the DWO/DWP file, or the search path isn't set up | |
9365 | correctly to find the file. */ | |
9366 | ||
9367 | if (dwarf2_read_debug) | |
9368 | { | |
9369 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
9370 | kind, dwo_name, hex_string (signature)); | |
9371 | } | |
3019eac3 DE |
9372 | |
9373 | complaint (&symfile_complaints, | |
6296d8c1 | 9374 | _("Could not find DWO %s referenced by CU at offset 0x%x" |
3019eac3 | 9375 | " [in module %s]"), |
6296d8c1 | 9376 | kind, this_unit->offset.sect_off, objfile->name); |
3019eac3 | 9377 | return NULL; |
5fb290d7 DJ |
9378 | } |
9379 | ||
80626a55 DE |
9380 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
9381 | See lookup_dwo_cutu_unit for details. */ | |
9382 | ||
9383 | static struct dwo_unit * | |
9384 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
9385 | const char *dwo_name, const char *comp_dir, | |
9386 | ULONGEST signature) | |
9387 | { | |
9388 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
9389 | } | |
9390 | ||
9391 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
9392 | See lookup_dwo_cutu_unit for details. */ | |
9393 | ||
9394 | static struct dwo_unit * | |
9395 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
9396 | const char *dwo_name, const char *comp_dir) | |
9397 | { | |
9398 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
9399 | } | |
9400 | ||
3019eac3 DE |
9401 | /* Free all resources associated with DWO_FILE. |
9402 | Close the DWO file and munmap the sections. | |
9403 | All memory should be on the objfile obstack. */ | |
348e048f DE |
9404 | |
9405 | static void | |
3019eac3 | 9406 | free_dwo_file (struct dwo_file *dwo_file, struct objfile *objfile) |
348e048f | 9407 | { |
3019eac3 DE |
9408 | int ix; |
9409 | struct dwarf2_section_info *section; | |
348e048f | 9410 | |
5c6fa7ab | 9411 | /* Note: dbfd is NULL for virtual DWO files. */ |
80626a55 | 9412 | gdb_bfd_unref (dwo_file->dbfd); |
348e048f | 9413 | |
3019eac3 DE |
9414 | VEC_free (dwarf2_section_info_def, dwo_file->sections.types); |
9415 | } | |
348e048f | 9416 | |
3019eac3 | 9417 | /* Wrapper for free_dwo_file for use in cleanups. */ |
348e048f | 9418 | |
3019eac3 DE |
9419 | static void |
9420 | free_dwo_file_cleanup (void *arg) | |
9421 | { | |
9422 | struct dwo_file *dwo_file = (struct dwo_file *) arg; | |
9423 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
348e048f | 9424 | |
3019eac3 DE |
9425 | free_dwo_file (dwo_file, objfile); |
9426 | } | |
348e048f | 9427 | |
3019eac3 | 9428 | /* Traversal function for free_dwo_files. */ |
2ab95328 | 9429 | |
3019eac3 DE |
9430 | static int |
9431 | free_dwo_file_from_slot (void **slot, void *info) | |
9432 | { | |
9433 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
9434 | struct objfile *objfile = (struct objfile *) info; | |
348e048f | 9435 | |
3019eac3 | 9436 | free_dwo_file (dwo_file, objfile); |
348e048f | 9437 | |
3019eac3 DE |
9438 | return 1; |
9439 | } | |
348e048f | 9440 | |
3019eac3 | 9441 | /* Free all resources associated with DWO_FILES. */ |
348e048f | 9442 | |
3019eac3 DE |
9443 | static void |
9444 | free_dwo_files (htab_t dwo_files, struct objfile *objfile) | |
9445 | { | |
9446 | htab_traverse_noresize (dwo_files, free_dwo_file_from_slot, objfile); | |
348e048f | 9447 | } |
3019eac3 DE |
9448 | \f |
9449 | /* Read in various DIEs. */ | |
348e048f | 9450 | |
d389af10 JK |
9451 | /* qsort helper for inherit_abstract_dies. */ |
9452 | ||
9453 | static int | |
9454 | unsigned_int_compar (const void *ap, const void *bp) | |
9455 | { | |
9456 | unsigned int a = *(unsigned int *) ap; | |
9457 | unsigned int b = *(unsigned int *) bp; | |
9458 | ||
9459 | return (a > b) - (b > a); | |
9460 | } | |
9461 | ||
9462 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). | |
3e43a32a MS |
9463 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
9464 | already referenced by DW_AT_abstract_origin from the children of the | |
9465 | current DIE. */ | |
d389af10 JK |
9466 | |
9467 | static void | |
9468 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
9469 | { | |
9470 | struct die_info *child_die; | |
9471 | unsigned die_children_count; | |
9472 | /* CU offsets which were referenced by children of the current DIE. */ | |
b64f50a1 JK |
9473 | sect_offset *offsets; |
9474 | sect_offset *offsets_end, *offsetp; | |
d389af10 JK |
9475 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
9476 | struct die_info *origin_die; | |
9477 | /* Iterator of the ORIGIN_DIE children. */ | |
9478 | struct die_info *origin_child_die; | |
9479 | struct cleanup *cleanups; | |
9480 | struct attribute *attr; | |
cd02d79d PA |
9481 | struct dwarf2_cu *origin_cu; |
9482 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
9483 | |
9484 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9485 | if (!attr) | |
9486 | return; | |
9487 | ||
cd02d79d PA |
9488 | /* Note that following die references may follow to a die in a |
9489 | different cu. */ | |
9490 | ||
9491 | origin_cu = cu; | |
9492 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
9493 | ||
9494 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
9495 | symbols in. */ | |
9496 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
9497 | origin_cu->list_in_scope = cu->list_in_scope; | |
9498 | ||
edb3359d DJ |
9499 | if (die->tag != origin_die->tag |
9500 | && !(die->tag == DW_TAG_inlined_subroutine | |
9501 | && origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9502 | complaint (&symfile_complaints, |
9503 | _("DIE 0x%x and its abstract origin 0x%x have different tags"), | |
b64f50a1 | 9504 | die->offset.sect_off, origin_die->offset.sect_off); |
d389af10 JK |
9505 | |
9506 | child_die = die->child; | |
9507 | die_children_count = 0; | |
9508 | while (child_die && child_die->tag) | |
9509 | { | |
9510 | child_die = sibling_die (child_die); | |
9511 | die_children_count++; | |
9512 | } | |
9513 | offsets = xmalloc (sizeof (*offsets) * die_children_count); | |
9514 | cleanups = make_cleanup (xfree, offsets); | |
9515 | ||
9516 | offsets_end = offsets; | |
9517 | child_die = die->child; | |
9518 | while (child_die && child_die->tag) | |
9519 | { | |
c38f313d DJ |
9520 | /* For each CHILD_DIE, find the corresponding child of |
9521 | ORIGIN_DIE. If there is more than one layer of | |
9522 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
9523 | but GCC versions at least through 4.4 generate this (GCC PR | |
9524 | 40573). */ | |
9525 | struct die_info *child_origin_die = child_die; | |
cd02d79d | 9526 | struct dwarf2_cu *child_origin_cu = cu; |
9a619af0 | 9527 | |
c38f313d DJ |
9528 | while (1) |
9529 | { | |
cd02d79d PA |
9530 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
9531 | child_origin_cu); | |
c38f313d DJ |
9532 | if (attr == NULL) |
9533 | break; | |
cd02d79d PA |
9534 | child_origin_die = follow_die_ref (child_origin_die, attr, |
9535 | &child_origin_cu); | |
c38f313d DJ |
9536 | } |
9537 | ||
d389af10 JK |
9538 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
9539 | counterpart may exist. */ | |
c38f313d | 9540 | if (child_origin_die != child_die) |
d389af10 | 9541 | { |
edb3359d DJ |
9542 | if (child_die->tag != child_origin_die->tag |
9543 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
9544 | && child_origin_die->tag == DW_TAG_subprogram)) | |
d389af10 JK |
9545 | complaint (&symfile_complaints, |
9546 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9547 | "different tags"), child_die->offset.sect_off, |
9548 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9549 | if (child_origin_die->parent != origin_die) |
9550 | complaint (&symfile_complaints, | |
9551 | _("Child DIE 0x%x and its abstract origin 0x%x have " | |
b64f50a1 JK |
9552 | "different parents"), child_die->offset.sect_off, |
9553 | child_origin_die->offset.sect_off); | |
c38f313d DJ |
9554 | else |
9555 | *offsets_end++ = child_origin_die->offset; | |
d389af10 JK |
9556 | } |
9557 | child_die = sibling_die (child_die); | |
9558 | } | |
9559 | qsort (offsets, offsets_end - offsets, sizeof (*offsets), | |
9560 | unsigned_int_compar); | |
9561 | for (offsetp = offsets + 1; offsetp < offsets_end; offsetp++) | |
b64f50a1 | 9562 | if (offsetp[-1].sect_off == offsetp->sect_off) |
3e43a32a MS |
9563 | complaint (&symfile_complaints, |
9564 | _("Multiple children of DIE 0x%x refer " | |
9565 | "to DIE 0x%x as their abstract origin"), | |
b64f50a1 | 9566 | die->offset.sect_off, offsetp->sect_off); |
d389af10 JK |
9567 | |
9568 | offsetp = offsets; | |
9569 | origin_child_die = origin_die->child; | |
9570 | while (origin_child_die && origin_child_die->tag) | |
9571 | { | |
9572 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 JK |
9573 | while (offsetp < offsets_end |
9574 | && offsetp->sect_off < origin_child_die->offset.sect_off) | |
d389af10 | 9575 | offsetp++; |
b64f50a1 JK |
9576 | if (offsetp >= offsets_end |
9577 | || offsetp->sect_off > origin_child_die->offset.sect_off) | |
d389af10 JK |
9578 | { |
9579 | /* Found that ORIGIN_CHILD_DIE is really not referenced. */ | |
cd02d79d | 9580 | process_die (origin_child_die, origin_cu); |
d389af10 JK |
9581 | } |
9582 | origin_child_die = sibling_die (origin_child_die); | |
9583 | } | |
cd02d79d | 9584 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
d389af10 JK |
9585 | |
9586 | do_cleanups (cleanups); | |
9587 | } | |
9588 | ||
c906108c | 9589 | static void |
e7c27a73 | 9590 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9591 | { |
e7c27a73 | 9592 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9593 | struct context_stack *new; |
c906108c SS |
9594 | CORE_ADDR lowpc; |
9595 | CORE_ADDR highpc; | |
9596 | struct die_info *child_die; | |
edb3359d | 9597 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 9598 | const char *name; |
e142c38c | 9599 | CORE_ADDR baseaddr; |
801e3a5b | 9600 | struct block *block; |
edb3359d | 9601 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
34eaf542 TT |
9602 | VEC (symbolp) *template_args = NULL; |
9603 | struct template_symbol *templ_func = NULL; | |
edb3359d DJ |
9604 | |
9605 | if (inlined_func) | |
9606 | { | |
9607 | /* If we do not have call site information, we can't show the | |
9608 | caller of this inlined function. That's too confusing, so | |
9609 | only use the scope for local variables. */ | |
9610 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
9611 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
9612 | if (call_line == NULL || call_file == NULL) | |
9613 | { | |
9614 | read_lexical_block_scope (die, cu); | |
9615 | return; | |
9616 | } | |
9617 | } | |
c906108c | 9618 | |
e142c38c DJ |
9619 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
9620 | ||
94af9270 | 9621 | name = dwarf2_name (die, cu); |
c906108c | 9622 | |
e8d05480 JB |
9623 | /* Ignore functions with missing or empty names. These are actually |
9624 | illegal according to the DWARF standard. */ | |
9625 | if (name == NULL) | |
9626 | { | |
9627 | complaint (&symfile_complaints, | |
b64f50a1 JK |
9628 | _("missing name for subprogram DIE at %d"), |
9629 | die->offset.sect_off); | |
e8d05480 JB |
9630 | return; |
9631 | } | |
9632 | ||
9633 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
9634 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) | |
9635 | { | |
ae4d0c03 PM |
9636 | attr = dwarf2_attr (die, DW_AT_external, cu); |
9637 | if (!attr || !DW_UNSND (attr)) | |
9638 | complaint (&symfile_complaints, | |
3e43a32a MS |
9639 | _("cannot get low and high bounds " |
9640 | "for subprogram DIE at %d"), | |
b64f50a1 | 9641 | die->offset.sect_off); |
e8d05480 JB |
9642 | return; |
9643 | } | |
c906108c SS |
9644 | |
9645 | lowpc += baseaddr; | |
9646 | highpc += baseaddr; | |
9647 | ||
34eaf542 TT |
9648 | /* If we have any template arguments, then we must allocate a |
9649 | different sort of symbol. */ | |
9650 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
9651 | { | |
9652 | if (child_die->tag == DW_TAG_template_type_param | |
9653 | || child_die->tag == DW_TAG_template_value_param) | |
9654 | { | |
e623cf5d | 9655 | templ_func = allocate_template_symbol (objfile); |
34eaf542 TT |
9656 | templ_func->base.is_cplus_template_function = 1; |
9657 | break; | |
9658 | } | |
9659 | } | |
9660 | ||
c906108c | 9661 | new = push_context (0, lowpc); |
34eaf542 TT |
9662 | new->name = new_symbol_full (die, read_type_die (die, cu), cu, |
9663 | (struct symbol *) templ_func); | |
4c2df51b | 9664 | |
4cecd739 DJ |
9665 | /* If there is a location expression for DW_AT_frame_base, record |
9666 | it. */ | |
e142c38c | 9667 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
4c2df51b | 9668 | if (attr) |
f1e6e072 | 9669 | dwarf2_symbol_mark_computed (attr, new->name, cu, 1); |
4c2df51b | 9670 | |
e142c38c | 9671 | cu->list_in_scope = &local_symbols; |
c906108c | 9672 | |
639d11d3 | 9673 | if (die->child != NULL) |
c906108c | 9674 | { |
639d11d3 | 9675 | child_die = die->child; |
c906108c SS |
9676 | while (child_die && child_die->tag) |
9677 | { | |
34eaf542 TT |
9678 | if (child_die->tag == DW_TAG_template_type_param |
9679 | || child_die->tag == DW_TAG_template_value_param) | |
9680 | { | |
9681 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
9682 | ||
f1078f66 DJ |
9683 | if (arg != NULL) |
9684 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
9685 | } |
9686 | else | |
9687 | process_die (child_die, cu); | |
c906108c SS |
9688 | child_die = sibling_die (child_die); |
9689 | } | |
9690 | } | |
9691 | ||
d389af10 JK |
9692 | inherit_abstract_dies (die, cu); |
9693 | ||
4a811a97 UW |
9694 | /* If we have a DW_AT_specification, we might need to import using |
9695 | directives from the context of the specification DIE. See the | |
9696 | comment in determine_prefix. */ | |
9697 | if (cu->language == language_cplus | |
9698 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
9699 | { | |
9700 | struct dwarf2_cu *spec_cu = cu; | |
9701 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
9702 | ||
9703 | while (spec_die) | |
9704 | { | |
9705 | child_die = spec_die->child; | |
9706 | while (child_die && child_die->tag) | |
9707 | { | |
9708 | if (child_die->tag == DW_TAG_imported_module) | |
9709 | process_die (child_die, spec_cu); | |
9710 | child_die = sibling_die (child_die); | |
9711 | } | |
9712 | ||
9713 | /* In some cases, GCC generates specification DIEs that | |
9714 | themselves contain DW_AT_specification attributes. */ | |
9715 | spec_die = die_specification (spec_die, &spec_cu); | |
9716 | } | |
9717 | } | |
9718 | ||
c906108c SS |
9719 | new = pop_context (); |
9720 | /* Make a block for the local symbols within. */ | |
801e3a5b JB |
9721 | block = finish_block (new->name, &local_symbols, new->old_blocks, |
9722 | lowpc, highpc, objfile); | |
9723 | ||
df8a16a1 | 9724 | /* For C++, set the block's scope. */ |
195a3f6c | 9725 | if ((cu->language == language_cplus || cu->language == language_fortran) |
4d4ec4e5 | 9726 | && cu->processing_has_namespace_info) |
195a3f6c TT |
9727 | block_set_scope (block, determine_prefix (die, cu), |
9728 | &objfile->objfile_obstack); | |
df8a16a1 | 9729 | |
801e3a5b JB |
9730 | /* If we have address ranges, record them. */ |
9731 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 9732 | |
34eaf542 TT |
9733 | /* Attach template arguments to function. */ |
9734 | if (! VEC_empty (symbolp, template_args)) | |
9735 | { | |
9736 | gdb_assert (templ_func != NULL); | |
9737 | ||
9738 | templ_func->n_template_arguments = VEC_length (symbolp, template_args); | |
9739 | templ_func->template_arguments | |
9740 | = obstack_alloc (&objfile->objfile_obstack, | |
9741 | (templ_func->n_template_arguments | |
9742 | * sizeof (struct symbol *))); | |
9743 | memcpy (templ_func->template_arguments, | |
9744 | VEC_address (symbolp, template_args), | |
9745 | (templ_func->n_template_arguments * sizeof (struct symbol *))); | |
9746 | VEC_free (symbolp, template_args); | |
9747 | } | |
9748 | ||
208d8187 JB |
9749 | /* In C++, we can have functions nested inside functions (e.g., when |
9750 | a function declares a class that has methods). This means that | |
9751 | when we finish processing a function scope, we may need to go | |
9752 | back to building a containing block's symbol lists. */ | |
9753 | local_symbols = new->locals; | |
27aa8d6a | 9754 | using_directives = new->using_directives; |
208d8187 | 9755 | |
921e78cf JB |
9756 | /* If we've finished processing a top-level function, subsequent |
9757 | symbols go in the file symbol list. */ | |
9758 | if (outermost_context_p ()) | |
e142c38c | 9759 | cu->list_in_scope = &file_symbols; |
c906108c SS |
9760 | } |
9761 | ||
9762 | /* Process all the DIES contained within a lexical block scope. Start | |
9763 | a new scope, process the dies, and then close the scope. */ | |
9764 | ||
9765 | static void | |
e7c27a73 | 9766 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9767 | { |
e7c27a73 | 9768 | struct objfile *objfile = cu->objfile; |
52f0bd74 | 9769 | struct context_stack *new; |
c906108c SS |
9770 | CORE_ADDR lowpc, highpc; |
9771 | struct die_info *child_die; | |
e142c38c DJ |
9772 | CORE_ADDR baseaddr; |
9773 | ||
9774 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c SS |
9775 | |
9776 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
9777 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
9778 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 9779 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 9780 | describe ranges. */ |
d85a05f0 | 9781 | if (!dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
c906108c SS |
9782 | return; |
9783 | lowpc += baseaddr; | |
9784 | highpc += baseaddr; | |
9785 | ||
9786 | push_context (0, lowpc); | |
639d11d3 | 9787 | if (die->child != NULL) |
c906108c | 9788 | { |
639d11d3 | 9789 | child_die = die->child; |
c906108c SS |
9790 | while (child_die && child_die->tag) |
9791 | { | |
e7c27a73 | 9792 | process_die (child_die, cu); |
c906108c SS |
9793 | child_die = sibling_die (child_die); |
9794 | } | |
9795 | } | |
9796 | new = pop_context (); | |
9797 | ||
8540c487 | 9798 | if (local_symbols != NULL || using_directives != NULL) |
c906108c | 9799 | { |
801e3a5b JB |
9800 | struct block *block |
9801 | = finish_block (0, &local_symbols, new->old_blocks, new->start_addr, | |
9802 | highpc, objfile); | |
9803 | ||
9804 | /* Note that recording ranges after traversing children, as we | |
9805 | do here, means that recording a parent's ranges entails | |
9806 | walking across all its children's ranges as they appear in | |
9807 | the address map, which is quadratic behavior. | |
9808 | ||
9809 | It would be nicer to record the parent's ranges before | |
9810 | traversing its children, simply overriding whatever you find | |
9811 | there. But since we don't even decide whether to create a | |
9812 | block until after we've traversed its children, that's hard | |
9813 | to do. */ | |
9814 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c SS |
9815 | } |
9816 | local_symbols = new->locals; | |
27aa8d6a | 9817 | using_directives = new->using_directives; |
c906108c SS |
9818 | } |
9819 | ||
96408a79 SA |
9820 | /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */ |
9821 | ||
9822 | static void | |
9823 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
9824 | { | |
9825 | struct objfile *objfile = cu->objfile; | |
9826 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
9827 | CORE_ADDR pc, baseaddr; | |
9828 | struct attribute *attr; | |
9829 | struct call_site *call_site, call_site_local; | |
9830 | void **slot; | |
9831 | int nparams; | |
9832 | struct die_info *child_die; | |
9833 | ||
9834 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
9835 | ||
9836 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
9837 | if (!attr) | |
9838 | { | |
9839 | complaint (&symfile_complaints, | |
9840 | _("missing DW_AT_low_pc for DW_TAG_GNU_call_site " | |
9841 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9842 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9843 | return; |
9844 | } | |
9845 | pc = DW_ADDR (attr) + baseaddr; | |
9846 | ||
9847 | if (cu->call_site_htab == NULL) | |
9848 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
9849 | NULL, &objfile->objfile_obstack, | |
9850 | hashtab_obstack_allocate, NULL); | |
9851 | call_site_local.pc = pc; | |
9852 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
9853 | if (*slot != NULL) | |
9854 | { | |
9855 | complaint (&symfile_complaints, | |
9856 | _("Duplicate PC %s for DW_TAG_GNU_call_site " | |
9857 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9858 | paddress (gdbarch, pc), die->offset.sect_off, objfile->name); |
96408a79 SA |
9859 | return; |
9860 | } | |
9861 | ||
9862 | /* Count parameters at the caller. */ | |
9863 | ||
9864 | nparams = 0; | |
9865 | for (child_die = die->child; child_die && child_die->tag; | |
9866 | child_die = sibling_die (child_die)) | |
9867 | { | |
9868 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
9869 | { | |
9870 | complaint (&symfile_complaints, | |
9871 | _("Tag %d is not DW_TAG_GNU_call_site_parameter in " | |
9872 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 9873 | child_die->tag, child_die->offset.sect_off, objfile->name); |
96408a79 SA |
9874 | continue; |
9875 | } | |
9876 | ||
9877 | nparams++; | |
9878 | } | |
9879 | ||
9880 | call_site = obstack_alloc (&objfile->objfile_obstack, | |
9881 | (sizeof (*call_site) | |
9882 | + (sizeof (*call_site->parameter) | |
9883 | * (nparams - 1)))); | |
9884 | *slot = call_site; | |
9885 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
9886 | call_site->pc = pc; | |
9887 | ||
9888 | if (dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
9889 | { | |
9890 | struct die_info *func_die; | |
9891 | ||
9892 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
9893 | for (func_die = die->parent; | |
9894 | func_die && func_die->tag != DW_TAG_subprogram | |
9895 | && func_die->tag != DW_TAG_subroutine_type; | |
9896 | func_die = func_die->parent); | |
9897 | ||
9898 | /* DW_AT_GNU_all_call_sites is a superset | |
9899 | of DW_AT_GNU_all_tail_call_sites. */ | |
9900 | if (func_die | |
9901 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
9902 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) | |
9903 | { | |
9904 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
9905 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
9906 | both the initial caller containing the real return address PC and | |
9907 | the final callee containing the current PC of a chain of tail | |
9908 | calls do not need to have the tail call list complete. But any | |
9909 | function candidate for a virtual tail call frame searched via | |
9910 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
9911 | determined unambiguously. */ | |
9912 | } | |
9913 | else | |
9914 | { | |
9915 | struct type *func_type = NULL; | |
9916 | ||
9917 | if (func_die) | |
9918 | func_type = get_die_type (func_die, cu); | |
9919 | if (func_type != NULL) | |
9920 | { | |
9921 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
9922 | ||
9923 | /* Enlist this call site to the function. */ | |
9924 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
9925 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
9926 | } | |
9927 | else | |
9928 | complaint (&symfile_complaints, | |
9929 | _("Cannot find function owning DW_TAG_GNU_call_site " | |
9930 | "DIE 0x%x [in module %s]"), | |
b64f50a1 | 9931 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9932 | } |
9933 | } | |
9934 | ||
9935 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
9936 | if (attr == NULL) | |
9937 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
9938 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); | |
9939 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
9940 | /* Keep NULL DWARF_BLOCK. */; | |
9941 | else if (attr_form_is_block (attr)) | |
9942 | { | |
9943 | struct dwarf2_locexpr_baton *dlbaton; | |
9944 | ||
9945 | dlbaton = obstack_alloc (&objfile->objfile_obstack, sizeof (*dlbaton)); | |
9946 | dlbaton->data = DW_BLOCK (attr)->data; | |
9947 | dlbaton->size = DW_BLOCK (attr)->size; | |
9948 | dlbaton->per_cu = cu->per_cu; | |
9949 | ||
9950 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
9951 | } | |
9952 | else if (is_ref_attr (attr)) | |
9953 | { | |
96408a79 SA |
9954 | struct dwarf2_cu *target_cu = cu; |
9955 | struct die_info *target_die; | |
9956 | ||
ac9ec31b | 9957 | target_die = follow_die_ref (die, attr, &target_cu); |
96408a79 SA |
9958 | gdb_assert (target_cu->objfile == objfile); |
9959 | if (die_is_declaration (target_die, target_cu)) | |
9960 | { | |
9112db09 JK |
9961 | const char *target_physname = NULL; |
9962 | struct attribute *target_attr; | |
9963 | ||
9964 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
9965 | target_attr = dwarf2_attr (target_die, DW_AT_linkage_name, target_cu); | |
9966 | if (target_attr == NULL) | |
9967 | target_attr = dwarf2_attr (target_die, DW_AT_MIPS_linkage_name, | |
9968 | target_cu); | |
9969 | if (target_attr != NULL && DW_STRING (target_attr) != NULL) | |
9970 | target_physname = DW_STRING (target_attr); | |
9971 | else | |
9972 | target_physname = dwarf2_physname (NULL, target_die, target_cu); | |
96408a79 SA |
9973 | if (target_physname == NULL) |
9974 | complaint (&symfile_complaints, | |
9975 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
9976 | "physname, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 9977 | die->offset.sect_off, objfile->name); |
96408a79 | 9978 | else |
7d455152 | 9979 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
9980 | } |
9981 | else | |
9982 | { | |
9983 | CORE_ADDR lowpc; | |
9984 | ||
9985 | /* DW_AT_entry_pc should be preferred. */ | |
9986 | if (!dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL)) | |
9987 | complaint (&symfile_complaints, | |
9988 | _("DW_AT_GNU_call_site_target target DIE has invalid " | |
9989 | "low pc, for referencing DIE 0x%x [in module %s]"), | |
b64f50a1 | 9990 | die->offset.sect_off, objfile->name); |
96408a79 SA |
9991 | else |
9992 | SET_FIELD_PHYSADDR (call_site->target, lowpc + baseaddr); | |
9993 | } | |
9994 | } | |
9995 | else | |
9996 | complaint (&symfile_complaints, | |
9997 | _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither " | |
9998 | "block nor reference, for DIE 0x%x [in module %s]"), | |
b64f50a1 | 9999 | die->offset.sect_off, objfile->name); |
96408a79 SA |
10000 | |
10001 | call_site->per_cu = cu->per_cu; | |
10002 | ||
10003 | for (child_die = die->child; | |
10004 | child_die && child_die->tag; | |
10005 | child_die = sibling_die (child_die)) | |
10006 | { | |
96408a79 | 10007 | struct call_site_parameter *parameter; |
1788b2d3 | 10008 | struct attribute *loc, *origin; |
96408a79 SA |
10009 | |
10010 | if (child_die->tag != DW_TAG_GNU_call_site_parameter) | |
10011 | { | |
10012 | /* Already printed the complaint above. */ | |
10013 | continue; | |
10014 | } | |
10015 | ||
10016 | gdb_assert (call_site->parameter_count < nparams); | |
10017 | parameter = &call_site->parameter[call_site->parameter_count]; | |
10018 | ||
1788b2d3 JK |
10019 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
10020 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
10021 | register is contained in DW_AT_GNU_call_site_value. */ | |
96408a79 | 10022 | |
24c5c679 | 10023 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
1788b2d3 JK |
10024 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); |
10025 | if (loc == NULL && origin != NULL && is_ref_attr (origin)) | |
10026 | { | |
10027 | sect_offset offset; | |
10028 | ||
10029 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; | |
10030 | offset = dwarf2_get_ref_die_offset (origin); | |
d76b7dbc JK |
10031 | if (!offset_in_cu_p (&cu->header, offset)) |
10032 | { | |
10033 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
10034 | binding can be done only inside one CU. Such referenced DIE | |
10035 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
10036 | complaint (&symfile_complaints, | |
10037 | _("DW_AT_abstract_origin offset is not in CU for " | |
10038 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
10039 | "[in module %s]"), | |
10040 | child_die->offset.sect_off, objfile->name); | |
10041 | continue; | |
10042 | } | |
1788b2d3 JK |
10043 | parameter->u.param_offset.cu_off = (offset.sect_off |
10044 | - cu->header.offset.sect_off); | |
10045 | } | |
10046 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 SA |
10047 | { |
10048 | complaint (&symfile_complaints, | |
10049 | _("No DW_FORM_block* DW_AT_location for " | |
10050 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 10051 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
10052 | continue; |
10053 | } | |
24c5c679 | 10054 | else |
96408a79 | 10055 | { |
24c5c679 JK |
10056 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
10057 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
10058 | if (parameter->u.dwarf_reg != -1) | |
10059 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
10060 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
10061 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
10062 | ¶meter->u.fb_offset)) | |
10063 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
10064 | else | |
10065 | { | |
10066 | complaint (&symfile_complaints, | |
10067 | _("Only single DW_OP_reg or DW_OP_fbreg is supported " | |
10068 | "for DW_FORM_block* DW_AT_location is supported for " | |
10069 | "DW_TAG_GNU_call_site child DIE 0x%x " | |
10070 | "[in module %s]"), | |
10071 | child_die->offset.sect_off, objfile->name); | |
10072 | continue; | |
10073 | } | |
96408a79 SA |
10074 | } |
10075 | ||
10076 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
10077 | if (!attr_form_is_block (attr)) | |
10078 | { | |
10079 | complaint (&symfile_complaints, | |
10080 | _("No DW_FORM_block* DW_AT_GNU_call_site_value for " | |
10081 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 10082 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
10083 | continue; |
10084 | } | |
10085 | parameter->value = DW_BLOCK (attr)->data; | |
10086 | parameter->value_size = DW_BLOCK (attr)->size; | |
10087 | ||
10088 | /* Parameters are not pre-cleared by memset above. */ | |
10089 | parameter->data_value = NULL; | |
10090 | parameter->data_value_size = 0; | |
10091 | call_site->parameter_count++; | |
10092 | ||
10093 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
10094 | if (attr) | |
10095 | { | |
10096 | if (!attr_form_is_block (attr)) | |
10097 | complaint (&symfile_complaints, | |
10098 | _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for " | |
10099 | "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"), | |
b64f50a1 | 10100 | child_die->offset.sect_off, objfile->name); |
96408a79 SA |
10101 | else |
10102 | { | |
10103 | parameter->data_value = DW_BLOCK (attr)->data; | |
10104 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
10105 | } | |
10106 | } | |
10107 | } | |
10108 | } | |
10109 | ||
43039443 | 10110 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. |
ff013f42 JK |
10111 | Return 1 if the attributes are present and valid, otherwise, return 0. |
10112 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
43039443 JK |
10113 | |
10114 | static int | |
10115 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
ff013f42 JK |
10116 | CORE_ADDR *high_return, struct dwarf2_cu *cu, |
10117 | struct partial_symtab *ranges_pst) | |
43039443 JK |
10118 | { |
10119 | struct objfile *objfile = cu->objfile; | |
10120 | struct comp_unit_head *cu_header = &cu->header; | |
10121 | bfd *obfd = objfile->obfd; | |
10122 | unsigned int addr_size = cu_header->addr_size; | |
10123 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
10124 | /* Base address selection entry. */ | |
10125 | CORE_ADDR base; | |
10126 | int found_base; | |
10127 | unsigned int dummy; | |
d521ce57 | 10128 | const gdb_byte *buffer; |
43039443 JK |
10129 | CORE_ADDR marker; |
10130 | int low_set; | |
10131 | CORE_ADDR low = 0; | |
10132 | CORE_ADDR high = 0; | |
ff013f42 | 10133 | CORE_ADDR baseaddr; |
43039443 | 10134 | |
d00adf39 DE |
10135 | found_base = cu->base_known; |
10136 | base = cu->base_address; | |
43039443 | 10137 | |
be391dca | 10138 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 10139 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 JK |
10140 | { |
10141 | complaint (&symfile_complaints, | |
10142 | _("Offset %d out of bounds for DW_AT_ranges attribute"), | |
10143 | offset); | |
10144 | return 0; | |
10145 | } | |
dce234bc | 10146 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 JK |
10147 | |
10148 | /* Read in the largest possible address. */ | |
10149 | marker = read_address (obfd, buffer, cu, &dummy); | |
10150 | if ((marker & mask) == mask) | |
10151 | { | |
10152 | /* If we found the largest possible address, then | |
10153 | read the base address. */ | |
10154 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
10155 | buffer += 2 * addr_size; | |
10156 | offset += 2 * addr_size; | |
10157 | found_base = 1; | |
10158 | } | |
10159 | ||
10160 | low_set = 0; | |
10161 | ||
e7030f15 | 10162 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); |
ff013f42 | 10163 | |
43039443 JK |
10164 | while (1) |
10165 | { | |
10166 | CORE_ADDR range_beginning, range_end; | |
10167 | ||
10168 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
10169 | buffer += addr_size; | |
10170 | range_end = read_address (obfd, buffer, cu, &dummy); | |
10171 | buffer += addr_size; | |
10172 | offset += 2 * addr_size; | |
10173 | ||
10174 | /* An end of list marker is a pair of zero addresses. */ | |
10175 | if (range_beginning == 0 && range_end == 0) | |
10176 | /* Found the end of list entry. */ | |
10177 | break; | |
10178 | ||
10179 | /* Each base address selection entry is a pair of 2 values. | |
10180 | The first is the largest possible address, the second is | |
10181 | the base address. Check for a base address here. */ | |
10182 | if ((range_beginning & mask) == mask) | |
10183 | { | |
10184 | /* If we found the largest possible address, then | |
10185 | read the base address. */ | |
10186 | base = read_address (obfd, buffer + addr_size, cu, &dummy); | |
10187 | found_base = 1; | |
10188 | continue; | |
10189 | } | |
10190 | ||
10191 | if (!found_base) | |
10192 | { | |
10193 | /* We have no valid base address for the ranges | |
10194 | data. */ | |
10195 | complaint (&symfile_complaints, | |
10196 | _("Invalid .debug_ranges data (no base address)")); | |
10197 | return 0; | |
10198 | } | |
10199 | ||
9277c30c UW |
10200 | if (range_beginning > range_end) |
10201 | { | |
10202 | /* Inverted range entries are invalid. */ | |
10203 | complaint (&symfile_complaints, | |
10204 | _("Invalid .debug_ranges data (inverted range)")); | |
10205 | return 0; | |
10206 | } | |
10207 | ||
10208 | /* Empty range entries have no effect. */ | |
10209 | if (range_beginning == range_end) | |
10210 | continue; | |
10211 | ||
43039443 JK |
10212 | range_beginning += base; |
10213 | range_end += base; | |
10214 | ||
01093045 DE |
10215 | /* A not-uncommon case of bad debug info. |
10216 | Don't pollute the addrmap with bad data. */ | |
10217 | if (range_beginning + baseaddr == 0 | |
10218 | && !dwarf2_per_objfile->has_section_at_zero) | |
10219 | { | |
10220 | complaint (&symfile_complaints, | |
10221 | _(".debug_ranges entry has start address of zero" | |
10222 | " [in module %s]"), objfile->name); | |
10223 | continue; | |
10224 | } | |
10225 | ||
9277c30c | 10226 | if (ranges_pst != NULL) |
ff013f42 | 10227 | addrmap_set_empty (objfile->psymtabs_addrmap, |
3e43a32a MS |
10228 | range_beginning + baseaddr, |
10229 | range_end - 1 + baseaddr, | |
ff013f42 JK |
10230 | ranges_pst); |
10231 | ||
43039443 JK |
10232 | /* FIXME: This is recording everything as a low-high |
10233 | segment of consecutive addresses. We should have a | |
10234 | data structure for discontiguous block ranges | |
10235 | instead. */ | |
10236 | if (! low_set) | |
10237 | { | |
10238 | low = range_beginning; | |
10239 | high = range_end; | |
10240 | low_set = 1; | |
10241 | } | |
10242 | else | |
10243 | { | |
10244 | if (range_beginning < low) | |
10245 | low = range_beginning; | |
10246 | if (range_end > high) | |
10247 | high = range_end; | |
10248 | } | |
10249 | } | |
10250 | ||
10251 | if (! low_set) | |
10252 | /* If the first entry is an end-of-list marker, the range | |
10253 | describes an empty scope, i.e. no instructions. */ | |
10254 | return 0; | |
10255 | ||
10256 | if (low_return) | |
10257 | *low_return = low; | |
10258 | if (high_return) | |
10259 | *high_return = high; | |
10260 | return 1; | |
10261 | } | |
10262 | ||
af34e669 DJ |
10263 | /* Get low and high pc attributes from a die. Return 1 if the attributes |
10264 | are present and valid, otherwise, return 0. Return -1 if the range is | |
10265 | discontinuous, i.e. derived from DW_AT_ranges information. */ | |
380bca97 | 10266 | |
c906108c | 10267 | static int |
af34e669 | 10268 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
10269 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
10270 | struct partial_symtab *pst) | |
c906108c SS |
10271 | { |
10272 | struct attribute *attr; | |
91da1414 | 10273 | struct attribute *attr_high; |
af34e669 DJ |
10274 | CORE_ADDR low = 0; |
10275 | CORE_ADDR high = 0; | |
10276 | int ret = 0; | |
c906108c | 10277 | |
91da1414 MW |
10278 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10279 | if (attr_high) | |
af34e669 | 10280 | { |
e142c38c | 10281 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
af34e669 | 10282 | if (attr) |
91da1414 MW |
10283 | { |
10284 | low = DW_ADDR (attr); | |
3019eac3 DE |
10285 | if (attr_high->form == DW_FORM_addr |
10286 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10287 | high = DW_ADDR (attr_high); |
10288 | else | |
10289 | high = low + DW_UNSND (attr_high); | |
10290 | } | |
af34e669 DJ |
10291 | else |
10292 | /* Found high w/o low attribute. */ | |
10293 | return 0; | |
10294 | ||
10295 | /* Found consecutive range of addresses. */ | |
10296 | ret = 1; | |
10297 | } | |
c906108c | 10298 | else |
af34e669 | 10299 | { |
e142c38c | 10300 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
10301 | if (attr != NULL) |
10302 | { | |
ab435259 DE |
10303 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
10304 | We take advantage of the fact that DW_AT_ranges does not appear | |
10305 | in DW_TAG_compile_unit of DWO files. */ | |
10306 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
10307 | unsigned int ranges_offset = (DW_UNSND (attr) | |
10308 | + (need_ranges_base | |
10309 | ? cu->ranges_base | |
10310 | : 0)); | |
2e3cf129 | 10311 | |
af34e669 | 10312 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 10313 | .debug_ranges section. */ |
2e3cf129 | 10314 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
af34e669 | 10315 | return 0; |
43039443 | 10316 | /* Found discontinuous range of addresses. */ |
af34e669 DJ |
10317 | ret = -1; |
10318 | } | |
10319 | } | |
c906108c | 10320 | |
9373cf26 JK |
10321 | /* read_partial_die has also the strict LOW < HIGH requirement. */ |
10322 | if (high <= low) | |
c906108c SS |
10323 | return 0; |
10324 | ||
10325 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
10326 | eliminate duplicate copies of functions and vtables and such. | |
10327 | The linker will arbitrarily choose one and discard the others. | |
10328 | The AT_*_pc values for such functions refer to local labels in | |
10329 | these sections. If the section from that file was discarded, the | |
10330 | labels are not in the output, so the relocs get a value of 0. | |
10331 | If this is a discarded function, mark the pc bounds as invalid, | |
10332 | so that GDB will ignore it. */ | |
72dca2f5 | 10333 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
c906108c SS |
10334 | return 0; |
10335 | ||
10336 | *lowpc = low; | |
96408a79 SA |
10337 | if (highpc) |
10338 | *highpc = high; | |
af34e669 | 10339 | return ret; |
c906108c SS |
10340 | } |
10341 | ||
b084d499 JB |
10342 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
10343 | its low and high PC addresses. Do nothing if these addresses could not | |
10344 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
10345 | and HIGHPC to the high address if greater than HIGHPC. */ | |
10346 | ||
10347 | static void | |
10348 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
10349 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10350 | struct dwarf2_cu *cu) | |
10351 | { | |
10352 | CORE_ADDR low, high; | |
10353 | struct die_info *child = die->child; | |
10354 | ||
d85a05f0 | 10355 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL)) |
b084d499 JB |
10356 | { |
10357 | *lowpc = min (*lowpc, low); | |
10358 | *highpc = max (*highpc, high); | |
10359 | } | |
10360 | ||
10361 | /* If the language does not allow nested subprograms (either inside | |
10362 | subprograms or lexical blocks), we're done. */ | |
10363 | if (cu->language != language_ada) | |
10364 | return; | |
6e70227d | 10365 | |
b084d499 JB |
10366 | /* Check all the children of the given DIE. If it contains nested |
10367 | subprograms, then check their pc bounds. Likewise, we need to | |
10368 | check lexical blocks as well, as they may also contain subprogram | |
10369 | definitions. */ | |
10370 | while (child && child->tag) | |
10371 | { | |
10372 | if (child->tag == DW_TAG_subprogram | |
10373 | || child->tag == DW_TAG_lexical_block) | |
10374 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
10375 | child = sibling_die (child); | |
10376 | } | |
10377 | } | |
10378 | ||
fae299cd DC |
10379 | /* Get the low and high pc's represented by the scope DIE, and store |
10380 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
10381 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
10382 | ||
10383 | static void | |
10384 | get_scope_pc_bounds (struct die_info *die, | |
10385 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
10386 | struct dwarf2_cu *cu) | |
10387 | { | |
10388 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
10389 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
10390 | CORE_ADDR current_low, current_high; | |
10391 | ||
d85a05f0 | 10392 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL)) |
fae299cd DC |
10393 | { |
10394 | best_low = current_low; | |
10395 | best_high = current_high; | |
10396 | } | |
10397 | else | |
10398 | { | |
10399 | struct die_info *child = die->child; | |
10400 | ||
10401 | while (child && child->tag) | |
10402 | { | |
10403 | switch (child->tag) { | |
10404 | case DW_TAG_subprogram: | |
b084d499 | 10405 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
10406 | break; |
10407 | case DW_TAG_namespace: | |
f55ee35c | 10408 | case DW_TAG_module: |
fae299cd DC |
10409 | /* FIXME: carlton/2004-01-16: Should we do this for |
10410 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
10411 | that current GCC's always emit the DIEs corresponding | |
10412 | to definitions of methods of classes as children of a | |
10413 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
10414 | the DIEs giving the declarations, which could be | |
10415 | anywhere). But I don't see any reason why the | |
10416 | standards says that they have to be there. */ | |
10417 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
10418 | ||
10419 | if (current_low != ((CORE_ADDR) -1)) | |
10420 | { | |
10421 | best_low = min (best_low, current_low); | |
10422 | best_high = max (best_high, current_high); | |
10423 | } | |
10424 | break; | |
10425 | default: | |
0963b4bd | 10426 | /* Ignore. */ |
fae299cd DC |
10427 | break; |
10428 | } | |
10429 | ||
10430 | child = sibling_die (child); | |
10431 | } | |
10432 | } | |
10433 | ||
10434 | *lowpc = best_low; | |
10435 | *highpc = best_high; | |
10436 | } | |
10437 | ||
801e3a5b JB |
10438 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
10439 | in DIE. */ | |
380bca97 | 10440 | |
801e3a5b JB |
10441 | static void |
10442 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
10443 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
10444 | { | |
bb5ed363 | 10445 | struct objfile *objfile = cu->objfile; |
801e3a5b | 10446 | struct attribute *attr; |
91da1414 | 10447 | struct attribute *attr_high; |
801e3a5b | 10448 | |
91da1414 MW |
10449 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
10450 | if (attr_high) | |
801e3a5b | 10451 | { |
801e3a5b JB |
10452 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
10453 | if (attr) | |
10454 | { | |
10455 | CORE_ADDR low = DW_ADDR (attr); | |
91da1414 | 10456 | CORE_ADDR high; |
3019eac3 DE |
10457 | if (attr_high->form == DW_FORM_addr |
10458 | || attr_high->form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
10459 | high = DW_ADDR (attr_high); |
10460 | else | |
10461 | high = low + DW_UNSND (attr_high); | |
9a619af0 | 10462 | |
801e3a5b JB |
10463 | record_block_range (block, baseaddr + low, baseaddr + high - 1); |
10464 | } | |
10465 | } | |
10466 | ||
10467 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
10468 | if (attr) | |
10469 | { | |
bb5ed363 | 10470 | bfd *obfd = objfile->obfd; |
ab435259 DE |
10471 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
10472 | We take advantage of the fact that DW_AT_ranges does not appear | |
10473 | in DW_TAG_compile_unit of DWO files. */ | |
10474 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
10475 | |
10476 | /* The value of the DW_AT_ranges attribute is the offset of the | |
10477 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
10478 | unsigned long offset = (DW_UNSND (attr) |
10479 | + (need_ranges_base ? cu->ranges_base : 0)); | |
d521ce57 | 10480 | const gdb_byte *buffer = dwarf2_per_objfile->ranges.buffer + offset; |
801e3a5b JB |
10481 | |
10482 | /* For some target architectures, but not others, the | |
10483 | read_address function sign-extends the addresses it returns. | |
10484 | To recognize base address selection entries, we need a | |
10485 | mask. */ | |
10486 | unsigned int addr_size = cu->header.addr_size; | |
10487 | CORE_ADDR base_select_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
10488 | ||
10489 | /* The base address, to which the next pair is relative. Note | |
10490 | that this 'base' is a DWARF concept: most entries in a range | |
10491 | list are relative, to reduce the number of relocs against the | |
10492 | debugging information. This is separate from this function's | |
10493 | 'baseaddr' argument, which GDB uses to relocate debugging | |
10494 | information from a shared library based on the address at | |
10495 | which the library was loaded. */ | |
d00adf39 DE |
10496 | CORE_ADDR base = cu->base_address; |
10497 | int base_known = cu->base_known; | |
801e3a5b | 10498 | |
be391dca | 10499 | gdb_assert (dwarf2_per_objfile->ranges.readin); |
dce234bc | 10500 | if (offset >= dwarf2_per_objfile->ranges.size) |
801e3a5b JB |
10501 | { |
10502 | complaint (&symfile_complaints, | |
10503 | _("Offset %lu out of bounds for DW_AT_ranges attribute"), | |
10504 | offset); | |
10505 | return; | |
10506 | } | |
10507 | ||
10508 | for (;;) | |
10509 | { | |
10510 | unsigned int bytes_read; | |
10511 | CORE_ADDR start, end; | |
10512 | ||
10513 | start = read_address (obfd, buffer, cu, &bytes_read); | |
10514 | buffer += bytes_read; | |
10515 | end = read_address (obfd, buffer, cu, &bytes_read); | |
10516 | buffer += bytes_read; | |
10517 | ||
10518 | /* Did we find the end of the range list? */ | |
10519 | if (start == 0 && end == 0) | |
10520 | break; | |
10521 | ||
10522 | /* Did we find a base address selection entry? */ | |
10523 | else if ((start & base_select_mask) == base_select_mask) | |
10524 | { | |
10525 | base = end; | |
10526 | base_known = 1; | |
10527 | } | |
10528 | ||
10529 | /* We found an ordinary address range. */ | |
10530 | else | |
10531 | { | |
10532 | if (!base_known) | |
10533 | { | |
10534 | complaint (&symfile_complaints, | |
3e43a32a MS |
10535 | _("Invalid .debug_ranges data " |
10536 | "(no base address)")); | |
801e3a5b JB |
10537 | return; |
10538 | } | |
10539 | ||
9277c30c UW |
10540 | if (start > end) |
10541 | { | |
10542 | /* Inverted range entries are invalid. */ | |
10543 | complaint (&symfile_complaints, | |
10544 | _("Invalid .debug_ranges data " | |
10545 | "(inverted range)")); | |
10546 | return; | |
10547 | } | |
10548 | ||
10549 | /* Empty range entries have no effect. */ | |
10550 | if (start == end) | |
10551 | continue; | |
10552 | ||
01093045 DE |
10553 | start += base + baseaddr; |
10554 | end += base + baseaddr; | |
10555 | ||
10556 | /* A not-uncommon case of bad debug info. | |
10557 | Don't pollute the addrmap with bad data. */ | |
10558 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
10559 | { | |
10560 | complaint (&symfile_complaints, | |
10561 | _(".debug_ranges entry has start address of zero" | |
10562 | " [in module %s]"), objfile->name); | |
10563 | continue; | |
10564 | } | |
10565 | ||
10566 | record_block_range (block, start, end - 1); | |
801e3a5b JB |
10567 | } |
10568 | } | |
10569 | } | |
10570 | } | |
10571 | ||
685b1105 JK |
10572 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
10573 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 10574 | |
685b1105 JK |
10575 | static void |
10576 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 JK |
10577 | { |
10578 | const char *cs; | |
10579 | int major, minor, release; | |
10580 | ||
10581 | if (cu->producer == NULL) | |
10582 | { | |
10583 | /* For unknown compilers expect their behavior is DWARF version | |
10584 | compliant. | |
10585 | ||
10586 | GCC started to support .debug_types sections by -gdwarf-4 since | |
10587 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
10588 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
10589 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
10590 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 10591 | } |
685b1105 | 10592 | else if (strncmp (cu->producer, "GNU ", strlen ("GNU ")) == 0) |
60d5a603 | 10593 | { |
685b1105 JK |
10594 | /* Skip any identifier after "GNU " - such as "C++" or "Java". */ |
10595 | ||
ba919b58 TT |
10596 | cs = &cu->producer[strlen ("GNU ")]; |
10597 | while (*cs && !isdigit (*cs)) | |
10598 | cs++; | |
10599 | if (sscanf (cs, "%d.%d.%d", &major, &minor, &release) != 3) | |
10600 | { | |
10601 | /* Not recognized as GCC. */ | |
10602 | } | |
10603 | else | |
1b80a9fa JK |
10604 | { |
10605 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); | |
10606 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
10607 | } | |
685b1105 JK |
10608 | } |
10609 | else if (strncmp (cu->producer, "Intel(R) C", strlen ("Intel(R) C")) == 0) | |
10610 | cu->producer_is_icc = 1; | |
10611 | else | |
10612 | { | |
10613 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
10614 | compliant. */ | |
60d5a603 JK |
10615 | } |
10616 | ||
ba919b58 | 10617 | cu->checked_producer = 1; |
685b1105 | 10618 | } |
ba919b58 | 10619 | |
685b1105 JK |
10620 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
10621 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
10622 | during 4.6.0 experimental. */ | |
10623 | ||
10624 | static int | |
10625 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) | |
10626 | { | |
10627 | if (!cu->checked_producer) | |
10628 | check_producer (cu); | |
10629 | ||
10630 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
10631 | } |
10632 | ||
10633 | /* Return the default accessibility type if it is not overriden by | |
10634 | DW_AT_accessibility. */ | |
10635 | ||
10636 | static enum dwarf_access_attribute | |
10637 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
10638 | { | |
10639 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
10640 | { | |
10641 | /* The default DWARF 2 accessibility for members is public, the default | |
10642 | accessibility for inheritance is private. */ | |
10643 | ||
10644 | if (die->tag != DW_TAG_inheritance) | |
10645 | return DW_ACCESS_public; | |
10646 | else | |
10647 | return DW_ACCESS_private; | |
10648 | } | |
10649 | else | |
10650 | { | |
10651 | /* DWARF 3+ defines the default accessibility a different way. The same | |
10652 | rules apply now for DW_TAG_inheritance as for the members and it only | |
10653 | depends on the container kind. */ | |
10654 | ||
10655 | if (die->parent->tag == DW_TAG_class_type) | |
10656 | return DW_ACCESS_private; | |
10657 | else | |
10658 | return DW_ACCESS_public; | |
10659 | } | |
10660 | } | |
10661 | ||
74ac6d43 TT |
10662 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
10663 | offset. If the attribute was not found return 0, otherwise return | |
10664 | 1. If it was found but could not properly be handled, set *OFFSET | |
10665 | to 0. */ | |
10666 | ||
10667 | static int | |
10668 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
10669 | LONGEST *offset) | |
10670 | { | |
10671 | struct attribute *attr; | |
10672 | ||
10673 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
10674 | if (attr != NULL) | |
10675 | { | |
10676 | *offset = 0; | |
10677 | ||
10678 | /* Note that we do not check for a section offset first here. | |
10679 | This is because DW_AT_data_member_location is new in DWARF 4, | |
10680 | so if we see it, we can assume that a constant form is really | |
10681 | a constant and not a section offset. */ | |
10682 | if (attr_form_is_constant (attr)) | |
10683 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
10684 | else if (attr_form_is_section_offset (attr)) | |
10685 | dwarf2_complex_location_expr_complaint (); | |
10686 | else if (attr_form_is_block (attr)) | |
10687 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
10688 | else | |
10689 | dwarf2_complex_location_expr_complaint (); | |
10690 | ||
10691 | return 1; | |
10692 | } | |
10693 | ||
10694 | return 0; | |
10695 | } | |
10696 | ||
c906108c SS |
10697 | /* Add an aggregate field to the field list. */ |
10698 | ||
10699 | static void | |
107d2387 | 10700 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 10701 | struct dwarf2_cu *cu) |
6e70227d | 10702 | { |
e7c27a73 | 10703 | struct objfile *objfile = cu->objfile; |
5e2b427d | 10704 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
10705 | struct nextfield *new_field; |
10706 | struct attribute *attr; | |
10707 | struct field *fp; | |
15d034d0 | 10708 | const char *fieldname = ""; |
c906108c SS |
10709 | |
10710 | /* Allocate a new field list entry and link it in. */ | |
10711 | new_field = (struct nextfield *) xmalloc (sizeof (struct nextfield)); | |
b8c9b27d | 10712 | make_cleanup (xfree, new_field); |
c906108c | 10713 | memset (new_field, 0, sizeof (struct nextfield)); |
7d0ccb61 DJ |
10714 | |
10715 | if (die->tag == DW_TAG_inheritance) | |
10716 | { | |
10717 | new_field->next = fip->baseclasses; | |
10718 | fip->baseclasses = new_field; | |
10719 | } | |
10720 | else | |
10721 | { | |
10722 | new_field->next = fip->fields; | |
10723 | fip->fields = new_field; | |
10724 | } | |
c906108c SS |
10725 | fip->nfields++; |
10726 | ||
e142c38c | 10727 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c SS |
10728 | if (attr) |
10729 | new_field->accessibility = DW_UNSND (attr); | |
60d5a603 JK |
10730 | else |
10731 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
10732 | if (new_field->accessibility != DW_ACCESS_public) |
10733 | fip->non_public_fields = 1; | |
60d5a603 | 10734 | |
e142c38c | 10735 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
c906108c SS |
10736 | if (attr) |
10737 | new_field->virtuality = DW_UNSND (attr); | |
60d5a603 JK |
10738 | else |
10739 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
10740 | |
10741 | fp = &new_field->field; | |
a9a9bd0f | 10742 | |
e142c38c | 10743 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 10744 | { |
74ac6d43 TT |
10745 | LONGEST offset; |
10746 | ||
a9a9bd0f | 10747 | /* Data member other than a C++ static data member. */ |
6e70227d | 10748 | |
c906108c | 10749 | /* Get type of field. */ |
e7c27a73 | 10750 | fp->type = die_type (die, cu); |
c906108c | 10751 | |
d6a843b5 | 10752 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 10753 | |
c906108c | 10754 | /* Get bit size of field (zero if none). */ |
e142c38c | 10755 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
c906108c SS |
10756 | if (attr) |
10757 | { | |
10758 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
10759 | } | |
10760 | else | |
10761 | { | |
10762 | FIELD_BITSIZE (*fp) = 0; | |
10763 | } | |
10764 | ||
10765 | /* Get bit offset of field. */ | |
74ac6d43 TT |
10766 | if (handle_data_member_location (die, cu, &offset)) |
10767 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 10768 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
c906108c SS |
10769 | if (attr) |
10770 | { | |
5e2b427d | 10771 | if (gdbarch_bits_big_endian (gdbarch)) |
c906108c SS |
10772 | { |
10773 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
10774 | additional bit offset from the MSB of the containing |
10775 | anonymous object to the MSB of the field. We don't | |
10776 | have to do anything special since we don't need to | |
10777 | know the size of the anonymous object. */ | |
f41f5e61 | 10778 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
10779 | } |
10780 | else | |
10781 | { | |
10782 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
10783 | MSB of the anonymous object, subtract off the number of |
10784 | bits from the MSB of the field to the MSB of the | |
10785 | object, and then subtract off the number of bits of | |
10786 | the field itself. The result is the bit offset of | |
10787 | the LSB of the field. */ | |
c906108c SS |
10788 | int anonymous_size; |
10789 | int bit_offset = DW_UNSND (attr); | |
10790 | ||
e142c38c | 10791 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
10792 | if (attr) |
10793 | { | |
10794 | /* The size of the anonymous object containing | |
10795 | the bit field is explicit, so use the | |
10796 | indicated size (in bytes). */ | |
10797 | anonymous_size = DW_UNSND (attr); | |
10798 | } | |
10799 | else | |
10800 | { | |
10801 | /* The size of the anonymous object containing | |
10802 | the bit field must be inferred from the type | |
10803 | attribute of the data member containing the | |
10804 | bit field. */ | |
10805 | anonymous_size = TYPE_LENGTH (fp->type); | |
10806 | } | |
f41f5e61 PA |
10807 | SET_FIELD_BITPOS (*fp, |
10808 | (FIELD_BITPOS (*fp) | |
10809 | + anonymous_size * bits_per_byte | |
10810 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
10811 | } |
10812 | } | |
10813 | ||
10814 | /* Get name of field. */ | |
39cbfefa DJ |
10815 | fieldname = dwarf2_name (die, cu); |
10816 | if (fieldname == NULL) | |
10817 | fieldname = ""; | |
d8151005 DJ |
10818 | |
10819 | /* The name is already allocated along with this objfile, so we don't | |
10820 | need to duplicate it for the type. */ | |
10821 | fp->name = fieldname; | |
c906108c SS |
10822 | |
10823 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 10824 | pointer or virtual base class pointer) to private. */ |
e142c38c | 10825 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 10826 | { |
d48cc9dd | 10827 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
10828 | new_field->accessibility = DW_ACCESS_private; |
10829 | fip->non_public_fields = 1; | |
10830 | } | |
10831 | } | |
a9a9bd0f | 10832 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 10833 | { |
a9a9bd0f DC |
10834 | /* C++ static member. */ |
10835 | ||
10836 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
10837 | is a declaration, but all versions of G++ as of this writing | |
10838 | (so through at least 3.2.1) incorrectly generate | |
10839 | DW_TAG_variable tags. */ | |
6e70227d | 10840 | |
ff355380 | 10841 | const char *physname; |
c906108c | 10842 | |
a9a9bd0f | 10843 | /* Get name of field. */ |
39cbfefa DJ |
10844 | fieldname = dwarf2_name (die, cu); |
10845 | if (fieldname == NULL) | |
c906108c SS |
10846 | return; |
10847 | ||
254e6b9e | 10848 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
10849 | if (attr |
10850 | /* Only create a symbol if this is an external value. | |
10851 | new_symbol checks this and puts the value in the global symbol | |
10852 | table, which we want. If it is not external, new_symbol | |
10853 | will try to put the value in cu->list_in_scope which is wrong. */ | |
10854 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
10855 | { |
10856 | /* A static const member, not much different than an enum as far as | |
10857 | we're concerned, except that we can support more types. */ | |
10858 | new_symbol (die, NULL, cu); | |
10859 | } | |
10860 | ||
2df3850c | 10861 | /* Get physical name. */ |
ff355380 | 10862 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 10863 | |
d8151005 DJ |
10864 | /* The name is already allocated along with this objfile, so we don't |
10865 | need to duplicate it for the type. */ | |
10866 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 10867 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 10868 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
10869 | } |
10870 | else if (die->tag == DW_TAG_inheritance) | |
10871 | { | |
74ac6d43 | 10872 | LONGEST offset; |
d4b96c9a | 10873 | |
74ac6d43 TT |
10874 | /* C++ base class field. */ |
10875 | if (handle_data_member_location (die, cu, &offset)) | |
10876 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 10877 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 10878 | FIELD_TYPE (*fp) = die_type (die, cu); |
c906108c SS |
10879 | FIELD_NAME (*fp) = type_name_no_tag (fp->type); |
10880 | fip->nbaseclasses++; | |
10881 | } | |
10882 | } | |
10883 | ||
98751a41 JK |
10884 | /* Add a typedef defined in the scope of the FIP's class. */ |
10885 | ||
10886 | static void | |
10887 | dwarf2_add_typedef (struct field_info *fip, struct die_info *die, | |
10888 | struct dwarf2_cu *cu) | |
6e70227d | 10889 | { |
98751a41 | 10890 | struct objfile *objfile = cu->objfile; |
98751a41 JK |
10891 | struct typedef_field_list *new_field; |
10892 | struct attribute *attr; | |
10893 | struct typedef_field *fp; | |
10894 | char *fieldname = ""; | |
10895 | ||
10896 | /* Allocate a new field list entry and link it in. */ | |
10897 | new_field = xzalloc (sizeof (*new_field)); | |
10898 | make_cleanup (xfree, new_field); | |
10899 | ||
10900 | gdb_assert (die->tag == DW_TAG_typedef); | |
10901 | ||
10902 | fp = &new_field->field; | |
10903 | ||
10904 | /* Get name of field. */ | |
10905 | fp->name = dwarf2_name (die, cu); | |
10906 | if (fp->name == NULL) | |
10907 | return; | |
10908 | ||
10909 | fp->type = read_type_die (die, cu); | |
10910 | ||
10911 | new_field->next = fip->typedef_field_list; | |
10912 | fip->typedef_field_list = new_field; | |
10913 | fip->typedef_field_list_count++; | |
10914 | } | |
10915 | ||
c906108c SS |
10916 | /* Create the vector of fields, and attach it to the type. */ |
10917 | ||
10918 | static void | |
fba45db2 | 10919 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 10920 | struct dwarf2_cu *cu) |
c906108c SS |
10921 | { |
10922 | int nfields = fip->nfields; | |
10923 | ||
10924 | /* Record the field count, allocate space for the array of fields, | |
10925 | and create blank accessibility bitfields if necessary. */ | |
10926 | TYPE_NFIELDS (type) = nfields; | |
10927 | TYPE_FIELDS (type) = (struct field *) | |
10928 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
10929 | memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); | |
10930 | ||
b4ba55a1 | 10931 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
10932 | { |
10933 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
10934 | ||
10935 | TYPE_FIELD_PRIVATE_BITS (type) = | |
10936 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10937 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
10938 | ||
10939 | TYPE_FIELD_PROTECTED_BITS (type) = | |
10940 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10941 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
10942 | ||
774b6a14 TT |
10943 | TYPE_FIELD_IGNORE_BITS (type) = |
10944 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
10945 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
10946 | } |
10947 | ||
10948 | /* If the type has baseclasses, allocate and clear a bit vector for | |
10949 | TYPE_FIELD_VIRTUAL_BITS. */ | |
b4ba55a1 | 10950 | if (fip->nbaseclasses && cu->language != language_ada) |
c906108c SS |
10951 | { |
10952 | int num_bytes = B_BYTES (fip->nbaseclasses); | |
fe1b8b76 | 10953 | unsigned char *pointer; |
c906108c SS |
10954 | |
10955 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
fe1b8b76 JB |
10956 | pointer = TYPE_ALLOC (type, num_bytes); |
10957 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; | |
c906108c SS |
10958 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->nbaseclasses); |
10959 | TYPE_N_BASECLASSES (type) = fip->nbaseclasses; | |
10960 | } | |
10961 | ||
3e43a32a MS |
10962 | /* Copy the saved-up fields into the field vector. Start from the head of |
10963 | the list, adding to the tail of the field array, so that they end up in | |
10964 | the same order in the array in which they were added to the list. */ | |
c906108c SS |
10965 | while (nfields-- > 0) |
10966 | { | |
7d0ccb61 DJ |
10967 | struct nextfield *fieldp; |
10968 | ||
10969 | if (fip->fields) | |
10970 | { | |
10971 | fieldp = fip->fields; | |
10972 | fip->fields = fieldp->next; | |
10973 | } | |
10974 | else | |
10975 | { | |
10976 | fieldp = fip->baseclasses; | |
10977 | fip->baseclasses = fieldp->next; | |
10978 | } | |
10979 | ||
10980 | TYPE_FIELD (type, nfields) = fieldp->field; | |
10981 | switch (fieldp->accessibility) | |
c906108c | 10982 | { |
c5aa993b | 10983 | case DW_ACCESS_private: |
b4ba55a1 JB |
10984 | if (cu->language != language_ada) |
10985 | SET_TYPE_FIELD_PRIVATE (type, nfields); | |
c5aa993b | 10986 | break; |
c906108c | 10987 | |
c5aa993b | 10988 | case DW_ACCESS_protected: |
b4ba55a1 JB |
10989 | if (cu->language != language_ada) |
10990 | SET_TYPE_FIELD_PROTECTED (type, nfields); | |
c5aa993b | 10991 | break; |
c906108c | 10992 | |
c5aa993b JM |
10993 | case DW_ACCESS_public: |
10994 | break; | |
c906108c | 10995 | |
c5aa993b JM |
10996 | default: |
10997 | /* Unknown accessibility. Complain and treat it as public. */ | |
10998 | { | |
e2e0b3e5 | 10999 | complaint (&symfile_complaints, _("unsupported accessibility %d"), |
7d0ccb61 | 11000 | fieldp->accessibility); |
c5aa993b JM |
11001 | } |
11002 | break; | |
c906108c SS |
11003 | } |
11004 | if (nfields < fip->nbaseclasses) | |
11005 | { | |
7d0ccb61 | 11006 | switch (fieldp->virtuality) |
c906108c | 11007 | { |
c5aa993b JM |
11008 | case DW_VIRTUALITY_virtual: |
11009 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 11010 | if (cu->language == language_ada) |
a73c6dcd | 11011 | error (_("unexpected virtuality in component of Ada type")); |
c5aa993b JM |
11012 | SET_TYPE_FIELD_VIRTUAL (type, nfields); |
11013 | break; | |
c906108c SS |
11014 | } |
11015 | } | |
c906108c SS |
11016 | } |
11017 | } | |
11018 | ||
7d27a96d TT |
11019 | /* Return true if this member function is a constructor, false |
11020 | otherwise. */ | |
11021 | ||
11022 | static int | |
11023 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
11024 | { | |
11025 | const char *fieldname; | |
11026 | const char *typename; | |
11027 | int len; | |
11028 | ||
11029 | if (die->parent == NULL) | |
11030 | return 0; | |
11031 | ||
11032 | if (die->parent->tag != DW_TAG_structure_type | |
11033 | && die->parent->tag != DW_TAG_union_type | |
11034 | && die->parent->tag != DW_TAG_class_type) | |
11035 | return 0; | |
11036 | ||
11037 | fieldname = dwarf2_name (die, cu); | |
11038 | typename = dwarf2_name (die->parent, cu); | |
11039 | if (fieldname == NULL || typename == NULL) | |
11040 | return 0; | |
11041 | ||
11042 | len = strlen (fieldname); | |
11043 | return (strncmp (fieldname, typename, len) == 0 | |
11044 | && (typename[len] == '\0' || typename[len] == '<')); | |
11045 | } | |
11046 | ||
c906108c SS |
11047 | /* Add a member function to the proper fieldlist. */ |
11048 | ||
11049 | static void | |
107d2387 | 11050 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 11051 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 11052 | { |
e7c27a73 | 11053 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11054 | struct attribute *attr; |
11055 | struct fnfieldlist *flp; | |
11056 | int i; | |
11057 | struct fn_field *fnp; | |
15d034d0 | 11058 | const char *fieldname; |
c906108c | 11059 | struct nextfnfield *new_fnfield; |
f792889a | 11060 | struct type *this_type; |
60d5a603 | 11061 | enum dwarf_access_attribute accessibility; |
c906108c | 11062 | |
b4ba55a1 | 11063 | if (cu->language == language_ada) |
a73c6dcd | 11064 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 11065 | |
2df3850c | 11066 | /* Get name of member function. */ |
39cbfefa DJ |
11067 | fieldname = dwarf2_name (die, cu); |
11068 | if (fieldname == NULL) | |
2df3850c | 11069 | return; |
c906108c | 11070 | |
c906108c SS |
11071 | /* Look up member function name in fieldlist. */ |
11072 | for (i = 0; i < fip->nfnfields; i++) | |
11073 | { | |
27bfe10e | 11074 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
c906108c SS |
11075 | break; |
11076 | } | |
11077 | ||
11078 | /* Create new list element if necessary. */ | |
11079 | if (i < fip->nfnfields) | |
11080 | flp = &fip->fnfieldlists[i]; | |
11081 | else | |
11082 | { | |
11083 | if ((fip->nfnfields % DW_FIELD_ALLOC_CHUNK) == 0) | |
11084 | { | |
11085 | fip->fnfieldlists = (struct fnfieldlist *) | |
11086 | xrealloc (fip->fnfieldlists, | |
11087 | (fip->nfnfields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 11088 | * sizeof (struct fnfieldlist)); |
c906108c | 11089 | if (fip->nfnfields == 0) |
c13c43fd | 11090 | make_cleanup (free_current_contents, &fip->fnfieldlists); |
c906108c SS |
11091 | } |
11092 | flp = &fip->fnfieldlists[fip->nfnfields]; | |
11093 | flp->name = fieldname; | |
11094 | flp->length = 0; | |
11095 | flp->head = NULL; | |
3da10d80 | 11096 | i = fip->nfnfields++; |
c906108c SS |
11097 | } |
11098 | ||
11099 | /* Create a new member function field and chain it to the field list | |
0963b4bd | 11100 | entry. */ |
c906108c | 11101 | new_fnfield = (struct nextfnfield *) xmalloc (sizeof (struct nextfnfield)); |
b8c9b27d | 11102 | make_cleanup (xfree, new_fnfield); |
c906108c SS |
11103 | memset (new_fnfield, 0, sizeof (struct nextfnfield)); |
11104 | new_fnfield->next = flp->head; | |
11105 | flp->head = new_fnfield; | |
11106 | flp->length++; | |
11107 | ||
11108 | /* Fill in the member function field info. */ | |
11109 | fnp = &new_fnfield->fnfield; | |
3da10d80 KS |
11110 | |
11111 | /* Delay processing of the physname until later. */ | |
11112 | if (cu->language == language_cplus || cu->language == language_java) | |
11113 | { | |
11114 | add_to_method_list (type, i, flp->length - 1, fieldname, | |
11115 | die, cu); | |
11116 | } | |
11117 | else | |
11118 | { | |
1d06ead6 | 11119 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
11120 | fnp->physname = physname ? physname : ""; |
11121 | } | |
11122 | ||
c906108c | 11123 | fnp->type = alloc_type (objfile); |
f792889a DJ |
11124 | this_type = read_type_die (die, cu); |
11125 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 11126 | { |
f792889a | 11127 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 11128 | |
f792889a | 11129 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
11130 | of the method itself (TYPE_CODE_METHOD). */ |
11131 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
11132 | TYPE_TARGET_TYPE (this_type), |
11133 | TYPE_FIELDS (this_type), | |
11134 | TYPE_NFIELDS (this_type), | |
11135 | TYPE_VARARGS (this_type)); | |
c906108c SS |
11136 | |
11137 | /* Handle static member functions. | |
c5aa993b | 11138 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
11139 | member functions. G++ helps GDB by marking the first |
11140 | parameter for non-static member functions (which is the this | |
11141 | pointer) as artificial. We obtain this information from | |
11142 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 11143 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
11144 | fnp->voffset = VOFFSET_STATIC; |
11145 | } | |
11146 | else | |
e2e0b3e5 | 11147 | complaint (&symfile_complaints, _("member function type missing for '%s'"), |
3da10d80 | 11148 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
11149 | |
11150 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 11151 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 11152 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 11153 | |
3e43a32a MS |
11154 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
11155 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
11156 | |
11157 | /* Get accessibility. */ | |
e142c38c | 11158 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
c906108c | 11159 | if (attr) |
60d5a603 JK |
11160 | accessibility = DW_UNSND (attr); |
11161 | else | |
11162 | accessibility = dwarf2_default_access_attribute (die, cu); | |
11163 | switch (accessibility) | |
c906108c | 11164 | { |
60d5a603 JK |
11165 | case DW_ACCESS_private: |
11166 | fnp->is_private = 1; | |
11167 | break; | |
11168 | case DW_ACCESS_protected: | |
11169 | fnp->is_protected = 1; | |
11170 | break; | |
c906108c SS |
11171 | } |
11172 | ||
b02dede2 | 11173 | /* Check for artificial methods. */ |
e142c38c | 11174 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
11175 | if (attr && DW_UNSND (attr) != 0) |
11176 | fnp->is_artificial = 1; | |
11177 | ||
7d27a96d TT |
11178 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
11179 | ||
0d564a31 | 11180 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
11181 | function. For older versions of GCC, this is an offset in the |
11182 | appropriate virtual table, as specified by DW_AT_containing_type. | |
11183 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
11184 | to the object address. */ |
11185 | ||
e142c38c | 11186 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
aec5aa8b | 11187 | if (attr) |
8e19ed76 | 11188 | { |
aec5aa8b | 11189 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 11190 | { |
aec5aa8b TT |
11191 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
11192 | { | |
11193 | /* Old-style GCC. */ | |
11194 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
11195 | } | |
11196 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
11197 | || (DW_BLOCK (attr)->size > 1 | |
11198 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
11199 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
11200 | { | |
11201 | struct dwarf_block blk; | |
11202 | int offset; | |
11203 | ||
11204 | offset = (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
11205 | ? 1 : 2); | |
11206 | blk.size = DW_BLOCK (attr)->size - offset; | |
11207 | blk.data = DW_BLOCK (attr)->data + offset; | |
11208 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); | |
11209 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
11210 | dwarf2_complex_location_expr_complaint (); | |
11211 | else | |
11212 | fnp->voffset /= cu->header.addr_size; | |
11213 | fnp->voffset += 2; | |
11214 | } | |
11215 | else | |
11216 | dwarf2_complex_location_expr_complaint (); | |
11217 | ||
11218 | if (!fnp->fcontext) | |
11219 | fnp->fcontext = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
11220 | } | |
3690dd37 | 11221 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 11222 | { |
4d3c2250 | 11223 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
11224 | } |
11225 | else | |
11226 | { | |
4d3c2250 KB |
11227 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
11228 | fieldname); | |
8e19ed76 | 11229 | } |
0d564a31 | 11230 | } |
d48cc9dd DJ |
11231 | else |
11232 | { | |
11233 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
11234 | if (attr && DW_UNSND (attr)) | |
11235 | { | |
11236 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
11237 | complaint (&symfile_complaints, | |
3e43a32a MS |
11238 | _("Member function \"%s\" (offset %d) is virtual " |
11239 | "but the vtable offset is not specified"), | |
b64f50a1 | 11240 | fieldname, die->offset.sect_off); |
9655fd1a | 11241 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
11242 | TYPE_CPLUS_DYNAMIC (type) = 1; |
11243 | } | |
11244 | } | |
c906108c SS |
11245 | } |
11246 | ||
11247 | /* Create the vector of member function fields, and attach it to the type. */ | |
11248 | ||
11249 | static void | |
fba45db2 | 11250 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 11251 | struct dwarf2_cu *cu) |
c906108c SS |
11252 | { |
11253 | struct fnfieldlist *flp; | |
c906108c SS |
11254 | int i; |
11255 | ||
b4ba55a1 | 11256 | if (cu->language == language_ada) |
a73c6dcd | 11257 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 11258 | |
c906108c SS |
11259 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
11260 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
11261 | TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * fip->nfnfields); | |
11262 | ||
11263 | for (i = 0, flp = fip->fnfieldlists; i < fip->nfnfields; i++, flp++) | |
11264 | { | |
11265 | struct nextfnfield *nfp = flp->head; | |
11266 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); | |
11267 | int k; | |
11268 | ||
11269 | TYPE_FN_FIELDLIST_NAME (type, i) = flp->name; | |
11270 | TYPE_FN_FIELDLIST_LENGTH (type, i) = flp->length; | |
11271 | fn_flp->fn_fields = (struct fn_field *) | |
11272 | TYPE_ALLOC (type, sizeof (struct fn_field) * flp->length); | |
11273 | for (k = flp->length; (k--, nfp); nfp = nfp->next) | |
c5aa993b | 11274 | fn_flp->fn_fields[k] = nfp->fnfield; |
c906108c SS |
11275 | } |
11276 | ||
11277 | TYPE_NFN_FIELDS (type) = fip->nfnfields; | |
c906108c SS |
11278 | } |
11279 | ||
1168df01 JB |
11280 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
11281 | language, zero otherwise. */ | |
11282 | static int | |
11283 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
11284 | { | |
11285 | static const char vptr[] = "_vptr"; | |
987504bb | 11286 | static const char vtable[] = "vtable"; |
1168df01 | 11287 | |
987504bb JJ |
11288 | /* Look for the C++ and Java forms of the vtable. */ |
11289 | if ((cu->language == language_java | |
11290 | && strncmp (name, vtable, sizeof (vtable) - 1) == 0) | |
11291 | || (strncmp (name, vptr, sizeof (vptr) - 1) == 0 | |
11292 | && is_cplus_marker (name[sizeof (vptr) - 1]))) | |
1168df01 JB |
11293 | return 1; |
11294 | ||
11295 | return 0; | |
11296 | } | |
11297 | ||
c0dd20ea | 11298 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
11299 | functions, with the ABI-specified layout. If TYPE describes |
11300 | such a structure, smash it into a member function type. | |
61049d3b DJ |
11301 | |
11302 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
11303 | This is GCC PR debug/28767. */ | |
c0dd20ea | 11304 | |
0b92b5bb TT |
11305 | static void |
11306 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 11307 | { |
0b92b5bb | 11308 | struct type *pfn_type, *domain_type, *new_type; |
c0dd20ea DJ |
11309 | |
11310 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
11311 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
11312 | return; | |
c0dd20ea DJ |
11313 | |
11314 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
11315 | if (TYPE_FIELD_NAME (type, 0) == NULL |
11316 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
11317 | || TYPE_FIELD_NAME (type, 1) == NULL | |
11318 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
11319 | return; | |
c0dd20ea DJ |
11320 | |
11321 | /* Find the type of the method. */ | |
0b92b5bb | 11322 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
11323 | if (pfn_type == NULL |
11324 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
11325 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 11326 | return; |
c0dd20ea DJ |
11327 | |
11328 | /* Look for the "this" argument. */ | |
11329 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
11330 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 11331 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 11332 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 11333 | return; |
c0dd20ea DJ |
11334 | |
11335 | domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); | |
0b92b5bb TT |
11336 | new_type = alloc_type (objfile); |
11337 | smash_to_method_type (new_type, domain_type, TYPE_TARGET_TYPE (pfn_type), | |
c0dd20ea DJ |
11338 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
11339 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 11340 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 11341 | } |
1168df01 | 11342 | |
685b1105 JK |
11343 | /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler |
11344 | (icc). */ | |
11345 | ||
11346 | static int | |
11347 | producer_is_icc (struct dwarf2_cu *cu) | |
11348 | { | |
11349 | if (!cu->checked_producer) | |
11350 | check_producer (cu); | |
11351 | ||
11352 | return cu->producer_is_icc; | |
11353 | } | |
11354 | ||
c906108c | 11355 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
11356 | (definition) to create a type for the structure or union. Fill in |
11357 | the type's name and general properties; the members will not be | |
3d1d5ea3 | 11358 | processed until process_structure_scope. |
c906108c | 11359 | |
c767944b DJ |
11360 | NOTE: we need to call these functions regardless of whether or not the |
11361 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c SS |
11362 | structure or union. This gets the type entered into our set of |
11363 | user defined types. | |
11364 | ||
11365 | However, if the structure is incomplete (an opaque struct/union) | |
11366 | then suppress creating a symbol table entry for it since gdb only | |
11367 | wants to find the one with the complete definition. Note that if | |
11368 | it is complete, we just call new_symbol, which does it's own | |
11369 | checking about whether the struct/union is anonymous or not (and | |
11370 | suppresses creating a symbol table entry itself). */ | |
11371 | ||
f792889a | 11372 | static struct type * |
134d01f1 | 11373 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11374 | { |
e7c27a73 | 11375 | struct objfile *objfile = cu->objfile; |
c906108c SS |
11376 | struct type *type; |
11377 | struct attribute *attr; | |
15d034d0 | 11378 | const char *name; |
c906108c | 11379 | |
348e048f DE |
11380 | /* If the definition of this type lives in .debug_types, read that type. |
11381 | Don't follow DW_AT_specification though, that will take us back up | |
11382 | the chain and we want to go down. */ | |
45e58e77 | 11383 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11384 | if (attr) |
11385 | { | |
ac9ec31b | 11386 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 11387 | |
ac9ec31b | 11388 | /* The type's CU may not be the same as CU. |
02142a6c | 11389 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
11390 | return set_die_type (die, type, cu); |
11391 | } | |
11392 | ||
c0dd20ea | 11393 | type = alloc_type (objfile); |
c906108c | 11394 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 11395 | |
39cbfefa DJ |
11396 | name = dwarf2_name (die, cu); |
11397 | if (name != NULL) | |
c906108c | 11398 | { |
987504bb JJ |
11399 | if (cu->language == language_cplus |
11400 | || cu->language == language_java) | |
63d06c5c | 11401 | { |
15d034d0 | 11402 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
11403 | |
11404 | /* dwarf2_full_name might have already finished building the DIE's | |
11405 | type. If so, there is no need to continue. */ | |
11406 | if (get_die_type (die, cu) != NULL) | |
11407 | return get_die_type (die, cu); | |
11408 | ||
11409 | TYPE_TAG_NAME (type) = full_name; | |
94af9270 KS |
11410 | if (die->tag == DW_TAG_structure_type |
11411 | || die->tag == DW_TAG_class_type) | |
11412 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c DC |
11413 | } |
11414 | else | |
11415 | { | |
d8151005 DJ |
11416 | /* The name is already allocated along with this objfile, so |
11417 | we don't need to duplicate it for the type. */ | |
7d455152 | 11418 | TYPE_TAG_NAME (type) = name; |
94af9270 KS |
11419 | if (die->tag == DW_TAG_class_type) |
11420 | TYPE_NAME (type) = TYPE_TAG_NAME (type); | |
63d06c5c | 11421 | } |
c906108c SS |
11422 | } |
11423 | ||
11424 | if (die->tag == DW_TAG_structure_type) | |
11425 | { | |
11426 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
11427 | } | |
11428 | else if (die->tag == DW_TAG_union_type) | |
11429 | { | |
11430 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
11431 | } | |
11432 | else | |
11433 | { | |
c906108c SS |
11434 | TYPE_CODE (type) = TYPE_CODE_CLASS; |
11435 | } | |
11436 | ||
0cc2414c TT |
11437 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
11438 | TYPE_DECLARED_CLASS (type) = 1; | |
11439 | ||
e142c38c | 11440 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11441 | if (attr) |
11442 | { | |
11443 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11444 | } | |
11445 | else | |
11446 | { | |
11447 | TYPE_LENGTH (type) = 0; | |
11448 | } | |
11449 | ||
685b1105 JK |
11450 | if (producer_is_icc (cu)) |
11451 | { | |
11452 | /* ICC does not output the required DW_AT_declaration | |
11453 | on incomplete types, but gives them a size of zero. */ | |
11454 | } | |
11455 | else | |
11456 | TYPE_STUB_SUPPORTED (type) = 1; | |
11457 | ||
dc718098 | 11458 | if (die_is_declaration (die, cu)) |
876cecd0 | 11459 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
11460 | else if (attr == NULL && die->child == NULL |
11461 | && producer_is_realview (cu->producer)) | |
11462 | /* RealView does not output the required DW_AT_declaration | |
11463 | on incomplete types. */ | |
11464 | TYPE_STUB (type) = 1; | |
dc718098 | 11465 | |
c906108c SS |
11466 | /* We need to add the type field to the die immediately so we don't |
11467 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 11468 | type within the structure itself. */ |
1c379e20 | 11469 | set_die_type (die, type, cu); |
c906108c | 11470 | |
7e314c57 JK |
11471 | /* set_die_type should be already done. */ |
11472 | set_descriptive_type (type, die, cu); | |
11473 | ||
c767944b DJ |
11474 | return type; |
11475 | } | |
11476 | ||
11477 | /* Finish creating a structure or union type, including filling in | |
11478 | its members and creating a symbol for it. */ | |
11479 | ||
11480 | static void | |
11481 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11482 | { | |
11483 | struct objfile *objfile = cu->objfile; | |
11484 | struct die_info *child_die = die->child; | |
11485 | struct type *type; | |
11486 | ||
11487 | type = get_die_type (die, cu); | |
11488 | if (type == NULL) | |
11489 | type = read_structure_type (die, cu); | |
11490 | ||
e142c38c | 11491 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
11492 | { |
11493 | struct field_info fi; | |
11494 | struct die_info *child_die; | |
34eaf542 | 11495 | VEC (symbolp) *template_args = NULL; |
c767944b | 11496 | struct cleanup *back_to = make_cleanup (null_cleanup, 0); |
c906108c SS |
11497 | |
11498 | memset (&fi, 0, sizeof (struct field_info)); | |
11499 | ||
639d11d3 | 11500 | child_die = die->child; |
c906108c SS |
11501 | |
11502 | while (child_die && child_die->tag) | |
11503 | { | |
a9a9bd0f DC |
11504 | if (child_die->tag == DW_TAG_member |
11505 | || child_die->tag == DW_TAG_variable) | |
c906108c | 11506 | { |
a9a9bd0f DC |
11507 | /* NOTE: carlton/2002-11-05: A C++ static data member |
11508 | should be a DW_TAG_member that is a declaration, but | |
11509 | all versions of G++ as of this writing (so through at | |
11510 | least 3.2.1) incorrectly generate DW_TAG_variable | |
11511 | tags for them instead. */ | |
e7c27a73 | 11512 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11513 | } |
8713b1b1 | 11514 | else if (child_die->tag == DW_TAG_subprogram) |
c906108c | 11515 | { |
0963b4bd | 11516 | /* C++ member function. */ |
e7c27a73 | 11517 | dwarf2_add_member_fn (&fi, child_die, type, cu); |
c906108c SS |
11518 | } |
11519 | else if (child_die->tag == DW_TAG_inheritance) | |
11520 | { | |
11521 | /* C++ base class field. */ | |
e7c27a73 | 11522 | dwarf2_add_field (&fi, child_die, cu); |
c906108c | 11523 | } |
98751a41 JK |
11524 | else if (child_die->tag == DW_TAG_typedef) |
11525 | dwarf2_add_typedef (&fi, child_die, cu); | |
34eaf542 TT |
11526 | else if (child_die->tag == DW_TAG_template_type_param |
11527 | || child_die->tag == DW_TAG_template_value_param) | |
11528 | { | |
11529 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
11530 | ||
f1078f66 DJ |
11531 | if (arg != NULL) |
11532 | VEC_safe_push (symbolp, template_args, arg); | |
34eaf542 TT |
11533 | } |
11534 | ||
c906108c SS |
11535 | child_die = sibling_die (child_die); |
11536 | } | |
11537 | ||
34eaf542 TT |
11538 | /* Attach template arguments to type. */ |
11539 | if (! VEC_empty (symbolp, template_args)) | |
11540 | { | |
11541 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
11542 | TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11543 | = VEC_length (symbolp, template_args); | |
11544 | TYPE_TEMPLATE_ARGUMENTS (type) | |
11545 | = obstack_alloc (&objfile->objfile_obstack, | |
11546 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11547 | * sizeof (struct symbol *))); | |
11548 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), | |
11549 | VEC_address (symbolp, template_args), | |
11550 | (TYPE_N_TEMPLATE_ARGUMENTS (type) | |
11551 | * sizeof (struct symbol *))); | |
11552 | VEC_free (symbolp, template_args); | |
11553 | } | |
11554 | ||
c906108c SS |
11555 | /* Attach fields and member functions to the type. */ |
11556 | if (fi.nfields) | |
e7c27a73 | 11557 | dwarf2_attach_fields_to_type (&fi, type, cu); |
c906108c SS |
11558 | if (fi.nfnfields) |
11559 | { | |
e7c27a73 | 11560 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 11561 | |
c5aa993b | 11562 | /* Get the type which refers to the base class (possibly this |
c906108c | 11563 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
11564 | class from the DW_AT_containing_type attribute. This use of |
11565 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 11566 | |
e142c38c | 11567 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 11568 | { |
e7c27a73 | 11569 | struct type *t = die_containing_type (die, cu); |
c906108c SS |
11570 | |
11571 | TYPE_VPTR_BASETYPE (type) = t; | |
11572 | if (type == t) | |
11573 | { | |
c906108c SS |
11574 | int i; |
11575 | ||
11576 | /* Our own class provides vtbl ptr. */ | |
11577 | for (i = TYPE_NFIELDS (t) - 1; | |
11578 | i >= TYPE_N_BASECLASSES (t); | |
11579 | --i) | |
11580 | { | |
0d5cff50 | 11581 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 11582 | |
1168df01 | 11583 | if (is_vtable_name (fieldname, cu)) |
c906108c SS |
11584 | { |
11585 | TYPE_VPTR_FIELDNO (type) = i; | |
11586 | break; | |
11587 | } | |
11588 | } | |
11589 | ||
11590 | /* Complain if virtual function table field not found. */ | |
11591 | if (i < TYPE_N_BASECLASSES (t)) | |
4d3c2250 | 11592 | complaint (&symfile_complaints, |
3e43a32a MS |
11593 | _("virtual function table pointer " |
11594 | "not found when defining class '%s'"), | |
4d3c2250 KB |
11595 | TYPE_TAG_NAME (type) ? TYPE_TAG_NAME (type) : |
11596 | ""); | |
c906108c SS |
11597 | } |
11598 | else | |
11599 | { | |
11600 | TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); | |
11601 | } | |
11602 | } | |
f6235d4c EZ |
11603 | else if (cu->producer |
11604 | && strncmp (cu->producer, | |
11605 | "IBM(R) XL C/C++ Advanced Edition", 32) == 0) | |
11606 | { | |
11607 | /* The IBM XLC compiler does not provide direct indication | |
11608 | of the containing type, but the vtable pointer is | |
11609 | always named __vfp. */ | |
11610 | ||
11611 | int i; | |
11612 | ||
11613 | for (i = TYPE_NFIELDS (type) - 1; | |
11614 | i >= TYPE_N_BASECLASSES (type); | |
11615 | --i) | |
11616 | { | |
11617 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
11618 | { | |
11619 | TYPE_VPTR_FIELDNO (type) = i; | |
11620 | TYPE_VPTR_BASETYPE (type) = type; | |
11621 | break; | |
11622 | } | |
11623 | } | |
11624 | } | |
c906108c | 11625 | } |
98751a41 JK |
11626 | |
11627 | /* Copy fi.typedef_field_list linked list elements content into the | |
11628 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
11629 | if (fi.typedef_field_list) | |
11630 | { | |
11631 | int i = fi.typedef_field_list_count; | |
11632 | ||
a0d7a4ff | 11633 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 JK |
11634 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
11635 | = TYPE_ALLOC (type, sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * i); | |
11636 | TYPE_TYPEDEF_FIELD_COUNT (type) = i; | |
11637 | ||
11638 | /* Reverse the list order to keep the debug info elements order. */ | |
11639 | while (--i >= 0) | |
11640 | { | |
11641 | struct typedef_field *dest, *src; | |
6e70227d | 11642 | |
98751a41 JK |
11643 | dest = &TYPE_TYPEDEF_FIELD (type, i); |
11644 | src = &fi.typedef_field_list->field; | |
11645 | fi.typedef_field_list = fi.typedef_field_list->next; | |
11646 | *dest = *src; | |
11647 | } | |
11648 | } | |
c767944b DJ |
11649 | |
11650 | do_cleanups (back_to); | |
eb2a6f42 TT |
11651 | |
11652 | if (HAVE_CPLUS_STRUCT (type)) | |
11653 | TYPE_CPLUS_REALLY_JAVA (type) = cu->language == language_java; | |
c906108c | 11654 | } |
63d06c5c | 11655 | |
bb5ed363 | 11656 | quirk_gcc_member_function_pointer (type, objfile); |
0b92b5bb | 11657 | |
90aeadfc DC |
11658 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
11659 | snapshots) has been known to create a die giving a declaration | |
11660 | for a class that has, as a child, a die giving a definition for a | |
11661 | nested class. So we have to process our children even if the | |
11662 | current die is a declaration. Normally, of course, a declaration | |
11663 | won't have any children at all. */ | |
134d01f1 | 11664 | |
90aeadfc DC |
11665 | while (child_die != NULL && child_die->tag) |
11666 | { | |
11667 | if (child_die->tag == DW_TAG_member | |
11668 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
11669 | || child_die->tag == DW_TAG_inheritance |
11670 | || child_die->tag == DW_TAG_template_value_param | |
11671 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 11672 | { |
90aeadfc | 11673 | /* Do nothing. */ |
134d01f1 | 11674 | } |
90aeadfc DC |
11675 | else |
11676 | process_die (child_die, cu); | |
134d01f1 | 11677 | |
90aeadfc | 11678 | child_die = sibling_die (child_die); |
134d01f1 DJ |
11679 | } |
11680 | ||
fa4028e9 JB |
11681 | /* Do not consider external references. According to the DWARF standard, |
11682 | these DIEs are identified by the fact that they have no byte_size | |
11683 | attribute, and a declaration attribute. */ | |
11684 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
11685 | || !die_is_declaration (die, cu)) | |
c767944b | 11686 | new_symbol (die, type, cu); |
134d01f1 DJ |
11687 | } |
11688 | ||
11689 | /* Given a DW_AT_enumeration_type die, set its type. We do not | |
11690 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 11691 | |
f792889a | 11692 | static struct type * |
134d01f1 | 11693 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11694 | { |
e7c27a73 | 11695 | struct objfile *objfile = cu->objfile; |
c906108c | 11696 | struct type *type; |
c906108c | 11697 | struct attribute *attr; |
0114d602 | 11698 | const char *name; |
134d01f1 | 11699 | |
348e048f DE |
11700 | /* If the definition of this type lives in .debug_types, read that type. |
11701 | Don't follow DW_AT_specification though, that will take us back up | |
11702 | the chain and we want to go down. */ | |
45e58e77 | 11703 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
348e048f DE |
11704 | if (attr) |
11705 | { | |
ac9ec31b | 11706 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 11707 | |
ac9ec31b | 11708 | /* The type's CU may not be the same as CU. |
02142a6c | 11709 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
11710 | return set_die_type (die, type, cu); |
11711 | } | |
11712 | ||
c906108c SS |
11713 | type = alloc_type (objfile); |
11714 | ||
11715 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 11716 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 11717 | if (name != NULL) |
7d455152 | 11718 | TYPE_TAG_NAME (type) = name; |
c906108c | 11719 | |
e142c38c | 11720 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
11721 | if (attr) |
11722 | { | |
11723 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11724 | } | |
11725 | else | |
11726 | { | |
11727 | TYPE_LENGTH (type) = 0; | |
11728 | } | |
11729 | ||
137033e9 JB |
11730 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
11731 | declared as private in the package spec, and then defined only | |
11732 | inside the package body. Such types are known as Taft Amendment | |
11733 | Types. When another package uses such a type, an incomplete DIE | |
11734 | may be generated by the compiler. */ | |
02eb380e | 11735 | if (die_is_declaration (die, cu)) |
876cecd0 | 11736 | TYPE_STUB (type) = 1; |
02eb380e | 11737 | |
f792889a | 11738 | return set_die_type (die, type, cu); |
134d01f1 DJ |
11739 | } |
11740 | ||
11741 | /* Given a pointer to a die which begins an enumeration, process all | |
11742 | the dies that define the members of the enumeration, and create the | |
11743 | symbol for the enumeration type. | |
11744 | ||
11745 | NOTE: We reverse the order of the element list. */ | |
11746 | ||
11747 | static void | |
11748 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11749 | { | |
f792889a | 11750 | struct type *this_type; |
134d01f1 | 11751 | |
f792889a DJ |
11752 | this_type = get_die_type (die, cu); |
11753 | if (this_type == NULL) | |
11754 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 11755 | |
639d11d3 | 11756 | if (die->child != NULL) |
c906108c | 11757 | { |
9dc481d3 DE |
11758 | struct die_info *child_die; |
11759 | struct symbol *sym; | |
11760 | struct field *fields = NULL; | |
11761 | int num_fields = 0; | |
11762 | int unsigned_enum = 1; | |
15d034d0 | 11763 | const char *name; |
cafec441 TT |
11764 | int flag_enum = 1; |
11765 | ULONGEST mask = 0; | |
9dc481d3 | 11766 | |
639d11d3 | 11767 | child_die = die->child; |
c906108c SS |
11768 | while (child_die && child_die->tag) |
11769 | { | |
11770 | if (child_die->tag != DW_TAG_enumerator) | |
11771 | { | |
e7c27a73 | 11772 | process_die (child_die, cu); |
c906108c SS |
11773 | } |
11774 | else | |
11775 | { | |
39cbfefa DJ |
11776 | name = dwarf2_name (child_die, cu); |
11777 | if (name) | |
c906108c | 11778 | { |
f792889a | 11779 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 11780 | if (SYMBOL_VALUE (sym) < 0) |
cafec441 TT |
11781 | { |
11782 | unsigned_enum = 0; | |
11783 | flag_enum = 0; | |
11784 | } | |
11785 | else if ((mask & SYMBOL_VALUE (sym)) != 0) | |
11786 | flag_enum = 0; | |
11787 | else | |
11788 | mask |= SYMBOL_VALUE (sym); | |
c906108c SS |
11789 | |
11790 | if ((num_fields % DW_FIELD_ALLOC_CHUNK) == 0) | |
11791 | { | |
11792 | fields = (struct field *) | |
11793 | xrealloc (fields, | |
11794 | (num_fields + DW_FIELD_ALLOC_CHUNK) | |
c5aa993b | 11795 | * sizeof (struct field)); |
c906108c SS |
11796 | } |
11797 | ||
3567439c | 11798 | FIELD_NAME (fields[num_fields]) = SYMBOL_LINKAGE_NAME (sym); |
c906108c | 11799 | FIELD_TYPE (fields[num_fields]) = NULL; |
14e75d8e | 11800 | SET_FIELD_ENUMVAL (fields[num_fields], SYMBOL_VALUE (sym)); |
c906108c SS |
11801 | FIELD_BITSIZE (fields[num_fields]) = 0; |
11802 | ||
11803 | num_fields++; | |
11804 | } | |
11805 | } | |
11806 | ||
11807 | child_die = sibling_die (child_die); | |
11808 | } | |
11809 | ||
11810 | if (num_fields) | |
11811 | { | |
f792889a DJ |
11812 | TYPE_NFIELDS (this_type) = num_fields; |
11813 | TYPE_FIELDS (this_type) = (struct field *) | |
11814 | TYPE_ALLOC (this_type, sizeof (struct field) * num_fields); | |
11815 | memcpy (TYPE_FIELDS (this_type), fields, | |
c906108c | 11816 | sizeof (struct field) * num_fields); |
b8c9b27d | 11817 | xfree (fields); |
c906108c SS |
11818 | } |
11819 | if (unsigned_enum) | |
876cecd0 | 11820 | TYPE_UNSIGNED (this_type) = 1; |
cafec441 TT |
11821 | if (flag_enum) |
11822 | TYPE_FLAG_ENUM (this_type) = 1; | |
c906108c | 11823 | } |
134d01f1 | 11824 | |
6c83ed52 TT |
11825 | /* If we are reading an enum from a .debug_types unit, and the enum |
11826 | is a declaration, and the enum is not the signatured type in the | |
11827 | unit, then we do not want to add a symbol for it. Adding a | |
11828 | symbol would in some cases obscure the true definition of the | |
11829 | enum, giving users an incomplete type when the definition is | |
11830 | actually available. Note that we do not want to do this for all | |
11831 | enums which are just declarations, because C++0x allows forward | |
11832 | enum declarations. */ | |
3019eac3 | 11833 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
11834 | && die_is_declaration (die, cu)) |
11835 | { | |
52dc124a | 11836 | struct signatured_type *sig_type; |
6c83ed52 | 11837 | |
c0f78cd4 | 11838 | sig_type = (struct signatured_type *) cu->per_cu; |
3019eac3 DE |
11839 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
11840 | if (sig_type->type_offset_in_section.sect_off != die->offset.sect_off) | |
6c83ed52 TT |
11841 | return; |
11842 | } | |
11843 | ||
f792889a | 11844 | new_symbol (die, this_type, cu); |
c906108c SS |
11845 | } |
11846 | ||
11847 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
11848 | the DIE's type field. For now, this only handles one dimensional | |
11849 | arrays. */ | |
11850 | ||
f792889a | 11851 | static struct type * |
e7c27a73 | 11852 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11853 | { |
e7c27a73 | 11854 | struct objfile *objfile = cu->objfile; |
c906108c | 11855 | struct die_info *child_die; |
7e314c57 | 11856 | struct type *type; |
c906108c SS |
11857 | struct type *element_type, *range_type, *index_type; |
11858 | struct type **range_types = NULL; | |
11859 | struct attribute *attr; | |
11860 | int ndim = 0; | |
11861 | struct cleanup *back_to; | |
15d034d0 | 11862 | const char *name; |
c906108c | 11863 | |
e7c27a73 | 11864 | element_type = die_type (die, cu); |
c906108c | 11865 | |
7e314c57 JK |
11866 | /* The die_type call above may have already set the type for this DIE. */ |
11867 | type = get_die_type (die, cu); | |
11868 | if (type) | |
11869 | return type; | |
11870 | ||
c906108c SS |
11871 | /* Irix 6.2 native cc creates array types without children for |
11872 | arrays with unspecified length. */ | |
639d11d3 | 11873 | if (die->child == NULL) |
c906108c | 11874 | { |
46bf5051 | 11875 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 11876 | range_type = create_range_type (NULL, index_type, 0, -1); |
f792889a DJ |
11877 | type = create_array_type (NULL, element_type, range_type); |
11878 | return set_die_type (die, type, cu); | |
c906108c SS |
11879 | } |
11880 | ||
11881 | back_to = make_cleanup (null_cleanup, NULL); | |
639d11d3 | 11882 | child_die = die->child; |
c906108c SS |
11883 | while (child_die && child_die->tag) |
11884 | { | |
11885 | if (child_die->tag == DW_TAG_subrange_type) | |
11886 | { | |
f792889a | 11887 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 11888 | |
f792889a | 11889 | if (child_type != NULL) |
a02abb62 | 11890 | { |
0963b4bd MS |
11891 | /* The range type was succesfully read. Save it for the |
11892 | array type creation. */ | |
a02abb62 JB |
11893 | if ((ndim % DW_FIELD_ALLOC_CHUNK) == 0) |
11894 | { | |
11895 | range_types = (struct type **) | |
11896 | xrealloc (range_types, (ndim + DW_FIELD_ALLOC_CHUNK) | |
11897 | * sizeof (struct type *)); | |
11898 | if (ndim == 0) | |
11899 | make_cleanup (free_current_contents, &range_types); | |
11900 | } | |
f792889a | 11901 | range_types[ndim++] = child_type; |
a02abb62 | 11902 | } |
c906108c SS |
11903 | } |
11904 | child_die = sibling_die (child_die); | |
11905 | } | |
11906 | ||
11907 | /* Dwarf2 dimensions are output from left to right, create the | |
11908 | necessary array types in backwards order. */ | |
7ca2d3a3 | 11909 | |
c906108c | 11910 | type = element_type; |
7ca2d3a3 DL |
11911 | |
11912 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
11913 | { | |
11914 | int i = 0; | |
9a619af0 | 11915 | |
7ca2d3a3 DL |
11916 | while (i < ndim) |
11917 | type = create_array_type (NULL, type, range_types[i++]); | |
11918 | } | |
11919 | else | |
11920 | { | |
11921 | while (ndim-- > 0) | |
11922 | type = create_array_type (NULL, type, range_types[ndim]); | |
11923 | } | |
c906108c | 11924 | |
f5f8a009 EZ |
11925 | /* Understand Dwarf2 support for vector types (like they occur on |
11926 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
11927 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
11928 | custom vendor extension. The main difference between a regular | |
11929 | array and the vector variant is that vectors are passed by value | |
11930 | to functions. */ | |
e142c38c | 11931 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
f5f8a009 | 11932 | if (attr) |
ea37ba09 | 11933 | make_vector_type (type); |
f5f8a009 | 11934 | |
dbc98a8b KW |
11935 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
11936 | implementation may choose to implement triple vectors using this | |
11937 | attribute. */ | |
11938 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
11939 | if (attr) | |
11940 | { | |
11941 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
11942 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
11943 | else | |
3e43a32a MS |
11944 | complaint (&symfile_complaints, |
11945 | _("DW_AT_byte_size for array type smaller " | |
11946 | "than the total size of elements")); | |
dbc98a8b KW |
11947 | } |
11948 | ||
39cbfefa DJ |
11949 | name = dwarf2_name (die, cu); |
11950 | if (name) | |
11951 | TYPE_NAME (type) = name; | |
6e70227d | 11952 | |
0963b4bd | 11953 | /* Install the type in the die. */ |
7e314c57 JK |
11954 | set_die_type (die, type, cu); |
11955 | ||
11956 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
11957 | set_descriptive_type (type, die, cu); |
11958 | ||
c906108c SS |
11959 | do_cleanups (back_to); |
11960 | ||
7e314c57 | 11961 | return type; |
c906108c SS |
11962 | } |
11963 | ||
7ca2d3a3 | 11964 | static enum dwarf_array_dim_ordering |
6e70227d | 11965 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
11966 | { |
11967 | struct attribute *attr; | |
11968 | ||
11969 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
11970 | ||
11971 | if (attr) return DW_SND (attr); | |
11972 | ||
0963b4bd MS |
11973 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
11974 | opposite order to the dwarf2 specification, but data is still | |
11975 | laid out as per normal fortran. | |
7ca2d3a3 | 11976 | |
0963b4bd MS |
11977 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
11978 | version checking. */ | |
7ca2d3a3 | 11979 | |
905e0470 PM |
11980 | if (cu->language == language_fortran |
11981 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
11982 | { |
11983 | return DW_ORD_row_major; | |
11984 | } | |
11985 | ||
6e70227d | 11986 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
11987 | { |
11988 | case array_column_major: | |
11989 | return DW_ORD_col_major; | |
11990 | case array_row_major: | |
11991 | default: | |
11992 | return DW_ORD_row_major; | |
11993 | }; | |
11994 | } | |
11995 | ||
72019c9c | 11996 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 11997 | the DIE's type field. */ |
72019c9c | 11998 | |
f792889a | 11999 | static struct type * |
72019c9c GM |
12000 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
12001 | { | |
7e314c57 JK |
12002 | struct type *domain_type, *set_type; |
12003 | struct attribute *attr; | |
f792889a | 12004 | |
7e314c57 JK |
12005 | domain_type = die_type (die, cu); |
12006 | ||
12007 | /* The die_type call above may have already set the type for this DIE. */ | |
12008 | set_type = get_die_type (die, cu); | |
12009 | if (set_type) | |
12010 | return set_type; | |
12011 | ||
12012 | set_type = create_set_type (NULL, domain_type); | |
12013 | ||
12014 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
d09039dd PM |
12015 | if (attr) |
12016 | TYPE_LENGTH (set_type) = DW_UNSND (attr); | |
7e314c57 | 12017 | |
f792889a | 12018 | return set_die_type (die, set_type, cu); |
72019c9c | 12019 | } |
7ca2d3a3 | 12020 | |
0971de02 TT |
12021 | /* A helper for read_common_block that creates a locexpr baton. |
12022 | SYM is the symbol which we are marking as computed. | |
12023 | COMMON_DIE is the DIE for the common block. | |
12024 | COMMON_LOC is the location expression attribute for the common | |
12025 | block itself. | |
12026 | MEMBER_LOC is the location expression attribute for the particular | |
12027 | member of the common block that we are processing. | |
12028 | CU is the CU from which the above come. */ | |
12029 | ||
12030 | static void | |
12031 | mark_common_block_symbol_computed (struct symbol *sym, | |
12032 | struct die_info *common_die, | |
12033 | struct attribute *common_loc, | |
12034 | struct attribute *member_loc, | |
12035 | struct dwarf2_cu *cu) | |
12036 | { | |
12037 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12038 | struct dwarf2_locexpr_baton *baton; | |
12039 | gdb_byte *ptr; | |
12040 | unsigned int cu_off; | |
12041 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
12042 | LONGEST offset = 0; | |
12043 | ||
12044 | gdb_assert (common_loc && member_loc); | |
12045 | gdb_assert (attr_form_is_block (common_loc)); | |
12046 | gdb_assert (attr_form_is_block (member_loc) | |
12047 | || attr_form_is_constant (member_loc)); | |
12048 | ||
12049 | baton = obstack_alloc (&objfile->objfile_obstack, | |
12050 | sizeof (struct dwarf2_locexpr_baton)); | |
12051 | baton->per_cu = cu->per_cu; | |
12052 | gdb_assert (baton->per_cu); | |
12053 | ||
12054 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
12055 | ||
12056 | if (attr_form_is_constant (member_loc)) | |
12057 | { | |
12058 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
12059 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
12060 | } | |
12061 | else | |
12062 | baton->size += DW_BLOCK (member_loc)->size; | |
12063 | ||
12064 | ptr = obstack_alloc (&objfile->objfile_obstack, baton->size); | |
12065 | baton->data = ptr; | |
12066 | ||
12067 | *ptr++ = DW_OP_call4; | |
12068 | cu_off = common_die->offset.sect_off - cu->per_cu->offset.sect_off; | |
12069 | store_unsigned_integer (ptr, 4, byte_order, cu_off); | |
12070 | ptr += 4; | |
12071 | ||
12072 | if (attr_form_is_constant (member_loc)) | |
12073 | { | |
12074 | *ptr++ = DW_OP_addr; | |
12075 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
12076 | ptr += cu->header.addr_size; | |
12077 | } | |
12078 | else | |
12079 | { | |
12080 | /* We have to copy the data here, because DW_OP_call4 will only | |
12081 | use a DW_AT_location attribute. */ | |
12082 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
12083 | ptr += DW_BLOCK (member_loc)->size; | |
12084 | } | |
12085 | ||
12086 | *ptr++ = DW_OP_plus; | |
12087 | gdb_assert (ptr - baton->data == baton->size); | |
12088 | ||
0971de02 | 12089 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 12090 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
12091 | } |
12092 | ||
4357ac6c TT |
12093 | /* Create appropriate locally-scoped variables for all the |
12094 | DW_TAG_common_block entries. Also create a struct common_block | |
12095 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
12096 | is used to sepate the common blocks name namespace from regular | |
12097 | variable names. */ | |
c906108c SS |
12098 | |
12099 | static void | |
e7c27a73 | 12100 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12101 | { |
0971de02 TT |
12102 | struct attribute *attr; |
12103 | ||
12104 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
12105 | if (attr) | |
12106 | { | |
12107 | /* Support the .debug_loc offsets. */ | |
12108 | if (attr_form_is_block (attr)) | |
12109 | { | |
12110 | /* Ok. */ | |
12111 | } | |
12112 | else if (attr_form_is_section_offset (attr)) | |
12113 | { | |
12114 | dwarf2_complex_location_expr_complaint (); | |
12115 | attr = NULL; | |
12116 | } | |
12117 | else | |
12118 | { | |
12119 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
12120 | "common block member"); | |
12121 | attr = NULL; | |
12122 | } | |
12123 | } | |
12124 | ||
639d11d3 | 12125 | if (die->child != NULL) |
c906108c | 12126 | { |
4357ac6c TT |
12127 | struct objfile *objfile = cu->objfile; |
12128 | struct die_info *child_die; | |
12129 | size_t n_entries = 0, size; | |
12130 | struct common_block *common_block; | |
12131 | struct symbol *sym; | |
74ac6d43 | 12132 | |
4357ac6c TT |
12133 | for (child_die = die->child; |
12134 | child_die && child_die->tag; | |
12135 | child_die = sibling_die (child_die)) | |
12136 | ++n_entries; | |
12137 | ||
12138 | size = (sizeof (struct common_block) | |
12139 | + (n_entries - 1) * sizeof (struct symbol *)); | |
12140 | common_block = obstack_alloc (&objfile->objfile_obstack, size); | |
12141 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); | |
12142 | common_block->n_entries = 0; | |
12143 | ||
12144 | for (child_die = die->child; | |
12145 | child_die && child_die->tag; | |
12146 | child_die = sibling_die (child_die)) | |
12147 | { | |
12148 | /* Create the symbol in the DW_TAG_common_block block in the current | |
12149 | symbol scope. */ | |
e7c27a73 | 12150 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
12151 | if (sym != NULL) |
12152 | { | |
12153 | struct attribute *member_loc; | |
12154 | ||
12155 | common_block->contents[common_block->n_entries++] = sym; | |
12156 | ||
12157 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
12158 | cu); | |
12159 | if (member_loc) | |
12160 | { | |
12161 | /* GDB has handled this for a long time, but it is | |
12162 | not specified by DWARF. It seems to have been | |
12163 | emitted by gfortran at least as recently as: | |
12164 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
12165 | complaint (&symfile_complaints, | |
12166 | _("Variable in common block has " | |
12167 | "DW_AT_data_member_location " | |
12168 | "- DIE at 0x%x [in module %s]"), | |
12169 | child_die->offset.sect_off, cu->objfile->name); | |
12170 | ||
12171 | if (attr_form_is_section_offset (member_loc)) | |
12172 | dwarf2_complex_location_expr_complaint (); | |
12173 | else if (attr_form_is_constant (member_loc) | |
12174 | || attr_form_is_block (member_loc)) | |
12175 | { | |
12176 | if (attr) | |
12177 | mark_common_block_symbol_computed (sym, die, attr, | |
12178 | member_loc, cu); | |
12179 | } | |
12180 | else | |
12181 | dwarf2_complex_location_expr_complaint (); | |
12182 | } | |
12183 | } | |
c906108c | 12184 | } |
4357ac6c TT |
12185 | |
12186 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
12187 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
12188 | } |
12189 | } | |
12190 | ||
0114d602 | 12191 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 12192 | |
0114d602 DJ |
12193 | static struct type * |
12194 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 12195 | { |
e7c27a73 | 12196 | struct objfile *objfile = cu->objfile; |
0114d602 | 12197 | const char *previous_prefix, *name; |
9219021c | 12198 | int is_anonymous; |
0114d602 DJ |
12199 | struct type *type; |
12200 | ||
12201 | /* For extensions, reuse the type of the original namespace. */ | |
12202 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
12203 | { | |
12204 | struct die_info *ext_die; | |
12205 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 12206 | |
0114d602 DJ |
12207 | ext_die = dwarf2_extension (die, &ext_cu); |
12208 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
12209 | |
12210 | /* EXT_CU may not be the same as CU. | |
02142a6c | 12211 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
12212 | return set_die_type (die, type, cu); |
12213 | } | |
9219021c | 12214 | |
e142c38c | 12215 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
12216 | |
12217 | /* Now build the name of the current namespace. */ | |
12218 | ||
0114d602 DJ |
12219 | previous_prefix = determine_prefix (die, cu); |
12220 | if (previous_prefix[0] != '\0') | |
12221 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 12222 | previous_prefix, name, 0, cu); |
0114d602 DJ |
12223 | |
12224 | /* Create the type. */ | |
12225 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, NULL, | |
12226 | objfile); | |
abee88f2 | 12227 | TYPE_NAME (type) = name; |
0114d602 DJ |
12228 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
12229 | ||
60531b24 | 12230 | return set_die_type (die, type, cu); |
0114d602 DJ |
12231 | } |
12232 | ||
12233 | /* Read a C++ namespace. */ | |
12234 | ||
12235 | static void | |
12236 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
12237 | { | |
12238 | struct objfile *objfile = cu->objfile; | |
0114d602 | 12239 | int is_anonymous; |
9219021c | 12240 | |
5c4e30ca DC |
12241 | /* Add a symbol associated to this if we haven't seen the namespace |
12242 | before. Also, add a using directive if it's an anonymous | |
12243 | namespace. */ | |
9219021c | 12244 | |
f2f0e013 | 12245 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
12246 | { |
12247 | struct type *type; | |
12248 | ||
0114d602 | 12249 | type = read_type_die (die, cu); |
e7c27a73 | 12250 | new_symbol (die, type, cu); |
5c4e30ca | 12251 | |
e8e80198 | 12252 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 12253 | if (is_anonymous) |
0114d602 DJ |
12254 | { |
12255 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 12256 | |
c0cc3a76 | 12257 | cp_add_using_directive (previous_prefix, TYPE_NAME (type), NULL, |
12aaed36 | 12258 | NULL, NULL, 0, &objfile->objfile_obstack); |
0114d602 | 12259 | } |
5c4e30ca | 12260 | } |
9219021c | 12261 | |
639d11d3 | 12262 | if (die->child != NULL) |
d9fa45fe | 12263 | { |
639d11d3 | 12264 | struct die_info *child_die = die->child; |
6e70227d | 12265 | |
d9fa45fe DC |
12266 | while (child_die && child_die->tag) |
12267 | { | |
e7c27a73 | 12268 | process_die (child_die, cu); |
d9fa45fe DC |
12269 | child_die = sibling_die (child_die); |
12270 | } | |
12271 | } | |
38d518c9 EZ |
12272 | } |
12273 | ||
f55ee35c JK |
12274 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
12275 | imported module. Still we need that type as local Fortran "use ... only" | |
12276 | declaration imports depend on the created type in determine_prefix. */ | |
12277 | ||
12278 | static struct type * | |
12279 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
12280 | { | |
12281 | struct objfile *objfile = cu->objfile; | |
15d034d0 | 12282 | const char *module_name; |
f55ee35c JK |
12283 | struct type *type; |
12284 | ||
12285 | module_name = dwarf2_name (die, cu); | |
12286 | if (!module_name) | |
3e43a32a MS |
12287 | complaint (&symfile_complaints, |
12288 | _("DW_TAG_module has no name, offset 0x%x"), | |
b64f50a1 | 12289 | die->offset.sect_off); |
f55ee35c JK |
12290 | type = init_type (TYPE_CODE_MODULE, 0, 0, module_name, objfile); |
12291 | ||
12292 | /* determine_prefix uses TYPE_TAG_NAME. */ | |
12293 | TYPE_TAG_NAME (type) = TYPE_NAME (type); | |
12294 | ||
12295 | return set_die_type (die, type, cu); | |
12296 | } | |
12297 | ||
5d7cb8df JK |
12298 | /* Read a Fortran module. */ |
12299 | ||
12300 | static void | |
12301 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
12302 | { | |
12303 | struct die_info *child_die = die->child; | |
12304 | ||
5d7cb8df JK |
12305 | while (child_die && child_die->tag) |
12306 | { | |
12307 | process_die (child_die, cu); | |
12308 | child_die = sibling_die (child_die); | |
12309 | } | |
12310 | } | |
12311 | ||
38d518c9 EZ |
12312 | /* Return the name of the namespace represented by DIE. Set |
12313 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
12314 | namespace. */ | |
12315 | ||
12316 | static const char * | |
e142c38c | 12317 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
12318 | { |
12319 | struct die_info *current_die; | |
12320 | const char *name = NULL; | |
12321 | ||
12322 | /* Loop through the extensions until we find a name. */ | |
12323 | ||
12324 | for (current_die = die; | |
12325 | current_die != NULL; | |
f2f0e013 | 12326 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 12327 | { |
e142c38c | 12328 | name = dwarf2_name (current_die, cu); |
38d518c9 EZ |
12329 | if (name != NULL) |
12330 | break; | |
12331 | } | |
12332 | ||
12333 | /* Is it an anonymous namespace? */ | |
12334 | ||
12335 | *is_anonymous = (name == NULL); | |
12336 | if (*is_anonymous) | |
2b1dbab0 | 12337 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
12338 | |
12339 | return name; | |
d9fa45fe DC |
12340 | } |
12341 | ||
c906108c SS |
12342 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
12343 | the user defined type vector. */ | |
12344 | ||
f792889a | 12345 | static struct type * |
e7c27a73 | 12346 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12347 | { |
5e2b427d | 12348 | struct gdbarch *gdbarch = get_objfile_arch (cu->objfile); |
e7c27a73 | 12349 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 12350 | struct type *type; |
8b2dbe47 KB |
12351 | struct attribute *attr_byte_size; |
12352 | struct attribute *attr_address_class; | |
12353 | int byte_size, addr_class; | |
7e314c57 JK |
12354 | struct type *target_type; |
12355 | ||
12356 | target_type = die_type (die, cu); | |
c906108c | 12357 | |
7e314c57 JK |
12358 | /* The die_type call above may have already set the type for this DIE. */ |
12359 | type = get_die_type (die, cu); | |
12360 | if (type) | |
12361 | return type; | |
12362 | ||
12363 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 12364 | |
e142c38c | 12365 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
12366 | if (attr_byte_size) |
12367 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 12368 | else |
8b2dbe47 KB |
12369 | byte_size = cu_header->addr_size; |
12370 | ||
e142c38c | 12371 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
12372 | if (attr_address_class) |
12373 | addr_class = DW_UNSND (attr_address_class); | |
12374 | else | |
12375 | addr_class = DW_ADDR_none; | |
12376 | ||
12377 | /* If the pointer size or address class is different than the | |
12378 | default, create a type variant marked as such and set the | |
12379 | length accordingly. */ | |
12380 | if (TYPE_LENGTH (type) != byte_size || addr_class != DW_ADDR_none) | |
c906108c | 12381 | { |
5e2b427d | 12382 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
12383 | { |
12384 | int type_flags; | |
12385 | ||
849957d9 | 12386 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 12387 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
12388 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
12389 | == 0); | |
8b2dbe47 KB |
12390 | type = make_type_with_address_space (type, type_flags); |
12391 | } | |
12392 | else if (TYPE_LENGTH (type) != byte_size) | |
12393 | { | |
3e43a32a MS |
12394 | complaint (&symfile_complaints, |
12395 | _("invalid pointer size %d"), byte_size); | |
8b2dbe47 | 12396 | } |
6e70227d | 12397 | else |
9a619af0 MS |
12398 | { |
12399 | /* Should we also complain about unhandled address classes? */ | |
12400 | } | |
c906108c | 12401 | } |
8b2dbe47 KB |
12402 | |
12403 | TYPE_LENGTH (type) = byte_size; | |
f792889a | 12404 | return set_die_type (die, type, cu); |
c906108c SS |
12405 | } |
12406 | ||
12407 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
12408 | the user defined type vector. */ | |
12409 | ||
f792889a | 12410 | static struct type * |
e7c27a73 | 12411 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
12412 | { |
12413 | struct type *type; | |
12414 | struct type *to_type; | |
12415 | struct type *domain; | |
12416 | ||
e7c27a73 DJ |
12417 | to_type = die_type (die, cu); |
12418 | domain = die_containing_type (die, cu); | |
0d5de010 | 12419 | |
7e314c57 JK |
12420 | /* The calls above may have already set the type for this DIE. */ |
12421 | type = get_die_type (die, cu); | |
12422 | if (type) | |
12423 | return type; | |
12424 | ||
0d5de010 DJ |
12425 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
12426 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
12427 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
12428 | { | |
12429 | struct type *new_type = alloc_type (cu->objfile); | |
12430 | ||
12431 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
12432 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
12433 | TYPE_VARARGS (to_type)); | |
12434 | type = lookup_methodptr_type (new_type); | |
12435 | } | |
0d5de010 DJ |
12436 | else |
12437 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 12438 | |
f792889a | 12439 | return set_die_type (die, type, cu); |
c906108c SS |
12440 | } |
12441 | ||
12442 | /* Extract all information from a DW_TAG_reference_type DIE and add to | |
12443 | the user defined type vector. */ | |
12444 | ||
f792889a | 12445 | static struct type * |
e7c27a73 | 12446 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12447 | { |
e7c27a73 | 12448 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 12449 | struct type *type, *target_type; |
c906108c SS |
12450 | struct attribute *attr; |
12451 | ||
7e314c57 JK |
12452 | target_type = die_type (die, cu); |
12453 | ||
12454 | /* The die_type call above may have already set the type for this DIE. */ | |
12455 | type = get_die_type (die, cu); | |
12456 | if (type) | |
12457 | return type; | |
12458 | ||
12459 | type = lookup_reference_type (target_type); | |
e142c38c | 12460 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12461 | if (attr) |
12462 | { | |
12463 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
12464 | } | |
12465 | else | |
12466 | { | |
107d2387 | 12467 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 12468 | } |
f792889a | 12469 | return set_die_type (die, type, cu); |
c906108c SS |
12470 | } |
12471 | ||
f792889a | 12472 | static struct type * |
e7c27a73 | 12473 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12474 | { |
f792889a | 12475 | struct type *base_type, *cv_type; |
c906108c | 12476 | |
e7c27a73 | 12477 | base_type = die_type (die, cu); |
7e314c57 JK |
12478 | |
12479 | /* The die_type call above may have already set the type for this DIE. */ | |
12480 | cv_type = get_die_type (die, cu); | |
12481 | if (cv_type) | |
12482 | return cv_type; | |
12483 | ||
2f608a3a KW |
12484 | /* In case the const qualifier is applied to an array type, the element type |
12485 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
12486 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
12487 | { | |
12488 | struct type *el_type, *inner_array; | |
12489 | ||
12490 | base_type = copy_type (base_type); | |
12491 | inner_array = base_type; | |
12492 | ||
12493 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
12494 | { | |
12495 | TYPE_TARGET_TYPE (inner_array) = | |
12496 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
12497 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
12498 | } | |
12499 | ||
12500 | el_type = TYPE_TARGET_TYPE (inner_array); | |
12501 | TYPE_TARGET_TYPE (inner_array) = | |
12502 | make_cv_type (1, TYPE_VOLATILE (el_type), el_type, NULL); | |
12503 | ||
12504 | return set_die_type (die, base_type, cu); | |
12505 | } | |
12506 | ||
f792889a DJ |
12507 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
12508 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12509 | } |
12510 | ||
f792889a | 12511 | static struct type * |
e7c27a73 | 12512 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12513 | { |
f792889a | 12514 | struct type *base_type, *cv_type; |
c906108c | 12515 | |
e7c27a73 | 12516 | base_type = die_type (die, cu); |
7e314c57 JK |
12517 | |
12518 | /* The die_type call above may have already set the type for this DIE. */ | |
12519 | cv_type = get_die_type (die, cu); | |
12520 | if (cv_type) | |
12521 | return cv_type; | |
12522 | ||
f792889a DJ |
12523 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
12524 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
12525 | } |
12526 | ||
06d66ee9 TT |
12527 | /* Handle DW_TAG_restrict_type. */ |
12528 | ||
12529 | static struct type * | |
12530 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
12531 | { | |
12532 | struct type *base_type, *cv_type; | |
12533 | ||
12534 | base_type = die_type (die, cu); | |
12535 | ||
12536 | /* The die_type call above may have already set the type for this DIE. */ | |
12537 | cv_type = get_die_type (die, cu); | |
12538 | if (cv_type) | |
12539 | return cv_type; | |
12540 | ||
12541 | cv_type = make_restrict_type (base_type); | |
12542 | return set_die_type (die, cv_type, cu); | |
12543 | } | |
12544 | ||
c906108c SS |
12545 | /* Extract all information from a DW_TAG_string_type DIE and add to |
12546 | the user defined type vector. It isn't really a user defined type, | |
12547 | but it behaves like one, with other DIE's using an AT_user_def_type | |
12548 | attribute to reference it. */ | |
12549 | ||
f792889a | 12550 | static struct type * |
e7c27a73 | 12551 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12552 | { |
e7c27a73 | 12553 | struct objfile *objfile = cu->objfile; |
3b7538c0 | 12554 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
12555 | struct type *type, *range_type, *index_type, *char_type; |
12556 | struct attribute *attr; | |
12557 | unsigned int length; | |
12558 | ||
e142c38c | 12559 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
c906108c SS |
12560 | if (attr) |
12561 | { | |
12562 | length = DW_UNSND (attr); | |
12563 | } | |
12564 | else | |
12565 | { | |
0963b4bd | 12566 | /* Check for the DW_AT_byte_size attribute. */ |
e142c38c | 12567 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
b21b22e0 PS |
12568 | if (attr) |
12569 | { | |
12570 | length = DW_UNSND (attr); | |
12571 | } | |
12572 | else | |
12573 | { | |
12574 | length = 1; | |
12575 | } | |
c906108c | 12576 | } |
6ccb9162 | 12577 | |
46bf5051 | 12578 | index_type = objfile_type (objfile)->builtin_int; |
c906108c | 12579 | range_type = create_range_type (NULL, index_type, 1, length); |
3b7538c0 UW |
12580 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
12581 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 12582 | |
f792889a | 12583 | return set_die_type (die, type, cu); |
c906108c SS |
12584 | } |
12585 | ||
12586 | /* Handle DIES due to C code like: | |
12587 | ||
12588 | struct foo | |
c5aa993b JM |
12589 | { |
12590 | int (*funcp)(int a, long l); | |
12591 | int b; | |
12592 | }; | |
c906108c | 12593 | |
0963b4bd | 12594 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 12595 | |
f792889a | 12596 | static struct type * |
e7c27a73 | 12597 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12598 | { |
bb5ed363 | 12599 | struct objfile *objfile = cu->objfile; |
0963b4bd MS |
12600 | struct type *type; /* Type that this function returns. */ |
12601 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
12602 | struct attribute *attr; |
12603 | ||
e7c27a73 | 12604 | type = die_type (die, cu); |
7e314c57 JK |
12605 | |
12606 | /* The die_type call above may have already set the type for this DIE. */ | |
12607 | ftype = get_die_type (die, cu); | |
12608 | if (ftype) | |
12609 | return ftype; | |
12610 | ||
0c8b41f1 | 12611 | ftype = lookup_function_type (type); |
c906108c | 12612 | |
5b8101ae | 12613 | /* All functions in C++, Pascal and Java have prototypes. */ |
e142c38c | 12614 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); |
c906108c | 12615 | if ((attr && (DW_UNSND (attr) != 0)) |
987504bb | 12616 | || cu->language == language_cplus |
5b8101ae PM |
12617 | || cu->language == language_java |
12618 | || cu->language == language_pascal) | |
876cecd0 | 12619 | TYPE_PROTOTYPED (ftype) = 1; |
a6c727b2 DJ |
12620 | else if (producer_is_realview (cu->producer)) |
12621 | /* RealView does not emit DW_AT_prototyped. We can not | |
12622 | distinguish prototyped and unprototyped functions; default to | |
12623 | prototyped, since that is more common in modern code (and | |
12624 | RealView warns about unprototyped functions). */ | |
12625 | TYPE_PROTOTYPED (ftype) = 1; | |
c906108c | 12626 | |
c055b101 CV |
12627 | /* Store the calling convention in the type if it's available in |
12628 | the subroutine die. Otherwise set the calling convention to | |
12629 | the default value DW_CC_normal. */ | |
12630 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
54fcddd0 UW |
12631 | if (attr) |
12632 | TYPE_CALLING_CONVENTION (ftype) = DW_UNSND (attr); | |
12633 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) | |
12634 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
12635 | else | |
12636 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 GM |
12637 | |
12638 | /* We need to add the subroutine type to the die immediately so | |
12639 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 12640 | declared as the same subroutine type. */ |
76c10ea2 | 12641 | set_die_type (die, ftype, cu); |
6e70227d | 12642 | |
639d11d3 | 12643 | if (die->child != NULL) |
c906108c | 12644 | { |
bb5ed363 | 12645 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 12646 | struct die_info *child_die; |
8072405b | 12647 | int nparams, iparams; |
c906108c SS |
12648 | |
12649 | /* Count the number of parameters. | |
12650 | FIXME: GDB currently ignores vararg functions, but knows about | |
12651 | vararg member functions. */ | |
8072405b | 12652 | nparams = 0; |
639d11d3 | 12653 | child_die = die->child; |
c906108c SS |
12654 | while (child_die && child_die->tag) |
12655 | { | |
12656 | if (child_die->tag == DW_TAG_formal_parameter) | |
12657 | nparams++; | |
12658 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 12659 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
12660 | child_die = sibling_die (child_die); |
12661 | } | |
12662 | ||
12663 | /* Allocate storage for parameters and fill them in. */ | |
12664 | TYPE_NFIELDS (ftype) = nparams; | |
12665 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 12666 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 12667 | |
8072405b JK |
12668 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
12669 | even if we error out during the parameters reading below. */ | |
12670 | for (iparams = 0; iparams < nparams; iparams++) | |
12671 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
12672 | ||
12673 | iparams = 0; | |
639d11d3 | 12674 | child_die = die->child; |
c906108c SS |
12675 | while (child_die && child_die->tag) |
12676 | { | |
12677 | if (child_die->tag == DW_TAG_formal_parameter) | |
12678 | { | |
3ce3b1ba PA |
12679 | struct type *arg_type; |
12680 | ||
12681 | /* DWARF version 2 has no clean way to discern C++ | |
12682 | static and non-static member functions. G++ helps | |
12683 | GDB by marking the first parameter for non-static | |
12684 | member functions (which is the this pointer) as | |
12685 | artificial. We pass this information to | |
12686 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
12687 | ||
12688 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
12689 | 4.5 does not yet generate. */ | |
e142c38c | 12690 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
c906108c SS |
12691 | if (attr) |
12692 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); | |
12693 | else | |
418835cc KS |
12694 | { |
12695 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; | |
12696 | ||
12697 | /* GCC/43521: In java, the formal parameter | |
12698 | "this" is sometimes not marked with DW_AT_artificial. */ | |
12699 | if (cu->language == language_java) | |
12700 | { | |
12701 | const char *name = dwarf2_name (child_die, cu); | |
9a619af0 | 12702 | |
418835cc KS |
12703 | if (name && !strcmp (name, "this")) |
12704 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 1; | |
12705 | } | |
12706 | } | |
3ce3b1ba PA |
12707 | arg_type = die_type (child_die, cu); |
12708 | ||
12709 | /* RealView does not mark THIS as const, which the testsuite | |
12710 | expects. GCC marks THIS as const in method definitions, | |
12711 | but not in the class specifications (GCC PR 43053). */ | |
12712 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
12713 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
12714 | { | |
12715 | int is_this = 0; | |
12716 | struct dwarf2_cu *arg_cu = cu; | |
12717 | const char *name = dwarf2_name (child_die, cu); | |
12718 | ||
12719 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
12720 | if (attr) | |
12721 | { | |
12722 | /* If the compiler emits this, use it. */ | |
12723 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
12724 | is_this = 1; | |
12725 | } | |
12726 | else if (name && strcmp (name, "this") == 0) | |
12727 | /* Function definitions will have the argument names. */ | |
12728 | is_this = 1; | |
12729 | else if (name == NULL && iparams == 0) | |
12730 | /* Declarations may not have the names, so like | |
12731 | elsewhere in GDB, assume an artificial first | |
12732 | argument is "this". */ | |
12733 | is_this = 1; | |
12734 | ||
12735 | if (is_this) | |
12736 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
12737 | arg_type, 0); | |
12738 | } | |
12739 | ||
12740 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
12741 | iparams++; |
12742 | } | |
12743 | child_die = sibling_die (child_die); | |
12744 | } | |
12745 | } | |
12746 | ||
76c10ea2 | 12747 | return ftype; |
c906108c SS |
12748 | } |
12749 | ||
f792889a | 12750 | static struct type * |
e7c27a73 | 12751 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12752 | { |
e7c27a73 | 12753 | struct objfile *objfile = cu->objfile; |
0114d602 | 12754 | const char *name = NULL; |
3c8e0968 | 12755 | struct type *this_type, *target_type; |
c906108c | 12756 | |
94af9270 | 12757 | name = dwarf2_full_name (NULL, die, cu); |
f792889a | 12758 | this_type = init_type (TYPE_CODE_TYPEDEF, 0, |
0114d602 | 12759 | TYPE_FLAG_TARGET_STUB, NULL, objfile); |
abee88f2 | 12760 | TYPE_NAME (this_type) = name; |
f792889a | 12761 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
12762 | target_type = die_type (die, cu); |
12763 | if (target_type != this_type) | |
12764 | TYPE_TARGET_TYPE (this_type) = target_type; | |
12765 | else | |
12766 | { | |
12767 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
12768 | spec and cause infinite loops in GDB. */ | |
12769 | complaint (&symfile_complaints, | |
12770 | _("Self-referential DW_TAG_typedef " | |
12771 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 12772 | die->offset.sect_off, objfile->name); |
3c8e0968 DE |
12773 | TYPE_TARGET_TYPE (this_type) = NULL; |
12774 | } | |
f792889a | 12775 | return this_type; |
c906108c SS |
12776 | } |
12777 | ||
12778 | /* Find a representation of a given base type and install | |
12779 | it in the TYPE field of the die. */ | |
12780 | ||
f792889a | 12781 | static struct type * |
e7c27a73 | 12782 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12783 | { |
e7c27a73 | 12784 | struct objfile *objfile = cu->objfile; |
c906108c SS |
12785 | struct type *type; |
12786 | struct attribute *attr; | |
12787 | int encoding = 0, size = 0; | |
15d034d0 | 12788 | const char *name; |
6ccb9162 UW |
12789 | enum type_code code = TYPE_CODE_INT; |
12790 | int type_flags = 0; | |
12791 | struct type *target_type = NULL; | |
c906108c | 12792 | |
e142c38c | 12793 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
c906108c SS |
12794 | if (attr) |
12795 | { | |
12796 | encoding = DW_UNSND (attr); | |
12797 | } | |
e142c38c | 12798 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
c906108c SS |
12799 | if (attr) |
12800 | { | |
12801 | size = DW_UNSND (attr); | |
12802 | } | |
39cbfefa | 12803 | name = dwarf2_name (die, cu); |
6ccb9162 | 12804 | if (!name) |
c906108c | 12805 | { |
6ccb9162 UW |
12806 | complaint (&symfile_complaints, |
12807 | _("DW_AT_name missing from DW_TAG_base_type")); | |
c906108c | 12808 | } |
6ccb9162 UW |
12809 | |
12810 | switch (encoding) | |
c906108c | 12811 | { |
6ccb9162 UW |
12812 | case DW_ATE_address: |
12813 | /* Turn DW_ATE_address into a void * pointer. */ | |
12814 | code = TYPE_CODE_PTR; | |
12815 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12816 | target_type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile); | |
12817 | break; | |
12818 | case DW_ATE_boolean: | |
12819 | code = TYPE_CODE_BOOL; | |
12820 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12821 | break; | |
12822 | case DW_ATE_complex_float: | |
12823 | code = TYPE_CODE_COMPLEX; | |
12824 | target_type = init_type (TYPE_CODE_FLT, size / 2, 0, NULL, objfile); | |
12825 | break; | |
12826 | case DW_ATE_decimal_float: | |
12827 | code = TYPE_CODE_DECFLOAT; | |
12828 | break; | |
12829 | case DW_ATE_float: | |
12830 | code = TYPE_CODE_FLT; | |
12831 | break; | |
12832 | case DW_ATE_signed: | |
12833 | break; | |
12834 | case DW_ATE_unsigned: | |
12835 | type_flags |= TYPE_FLAG_UNSIGNED; | |
3b2b8fea TT |
12836 | if (cu->language == language_fortran |
12837 | && name | |
12838 | && strncmp (name, "character(", sizeof ("character(") - 1) == 0) | |
12839 | code = TYPE_CODE_CHAR; | |
6ccb9162 UW |
12840 | break; |
12841 | case DW_ATE_signed_char: | |
6e70227d | 12842 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12843 | || cu->language == language_pascal |
12844 | || cu->language == language_fortran) | |
6ccb9162 UW |
12845 | code = TYPE_CODE_CHAR; |
12846 | break; | |
12847 | case DW_ATE_unsigned_char: | |
868a0084 | 12848 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
12849 | || cu->language == language_pascal |
12850 | || cu->language == language_fortran) | |
6ccb9162 UW |
12851 | code = TYPE_CODE_CHAR; |
12852 | type_flags |= TYPE_FLAG_UNSIGNED; | |
12853 | break; | |
75079b2b TT |
12854 | case DW_ATE_UTF: |
12855 | /* We just treat this as an integer and then recognize the | |
12856 | type by name elsewhere. */ | |
12857 | break; | |
12858 | ||
6ccb9162 UW |
12859 | default: |
12860 | complaint (&symfile_complaints, _("unsupported DW_AT_encoding: '%s'"), | |
12861 | dwarf_type_encoding_name (encoding)); | |
12862 | break; | |
c906108c | 12863 | } |
6ccb9162 | 12864 | |
0114d602 DJ |
12865 | type = init_type (code, size, type_flags, NULL, objfile); |
12866 | TYPE_NAME (type) = name; | |
6ccb9162 UW |
12867 | TYPE_TARGET_TYPE (type) = target_type; |
12868 | ||
0114d602 | 12869 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 12870 | TYPE_NOSIGN (type) = 1; |
0114d602 | 12871 | |
f792889a | 12872 | return set_die_type (die, type, cu); |
c906108c SS |
12873 | } |
12874 | ||
a02abb62 JB |
12875 | /* Read the given DW_AT_subrange DIE. */ |
12876 | ||
f792889a | 12877 | static struct type * |
a02abb62 JB |
12878 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
12879 | { | |
4c9ad8c2 | 12880 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
12881 | struct type *range_type; |
12882 | struct attribute *attr; | |
4fae6e18 JK |
12883 | LONGEST low, high; |
12884 | int low_default_is_valid; | |
15d034d0 | 12885 | const char *name; |
43bbcdc2 | 12886 | LONGEST negative_mask; |
e77813c8 | 12887 | |
4c9ad8c2 TT |
12888 | orig_base_type = die_type (die, cu); |
12889 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, | |
12890 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
12891 | creating the range type, but we use the result of check_typedef | |
12892 | when examining properties of the type. */ | |
12893 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 12894 | |
7e314c57 JK |
12895 | /* The die_type call above may have already set the type for this DIE. */ |
12896 | range_type = get_die_type (die, cu); | |
12897 | if (range_type) | |
12898 | return range_type; | |
12899 | ||
4fae6e18 JK |
12900 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
12901 | omitting DW_AT_lower_bound. */ | |
12902 | switch (cu->language) | |
6e70227d | 12903 | { |
4fae6e18 JK |
12904 | case language_c: |
12905 | case language_cplus: | |
12906 | low = 0; | |
12907 | low_default_is_valid = 1; | |
12908 | break; | |
12909 | case language_fortran: | |
12910 | low = 1; | |
12911 | low_default_is_valid = 1; | |
12912 | break; | |
12913 | case language_d: | |
12914 | case language_java: | |
12915 | case language_objc: | |
12916 | low = 0; | |
12917 | low_default_is_valid = (cu->header.version >= 4); | |
12918 | break; | |
12919 | case language_ada: | |
12920 | case language_m2: | |
12921 | case language_pascal: | |
a02abb62 | 12922 | low = 1; |
4fae6e18 JK |
12923 | low_default_is_valid = (cu->header.version >= 4); |
12924 | break; | |
12925 | default: | |
12926 | low = 0; | |
12927 | low_default_is_valid = 0; | |
12928 | break; | |
a02abb62 JB |
12929 | } |
12930 | ||
dd5e6932 DJ |
12931 | /* FIXME: For variable sized arrays either of these could be |
12932 | a variable rather than a constant value. We'll allow it, | |
12933 | but we don't know how to handle it. */ | |
e142c38c | 12934 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
a02abb62 | 12935 | if (attr) |
4fae6e18 JK |
12936 | low = dwarf2_get_attr_constant_value (attr, low); |
12937 | else if (!low_default_is_valid) | |
12938 | complaint (&symfile_complaints, _("Missing DW_AT_lower_bound " | |
12939 | "- DIE at 0x%x [in module %s]"), | |
12940 | die->offset.sect_off, cu->objfile->name); | |
a02abb62 | 12941 | |
e142c38c | 12942 | attr = dwarf2_attr (die, DW_AT_upper_bound, cu); |
a02abb62 | 12943 | if (attr) |
6e70227d | 12944 | { |
d48323d8 | 12945 | if (attr_form_is_block (attr) || is_ref_attr (attr)) |
a02abb62 JB |
12946 | { |
12947 | /* GCC encodes arrays with unspecified or dynamic length | |
e77813c8 | 12948 | with a DW_FORM_block1 attribute or a reference attribute. |
a02abb62 JB |
12949 | FIXME: GDB does not yet know how to handle dynamic |
12950 | arrays properly, treat them as arrays with unspecified | |
12951 | length for now. | |
12952 | ||
12953 | FIXME: jimb/2003-09-22: GDB does not really know | |
12954 | how to handle arrays of unspecified length | |
12955 | either; we just represent them as zero-length | |
12956 | arrays. Choose an appropriate upper bound given | |
12957 | the lower bound we've computed above. */ | |
12958 | high = low - 1; | |
12959 | } | |
12960 | else | |
12961 | high = dwarf2_get_attr_constant_value (attr, 1); | |
12962 | } | |
e77813c8 PM |
12963 | else |
12964 | { | |
12965 | attr = dwarf2_attr (die, DW_AT_count, cu); | |
12966 | if (attr) | |
12967 | { | |
12968 | int count = dwarf2_get_attr_constant_value (attr, 1); | |
12969 | high = low + count - 1; | |
12970 | } | |
c2ff108b JK |
12971 | else |
12972 | { | |
12973 | /* Unspecified array length. */ | |
12974 | high = low - 1; | |
12975 | } | |
e77813c8 PM |
12976 | } |
12977 | ||
12978 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
12979 | without specifying a base type. | |
12980 | In that case, the base type must be set to the type of | |
12981 | the lower bound, upper bound or count, in that order, if any of these | |
12982 | three attributes references an object that has a type. | |
12983 | If no base type is found, the Dwarf-2 specifications say that | |
12984 | a signed integer type of size equal to the size of an address should | |
12985 | be used. | |
12986 | For the following C code: `extern char gdb_int [];' | |
12987 | GCC produces an empty range DIE. | |
12988 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
0963b4bd | 12989 | high bound or count are not yet handled by this code. */ |
e77813c8 PM |
12990 | if (TYPE_CODE (base_type) == TYPE_CODE_VOID) |
12991 | { | |
12992 | struct objfile *objfile = cu->objfile; | |
12993 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
12994 | int addr_size = gdbarch_addr_bit (gdbarch) /8; | |
12995 | struct type *int_type = objfile_type (objfile)->builtin_int; | |
12996 | ||
12997 | /* Test "int", "long int", and "long long int" objfile types, | |
12998 | and select the first one having a size above or equal to the | |
12999 | architecture address size. */ | |
13000 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13001 | base_type = int_type; | |
13002 | else | |
13003 | { | |
13004 | int_type = objfile_type (objfile)->builtin_long; | |
13005 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13006 | base_type = int_type; | |
13007 | else | |
13008 | { | |
13009 | int_type = objfile_type (objfile)->builtin_long_long; | |
13010 | if (int_type && TYPE_LENGTH (int_type) >= addr_size) | |
13011 | base_type = int_type; | |
13012 | } | |
13013 | } | |
13014 | } | |
a02abb62 | 13015 | |
6e70227d | 13016 | negative_mask = |
43bbcdc2 PH |
13017 | (LONGEST) -1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1); |
13018 | if (!TYPE_UNSIGNED (base_type) && (low & negative_mask)) | |
13019 | low |= negative_mask; | |
13020 | if (!TYPE_UNSIGNED (base_type) && (high & negative_mask)) | |
13021 | high |= negative_mask; | |
13022 | ||
4c9ad8c2 | 13023 | range_type = create_range_type (NULL, orig_base_type, low, high); |
a02abb62 | 13024 | |
bbb0eef6 JK |
13025 | /* Mark arrays with dynamic length at least as an array of unspecified |
13026 | length. GDB could check the boundary but before it gets implemented at | |
13027 | least allow accessing the array elements. */ | |
d48323d8 | 13028 | if (attr && attr_form_is_block (attr)) |
bbb0eef6 JK |
13029 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; |
13030 | ||
c2ff108b JK |
13031 | /* Ada expects an empty array on no boundary attributes. */ |
13032 | if (attr == NULL && cu->language != language_ada) | |
13033 | TYPE_HIGH_BOUND_UNDEFINED (range_type) = 1; | |
13034 | ||
39cbfefa DJ |
13035 | name = dwarf2_name (die, cu); |
13036 | if (name) | |
13037 | TYPE_NAME (range_type) = name; | |
6e70227d | 13038 | |
e142c38c | 13039 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
a02abb62 JB |
13040 | if (attr) |
13041 | TYPE_LENGTH (range_type) = DW_UNSND (attr); | |
13042 | ||
7e314c57 JK |
13043 | set_die_type (die, range_type, cu); |
13044 | ||
13045 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
13046 | set_descriptive_type (range_type, die, cu); |
13047 | ||
7e314c57 | 13048 | return range_type; |
a02abb62 | 13049 | } |
6e70227d | 13050 | |
f792889a | 13051 | static struct type * |
81a17f79 JB |
13052 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
13053 | { | |
13054 | struct type *type; | |
81a17f79 | 13055 | |
81a17f79 JB |
13056 | /* For now, we only support the C meaning of an unspecified type: void. */ |
13057 | ||
0114d602 DJ |
13058 | type = init_type (TYPE_CODE_VOID, 0, 0, NULL, cu->objfile); |
13059 | TYPE_NAME (type) = dwarf2_name (die, cu); | |
81a17f79 | 13060 | |
f792889a | 13061 | return set_die_type (die, type, cu); |
81a17f79 | 13062 | } |
a02abb62 | 13063 | |
639d11d3 DC |
13064 | /* Read a single die and all its descendents. Set the die's sibling |
13065 | field to NULL; set other fields in the die correctly, and set all | |
13066 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
13067 | location of the info_ptr after reading all of those dies. PARENT | |
13068 | is the parent of the die in question. */ | |
13069 | ||
13070 | static struct die_info * | |
dee91e82 | 13071 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
13072 | const gdb_byte *info_ptr, |
13073 | const gdb_byte **new_info_ptr, | |
dee91e82 | 13074 | struct die_info *parent) |
639d11d3 DC |
13075 | { |
13076 | struct die_info *die; | |
d521ce57 | 13077 | const gdb_byte *cur_ptr; |
639d11d3 DC |
13078 | int has_children; |
13079 | ||
bf6af496 | 13080 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
13081 | if (die == NULL) |
13082 | { | |
13083 | *new_info_ptr = cur_ptr; | |
13084 | return NULL; | |
13085 | } | |
93311388 | 13086 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
13087 | |
13088 | if (has_children) | |
bf6af496 | 13089 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
13090 | else |
13091 | { | |
13092 | die->child = NULL; | |
13093 | *new_info_ptr = cur_ptr; | |
13094 | } | |
13095 | ||
13096 | die->sibling = NULL; | |
13097 | die->parent = parent; | |
13098 | return die; | |
13099 | } | |
13100 | ||
13101 | /* Read a die, all of its descendents, and all of its siblings; set | |
13102 | all of the fields of all of the dies correctly. Arguments are as | |
13103 | in read_die_and_children. */ | |
13104 | ||
13105 | static struct die_info * | |
bf6af496 | 13106 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
13107 | const gdb_byte *info_ptr, |
13108 | const gdb_byte **new_info_ptr, | |
bf6af496 | 13109 | struct die_info *parent) |
639d11d3 DC |
13110 | { |
13111 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 13112 | const gdb_byte *cur_ptr; |
639d11d3 | 13113 | |
c906108c | 13114 | cur_ptr = info_ptr; |
639d11d3 DC |
13115 | first_die = last_sibling = NULL; |
13116 | ||
13117 | while (1) | |
c906108c | 13118 | { |
639d11d3 | 13119 | struct die_info *die |
dee91e82 | 13120 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 13121 | |
1d325ec1 | 13122 | if (die == NULL) |
c906108c | 13123 | { |
639d11d3 DC |
13124 | *new_info_ptr = cur_ptr; |
13125 | return first_die; | |
c906108c | 13126 | } |
1d325ec1 DJ |
13127 | |
13128 | if (!first_die) | |
13129 | first_die = die; | |
c906108c | 13130 | else |
1d325ec1 DJ |
13131 | last_sibling->sibling = die; |
13132 | ||
13133 | last_sibling = die; | |
c906108c | 13134 | } |
c906108c SS |
13135 | } |
13136 | ||
bf6af496 DE |
13137 | /* Read a die, all of its descendents, and all of its siblings; set |
13138 | all of the fields of all of the dies correctly. Arguments are as | |
13139 | in read_die_and_children. | |
13140 | This the main entry point for reading a DIE and all its children. */ | |
13141 | ||
13142 | static struct die_info * | |
13143 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
13144 | const gdb_byte *info_ptr, |
13145 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
13146 | struct die_info *parent) |
13147 | { | |
13148 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
13149 | new_info_ptr, parent); | |
13150 | ||
13151 | if (dwarf2_die_debug) | |
13152 | { | |
13153 | fprintf_unfiltered (gdb_stdlog, | |
13154 | "Read die from %s@0x%x of %s:\n", | |
13155 | bfd_section_name (reader->abfd, | |
13156 | reader->die_section->asection), | |
13157 | (unsigned) (info_ptr - reader->die_section->buffer), | |
13158 | bfd_get_filename (reader->abfd)); | |
13159 | dump_die (die, dwarf2_die_debug); | |
13160 | } | |
13161 | ||
13162 | return die; | |
13163 | } | |
13164 | ||
3019eac3 DE |
13165 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
13166 | attributes. | |
13167 | The caller is responsible for filling in the extra attributes | |
13168 | and updating (*DIEP)->num_attrs. | |
13169 | Set DIEP to point to a newly allocated die with its information, | |
13170 | except for its child, sibling, and parent fields. | |
13171 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 13172 | |
d521ce57 | 13173 | static const gdb_byte * |
3019eac3 | 13174 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 13175 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 13176 | int *has_children, int num_extra_attrs) |
93311388 | 13177 | { |
b64f50a1 JK |
13178 | unsigned int abbrev_number, bytes_read, i; |
13179 | sect_offset offset; | |
93311388 DE |
13180 | struct abbrev_info *abbrev; |
13181 | struct die_info *die; | |
13182 | struct dwarf2_cu *cu = reader->cu; | |
13183 | bfd *abfd = reader->abfd; | |
13184 | ||
b64f50a1 | 13185 | offset.sect_off = info_ptr - reader->buffer; |
93311388 DE |
13186 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
13187 | info_ptr += bytes_read; | |
13188 | if (!abbrev_number) | |
13189 | { | |
13190 | *diep = NULL; | |
13191 | *has_children = 0; | |
13192 | return info_ptr; | |
13193 | } | |
13194 | ||
433df2d4 | 13195 | abbrev = abbrev_table_lookup_abbrev (cu->abbrev_table, abbrev_number); |
93311388 | 13196 | if (!abbrev) |
348e048f DE |
13197 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
13198 | abbrev_number, | |
13199 | bfd_get_filename (abfd)); | |
13200 | ||
3019eac3 | 13201 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
93311388 DE |
13202 | die->offset = offset; |
13203 | die->tag = abbrev->tag; | |
13204 | die->abbrev = abbrev_number; | |
13205 | ||
3019eac3 DE |
13206 | /* Make the result usable. |
13207 | The caller needs to update num_attrs after adding the extra | |
13208 | attributes. */ | |
93311388 DE |
13209 | die->num_attrs = abbrev->num_attrs; |
13210 | ||
13211 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
13212 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
13213 | info_ptr); | |
93311388 DE |
13214 | |
13215 | *diep = die; | |
13216 | *has_children = abbrev->has_children; | |
13217 | return info_ptr; | |
13218 | } | |
13219 | ||
3019eac3 DE |
13220 | /* Read a die and all its attributes. |
13221 | Set DIEP to point to a newly allocated die with its information, | |
13222 | except for its child, sibling, and parent fields. | |
13223 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
13224 | ||
d521ce57 | 13225 | static const gdb_byte * |
3019eac3 | 13226 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 13227 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
13228 | int *has_children) |
13229 | { | |
d521ce57 | 13230 | const gdb_byte *result; |
bf6af496 DE |
13231 | |
13232 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
13233 | ||
13234 | if (dwarf2_die_debug) | |
13235 | { | |
13236 | fprintf_unfiltered (gdb_stdlog, | |
13237 | "Read die from %s@0x%x of %s:\n", | |
13238 | bfd_section_name (reader->abfd, | |
13239 | reader->die_section->asection), | |
13240 | (unsigned) (info_ptr - reader->die_section->buffer), | |
13241 | bfd_get_filename (reader->abfd)); | |
13242 | dump_die (*diep, dwarf2_die_debug); | |
13243 | } | |
13244 | ||
13245 | return result; | |
3019eac3 | 13246 | } |
433df2d4 DE |
13247 | \f |
13248 | /* Abbreviation tables. | |
3019eac3 | 13249 | |
433df2d4 | 13250 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
13251 | stored in a separate .debug_abbrev section. Before we read any |
13252 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
13253 | in a hash table. */ |
13254 | ||
13255 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
13256 | ||
13257 | static struct abbrev_info * | |
13258 | abbrev_table_alloc_abbrev (struct abbrev_table *abbrev_table) | |
13259 | { | |
13260 | struct abbrev_info *abbrev; | |
13261 | ||
13262 | abbrev = (struct abbrev_info *) | |
13263 | obstack_alloc (&abbrev_table->abbrev_obstack, sizeof (struct abbrev_info)); | |
13264 | memset (abbrev, 0, sizeof (struct abbrev_info)); | |
13265 | return abbrev; | |
13266 | } | |
13267 | ||
13268 | /* Add an abbreviation to the table. */ | |
c906108c SS |
13269 | |
13270 | static void | |
433df2d4 DE |
13271 | abbrev_table_add_abbrev (struct abbrev_table *abbrev_table, |
13272 | unsigned int abbrev_number, | |
13273 | struct abbrev_info *abbrev) | |
13274 | { | |
13275 | unsigned int hash_number; | |
13276 | ||
13277 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
13278 | abbrev->next = abbrev_table->abbrevs[hash_number]; | |
13279 | abbrev_table->abbrevs[hash_number] = abbrev; | |
13280 | } | |
dee91e82 | 13281 | |
433df2d4 DE |
13282 | /* Look up an abbrev in the table. |
13283 | Returns NULL if the abbrev is not found. */ | |
13284 | ||
13285 | static struct abbrev_info * | |
13286 | abbrev_table_lookup_abbrev (const struct abbrev_table *abbrev_table, | |
13287 | unsigned int abbrev_number) | |
c906108c | 13288 | { |
433df2d4 DE |
13289 | unsigned int hash_number; |
13290 | struct abbrev_info *abbrev; | |
13291 | ||
13292 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
13293 | abbrev = abbrev_table->abbrevs[hash_number]; | |
13294 | ||
13295 | while (abbrev) | |
13296 | { | |
13297 | if (abbrev->number == abbrev_number) | |
13298 | return abbrev; | |
13299 | abbrev = abbrev->next; | |
13300 | } | |
13301 | return NULL; | |
13302 | } | |
13303 | ||
13304 | /* Read in an abbrev table. */ | |
13305 | ||
13306 | static struct abbrev_table * | |
13307 | abbrev_table_read_table (struct dwarf2_section_info *section, | |
13308 | sect_offset offset) | |
13309 | { | |
13310 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
13311 | bfd *abfd = section->asection->owner; | |
13312 | struct abbrev_table *abbrev_table; | |
d521ce57 | 13313 | const gdb_byte *abbrev_ptr; |
c906108c SS |
13314 | struct abbrev_info *cur_abbrev; |
13315 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 13316 | unsigned int abbrev_form; |
f3dd6933 DJ |
13317 | struct attr_abbrev *cur_attrs; |
13318 | unsigned int allocated_attrs; | |
c906108c | 13319 | |
433df2d4 | 13320 | abbrev_table = XMALLOC (struct abbrev_table); |
f4dc4d17 | 13321 | abbrev_table->offset = offset; |
433df2d4 DE |
13322 | obstack_init (&abbrev_table->abbrev_obstack); |
13323 | abbrev_table->abbrevs = obstack_alloc (&abbrev_table->abbrev_obstack, | |
13324 | (ABBREV_HASH_SIZE | |
13325 | * sizeof (struct abbrev_info *))); | |
13326 | memset (abbrev_table->abbrevs, 0, | |
13327 | ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); | |
c906108c | 13328 | |
433df2d4 DE |
13329 | dwarf2_read_section (objfile, section); |
13330 | abbrev_ptr = section->buffer + offset.sect_off; | |
c906108c SS |
13331 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13332 | abbrev_ptr += bytes_read; | |
13333 | ||
f3dd6933 DJ |
13334 | allocated_attrs = ATTR_ALLOC_CHUNK; |
13335 | cur_attrs = xmalloc (allocated_attrs * sizeof (struct attr_abbrev)); | |
6e70227d | 13336 | |
0963b4bd | 13337 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
13338 | while (abbrev_number) |
13339 | { | |
433df2d4 | 13340 | cur_abbrev = abbrev_table_alloc_abbrev (abbrev_table); |
c906108c SS |
13341 | |
13342 | /* read in abbrev header */ | |
13343 | cur_abbrev->number = abbrev_number; | |
13344 | cur_abbrev->tag = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13345 | abbrev_ptr += bytes_read; | |
13346 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
13347 | abbrev_ptr += 1; | |
13348 | ||
13349 | /* now read in declarations */ | |
13350 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13351 | abbrev_ptr += bytes_read; | |
13352 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13353 | abbrev_ptr += bytes_read; | |
13354 | while (abbrev_name) | |
13355 | { | |
f3dd6933 | 13356 | if (cur_abbrev->num_attrs == allocated_attrs) |
c906108c | 13357 | { |
f3dd6933 DJ |
13358 | allocated_attrs += ATTR_ALLOC_CHUNK; |
13359 | cur_attrs | |
13360 | = xrealloc (cur_attrs, (allocated_attrs | |
13361 | * sizeof (struct attr_abbrev))); | |
c906108c | 13362 | } |
ae038cb0 | 13363 | |
f3dd6933 DJ |
13364 | cur_attrs[cur_abbrev->num_attrs].name = abbrev_name; |
13365 | cur_attrs[cur_abbrev->num_attrs++].form = abbrev_form; | |
c906108c SS |
13366 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
13367 | abbrev_ptr += bytes_read; | |
13368 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13369 | abbrev_ptr += bytes_read; | |
13370 | } | |
13371 | ||
433df2d4 | 13372 | cur_abbrev->attrs = obstack_alloc (&abbrev_table->abbrev_obstack, |
f3dd6933 DJ |
13373 | (cur_abbrev->num_attrs |
13374 | * sizeof (struct attr_abbrev))); | |
13375 | memcpy (cur_abbrev->attrs, cur_attrs, | |
13376 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); | |
13377 | ||
433df2d4 | 13378 | abbrev_table_add_abbrev (abbrev_table, abbrev_number, cur_abbrev); |
c906108c SS |
13379 | |
13380 | /* Get next abbreviation. | |
13381 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
13382 | always properly terminated with an abbrev number of 0. |
13383 | Exit loop if we encounter an abbreviation which we have | |
13384 | already read (which means we are about to read the abbreviations | |
13385 | for the next compile unit) or if the end of the abbreviation | |
13386 | table is reached. */ | |
433df2d4 | 13387 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
13388 | break; |
13389 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
13390 | abbrev_ptr += bytes_read; | |
433df2d4 | 13391 | if (abbrev_table_lookup_abbrev (abbrev_table, abbrev_number) != NULL) |
c906108c SS |
13392 | break; |
13393 | } | |
f3dd6933 DJ |
13394 | |
13395 | xfree (cur_attrs); | |
433df2d4 | 13396 | return abbrev_table; |
c906108c SS |
13397 | } |
13398 | ||
433df2d4 | 13399 | /* Free the resources held by ABBREV_TABLE. */ |
c906108c | 13400 | |
c906108c | 13401 | static void |
433df2d4 | 13402 | abbrev_table_free (struct abbrev_table *abbrev_table) |
c906108c | 13403 | { |
433df2d4 DE |
13404 | obstack_free (&abbrev_table->abbrev_obstack, NULL); |
13405 | xfree (abbrev_table); | |
c906108c SS |
13406 | } |
13407 | ||
f4dc4d17 DE |
13408 | /* Same as abbrev_table_free but as a cleanup. |
13409 | We pass in a pointer to the pointer to the table so that we can | |
13410 | set the pointer to NULL when we're done. It also simplifies | |
13411 | build_type_unit_groups. */ | |
13412 | ||
13413 | static void | |
13414 | abbrev_table_free_cleanup (void *table_ptr) | |
13415 | { | |
13416 | struct abbrev_table **abbrev_table_ptr = table_ptr; | |
13417 | ||
13418 | if (*abbrev_table_ptr != NULL) | |
13419 | abbrev_table_free (*abbrev_table_ptr); | |
13420 | *abbrev_table_ptr = NULL; | |
13421 | } | |
13422 | ||
433df2d4 DE |
13423 | /* Read the abbrev table for CU from ABBREV_SECTION. */ |
13424 | ||
13425 | static void | |
13426 | dwarf2_read_abbrevs (struct dwarf2_cu *cu, | |
13427 | struct dwarf2_section_info *abbrev_section) | |
c906108c | 13428 | { |
433df2d4 DE |
13429 | cu->abbrev_table = |
13430 | abbrev_table_read_table (abbrev_section, cu->header.abbrev_offset); | |
13431 | } | |
c906108c | 13432 | |
433df2d4 | 13433 | /* Release the memory used by the abbrev table for a compilation unit. */ |
c906108c | 13434 | |
433df2d4 DE |
13435 | static void |
13436 | dwarf2_free_abbrev_table (void *ptr_to_cu) | |
13437 | { | |
13438 | struct dwarf2_cu *cu = ptr_to_cu; | |
c906108c | 13439 | |
433df2d4 DE |
13440 | abbrev_table_free (cu->abbrev_table); |
13441 | /* Set this to NULL so that we SEGV if we try to read it later, | |
13442 | and also because free_comp_unit verifies this is NULL. */ | |
13443 | cu->abbrev_table = NULL; | |
13444 | } | |
13445 | \f | |
72bf9492 DJ |
13446 | /* Returns nonzero if TAG represents a type that we might generate a partial |
13447 | symbol for. */ | |
13448 | ||
13449 | static int | |
13450 | is_type_tag_for_partial (int tag) | |
13451 | { | |
13452 | switch (tag) | |
13453 | { | |
13454 | #if 0 | |
13455 | /* Some types that would be reasonable to generate partial symbols for, | |
13456 | that we don't at present. */ | |
13457 | case DW_TAG_array_type: | |
13458 | case DW_TAG_file_type: | |
13459 | case DW_TAG_ptr_to_member_type: | |
13460 | case DW_TAG_set_type: | |
13461 | case DW_TAG_string_type: | |
13462 | case DW_TAG_subroutine_type: | |
13463 | #endif | |
13464 | case DW_TAG_base_type: | |
13465 | case DW_TAG_class_type: | |
680b30c7 | 13466 | case DW_TAG_interface_type: |
72bf9492 DJ |
13467 | case DW_TAG_enumeration_type: |
13468 | case DW_TAG_structure_type: | |
13469 | case DW_TAG_subrange_type: | |
13470 | case DW_TAG_typedef: | |
13471 | case DW_TAG_union_type: | |
13472 | return 1; | |
13473 | default: | |
13474 | return 0; | |
13475 | } | |
13476 | } | |
13477 | ||
13478 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
13479 | ||
13480 | static struct partial_die_info * | |
dee91e82 | 13481 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 13482 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 13483 | { |
dee91e82 | 13484 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13485 | struct objfile *objfile = cu->objfile; |
72bf9492 DJ |
13486 | struct partial_die_info *part_die; |
13487 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; | |
13488 | struct abbrev_info *abbrev; | |
13489 | unsigned int bytes_read; | |
5afb4e99 | 13490 | unsigned int load_all = 0; |
72bf9492 DJ |
13491 | int nesting_level = 1; |
13492 | ||
13493 | parent_die = NULL; | |
13494 | last_die = NULL; | |
13495 | ||
7adf1e79 DE |
13496 | gdb_assert (cu->per_cu != NULL); |
13497 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
13498 | load_all = 1; |
13499 | ||
72bf9492 DJ |
13500 | cu->partial_dies |
13501 | = htab_create_alloc_ex (cu->header.length / 12, | |
13502 | partial_die_hash, | |
13503 | partial_die_eq, | |
13504 | NULL, | |
13505 | &cu->comp_unit_obstack, | |
13506 | hashtab_obstack_allocate, | |
13507 | dummy_obstack_deallocate); | |
13508 | ||
13509 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13510 | sizeof (struct partial_die_info)); | |
13511 | ||
13512 | while (1) | |
13513 | { | |
13514 | abbrev = peek_die_abbrev (info_ptr, &bytes_read, cu); | |
13515 | ||
13516 | /* A NULL abbrev means the end of a series of children. */ | |
13517 | if (abbrev == NULL) | |
13518 | { | |
13519 | if (--nesting_level == 0) | |
13520 | { | |
13521 | /* PART_DIE was probably the last thing allocated on the | |
13522 | comp_unit_obstack, so we could call obstack_free | |
13523 | here. We don't do that because the waste is small, | |
13524 | and will be cleaned up when we're done with this | |
13525 | compilation unit. This way, we're also more robust | |
13526 | against other users of the comp_unit_obstack. */ | |
13527 | return first_die; | |
13528 | } | |
13529 | info_ptr += bytes_read; | |
13530 | last_die = parent_die; | |
13531 | parent_die = parent_die->die_parent; | |
13532 | continue; | |
13533 | } | |
13534 | ||
98bfdba5 PA |
13535 | /* Check for template arguments. We never save these; if |
13536 | they're seen, we just mark the parent, and go on our way. */ | |
13537 | if (parent_die != NULL | |
13538 | && cu->language == language_cplus | |
13539 | && (abbrev->tag == DW_TAG_template_type_param | |
13540 | || abbrev->tag == DW_TAG_template_value_param)) | |
13541 | { | |
13542 | parent_die->has_template_arguments = 1; | |
13543 | ||
13544 | if (!load_all) | |
13545 | { | |
13546 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 13547 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13548 | continue; |
13549 | } | |
13550 | } | |
13551 | ||
0d99eb77 | 13552 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
13553 | Skip their other children. */ |
13554 | if (!load_all | |
13555 | && cu->language == language_cplus | |
13556 | && parent_die != NULL | |
13557 | && parent_die->tag == DW_TAG_subprogram) | |
13558 | { | |
dee91e82 | 13559 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
13560 | continue; |
13561 | } | |
13562 | ||
5afb4e99 DJ |
13563 | /* Check whether this DIE is interesting enough to save. Normally |
13564 | we would not be interested in members here, but there may be | |
13565 | later variables referencing them via DW_AT_specification (for | |
13566 | static members). */ | |
13567 | if (!load_all | |
13568 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 13569 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
13570 | && abbrev->tag != DW_TAG_enumerator |
13571 | && abbrev->tag != DW_TAG_subprogram | |
bc30ff58 | 13572 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 13573 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 13574 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 13575 | && abbrev->tag != DW_TAG_module |
95554aad TT |
13576 | && abbrev->tag != DW_TAG_member |
13577 | && abbrev->tag != DW_TAG_imported_unit) | |
72bf9492 DJ |
13578 | { |
13579 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13580 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
13581 | continue; |
13582 | } | |
13583 | ||
dee91e82 DE |
13584 | info_ptr = read_partial_die (reader, part_die, abbrev, bytes_read, |
13585 | info_ptr); | |
72bf9492 DJ |
13586 | |
13587 | /* This two-pass algorithm for processing partial symbols has a | |
13588 | high cost in cache pressure. Thus, handle some simple cases | |
13589 | here which cover the majority of C partial symbols. DIEs | |
13590 | which neither have specification tags in them, nor could have | |
13591 | specification tags elsewhere pointing at them, can simply be | |
13592 | processed and discarded. | |
13593 | ||
13594 | This segment is also optional; scan_partial_symbols and | |
13595 | add_partial_symbol will handle these DIEs if we chain | |
13596 | them in normally. When compilers which do not emit large | |
13597 | quantities of duplicate debug information are more common, | |
13598 | this code can probably be removed. */ | |
13599 | ||
13600 | /* Any complete simple types at the top level (pretty much all | |
13601 | of them, for a language without namespaces), can be processed | |
13602 | directly. */ | |
13603 | if (parent_die == NULL | |
13604 | && part_die->has_specification == 0 | |
13605 | && part_die->is_declaration == 0 | |
d8228535 | 13606 | && ((part_die->tag == DW_TAG_typedef && !part_die->has_children) |
72bf9492 DJ |
13607 | || part_die->tag == DW_TAG_base_type |
13608 | || part_die->tag == DW_TAG_subrange_type)) | |
13609 | { | |
13610 | if (building_psymtab && part_die->name != NULL) | |
04a679b8 | 13611 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13612 | VAR_DOMAIN, LOC_TYPEDEF, |
bb5ed363 DE |
13613 | &objfile->static_psymbols, |
13614 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
dee91e82 | 13615 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13616 | continue; |
13617 | } | |
13618 | ||
d8228535 JK |
13619 | /* The exception for DW_TAG_typedef with has_children above is |
13620 | a workaround of GCC PR debug/47510. In the case of this complaint | |
13621 | type_name_no_tag_or_error will error on such types later. | |
13622 | ||
13623 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
13624 | it could not find the child DIEs referenced later, this is checked | |
13625 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
13626 | ||
13627 | if (part_die->tag == DW_TAG_typedef && part_die->has_children) | |
13628 | complaint (&symfile_complaints, | |
13629 | _("DW_TAG_typedef has childen - GCC PR debug/47510 bug " | |
13630 | "- DIE at 0x%x [in module %s]"), | |
b64f50a1 | 13631 | part_die->offset.sect_off, objfile->name); |
d8228535 | 13632 | |
72bf9492 DJ |
13633 | /* If we're at the second level, and we're an enumerator, and |
13634 | our parent has no specification (meaning possibly lives in a | |
13635 | namespace elsewhere), then we can add the partial symbol now | |
13636 | instead of queueing it. */ | |
13637 | if (part_die->tag == DW_TAG_enumerator | |
13638 | && parent_die != NULL | |
13639 | && parent_die->die_parent == NULL | |
13640 | && parent_die->tag == DW_TAG_enumeration_type | |
13641 | && parent_die->has_specification == 0) | |
13642 | { | |
13643 | if (part_die->name == NULL) | |
3e43a32a MS |
13644 | complaint (&symfile_complaints, |
13645 | _("malformed enumerator DIE ignored")); | |
72bf9492 | 13646 | else if (building_psymtab) |
04a679b8 | 13647 | add_psymbol_to_list (part_die->name, strlen (part_die->name), 0, |
72bf9492 | 13648 | VAR_DOMAIN, LOC_CONST, |
987504bb JJ |
13649 | (cu->language == language_cplus |
13650 | || cu->language == language_java) | |
bb5ed363 DE |
13651 | ? &objfile->global_psymbols |
13652 | : &objfile->static_psymbols, | |
13653 | 0, (CORE_ADDR) 0, cu->language, objfile); | |
72bf9492 | 13654 | |
dee91e82 | 13655 | info_ptr = locate_pdi_sibling (reader, part_die, info_ptr); |
72bf9492 DJ |
13656 | continue; |
13657 | } | |
13658 | ||
13659 | /* We'll save this DIE so link it in. */ | |
13660 | part_die->die_parent = parent_die; | |
13661 | part_die->die_sibling = NULL; | |
13662 | part_die->die_child = NULL; | |
13663 | ||
13664 | if (last_die && last_die == parent_die) | |
13665 | last_die->die_child = part_die; | |
13666 | else if (last_die) | |
13667 | last_die->die_sibling = part_die; | |
13668 | ||
13669 | last_die = part_die; | |
13670 | ||
13671 | if (first_die == NULL) | |
13672 | first_die = part_die; | |
13673 | ||
13674 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
13675 | find interesting need to be in the hash table, because we | |
13676 | also have the parent/sibling/child chains; only those that we | |
13677 | might refer to by offset later during partial symbol reading. | |
13678 | ||
13679 | For now this means things that might have be the target of a | |
13680 | DW_AT_specification, DW_AT_abstract_origin, or | |
13681 | DW_AT_extension. DW_AT_extension will refer only to | |
13682 | namespaces; DW_AT_abstract_origin refers to functions (and | |
13683 | many things under the function DIE, but we do not recurse | |
13684 | into function DIEs during partial symbol reading) and | |
13685 | possibly variables as well; DW_AT_specification refers to | |
13686 | declarations. Declarations ought to have the DW_AT_declaration | |
13687 | flag. It happens that GCC forgets to put it in sometimes, but | |
13688 | only for functions, not for types. | |
13689 | ||
13690 | Adding more things than necessary to the hash table is harmless | |
13691 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
13692 | wasted time in find_partial_die, when we reread the compilation |
13693 | unit with load_all_dies set. */ | |
72bf9492 | 13694 | |
5afb4e99 | 13695 | if (load_all |
72929c62 | 13696 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 13697 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
13698 | || abbrev->tag == DW_TAG_variable |
13699 | || abbrev->tag == DW_TAG_namespace | |
13700 | || part_die->is_declaration) | |
13701 | { | |
13702 | void **slot; | |
13703 | ||
13704 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
b64f50a1 | 13705 | part_die->offset.sect_off, INSERT); |
72bf9492 DJ |
13706 | *slot = part_die; |
13707 | } | |
13708 | ||
13709 | part_die = obstack_alloc (&cu->comp_unit_obstack, | |
13710 | sizeof (struct partial_die_info)); | |
13711 | ||
13712 | /* For some DIEs we want to follow their children (if any). For C | |
bc30ff58 | 13713 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
13714 | languages we have to, so that we can get at method physnames |
13715 | to infer fully qualified class names, for DW_AT_specification, | |
13716 | and for C++ template arguments. For C++, we also look one level | |
13717 | inside functions to find template arguments (if the name of the | |
13718 | function does not already contain the template arguments). | |
bc30ff58 JB |
13719 | |
13720 | For Ada, we need to scan the children of subprograms and lexical | |
13721 | blocks as well because Ada allows the definition of nested | |
13722 | entities that could be interesting for the debugger, such as | |
13723 | nested subprograms for instance. */ | |
72bf9492 | 13724 | if (last_die->has_children |
5afb4e99 DJ |
13725 | && (load_all |
13726 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 13727 | || last_die->tag == DW_TAG_module |
72bf9492 | 13728 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
13729 | || (cu->language == language_cplus |
13730 | && last_die->tag == DW_TAG_subprogram | |
13731 | && (last_die->name == NULL | |
13732 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
13733 | || (cu->language != language_c |
13734 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 13735 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 13736 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 JB |
13737 | || last_die->tag == DW_TAG_union_type)) |
13738 | || (cu->language == language_ada | |
13739 | && (last_die->tag == DW_TAG_subprogram | |
13740 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
13741 | { |
13742 | nesting_level++; | |
13743 | parent_die = last_die; | |
13744 | continue; | |
13745 | } | |
13746 | ||
13747 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 13748 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
13749 | |
13750 | /* Back to the top, do it again. */ | |
13751 | } | |
13752 | } | |
13753 | ||
c906108c SS |
13754 | /* Read a minimal amount of information into the minimal die structure. */ |
13755 | ||
d521ce57 | 13756 | static const gdb_byte * |
dee91e82 DE |
13757 | read_partial_die (const struct die_reader_specs *reader, |
13758 | struct partial_die_info *part_die, | |
13759 | struct abbrev_info *abbrev, unsigned int abbrev_len, | |
d521ce57 | 13760 | const gdb_byte *info_ptr) |
c906108c | 13761 | { |
dee91e82 | 13762 | struct dwarf2_cu *cu = reader->cu; |
bb5ed363 | 13763 | struct objfile *objfile = cu->objfile; |
d521ce57 | 13764 | const gdb_byte *buffer = reader->buffer; |
fa238c03 | 13765 | unsigned int i; |
c906108c | 13766 | struct attribute attr; |
c5aa993b | 13767 | int has_low_pc_attr = 0; |
c906108c | 13768 | int has_high_pc_attr = 0; |
91da1414 | 13769 | int high_pc_relative = 0; |
c906108c | 13770 | |
72bf9492 | 13771 | memset (part_die, 0, sizeof (struct partial_die_info)); |
c906108c | 13772 | |
b64f50a1 | 13773 | part_die->offset.sect_off = info_ptr - buffer; |
72bf9492 DJ |
13774 | |
13775 | info_ptr += abbrev_len; | |
13776 | ||
13777 | if (abbrev == NULL) | |
13778 | return info_ptr; | |
13779 | ||
c906108c SS |
13780 | part_die->tag = abbrev->tag; |
13781 | part_die->has_children = abbrev->has_children; | |
c906108c SS |
13782 | |
13783 | for (i = 0; i < abbrev->num_attrs; ++i) | |
13784 | { | |
dee91e82 | 13785 | info_ptr = read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
c906108c SS |
13786 | |
13787 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 13788 | partial symbol table. */ |
c906108c SS |
13789 | switch (attr.name) |
13790 | { | |
13791 | case DW_AT_name: | |
71c25dea TT |
13792 | switch (part_die->tag) |
13793 | { | |
13794 | case DW_TAG_compile_unit: | |
95554aad | 13795 | case DW_TAG_partial_unit: |
348e048f | 13796 | case DW_TAG_type_unit: |
71c25dea TT |
13797 | /* Compilation units have a DW_AT_name that is a filename, not |
13798 | a source language identifier. */ | |
13799 | case DW_TAG_enumeration_type: | |
13800 | case DW_TAG_enumerator: | |
13801 | /* These tags always have simple identifiers already; no need | |
13802 | to canonicalize them. */ | |
13803 | part_die->name = DW_STRING (&attr); | |
13804 | break; | |
13805 | default: | |
13806 | part_die->name | |
13807 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
bb5ed363 | 13808 | &objfile->objfile_obstack); |
71c25dea TT |
13809 | break; |
13810 | } | |
c906108c | 13811 | break; |
31ef98ae | 13812 | case DW_AT_linkage_name: |
c906108c | 13813 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
13814 | /* Note that both forms of linkage name might appear. We |
13815 | assume they will be the same, and we only store the last | |
13816 | one we see. */ | |
94af9270 KS |
13817 | if (cu->language == language_ada) |
13818 | part_die->name = DW_STRING (&attr); | |
abc72ce4 | 13819 | part_die->linkage_name = DW_STRING (&attr); |
c906108c SS |
13820 | break; |
13821 | case DW_AT_low_pc: | |
13822 | has_low_pc_attr = 1; | |
13823 | part_die->lowpc = DW_ADDR (&attr); | |
13824 | break; | |
13825 | case DW_AT_high_pc: | |
13826 | has_high_pc_attr = 1; | |
3019eac3 DE |
13827 | if (attr.form == DW_FORM_addr |
13828 | || attr.form == DW_FORM_GNU_addr_index) | |
91da1414 MW |
13829 | part_die->highpc = DW_ADDR (&attr); |
13830 | else | |
13831 | { | |
13832 | high_pc_relative = 1; | |
13833 | part_die->highpc = DW_UNSND (&attr); | |
13834 | } | |
c906108c SS |
13835 | break; |
13836 | case DW_AT_location: | |
0963b4bd | 13837 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
13838 | if (attr_form_is_block (&attr)) |
13839 | { | |
95554aad | 13840 | part_die->d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 13841 | } |
3690dd37 | 13842 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 13843 | { |
4d3c2250 | 13844 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
13845 | } |
13846 | else | |
13847 | { | |
4d3c2250 KB |
13848 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
13849 | "partial symbol information"); | |
8e19ed76 | 13850 | } |
c906108c | 13851 | break; |
c906108c SS |
13852 | case DW_AT_external: |
13853 | part_die->is_external = DW_UNSND (&attr); | |
13854 | break; | |
13855 | case DW_AT_declaration: | |
13856 | part_die->is_declaration = DW_UNSND (&attr); | |
13857 | break; | |
13858 | case DW_AT_type: | |
13859 | part_die->has_type = 1; | |
13860 | break; | |
13861 | case DW_AT_abstract_origin: | |
13862 | case DW_AT_specification: | |
72bf9492 DJ |
13863 | case DW_AT_extension: |
13864 | part_die->has_specification = 1; | |
c764a876 | 13865 | part_die->spec_offset = dwarf2_get_ref_die_offset (&attr); |
36586728 TT |
13866 | part_die->spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
13867 | || cu->per_cu->is_dwz); | |
c906108c SS |
13868 | break; |
13869 | case DW_AT_sibling: | |
13870 | /* Ignore absolute siblings, they might point outside of | |
13871 | the current compile unit. */ | |
13872 | if (attr.form == DW_FORM_ref_addr) | |
3e43a32a MS |
13873 | complaint (&symfile_complaints, |
13874 | _("ignoring absolute DW_AT_sibling")); | |
c906108c | 13875 | else |
b64f50a1 | 13876 | part_die->sibling = buffer + dwarf2_get_ref_die_offset (&attr).sect_off; |
c906108c | 13877 | break; |
fa4028e9 JB |
13878 | case DW_AT_byte_size: |
13879 | part_die->has_byte_size = 1; | |
13880 | break; | |
68511cec CES |
13881 | case DW_AT_calling_convention: |
13882 | /* DWARF doesn't provide a way to identify a program's source-level | |
13883 | entry point. DW_AT_calling_convention attributes are only meant | |
13884 | to describe functions' calling conventions. | |
13885 | ||
13886 | However, because it's a necessary piece of information in | |
13887 | Fortran, and because DW_CC_program is the only piece of debugging | |
13888 | information whose definition refers to a 'main program' at all, | |
13889 | several compilers have begun marking Fortran main programs with | |
13890 | DW_CC_program --- even when those functions use the standard | |
13891 | calling conventions. | |
13892 | ||
13893 | So until DWARF specifies a way to provide this information and | |
13894 | compilers pick up the new representation, we'll support this | |
13895 | practice. */ | |
13896 | if (DW_UNSND (&attr) == DW_CC_program | |
13897 | && cu->language == language_fortran) | |
01f8c46d JK |
13898 | { |
13899 | set_main_name (part_die->name); | |
13900 | ||
13901 | /* As this DIE has a static linkage the name would be difficult | |
13902 | to look up later. */ | |
13903 | language_of_main = language_fortran; | |
13904 | } | |
68511cec | 13905 | break; |
481860b3 GB |
13906 | case DW_AT_inline: |
13907 | if (DW_UNSND (&attr) == DW_INL_inlined | |
13908 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
13909 | part_die->may_be_inlined = 1; | |
13910 | break; | |
95554aad TT |
13911 | |
13912 | case DW_AT_import: | |
13913 | if (part_die->tag == DW_TAG_imported_unit) | |
36586728 TT |
13914 | { |
13915 | part_die->d.offset = dwarf2_get_ref_die_offset (&attr); | |
13916 | part_die->is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
13917 | || cu->per_cu->is_dwz); | |
13918 | } | |
95554aad TT |
13919 | break; |
13920 | ||
c906108c SS |
13921 | default: |
13922 | break; | |
13923 | } | |
13924 | } | |
13925 | ||
91da1414 MW |
13926 | if (high_pc_relative) |
13927 | part_die->highpc += part_die->lowpc; | |
13928 | ||
9373cf26 JK |
13929 | if (has_low_pc_attr && has_high_pc_attr) |
13930 | { | |
13931 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13932 | eliminate duplicate copies of functions and vtables and such. | |
13933 | The linker will arbitrarily choose one and discard the others. | |
13934 | The AT_*_pc values for such functions refer to local labels in | |
13935 | these sections. If the section from that file was discarded, the | |
13936 | labels are not in the output, so the relocs get a value of 0. | |
13937 | If this is a discarded function, mark the pc bounds as invalid, | |
13938 | so that GDB will ignore it. */ | |
13939 | if (part_die->lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
13940 | { | |
bb5ed363 | 13941 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13942 | |
13943 | complaint (&symfile_complaints, | |
13944 | _("DW_AT_low_pc %s is zero " | |
13945 | "for DIE at 0x%x [in module %s]"), | |
13946 | paddress (gdbarch, part_die->lowpc), | |
b64f50a1 | 13947 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13948 | } |
13949 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
13950 | else if (part_die->lowpc >= part_die->highpc) | |
13951 | { | |
bb5ed363 | 13952 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 JK |
13953 | |
13954 | complaint (&symfile_complaints, | |
13955 | _("DW_AT_low_pc %s is not < DW_AT_high_pc %s " | |
13956 | "for DIE at 0x%x [in module %s]"), | |
13957 | paddress (gdbarch, part_die->lowpc), | |
13958 | paddress (gdbarch, part_die->highpc), | |
b64f50a1 | 13959 | part_die->offset.sect_off, objfile->name); |
9373cf26 JK |
13960 | } |
13961 | else | |
13962 | part_die->has_pc_info = 1; | |
13963 | } | |
85cbf3d3 | 13964 | |
c906108c SS |
13965 | return info_ptr; |
13966 | } | |
13967 | ||
72bf9492 DJ |
13968 | /* Find a cached partial DIE at OFFSET in CU. */ |
13969 | ||
13970 | static struct partial_die_info * | |
b64f50a1 | 13971 | find_partial_die_in_comp_unit (sect_offset offset, struct dwarf2_cu *cu) |
72bf9492 DJ |
13972 | { |
13973 | struct partial_die_info *lookup_die = NULL; | |
13974 | struct partial_die_info part_die; | |
13975 | ||
13976 | part_die.offset = offset; | |
b64f50a1 JK |
13977 | lookup_die = htab_find_with_hash (cu->partial_dies, &part_die, |
13978 | offset.sect_off); | |
72bf9492 | 13979 | |
72bf9492 DJ |
13980 | return lookup_die; |
13981 | } | |
13982 | ||
348e048f DE |
13983 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
13984 | except in the case of .debug_types DIEs which do not reference | |
13985 | outside their CU (they do however referencing other types via | |
55f1336d | 13986 | DW_FORM_ref_sig8). */ |
72bf9492 DJ |
13987 | |
13988 | static struct partial_die_info * | |
36586728 | 13989 | find_partial_die (sect_offset offset, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 13990 | { |
bb5ed363 | 13991 | struct objfile *objfile = cu->objfile; |
5afb4e99 DJ |
13992 | struct dwarf2_per_cu_data *per_cu = NULL; |
13993 | struct partial_die_info *pd = NULL; | |
72bf9492 | 13994 | |
36586728 TT |
13995 | if (offset_in_dwz == cu->per_cu->is_dwz |
13996 | && offset_in_cu_p (&cu->header, offset)) | |
5afb4e99 DJ |
13997 | { |
13998 | pd = find_partial_die_in_comp_unit (offset, cu); | |
13999 | if (pd != NULL) | |
14000 | return pd; | |
0d99eb77 DE |
14001 | /* We missed recording what we needed. |
14002 | Load all dies and try again. */ | |
14003 | per_cu = cu->per_cu; | |
5afb4e99 | 14004 | } |
0d99eb77 DE |
14005 | else |
14006 | { | |
14007 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 14008 | if (cu->per_cu->is_debug_types) |
0d99eb77 DE |
14009 | { |
14010 | error (_("Dwarf Error: Type Unit at offset 0x%lx contains" | |
14011 | " external reference to offset 0x%lx [in module %s].\n"), | |
14012 | (long) cu->header.offset.sect_off, (long) offset.sect_off, | |
14013 | bfd_get_filename (objfile->obfd)); | |
14014 | } | |
36586728 TT |
14015 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
14016 | objfile); | |
72bf9492 | 14017 | |
0d99eb77 DE |
14018 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
14019 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 14020 | |
0d99eb77 DE |
14021 | per_cu->cu->last_used = 0; |
14022 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
14023 | } | |
5afb4e99 | 14024 | |
dee91e82 DE |
14025 | /* If we didn't find it, and not all dies have been loaded, |
14026 | load them all and try again. */ | |
14027 | ||
5afb4e99 DJ |
14028 | if (pd == NULL && per_cu->load_all_dies == 0) |
14029 | { | |
5afb4e99 | 14030 | per_cu->load_all_dies = 1; |
fd820528 DE |
14031 | |
14032 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
14033 | THIS_CU->cu may already be in use. So we can't just free it and | |
14034 | replace its DIEs with the ones we read in. Instead, we leave those | |
14035 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
14036 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
14037 | set. */ | |
dee91e82 | 14038 | load_partial_comp_unit (per_cu); |
5afb4e99 DJ |
14039 | |
14040 | pd = find_partial_die_in_comp_unit (offset, per_cu->cu); | |
14041 | } | |
14042 | ||
14043 | if (pd == NULL) | |
14044 | internal_error (__FILE__, __LINE__, | |
3e43a32a MS |
14045 | _("could not find partial DIE 0x%x " |
14046 | "in cache [from module %s]\n"), | |
b64f50a1 | 14047 | offset.sect_off, bfd_get_filename (objfile->obfd)); |
5afb4e99 | 14048 | return pd; |
72bf9492 DJ |
14049 | } |
14050 | ||
abc72ce4 DE |
14051 | /* See if we can figure out if the class lives in a namespace. We do |
14052 | this by looking for a member function; its demangled name will | |
14053 | contain namespace info, if there is any. */ | |
14054 | ||
14055 | static void | |
14056 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
14057 | struct dwarf2_cu *cu) | |
14058 | { | |
14059 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
14060 | what template types look like, because the demangler | |
14061 | frequently doesn't give the same name as the debug info. We | |
14062 | could fix this by only using the demangled name to get the | |
14063 | prefix (but see comment in read_structure_type). */ | |
14064 | ||
14065 | struct partial_die_info *real_pdi; | |
14066 | struct partial_die_info *child_pdi; | |
14067 | ||
14068 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
14069 | we should not do this. We'll prepend the parent's fully qualified | |
14070 | name when we create the partial symbol. */ | |
14071 | ||
14072 | real_pdi = struct_pdi; | |
14073 | while (real_pdi->has_specification) | |
36586728 TT |
14074 | real_pdi = find_partial_die (real_pdi->spec_offset, |
14075 | real_pdi->spec_is_dwz, cu); | |
abc72ce4 DE |
14076 | |
14077 | if (real_pdi->die_parent != NULL) | |
14078 | return; | |
14079 | ||
14080 | for (child_pdi = struct_pdi->die_child; | |
14081 | child_pdi != NULL; | |
14082 | child_pdi = child_pdi->die_sibling) | |
14083 | { | |
14084 | if (child_pdi->tag == DW_TAG_subprogram | |
14085 | && child_pdi->linkage_name != NULL) | |
14086 | { | |
14087 | char *actual_class_name | |
14088 | = language_class_name_from_physname (cu->language_defn, | |
14089 | child_pdi->linkage_name); | |
14090 | if (actual_class_name != NULL) | |
14091 | { | |
14092 | struct_pdi->name | |
10f0c4bb TT |
14093 | = obstack_copy0 (&cu->objfile->objfile_obstack, |
14094 | actual_class_name, | |
14095 | strlen (actual_class_name)); | |
abc72ce4 DE |
14096 | xfree (actual_class_name); |
14097 | } | |
14098 | break; | |
14099 | } | |
14100 | } | |
14101 | } | |
14102 | ||
72bf9492 DJ |
14103 | /* Adjust PART_DIE before generating a symbol for it. This function |
14104 | may set the is_external flag or change the DIE's name. */ | |
14105 | ||
14106 | static void | |
14107 | fixup_partial_die (struct partial_die_info *part_die, | |
14108 | struct dwarf2_cu *cu) | |
14109 | { | |
abc72ce4 DE |
14110 | /* Once we've fixed up a die, there's no point in doing so again. |
14111 | This also avoids a memory leak if we were to call | |
14112 | guess_partial_die_structure_name multiple times. */ | |
14113 | if (part_die->fixup_called) | |
14114 | return; | |
14115 | ||
72bf9492 DJ |
14116 | /* If we found a reference attribute and the DIE has no name, try |
14117 | to find a name in the referred to DIE. */ | |
14118 | ||
14119 | if (part_die->name == NULL && part_die->has_specification) | |
14120 | { | |
14121 | struct partial_die_info *spec_die; | |
72bf9492 | 14122 | |
36586728 TT |
14123 | spec_die = find_partial_die (part_die->spec_offset, |
14124 | part_die->spec_is_dwz, cu); | |
72bf9492 | 14125 | |
10b3939b | 14126 | fixup_partial_die (spec_die, cu); |
72bf9492 DJ |
14127 | |
14128 | if (spec_die->name) | |
14129 | { | |
14130 | part_die->name = spec_die->name; | |
14131 | ||
14132 | /* Copy DW_AT_external attribute if it is set. */ | |
14133 | if (spec_die->is_external) | |
14134 | part_die->is_external = spec_die->is_external; | |
14135 | } | |
14136 | } | |
14137 | ||
14138 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 DJ |
14139 | |
14140 | if (part_die->name == NULL && part_die->tag == DW_TAG_namespace) | |
2b1dbab0 | 14141 | part_die->name = CP_ANONYMOUS_NAMESPACE_STR; |
72bf9492 | 14142 | |
abc72ce4 DE |
14143 | /* If there is no parent die to provide a namespace, and there are |
14144 | children, see if we can determine the namespace from their linkage | |
122d1940 | 14145 | name. */ |
abc72ce4 | 14146 | if (cu->language == language_cplus |
8b70b953 | 14147 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
14148 | && part_die->die_parent == NULL |
14149 | && part_die->has_children | |
14150 | && (part_die->tag == DW_TAG_class_type | |
14151 | || part_die->tag == DW_TAG_structure_type | |
14152 | || part_die->tag == DW_TAG_union_type)) | |
14153 | guess_partial_die_structure_name (part_die, cu); | |
14154 | ||
53832f31 TT |
14155 | /* GCC might emit a nameless struct or union that has a linkage |
14156 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
14157 | if (part_die->name == NULL | |
96408a79 SA |
14158 | && (part_die->tag == DW_TAG_class_type |
14159 | || part_die->tag == DW_TAG_interface_type | |
14160 | || part_die->tag == DW_TAG_structure_type | |
14161 | || part_die->tag == DW_TAG_union_type) | |
53832f31 TT |
14162 | && part_die->linkage_name != NULL) |
14163 | { | |
14164 | char *demangled; | |
14165 | ||
8de20a37 | 14166 | demangled = gdb_demangle (part_die->linkage_name, DMGL_TYPES); |
53832f31 TT |
14167 | if (demangled) |
14168 | { | |
96408a79 SA |
14169 | const char *base; |
14170 | ||
14171 | /* Strip any leading namespaces/classes, keep only the base name. | |
14172 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
14173 | base = strrchr (demangled, ':'); | |
14174 | if (base && base > demangled && base[-1] == ':') | |
14175 | base++; | |
14176 | else | |
14177 | base = demangled; | |
14178 | ||
10f0c4bb TT |
14179 | part_die->name = obstack_copy0 (&cu->objfile->objfile_obstack, |
14180 | base, strlen (base)); | |
53832f31 TT |
14181 | xfree (demangled); |
14182 | } | |
14183 | } | |
14184 | ||
abc72ce4 | 14185 | part_die->fixup_called = 1; |
72bf9492 DJ |
14186 | } |
14187 | ||
a8329558 | 14188 | /* Read an attribute value described by an attribute form. */ |
c906108c | 14189 | |
d521ce57 | 14190 | static const gdb_byte * |
dee91e82 DE |
14191 | read_attribute_value (const struct die_reader_specs *reader, |
14192 | struct attribute *attr, unsigned form, | |
d521ce57 | 14193 | const gdb_byte *info_ptr) |
c906108c | 14194 | { |
dee91e82 DE |
14195 | struct dwarf2_cu *cu = reader->cu; |
14196 | bfd *abfd = reader->abfd; | |
e7c27a73 | 14197 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
14198 | unsigned int bytes_read; |
14199 | struct dwarf_block *blk; | |
14200 | ||
a8329558 KW |
14201 | attr->form = form; |
14202 | switch (form) | |
c906108c | 14203 | { |
c906108c | 14204 | case DW_FORM_ref_addr: |
ae411497 | 14205 | if (cu->header.version == 2) |
4568ecf9 | 14206 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 14207 | else |
4568ecf9 DE |
14208 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
14209 | &cu->header, &bytes_read); | |
ae411497 TT |
14210 | info_ptr += bytes_read; |
14211 | break; | |
36586728 TT |
14212 | case DW_FORM_GNU_ref_alt: |
14213 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
14214 | info_ptr += bytes_read; | |
14215 | break; | |
ae411497 | 14216 | case DW_FORM_addr: |
e7c27a73 | 14217 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
107d2387 | 14218 | info_ptr += bytes_read; |
c906108c SS |
14219 | break; |
14220 | case DW_FORM_block2: | |
7b5a2f43 | 14221 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14222 | blk->size = read_2_bytes (abfd, info_ptr); |
14223 | info_ptr += 2; | |
14224 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14225 | info_ptr += blk->size; | |
14226 | DW_BLOCK (attr) = blk; | |
14227 | break; | |
14228 | case DW_FORM_block4: | |
7b5a2f43 | 14229 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14230 | blk->size = read_4_bytes (abfd, info_ptr); |
14231 | info_ptr += 4; | |
14232 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14233 | info_ptr += blk->size; | |
14234 | DW_BLOCK (attr) = blk; | |
14235 | break; | |
14236 | case DW_FORM_data2: | |
14237 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
14238 | info_ptr += 2; | |
14239 | break; | |
14240 | case DW_FORM_data4: | |
14241 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
14242 | info_ptr += 4; | |
14243 | break; | |
14244 | case DW_FORM_data8: | |
14245 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
14246 | info_ptr += 8; | |
14247 | break; | |
2dc7f7b3 TT |
14248 | case DW_FORM_sec_offset: |
14249 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
14250 | info_ptr += bytes_read; | |
14251 | break; | |
c906108c | 14252 | case DW_FORM_string: |
9b1c24c8 | 14253 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 14254 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
14255 | info_ptr += bytes_read; |
14256 | break; | |
4bdf3d34 | 14257 | case DW_FORM_strp: |
36586728 TT |
14258 | if (!cu->per_cu->is_dwz) |
14259 | { | |
14260 | DW_STRING (attr) = read_indirect_string (abfd, info_ptr, cu_header, | |
14261 | &bytes_read); | |
14262 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14263 | info_ptr += bytes_read; | |
14264 | break; | |
14265 | } | |
14266 | /* FALLTHROUGH */ | |
14267 | case DW_FORM_GNU_strp_alt: | |
14268 | { | |
14269 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
14270 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, | |
14271 | &bytes_read); | |
14272 | ||
14273 | DW_STRING (attr) = read_indirect_string_from_dwz (dwz, str_offset); | |
14274 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14275 | info_ptr += bytes_read; | |
14276 | } | |
4bdf3d34 | 14277 | break; |
2dc7f7b3 | 14278 | case DW_FORM_exprloc: |
c906108c | 14279 | case DW_FORM_block: |
7b5a2f43 | 14280 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14281 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14282 | info_ptr += bytes_read; | |
14283 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14284 | info_ptr += blk->size; | |
14285 | DW_BLOCK (attr) = blk; | |
14286 | break; | |
14287 | case DW_FORM_block1: | |
7b5a2f43 | 14288 | blk = dwarf_alloc_block (cu); |
c906108c SS |
14289 | blk->size = read_1_byte (abfd, info_ptr); |
14290 | info_ptr += 1; | |
14291 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
14292 | info_ptr += blk->size; | |
14293 | DW_BLOCK (attr) = blk; | |
14294 | break; | |
14295 | case DW_FORM_data1: | |
14296 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
14297 | info_ptr += 1; | |
14298 | break; | |
14299 | case DW_FORM_flag: | |
14300 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
14301 | info_ptr += 1; | |
14302 | break; | |
2dc7f7b3 TT |
14303 | case DW_FORM_flag_present: |
14304 | DW_UNSND (attr) = 1; | |
14305 | break; | |
c906108c SS |
14306 | case DW_FORM_sdata: |
14307 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
14308 | info_ptr += bytes_read; | |
14309 | break; | |
14310 | case DW_FORM_udata: | |
14311 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14312 | info_ptr += bytes_read; | |
14313 | break; | |
14314 | case DW_FORM_ref1: | |
4568ecf9 DE |
14315 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14316 | + read_1_byte (abfd, info_ptr)); | |
c906108c SS |
14317 | info_ptr += 1; |
14318 | break; | |
14319 | case DW_FORM_ref2: | |
4568ecf9 DE |
14320 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14321 | + read_2_bytes (abfd, info_ptr)); | |
c906108c SS |
14322 | info_ptr += 2; |
14323 | break; | |
14324 | case DW_FORM_ref4: | |
4568ecf9 DE |
14325 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14326 | + read_4_bytes (abfd, info_ptr)); | |
c906108c SS |
14327 | info_ptr += 4; |
14328 | break; | |
613e1657 | 14329 | case DW_FORM_ref8: |
4568ecf9 DE |
14330 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14331 | + read_8_bytes (abfd, info_ptr)); | |
613e1657 KB |
14332 | info_ptr += 8; |
14333 | break; | |
55f1336d | 14334 | case DW_FORM_ref_sig8: |
ac9ec31b | 14335 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
14336 | info_ptr += 8; |
14337 | break; | |
c906108c | 14338 | case DW_FORM_ref_udata: |
4568ecf9 DE |
14339 | DW_UNSND (attr) = (cu->header.offset.sect_off |
14340 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); | |
c906108c SS |
14341 | info_ptr += bytes_read; |
14342 | break; | |
c906108c | 14343 | case DW_FORM_indirect: |
a8329558 KW |
14344 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
14345 | info_ptr += bytes_read; | |
dee91e82 | 14346 | info_ptr = read_attribute_value (reader, attr, form, info_ptr); |
a8329558 | 14347 | break; |
3019eac3 DE |
14348 | case DW_FORM_GNU_addr_index: |
14349 | if (reader->dwo_file == NULL) | |
14350 | { | |
14351 | /* For now flag a hard error. | |
14352 | Later we can turn this into a complaint. */ | |
14353 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14354 | dwarf_form_name (form), | |
14355 | bfd_get_filename (abfd)); | |
14356 | } | |
14357 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
14358 | info_ptr += bytes_read; | |
14359 | break; | |
14360 | case DW_FORM_GNU_str_index: | |
14361 | if (reader->dwo_file == NULL) | |
14362 | { | |
14363 | /* For now flag a hard error. | |
14364 | Later we can turn this into a complaint if warranted. */ | |
14365 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
14366 | dwarf_form_name (form), | |
14367 | bfd_get_filename (abfd)); | |
14368 | } | |
14369 | { | |
14370 | ULONGEST str_index = | |
14371 | read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
14372 | ||
14373 | DW_STRING (attr) = read_str_index (reader, cu, str_index); | |
14374 | DW_STRING_IS_CANONICAL (attr) = 0; | |
14375 | info_ptr += bytes_read; | |
14376 | } | |
14377 | break; | |
c906108c | 14378 | default: |
8a3fe4f8 | 14379 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
14380 | dwarf_form_name (form), |
14381 | bfd_get_filename (abfd)); | |
c906108c | 14382 | } |
28e94949 | 14383 | |
36586728 TT |
14384 | /* Super hack. */ |
14385 | if (cu->per_cu->is_dwz && is_ref_attr (attr)) | |
14386 | attr->form = DW_FORM_GNU_ref_alt; | |
14387 | ||
28e94949 JB |
14388 | /* We have seen instances where the compiler tried to emit a byte |
14389 | size attribute of -1 which ended up being encoded as an unsigned | |
14390 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
14391 | an object of this size seems pretty unlikely so we can relatively | |
14392 | safely treat these cases as if the size attribute was invalid and | |
14393 | treat them as zero by default. */ | |
14394 | if (attr->name == DW_AT_byte_size | |
14395 | && form == DW_FORM_data4 | |
14396 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
14397 | { |
14398 | complaint | |
14399 | (&symfile_complaints, | |
43bbcdc2 PH |
14400 | _("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
14401 | hex_string (DW_UNSND (attr))); | |
01c66ae6 JB |
14402 | DW_UNSND (attr) = 0; |
14403 | } | |
28e94949 | 14404 | |
c906108c SS |
14405 | return info_ptr; |
14406 | } | |
14407 | ||
a8329558 KW |
14408 | /* Read an attribute described by an abbreviated attribute. */ |
14409 | ||
d521ce57 | 14410 | static const gdb_byte * |
dee91e82 DE |
14411 | read_attribute (const struct die_reader_specs *reader, |
14412 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 14413 | const gdb_byte *info_ptr) |
a8329558 KW |
14414 | { |
14415 | attr->name = abbrev->name; | |
dee91e82 | 14416 | return read_attribute_value (reader, attr, abbrev->form, info_ptr); |
a8329558 KW |
14417 | } |
14418 | ||
0963b4bd | 14419 | /* Read dwarf information from a buffer. */ |
c906108c SS |
14420 | |
14421 | static unsigned int | |
a1855c1d | 14422 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14423 | { |
fe1b8b76 | 14424 | return bfd_get_8 (abfd, buf); |
c906108c SS |
14425 | } |
14426 | ||
14427 | static int | |
a1855c1d | 14428 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 14429 | { |
fe1b8b76 | 14430 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
14431 | } |
14432 | ||
14433 | static unsigned int | |
a1855c1d | 14434 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14435 | { |
fe1b8b76 | 14436 | return bfd_get_16 (abfd, buf); |
c906108c SS |
14437 | } |
14438 | ||
21ae7a4d | 14439 | static int |
a1855c1d | 14440 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14441 | { |
14442 | return bfd_get_signed_16 (abfd, buf); | |
14443 | } | |
14444 | ||
c906108c | 14445 | static unsigned int |
a1855c1d | 14446 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14447 | { |
fe1b8b76 | 14448 | return bfd_get_32 (abfd, buf); |
c906108c SS |
14449 | } |
14450 | ||
21ae7a4d | 14451 | static int |
a1855c1d | 14452 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
14453 | { |
14454 | return bfd_get_signed_32 (abfd, buf); | |
14455 | } | |
14456 | ||
93311388 | 14457 | static ULONGEST |
a1855c1d | 14458 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 14459 | { |
fe1b8b76 | 14460 | return bfd_get_64 (abfd, buf); |
c906108c SS |
14461 | } |
14462 | ||
14463 | static CORE_ADDR | |
d521ce57 | 14464 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 14465 | unsigned int *bytes_read) |
c906108c | 14466 | { |
e7c27a73 | 14467 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
14468 | CORE_ADDR retval = 0; |
14469 | ||
107d2387 | 14470 | if (cu_header->signed_addr_p) |
c906108c | 14471 | { |
107d2387 AC |
14472 | switch (cu_header->addr_size) |
14473 | { | |
14474 | case 2: | |
fe1b8b76 | 14475 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
14476 | break; |
14477 | case 4: | |
fe1b8b76 | 14478 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
14479 | break; |
14480 | case 8: | |
fe1b8b76 | 14481 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
14482 | break; |
14483 | default: | |
8e65ff28 | 14484 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 14485 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 14486 | bfd_get_filename (abfd)); |
107d2387 AC |
14487 | } |
14488 | } | |
14489 | else | |
14490 | { | |
14491 | switch (cu_header->addr_size) | |
14492 | { | |
14493 | case 2: | |
fe1b8b76 | 14494 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
14495 | break; |
14496 | case 4: | |
fe1b8b76 | 14497 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
14498 | break; |
14499 | case 8: | |
fe1b8b76 | 14500 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
14501 | break; |
14502 | default: | |
8e65ff28 | 14503 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
14504 | _("read_address: bad switch, " |
14505 | "unsigned [in module %s]"), | |
659b0389 | 14506 | bfd_get_filename (abfd)); |
107d2387 | 14507 | } |
c906108c | 14508 | } |
64367e0a | 14509 | |
107d2387 AC |
14510 | *bytes_read = cu_header->addr_size; |
14511 | return retval; | |
c906108c SS |
14512 | } |
14513 | ||
f7ef9339 | 14514 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
14515 | specification allows the initial length to take up either 4 bytes |
14516 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
14517 | bytes describe the length and all offsets will be 8 bytes in length | |
14518 | instead of 4. | |
14519 | ||
f7ef9339 KB |
14520 | An older, non-standard 64-bit format is also handled by this |
14521 | function. The older format in question stores the initial length | |
14522 | as an 8-byte quantity without an escape value. Lengths greater | |
14523 | than 2^32 aren't very common which means that the initial 4 bytes | |
14524 | is almost always zero. Since a length value of zero doesn't make | |
14525 | sense for the 32-bit format, this initial zero can be considered to | |
14526 | be an escape value which indicates the presence of the older 64-bit | |
14527 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
14528 | greater than 4GB. If it becomes necessary to handle lengths |
14529 | somewhat larger than 4GB, we could allow other small values (such | |
14530 | as the non-sensical values of 1, 2, and 3) to also be used as | |
14531 | escape values indicating the presence of the old format. | |
f7ef9339 | 14532 | |
917c78fc MK |
14533 | The value returned via bytes_read should be used to increment the |
14534 | relevant pointer after calling read_initial_length(). | |
c764a876 | 14535 | |
613e1657 KB |
14536 | [ Note: read_initial_length() and read_offset() are based on the |
14537 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 14538 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
14539 | from: |
14540 | ||
f7ef9339 | 14541 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 14542 | |
613e1657 KB |
14543 | This document is only a draft and is subject to change. (So beware.) |
14544 | ||
f7ef9339 | 14545 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
14546 | determined empirically by examining 64-bit ELF files produced by |
14547 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
14548 | |
14549 | - Kevin, July 16, 2002 | |
613e1657 KB |
14550 | ] */ |
14551 | ||
14552 | static LONGEST | |
d521ce57 | 14553 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 14554 | { |
fe1b8b76 | 14555 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 14556 | |
dd373385 | 14557 | if (length == 0xffffffff) |
613e1657 | 14558 | { |
fe1b8b76 | 14559 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 14560 | *bytes_read = 12; |
613e1657 | 14561 | } |
dd373385 | 14562 | else if (length == 0) |
f7ef9339 | 14563 | { |
dd373385 | 14564 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 14565 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 14566 | *bytes_read = 8; |
f7ef9339 | 14567 | } |
613e1657 KB |
14568 | else |
14569 | { | |
14570 | *bytes_read = 4; | |
613e1657 KB |
14571 | } |
14572 | ||
c764a876 DE |
14573 | return length; |
14574 | } | |
dd373385 | 14575 | |
c764a876 DE |
14576 | /* Cover function for read_initial_length. |
14577 | Returns the length of the object at BUF, and stores the size of the | |
14578 | initial length in *BYTES_READ and stores the size that offsets will be in | |
14579 | *OFFSET_SIZE. | |
14580 | If the initial length size is not equivalent to that specified in | |
14581 | CU_HEADER then issue a complaint. | |
14582 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 14583 | |
c764a876 | 14584 | static LONGEST |
d521ce57 | 14585 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
14586 | const struct comp_unit_head *cu_header, |
14587 | unsigned int *bytes_read, | |
14588 | unsigned int *offset_size) | |
14589 | { | |
14590 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
14591 | ||
14592 | gdb_assert (cu_header->initial_length_size == 4 | |
14593 | || cu_header->initial_length_size == 8 | |
14594 | || cu_header->initial_length_size == 12); | |
14595 | ||
14596 | if (cu_header->initial_length_size != *bytes_read) | |
14597 | complaint (&symfile_complaints, | |
14598 | _("intermixed 32-bit and 64-bit DWARF sections")); | |
dd373385 | 14599 | |
c764a876 | 14600 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 14601 | return length; |
613e1657 KB |
14602 | } |
14603 | ||
14604 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 14605 | given by cu_header->offset_size. */ |
613e1657 KB |
14606 | |
14607 | static LONGEST | |
d521ce57 TT |
14608 | read_offset (bfd *abfd, const gdb_byte *buf, |
14609 | const struct comp_unit_head *cu_header, | |
891d2f0b | 14610 | unsigned int *bytes_read) |
c764a876 DE |
14611 | { |
14612 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 14613 | |
c764a876 DE |
14614 | *bytes_read = cu_header->offset_size; |
14615 | return offset; | |
14616 | } | |
14617 | ||
14618 | /* Read an offset from the data stream. */ | |
14619 | ||
14620 | static LONGEST | |
d521ce57 | 14621 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
14622 | { |
14623 | LONGEST retval = 0; | |
14624 | ||
c764a876 | 14625 | switch (offset_size) |
613e1657 KB |
14626 | { |
14627 | case 4: | |
fe1b8b76 | 14628 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
14629 | break; |
14630 | case 8: | |
fe1b8b76 | 14631 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
14632 | break; |
14633 | default: | |
8e65ff28 | 14634 | internal_error (__FILE__, __LINE__, |
c764a876 | 14635 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 14636 | bfd_get_filename (abfd)); |
613e1657 KB |
14637 | } |
14638 | ||
917c78fc | 14639 | return retval; |
613e1657 KB |
14640 | } |
14641 | ||
d521ce57 TT |
14642 | static const gdb_byte * |
14643 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
14644 | { |
14645 | /* If the size of a host char is 8 bits, we can return a pointer | |
14646 | to the buffer, otherwise we have to copy the data to a buffer | |
14647 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14648 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 14649 | return buf; |
c906108c SS |
14650 | } |
14651 | ||
d521ce57 TT |
14652 | static const char * |
14653 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
14654 | unsigned int *bytes_read_ptr) | |
c906108c SS |
14655 | { |
14656 | /* If the size of a host char is 8 bits, we can return a pointer | |
14657 | to the string, otherwise we have to copy the string to a buffer | |
14658 | allocated on the temporary obstack. */ | |
4bdf3d34 | 14659 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
14660 | if (*buf == '\0') |
14661 | { | |
14662 | *bytes_read_ptr = 1; | |
14663 | return NULL; | |
14664 | } | |
d521ce57 TT |
14665 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
14666 | return (const char *) buf; | |
4bdf3d34 JJ |
14667 | } |
14668 | ||
d521ce57 | 14669 | static const char * |
cf2c3c16 | 14670 | read_indirect_string_at_offset (bfd *abfd, LONGEST str_offset) |
4bdf3d34 | 14671 | { |
be391dca | 14672 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwarf2_per_objfile->str); |
dce234bc | 14673 | if (dwarf2_per_objfile->str.buffer == NULL) |
cf2c3c16 TT |
14674 | error (_("DW_FORM_strp used without .debug_str section [in module %s]"), |
14675 | bfd_get_filename (abfd)); | |
dce234bc | 14676 | if (str_offset >= dwarf2_per_objfile->str.size) |
cf2c3c16 TT |
14677 | error (_("DW_FORM_strp pointing outside of " |
14678 | ".debug_str section [in module %s]"), | |
14679 | bfd_get_filename (abfd)); | |
4bdf3d34 | 14680 | gdb_assert (HOST_CHAR_BIT == 8); |
dce234bc | 14681 | if (dwarf2_per_objfile->str.buffer[str_offset] == '\0') |
4bdf3d34 | 14682 | return NULL; |
d521ce57 | 14683 | return (const char *) (dwarf2_per_objfile->str.buffer + str_offset); |
c906108c SS |
14684 | } |
14685 | ||
36586728 TT |
14686 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
14687 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
14688 | the string consists of a single NUL byte, return NULL; otherwise | |
14689 | return a pointer to the string. */ | |
14690 | ||
d521ce57 | 14691 | static const char * |
36586728 TT |
14692 | read_indirect_string_from_dwz (struct dwz_file *dwz, LONGEST str_offset) |
14693 | { | |
14694 | dwarf2_read_section (dwarf2_per_objfile->objfile, &dwz->str); | |
14695 | ||
14696 | if (dwz->str.buffer == NULL) | |
14697 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
14698 | "section [in module %s]"), | |
14699 | bfd_get_filename (dwz->dwz_bfd)); | |
14700 | if (str_offset >= dwz->str.size) | |
14701 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
14702 | ".debug_str section [in module %s]"), | |
14703 | bfd_get_filename (dwz->dwz_bfd)); | |
14704 | gdb_assert (HOST_CHAR_BIT == 8); | |
14705 | if (dwz->str.buffer[str_offset] == '\0') | |
14706 | return NULL; | |
d521ce57 | 14707 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
14708 | } |
14709 | ||
d521ce57 TT |
14710 | static const char * |
14711 | read_indirect_string (bfd *abfd, const gdb_byte *buf, | |
cf2c3c16 TT |
14712 | const struct comp_unit_head *cu_header, |
14713 | unsigned int *bytes_read_ptr) | |
14714 | { | |
14715 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
14716 | ||
14717 | return read_indirect_string_at_offset (abfd, str_offset); | |
14718 | } | |
14719 | ||
12df843f | 14720 | static ULONGEST |
d521ce57 TT |
14721 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
14722 | unsigned int *bytes_read_ptr) | |
c906108c | 14723 | { |
12df843f | 14724 | ULONGEST result; |
ce5d95e1 | 14725 | unsigned int num_read; |
c906108c SS |
14726 | int i, shift; |
14727 | unsigned char byte; | |
14728 | ||
14729 | result = 0; | |
14730 | shift = 0; | |
14731 | num_read = 0; | |
14732 | i = 0; | |
14733 | while (1) | |
14734 | { | |
fe1b8b76 | 14735 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14736 | buf++; |
14737 | num_read++; | |
12df843f | 14738 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
14739 | if ((byte & 128) == 0) |
14740 | { | |
14741 | break; | |
14742 | } | |
14743 | shift += 7; | |
14744 | } | |
14745 | *bytes_read_ptr = num_read; | |
14746 | return result; | |
14747 | } | |
14748 | ||
12df843f | 14749 | static LONGEST |
d521ce57 TT |
14750 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
14751 | unsigned int *bytes_read_ptr) | |
c906108c | 14752 | { |
12df843f | 14753 | LONGEST result; |
77e0b926 | 14754 | int i, shift, num_read; |
c906108c SS |
14755 | unsigned char byte; |
14756 | ||
14757 | result = 0; | |
14758 | shift = 0; | |
c906108c SS |
14759 | num_read = 0; |
14760 | i = 0; | |
14761 | while (1) | |
14762 | { | |
fe1b8b76 | 14763 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
14764 | buf++; |
14765 | num_read++; | |
12df843f | 14766 | result |= ((LONGEST) (byte & 127) << shift); |
c906108c SS |
14767 | shift += 7; |
14768 | if ((byte & 128) == 0) | |
14769 | { | |
14770 | break; | |
14771 | } | |
14772 | } | |
77e0b926 | 14773 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
12df843f | 14774 | result |= -(((LONGEST) 1) << shift); |
c906108c SS |
14775 | *bytes_read_ptr = num_read; |
14776 | return result; | |
14777 | } | |
14778 | ||
3019eac3 DE |
14779 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
14780 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
14781 | ADDR_SIZE is the size of addresses from the CU header. */ | |
14782 | ||
14783 | static CORE_ADDR | |
14784 | read_addr_index_1 (unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
14785 | { | |
14786 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14787 | bfd *abfd = objfile->obfd; | |
14788 | const gdb_byte *info_ptr; | |
14789 | ||
14790 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
14791 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
14792 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
14793 | objfile->name); | |
14794 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) | |
14795 | error (_("DW_FORM_addr_index pointing outside of " | |
14796 | ".debug_addr section [in module %s]"), | |
14797 | objfile->name); | |
14798 | info_ptr = (dwarf2_per_objfile->addr.buffer | |
14799 | + addr_base + addr_index * addr_size); | |
14800 | if (addr_size == 4) | |
14801 | return bfd_get_32 (abfd, info_ptr); | |
14802 | else | |
14803 | return bfd_get_64 (abfd, info_ptr); | |
14804 | } | |
14805 | ||
14806 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
14807 | ||
14808 | static CORE_ADDR | |
14809 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
14810 | { | |
14811 | return read_addr_index_1 (addr_index, cu->addr_base, cu->header.addr_size); | |
14812 | } | |
14813 | ||
14814 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
14815 | ||
14816 | static CORE_ADDR | |
d521ce57 | 14817 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
14818 | unsigned int *bytes_read) |
14819 | { | |
14820 | bfd *abfd = cu->objfile->obfd; | |
14821 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
14822 | ||
14823 | return read_addr_index (cu, addr_index); | |
14824 | } | |
14825 | ||
14826 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
14827 | back to dwarf2_read_addr_index. */ | |
14828 | ||
14829 | struct dwarf2_read_addr_index_data | |
14830 | { | |
14831 | ULONGEST addr_base; | |
14832 | int addr_size; | |
14833 | }; | |
14834 | ||
14835 | /* die_reader_func for dwarf2_read_addr_index. */ | |
14836 | ||
14837 | static void | |
14838 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 14839 | const gdb_byte *info_ptr, |
3019eac3 DE |
14840 | struct die_info *comp_unit_die, |
14841 | int has_children, | |
14842 | void *data) | |
14843 | { | |
14844 | struct dwarf2_cu *cu = reader->cu; | |
14845 | struct dwarf2_read_addr_index_data *aidata = | |
14846 | (struct dwarf2_read_addr_index_data *) data; | |
14847 | ||
14848 | aidata->addr_base = cu->addr_base; | |
14849 | aidata->addr_size = cu->header.addr_size; | |
14850 | } | |
14851 | ||
14852 | /* Given an index in .debug_addr, fetch the value. | |
14853 | NOTE: This can be called during dwarf expression evaluation, | |
14854 | long after the debug information has been read, and thus per_cu->cu | |
14855 | may no longer exist. */ | |
14856 | ||
14857 | CORE_ADDR | |
14858 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
14859 | unsigned int addr_index) | |
14860 | { | |
14861 | struct objfile *objfile = per_cu->objfile; | |
14862 | struct dwarf2_cu *cu = per_cu->cu; | |
14863 | ULONGEST addr_base; | |
14864 | int addr_size; | |
14865 | ||
14866 | /* This is intended to be called from outside this file. */ | |
14867 | dw2_setup (objfile); | |
14868 | ||
14869 | /* We need addr_base and addr_size. | |
14870 | If we don't have PER_CU->cu, we have to get it. | |
14871 | Nasty, but the alternative is storing the needed info in PER_CU, | |
14872 | which at this point doesn't seem justified: it's not clear how frequently | |
14873 | it would get used and it would increase the size of every PER_CU. | |
14874 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
14875 | so we're not in uncharted territory here. | |
14876 | Alas we need to be a bit more complicated as addr_base is contained | |
14877 | in the DIE. | |
14878 | ||
14879 | We don't need to read the entire CU(/TU). | |
14880 | We just need the header and top level die. | |
a1b64ce1 | 14881 | |
3019eac3 | 14882 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 14883 | For now we skip this optimization. */ |
3019eac3 DE |
14884 | |
14885 | if (cu != NULL) | |
14886 | { | |
14887 | addr_base = cu->addr_base; | |
14888 | addr_size = cu->header.addr_size; | |
14889 | } | |
14890 | else | |
14891 | { | |
14892 | struct dwarf2_read_addr_index_data aidata; | |
14893 | ||
a1b64ce1 DE |
14894 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
14895 | we need addr_base. */ | |
14896 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, | |
14897 | dwarf2_read_addr_index_reader, &aidata); | |
3019eac3 DE |
14898 | addr_base = aidata.addr_base; |
14899 | addr_size = aidata.addr_size; | |
14900 | } | |
14901 | ||
14902 | return read_addr_index_1 (addr_index, addr_base, addr_size); | |
14903 | } | |
14904 | ||
14905 | /* Given a DW_AT_str_index, fetch the string. */ | |
14906 | ||
d521ce57 | 14907 | static const char * |
3019eac3 DE |
14908 | read_str_index (const struct die_reader_specs *reader, |
14909 | struct dwarf2_cu *cu, ULONGEST str_index) | |
14910 | { | |
14911 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
14912 | const char *dwo_name = objfile->name; | |
14913 | bfd *abfd = objfile->obfd; | |
14914 | struct dwo_sections *sections = &reader->dwo_file->sections; | |
d521ce57 | 14915 | const gdb_byte *info_ptr; |
3019eac3 DE |
14916 | ULONGEST str_offset; |
14917 | ||
14918 | dwarf2_read_section (objfile, §ions->str); | |
14919 | dwarf2_read_section (objfile, §ions->str_offsets); | |
14920 | if (sections->str.buffer == NULL) | |
14921 | error (_("DW_FORM_str_index used without .debug_str.dwo section" | |
14922 | " in CU at offset 0x%lx [in module %s]"), | |
14923 | (long) cu->header.offset.sect_off, dwo_name); | |
14924 | if (sections->str_offsets.buffer == NULL) | |
14925 | error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section" | |
14926 | " in CU at offset 0x%lx [in module %s]"), | |
14927 | (long) cu->header.offset.sect_off, dwo_name); | |
14928 | if (str_index * cu->header.offset_size >= sections->str_offsets.size) | |
14929 | error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo" | |
14930 | " section in CU at offset 0x%lx [in module %s]"), | |
14931 | (long) cu->header.offset.sect_off, dwo_name); | |
14932 | info_ptr = (sections->str_offsets.buffer | |
14933 | + str_index * cu->header.offset_size); | |
14934 | if (cu->header.offset_size == 4) | |
14935 | str_offset = bfd_get_32 (abfd, info_ptr); | |
14936 | else | |
14937 | str_offset = bfd_get_64 (abfd, info_ptr); | |
14938 | if (str_offset >= sections->str.size) | |
14939 | error (_("Offset from DW_FORM_str_index pointing outside of" | |
14940 | " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"), | |
14941 | (long) cu->header.offset.sect_off, dwo_name); | |
d521ce57 | 14942 | return (const char *) (sections->str.buffer + str_offset); |
3019eac3 DE |
14943 | } |
14944 | ||
3019eac3 DE |
14945 | /* Return the length of an LEB128 number in BUF. */ |
14946 | ||
14947 | static int | |
14948 | leb128_size (const gdb_byte *buf) | |
14949 | { | |
14950 | const gdb_byte *begin = buf; | |
14951 | gdb_byte byte; | |
14952 | ||
14953 | while (1) | |
14954 | { | |
14955 | byte = *buf++; | |
14956 | if ((byte & 128) == 0) | |
14957 | return buf - begin; | |
14958 | } | |
14959 | } | |
14960 | ||
c906108c | 14961 | static void |
e142c38c | 14962 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
14963 | { |
14964 | switch (lang) | |
14965 | { | |
14966 | case DW_LANG_C89: | |
76bee0cc | 14967 | case DW_LANG_C99: |
c906108c | 14968 | case DW_LANG_C: |
e142c38c | 14969 | cu->language = language_c; |
c906108c SS |
14970 | break; |
14971 | case DW_LANG_C_plus_plus: | |
e142c38c | 14972 | cu->language = language_cplus; |
c906108c | 14973 | break; |
6aecb9c2 JB |
14974 | case DW_LANG_D: |
14975 | cu->language = language_d; | |
14976 | break; | |
c906108c SS |
14977 | case DW_LANG_Fortran77: |
14978 | case DW_LANG_Fortran90: | |
b21b22e0 | 14979 | case DW_LANG_Fortran95: |
e142c38c | 14980 | cu->language = language_fortran; |
c906108c | 14981 | break; |
a766d390 DE |
14982 | case DW_LANG_Go: |
14983 | cu->language = language_go; | |
14984 | break; | |
c906108c | 14985 | case DW_LANG_Mips_Assembler: |
e142c38c | 14986 | cu->language = language_asm; |
c906108c | 14987 | break; |
bebd888e | 14988 | case DW_LANG_Java: |
e142c38c | 14989 | cu->language = language_java; |
bebd888e | 14990 | break; |
c906108c | 14991 | case DW_LANG_Ada83: |
8aaf0b47 | 14992 | case DW_LANG_Ada95: |
bc5f45f8 JB |
14993 | cu->language = language_ada; |
14994 | break; | |
72019c9c GM |
14995 | case DW_LANG_Modula2: |
14996 | cu->language = language_m2; | |
14997 | break; | |
fe8e67fd PM |
14998 | case DW_LANG_Pascal83: |
14999 | cu->language = language_pascal; | |
15000 | break; | |
22566fbd DJ |
15001 | case DW_LANG_ObjC: |
15002 | cu->language = language_objc; | |
15003 | break; | |
c906108c SS |
15004 | case DW_LANG_Cobol74: |
15005 | case DW_LANG_Cobol85: | |
c906108c | 15006 | default: |
e142c38c | 15007 | cu->language = language_minimal; |
c906108c SS |
15008 | break; |
15009 | } | |
e142c38c | 15010 | cu->language_defn = language_def (cu->language); |
c906108c SS |
15011 | } |
15012 | ||
15013 | /* Return the named attribute or NULL if not there. */ | |
15014 | ||
15015 | static struct attribute * | |
e142c38c | 15016 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 15017 | { |
a48e046c | 15018 | for (;;) |
c906108c | 15019 | { |
a48e046c TT |
15020 | unsigned int i; |
15021 | struct attribute *spec = NULL; | |
15022 | ||
15023 | for (i = 0; i < die->num_attrs; ++i) | |
15024 | { | |
15025 | if (die->attrs[i].name == name) | |
15026 | return &die->attrs[i]; | |
15027 | if (die->attrs[i].name == DW_AT_specification | |
15028 | || die->attrs[i].name == DW_AT_abstract_origin) | |
15029 | spec = &die->attrs[i]; | |
15030 | } | |
15031 | ||
15032 | if (!spec) | |
15033 | break; | |
c906108c | 15034 | |
f2f0e013 | 15035 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 15036 | } |
c5aa993b | 15037 | |
c906108c SS |
15038 | return NULL; |
15039 | } | |
15040 | ||
348e048f DE |
15041 | /* Return the named attribute or NULL if not there, |
15042 | but do not follow DW_AT_specification, etc. | |
15043 | This is for use in contexts where we're reading .debug_types dies. | |
15044 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
15045 | back up the chain, and we want to go down. */ | |
15046 | ||
15047 | static struct attribute * | |
45e58e77 | 15048 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
15049 | { |
15050 | unsigned int i; | |
15051 | ||
15052 | for (i = 0; i < die->num_attrs; ++i) | |
15053 | if (die->attrs[i].name == name) | |
15054 | return &die->attrs[i]; | |
15055 | ||
15056 | return NULL; | |
15057 | } | |
15058 | ||
05cf31d1 JB |
15059 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
15060 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 15061 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
15062 | |
15063 | static int | |
15064 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
15065 | { | |
15066 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
15067 | ||
15068 | return (attr && DW_UNSND (attr)); | |
15069 | } | |
15070 | ||
3ca72b44 | 15071 | static int |
e142c38c | 15072 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 15073 | { |
05cf31d1 JB |
15074 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
15075 | which value is non-zero. However, we have to be careful with | |
15076 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
15077 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
15078 | end up accidently finding a declaration attribute that belongs | |
15079 | to a different DIE referenced by the specification attribute, | |
15080 | even though the given DIE does not have a declaration attribute. */ | |
15081 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
15082 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
15083 | } |
15084 | ||
63d06c5c | 15085 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 15086 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
15087 | containing the return value on output. If there is no |
15088 | specification, but there is an abstract origin, that is | |
15089 | returned. */ | |
63d06c5c DC |
15090 | |
15091 | static struct die_info * | |
f2f0e013 | 15092 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 15093 | { |
f2f0e013 DJ |
15094 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
15095 | *spec_cu); | |
63d06c5c | 15096 | |
edb3359d DJ |
15097 | if (spec_attr == NULL) |
15098 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
15099 | ||
63d06c5c DC |
15100 | if (spec_attr == NULL) |
15101 | return NULL; | |
15102 | else | |
f2f0e013 | 15103 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 15104 | } |
c906108c | 15105 | |
debd256d | 15106 | /* Free the line_header structure *LH, and any arrays and strings it |
ae2de4f8 DE |
15107 | refers to. |
15108 | NOTE: This is also used as a "cleanup" function. */ | |
15109 | ||
debd256d JB |
15110 | static void |
15111 | free_line_header (struct line_header *lh) | |
15112 | { | |
15113 | if (lh->standard_opcode_lengths) | |
a8bc7b56 | 15114 | xfree (lh->standard_opcode_lengths); |
debd256d JB |
15115 | |
15116 | /* Remember that all the lh->file_names[i].name pointers are | |
15117 | pointers into debug_line_buffer, and don't need to be freed. */ | |
15118 | if (lh->file_names) | |
a8bc7b56 | 15119 | xfree (lh->file_names); |
debd256d JB |
15120 | |
15121 | /* Similarly for the include directory names. */ | |
15122 | if (lh->include_dirs) | |
a8bc7b56 | 15123 | xfree (lh->include_dirs); |
debd256d | 15124 | |
a8bc7b56 | 15125 | xfree (lh); |
debd256d JB |
15126 | } |
15127 | ||
debd256d | 15128 | /* Add an entry to LH's include directory table. */ |
ae2de4f8 | 15129 | |
debd256d | 15130 | static void |
d521ce57 | 15131 | add_include_dir (struct line_header *lh, const char *include_dir) |
c906108c | 15132 | { |
debd256d JB |
15133 | /* Grow the array if necessary. */ |
15134 | if (lh->include_dirs_size == 0) | |
c5aa993b | 15135 | { |
debd256d JB |
15136 | lh->include_dirs_size = 1; /* for testing */ |
15137 | lh->include_dirs = xmalloc (lh->include_dirs_size | |
15138 | * sizeof (*lh->include_dirs)); | |
15139 | } | |
15140 | else if (lh->num_include_dirs >= lh->include_dirs_size) | |
15141 | { | |
15142 | lh->include_dirs_size *= 2; | |
15143 | lh->include_dirs = xrealloc (lh->include_dirs, | |
15144 | (lh->include_dirs_size | |
15145 | * sizeof (*lh->include_dirs))); | |
c5aa993b | 15146 | } |
c906108c | 15147 | |
debd256d JB |
15148 | lh->include_dirs[lh->num_include_dirs++] = include_dir; |
15149 | } | |
6e70227d | 15150 | |
debd256d | 15151 | /* Add an entry to LH's file name table. */ |
ae2de4f8 | 15152 | |
debd256d JB |
15153 | static void |
15154 | add_file_name (struct line_header *lh, | |
d521ce57 | 15155 | const char *name, |
debd256d JB |
15156 | unsigned int dir_index, |
15157 | unsigned int mod_time, | |
15158 | unsigned int length) | |
15159 | { | |
15160 | struct file_entry *fe; | |
15161 | ||
15162 | /* Grow the array if necessary. */ | |
15163 | if (lh->file_names_size == 0) | |
15164 | { | |
15165 | lh->file_names_size = 1; /* for testing */ | |
15166 | lh->file_names = xmalloc (lh->file_names_size | |
15167 | * sizeof (*lh->file_names)); | |
15168 | } | |
15169 | else if (lh->num_file_names >= lh->file_names_size) | |
15170 | { | |
15171 | lh->file_names_size *= 2; | |
15172 | lh->file_names = xrealloc (lh->file_names, | |
15173 | (lh->file_names_size | |
15174 | * sizeof (*lh->file_names))); | |
15175 | } | |
15176 | ||
15177 | fe = &lh->file_names[lh->num_file_names++]; | |
15178 | fe->name = name; | |
15179 | fe->dir_index = dir_index; | |
15180 | fe->mod_time = mod_time; | |
15181 | fe->length = length; | |
aaa75496 | 15182 | fe->included_p = 0; |
cb1df416 | 15183 | fe->symtab = NULL; |
debd256d | 15184 | } |
6e70227d | 15185 | |
36586728 TT |
15186 | /* A convenience function to find the proper .debug_line section for a |
15187 | CU. */ | |
15188 | ||
15189 | static struct dwarf2_section_info * | |
15190 | get_debug_line_section (struct dwarf2_cu *cu) | |
15191 | { | |
15192 | struct dwarf2_section_info *section; | |
15193 | ||
15194 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
15195 | DWO file. */ | |
15196 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
15197 | section = &cu->dwo_unit->dwo_file->sections.line; | |
15198 | else if (cu->per_cu->is_dwz) | |
15199 | { | |
15200 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
15201 | ||
15202 | section = &dwz->line; | |
15203 | } | |
15204 | else | |
15205 | section = &dwarf2_per_objfile->line; | |
15206 | ||
15207 | return section; | |
15208 | } | |
15209 | ||
debd256d | 15210 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 15211 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 15212 | to a struct line_header, allocated using xmalloc. |
debd256d JB |
15213 | |
15214 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
15215 | the returned object point into the dwarf line section buffer, |
15216 | and must not be freed. */ | |
ae2de4f8 | 15217 | |
debd256d | 15218 | static struct line_header * |
3019eac3 | 15219 | dwarf_decode_line_header (unsigned int offset, struct dwarf2_cu *cu) |
debd256d JB |
15220 | { |
15221 | struct cleanup *back_to; | |
15222 | struct line_header *lh; | |
d521ce57 | 15223 | const gdb_byte *line_ptr; |
c764a876 | 15224 | unsigned int bytes_read, offset_size; |
debd256d | 15225 | int i; |
d521ce57 | 15226 | const char *cur_dir, *cur_file; |
3019eac3 DE |
15227 | struct dwarf2_section_info *section; |
15228 | bfd *abfd; | |
15229 | ||
36586728 | 15230 | section = get_debug_line_section (cu); |
3019eac3 DE |
15231 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
15232 | if (section->buffer == NULL) | |
debd256d | 15233 | { |
3019eac3 DE |
15234 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
15235 | complaint (&symfile_complaints, _("missing .debug_line.dwo section")); | |
15236 | else | |
15237 | complaint (&symfile_complaints, _("missing .debug_line section")); | |
debd256d JB |
15238 | return 0; |
15239 | } | |
15240 | ||
fceca515 DE |
15241 | /* We can't do this until we know the section is non-empty. |
15242 | Only then do we know we have such a section. */ | |
15243 | abfd = section->asection->owner; | |
15244 | ||
a738430d MK |
15245 | /* Make sure that at least there's room for the total_length field. |
15246 | That could be 12 bytes long, but we're just going to fudge that. */ | |
3019eac3 | 15247 | if (offset + 4 >= section->size) |
debd256d | 15248 | { |
4d3c2250 | 15249 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
15250 | return 0; |
15251 | } | |
15252 | ||
15253 | lh = xmalloc (sizeof (*lh)); | |
15254 | memset (lh, 0, sizeof (*lh)); | |
15255 | back_to = make_cleanup ((make_cleanup_ftype *) free_line_header, | |
15256 | (void *) lh); | |
15257 | ||
3019eac3 | 15258 | line_ptr = section->buffer + offset; |
debd256d | 15259 | |
a738430d | 15260 | /* Read in the header. */ |
6e70227d | 15261 | lh->total_length = |
c764a876 DE |
15262 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
15263 | &bytes_read, &offset_size); | |
debd256d | 15264 | line_ptr += bytes_read; |
3019eac3 | 15265 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 15266 | { |
4d3c2250 | 15267 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
15268 | return 0; |
15269 | } | |
15270 | lh->statement_program_end = line_ptr + lh->total_length; | |
15271 | lh->version = read_2_bytes (abfd, line_ptr); | |
15272 | line_ptr += 2; | |
c764a876 DE |
15273 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
15274 | line_ptr += offset_size; | |
debd256d JB |
15275 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
15276 | line_ptr += 1; | |
2dc7f7b3 TT |
15277 | if (lh->version >= 4) |
15278 | { | |
15279 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
15280 | line_ptr += 1; | |
15281 | } | |
15282 | else | |
15283 | lh->maximum_ops_per_instruction = 1; | |
15284 | ||
15285 | if (lh->maximum_ops_per_instruction == 0) | |
15286 | { | |
15287 | lh->maximum_ops_per_instruction = 1; | |
15288 | complaint (&symfile_complaints, | |
3e43a32a MS |
15289 | _("invalid maximum_ops_per_instruction " |
15290 | "in `.debug_line' section")); | |
2dc7f7b3 TT |
15291 | } |
15292 | ||
debd256d JB |
15293 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
15294 | line_ptr += 1; | |
15295 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
15296 | line_ptr += 1; | |
15297 | lh->line_range = read_1_byte (abfd, line_ptr); | |
15298 | line_ptr += 1; | |
15299 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
15300 | line_ptr += 1; | |
15301 | lh->standard_opcode_lengths | |
fe1b8b76 | 15302 | = xmalloc (lh->opcode_base * sizeof (lh->standard_opcode_lengths[0])); |
debd256d JB |
15303 | |
15304 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
15305 | for (i = 1; i < lh->opcode_base; ++i) | |
15306 | { | |
15307 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
15308 | line_ptr += 1; | |
15309 | } | |
15310 | ||
a738430d | 15311 | /* Read directory table. */ |
9b1c24c8 | 15312 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15313 | { |
15314 | line_ptr += bytes_read; | |
15315 | add_include_dir (lh, cur_dir); | |
15316 | } | |
15317 | line_ptr += bytes_read; | |
15318 | ||
a738430d | 15319 | /* Read file name table. */ |
9b1c24c8 | 15320 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) |
debd256d JB |
15321 | { |
15322 | unsigned int dir_index, mod_time, length; | |
15323 | ||
15324 | line_ptr += bytes_read; | |
15325 | dir_index = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15326 | line_ptr += bytes_read; | |
15327 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15328 | line_ptr += bytes_read; | |
15329 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15330 | line_ptr += bytes_read; | |
15331 | ||
15332 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15333 | } | |
15334 | line_ptr += bytes_read; | |
6e70227d | 15335 | lh->statement_program_start = line_ptr; |
debd256d | 15336 | |
3019eac3 | 15337 | if (line_ptr > (section->buffer + section->size)) |
4d3c2250 | 15338 | complaint (&symfile_complaints, |
3e43a32a MS |
15339 | _("line number info header doesn't " |
15340 | "fit in `.debug_line' section")); | |
debd256d JB |
15341 | |
15342 | discard_cleanups (back_to); | |
15343 | return lh; | |
15344 | } | |
c906108c | 15345 | |
c6da4cef DE |
15346 | /* Subroutine of dwarf_decode_lines to simplify it. |
15347 | Return the file name of the psymtab for included file FILE_INDEX | |
15348 | in line header LH of PST. | |
15349 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15350 | If space for the result is malloc'd, it will be freed by a cleanup. | |
1ed59174 JK |
15351 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. |
15352 | ||
15353 | The function creates dangling cleanup registration. */ | |
c6da4cef | 15354 | |
d521ce57 | 15355 | static const char * |
c6da4cef DE |
15356 | psymtab_include_file_name (const struct line_header *lh, int file_index, |
15357 | const struct partial_symtab *pst, | |
15358 | const char *comp_dir) | |
15359 | { | |
15360 | const struct file_entry fe = lh->file_names [file_index]; | |
d521ce57 TT |
15361 | const char *include_name = fe.name; |
15362 | const char *include_name_to_compare = include_name; | |
15363 | const char *dir_name = NULL; | |
72b9f47f TT |
15364 | const char *pst_filename; |
15365 | char *copied_name = NULL; | |
c6da4cef DE |
15366 | int file_is_pst; |
15367 | ||
15368 | if (fe.dir_index) | |
15369 | dir_name = lh->include_dirs[fe.dir_index - 1]; | |
15370 | ||
15371 | if (!IS_ABSOLUTE_PATH (include_name) | |
15372 | && (dir_name != NULL || comp_dir != NULL)) | |
15373 | { | |
15374 | /* Avoid creating a duplicate psymtab for PST. | |
15375 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
15376 | Before we do the comparison, however, we need to account | |
15377 | for DIR_NAME and COMP_DIR. | |
15378 | First prepend dir_name (if non-NULL). If we still don't | |
15379 | have an absolute path prepend comp_dir (if non-NULL). | |
15380 | However, the directory we record in the include-file's | |
15381 | psymtab does not contain COMP_DIR (to match the | |
15382 | corresponding symtab(s)). | |
15383 | ||
15384 | Example: | |
15385 | ||
15386 | bash$ cd /tmp | |
15387 | bash$ gcc -g ./hello.c | |
15388 | include_name = "hello.c" | |
15389 | dir_name = "." | |
15390 | DW_AT_comp_dir = comp_dir = "/tmp" | |
15391 | DW_AT_name = "./hello.c" */ | |
15392 | ||
15393 | if (dir_name != NULL) | |
15394 | { | |
d521ce57 TT |
15395 | char *tem = concat (dir_name, SLASH_STRING, |
15396 | include_name, (char *)NULL); | |
15397 | ||
15398 | make_cleanup (xfree, tem); | |
15399 | include_name = tem; | |
c6da4cef | 15400 | include_name_to_compare = include_name; |
c6da4cef DE |
15401 | } |
15402 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
15403 | { | |
d521ce57 TT |
15404 | char *tem = concat (comp_dir, SLASH_STRING, |
15405 | include_name, (char *)NULL); | |
15406 | ||
15407 | make_cleanup (xfree, tem); | |
15408 | include_name_to_compare = tem; | |
c6da4cef DE |
15409 | } |
15410 | } | |
15411 | ||
15412 | pst_filename = pst->filename; | |
15413 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) | |
15414 | { | |
72b9f47f TT |
15415 | copied_name = concat (pst->dirname, SLASH_STRING, |
15416 | pst_filename, (char *)NULL); | |
15417 | pst_filename = copied_name; | |
c6da4cef DE |
15418 | } |
15419 | ||
1e3fad37 | 15420 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 15421 | |
72b9f47f TT |
15422 | if (copied_name != NULL) |
15423 | xfree (copied_name); | |
c6da4cef DE |
15424 | |
15425 | if (file_is_pst) | |
15426 | return NULL; | |
15427 | return include_name; | |
15428 | } | |
15429 | ||
c91513d8 PP |
15430 | /* Ignore this record_line request. */ |
15431 | ||
15432 | static void | |
15433 | noop_record_line (struct subfile *subfile, int line, CORE_ADDR pc) | |
15434 | { | |
15435 | return; | |
15436 | } | |
15437 | ||
f3f5162e DE |
15438 | /* Subroutine of dwarf_decode_lines to simplify it. |
15439 | Process the line number information in LH. */ | |
debd256d | 15440 | |
c906108c | 15441 | static void |
f3f5162e DE |
15442 | dwarf_decode_lines_1 (struct line_header *lh, const char *comp_dir, |
15443 | struct dwarf2_cu *cu, struct partial_symtab *pst) | |
c906108c | 15444 | { |
d521ce57 TT |
15445 | const gdb_byte *line_ptr, *extended_end; |
15446 | const gdb_byte *line_end; | |
a8c50c1f | 15447 | unsigned int bytes_read, extended_len; |
c906108c | 15448 | unsigned char op_code, extended_op, adj_opcode; |
e142c38c DJ |
15449 | CORE_ADDR baseaddr; |
15450 | struct objfile *objfile = cu->objfile; | |
f3f5162e | 15451 | bfd *abfd = objfile->obfd; |
fbf65064 | 15452 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
aaa75496 | 15453 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 15454 | struct subfile *last_subfile = NULL; |
c91513d8 PP |
15455 | void (*p_record_line) (struct subfile *subfile, int line, CORE_ADDR pc) |
15456 | = record_line; | |
e142c38c DJ |
15457 | |
15458 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15459 | |
debd256d JB |
15460 | line_ptr = lh->statement_program_start; |
15461 | line_end = lh->statement_program_end; | |
c906108c SS |
15462 | |
15463 | /* Read the statement sequences until there's nothing left. */ | |
15464 | while (line_ptr < line_end) | |
15465 | { | |
15466 | /* state machine registers */ | |
15467 | CORE_ADDR address = 0; | |
15468 | unsigned int file = 1; | |
15469 | unsigned int line = 1; | |
15470 | unsigned int column = 0; | |
debd256d | 15471 | int is_stmt = lh->default_is_stmt; |
c906108c SS |
15472 | int basic_block = 0; |
15473 | int end_sequence = 0; | |
fbf65064 | 15474 | CORE_ADDR addr; |
2dc7f7b3 | 15475 | unsigned char op_index = 0; |
c906108c | 15476 | |
aaa75496 | 15477 | if (!decode_for_pst_p && lh->num_file_names >= file) |
c906108c | 15478 | { |
aaa75496 | 15479 | /* Start a subfile for the current file of the state machine. */ |
debd256d JB |
15480 | /* lh->include_dirs and lh->file_names are 0-based, but the |
15481 | directory and file name numbers in the statement program | |
15482 | are 1-based. */ | |
15483 | struct file_entry *fe = &lh->file_names[file - 1]; | |
d521ce57 | 15484 | const char *dir = NULL; |
a738430d | 15485 | |
debd256d JB |
15486 | if (fe->dir_index) |
15487 | dir = lh->include_dirs[fe->dir_index - 1]; | |
4f1520fb FR |
15488 | |
15489 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
c906108c SS |
15490 | } |
15491 | ||
a738430d | 15492 | /* Decode the table. */ |
c5aa993b | 15493 | while (!end_sequence) |
c906108c SS |
15494 | { |
15495 | op_code = read_1_byte (abfd, line_ptr); | |
15496 | line_ptr += 1; | |
59205f5a JB |
15497 | if (line_ptr > line_end) |
15498 | { | |
15499 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
15500 | break; | |
15501 | } | |
9aa1fe7e | 15502 | |
debd256d | 15503 | if (op_code >= lh->opcode_base) |
6e70227d | 15504 | { |
a738430d | 15505 | /* Special operand. */ |
debd256d | 15506 | adj_opcode = op_code - lh->opcode_base; |
2dc7f7b3 TT |
15507 | address += (((op_index + (adj_opcode / lh->line_range)) |
15508 | / lh->maximum_ops_per_instruction) | |
15509 | * lh->minimum_instruction_length); | |
15510 | op_index = ((op_index + (adj_opcode / lh->line_range)) | |
15511 | % lh->maximum_ops_per_instruction); | |
debd256d | 15512 | line += lh->line_base + (adj_opcode % lh->line_range); |
59205f5a | 15513 | if (lh->num_file_names < file || file == 0) |
25e43795 | 15514 | dwarf2_debug_line_missing_file_complaint (); |
2dc7f7b3 TT |
15515 | /* For now we ignore lines not starting on an |
15516 | instruction boundary. */ | |
15517 | else if (op_index == 0) | |
25e43795 DJ |
15518 | { |
15519 | lh->file_names[file - 1].included_p = 1; | |
ca5f395d | 15520 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15521 | { |
15522 | if (last_subfile != current_subfile) | |
15523 | { | |
15524 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15525 | if (last_subfile) | |
c91513d8 | 15526 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15527 | last_subfile = current_subfile; |
15528 | } | |
25e43795 | 15529 | /* Append row to matrix using current values. */ |
7019d805 | 15530 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15531 | (*p_record_line) (current_subfile, line, addr); |
366da635 | 15532 | } |
25e43795 | 15533 | } |
ca5f395d | 15534 | basic_block = 0; |
9aa1fe7e GK |
15535 | } |
15536 | else switch (op_code) | |
c906108c SS |
15537 | { |
15538 | case DW_LNS_extended_op: | |
3e43a32a MS |
15539 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
15540 | &bytes_read); | |
473b7be6 | 15541 | line_ptr += bytes_read; |
a8c50c1f | 15542 | extended_end = line_ptr + extended_len; |
c906108c SS |
15543 | extended_op = read_1_byte (abfd, line_ptr); |
15544 | line_ptr += 1; | |
15545 | switch (extended_op) | |
15546 | { | |
15547 | case DW_LNE_end_sequence: | |
c91513d8 | 15548 | p_record_line = record_line; |
c906108c | 15549 | end_sequence = 1; |
c906108c SS |
15550 | break; |
15551 | case DW_LNE_set_address: | |
e7c27a73 | 15552 | address = read_address (abfd, line_ptr, cu, &bytes_read); |
c91513d8 PP |
15553 | |
15554 | if (address == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
15555 | { | |
15556 | /* This line table is for a function which has been | |
15557 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
15558 | ||
15559 | long line_offset | |
36586728 | 15560 | = line_ptr - get_debug_line_section (cu)->buffer; |
c91513d8 PP |
15561 | |
15562 | complaint (&symfile_complaints, | |
15563 | _(".debug_line address at offset 0x%lx is 0 " | |
15564 | "[in module %s]"), | |
bb5ed363 | 15565 | line_offset, objfile->name); |
c91513d8 PP |
15566 | p_record_line = noop_record_line; |
15567 | } | |
15568 | ||
2dc7f7b3 | 15569 | op_index = 0; |
107d2387 AC |
15570 | line_ptr += bytes_read; |
15571 | address += baseaddr; | |
c906108c SS |
15572 | break; |
15573 | case DW_LNE_define_file: | |
debd256d | 15574 | { |
d521ce57 | 15575 | const char *cur_file; |
debd256d | 15576 | unsigned int dir_index, mod_time, length; |
6e70227d | 15577 | |
3e43a32a MS |
15578 | cur_file = read_direct_string (abfd, line_ptr, |
15579 | &bytes_read); | |
debd256d JB |
15580 | line_ptr += bytes_read; |
15581 | dir_index = | |
15582 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15583 | line_ptr += bytes_read; | |
15584 | mod_time = | |
15585 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15586 | line_ptr += bytes_read; | |
15587 | length = | |
15588 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15589 | line_ptr += bytes_read; | |
15590 | add_file_name (lh, cur_file, dir_index, mod_time, length); | |
15591 | } | |
c906108c | 15592 | break; |
d0c6ba3d CC |
15593 | case DW_LNE_set_discriminator: |
15594 | /* The discriminator is not interesting to the debugger; | |
15595 | just ignore it. */ | |
15596 | line_ptr = extended_end; | |
15597 | break; | |
c906108c | 15598 | default: |
4d3c2250 | 15599 | complaint (&symfile_complaints, |
e2e0b3e5 | 15600 | _("mangled .debug_line section")); |
debd256d | 15601 | return; |
c906108c | 15602 | } |
a8c50c1f DJ |
15603 | /* Make sure that we parsed the extended op correctly. If e.g. |
15604 | we expected a different address size than the producer used, | |
15605 | we may have read the wrong number of bytes. */ | |
15606 | if (line_ptr != extended_end) | |
15607 | { | |
15608 | complaint (&symfile_complaints, | |
15609 | _("mangled .debug_line section")); | |
15610 | return; | |
15611 | } | |
c906108c SS |
15612 | break; |
15613 | case DW_LNS_copy: | |
59205f5a | 15614 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15615 | dwarf2_debug_line_missing_file_complaint (); |
15616 | else | |
366da635 | 15617 | { |
25e43795 | 15618 | lh->file_names[file - 1].included_p = 1; |
ca5f395d | 15619 | if (!decode_for_pst_p && is_stmt) |
fbf65064 UW |
15620 | { |
15621 | if (last_subfile != current_subfile) | |
15622 | { | |
15623 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
15624 | if (last_subfile) | |
c91513d8 | 15625 | (*p_record_line) (last_subfile, 0, addr); |
fbf65064 UW |
15626 | last_subfile = current_subfile; |
15627 | } | |
7019d805 | 15628 | addr = gdbarch_addr_bits_remove (gdbarch, address); |
c91513d8 | 15629 | (*p_record_line) (current_subfile, line, addr); |
fbf65064 | 15630 | } |
366da635 | 15631 | } |
c906108c SS |
15632 | basic_block = 0; |
15633 | break; | |
15634 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
15635 | { |
15636 | CORE_ADDR adjust | |
15637 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15638 | ||
15639 | address += (((op_index + adjust) | |
15640 | / lh->maximum_ops_per_instruction) | |
15641 | * lh->minimum_instruction_length); | |
15642 | op_index = ((op_index + adjust) | |
15643 | % lh->maximum_ops_per_instruction); | |
15644 | line_ptr += bytes_read; | |
15645 | } | |
c906108c SS |
15646 | break; |
15647 | case DW_LNS_advance_line: | |
15648 | line += read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
15649 | line_ptr += bytes_read; | |
15650 | break; | |
15651 | case DW_LNS_set_file: | |
debd256d | 15652 | { |
a738430d MK |
15653 | /* The arrays lh->include_dirs and lh->file_names are |
15654 | 0-based, but the directory and file name numbers in | |
15655 | the statement program are 1-based. */ | |
debd256d | 15656 | struct file_entry *fe; |
d521ce57 | 15657 | const char *dir = NULL; |
a738430d | 15658 | |
debd256d JB |
15659 | file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
15660 | line_ptr += bytes_read; | |
59205f5a | 15661 | if (lh->num_file_names < file || file == 0) |
25e43795 DJ |
15662 | dwarf2_debug_line_missing_file_complaint (); |
15663 | else | |
15664 | { | |
15665 | fe = &lh->file_names[file - 1]; | |
15666 | if (fe->dir_index) | |
15667 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15668 | if (!decode_for_pst_p) | |
15669 | { | |
15670 | last_subfile = current_subfile; | |
15671 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15672 | } | |
15673 | } | |
debd256d | 15674 | } |
c906108c SS |
15675 | break; |
15676 | case DW_LNS_set_column: | |
15677 | column = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15678 | line_ptr += bytes_read; | |
15679 | break; | |
15680 | case DW_LNS_negate_stmt: | |
15681 | is_stmt = (!is_stmt); | |
15682 | break; | |
15683 | case DW_LNS_set_basic_block: | |
15684 | basic_block = 1; | |
15685 | break; | |
c2c6d25f JM |
15686 | /* Add to the address register of the state machine the |
15687 | address increment value corresponding to special opcode | |
a738430d MK |
15688 | 255. I.e., this value is scaled by the minimum |
15689 | instruction length since special opcode 255 would have | |
b021a221 | 15690 | scaled the increment. */ |
c906108c | 15691 | case DW_LNS_const_add_pc: |
2dc7f7b3 TT |
15692 | { |
15693 | CORE_ADDR adjust = (255 - lh->opcode_base) / lh->line_range; | |
15694 | ||
15695 | address += (((op_index + adjust) | |
15696 | / lh->maximum_ops_per_instruction) | |
15697 | * lh->minimum_instruction_length); | |
15698 | op_index = ((op_index + adjust) | |
15699 | % lh->maximum_ops_per_instruction); | |
15700 | } | |
c906108c SS |
15701 | break; |
15702 | case DW_LNS_fixed_advance_pc: | |
15703 | address += read_2_bytes (abfd, line_ptr); | |
2dc7f7b3 | 15704 | op_index = 0; |
c906108c SS |
15705 | line_ptr += 2; |
15706 | break; | |
9aa1fe7e | 15707 | default: |
a738430d MK |
15708 | { |
15709 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 15710 | int i; |
a738430d | 15711 | |
debd256d | 15712 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
15713 | { |
15714 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
15715 | line_ptr += bytes_read; | |
15716 | } | |
15717 | } | |
c906108c SS |
15718 | } |
15719 | } | |
59205f5a JB |
15720 | if (lh->num_file_names < file || file == 0) |
15721 | dwarf2_debug_line_missing_file_complaint (); | |
15722 | else | |
15723 | { | |
15724 | lh->file_names[file - 1].included_p = 1; | |
15725 | if (!decode_for_pst_p) | |
fbf65064 UW |
15726 | { |
15727 | addr = gdbarch_addr_bits_remove (gdbarch, address); | |
c91513d8 | 15728 | (*p_record_line) (current_subfile, 0, addr); |
fbf65064 | 15729 | } |
59205f5a | 15730 | } |
c906108c | 15731 | } |
f3f5162e DE |
15732 | } |
15733 | ||
15734 | /* Decode the Line Number Program (LNP) for the given line_header | |
15735 | structure and CU. The actual information extracted and the type | |
15736 | of structures created from the LNP depends on the value of PST. | |
15737 | ||
15738 | 1. If PST is NULL, then this procedure uses the data from the program | |
15739 | to create all necessary symbol tables, and their linetables. | |
15740 | ||
15741 | 2. If PST is not NULL, this procedure reads the program to determine | |
15742 | the list of files included by the unit represented by PST, and | |
15743 | builds all the associated partial symbol tables. | |
15744 | ||
15745 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
15746 | It is used for relative paths in the line table. | |
15747 | NOTE: When processing partial symtabs (pst != NULL), | |
15748 | comp_dir == pst->dirname. | |
15749 | ||
15750 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
15751 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
15752 | symtab we don't use it in the name of the psymtabs we create. | |
15753 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
15754 | A good testcase for this is mb-inline.exp. */ | |
15755 | ||
15756 | static void | |
15757 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
15758 | struct dwarf2_cu *cu, struct partial_symtab *pst, | |
15759 | int want_line_info) | |
15760 | { | |
15761 | struct objfile *objfile = cu->objfile; | |
15762 | const int decode_for_pst_p = (pst != NULL); | |
15763 | struct subfile *first_subfile = current_subfile; | |
15764 | ||
15765 | if (want_line_info) | |
15766 | dwarf_decode_lines_1 (lh, comp_dir, cu, pst); | |
aaa75496 JB |
15767 | |
15768 | if (decode_for_pst_p) | |
15769 | { | |
15770 | int file_index; | |
15771 | ||
15772 | /* Now that we're done scanning the Line Header Program, we can | |
15773 | create the psymtab of each included file. */ | |
15774 | for (file_index = 0; file_index < lh->num_file_names; file_index++) | |
15775 | if (lh->file_names[file_index].included_p == 1) | |
15776 | { | |
d521ce57 | 15777 | const char *include_name = |
c6da4cef DE |
15778 | psymtab_include_file_name (lh, file_index, pst, comp_dir); |
15779 | if (include_name != NULL) | |
aaa75496 JB |
15780 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
15781 | } | |
15782 | } | |
cb1df416 DJ |
15783 | else |
15784 | { | |
15785 | /* Make sure a symtab is created for every file, even files | |
15786 | which contain only variables (i.e. no code with associated | |
15787 | line numbers). */ | |
cb1df416 | 15788 | int i; |
cb1df416 DJ |
15789 | |
15790 | for (i = 0; i < lh->num_file_names; i++) | |
15791 | { | |
d521ce57 | 15792 | const char *dir = NULL; |
f3f5162e | 15793 | struct file_entry *fe; |
9a619af0 | 15794 | |
cb1df416 DJ |
15795 | fe = &lh->file_names[i]; |
15796 | if (fe->dir_index) | |
15797 | dir = lh->include_dirs[fe->dir_index - 1]; | |
15798 | dwarf2_start_subfile (fe->name, dir, comp_dir); | |
15799 | ||
15800 | /* Skip the main file; we don't need it, and it must be | |
15801 | allocated last, so that it will show up before the | |
15802 | non-primary symtabs in the objfile's symtab list. */ | |
15803 | if (current_subfile == first_subfile) | |
15804 | continue; | |
15805 | ||
15806 | if (current_subfile->symtab == NULL) | |
15807 | current_subfile->symtab = allocate_symtab (current_subfile->name, | |
bb5ed363 | 15808 | objfile); |
cb1df416 DJ |
15809 | fe->symtab = current_subfile->symtab; |
15810 | } | |
15811 | } | |
c906108c SS |
15812 | } |
15813 | ||
15814 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
15815 | DIRNAME the name of the source directory which contains FILENAME | |
4f1520fb FR |
15816 | or NULL if not known. COMP_DIR is the compilation directory for the |
15817 | linetable's compilation unit or NULL if not known. | |
c906108c SS |
15818 | This routine tries to keep line numbers from identical absolute and |
15819 | relative file names in a common subfile. | |
15820 | ||
15821 | Using the `list' example from the GDB testsuite, which resides in | |
15822 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
15823 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
15824 | ||
c5aa993b JM |
15825 | DW_AT_name: /srcdir/list0.c |
15826 | DW_AT_comp_dir: /compdir | |
357e46e7 | 15827 | files.files[0].name: list0.h |
c5aa993b | 15828 | files.files[0].dir: /srcdir |
357e46e7 | 15829 | files.files[1].name: list0.c |
c5aa993b | 15830 | files.files[1].dir: /srcdir |
c906108c SS |
15831 | |
15832 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
15833 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
15834 | start_subfile will ensure that this happens provided that we pass the | |
15835 | concatenation of files.files[1].dir and files.files[1].name as the | |
15836 | subfile's name. */ | |
c906108c SS |
15837 | |
15838 | static void | |
d521ce57 | 15839 | dwarf2_start_subfile (const char *filename, const char *dirname, |
3e43a32a | 15840 | const char *comp_dir) |
c906108c | 15841 | { |
d521ce57 | 15842 | char *copy = NULL; |
4f1520fb FR |
15843 | |
15844 | /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir). | |
15845 | `start_symtab' will always pass the contents of DW_AT_comp_dir as | |
15846 | second argument to start_subfile. To be consistent, we do the | |
15847 | same here. In order not to lose the line information directory, | |
15848 | we concatenate it to the filename when it makes sense. | |
15849 | Note that the Dwarf3 standard says (speaking of filenames in line | |
15850 | information): ``The directory index is ignored for file names | |
15851 | that represent full path names''. Thus ignoring dirname in the | |
15852 | `else' branch below isn't an issue. */ | |
c906108c | 15853 | |
d5166ae1 | 15854 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 TT |
15855 | { |
15856 | copy = concat (dirname, SLASH_STRING, filename, (char *)NULL); | |
15857 | filename = copy; | |
15858 | } | |
c906108c | 15859 | |
d521ce57 | 15860 | start_subfile (filename, comp_dir); |
4f1520fb | 15861 | |
d521ce57 TT |
15862 | if (copy != NULL) |
15863 | xfree (copy); | |
c906108c SS |
15864 | } |
15865 | ||
f4dc4d17 DE |
15866 | /* Start a symtab for DWARF. |
15867 | NAME, COMP_DIR, LOW_PC are passed to start_symtab. */ | |
15868 | ||
15869 | static void | |
15870 | dwarf2_start_symtab (struct dwarf2_cu *cu, | |
15d034d0 | 15871 | const char *name, const char *comp_dir, CORE_ADDR low_pc) |
f4dc4d17 DE |
15872 | { |
15873 | start_symtab (name, comp_dir, low_pc); | |
15874 | record_debugformat ("DWARF 2"); | |
15875 | record_producer (cu->producer); | |
15876 | ||
15877 | /* We assume that we're processing GCC output. */ | |
15878 | processing_gcc_compilation = 2; | |
15879 | ||
4d4ec4e5 | 15880 | cu->processing_has_namespace_info = 0; |
f4dc4d17 DE |
15881 | } |
15882 | ||
4c2df51b DJ |
15883 | static void |
15884 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 15885 | struct dwarf2_cu *cu) |
4c2df51b | 15886 | { |
e7c27a73 DJ |
15887 | struct objfile *objfile = cu->objfile; |
15888 | struct comp_unit_head *cu_header = &cu->header; | |
15889 | ||
4c2df51b DJ |
15890 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
15891 | code here to turn a symbol with DW_AT_external and a | |
15892 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
15893 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
15894 | with some versions of binutils) where shared libraries could have | |
15895 | relocations against symbols in their debug information - the | |
15896 | minimal symbol would have the right address, but the debug info | |
15897 | would not. It's no longer necessary, because we will explicitly | |
15898 | apply relocations when we read in the debug information now. */ | |
15899 | ||
15900 | /* A DW_AT_location attribute with no contents indicates that a | |
15901 | variable has been optimized away. */ | |
15902 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
15903 | { | |
f1e6e072 | 15904 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
15905 | return; |
15906 | } | |
15907 | ||
15908 | /* Handle one degenerate form of location expression specially, to | |
15909 | preserve GDB's previous behavior when section offsets are | |
3019eac3 DE |
15910 | specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index |
15911 | then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
15912 | |
15913 | if (attr_form_is_block (attr) | |
3019eac3 DE |
15914 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
15915 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
15916 | || (DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index | |
15917 | && (DW_BLOCK (attr)->size | |
15918 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 15919 | { |
891d2f0b | 15920 | unsigned int dummy; |
4c2df51b | 15921 | |
3019eac3 DE |
15922 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
15923 | SYMBOL_VALUE_ADDRESS (sym) = | |
15924 | read_address (objfile->obfd, DW_BLOCK (attr)->data + 1, cu, &dummy); | |
15925 | else | |
15926 | SYMBOL_VALUE_ADDRESS (sym) = | |
15927 | read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, &dummy); | |
f1e6e072 | 15928 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b DJ |
15929 | fixup_symbol_section (sym, objfile); |
15930 | SYMBOL_VALUE_ADDRESS (sym) += ANOFFSET (objfile->section_offsets, | |
15931 | SYMBOL_SECTION (sym)); | |
4c2df51b DJ |
15932 | return; |
15933 | } | |
15934 | ||
15935 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
15936 | expression evaluator, and use LOC_COMPUTED only when necessary | |
15937 | (i.e. when the value of a register or memory location is | |
15938 | referenced, or a thread-local block, etc.). Then again, it might | |
15939 | not be worthwhile. I'm assuming that it isn't unless performance | |
15940 | or memory numbers show me otherwise. */ | |
15941 | ||
f1e6e072 | 15942 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 15943 | |
f1e6e072 | 15944 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
8be455d7 | 15945 | cu->has_loclist = 1; |
4c2df51b DJ |
15946 | } |
15947 | ||
c906108c SS |
15948 | /* Given a pointer to a DWARF information entry, figure out if we need |
15949 | to make a symbol table entry for it, and if so, create a new entry | |
15950 | and return a pointer to it. | |
15951 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
15952 | used the passed type. |
15953 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
15954 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
15955 | |
15956 | static struct symbol * | |
34eaf542 TT |
15957 | new_symbol_full (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
15958 | struct symbol *space) | |
c906108c | 15959 | { |
e7c27a73 | 15960 | struct objfile *objfile = cu->objfile; |
c906108c | 15961 | struct symbol *sym = NULL; |
15d034d0 | 15962 | const char *name; |
c906108c SS |
15963 | struct attribute *attr = NULL; |
15964 | struct attribute *attr2 = NULL; | |
e142c38c | 15965 | CORE_ADDR baseaddr; |
e37fd15a SW |
15966 | struct pending **list_to_add = NULL; |
15967 | ||
edb3359d | 15968 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c DJ |
15969 | |
15970 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
c906108c | 15971 | |
94af9270 | 15972 | name = dwarf2_name (die, cu); |
c906108c SS |
15973 | if (name) |
15974 | { | |
94af9270 | 15975 | const char *linkagename; |
34eaf542 | 15976 | int suppress_add = 0; |
94af9270 | 15977 | |
34eaf542 TT |
15978 | if (space) |
15979 | sym = space; | |
15980 | else | |
e623cf5d | 15981 | sym = allocate_symbol (objfile); |
c906108c | 15982 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
15983 | |
15984 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
f85f34ed | 15985 | SYMBOL_SET_LANGUAGE (sym, cu->language, &objfile->objfile_obstack); |
94af9270 KS |
15986 | linkagename = dwarf2_physname (name, die, cu); |
15987 | SYMBOL_SET_NAMES (sym, linkagename, strlen (linkagename), 0, objfile); | |
c906108c | 15988 | |
f55ee35c JK |
15989 | /* Fortran does not have mangling standard and the mangling does differ |
15990 | between gfortran, iFort etc. */ | |
15991 | if (cu->language == language_fortran | |
b250c185 | 15992 | && symbol_get_demangled_name (&(sym->ginfo)) == NULL) |
29df156d | 15993 | symbol_set_demangled_name (&(sym->ginfo), |
cfc594ee | 15994 | dwarf2_full_name (name, die, cu), |
29df156d | 15995 | NULL); |
f55ee35c | 15996 | |
c906108c | 15997 | /* Default assumptions. |
c5aa993b | 15998 | Use the passed type or decode it from the die. */ |
176620f1 | 15999 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 16000 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
16001 | if (type != NULL) |
16002 | SYMBOL_TYPE (sym) = type; | |
16003 | else | |
e7c27a73 | 16004 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
16005 | attr = dwarf2_attr (die, |
16006 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
16007 | cu); | |
c906108c SS |
16008 | if (attr) |
16009 | { | |
16010 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
16011 | } | |
cb1df416 | 16012 | |
edb3359d DJ |
16013 | attr = dwarf2_attr (die, |
16014 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
16015 | cu); | |
cb1df416 DJ |
16016 | if (attr) |
16017 | { | |
16018 | int file_index = DW_UNSND (attr); | |
9a619af0 | 16019 | |
cb1df416 DJ |
16020 | if (cu->line_header == NULL |
16021 | || file_index > cu->line_header->num_file_names) | |
16022 | complaint (&symfile_complaints, | |
16023 | _("file index out of range")); | |
1c3d648d | 16024 | else if (file_index > 0) |
cb1df416 DJ |
16025 | { |
16026 | struct file_entry *fe; | |
9a619af0 | 16027 | |
cb1df416 DJ |
16028 | fe = &cu->line_header->file_names[file_index - 1]; |
16029 | SYMBOL_SYMTAB (sym) = fe->symtab; | |
16030 | } | |
16031 | } | |
16032 | ||
c906108c SS |
16033 | switch (die->tag) |
16034 | { | |
16035 | case DW_TAG_label: | |
e142c38c | 16036 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
c906108c SS |
16037 | if (attr) |
16038 | { | |
16039 | SYMBOL_VALUE_ADDRESS (sym) = DW_ADDR (attr) + baseaddr; | |
16040 | } | |
0f5238ed TT |
16041 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
16042 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 16043 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
0f5238ed | 16044 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
16045 | break; |
16046 | case DW_TAG_subprogram: | |
16047 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
16048 | finish_block. */ | |
f1e6e072 | 16049 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 16050 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d JB |
16051 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
16052 | || cu->language == language_ada) | |
c906108c | 16053 | { |
2cfa0c8d JB |
16054 | /* Subprograms marked external are stored as a global symbol. |
16055 | Ada subprograms, whether marked external or not, are always | |
16056 | stored as a global symbol, because we want to be able to | |
16057 | access them globally. For instance, we want to be able | |
16058 | to break on a nested subprogram without having to | |
16059 | specify the context. */ | |
e37fd15a | 16060 | list_to_add = &global_symbols; |
c906108c SS |
16061 | } |
16062 | else | |
16063 | { | |
e37fd15a | 16064 | list_to_add = cu->list_in_scope; |
c906108c SS |
16065 | } |
16066 | break; | |
edb3359d DJ |
16067 | case DW_TAG_inlined_subroutine: |
16068 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
16069 | finish_block. */ | |
f1e6e072 | 16070 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 16071 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 16072 | list_to_add = cu->list_in_scope; |
edb3359d | 16073 | break; |
34eaf542 TT |
16074 | case DW_TAG_template_value_param: |
16075 | suppress_add = 1; | |
16076 | /* Fall through. */ | |
72929c62 | 16077 | case DW_TAG_constant: |
c906108c | 16078 | case DW_TAG_variable: |
254e6b9e | 16079 | case DW_TAG_member: |
0963b4bd MS |
16080 | /* Compilation with minimal debug info may result in |
16081 | variables with missing type entries. Change the | |
16082 | misleading `void' type to something sensible. */ | |
c906108c | 16083 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
64c50499 | 16084 | SYMBOL_TYPE (sym) |
46bf5051 | 16085 | = objfile_type (objfile)->nodebug_data_symbol; |
64c50499 | 16086 | |
e142c38c | 16087 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
16088 | /* In the case of DW_TAG_member, we should only be called for |
16089 | static const members. */ | |
16090 | if (die->tag == DW_TAG_member) | |
16091 | { | |
3863f96c DE |
16092 | /* dwarf2_add_field uses die_is_declaration, |
16093 | so we do the same. */ | |
254e6b9e DE |
16094 | gdb_assert (die_is_declaration (die, cu)); |
16095 | gdb_assert (attr); | |
16096 | } | |
c906108c SS |
16097 | if (attr) |
16098 | { | |
e7c27a73 | 16099 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 16100 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 16101 | if (!suppress_add) |
34eaf542 TT |
16102 | { |
16103 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
e37fd15a | 16104 | list_to_add = &global_symbols; |
34eaf542 | 16105 | else |
e37fd15a | 16106 | list_to_add = cu->list_in_scope; |
34eaf542 | 16107 | } |
c906108c SS |
16108 | break; |
16109 | } | |
e142c38c | 16110 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
16111 | if (attr) |
16112 | { | |
e7c27a73 | 16113 | var_decode_location (attr, sym, cu); |
e142c38c | 16114 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
16115 | |
16116 | /* Fortran explicitly imports any global symbols to the local | |
16117 | scope by DW_TAG_common_block. */ | |
16118 | if (cu->language == language_fortran && die->parent | |
16119 | && die->parent->tag == DW_TAG_common_block) | |
16120 | attr2 = NULL; | |
16121 | ||
caac4577 JG |
16122 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
16123 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
16124 | && !dwarf2_per_objfile->has_section_at_zero) | |
16125 | { | |
16126 | /* When a static variable is eliminated by the linker, | |
16127 | the corresponding debug information is not stripped | |
16128 | out, but the variable address is set to null; | |
16129 | do not add such variables into symbol table. */ | |
16130 | } | |
16131 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 16132 | { |
f55ee35c JK |
16133 | /* Workaround gfortran PR debug/40040 - it uses |
16134 | DW_AT_location for variables in -fPIC libraries which may | |
16135 | get overriden by other libraries/executable and get | |
16136 | a different address. Resolve it by the minimal symbol | |
16137 | which may come from inferior's executable using copy | |
16138 | relocation. Make this workaround only for gfortran as for | |
16139 | other compilers GDB cannot guess the minimal symbol | |
16140 | Fortran mangling kind. */ | |
16141 | if (cu->language == language_fortran && die->parent | |
16142 | && die->parent->tag == DW_TAG_module | |
16143 | && cu->producer | |
16144 | && strncmp (cu->producer, "GNU Fortran ", 12) == 0) | |
f1e6e072 | 16145 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
f55ee35c | 16146 | |
1c809c68 TT |
16147 | /* A variable with DW_AT_external is never static, |
16148 | but it may be block-scoped. */ | |
16149 | list_to_add = (cu->list_in_scope == &file_symbols | |
16150 | ? &global_symbols : cu->list_in_scope); | |
1c809c68 | 16151 | } |
c906108c | 16152 | else |
e37fd15a | 16153 | list_to_add = cu->list_in_scope; |
c906108c SS |
16154 | } |
16155 | else | |
16156 | { | |
16157 | /* We do not know the address of this symbol. | |
c5aa993b JM |
16158 | If it is an external symbol and we have type information |
16159 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
16160 | The address of the variable will then be determined from | |
16161 | the minimal symbol table whenever the variable is | |
16162 | referenced. */ | |
e142c38c | 16163 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
16164 | |
16165 | /* Fortran explicitly imports any global symbols to the local | |
16166 | scope by DW_TAG_common_block. */ | |
16167 | if (cu->language == language_fortran && die->parent | |
16168 | && die->parent->tag == DW_TAG_common_block) | |
16169 | { | |
16170 | /* SYMBOL_CLASS doesn't matter here because | |
16171 | read_common_block is going to reset it. */ | |
16172 | if (!suppress_add) | |
16173 | list_to_add = cu->list_in_scope; | |
16174 | } | |
16175 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
16176 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 16177 | { |
0fe7935b DJ |
16178 | /* A variable with DW_AT_external is never static, but it |
16179 | may be block-scoped. */ | |
16180 | list_to_add = (cu->list_in_scope == &file_symbols | |
16181 | ? &global_symbols : cu->list_in_scope); | |
16182 | ||
f1e6e072 | 16183 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 16184 | } |
442ddf59 JK |
16185 | else if (!die_is_declaration (die, cu)) |
16186 | { | |
16187 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
16188 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
16189 | if (!suppress_add) |
16190 | list_to_add = cu->list_in_scope; | |
442ddf59 | 16191 | } |
c906108c SS |
16192 | } |
16193 | break; | |
16194 | case DW_TAG_formal_parameter: | |
edb3359d DJ |
16195 | /* If we are inside a function, mark this as an argument. If |
16196 | not, we might be looking at an argument to an inlined function | |
16197 | when we do not have enough information to show inlined frames; | |
16198 | pretend it's a local variable in that case so that the user can | |
16199 | still see it. */ | |
16200 | if (context_stack_depth > 0 | |
16201 | && context_stack[context_stack_depth - 1].name != NULL) | |
16202 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
e142c38c | 16203 | attr = dwarf2_attr (die, DW_AT_location, cu); |
c906108c SS |
16204 | if (attr) |
16205 | { | |
e7c27a73 | 16206 | var_decode_location (attr, sym, cu); |
c906108c | 16207 | } |
e142c38c | 16208 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
16209 | if (attr) |
16210 | { | |
e7c27a73 | 16211 | dwarf2_const_value (attr, sym, cu); |
c906108c | 16212 | } |
f346a30d | 16213 | |
e37fd15a | 16214 | list_to_add = cu->list_in_scope; |
c906108c SS |
16215 | break; |
16216 | case DW_TAG_unspecified_parameters: | |
16217 | /* From varargs functions; gdb doesn't seem to have any | |
16218 | interest in this information, so just ignore it for now. | |
16219 | (FIXME?) */ | |
16220 | break; | |
34eaf542 TT |
16221 | case DW_TAG_template_type_param: |
16222 | suppress_add = 1; | |
16223 | /* Fall through. */ | |
c906108c | 16224 | case DW_TAG_class_type: |
680b30c7 | 16225 | case DW_TAG_interface_type: |
c906108c SS |
16226 | case DW_TAG_structure_type: |
16227 | case DW_TAG_union_type: | |
72019c9c | 16228 | case DW_TAG_set_type: |
c906108c | 16229 | case DW_TAG_enumeration_type: |
f1e6e072 | 16230 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 16231 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 16232 | |
63d06c5c | 16233 | { |
987504bb | 16234 | /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't |
63d06c5c DC |
16235 | really ever be static objects: otherwise, if you try |
16236 | to, say, break of a class's method and you're in a file | |
16237 | which doesn't mention that class, it won't work unless | |
16238 | the check for all static symbols in lookup_symbol_aux | |
16239 | saves you. See the OtherFileClass tests in | |
16240 | gdb.c++/namespace.exp. */ | |
16241 | ||
e37fd15a | 16242 | if (!suppress_add) |
34eaf542 | 16243 | { |
34eaf542 TT |
16244 | list_to_add = (cu->list_in_scope == &file_symbols |
16245 | && (cu->language == language_cplus | |
16246 | || cu->language == language_java) | |
16247 | ? &global_symbols : cu->list_in_scope); | |
63d06c5c | 16248 | |
64382290 TT |
16249 | /* The semantics of C++ state that "struct foo { |
16250 | ... }" also defines a typedef for "foo". A Java | |
16251 | class declaration also defines a typedef for the | |
16252 | class. */ | |
16253 | if (cu->language == language_cplus | |
16254 | || cu->language == language_java | |
16255 | || cu->language == language_ada) | |
16256 | { | |
16257 | /* The symbol's name is already allocated along | |
16258 | with this objfile, so we don't need to | |
16259 | duplicate it for the type. */ | |
16260 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
16261 | TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_SEARCH_NAME (sym); | |
16262 | } | |
63d06c5c DC |
16263 | } |
16264 | } | |
c906108c SS |
16265 | break; |
16266 | case DW_TAG_typedef: | |
f1e6e072 | 16267 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 16268 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 16269 | list_to_add = cu->list_in_scope; |
63d06c5c | 16270 | break; |
c906108c | 16271 | case DW_TAG_base_type: |
a02abb62 | 16272 | case DW_TAG_subrange_type: |
f1e6e072 | 16273 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 16274 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 16275 | list_to_add = cu->list_in_scope; |
c906108c SS |
16276 | break; |
16277 | case DW_TAG_enumerator: | |
e142c38c | 16278 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
c906108c SS |
16279 | if (attr) |
16280 | { | |
e7c27a73 | 16281 | dwarf2_const_value (attr, sym, cu); |
c906108c | 16282 | } |
63d06c5c DC |
16283 | { |
16284 | /* NOTE: carlton/2003-11-10: See comment above in the | |
16285 | DW_TAG_class_type, etc. block. */ | |
16286 | ||
e142c38c | 16287 | list_to_add = (cu->list_in_scope == &file_symbols |
987504bb JJ |
16288 | && (cu->language == language_cplus |
16289 | || cu->language == language_java) | |
e142c38c | 16290 | ? &global_symbols : cu->list_in_scope); |
63d06c5c | 16291 | } |
c906108c | 16292 | break; |
5c4e30ca | 16293 | case DW_TAG_namespace: |
f1e6e072 | 16294 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
e37fd15a | 16295 | list_to_add = &global_symbols; |
5c4e30ca | 16296 | break; |
4357ac6c | 16297 | case DW_TAG_common_block: |
f1e6e072 | 16298 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c TT |
16299 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
16300 | add_symbol_to_list (sym, cu->list_in_scope); | |
16301 | break; | |
c906108c SS |
16302 | default: |
16303 | /* Not a tag we recognize. Hopefully we aren't processing | |
16304 | trash data, but since we must specifically ignore things | |
16305 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 16306 | this point. */ |
e2e0b3e5 | 16307 | complaint (&symfile_complaints, _("unsupported tag: '%s'"), |
4d3c2250 | 16308 | dwarf_tag_name (die->tag)); |
c906108c SS |
16309 | break; |
16310 | } | |
df8a16a1 | 16311 | |
e37fd15a SW |
16312 | if (suppress_add) |
16313 | { | |
16314 | sym->hash_next = objfile->template_symbols; | |
16315 | objfile->template_symbols = sym; | |
16316 | list_to_add = NULL; | |
16317 | } | |
16318 | ||
16319 | if (list_to_add != NULL) | |
16320 | add_symbol_to_list (sym, list_to_add); | |
16321 | ||
df8a16a1 DJ |
16322 | /* For the benefit of old versions of GCC, check for anonymous |
16323 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 16324 | if (!cu->processing_has_namespace_info |
94af9270 | 16325 | && cu->language == language_cplus) |
a10964d1 | 16326 | cp_scan_for_anonymous_namespaces (sym, objfile); |
c906108c SS |
16327 | } |
16328 | return (sym); | |
16329 | } | |
16330 | ||
34eaf542 TT |
16331 | /* A wrapper for new_symbol_full that always allocates a new symbol. */ |
16332 | ||
16333 | static struct symbol * | |
16334 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu) | |
16335 | { | |
16336 | return new_symbol_full (die, type, cu, NULL); | |
16337 | } | |
16338 | ||
98bfdba5 PA |
16339 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
16340 | zero-extend it as appropriate for the symbol's type. The DWARF | |
16341 | standard (v4) is not entirely clear about the meaning of using | |
16342 | DW_FORM_dataN for a constant with a signed type, where the type is | |
16343 | wider than the data. The conclusion of a discussion on the DWARF | |
16344 | list was that this is unspecified. We choose to always zero-extend | |
16345 | because that is the interpretation long in use by GCC. */ | |
c906108c | 16346 | |
98bfdba5 PA |
16347 | static gdb_byte * |
16348 | dwarf2_const_value_data (struct attribute *attr, struct type *type, | |
16349 | const char *name, struct obstack *obstack, | |
12df843f | 16350 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 16351 | { |
e7c27a73 | 16352 | struct objfile *objfile = cu->objfile; |
e17a4113 UW |
16353 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
16354 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
16355 | LONGEST l = DW_UNSND (attr); |
16356 | ||
16357 | if (bits < sizeof (*value) * 8) | |
16358 | { | |
16359 | l &= ((LONGEST) 1 << bits) - 1; | |
16360 | *value = l; | |
16361 | } | |
16362 | else if (bits == sizeof (*value) * 8) | |
16363 | *value = l; | |
16364 | else | |
16365 | { | |
16366 | gdb_byte *bytes = obstack_alloc (obstack, bits / 8); | |
16367 | store_unsigned_integer (bytes, bits / 8, byte_order, l); | |
16368 | return bytes; | |
16369 | } | |
16370 | ||
16371 | return NULL; | |
16372 | } | |
16373 | ||
16374 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
16375 | the value does not fit in *VALUE, set *BYTES - either already | |
16376 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
16377 | or, set *BATON, if we translated the constant to a location | |
16378 | expression. */ | |
16379 | ||
16380 | static void | |
16381 | dwarf2_const_value_attr (struct attribute *attr, struct type *type, | |
16382 | const char *name, struct obstack *obstack, | |
16383 | struct dwarf2_cu *cu, | |
d521ce57 | 16384 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
16385 | struct dwarf2_locexpr_baton **baton) |
16386 | { | |
16387 | struct objfile *objfile = cu->objfile; | |
16388 | struct comp_unit_head *cu_header = &cu->header; | |
c906108c | 16389 | struct dwarf_block *blk; |
98bfdba5 PA |
16390 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
16391 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
16392 | ||
16393 | *value = 0; | |
16394 | *bytes = NULL; | |
16395 | *baton = NULL; | |
c906108c SS |
16396 | |
16397 | switch (attr->form) | |
16398 | { | |
16399 | case DW_FORM_addr: | |
3019eac3 | 16400 | case DW_FORM_GNU_addr_index: |
ac56253d | 16401 | { |
ac56253d TT |
16402 | gdb_byte *data; |
16403 | ||
98bfdba5 PA |
16404 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
16405 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 16406 | cu_header->addr_size, |
98bfdba5 | 16407 | TYPE_LENGTH (type)); |
ac56253d TT |
16408 | /* Symbols of this form are reasonably rare, so we just |
16409 | piggyback on the existing location code rather than writing | |
16410 | a new implementation of symbol_computed_ops. */ | |
98bfdba5 PA |
16411 | *baton = obstack_alloc (&objfile->objfile_obstack, |
16412 | sizeof (struct dwarf2_locexpr_baton)); | |
16413 | (*baton)->per_cu = cu->per_cu; | |
16414 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 16415 | |
98bfdba5 PA |
16416 | (*baton)->size = 2 + cu_header->addr_size; |
16417 | data = obstack_alloc (&objfile->objfile_obstack, (*baton)->size); | |
16418 | (*baton)->data = data; | |
ac56253d TT |
16419 | |
16420 | data[0] = DW_OP_addr; | |
16421 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
16422 | byte_order, DW_ADDR (attr)); | |
16423 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 16424 | } |
c906108c | 16425 | break; |
4ac36638 | 16426 | case DW_FORM_string: |
93b5768b | 16427 | case DW_FORM_strp: |
3019eac3 | 16428 | case DW_FORM_GNU_str_index: |
36586728 | 16429 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
16430 | /* DW_STRING is already allocated on the objfile obstack, point |
16431 | directly to it. */ | |
d521ce57 | 16432 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 16433 | break; |
c906108c SS |
16434 | case DW_FORM_block1: |
16435 | case DW_FORM_block2: | |
16436 | case DW_FORM_block4: | |
16437 | case DW_FORM_block: | |
2dc7f7b3 | 16438 | case DW_FORM_exprloc: |
c906108c | 16439 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
16440 | if (TYPE_LENGTH (type) != blk->size) |
16441 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
16442 | TYPE_LENGTH (type)); | |
16443 | *bytes = blk->data; | |
c906108c | 16444 | break; |
2df3850c JM |
16445 | |
16446 | /* The DW_AT_const_value attributes are supposed to carry the | |
16447 | symbol's value "represented as it would be on the target | |
16448 | architecture." By the time we get here, it's already been | |
16449 | converted to host endianness, so we just need to sign- or | |
16450 | zero-extend it as appropriate. */ | |
16451 | case DW_FORM_data1: | |
3e43a32a MS |
16452 | *bytes = dwarf2_const_value_data (attr, type, name, |
16453 | obstack, cu, value, 8); | |
2df3850c | 16454 | break; |
c906108c | 16455 | case DW_FORM_data2: |
3e43a32a MS |
16456 | *bytes = dwarf2_const_value_data (attr, type, name, |
16457 | obstack, cu, value, 16); | |
2df3850c | 16458 | break; |
c906108c | 16459 | case DW_FORM_data4: |
3e43a32a MS |
16460 | *bytes = dwarf2_const_value_data (attr, type, name, |
16461 | obstack, cu, value, 32); | |
2df3850c | 16462 | break; |
c906108c | 16463 | case DW_FORM_data8: |
3e43a32a MS |
16464 | *bytes = dwarf2_const_value_data (attr, type, name, |
16465 | obstack, cu, value, 64); | |
2df3850c JM |
16466 | break; |
16467 | ||
c906108c | 16468 | case DW_FORM_sdata: |
98bfdba5 | 16469 | *value = DW_SND (attr); |
2df3850c JM |
16470 | break; |
16471 | ||
c906108c | 16472 | case DW_FORM_udata: |
98bfdba5 | 16473 | *value = DW_UNSND (attr); |
c906108c | 16474 | break; |
2df3850c | 16475 | |
c906108c | 16476 | default: |
4d3c2250 | 16477 | complaint (&symfile_complaints, |
e2e0b3e5 | 16478 | _("unsupported const value attribute form: '%s'"), |
4d3c2250 | 16479 | dwarf_form_name (attr->form)); |
98bfdba5 | 16480 | *value = 0; |
c906108c SS |
16481 | break; |
16482 | } | |
16483 | } | |
16484 | ||
2df3850c | 16485 | |
98bfdba5 PA |
16486 | /* Copy constant value from an attribute to a symbol. */ |
16487 | ||
2df3850c | 16488 | static void |
98bfdba5 PA |
16489 | dwarf2_const_value (struct attribute *attr, struct symbol *sym, |
16490 | struct dwarf2_cu *cu) | |
2df3850c | 16491 | { |
98bfdba5 PA |
16492 | struct objfile *objfile = cu->objfile; |
16493 | struct comp_unit_head *cu_header = &cu->header; | |
12df843f | 16494 | LONGEST value; |
d521ce57 | 16495 | const gdb_byte *bytes; |
98bfdba5 | 16496 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 16497 | |
98bfdba5 PA |
16498 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
16499 | SYMBOL_PRINT_NAME (sym), | |
16500 | &objfile->objfile_obstack, cu, | |
16501 | &value, &bytes, &baton); | |
2df3850c | 16502 | |
98bfdba5 PA |
16503 | if (baton != NULL) |
16504 | { | |
98bfdba5 | 16505 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16506 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
16507 | } |
16508 | else if (bytes != NULL) | |
16509 | { | |
16510 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 16511 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
16512 | } |
16513 | else | |
16514 | { | |
16515 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 16516 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 16517 | } |
2df3850c JM |
16518 | } |
16519 | ||
c906108c SS |
16520 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
16521 | ||
16522 | static struct type * | |
e7c27a73 | 16523 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16524 | { |
c906108c | 16525 | struct attribute *type_attr; |
c906108c | 16526 | |
e142c38c | 16527 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
16528 | if (!type_attr) |
16529 | { | |
16530 | /* A missing DW_AT_type represents a void type. */ | |
46bf5051 | 16531 | return objfile_type (cu->objfile)->builtin_void; |
c906108c | 16532 | } |
348e048f | 16533 | |
673bfd45 | 16534 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16535 | } |
16536 | ||
b4ba55a1 JB |
16537 | /* True iff CU's producer generates GNAT Ada auxiliary information |
16538 | that allows to find parallel types through that information instead | |
16539 | of having to do expensive parallel lookups by type name. */ | |
16540 | ||
16541 | static int | |
16542 | need_gnat_info (struct dwarf2_cu *cu) | |
16543 | { | |
16544 | /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version | |
16545 | of GNAT produces this auxiliary information, without any indication | |
16546 | that it is produced. Part of enhancing the FSF version of GNAT | |
16547 | to produce that information will be to put in place an indicator | |
16548 | that we can use in order to determine whether the descriptive type | |
16549 | info is available or not. One suggestion that has been made is | |
16550 | to use a new attribute, attached to the CU die. For now, assume | |
16551 | that the descriptive type info is not available. */ | |
16552 | return 0; | |
16553 | } | |
16554 | ||
b4ba55a1 JB |
16555 | /* Return the auxiliary type of the die in question using its |
16556 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
16557 | attribute is not present. */ | |
16558 | ||
16559 | static struct type * | |
16560 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
16561 | { | |
b4ba55a1 | 16562 | struct attribute *type_attr; |
b4ba55a1 JB |
16563 | |
16564 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
16565 | if (!type_attr) | |
16566 | return NULL; | |
16567 | ||
673bfd45 | 16568 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
16569 | } |
16570 | ||
16571 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
16572 | descriptive type accordingly. */ | |
16573 | ||
16574 | static void | |
16575 | set_descriptive_type (struct type *type, struct die_info *die, | |
16576 | struct dwarf2_cu *cu) | |
16577 | { | |
16578 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
16579 | ||
16580 | if (descriptive_type) | |
16581 | { | |
16582 | ALLOCATE_GNAT_AUX_TYPE (type); | |
16583 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
16584 | } | |
16585 | } | |
16586 | ||
c906108c SS |
16587 | /* Return the containing type of the die in question using its |
16588 | DW_AT_containing_type attribute. */ | |
16589 | ||
16590 | static struct type * | |
e7c27a73 | 16591 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16592 | { |
c906108c | 16593 | struct attribute *type_attr; |
c906108c | 16594 | |
e142c38c | 16595 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
16596 | if (!type_attr) |
16597 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
16598 | "[in module %s]"), cu->objfile->name); | |
16599 | ||
673bfd45 | 16600 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
16601 | } |
16602 | ||
ac9ec31b DE |
16603 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
16604 | ||
16605 | static struct type * | |
16606 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
16607 | { | |
16608 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
16609 | char *message, *saved; | |
16610 | ||
16611 | message = xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"), | |
16612 | objfile->name, | |
16613 | cu->header.offset.sect_off, | |
16614 | die->offset.sect_off); | |
16615 | saved = obstack_copy0 (&objfile->objfile_obstack, | |
16616 | message, strlen (message)); | |
16617 | xfree (message); | |
16618 | ||
16619 | return init_type (TYPE_CODE_ERROR, 0, 0, saved, objfile); | |
16620 | } | |
16621 | ||
673bfd45 | 16622 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
16623 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
16624 | DW_AT_containing_type. | |
673bfd45 DE |
16625 | If there is no type substitute an error marker. */ |
16626 | ||
c906108c | 16627 | static struct type * |
673bfd45 DE |
16628 | lookup_die_type (struct die_info *die, struct attribute *attr, |
16629 | struct dwarf2_cu *cu) | |
c906108c | 16630 | { |
bb5ed363 | 16631 | struct objfile *objfile = cu->objfile; |
f792889a DJ |
16632 | struct type *this_type; |
16633 | ||
ac9ec31b DE |
16634 | gdb_assert (attr->name == DW_AT_type |
16635 | || attr->name == DW_AT_GNAT_descriptive_type | |
16636 | || attr->name == DW_AT_containing_type); | |
16637 | ||
673bfd45 DE |
16638 | /* First see if we have it cached. */ |
16639 | ||
36586728 TT |
16640 | if (attr->form == DW_FORM_GNU_ref_alt) |
16641 | { | |
16642 | struct dwarf2_per_cu_data *per_cu; | |
16643 | sect_offset offset = dwarf2_get_ref_die_offset (attr); | |
16644 | ||
16645 | per_cu = dwarf2_find_containing_comp_unit (offset, 1, cu->objfile); | |
16646 | this_type = get_die_type_at_offset (offset, per_cu); | |
16647 | } | |
16648 | else if (is_ref_attr (attr)) | |
673bfd45 | 16649 | { |
b64f50a1 | 16650 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
673bfd45 DE |
16651 | |
16652 | this_type = get_die_type_at_offset (offset, cu->per_cu); | |
16653 | } | |
55f1336d | 16654 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 16655 | { |
ac9ec31b | 16656 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 16657 | |
ac9ec31b | 16658 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
16659 | } |
16660 | else | |
16661 | { | |
ac9ec31b DE |
16662 | complaint (&symfile_complaints, |
16663 | _("Dwarf Error: Bad type attribute %s in DIE" | |
16664 | " at 0x%x [in module %s]"), | |
16665 | dwarf_attr_name (attr->name), die->offset.sect_off, | |
16666 | objfile->name); | |
16667 | return build_error_marker_type (cu, die); | |
673bfd45 DE |
16668 | } |
16669 | ||
16670 | /* If not cached we need to read it in. */ | |
16671 | ||
16672 | if (this_type == NULL) | |
16673 | { | |
ac9ec31b | 16674 | struct die_info *type_die = NULL; |
673bfd45 DE |
16675 | struct dwarf2_cu *type_cu = cu; |
16676 | ||
ac9ec31b DE |
16677 | if (is_ref_attr (attr)) |
16678 | type_die = follow_die_ref (die, attr, &type_cu); | |
16679 | if (type_die == NULL) | |
16680 | return build_error_marker_type (cu, die); | |
16681 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
16682 | from an inter-CU reference and the type's CU got expanded before |
16683 | ours. */ | |
ac9ec31b | 16684 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
16685 | } |
16686 | ||
16687 | /* If we still don't have a type use an error marker. */ | |
16688 | ||
16689 | if (this_type == NULL) | |
ac9ec31b | 16690 | return build_error_marker_type (cu, die); |
673bfd45 | 16691 | |
f792889a | 16692 | return this_type; |
c906108c SS |
16693 | } |
16694 | ||
673bfd45 DE |
16695 | /* Return the type in DIE, CU. |
16696 | Returns NULL for invalid types. | |
16697 | ||
02142a6c | 16698 | This first does a lookup in die_type_hash, |
673bfd45 DE |
16699 | and only reads the die in if necessary. |
16700 | ||
16701 | NOTE: This can be called when reading in partial or full symbols. */ | |
16702 | ||
f792889a | 16703 | static struct type * |
e7c27a73 | 16704 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16705 | { |
f792889a DJ |
16706 | struct type *this_type; |
16707 | ||
16708 | this_type = get_die_type (die, cu); | |
16709 | if (this_type) | |
16710 | return this_type; | |
16711 | ||
673bfd45 DE |
16712 | return read_type_die_1 (die, cu); |
16713 | } | |
16714 | ||
16715 | /* Read the type in DIE, CU. | |
16716 | Returns NULL for invalid types. */ | |
16717 | ||
16718 | static struct type * | |
16719 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
16720 | { | |
16721 | struct type *this_type = NULL; | |
16722 | ||
c906108c SS |
16723 | switch (die->tag) |
16724 | { | |
16725 | case DW_TAG_class_type: | |
680b30c7 | 16726 | case DW_TAG_interface_type: |
c906108c SS |
16727 | case DW_TAG_structure_type: |
16728 | case DW_TAG_union_type: | |
f792889a | 16729 | this_type = read_structure_type (die, cu); |
c906108c SS |
16730 | break; |
16731 | case DW_TAG_enumeration_type: | |
f792889a | 16732 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
16733 | break; |
16734 | case DW_TAG_subprogram: | |
16735 | case DW_TAG_subroutine_type: | |
edb3359d | 16736 | case DW_TAG_inlined_subroutine: |
f792889a | 16737 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
16738 | break; |
16739 | case DW_TAG_array_type: | |
f792889a | 16740 | this_type = read_array_type (die, cu); |
c906108c | 16741 | break; |
72019c9c | 16742 | case DW_TAG_set_type: |
f792889a | 16743 | this_type = read_set_type (die, cu); |
72019c9c | 16744 | break; |
c906108c | 16745 | case DW_TAG_pointer_type: |
f792889a | 16746 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
16747 | break; |
16748 | case DW_TAG_ptr_to_member_type: | |
f792889a | 16749 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
16750 | break; |
16751 | case DW_TAG_reference_type: | |
f792889a | 16752 | this_type = read_tag_reference_type (die, cu); |
c906108c SS |
16753 | break; |
16754 | case DW_TAG_const_type: | |
f792889a | 16755 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
16756 | break; |
16757 | case DW_TAG_volatile_type: | |
f792889a | 16758 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 16759 | break; |
06d66ee9 TT |
16760 | case DW_TAG_restrict_type: |
16761 | this_type = read_tag_restrict_type (die, cu); | |
16762 | break; | |
c906108c | 16763 | case DW_TAG_string_type: |
f792889a | 16764 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
16765 | break; |
16766 | case DW_TAG_typedef: | |
f792889a | 16767 | this_type = read_typedef (die, cu); |
c906108c | 16768 | break; |
a02abb62 | 16769 | case DW_TAG_subrange_type: |
f792889a | 16770 | this_type = read_subrange_type (die, cu); |
a02abb62 | 16771 | break; |
c906108c | 16772 | case DW_TAG_base_type: |
f792889a | 16773 | this_type = read_base_type (die, cu); |
c906108c | 16774 | break; |
81a17f79 | 16775 | case DW_TAG_unspecified_type: |
f792889a | 16776 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 16777 | break; |
0114d602 DJ |
16778 | case DW_TAG_namespace: |
16779 | this_type = read_namespace_type (die, cu); | |
16780 | break; | |
f55ee35c JK |
16781 | case DW_TAG_module: |
16782 | this_type = read_module_type (die, cu); | |
16783 | break; | |
c906108c | 16784 | default: |
3e43a32a MS |
16785 | complaint (&symfile_complaints, |
16786 | _("unexpected tag in read_type_die: '%s'"), | |
4d3c2250 | 16787 | dwarf_tag_name (die->tag)); |
c906108c SS |
16788 | break; |
16789 | } | |
63d06c5c | 16790 | |
f792889a | 16791 | return this_type; |
63d06c5c DC |
16792 | } |
16793 | ||
abc72ce4 DE |
16794 | /* See if we can figure out if the class lives in a namespace. We do |
16795 | this by looking for a member function; its demangled name will | |
16796 | contain namespace info, if there is any. | |
16797 | Return the computed name or NULL. | |
16798 | Space for the result is allocated on the objfile's obstack. | |
16799 | This is the full-die version of guess_partial_die_structure_name. | |
16800 | In this case we know DIE has no useful parent. */ | |
16801 | ||
16802 | static char * | |
16803 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) | |
16804 | { | |
16805 | struct die_info *spec_die; | |
16806 | struct dwarf2_cu *spec_cu; | |
16807 | struct die_info *child; | |
16808 | ||
16809 | spec_cu = cu; | |
16810 | spec_die = die_specification (die, &spec_cu); | |
16811 | if (spec_die != NULL) | |
16812 | { | |
16813 | die = spec_die; | |
16814 | cu = spec_cu; | |
16815 | } | |
16816 | ||
16817 | for (child = die->child; | |
16818 | child != NULL; | |
16819 | child = child->sibling) | |
16820 | { | |
16821 | if (child->tag == DW_TAG_subprogram) | |
16822 | { | |
16823 | struct attribute *attr; | |
16824 | ||
16825 | attr = dwarf2_attr (child, DW_AT_linkage_name, cu); | |
16826 | if (attr == NULL) | |
16827 | attr = dwarf2_attr (child, DW_AT_MIPS_linkage_name, cu); | |
16828 | if (attr != NULL) | |
16829 | { | |
16830 | char *actual_name | |
16831 | = language_class_name_from_physname (cu->language_defn, | |
16832 | DW_STRING (attr)); | |
16833 | char *name = NULL; | |
16834 | ||
16835 | if (actual_name != NULL) | |
16836 | { | |
15d034d0 | 16837 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
16838 | |
16839 | if (die_name != NULL | |
16840 | && strcmp (die_name, actual_name) != 0) | |
16841 | { | |
16842 | /* Strip off the class name from the full name. | |
16843 | We want the prefix. */ | |
16844 | int die_name_len = strlen (die_name); | |
16845 | int actual_name_len = strlen (actual_name); | |
16846 | ||
16847 | /* Test for '::' as a sanity check. */ | |
16848 | if (actual_name_len > die_name_len + 2 | |
3e43a32a MS |
16849 | && actual_name[actual_name_len |
16850 | - die_name_len - 1] == ':') | |
abc72ce4 | 16851 | name = |
10f0c4bb TT |
16852 | obstack_copy0 (&cu->objfile->objfile_obstack, |
16853 | actual_name, | |
16854 | actual_name_len - die_name_len - 2); | |
abc72ce4 DE |
16855 | } |
16856 | } | |
16857 | xfree (actual_name); | |
16858 | return name; | |
16859 | } | |
16860 | } | |
16861 | } | |
16862 | ||
16863 | return NULL; | |
16864 | } | |
16865 | ||
96408a79 SA |
16866 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
16867 | prefix part in such case. See | |
16868 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
16869 | ||
16870 | static char * | |
16871 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) | |
16872 | { | |
16873 | struct attribute *attr; | |
16874 | char *base; | |
16875 | ||
16876 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
16877 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
16878 | return NULL; | |
16879 | ||
16880 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
16881 | if (attr != NULL && DW_STRING (attr) != NULL) | |
16882 | return NULL; | |
16883 | ||
16884 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
16885 | if (attr == NULL) | |
16886 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
16887 | if (attr == NULL || DW_STRING (attr) == NULL) | |
16888 | return NULL; | |
16889 | ||
16890 | /* dwarf2_name had to be already called. */ | |
16891 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
16892 | ||
16893 | /* Strip the base name, keep any leading namespaces/classes. */ | |
16894 | base = strrchr (DW_STRING (attr), ':'); | |
16895 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
16896 | return ""; | |
16897 | ||
10f0c4bb TT |
16898 | return obstack_copy0 (&cu->objfile->objfile_obstack, |
16899 | DW_STRING (attr), &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
16900 | } |
16901 | ||
fdde2d81 | 16902 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 16903 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 16904 | |
0114d602 DJ |
16905 | For example, if we're within the method foo() in the following |
16906 | code: | |
16907 | ||
16908 | namespace N { | |
16909 | class C { | |
16910 | void foo () { | |
16911 | } | |
16912 | }; | |
16913 | } | |
16914 | ||
16915 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 16916 | |
0d5cff50 | 16917 | static const char * |
e142c38c | 16918 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 16919 | { |
0114d602 DJ |
16920 | struct die_info *parent, *spec_die; |
16921 | struct dwarf2_cu *spec_cu; | |
16922 | struct type *parent_type; | |
96408a79 | 16923 | char *retval; |
63d06c5c | 16924 | |
f55ee35c JK |
16925 | if (cu->language != language_cplus && cu->language != language_java |
16926 | && cu->language != language_fortran) | |
0114d602 DJ |
16927 | return ""; |
16928 | ||
96408a79 SA |
16929 | retval = anonymous_struct_prefix (die, cu); |
16930 | if (retval) | |
16931 | return retval; | |
16932 | ||
0114d602 DJ |
16933 | /* We have to be careful in the presence of DW_AT_specification. |
16934 | For example, with GCC 3.4, given the code | |
16935 | ||
16936 | namespace N { | |
16937 | void foo() { | |
16938 | // Definition of N::foo. | |
16939 | } | |
16940 | } | |
16941 | ||
16942 | then we'll have a tree of DIEs like this: | |
16943 | ||
16944 | 1: DW_TAG_compile_unit | |
16945 | 2: DW_TAG_namespace // N | |
16946 | 3: DW_TAG_subprogram // declaration of N::foo | |
16947 | 4: DW_TAG_subprogram // definition of N::foo | |
16948 | DW_AT_specification // refers to die #3 | |
16949 | ||
16950 | Thus, when processing die #4, we have to pretend that we're in | |
16951 | the context of its DW_AT_specification, namely the contex of die | |
16952 | #3. */ | |
16953 | spec_cu = cu; | |
16954 | spec_die = die_specification (die, &spec_cu); | |
16955 | if (spec_die == NULL) | |
16956 | parent = die->parent; | |
16957 | else | |
63d06c5c | 16958 | { |
0114d602 DJ |
16959 | parent = spec_die->parent; |
16960 | cu = spec_cu; | |
63d06c5c | 16961 | } |
0114d602 DJ |
16962 | |
16963 | if (parent == NULL) | |
16964 | return ""; | |
98bfdba5 PA |
16965 | else if (parent->building_fullname) |
16966 | { | |
16967 | const char *name; | |
16968 | const char *parent_name; | |
16969 | ||
16970 | /* It has been seen on RealView 2.2 built binaries, | |
16971 | DW_TAG_template_type_param types actually _defined_ as | |
16972 | children of the parent class: | |
16973 | ||
16974 | enum E {}; | |
16975 | template class <class Enum> Class{}; | |
16976 | Class<enum E> class_e; | |
16977 | ||
16978 | 1: DW_TAG_class_type (Class) | |
16979 | 2: DW_TAG_enumeration_type (E) | |
16980 | 3: DW_TAG_enumerator (enum1:0) | |
16981 | 3: DW_TAG_enumerator (enum2:1) | |
16982 | ... | |
16983 | 2: DW_TAG_template_type_param | |
16984 | DW_AT_type DW_FORM_ref_udata (E) | |
16985 | ||
16986 | Besides being broken debug info, it can put GDB into an | |
16987 | infinite loop. Consider: | |
16988 | ||
16989 | When we're building the full name for Class<E>, we'll start | |
16990 | at Class, and go look over its template type parameters, | |
16991 | finding E. We'll then try to build the full name of E, and | |
16992 | reach here. We're now trying to build the full name of E, | |
16993 | and look over the parent DIE for containing scope. In the | |
16994 | broken case, if we followed the parent DIE of E, we'd again | |
16995 | find Class, and once again go look at its template type | |
16996 | arguments, etc., etc. Simply don't consider such parent die | |
16997 | as source-level parent of this die (it can't be, the language | |
16998 | doesn't allow it), and break the loop here. */ | |
16999 | name = dwarf2_name (die, cu); | |
17000 | parent_name = dwarf2_name (parent, cu); | |
17001 | complaint (&symfile_complaints, | |
17002 | _("template param type '%s' defined within parent '%s'"), | |
17003 | name ? name : "<unknown>", | |
17004 | parent_name ? parent_name : "<unknown>"); | |
17005 | return ""; | |
17006 | } | |
63d06c5c | 17007 | else |
0114d602 DJ |
17008 | switch (parent->tag) |
17009 | { | |
63d06c5c | 17010 | case DW_TAG_namespace: |
0114d602 | 17011 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
17012 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
17013 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
17014 | Work around this problem here. */ | |
17015 | if (cu->language == language_cplus | |
17016 | && strcmp (TYPE_TAG_NAME (parent_type), "::") == 0) | |
17017 | return ""; | |
0114d602 DJ |
17018 | /* We give a name to even anonymous namespaces. */ |
17019 | return TYPE_TAG_NAME (parent_type); | |
63d06c5c | 17020 | case DW_TAG_class_type: |
680b30c7 | 17021 | case DW_TAG_interface_type: |
63d06c5c | 17022 | case DW_TAG_structure_type: |
0114d602 | 17023 | case DW_TAG_union_type: |
f55ee35c | 17024 | case DW_TAG_module: |
0114d602 DJ |
17025 | parent_type = read_type_die (parent, cu); |
17026 | if (TYPE_TAG_NAME (parent_type) != NULL) | |
17027 | return TYPE_TAG_NAME (parent_type); | |
17028 | else | |
17029 | /* An anonymous structure is only allowed non-static data | |
17030 | members; no typedefs, no member functions, et cetera. | |
17031 | So it does not need a prefix. */ | |
17032 | return ""; | |
abc72ce4 | 17033 | case DW_TAG_compile_unit: |
95554aad | 17034 | case DW_TAG_partial_unit: |
abc72ce4 DE |
17035 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
17036 | if (cu->language == language_cplus | |
8b70b953 | 17037 | && !VEC_empty (dwarf2_section_info_def, dwarf2_per_objfile->types) |
abc72ce4 DE |
17038 | && die->child != NULL |
17039 | && (die->tag == DW_TAG_class_type | |
17040 | || die->tag == DW_TAG_structure_type | |
17041 | || die->tag == DW_TAG_union_type)) | |
17042 | { | |
17043 | char *name = guess_full_die_structure_name (die, cu); | |
17044 | if (name != NULL) | |
17045 | return name; | |
17046 | } | |
17047 | return ""; | |
63d06c5c | 17048 | default: |
8176b9b8 | 17049 | return determine_prefix (parent, cu); |
63d06c5c | 17050 | } |
63d06c5c DC |
17051 | } |
17052 | ||
3e43a32a MS |
17053 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
17054 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
17055 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
17056 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
17057 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 17058 | |
f55ee35c | 17059 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
17060 | |
17061 | static char * | |
f55ee35c JK |
17062 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
17063 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 17064 | { |
f55ee35c | 17065 | const char *lead = ""; |
5c315b68 | 17066 | const char *sep; |
63d06c5c | 17067 | |
3e43a32a MS |
17068 | if (suffix == NULL || suffix[0] == '\0' |
17069 | || prefix == NULL || prefix[0] == '\0') | |
987504bb JJ |
17070 | sep = ""; |
17071 | else if (cu->language == language_java) | |
17072 | sep = "."; | |
f55ee35c JK |
17073 | else if (cu->language == language_fortran && physname) |
17074 | { | |
17075 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
17076 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
17077 | ||
17078 | lead = "__"; | |
17079 | sep = "_MOD_"; | |
17080 | } | |
987504bb JJ |
17081 | else |
17082 | sep = "::"; | |
63d06c5c | 17083 | |
6dd47d34 DE |
17084 | if (prefix == NULL) |
17085 | prefix = ""; | |
17086 | if (suffix == NULL) | |
17087 | suffix = ""; | |
17088 | ||
987504bb JJ |
17089 | if (obs == NULL) |
17090 | { | |
3e43a32a MS |
17091 | char *retval |
17092 | = xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1); | |
9a619af0 | 17093 | |
f55ee35c JK |
17094 | strcpy (retval, lead); |
17095 | strcat (retval, prefix); | |
6dd47d34 DE |
17096 | strcat (retval, sep); |
17097 | strcat (retval, suffix); | |
63d06c5c DC |
17098 | return retval; |
17099 | } | |
987504bb JJ |
17100 | else |
17101 | { | |
17102 | /* We have an obstack. */ | |
f55ee35c | 17103 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 17104 | } |
63d06c5c DC |
17105 | } |
17106 | ||
c906108c SS |
17107 | /* Return sibling of die, NULL if no sibling. */ |
17108 | ||
f9aca02d | 17109 | static struct die_info * |
fba45db2 | 17110 | sibling_die (struct die_info *die) |
c906108c | 17111 | { |
639d11d3 | 17112 | return die->sibling; |
c906108c SS |
17113 | } |
17114 | ||
71c25dea TT |
17115 | /* Get name of a die, return NULL if not found. */ |
17116 | ||
15d034d0 TT |
17117 | static const char * |
17118 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
17119 | struct obstack *obstack) |
17120 | { | |
17121 | if (name && cu->language == language_cplus) | |
17122 | { | |
17123 | char *canon_name = cp_canonicalize_string (name); | |
17124 | ||
17125 | if (canon_name != NULL) | |
17126 | { | |
17127 | if (strcmp (canon_name, name) != 0) | |
10f0c4bb | 17128 | name = obstack_copy0 (obstack, canon_name, strlen (canon_name)); |
71c25dea TT |
17129 | xfree (canon_name); |
17130 | } | |
17131 | } | |
17132 | ||
17133 | return name; | |
c906108c SS |
17134 | } |
17135 | ||
9219021c DC |
17136 | /* Get name of a die, return NULL if not found. */ |
17137 | ||
15d034d0 | 17138 | static const char * |
e142c38c | 17139 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
17140 | { |
17141 | struct attribute *attr; | |
17142 | ||
e142c38c | 17143 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 TT |
17144 | if ((!attr || !DW_STRING (attr)) |
17145 | && die->tag != DW_TAG_class_type | |
17146 | && die->tag != DW_TAG_interface_type | |
17147 | && die->tag != DW_TAG_structure_type | |
17148 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
17149 | return NULL; |
17150 | ||
17151 | switch (die->tag) | |
17152 | { | |
17153 | case DW_TAG_compile_unit: | |
95554aad | 17154 | case DW_TAG_partial_unit: |
71c25dea TT |
17155 | /* Compilation units have a DW_AT_name that is a filename, not |
17156 | a source language identifier. */ | |
17157 | case DW_TAG_enumeration_type: | |
17158 | case DW_TAG_enumerator: | |
17159 | /* These tags always have simple identifiers already; no need | |
17160 | to canonicalize them. */ | |
17161 | return DW_STRING (attr); | |
907af001 | 17162 | |
418835cc KS |
17163 | case DW_TAG_subprogram: |
17164 | /* Java constructors will all be named "<init>", so return | |
17165 | the class name when we see this special case. */ | |
17166 | if (cu->language == language_java | |
17167 | && DW_STRING (attr) != NULL | |
17168 | && strcmp (DW_STRING (attr), "<init>") == 0) | |
17169 | { | |
17170 | struct dwarf2_cu *spec_cu = cu; | |
17171 | struct die_info *spec_die; | |
17172 | ||
17173 | /* GCJ will output '<init>' for Java constructor names. | |
17174 | For this special case, return the name of the parent class. */ | |
17175 | ||
17176 | /* GCJ may output suprogram DIEs with AT_specification set. | |
17177 | If so, use the name of the specified DIE. */ | |
17178 | spec_die = die_specification (die, &spec_cu); | |
17179 | if (spec_die != NULL) | |
17180 | return dwarf2_name (spec_die, spec_cu); | |
17181 | ||
17182 | do | |
17183 | { | |
17184 | die = die->parent; | |
17185 | if (die->tag == DW_TAG_class_type) | |
17186 | return dwarf2_name (die, cu); | |
17187 | } | |
95554aad TT |
17188 | while (die->tag != DW_TAG_compile_unit |
17189 | && die->tag != DW_TAG_partial_unit); | |
418835cc | 17190 | } |
907af001 UW |
17191 | break; |
17192 | ||
17193 | case DW_TAG_class_type: | |
17194 | case DW_TAG_interface_type: | |
17195 | case DW_TAG_structure_type: | |
17196 | case DW_TAG_union_type: | |
17197 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
17198 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
17199 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
17200 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 TT |
17201 | if (attr && DW_STRING (attr) |
17202 | && (strncmp (DW_STRING (attr), "._", 2) == 0 | |
17203 | || strncmp (DW_STRING (attr), "<anonymous", 10) == 0)) | |
907af001 | 17204 | return NULL; |
53832f31 TT |
17205 | |
17206 | /* GCC might emit a nameless typedef that has a linkage name. See | |
17207 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
17208 | if (!attr || DW_STRING (attr) == NULL) | |
17209 | { | |
df5c6c50 | 17210 | char *demangled = NULL; |
53832f31 TT |
17211 | |
17212 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
17213 | if (attr == NULL) | |
17214 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
17215 | ||
17216 | if (attr == NULL || DW_STRING (attr) == NULL) | |
17217 | return NULL; | |
17218 | ||
df5c6c50 JK |
17219 | /* Avoid demangling DW_STRING (attr) the second time on a second |
17220 | call for the same DIE. */ | |
17221 | if (!DW_STRING_IS_CANONICAL (attr)) | |
8de20a37 | 17222 | demangled = gdb_demangle (DW_STRING (attr), DMGL_TYPES); |
53832f31 TT |
17223 | |
17224 | if (demangled) | |
17225 | { | |
96408a79 SA |
17226 | char *base; |
17227 | ||
53832f31 | 17228 | /* FIXME: we already did this for the partial symbol... */ |
10f0c4bb TT |
17229 | DW_STRING (attr) = obstack_copy0 (&cu->objfile->objfile_obstack, |
17230 | demangled, strlen (demangled)); | |
53832f31 TT |
17231 | DW_STRING_IS_CANONICAL (attr) = 1; |
17232 | xfree (demangled); | |
96408a79 SA |
17233 | |
17234 | /* Strip any leading namespaces/classes, keep only the base name. | |
17235 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
17236 | base = strrchr (DW_STRING (attr), ':'); | |
17237 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
17238 | return &base[1]; | |
17239 | else | |
17240 | return DW_STRING (attr); | |
53832f31 TT |
17241 | } |
17242 | } | |
907af001 UW |
17243 | break; |
17244 | ||
71c25dea | 17245 | default: |
907af001 UW |
17246 | break; |
17247 | } | |
17248 | ||
17249 | if (!DW_STRING_IS_CANONICAL (attr)) | |
17250 | { | |
17251 | DW_STRING (attr) | |
17252 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
17253 | &cu->objfile->objfile_obstack); | |
17254 | DW_STRING_IS_CANONICAL (attr) = 1; | |
71c25dea | 17255 | } |
907af001 | 17256 | return DW_STRING (attr); |
9219021c DC |
17257 | } |
17258 | ||
17259 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
17260 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
17261 | containing the return value on output. */ | |
9219021c DC |
17262 | |
17263 | static struct die_info * | |
f2f0e013 | 17264 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
17265 | { |
17266 | struct attribute *attr; | |
9219021c | 17267 | |
f2f0e013 | 17268 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
17269 | if (attr == NULL) |
17270 | return NULL; | |
17271 | ||
f2f0e013 | 17272 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
17273 | } |
17274 | ||
c906108c SS |
17275 | /* Convert a DIE tag into its string name. */ |
17276 | ||
f39c6ffd | 17277 | static const char * |
aa1ee363 | 17278 | dwarf_tag_name (unsigned tag) |
c906108c | 17279 | { |
f39c6ffd TT |
17280 | const char *name = get_DW_TAG_name (tag); |
17281 | ||
17282 | if (name == NULL) | |
17283 | return "DW_TAG_<unknown>"; | |
17284 | ||
17285 | return name; | |
c906108c SS |
17286 | } |
17287 | ||
17288 | /* Convert a DWARF attribute code into its string name. */ | |
17289 | ||
f39c6ffd | 17290 | static const char * |
aa1ee363 | 17291 | dwarf_attr_name (unsigned attr) |
c906108c | 17292 | { |
f39c6ffd TT |
17293 | const char *name; |
17294 | ||
c764a876 | 17295 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
17296 | if (attr == DW_AT_MIPS_fde) |
17297 | return "DW_AT_MIPS_fde"; | |
17298 | #else | |
17299 | if (attr == DW_AT_HP_block_index) | |
17300 | return "DW_AT_HP_block_index"; | |
c764a876 | 17301 | #endif |
f39c6ffd TT |
17302 | |
17303 | name = get_DW_AT_name (attr); | |
17304 | ||
17305 | if (name == NULL) | |
17306 | return "DW_AT_<unknown>"; | |
17307 | ||
17308 | return name; | |
c906108c SS |
17309 | } |
17310 | ||
17311 | /* Convert a DWARF value form code into its string name. */ | |
17312 | ||
f39c6ffd | 17313 | static const char * |
aa1ee363 | 17314 | dwarf_form_name (unsigned form) |
c906108c | 17315 | { |
f39c6ffd TT |
17316 | const char *name = get_DW_FORM_name (form); |
17317 | ||
17318 | if (name == NULL) | |
17319 | return "DW_FORM_<unknown>"; | |
17320 | ||
17321 | return name; | |
c906108c SS |
17322 | } |
17323 | ||
17324 | static char * | |
fba45db2 | 17325 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
17326 | { |
17327 | if (mybool) | |
17328 | return "TRUE"; | |
17329 | else | |
17330 | return "FALSE"; | |
17331 | } | |
17332 | ||
17333 | /* Convert a DWARF type code into its string name. */ | |
17334 | ||
f39c6ffd | 17335 | static const char * |
aa1ee363 | 17336 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 17337 | { |
f39c6ffd | 17338 | const char *name = get_DW_ATE_name (enc); |
c906108c | 17339 | |
f39c6ffd TT |
17340 | if (name == NULL) |
17341 | return "DW_ATE_<unknown>"; | |
c906108c | 17342 | |
f39c6ffd | 17343 | return name; |
c906108c | 17344 | } |
c906108c | 17345 | |
f9aca02d | 17346 | static void |
d97bc12b | 17347 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
17348 | { |
17349 | unsigned int i; | |
17350 | ||
d97bc12b DE |
17351 | print_spaces (indent, f); |
17352 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset 0x%x)\n", | |
b64f50a1 | 17353 | dwarf_tag_name (die->tag), die->abbrev, die->offset.sect_off); |
d97bc12b DE |
17354 | |
17355 | if (die->parent != NULL) | |
17356 | { | |
17357 | print_spaces (indent, f); | |
17358 | fprintf_unfiltered (f, " parent at offset: 0x%x\n", | |
b64f50a1 | 17359 | die->parent->offset.sect_off); |
d97bc12b DE |
17360 | } |
17361 | ||
17362 | print_spaces (indent, f); | |
17363 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 17364 | dwarf_bool_name (die->child != NULL)); |
c906108c | 17365 | |
d97bc12b DE |
17366 | print_spaces (indent, f); |
17367 | fprintf_unfiltered (f, " attributes:\n"); | |
17368 | ||
c906108c SS |
17369 | for (i = 0; i < die->num_attrs; ++i) |
17370 | { | |
d97bc12b DE |
17371 | print_spaces (indent, f); |
17372 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
17373 | dwarf_attr_name (die->attrs[i].name), |
17374 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 17375 | |
c906108c SS |
17376 | switch (die->attrs[i].form) |
17377 | { | |
c906108c | 17378 | case DW_FORM_addr: |
3019eac3 | 17379 | case DW_FORM_GNU_addr_index: |
d97bc12b | 17380 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 17381 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
17382 | break; |
17383 | case DW_FORM_block2: | |
17384 | case DW_FORM_block4: | |
17385 | case DW_FORM_block: | |
17386 | case DW_FORM_block1: | |
56eb65bd SP |
17387 | fprintf_unfiltered (f, "block: size %s", |
17388 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 17389 | break; |
2dc7f7b3 | 17390 | case DW_FORM_exprloc: |
56eb65bd SP |
17391 | fprintf_unfiltered (f, "expression: size %s", |
17392 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 17393 | break; |
4568ecf9 DE |
17394 | case DW_FORM_ref_addr: |
17395 | fprintf_unfiltered (f, "ref address: "); | |
17396 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17397 | break; | |
36586728 TT |
17398 | case DW_FORM_GNU_ref_alt: |
17399 | fprintf_unfiltered (f, "alt ref address: "); | |
17400 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
17401 | break; | |
10b3939b DJ |
17402 | case DW_FORM_ref1: |
17403 | case DW_FORM_ref2: | |
17404 | case DW_FORM_ref4: | |
4568ecf9 DE |
17405 | case DW_FORM_ref8: |
17406 | case DW_FORM_ref_udata: | |
d97bc12b | 17407 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 17408 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 17409 | break; |
c906108c SS |
17410 | case DW_FORM_data1: |
17411 | case DW_FORM_data2: | |
17412 | case DW_FORM_data4: | |
ce5d95e1 | 17413 | case DW_FORM_data8: |
c906108c SS |
17414 | case DW_FORM_udata: |
17415 | case DW_FORM_sdata: | |
43bbcdc2 PH |
17416 | fprintf_unfiltered (f, "constant: %s", |
17417 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 17418 | break; |
2dc7f7b3 TT |
17419 | case DW_FORM_sec_offset: |
17420 | fprintf_unfiltered (f, "section offset: %s", | |
17421 | pulongest (DW_UNSND (&die->attrs[i]))); | |
17422 | break; | |
55f1336d | 17423 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
17424 | fprintf_unfiltered (f, "signature: %s", |
17425 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 17426 | break; |
c906108c | 17427 | case DW_FORM_string: |
4bdf3d34 | 17428 | case DW_FORM_strp: |
3019eac3 | 17429 | case DW_FORM_GNU_str_index: |
36586728 | 17430 | case DW_FORM_GNU_strp_alt: |
8285870a | 17431 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 17432 | DW_STRING (&die->attrs[i]) |
8285870a JK |
17433 | ? DW_STRING (&die->attrs[i]) : "", |
17434 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
17435 | break; |
17436 | case DW_FORM_flag: | |
17437 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 17438 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 17439 | else |
d97bc12b | 17440 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 17441 | break; |
2dc7f7b3 TT |
17442 | case DW_FORM_flag_present: |
17443 | fprintf_unfiltered (f, "flag: TRUE"); | |
17444 | break; | |
a8329558 | 17445 | case DW_FORM_indirect: |
0963b4bd MS |
17446 | /* The reader will have reduced the indirect form to |
17447 | the "base form" so this form should not occur. */ | |
3e43a32a MS |
17448 | fprintf_unfiltered (f, |
17449 | "unexpected attribute form: DW_FORM_indirect"); | |
a8329558 | 17450 | break; |
c906108c | 17451 | default: |
d97bc12b | 17452 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 17453 | die->attrs[i].form); |
d97bc12b | 17454 | break; |
c906108c | 17455 | } |
d97bc12b | 17456 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
17457 | } |
17458 | } | |
17459 | ||
f9aca02d | 17460 | static void |
d97bc12b | 17461 | dump_die_for_error (struct die_info *die) |
c906108c | 17462 | { |
d97bc12b DE |
17463 | dump_die_shallow (gdb_stderr, 0, die); |
17464 | } | |
17465 | ||
17466 | static void | |
17467 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
17468 | { | |
17469 | int indent = level * 4; | |
17470 | ||
17471 | gdb_assert (die != NULL); | |
17472 | ||
17473 | if (level >= max_level) | |
17474 | return; | |
17475 | ||
17476 | dump_die_shallow (f, indent, die); | |
17477 | ||
17478 | if (die->child != NULL) | |
c906108c | 17479 | { |
d97bc12b DE |
17480 | print_spaces (indent, f); |
17481 | fprintf_unfiltered (f, " Children:"); | |
17482 | if (level + 1 < max_level) | |
17483 | { | |
17484 | fprintf_unfiltered (f, "\n"); | |
17485 | dump_die_1 (f, level + 1, max_level, die->child); | |
17486 | } | |
17487 | else | |
17488 | { | |
3e43a32a MS |
17489 | fprintf_unfiltered (f, |
17490 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
17491 | } |
17492 | } | |
17493 | ||
17494 | if (die->sibling != NULL && level > 0) | |
17495 | { | |
17496 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
17497 | } |
17498 | } | |
17499 | ||
d97bc12b DE |
17500 | /* This is called from the pdie macro in gdbinit.in. |
17501 | It's not static so gcc will keep a copy callable from gdb. */ | |
17502 | ||
17503 | void | |
17504 | dump_die (struct die_info *die, int max_level) | |
17505 | { | |
17506 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
17507 | } | |
17508 | ||
f9aca02d | 17509 | static void |
51545339 | 17510 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17511 | { |
51545339 | 17512 | void **slot; |
c906108c | 17513 | |
b64f50a1 JK |
17514 | slot = htab_find_slot_with_hash (cu->die_hash, die, die->offset.sect_off, |
17515 | INSERT); | |
51545339 DJ |
17516 | |
17517 | *slot = die; | |
c906108c SS |
17518 | } |
17519 | ||
b64f50a1 JK |
17520 | /* DW_ADDR is always stored already as sect_offset; despite for the forms |
17521 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
17522 | ||
93311388 DE |
17523 | static int |
17524 | is_ref_attr (struct attribute *attr) | |
c906108c | 17525 | { |
c906108c SS |
17526 | switch (attr->form) |
17527 | { | |
17528 | case DW_FORM_ref_addr: | |
c906108c SS |
17529 | case DW_FORM_ref1: |
17530 | case DW_FORM_ref2: | |
17531 | case DW_FORM_ref4: | |
613e1657 | 17532 | case DW_FORM_ref8: |
c906108c | 17533 | case DW_FORM_ref_udata: |
36586728 | 17534 | case DW_FORM_GNU_ref_alt: |
93311388 | 17535 | return 1; |
c906108c | 17536 | default: |
93311388 | 17537 | return 0; |
c906108c | 17538 | } |
93311388 DE |
17539 | } |
17540 | ||
b64f50a1 JK |
17541 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
17542 | required kind. */ | |
17543 | ||
17544 | static sect_offset | |
93311388 DE |
17545 | dwarf2_get_ref_die_offset (struct attribute *attr) |
17546 | { | |
4568ecf9 | 17547 | sect_offset retval = { DW_UNSND (attr) }; |
b64f50a1 | 17548 | |
93311388 | 17549 | if (is_ref_attr (attr)) |
b64f50a1 | 17550 | return retval; |
93311388 | 17551 | |
b64f50a1 | 17552 | retval.sect_off = 0; |
93311388 DE |
17553 | complaint (&symfile_complaints, |
17554 | _("unsupported die ref attribute form: '%s'"), | |
17555 | dwarf_form_name (attr->form)); | |
b64f50a1 | 17556 | return retval; |
c906108c SS |
17557 | } |
17558 | ||
43bbcdc2 PH |
17559 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
17560 | * the value held by the attribute is not constant. */ | |
a02abb62 | 17561 | |
43bbcdc2 | 17562 | static LONGEST |
a02abb62 JB |
17563 | dwarf2_get_attr_constant_value (struct attribute *attr, int default_value) |
17564 | { | |
17565 | if (attr->form == DW_FORM_sdata) | |
17566 | return DW_SND (attr); | |
17567 | else if (attr->form == DW_FORM_udata | |
17568 | || attr->form == DW_FORM_data1 | |
17569 | || attr->form == DW_FORM_data2 | |
17570 | || attr->form == DW_FORM_data4 | |
17571 | || attr->form == DW_FORM_data8) | |
17572 | return DW_UNSND (attr); | |
17573 | else | |
17574 | { | |
3e43a32a MS |
17575 | complaint (&symfile_complaints, |
17576 | _("Attribute value is not a constant (%s)"), | |
a02abb62 JB |
17577 | dwarf_form_name (attr->form)); |
17578 | return default_value; | |
17579 | } | |
17580 | } | |
17581 | ||
348e048f DE |
17582 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
17583 | On entry *REF_CU is the CU of SRC_DIE. | |
17584 | On exit *REF_CU is the CU of the result. */ | |
17585 | ||
17586 | static struct die_info * | |
17587 | follow_die_ref_or_sig (struct die_info *src_die, struct attribute *attr, | |
17588 | struct dwarf2_cu **ref_cu) | |
17589 | { | |
17590 | struct die_info *die; | |
17591 | ||
17592 | if (is_ref_attr (attr)) | |
17593 | die = follow_die_ref (src_die, attr, ref_cu); | |
55f1336d | 17594 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
17595 | die = follow_die_sig (src_die, attr, ref_cu); |
17596 | else | |
17597 | { | |
17598 | dump_die_for_error (src_die); | |
17599 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
17600 | (*ref_cu)->objfile->name); | |
17601 | } | |
17602 | ||
17603 | return die; | |
03dd20cc DJ |
17604 | } |
17605 | ||
5c631832 | 17606 | /* Follow reference OFFSET. |
673bfd45 DE |
17607 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
17608 | On exit *REF_CU is the CU of the result. | |
17609 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 17610 | |
f9aca02d | 17611 | static struct die_info * |
36586728 TT |
17612 | follow_die_offset (sect_offset offset, int offset_in_dwz, |
17613 | struct dwarf2_cu **ref_cu) | |
c906108c | 17614 | { |
10b3939b | 17615 | struct die_info temp_die; |
f2f0e013 | 17616 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
10b3939b | 17617 | |
348e048f DE |
17618 | gdb_assert (cu->per_cu != NULL); |
17619 | ||
98bfdba5 PA |
17620 | target_cu = cu; |
17621 | ||
3019eac3 | 17622 | if (cu->per_cu->is_debug_types) |
348e048f DE |
17623 | { |
17624 | /* .debug_types CUs cannot reference anything outside their CU. | |
17625 | If they need to, they have to reference a signatured type via | |
55f1336d | 17626 | DW_FORM_ref_sig8. */ |
348e048f | 17627 | if (! offset_in_cu_p (&cu->header, offset)) |
5c631832 | 17628 | return NULL; |
348e048f | 17629 | } |
36586728 TT |
17630 | else if (offset_in_dwz != cu->per_cu->is_dwz |
17631 | || ! offset_in_cu_p (&cu->header, offset)) | |
10b3939b DJ |
17632 | { |
17633 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 17634 | |
36586728 TT |
17635 | per_cu = dwarf2_find_containing_comp_unit (offset, offset_in_dwz, |
17636 | cu->objfile); | |
03dd20cc DJ |
17637 | |
17638 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad TT |
17639 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
17640 | load_full_comp_unit (per_cu, cu->language); | |
03dd20cc | 17641 | |
10b3939b DJ |
17642 | target_cu = per_cu->cu; |
17643 | } | |
98bfdba5 PA |
17644 | else if (cu->dies == NULL) |
17645 | { | |
17646 | /* We're loading full DIEs during partial symbol reading. */ | |
17647 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
95554aad | 17648 | load_full_comp_unit (cu->per_cu, language_minimal); |
98bfdba5 | 17649 | } |
c906108c | 17650 | |
f2f0e013 | 17651 | *ref_cu = target_cu; |
51545339 | 17652 | temp_die.offset = offset; |
b64f50a1 | 17653 | return htab_find_with_hash (target_cu->die_hash, &temp_die, offset.sect_off); |
5c631832 | 17654 | } |
10b3939b | 17655 | |
5c631832 JK |
17656 | /* Follow reference attribute ATTR of SRC_DIE. |
17657 | On entry *REF_CU is the CU of SRC_DIE. | |
17658 | On exit *REF_CU is the CU of the result. */ | |
17659 | ||
17660 | static struct die_info * | |
17661 | follow_die_ref (struct die_info *src_die, struct attribute *attr, | |
17662 | struct dwarf2_cu **ref_cu) | |
17663 | { | |
b64f50a1 | 17664 | sect_offset offset = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
17665 | struct dwarf2_cu *cu = *ref_cu; |
17666 | struct die_info *die; | |
17667 | ||
36586728 TT |
17668 | die = follow_die_offset (offset, |
17669 | (attr->form == DW_FORM_GNU_ref_alt | |
17670 | || cu->per_cu->is_dwz), | |
17671 | ref_cu); | |
5c631832 JK |
17672 | if (!die) |
17673 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE " | |
17674 | "at 0x%x [in module %s]"), | |
b64f50a1 | 17675 | offset.sect_off, src_die->offset.sect_off, cu->objfile->name); |
348e048f | 17676 | |
5c631832 JK |
17677 | return die; |
17678 | } | |
17679 | ||
d83e736b JK |
17680 | /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU. |
17681 | Returned value is intended for DW_OP_call*. Returned | |
17682 | dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */ | |
5c631832 JK |
17683 | |
17684 | struct dwarf2_locexpr_baton | |
8b9737bf TT |
17685 | dwarf2_fetch_die_loc_sect_off (sect_offset offset, |
17686 | struct dwarf2_per_cu_data *per_cu, | |
17687 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17688 | void *baton) | |
5c631832 | 17689 | { |
918dd910 | 17690 | struct dwarf2_cu *cu; |
5c631832 JK |
17691 | struct die_info *die; |
17692 | struct attribute *attr; | |
17693 | struct dwarf2_locexpr_baton retval; | |
17694 | ||
8cf6f0b1 TT |
17695 | dw2_setup (per_cu->objfile); |
17696 | ||
918dd910 JK |
17697 | if (per_cu->cu == NULL) |
17698 | load_cu (per_cu); | |
17699 | cu = per_cu->cu; | |
17700 | ||
36586728 | 17701 | die = follow_die_offset (offset, per_cu->is_dwz, &cu); |
5c631832 JK |
17702 | if (!die) |
17703 | error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"), | |
b64f50a1 | 17704 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17705 | |
17706 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
17707 | if (!attr) | |
17708 | { | |
e103e986 JK |
17709 | /* DWARF: "If there is no such attribute, then there is no effect.". |
17710 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 17711 | |
e103e986 | 17712 | retval.data = NULL; |
5c631832 JK |
17713 | retval.size = 0; |
17714 | } | |
8cf6f0b1 TT |
17715 | else if (attr_form_is_section_offset (attr)) |
17716 | { | |
17717 | struct dwarf2_loclist_baton loclist_baton; | |
17718 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
17719 | size_t size; | |
17720 | ||
17721 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
17722 | ||
17723 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
17724 | &size, pc); | |
17725 | retval.size = size; | |
17726 | } | |
5c631832 JK |
17727 | else |
17728 | { | |
17729 | if (!attr_form_is_block (attr)) | |
17730 | error (_("Dwarf Error: DIE at 0x%x referenced in module %s " | |
17731 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), | |
b64f50a1 | 17732 | offset.sect_off, per_cu->objfile->name); |
5c631832 JK |
17733 | |
17734 | retval.data = DW_BLOCK (attr)->data; | |
17735 | retval.size = DW_BLOCK (attr)->size; | |
17736 | } | |
17737 | retval.per_cu = cu->per_cu; | |
918dd910 | 17738 | |
918dd910 JK |
17739 | age_cached_comp_units (); |
17740 | ||
5c631832 | 17741 | return retval; |
348e048f DE |
17742 | } |
17743 | ||
8b9737bf TT |
17744 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
17745 | offset. */ | |
17746 | ||
17747 | struct dwarf2_locexpr_baton | |
17748 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
17749 | struct dwarf2_per_cu_data *per_cu, | |
17750 | CORE_ADDR (*get_frame_pc) (void *baton), | |
17751 | void *baton) | |
17752 | { | |
17753 | sect_offset offset = { per_cu->offset.sect_off + offset_in_cu.cu_off }; | |
17754 | ||
17755 | return dwarf2_fetch_die_loc_sect_off (offset, per_cu, get_frame_pc, baton); | |
17756 | } | |
17757 | ||
8a9b8146 TT |
17758 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
17759 | PER_CU. */ | |
17760 | ||
17761 | struct type * | |
b64f50a1 | 17762 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
17763 | struct dwarf2_per_cu_data *per_cu) |
17764 | { | |
b64f50a1 JK |
17765 | sect_offset die_offset_sect; |
17766 | ||
8a9b8146 | 17767 | dw2_setup (per_cu->objfile); |
b64f50a1 JK |
17768 | |
17769 | die_offset_sect.sect_off = per_cu->offset.sect_off + die_offset.cu_off; | |
17770 | return get_die_type_at_offset (die_offset_sect, per_cu); | |
8a9b8146 TT |
17771 | } |
17772 | ||
ac9ec31b | 17773 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 17774 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
17775 | On exit *REF_CU is the CU of the result. |
17776 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
17777 | |
17778 | static struct die_info * | |
ac9ec31b DE |
17779 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
17780 | struct dwarf2_cu **ref_cu) | |
348e048f DE |
17781 | { |
17782 | struct objfile *objfile = (*ref_cu)->objfile; | |
17783 | struct die_info temp_die; | |
348e048f DE |
17784 | struct dwarf2_cu *sig_cu; |
17785 | struct die_info *die; | |
17786 | ||
ac9ec31b DE |
17787 | /* While it might be nice to assert sig_type->type == NULL here, |
17788 | we can get here for DW_AT_imported_declaration where we need | |
17789 | the DIE not the type. */ | |
348e048f DE |
17790 | |
17791 | /* If necessary, add it to the queue and load its DIEs. */ | |
17792 | ||
95554aad | 17793 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 17794 | read_signatured_type (sig_type); |
348e048f DE |
17795 | |
17796 | gdb_assert (sig_type->per_cu.cu != NULL); | |
17797 | ||
17798 | sig_cu = sig_type->per_cu.cu; | |
3019eac3 DE |
17799 | gdb_assert (sig_type->type_offset_in_section.sect_off != 0); |
17800 | temp_die.offset = sig_type->type_offset_in_section; | |
b64f50a1 JK |
17801 | die = htab_find_with_hash (sig_cu->die_hash, &temp_die, |
17802 | temp_die.offset.sect_off); | |
348e048f DE |
17803 | if (die) |
17804 | { | |
796a7ff8 DE |
17805 | /* For .gdb_index version 7 keep track of included TUs. |
17806 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
17807 | if (dwarf2_per_objfile->index_table != NULL | |
17808 | && dwarf2_per_objfile->index_table->version <= 7) | |
17809 | { | |
17810 | VEC_safe_push (dwarf2_per_cu_ptr, | |
17811 | (*ref_cu)->per_cu->imported_symtabs, | |
17812 | sig_cu->per_cu); | |
17813 | } | |
17814 | ||
348e048f DE |
17815 | *ref_cu = sig_cu; |
17816 | return die; | |
17817 | } | |
17818 | ||
ac9ec31b DE |
17819 | return NULL; |
17820 | } | |
17821 | ||
17822 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
17823 | On entry *REF_CU is the CU of SRC_DIE. | |
17824 | On exit *REF_CU is the CU of the result. | |
17825 | The result is the DIE of the type. | |
17826 | If the referenced type cannot be found an error is thrown. */ | |
17827 | ||
17828 | static struct die_info * | |
17829 | follow_die_sig (struct die_info *src_die, struct attribute *attr, | |
17830 | struct dwarf2_cu **ref_cu) | |
17831 | { | |
17832 | ULONGEST signature = DW_SIGNATURE (attr); | |
17833 | struct signatured_type *sig_type; | |
17834 | struct die_info *die; | |
17835 | ||
17836 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
17837 | ||
17838 | sig_type = lookup_signatured_type (signature); | |
17839 | /* sig_type will be NULL if the signatured type is missing from | |
17840 | the debug info. */ | |
17841 | if (sig_type == NULL) | |
17842 | { | |
17843 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
17844 | " from DIE at 0x%x [in module %s]"), | |
17845 | hex_string (signature), src_die->offset.sect_off, | |
17846 | (*ref_cu)->objfile->name); | |
17847 | } | |
17848 | ||
17849 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
17850 | if (die == NULL) | |
17851 | { | |
17852 | dump_die_for_error (src_die); | |
17853 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
17854 | " from DIE at 0x%x [in module %s]"), | |
17855 | hex_string (signature), src_die->offset.sect_off, | |
17856 | (*ref_cu)->objfile->name); | |
17857 | } | |
17858 | ||
17859 | return die; | |
17860 | } | |
17861 | ||
17862 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
17863 | reading in and processing the type unit if necessary. */ | |
17864 | ||
17865 | static struct type * | |
17866 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
17867 | struct dwarf2_cu *cu) | |
17868 | { | |
17869 | struct signatured_type *sig_type; | |
17870 | struct dwarf2_cu *type_cu; | |
17871 | struct die_info *type_die; | |
17872 | struct type *type; | |
17873 | ||
17874 | sig_type = lookup_signatured_type (signature); | |
17875 | /* sig_type will be NULL if the signatured type is missing from | |
17876 | the debug info. */ | |
17877 | if (sig_type == NULL) | |
17878 | { | |
17879 | complaint (&symfile_complaints, | |
17880 | _("Dwarf Error: Cannot find signatured DIE %s referenced" | |
17881 | " from DIE at 0x%x [in module %s]"), | |
17882 | hex_string (signature), die->offset.sect_off, | |
17883 | dwarf2_per_objfile->objfile->name); | |
17884 | return build_error_marker_type (cu, die); | |
17885 | } | |
17886 | ||
17887 | /* If we already know the type we're done. */ | |
17888 | if (sig_type->type != NULL) | |
17889 | return sig_type->type; | |
17890 | ||
17891 | type_cu = cu; | |
17892 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
17893 | if (type_die != NULL) | |
17894 | { | |
17895 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
17896 | is created. This is important, for example, because for c++ classes | |
17897 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
17898 | type = read_type_die (type_die, type_cu); | |
17899 | if (type == NULL) | |
17900 | { | |
17901 | complaint (&symfile_complaints, | |
17902 | _("Dwarf Error: Cannot build signatured type %s" | |
17903 | " referenced from DIE at 0x%x [in module %s]"), | |
17904 | hex_string (signature), die->offset.sect_off, | |
17905 | dwarf2_per_objfile->objfile->name); | |
17906 | type = build_error_marker_type (cu, die); | |
17907 | } | |
17908 | } | |
17909 | else | |
17910 | { | |
17911 | complaint (&symfile_complaints, | |
17912 | _("Dwarf Error: Problem reading signatured DIE %s referenced" | |
17913 | " from DIE at 0x%x [in module %s]"), | |
17914 | hex_string (signature), die->offset.sect_off, | |
17915 | dwarf2_per_objfile->objfile->name); | |
17916 | type = build_error_marker_type (cu, die); | |
17917 | } | |
17918 | sig_type->type = type; | |
17919 | ||
17920 | return type; | |
17921 | } | |
17922 | ||
17923 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
17924 | reading in and processing the type unit if necessary. */ | |
17925 | ||
17926 | static struct type * | |
17927 | get_DW_AT_signature_type (struct die_info *die, struct attribute *attr, | |
17928 | struct dwarf2_cu *cu) | |
17929 | { | |
17930 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
17931 | if (is_ref_attr (attr)) | |
17932 | { | |
17933 | struct dwarf2_cu *type_cu = cu; | |
17934 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
17935 | ||
17936 | return read_type_die (type_die, type_cu); | |
17937 | } | |
17938 | else if (attr->form == DW_FORM_ref_sig8) | |
17939 | { | |
17940 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
17941 | } | |
17942 | else | |
17943 | { | |
17944 | complaint (&symfile_complaints, | |
17945 | _("Dwarf Error: DW_AT_signature has bad form %s in DIE" | |
17946 | " at 0x%x [in module %s]"), | |
17947 | dwarf_form_name (attr->form), die->offset.sect_off, | |
17948 | dwarf2_per_objfile->objfile->name); | |
17949 | return build_error_marker_type (cu, die); | |
17950 | } | |
348e048f DE |
17951 | } |
17952 | ||
e5fe5e75 | 17953 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
17954 | |
17955 | static void | |
e5fe5e75 | 17956 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 17957 | { |
52dc124a | 17958 | struct signatured_type *sig_type; |
348e048f | 17959 | |
f4dc4d17 DE |
17960 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
17961 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
17962 | ||
6721b2ec DE |
17963 | /* We have the per_cu, but we need the signatured_type. |
17964 | Fortunately this is an easy translation. */ | |
17965 | gdb_assert (per_cu->is_debug_types); | |
17966 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 17967 | |
6721b2ec | 17968 | gdb_assert (per_cu->cu == NULL); |
348e048f | 17969 | |
52dc124a | 17970 | read_signatured_type (sig_type); |
348e048f | 17971 | |
6721b2ec | 17972 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
17973 | } |
17974 | ||
dee91e82 DE |
17975 | /* die_reader_func for read_signatured_type. |
17976 | This is identical to load_full_comp_unit_reader, | |
17977 | but is kept separate for now. */ | |
348e048f DE |
17978 | |
17979 | static void | |
dee91e82 | 17980 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 17981 | const gdb_byte *info_ptr, |
dee91e82 DE |
17982 | struct die_info *comp_unit_die, |
17983 | int has_children, | |
17984 | void *data) | |
348e048f | 17985 | { |
dee91e82 | 17986 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 17987 | |
dee91e82 DE |
17988 | gdb_assert (cu->die_hash == NULL); |
17989 | cu->die_hash = | |
17990 | htab_create_alloc_ex (cu->header.length / 12, | |
17991 | die_hash, | |
17992 | die_eq, | |
17993 | NULL, | |
17994 | &cu->comp_unit_obstack, | |
17995 | hashtab_obstack_allocate, | |
17996 | dummy_obstack_deallocate); | |
348e048f | 17997 | |
dee91e82 DE |
17998 | if (has_children) |
17999 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
18000 | &info_ptr, comp_unit_die); | |
18001 | cu->dies = comp_unit_die; | |
18002 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
18003 | |
18004 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 18005 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 18006 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
18007 | or we won't be able to build types correctly. |
18008 | Similarly, if we do not read the producer, we can not apply | |
18009 | producer-specific interpretation. */ | |
95554aad | 18010 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 18011 | } |
348e048f | 18012 | |
3019eac3 DE |
18013 | /* Read in a signatured type and build its CU and DIEs. |
18014 | If the type is a stub for the real type in a DWO file, | |
18015 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
18016 | |
18017 | static void | |
18018 | read_signatured_type (struct signatured_type *sig_type) | |
18019 | { | |
18020 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 18021 | |
3019eac3 | 18022 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 18023 | gdb_assert (per_cu->cu == NULL); |
348e048f | 18024 | |
f4dc4d17 DE |
18025 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, |
18026 | read_signatured_type_reader, NULL); | |
c906108c SS |
18027 | } |
18028 | ||
c906108c SS |
18029 | /* Decode simple location descriptions. |
18030 | Given a pointer to a dwarf block that defines a location, compute | |
18031 | the location and return the value. | |
18032 | ||
4cecd739 DJ |
18033 | NOTE drow/2003-11-18: This function is called in two situations |
18034 | now: for the address of static or global variables (partial symbols | |
18035 | only) and for offsets into structures which are expected to be | |
18036 | (more or less) constant. The partial symbol case should go away, | |
18037 | and only the constant case should remain. That will let this | |
18038 | function complain more accurately. A few special modes are allowed | |
18039 | without complaint for global variables (for instance, global | |
18040 | register values and thread-local values). | |
c906108c SS |
18041 | |
18042 | A location description containing no operations indicates that the | |
4cecd739 | 18043 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
18044 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
18045 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
18046 | complaint. |
18047 | ||
18048 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
18049 | |
18050 | static CORE_ADDR | |
e7c27a73 | 18051 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 18052 | { |
e7c27a73 | 18053 | struct objfile *objfile = cu->objfile; |
56eb65bd SP |
18054 | size_t i; |
18055 | size_t size = blk->size; | |
d521ce57 | 18056 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
18057 | CORE_ADDR stack[64]; |
18058 | int stacki; | |
18059 | unsigned int bytes_read, unsnd; | |
18060 | gdb_byte op; | |
c906108c | 18061 | |
21ae7a4d JK |
18062 | i = 0; |
18063 | stacki = 0; | |
18064 | stack[stacki] = 0; | |
18065 | stack[++stacki] = 0; | |
18066 | ||
18067 | while (i < size) | |
18068 | { | |
18069 | op = data[i++]; | |
18070 | switch (op) | |
18071 | { | |
18072 | case DW_OP_lit0: | |
18073 | case DW_OP_lit1: | |
18074 | case DW_OP_lit2: | |
18075 | case DW_OP_lit3: | |
18076 | case DW_OP_lit4: | |
18077 | case DW_OP_lit5: | |
18078 | case DW_OP_lit6: | |
18079 | case DW_OP_lit7: | |
18080 | case DW_OP_lit8: | |
18081 | case DW_OP_lit9: | |
18082 | case DW_OP_lit10: | |
18083 | case DW_OP_lit11: | |
18084 | case DW_OP_lit12: | |
18085 | case DW_OP_lit13: | |
18086 | case DW_OP_lit14: | |
18087 | case DW_OP_lit15: | |
18088 | case DW_OP_lit16: | |
18089 | case DW_OP_lit17: | |
18090 | case DW_OP_lit18: | |
18091 | case DW_OP_lit19: | |
18092 | case DW_OP_lit20: | |
18093 | case DW_OP_lit21: | |
18094 | case DW_OP_lit22: | |
18095 | case DW_OP_lit23: | |
18096 | case DW_OP_lit24: | |
18097 | case DW_OP_lit25: | |
18098 | case DW_OP_lit26: | |
18099 | case DW_OP_lit27: | |
18100 | case DW_OP_lit28: | |
18101 | case DW_OP_lit29: | |
18102 | case DW_OP_lit30: | |
18103 | case DW_OP_lit31: | |
18104 | stack[++stacki] = op - DW_OP_lit0; | |
18105 | break; | |
f1bea926 | 18106 | |
21ae7a4d JK |
18107 | case DW_OP_reg0: |
18108 | case DW_OP_reg1: | |
18109 | case DW_OP_reg2: | |
18110 | case DW_OP_reg3: | |
18111 | case DW_OP_reg4: | |
18112 | case DW_OP_reg5: | |
18113 | case DW_OP_reg6: | |
18114 | case DW_OP_reg7: | |
18115 | case DW_OP_reg8: | |
18116 | case DW_OP_reg9: | |
18117 | case DW_OP_reg10: | |
18118 | case DW_OP_reg11: | |
18119 | case DW_OP_reg12: | |
18120 | case DW_OP_reg13: | |
18121 | case DW_OP_reg14: | |
18122 | case DW_OP_reg15: | |
18123 | case DW_OP_reg16: | |
18124 | case DW_OP_reg17: | |
18125 | case DW_OP_reg18: | |
18126 | case DW_OP_reg19: | |
18127 | case DW_OP_reg20: | |
18128 | case DW_OP_reg21: | |
18129 | case DW_OP_reg22: | |
18130 | case DW_OP_reg23: | |
18131 | case DW_OP_reg24: | |
18132 | case DW_OP_reg25: | |
18133 | case DW_OP_reg26: | |
18134 | case DW_OP_reg27: | |
18135 | case DW_OP_reg28: | |
18136 | case DW_OP_reg29: | |
18137 | case DW_OP_reg30: | |
18138 | case DW_OP_reg31: | |
18139 | stack[++stacki] = op - DW_OP_reg0; | |
18140 | if (i < size) | |
18141 | dwarf2_complex_location_expr_complaint (); | |
18142 | break; | |
c906108c | 18143 | |
21ae7a4d JK |
18144 | case DW_OP_regx: |
18145 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
18146 | i += bytes_read; | |
18147 | stack[++stacki] = unsnd; | |
18148 | if (i < size) | |
18149 | dwarf2_complex_location_expr_complaint (); | |
18150 | break; | |
c906108c | 18151 | |
21ae7a4d JK |
18152 | case DW_OP_addr: |
18153 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
18154 | cu, &bytes_read); | |
18155 | i += bytes_read; | |
18156 | break; | |
d53d4ac5 | 18157 | |
21ae7a4d JK |
18158 | case DW_OP_const1u: |
18159 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
18160 | i += 1; | |
18161 | break; | |
18162 | ||
18163 | case DW_OP_const1s: | |
18164 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
18165 | i += 1; | |
18166 | break; | |
18167 | ||
18168 | case DW_OP_const2u: | |
18169 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
18170 | i += 2; | |
18171 | break; | |
18172 | ||
18173 | case DW_OP_const2s: | |
18174 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
18175 | i += 2; | |
18176 | break; | |
d53d4ac5 | 18177 | |
21ae7a4d JK |
18178 | case DW_OP_const4u: |
18179 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
18180 | i += 4; | |
18181 | break; | |
18182 | ||
18183 | case DW_OP_const4s: | |
18184 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
18185 | i += 4; | |
18186 | break; | |
18187 | ||
585861ea JK |
18188 | case DW_OP_const8u: |
18189 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
18190 | i += 8; | |
18191 | break; | |
18192 | ||
21ae7a4d JK |
18193 | case DW_OP_constu: |
18194 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
18195 | &bytes_read); | |
18196 | i += bytes_read; | |
18197 | break; | |
18198 | ||
18199 | case DW_OP_consts: | |
18200 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
18201 | i += bytes_read; | |
18202 | break; | |
18203 | ||
18204 | case DW_OP_dup: | |
18205 | stack[stacki + 1] = stack[stacki]; | |
18206 | stacki++; | |
18207 | break; | |
18208 | ||
18209 | case DW_OP_plus: | |
18210 | stack[stacki - 1] += stack[stacki]; | |
18211 | stacki--; | |
18212 | break; | |
18213 | ||
18214 | case DW_OP_plus_uconst: | |
18215 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
18216 | &bytes_read); | |
18217 | i += bytes_read; | |
18218 | break; | |
18219 | ||
18220 | case DW_OP_minus: | |
18221 | stack[stacki - 1] -= stack[stacki]; | |
18222 | stacki--; | |
18223 | break; | |
18224 | ||
18225 | case DW_OP_deref: | |
18226 | /* If we're not the last op, then we definitely can't encode | |
18227 | this using GDB's address_class enum. This is valid for partial | |
18228 | global symbols, although the variable's address will be bogus | |
18229 | in the psymtab. */ | |
18230 | if (i < size) | |
18231 | dwarf2_complex_location_expr_complaint (); | |
18232 | break; | |
18233 | ||
18234 | case DW_OP_GNU_push_tls_address: | |
18235 | /* The top of the stack has the offset from the beginning | |
18236 | of the thread control block at which the variable is located. */ | |
18237 | /* Nothing should follow this operator, so the top of stack would | |
18238 | be returned. */ | |
18239 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
18240 | address will be bogus in the psymtab. Make it always at least |
18241 | non-zero to not look as a variable garbage collected by linker | |
18242 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
18243 | if (i < size) |
18244 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 18245 | stack[stacki]++; |
21ae7a4d JK |
18246 | break; |
18247 | ||
18248 | case DW_OP_GNU_uninit: | |
18249 | break; | |
18250 | ||
3019eac3 | 18251 | case DW_OP_GNU_addr_index: |
49f6c839 | 18252 | case DW_OP_GNU_const_index: |
3019eac3 DE |
18253 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
18254 | &bytes_read); | |
18255 | i += bytes_read; | |
18256 | break; | |
18257 | ||
21ae7a4d JK |
18258 | default: |
18259 | { | |
f39c6ffd | 18260 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
18261 | |
18262 | if (name) | |
18263 | complaint (&symfile_complaints, _("unsupported stack op: '%s'"), | |
18264 | name); | |
18265 | else | |
18266 | complaint (&symfile_complaints, _("unsupported stack op: '%02x'"), | |
18267 | op); | |
18268 | } | |
18269 | ||
18270 | return (stack[stacki]); | |
d53d4ac5 | 18271 | } |
3c6e0cb3 | 18272 | |
21ae7a4d JK |
18273 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
18274 | outside of the allocated space. Also enforce minimum>0. */ | |
18275 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
18276 | { | |
18277 | complaint (&symfile_complaints, | |
18278 | _("location description stack overflow")); | |
18279 | return 0; | |
18280 | } | |
18281 | ||
18282 | if (stacki <= 0) | |
18283 | { | |
18284 | complaint (&symfile_complaints, | |
18285 | _("location description stack underflow")); | |
18286 | return 0; | |
18287 | } | |
18288 | } | |
18289 | return (stack[stacki]); | |
c906108c SS |
18290 | } |
18291 | ||
18292 | /* memory allocation interface */ | |
18293 | ||
c906108c | 18294 | static struct dwarf_block * |
7b5a2f43 | 18295 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c SS |
18296 | { |
18297 | struct dwarf_block *blk; | |
18298 | ||
18299 | blk = (struct dwarf_block *) | |
7b5a2f43 | 18300 | obstack_alloc (&cu->comp_unit_obstack, sizeof (struct dwarf_block)); |
c906108c SS |
18301 | return (blk); |
18302 | } | |
18303 | ||
c906108c | 18304 | static struct die_info * |
b60c80d6 | 18305 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
18306 | { |
18307 | struct die_info *die; | |
b60c80d6 DJ |
18308 | size_t size = sizeof (struct die_info); |
18309 | ||
18310 | if (num_attrs > 1) | |
18311 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 18312 | |
b60c80d6 | 18313 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
18314 | memset (die, 0, sizeof (struct die_info)); |
18315 | return (die); | |
18316 | } | |
2e276125 JB |
18317 | |
18318 | \f | |
18319 | /* Macro support. */ | |
18320 | ||
233d95b5 JK |
18321 | /* Return file name relative to the compilation directory of file number I in |
18322 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 18323 | responsible for freeing it. */ |
233d95b5 | 18324 | |
2e276125 | 18325 | static char * |
233d95b5 | 18326 | file_file_name (int file, struct line_header *lh) |
2e276125 | 18327 | { |
6a83a1e6 EZ |
18328 | /* Is the file number a valid index into the line header's file name |
18329 | table? Remember that file numbers start with one, not zero. */ | |
18330 | if (1 <= file && file <= lh->num_file_names) | |
18331 | { | |
18332 | struct file_entry *fe = &lh->file_names[file - 1]; | |
6e70227d | 18333 | |
233d95b5 | 18334 | if (IS_ABSOLUTE_PATH (fe->name) || fe->dir_index == 0) |
6a83a1e6 | 18335 | return xstrdup (fe->name); |
233d95b5 JK |
18336 | return concat (lh->include_dirs[fe->dir_index - 1], SLASH_STRING, |
18337 | fe->name, NULL); | |
6a83a1e6 | 18338 | } |
2e276125 JB |
18339 | else |
18340 | { | |
6a83a1e6 EZ |
18341 | /* The compiler produced a bogus file number. We can at least |
18342 | record the macro definitions made in the file, even if we | |
18343 | won't be able to find the file by name. */ | |
18344 | char fake_name[80]; | |
9a619af0 | 18345 | |
8c042590 PM |
18346 | xsnprintf (fake_name, sizeof (fake_name), |
18347 | "<bad macro file number %d>", file); | |
2e276125 | 18348 | |
6e70227d | 18349 | complaint (&symfile_complaints, |
6a83a1e6 EZ |
18350 | _("bad file number in macro information (%d)"), |
18351 | file); | |
2e276125 | 18352 | |
6a83a1e6 | 18353 | return xstrdup (fake_name); |
2e276125 JB |
18354 | } |
18355 | } | |
18356 | ||
233d95b5 JK |
18357 | /* Return the full name of file number I in *LH's file name table. |
18358 | Use COMP_DIR as the name of the current directory of the | |
18359 | compilation. The result is allocated using xmalloc; the caller is | |
18360 | responsible for freeing it. */ | |
18361 | static char * | |
18362 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
18363 | { | |
18364 | /* Is the file number a valid index into the line header's file name | |
18365 | table? Remember that file numbers start with one, not zero. */ | |
18366 | if (1 <= file && file <= lh->num_file_names) | |
18367 | { | |
18368 | char *relative = file_file_name (file, lh); | |
18369 | ||
18370 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
18371 | return relative; | |
18372 | return reconcat (relative, comp_dir, SLASH_STRING, relative, NULL); | |
18373 | } | |
18374 | else | |
18375 | return file_file_name (file, lh); | |
18376 | } | |
18377 | ||
2e276125 JB |
18378 | |
18379 | static struct macro_source_file * | |
18380 | macro_start_file (int file, int line, | |
18381 | struct macro_source_file *current_file, | |
18382 | const char *comp_dir, | |
18383 | struct line_header *lh, struct objfile *objfile) | |
18384 | { | |
233d95b5 JK |
18385 | /* File name relative to the compilation directory of this source file. */ |
18386 | char *file_name = file_file_name (file, lh); | |
2e276125 JB |
18387 | |
18388 | /* We don't create a macro table for this compilation unit | |
18389 | at all until we actually get a filename. */ | |
18390 | if (! pending_macros) | |
6532ff36 | 18391 | pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack, |
233d95b5 JK |
18392 | objfile->per_bfd->macro_cache, |
18393 | comp_dir); | |
2e276125 JB |
18394 | |
18395 | if (! current_file) | |
abc9d0dc TT |
18396 | { |
18397 | /* If we have no current file, then this must be the start_file | |
18398 | directive for the compilation unit's main source file. */ | |
233d95b5 | 18399 | current_file = macro_set_main (pending_macros, file_name); |
abc9d0dc TT |
18400 | macro_define_special (pending_macros); |
18401 | } | |
2e276125 | 18402 | else |
233d95b5 | 18403 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 18404 | |
233d95b5 | 18405 | xfree (file_name); |
6e70227d | 18406 | |
2e276125 JB |
18407 | return current_file; |
18408 | } | |
18409 | ||
18410 | ||
18411 | /* Copy the LEN characters at BUF to a xmalloc'ed block of memory, | |
18412 | followed by a null byte. */ | |
18413 | static char * | |
18414 | copy_string (const char *buf, int len) | |
18415 | { | |
18416 | char *s = xmalloc (len + 1); | |
9a619af0 | 18417 | |
2e276125 JB |
18418 | memcpy (s, buf, len); |
18419 | s[len] = '\0'; | |
2e276125 JB |
18420 | return s; |
18421 | } | |
18422 | ||
18423 | ||
18424 | static const char * | |
18425 | consume_improper_spaces (const char *p, const char *body) | |
18426 | { | |
18427 | if (*p == ' ') | |
18428 | { | |
4d3c2250 | 18429 | complaint (&symfile_complaints, |
3e43a32a MS |
18430 | _("macro definition contains spaces " |
18431 | "in formal argument list:\n`%s'"), | |
4d3c2250 | 18432 | body); |
2e276125 JB |
18433 | |
18434 | while (*p == ' ') | |
18435 | p++; | |
18436 | } | |
18437 | ||
18438 | return p; | |
18439 | } | |
18440 | ||
18441 | ||
18442 | static void | |
18443 | parse_macro_definition (struct macro_source_file *file, int line, | |
18444 | const char *body) | |
18445 | { | |
18446 | const char *p; | |
18447 | ||
18448 | /* The body string takes one of two forms. For object-like macro | |
18449 | definitions, it should be: | |
18450 | ||
18451 | <macro name> " " <definition> | |
18452 | ||
18453 | For function-like macro definitions, it should be: | |
18454 | ||
18455 | <macro name> "() " <definition> | |
18456 | or | |
18457 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
18458 | ||
18459 | Spaces may appear only where explicitly indicated, and in the | |
18460 | <definition>. | |
18461 | ||
18462 | The Dwarf 2 spec says that an object-like macro's name is always | |
18463 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 18464 | the space when the macro's definition is the empty string. |
2e276125 JB |
18465 | |
18466 | The Dwarf 2 spec says that there should be no spaces between the | |
18467 | formal arguments in a function-like macro's formal argument list, | |
18468 | but versions of GCC around March 2002 include spaces after the | |
18469 | commas. */ | |
18470 | ||
18471 | ||
18472 | /* Find the extent of the macro name. The macro name is terminated | |
18473 | by either a space or null character (for an object-like macro) or | |
18474 | an opening paren (for a function-like macro). */ | |
18475 | for (p = body; *p; p++) | |
18476 | if (*p == ' ' || *p == '(') | |
18477 | break; | |
18478 | ||
18479 | if (*p == ' ' || *p == '\0') | |
18480 | { | |
18481 | /* It's an object-like macro. */ | |
18482 | int name_len = p - body; | |
18483 | char *name = copy_string (body, name_len); | |
18484 | const char *replacement; | |
18485 | ||
18486 | if (*p == ' ') | |
18487 | replacement = body + name_len + 1; | |
18488 | else | |
18489 | { | |
4d3c2250 | 18490 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18491 | replacement = body + name_len; |
18492 | } | |
6e70227d | 18493 | |
2e276125 JB |
18494 | macro_define_object (file, line, name, replacement); |
18495 | ||
18496 | xfree (name); | |
18497 | } | |
18498 | else if (*p == '(') | |
18499 | { | |
18500 | /* It's a function-like macro. */ | |
18501 | char *name = copy_string (body, p - body); | |
18502 | int argc = 0; | |
18503 | int argv_size = 1; | |
18504 | char **argv = xmalloc (argv_size * sizeof (*argv)); | |
18505 | ||
18506 | p++; | |
18507 | ||
18508 | p = consume_improper_spaces (p, body); | |
18509 | ||
18510 | /* Parse the formal argument list. */ | |
18511 | while (*p && *p != ')') | |
18512 | { | |
18513 | /* Find the extent of the current argument name. */ | |
18514 | const char *arg_start = p; | |
18515 | ||
18516 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
18517 | p++; | |
18518 | ||
18519 | if (! *p || p == arg_start) | |
4d3c2250 | 18520 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18521 | else |
18522 | { | |
18523 | /* Make sure argv has room for the new argument. */ | |
18524 | if (argc >= argv_size) | |
18525 | { | |
18526 | argv_size *= 2; | |
18527 | argv = xrealloc (argv, argv_size * sizeof (*argv)); | |
18528 | } | |
18529 | ||
18530 | argv[argc++] = copy_string (arg_start, p - arg_start); | |
18531 | } | |
18532 | ||
18533 | p = consume_improper_spaces (p, body); | |
18534 | ||
18535 | /* Consume the comma, if present. */ | |
18536 | if (*p == ',') | |
18537 | { | |
18538 | p++; | |
18539 | ||
18540 | p = consume_improper_spaces (p, body); | |
18541 | } | |
18542 | } | |
18543 | ||
18544 | if (*p == ')') | |
18545 | { | |
18546 | p++; | |
18547 | ||
18548 | if (*p == ' ') | |
18549 | /* Perfectly formed definition, no complaints. */ | |
18550 | macro_define_function (file, line, name, | |
6e70227d | 18551 | argc, (const char **) argv, |
2e276125 JB |
18552 | p + 1); |
18553 | else if (*p == '\0') | |
18554 | { | |
18555 | /* Complain, but do define it. */ | |
4d3c2250 | 18556 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 18557 | macro_define_function (file, line, name, |
6e70227d | 18558 | argc, (const char **) argv, |
2e276125 JB |
18559 | p); |
18560 | } | |
18561 | else | |
18562 | /* Just complain. */ | |
4d3c2250 | 18563 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18564 | } |
18565 | else | |
18566 | /* Just complain. */ | |
4d3c2250 | 18567 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18568 | |
18569 | xfree (name); | |
18570 | { | |
18571 | int i; | |
18572 | ||
18573 | for (i = 0; i < argc; i++) | |
18574 | xfree (argv[i]); | |
18575 | } | |
18576 | xfree (argv); | |
18577 | } | |
18578 | else | |
4d3c2250 | 18579 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
18580 | } |
18581 | ||
cf2c3c16 TT |
18582 | /* Skip some bytes from BYTES according to the form given in FORM. |
18583 | Returns the new pointer. */ | |
2e276125 | 18584 | |
d521ce57 TT |
18585 | static const gdb_byte * |
18586 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
18587 | enum dwarf_form form, |
18588 | unsigned int offset_size, | |
18589 | struct dwarf2_section_info *section) | |
2e276125 | 18590 | { |
cf2c3c16 | 18591 | unsigned int bytes_read; |
2e276125 | 18592 | |
cf2c3c16 | 18593 | switch (form) |
2e276125 | 18594 | { |
cf2c3c16 TT |
18595 | case DW_FORM_data1: |
18596 | case DW_FORM_flag: | |
18597 | ++bytes; | |
18598 | break; | |
18599 | ||
18600 | case DW_FORM_data2: | |
18601 | bytes += 2; | |
18602 | break; | |
18603 | ||
18604 | case DW_FORM_data4: | |
18605 | bytes += 4; | |
18606 | break; | |
18607 | ||
18608 | case DW_FORM_data8: | |
18609 | bytes += 8; | |
18610 | break; | |
18611 | ||
18612 | case DW_FORM_string: | |
18613 | read_direct_string (abfd, bytes, &bytes_read); | |
18614 | bytes += bytes_read; | |
18615 | break; | |
18616 | ||
18617 | case DW_FORM_sec_offset: | |
18618 | case DW_FORM_strp: | |
36586728 | 18619 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
18620 | bytes += offset_size; |
18621 | break; | |
18622 | ||
18623 | case DW_FORM_block: | |
18624 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
18625 | bytes += bytes_read; | |
18626 | break; | |
18627 | ||
18628 | case DW_FORM_block1: | |
18629 | bytes += 1 + read_1_byte (abfd, bytes); | |
18630 | break; | |
18631 | case DW_FORM_block2: | |
18632 | bytes += 2 + read_2_bytes (abfd, bytes); | |
18633 | break; | |
18634 | case DW_FORM_block4: | |
18635 | bytes += 4 + read_4_bytes (abfd, bytes); | |
18636 | break; | |
18637 | ||
18638 | case DW_FORM_sdata: | |
18639 | case DW_FORM_udata: | |
3019eac3 DE |
18640 | case DW_FORM_GNU_addr_index: |
18641 | case DW_FORM_GNU_str_index: | |
d521ce57 | 18642 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
18643 | if (bytes == NULL) |
18644 | { | |
18645 | dwarf2_section_buffer_overflow_complaint (section); | |
18646 | return NULL; | |
18647 | } | |
cf2c3c16 TT |
18648 | break; |
18649 | ||
18650 | default: | |
18651 | { | |
18652 | complain: | |
18653 | complaint (&symfile_complaints, | |
18654 | _("invalid form 0x%x in `%s'"), | |
18655 | form, | |
18656 | section->asection->name); | |
18657 | return NULL; | |
18658 | } | |
2e276125 JB |
18659 | } |
18660 | ||
cf2c3c16 TT |
18661 | return bytes; |
18662 | } | |
757a13d0 | 18663 | |
cf2c3c16 TT |
18664 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
18665 | opcode. Returns an updated pointer to the macro data buffer; or, | |
18666 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 18667 | |
d521ce57 | 18668 | static const gdb_byte * |
cf2c3c16 | 18669 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
18670 | const gdb_byte **opcode_definitions, |
18671 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
18672 | bfd *abfd, |
18673 | unsigned int offset_size, | |
18674 | struct dwarf2_section_info *section) | |
18675 | { | |
18676 | unsigned int bytes_read, i; | |
18677 | unsigned long arg; | |
d521ce57 | 18678 | const gdb_byte *defn; |
2e276125 | 18679 | |
cf2c3c16 | 18680 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 18681 | { |
cf2c3c16 TT |
18682 | complaint (&symfile_complaints, |
18683 | _("unrecognized DW_MACFINO opcode 0x%x"), | |
18684 | opcode); | |
18685 | return NULL; | |
18686 | } | |
2e276125 | 18687 | |
cf2c3c16 TT |
18688 | defn = opcode_definitions[opcode]; |
18689 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
18690 | defn += bytes_read; | |
2e276125 | 18691 | |
cf2c3c16 TT |
18692 | for (i = 0; i < arg; ++i) |
18693 | { | |
f664829e DE |
18694 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, defn[i], offset_size, |
18695 | section); | |
cf2c3c16 TT |
18696 | if (mac_ptr == NULL) |
18697 | { | |
18698 | /* skip_form_bytes already issued the complaint. */ | |
18699 | return NULL; | |
18700 | } | |
18701 | } | |
757a13d0 | 18702 | |
cf2c3c16 TT |
18703 | return mac_ptr; |
18704 | } | |
757a13d0 | 18705 | |
cf2c3c16 TT |
18706 | /* A helper function which parses the header of a macro section. |
18707 | If the macro section is the extended (for now called "GNU") type, | |
18708 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
18709 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 18710 | |
d521ce57 TT |
18711 | static const gdb_byte * |
18712 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 18713 | bfd *abfd, |
d521ce57 | 18714 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
18715 | unsigned int *offset_size, |
18716 | int section_is_gnu) | |
18717 | { | |
18718 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 18719 | |
cf2c3c16 TT |
18720 | if (section_is_gnu) |
18721 | { | |
18722 | unsigned int version, flags; | |
757a13d0 | 18723 | |
cf2c3c16 TT |
18724 | version = read_2_bytes (abfd, mac_ptr); |
18725 | if (version != 4) | |
18726 | { | |
18727 | complaint (&symfile_complaints, | |
18728 | _("unrecognized version `%d' in .debug_macro section"), | |
18729 | version); | |
18730 | return NULL; | |
18731 | } | |
18732 | mac_ptr += 2; | |
757a13d0 | 18733 | |
cf2c3c16 TT |
18734 | flags = read_1_byte (abfd, mac_ptr); |
18735 | ++mac_ptr; | |
18736 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 18737 | |
cf2c3c16 TT |
18738 | if ((flags & 2) != 0) |
18739 | /* We don't need the line table offset. */ | |
18740 | mac_ptr += *offset_size; | |
757a13d0 | 18741 | |
cf2c3c16 TT |
18742 | /* Vendor opcode descriptions. */ |
18743 | if ((flags & 4) != 0) | |
18744 | { | |
18745 | unsigned int i, count; | |
757a13d0 | 18746 | |
cf2c3c16 TT |
18747 | count = read_1_byte (abfd, mac_ptr); |
18748 | ++mac_ptr; | |
18749 | for (i = 0; i < count; ++i) | |
18750 | { | |
18751 | unsigned int opcode, bytes_read; | |
18752 | unsigned long arg; | |
18753 | ||
18754 | opcode = read_1_byte (abfd, mac_ptr); | |
18755 | ++mac_ptr; | |
18756 | opcode_definitions[opcode] = mac_ptr; | |
18757 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18758 | mac_ptr += bytes_read; | |
18759 | mac_ptr += arg; | |
18760 | } | |
757a13d0 | 18761 | } |
cf2c3c16 | 18762 | } |
757a13d0 | 18763 | |
cf2c3c16 TT |
18764 | return mac_ptr; |
18765 | } | |
757a13d0 | 18766 | |
cf2c3c16 | 18767 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
8fc3fc34 | 18768 | including DW_MACRO_GNU_transparent_include. */ |
cf2c3c16 TT |
18769 | |
18770 | static void | |
d521ce57 TT |
18771 | dwarf_decode_macro_bytes (bfd *abfd, |
18772 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 | 18773 | struct macro_source_file *current_file, |
15d034d0 | 18774 | struct line_header *lh, const char *comp_dir, |
cf2c3c16 | 18775 | struct dwarf2_section_info *section, |
36586728 | 18776 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 18777 | unsigned int offset_size, |
8fc3fc34 TT |
18778 | struct objfile *objfile, |
18779 | htab_t include_hash) | |
cf2c3c16 TT |
18780 | { |
18781 | enum dwarf_macro_record_type macinfo_type; | |
18782 | int at_commandline; | |
d521ce57 | 18783 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 18784 | |
cf2c3c16 TT |
18785 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
18786 | &offset_size, section_is_gnu); | |
18787 | if (mac_ptr == NULL) | |
18788 | { | |
18789 | /* We already issued a complaint. */ | |
18790 | return; | |
18791 | } | |
757a13d0 JK |
18792 | |
18793 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
18794 | GDB is still reading the definitions from command line. First | |
18795 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
18796 | to create CURRENT_FILE for the main source holding also the command line | |
18797 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
18798 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
18799 | ||
18800 | at_commandline = 1; | |
18801 | ||
18802 | do | |
18803 | { | |
18804 | /* Do we at least have room for a macinfo type byte? */ | |
18805 | if (mac_ptr >= mac_end) | |
18806 | { | |
f664829e | 18807 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
18808 | break; |
18809 | } | |
18810 | ||
18811 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
18812 | mac_ptr++; | |
18813 | ||
cf2c3c16 TT |
18814 | /* Note that we rely on the fact that the corresponding GNU and |
18815 | DWARF constants are the same. */ | |
757a13d0 JK |
18816 | switch (macinfo_type) |
18817 | { | |
18818 | /* A zero macinfo type indicates the end of the macro | |
18819 | information. */ | |
18820 | case 0: | |
18821 | break; | |
2e276125 | 18822 | |
cf2c3c16 TT |
18823 | case DW_MACRO_GNU_define: |
18824 | case DW_MACRO_GNU_undef: | |
18825 | case DW_MACRO_GNU_define_indirect: | |
18826 | case DW_MACRO_GNU_undef_indirect: | |
36586728 TT |
18827 | case DW_MACRO_GNU_define_indirect_alt: |
18828 | case DW_MACRO_GNU_undef_indirect_alt: | |
2e276125 | 18829 | { |
891d2f0b | 18830 | unsigned int bytes_read; |
2e276125 | 18831 | int line; |
d521ce57 | 18832 | const char *body; |
cf2c3c16 | 18833 | int is_define; |
2e276125 | 18834 | |
cf2c3c16 TT |
18835 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
18836 | mac_ptr += bytes_read; | |
18837 | ||
18838 | if (macinfo_type == DW_MACRO_GNU_define | |
18839 | || macinfo_type == DW_MACRO_GNU_undef) | |
18840 | { | |
18841 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
18842 | mac_ptr += bytes_read; | |
18843 | } | |
18844 | else | |
18845 | { | |
18846 | LONGEST str_offset; | |
18847 | ||
18848 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18849 | mac_ptr += offset_size; | |
2e276125 | 18850 | |
36586728 | 18851 | if (macinfo_type == DW_MACRO_GNU_define_indirect_alt |
f7a35f02 TT |
18852 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt |
18853 | || section_is_dwz) | |
36586728 TT |
18854 | { |
18855 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18856 | ||
18857 | body = read_indirect_string_from_dwz (dwz, str_offset); | |
18858 | } | |
18859 | else | |
18860 | body = read_indirect_string_at_offset (abfd, str_offset); | |
cf2c3c16 TT |
18861 | } |
18862 | ||
18863 | is_define = (macinfo_type == DW_MACRO_GNU_define | |
36586728 TT |
18864 | || macinfo_type == DW_MACRO_GNU_define_indirect |
18865 | || macinfo_type == DW_MACRO_GNU_define_indirect_alt); | |
2e276125 | 18866 | if (! current_file) |
757a13d0 JK |
18867 | { |
18868 | /* DWARF violation as no main source is present. */ | |
18869 | complaint (&symfile_complaints, | |
18870 | _("debug info with no main source gives macro %s " | |
18871 | "on line %d: %s"), | |
cf2c3c16 TT |
18872 | is_define ? _("definition") : _("undefinition"), |
18873 | line, body); | |
757a13d0 JK |
18874 | break; |
18875 | } | |
3e43a32a MS |
18876 | if ((line == 0 && !at_commandline) |
18877 | || (line != 0 && at_commandline)) | |
4d3c2250 | 18878 | complaint (&symfile_complaints, |
757a13d0 JK |
18879 | _("debug info gives %s macro %s with %s line %d: %s"), |
18880 | at_commandline ? _("command-line") : _("in-file"), | |
cf2c3c16 | 18881 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
18882 | line == 0 ? _("zero") : _("non-zero"), line, body); |
18883 | ||
cf2c3c16 | 18884 | if (is_define) |
757a13d0 | 18885 | parse_macro_definition (current_file, line, body); |
cf2c3c16 TT |
18886 | else |
18887 | { | |
18888 | gdb_assert (macinfo_type == DW_MACRO_GNU_undef | |
36586728 TT |
18889 | || macinfo_type == DW_MACRO_GNU_undef_indirect |
18890 | || macinfo_type == DW_MACRO_GNU_undef_indirect_alt); | |
cf2c3c16 TT |
18891 | macro_undef (current_file, line, body); |
18892 | } | |
2e276125 JB |
18893 | } |
18894 | break; | |
18895 | ||
cf2c3c16 | 18896 | case DW_MACRO_GNU_start_file: |
2e276125 | 18897 | { |
891d2f0b | 18898 | unsigned int bytes_read; |
2e276125 JB |
18899 | int line, file; |
18900 | ||
18901 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18902 | mac_ptr += bytes_read; | |
18903 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
18904 | mac_ptr += bytes_read; | |
18905 | ||
3e43a32a MS |
18906 | if ((line == 0 && !at_commandline) |
18907 | || (line != 0 && at_commandline)) | |
757a13d0 JK |
18908 | complaint (&symfile_complaints, |
18909 | _("debug info gives source %d included " | |
18910 | "from %s at %s line %d"), | |
18911 | file, at_commandline ? _("command-line") : _("file"), | |
18912 | line == 0 ? _("zero") : _("non-zero"), line); | |
18913 | ||
18914 | if (at_commandline) | |
18915 | { | |
cf2c3c16 TT |
18916 | /* This DW_MACRO_GNU_start_file was executed in the |
18917 | pass one. */ | |
757a13d0 JK |
18918 | at_commandline = 0; |
18919 | } | |
18920 | else | |
18921 | current_file = macro_start_file (file, line, | |
18922 | current_file, comp_dir, | |
cf2c3c16 | 18923 | lh, objfile); |
2e276125 JB |
18924 | } |
18925 | break; | |
18926 | ||
cf2c3c16 | 18927 | case DW_MACRO_GNU_end_file: |
2e276125 | 18928 | if (! current_file) |
4d3c2250 | 18929 | complaint (&symfile_complaints, |
3e43a32a MS |
18930 | _("macro debug info has an unmatched " |
18931 | "`close_file' directive")); | |
2e276125 JB |
18932 | else |
18933 | { | |
18934 | current_file = current_file->included_by; | |
18935 | if (! current_file) | |
18936 | { | |
cf2c3c16 | 18937 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
18938 | |
18939 | /* GCC circa March 2002 doesn't produce the zero | |
18940 | type byte marking the end of the compilation | |
18941 | unit. Complain if it's not there, but exit no | |
18942 | matter what. */ | |
18943 | ||
18944 | /* Do we at least have room for a macinfo type byte? */ | |
18945 | if (mac_ptr >= mac_end) | |
18946 | { | |
f664829e | 18947 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
18948 | return; |
18949 | } | |
18950 | ||
18951 | /* We don't increment mac_ptr here, so this is just | |
18952 | a look-ahead. */ | |
18953 | next_type = read_1_byte (abfd, mac_ptr); | |
18954 | if (next_type != 0) | |
4d3c2250 | 18955 | complaint (&symfile_complaints, |
3e43a32a MS |
18956 | _("no terminating 0-type entry for " |
18957 | "macros in `.debug_macinfo' section")); | |
2e276125 JB |
18958 | |
18959 | return; | |
18960 | } | |
18961 | } | |
18962 | break; | |
18963 | ||
cf2c3c16 | 18964 | case DW_MACRO_GNU_transparent_include: |
36586728 | 18965 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
18966 | { |
18967 | LONGEST offset; | |
8fc3fc34 | 18968 | void **slot; |
a036ba48 TT |
18969 | bfd *include_bfd = abfd; |
18970 | struct dwarf2_section_info *include_section = section; | |
18971 | struct dwarf2_section_info alt_section; | |
d521ce57 | 18972 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 18973 | int is_dwz = section_is_dwz; |
d521ce57 | 18974 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
18975 | |
18976 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
18977 | mac_ptr += offset_size; | |
18978 | ||
a036ba48 TT |
18979 | if (macinfo_type == DW_MACRO_GNU_transparent_include_alt) |
18980 | { | |
18981 | struct dwz_file *dwz = dwarf2_get_dwz_file (); | |
18982 | ||
18983 | dwarf2_read_section (dwarf2_per_objfile->objfile, | |
18984 | &dwz->macro); | |
18985 | ||
18986 | include_bfd = dwz->macro.asection->owner; | |
18987 | include_section = &dwz->macro; | |
18988 | include_mac_end = dwz->macro.buffer + dwz->macro.size; | |
18989 | is_dwz = 1; | |
18990 | } | |
18991 | ||
18992 | new_mac_ptr = include_section->buffer + offset; | |
18993 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
18994 | ||
8fc3fc34 TT |
18995 | if (*slot != NULL) |
18996 | { | |
18997 | /* This has actually happened; see | |
18998 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
18999 | complaint (&symfile_complaints, | |
19000 | _("recursive DW_MACRO_GNU_transparent_include in " | |
19001 | ".debug_macro section")); | |
19002 | } | |
19003 | else | |
19004 | { | |
d521ce57 | 19005 | *slot = (void *) new_mac_ptr; |
36586728 | 19006 | |
a036ba48 | 19007 | dwarf_decode_macro_bytes (include_bfd, new_mac_ptr, |
36586728 | 19008 | include_mac_end, current_file, |
8fc3fc34 | 19009 | lh, comp_dir, |
36586728 | 19010 | section, section_is_gnu, is_dwz, |
8fc3fc34 TT |
19011 | offset_size, objfile, include_hash); |
19012 | ||
d521ce57 | 19013 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 19014 | } |
cf2c3c16 TT |
19015 | } |
19016 | break; | |
19017 | ||
2e276125 | 19018 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
19019 | if (!section_is_gnu) |
19020 | { | |
19021 | unsigned int bytes_read; | |
19022 | int constant; | |
2e276125 | 19023 | |
cf2c3c16 TT |
19024 | constant = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
19025 | mac_ptr += bytes_read; | |
19026 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19027 | mac_ptr += bytes_read; | |
2e276125 | 19028 | |
cf2c3c16 TT |
19029 | /* We don't recognize any vendor extensions. */ |
19030 | break; | |
19031 | } | |
19032 | /* FALLTHROUGH */ | |
19033 | ||
19034 | default: | |
19035 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 19036 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
19037 | section); |
19038 | if (mac_ptr == NULL) | |
19039 | return; | |
19040 | break; | |
2e276125 | 19041 | } |
757a13d0 | 19042 | } while (macinfo_type != 0); |
2e276125 | 19043 | } |
8e19ed76 | 19044 | |
cf2c3c16 | 19045 | static void |
09262596 | 19046 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
15d034d0 | 19047 | const char *comp_dir, int section_is_gnu) |
cf2c3c16 | 19048 | { |
bb5ed363 | 19049 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
19050 | struct line_header *lh = cu->line_header; |
19051 | bfd *abfd; | |
d521ce57 | 19052 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
19053 | struct macro_source_file *current_file = 0; |
19054 | enum dwarf_macro_record_type macinfo_type; | |
19055 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 19056 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 TT |
19057 | struct cleanup *cleanup; |
19058 | htab_t include_hash; | |
19059 | void **slot; | |
09262596 DE |
19060 | struct dwarf2_section_info *section; |
19061 | const char *section_name; | |
19062 | ||
19063 | if (cu->dwo_unit != NULL) | |
19064 | { | |
19065 | if (section_is_gnu) | |
19066 | { | |
19067 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
19068 | section_name = ".debug_macro.dwo"; | |
19069 | } | |
19070 | else | |
19071 | { | |
19072 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
19073 | section_name = ".debug_macinfo.dwo"; | |
19074 | } | |
19075 | } | |
19076 | else | |
19077 | { | |
19078 | if (section_is_gnu) | |
19079 | { | |
19080 | section = &dwarf2_per_objfile->macro; | |
19081 | section_name = ".debug_macro"; | |
19082 | } | |
19083 | else | |
19084 | { | |
19085 | section = &dwarf2_per_objfile->macinfo; | |
19086 | section_name = ".debug_macinfo"; | |
19087 | } | |
19088 | } | |
cf2c3c16 | 19089 | |
bb5ed363 | 19090 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
19091 | if (section->buffer == NULL) |
19092 | { | |
fceca515 | 19093 | complaint (&symfile_complaints, _("missing %s section"), section_name); |
cf2c3c16 TT |
19094 | return; |
19095 | } | |
09262596 | 19096 | abfd = section->asection->owner; |
cf2c3c16 TT |
19097 | |
19098 | /* First pass: Find the name of the base filename. | |
19099 | This filename is needed in order to process all macros whose definition | |
19100 | (or undefinition) comes from the command line. These macros are defined | |
19101 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
19102 | associated to the base file. | |
19103 | ||
19104 | To determine the base file name, we scan the macro definitions until we | |
19105 | reach the first DW_MACINFO_start_file entry. We then initialize | |
19106 | CURRENT_FILE accordingly so that any macro definition found before the | |
19107 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
19108 | ||
19109 | mac_ptr = section->buffer + offset; | |
19110 | mac_end = section->buffer + section->size; | |
19111 | ||
19112 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
19113 | &offset_size, section_is_gnu); | |
19114 | if (mac_ptr == NULL) | |
19115 | { | |
19116 | /* We already issued a complaint. */ | |
19117 | return; | |
19118 | } | |
19119 | ||
19120 | do | |
19121 | { | |
19122 | /* Do we at least have room for a macinfo type byte? */ | |
19123 | if (mac_ptr >= mac_end) | |
19124 | { | |
19125 | /* Complaint is printed during the second pass as GDB will probably | |
19126 | stop the first pass earlier upon finding | |
19127 | DW_MACINFO_start_file. */ | |
19128 | break; | |
19129 | } | |
19130 | ||
19131 | macinfo_type = read_1_byte (abfd, mac_ptr); | |
19132 | mac_ptr++; | |
19133 | ||
19134 | /* Note that we rely on the fact that the corresponding GNU and | |
19135 | DWARF constants are the same. */ | |
19136 | switch (macinfo_type) | |
19137 | { | |
19138 | /* A zero macinfo type indicates the end of the macro | |
19139 | information. */ | |
19140 | case 0: | |
19141 | break; | |
19142 | ||
19143 | case DW_MACRO_GNU_define: | |
19144 | case DW_MACRO_GNU_undef: | |
19145 | /* Only skip the data by MAC_PTR. */ | |
19146 | { | |
19147 | unsigned int bytes_read; | |
19148 | ||
19149 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19150 | mac_ptr += bytes_read; | |
19151 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19152 | mac_ptr += bytes_read; | |
19153 | } | |
19154 | break; | |
19155 | ||
19156 | case DW_MACRO_GNU_start_file: | |
19157 | { | |
19158 | unsigned int bytes_read; | |
19159 | int line, file; | |
19160 | ||
19161 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19162 | mac_ptr += bytes_read; | |
19163 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19164 | mac_ptr += bytes_read; | |
19165 | ||
19166 | current_file = macro_start_file (file, line, current_file, | |
bb5ed363 | 19167 | comp_dir, lh, objfile); |
cf2c3c16 TT |
19168 | } |
19169 | break; | |
19170 | ||
19171 | case DW_MACRO_GNU_end_file: | |
19172 | /* No data to skip by MAC_PTR. */ | |
19173 | break; | |
19174 | ||
19175 | case DW_MACRO_GNU_define_indirect: | |
19176 | case DW_MACRO_GNU_undef_indirect: | |
f7a35f02 TT |
19177 | case DW_MACRO_GNU_define_indirect_alt: |
19178 | case DW_MACRO_GNU_undef_indirect_alt: | |
cf2c3c16 TT |
19179 | { |
19180 | unsigned int bytes_read; | |
19181 | ||
19182 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19183 | mac_ptr += bytes_read; | |
19184 | mac_ptr += offset_size; | |
19185 | } | |
19186 | break; | |
19187 | ||
19188 | case DW_MACRO_GNU_transparent_include: | |
f7a35f02 | 19189 | case DW_MACRO_GNU_transparent_include_alt: |
cf2c3c16 TT |
19190 | /* Note that, according to the spec, a transparent include |
19191 | chain cannot call DW_MACRO_GNU_start_file. So, we can just | |
19192 | skip this opcode. */ | |
19193 | mac_ptr += offset_size; | |
19194 | break; | |
19195 | ||
19196 | case DW_MACINFO_vendor_ext: | |
19197 | /* Only skip the data by MAC_PTR. */ | |
19198 | if (!section_is_gnu) | |
19199 | { | |
19200 | unsigned int bytes_read; | |
19201 | ||
19202 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
19203 | mac_ptr += bytes_read; | |
19204 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
19205 | mac_ptr += bytes_read; | |
19206 | } | |
19207 | /* FALLTHROUGH */ | |
19208 | ||
19209 | default: | |
19210 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 19211 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
19212 | section); |
19213 | if (mac_ptr == NULL) | |
19214 | return; | |
19215 | break; | |
19216 | } | |
19217 | } while (macinfo_type != 0 && current_file == NULL); | |
19218 | ||
19219 | /* Second pass: Process all entries. | |
19220 | ||
19221 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
19222 | command-line macro definitions/undefinitions. This flag is unset when we | |
19223 | reach the first DW_MACINFO_start_file entry. */ | |
19224 | ||
8fc3fc34 TT |
19225 | include_hash = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
19226 | NULL, xcalloc, xfree); | |
19227 | cleanup = make_cleanup_htab_delete (include_hash); | |
19228 | mac_ptr = section->buffer + offset; | |
19229 | slot = htab_find_slot (include_hash, mac_ptr, INSERT); | |
d521ce57 | 19230 | *slot = (void *) mac_ptr; |
8fc3fc34 | 19231 | dwarf_decode_macro_bytes (abfd, mac_ptr, mac_end, |
36586728 TT |
19232 | current_file, lh, comp_dir, section, |
19233 | section_is_gnu, 0, | |
8fc3fc34 TT |
19234 | offset_size, objfile, include_hash); |
19235 | do_cleanups (cleanup); | |
cf2c3c16 TT |
19236 | } |
19237 | ||
8e19ed76 | 19238 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 19239 | if so return true else false. */ |
380bca97 | 19240 | |
8e19ed76 PS |
19241 | static int |
19242 | attr_form_is_block (struct attribute *attr) | |
19243 | { | |
19244 | return (attr == NULL ? 0 : | |
19245 | attr->form == DW_FORM_block1 | |
19246 | || attr->form == DW_FORM_block2 | |
19247 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
19248 | || attr->form == DW_FORM_block |
19249 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 19250 | } |
4c2df51b | 19251 | |
c6a0999f JB |
19252 | /* Return non-zero if ATTR's value is a section offset --- classes |
19253 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
19254 | You may use DW_UNSND (attr) to retrieve such offsets. | |
19255 | ||
19256 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
19257 | may have a value that belongs to more than one of these classes; it | |
19258 | would be ambiguous if we did, because we use the same forms for all | |
19259 | of them. */ | |
380bca97 | 19260 | |
3690dd37 JB |
19261 | static int |
19262 | attr_form_is_section_offset (struct attribute *attr) | |
19263 | { | |
19264 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
19265 | || attr->form == DW_FORM_data8 |
19266 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
19267 | } |
19268 | ||
3690dd37 JB |
19269 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
19270 | zero otherwise. When this function returns true, you can apply | |
19271 | dwarf2_get_attr_constant_value to it. | |
19272 | ||
19273 | However, note that for some attributes you must check | |
19274 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
19275 | and DW_FORM_data8 are members of both the constant class, and of | |
19276 | the classes that contain offsets into other debug sections | |
19277 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
19278 | that, if an attribute's can be either a constant or one of the | |
19279 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
19280 | taken as section offsets, not constants. */ | |
380bca97 | 19281 | |
3690dd37 JB |
19282 | static int |
19283 | attr_form_is_constant (struct attribute *attr) | |
19284 | { | |
19285 | switch (attr->form) | |
19286 | { | |
19287 | case DW_FORM_sdata: | |
19288 | case DW_FORM_udata: | |
19289 | case DW_FORM_data1: | |
19290 | case DW_FORM_data2: | |
19291 | case DW_FORM_data4: | |
19292 | case DW_FORM_data8: | |
19293 | return 1; | |
19294 | default: | |
19295 | return 0; | |
19296 | } | |
19297 | } | |
19298 | ||
3019eac3 DE |
19299 | /* Return the .debug_loc section to use for CU. |
19300 | For DWO files use .debug_loc.dwo. */ | |
19301 | ||
19302 | static struct dwarf2_section_info * | |
19303 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
19304 | { | |
19305 | if (cu->dwo_unit) | |
19306 | return &cu->dwo_unit->dwo_file->sections.loc; | |
19307 | return &dwarf2_per_objfile->loc; | |
19308 | } | |
19309 | ||
8cf6f0b1 TT |
19310 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
19311 | ||
19312 | static void | |
19313 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
19314 | struct dwarf2_loclist_baton *baton, | |
19315 | struct attribute *attr) | |
19316 | { | |
3019eac3 DE |
19317 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
19318 | ||
19319 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
19320 | |
19321 | baton->per_cu = cu->per_cu; | |
19322 | gdb_assert (baton->per_cu); | |
19323 | /* We don't know how long the location list is, but make sure we | |
19324 | don't run off the edge of the section. */ | |
3019eac3 DE |
19325 | baton->size = section->size - DW_UNSND (attr); |
19326 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 19327 | baton->base_address = cu->base_address; |
f664829e | 19328 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
19329 | } |
19330 | ||
4c2df51b DJ |
19331 | static void |
19332 | dwarf2_symbol_mark_computed (struct attribute *attr, struct symbol *sym, | |
f1e6e072 | 19333 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 19334 | { |
bb5ed363 | 19335 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 19336 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 19337 | |
3690dd37 | 19338 | if (attr_form_is_section_offset (attr) |
3019eac3 | 19339 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
19340 | the section. If so, fall through to the complaint in the |
19341 | other branch. */ | |
3019eac3 | 19342 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 19343 | { |
0d53c4c4 | 19344 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 19345 | |
bb5ed363 | 19346 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 19347 | sizeof (struct dwarf2_loclist_baton)); |
4c2df51b | 19348 | |
8cf6f0b1 | 19349 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 19350 | |
d00adf39 | 19351 | if (cu->base_known == 0) |
0d53c4c4 | 19352 | complaint (&symfile_complaints, |
3e43a32a MS |
19353 | _("Location list used without " |
19354 | "specifying the CU base address.")); | |
4c2df51b | 19355 | |
f1e6e072 TT |
19356 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
19357 | ? dwarf2_loclist_block_index | |
19358 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
19359 | SYMBOL_LOCATION_BATON (sym) = baton; |
19360 | } | |
19361 | else | |
19362 | { | |
19363 | struct dwarf2_locexpr_baton *baton; | |
19364 | ||
bb5ed363 | 19365 | baton = obstack_alloc (&objfile->objfile_obstack, |
0d53c4c4 | 19366 | sizeof (struct dwarf2_locexpr_baton)); |
ae0d2f24 UW |
19367 | baton->per_cu = cu->per_cu; |
19368 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
19369 | |
19370 | if (attr_form_is_block (attr)) | |
19371 | { | |
19372 | /* Note that we're just copying the block's data pointer | |
19373 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
19374 | info_buffer for SYM's objfile; right now we never release |
19375 | that buffer, but when we do clean up properly this may | |
19376 | need to change. */ | |
0d53c4c4 DJ |
19377 | baton->size = DW_BLOCK (attr)->size; |
19378 | baton->data = DW_BLOCK (attr)->data; | |
19379 | } | |
19380 | else | |
19381 | { | |
19382 | dwarf2_invalid_attrib_class_complaint ("location description", | |
19383 | SYMBOL_NATURAL_NAME (sym)); | |
19384 | baton->size = 0; | |
0d53c4c4 | 19385 | } |
6e70227d | 19386 | |
f1e6e072 TT |
19387 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
19388 | ? dwarf2_locexpr_block_index | |
19389 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
19390 | SYMBOL_LOCATION_BATON (sym) = baton; |
19391 | } | |
4c2df51b | 19392 | } |
6502dd73 | 19393 | |
9aa1f1e3 TT |
19394 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
19395 | came from a separate debuginfo file, then the master objfile is | |
19396 | returned. */ | |
ae0d2f24 UW |
19397 | |
19398 | struct objfile * | |
19399 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
19400 | { | |
9291a0cd | 19401 | struct objfile *objfile = per_cu->objfile; |
ae0d2f24 UW |
19402 | |
19403 | /* Return the master objfile, so that we can report and look up the | |
19404 | correct file containing this variable. */ | |
19405 | if (objfile->separate_debug_objfile_backlink) | |
19406 | objfile = objfile->separate_debug_objfile_backlink; | |
19407 | ||
19408 | return objfile; | |
19409 | } | |
19410 | ||
96408a79 SA |
19411 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
19412 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
19413 | CU_HEADERP first. */ | |
19414 | ||
19415 | static const struct comp_unit_head * | |
19416 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
19417 | struct dwarf2_per_cu_data *per_cu) | |
19418 | { | |
d521ce57 | 19419 | const gdb_byte *info_ptr; |
96408a79 SA |
19420 | |
19421 | if (per_cu->cu) | |
19422 | return &per_cu->cu->header; | |
19423 | ||
8a0459fd | 19424 | info_ptr = per_cu->section->buffer + per_cu->offset.sect_off; |
96408a79 SA |
19425 | |
19426 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
0bc3a05c | 19427 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->objfile->obfd); |
96408a79 SA |
19428 | |
19429 | return cu_headerp; | |
19430 | } | |
19431 | ||
ae0d2f24 UW |
19432 | /* Return the address size given in the compilation unit header for CU. */ |
19433 | ||
98714339 | 19434 | int |
ae0d2f24 UW |
19435 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
19436 | { | |
96408a79 SA |
19437 | struct comp_unit_head cu_header_local; |
19438 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 19439 | |
96408a79 SA |
19440 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
19441 | ||
19442 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
19443 | } |
19444 | ||
9eae7c52 TT |
19445 | /* Return the offset size given in the compilation unit header for CU. */ |
19446 | ||
19447 | int | |
19448 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
19449 | { | |
96408a79 SA |
19450 | struct comp_unit_head cu_header_local; |
19451 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 19452 | |
96408a79 SA |
19453 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
19454 | ||
19455 | return cu_headerp->offset_size; | |
19456 | } | |
19457 | ||
19458 | /* See its dwarf2loc.h declaration. */ | |
19459 | ||
19460 | int | |
19461 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
19462 | { | |
19463 | struct comp_unit_head cu_header_local; | |
19464 | const struct comp_unit_head *cu_headerp; | |
19465 | ||
19466 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
19467 | ||
19468 | if (cu_headerp->version == 2) | |
19469 | return cu_headerp->addr_size; | |
19470 | else | |
19471 | return cu_headerp->offset_size; | |
181cebd4 JK |
19472 | } |
19473 | ||
9aa1f1e3 TT |
19474 | /* Return the text offset of the CU. The returned offset comes from |
19475 | this CU's objfile. If this objfile came from a separate debuginfo | |
19476 | file, then the offset may be different from the corresponding | |
19477 | offset in the parent objfile. */ | |
19478 | ||
19479 | CORE_ADDR | |
19480 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
19481 | { | |
bb3fa9d0 | 19482 | struct objfile *objfile = per_cu->objfile; |
9aa1f1e3 TT |
19483 | |
19484 | return ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
19485 | } | |
19486 | ||
348e048f DE |
19487 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
19488 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
19489 | |
19490 | static struct dwarf2_per_cu_data * | |
b64f50a1 | 19491 | dwarf2_find_containing_comp_unit (sect_offset offset, |
36586728 | 19492 | unsigned int offset_in_dwz, |
ae038cb0 DJ |
19493 | struct objfile *objfile) |
19494 | { | |
19495 | struct dwarf2_per_cu_data *this_cu; | |
19496 | int low, high; | |
36586728 | 19497 | const sect_offset *cu_off; |
ae038cb0 | 19498 | |
ae038cb0 DJ |
19499 | low = 0; |
19500 | high = dwarf2_per_objfile->n_comp_units - 1; | |
19501 | while (high > low) | |
19502 | { | |
36586728 | 19503 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 19504 | int mid = low + (high - low) / 2; |
9a619af0 | 19505 | |
36586728 TT |
19506 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
19507 | cu_off = &mid_cu->offset; | |
19508 | if (mid_cu->is_dwz > offset_in_dwz | |
19509 | || (mid_cu->is_dwz == offset_in_dwz | |
19510 | && cu_off->sect_off >= offset.sect_off)) | |
ae038cb0 DJ |
19511 | high = mid; |
19512 | else | |
19513 | low = mid + 1; | |
19514 | } | |
19515 | gdb_assert (low == high); | |
36586728 TT |
19516 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
19517 | cu_off = &this_cu->offset; | |
19518 | if (this_cu->is_dwz != offset_in_dwz || cu_off->sect_off > offset.sect_off) | |
ae038cb0 | 19519 | { |
36586728 | 19520 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 AC |
19521 | error (_("Dwarf Error: could not find partial DIE containing " |
19522 | "offset 0x%lx [in module %s]"), | |
b64f50a1 | 19523 | (long) offset.sect_off, bfd_get_filename (objfile->obfd)); |
10b3939b | 19524 | |
b64f50a1 JK |
19525 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->offset.sect_off |
19526 | <= offset.sect_off); | |
ae038cb0 DJ |
19527 | return dwarf2_per_objfile->all_comp_units[low-1]; |
19528 | } | |
19529 | else | |
19530 | { | |
19531 | this_cu = dwarf2_per_objfile->all_comp_units[low]; | |
19532 | if (low == dwarf2_per_objfile->n_comp_units - 1 | |
b64f50a1 JK |
19533 | && offset.sect_off >= this_cu->offset.sect_off + this_cu->length) |
19534 | error (_("invalid dwarf2 offset %u"), offset.sect_off); | |
19535 | gdb_assert (offset.sect_off < this_cu->offset.sect_off + this_cu->length); | |
ae038cb0 DJ |
19536 | return this_cu; |
19537 | } | |
19538 | } | |
19539 | ||
23745b47 | 19540 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 19541 | |
9816fde3 | 19542 | static void |
23745b47 | 19543 | init_one_comp_unit (struct dwarf2_cu *cu, struct dwarf2_per_cu_data *per_cu) |
93311388 | 19544 | { |
9816fde3 | 19545 | memset (cu, 0, sizeof (*cu)); |
23745b47 DE |
19546 | per_cu->cu = cu; |
19547 | cu->per_cu = per_cu; | |
19548 | cu->objfile = per_cu->objfile; | |
93311388 | 19549 | obstack_init (&cu->comp_unit_obstack); |
9816fde3 JK |
19550 | } |
19551 | ||
19552 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
19553 | ||
19554 | static void | |
95554aad TT |
19555 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
19556 | enum language pretend_language) | |
9816fde3 JK |
19557 | { |
19558 | struct attribute *attr; | |
19559 | ||
19560 | /* Set the language we're debugging. */ | |
19561 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
19562 | if (attr) | |
19563 | set_cu_language (DW_UNSND (attr), cu); | |
19564 | else | |
9cded63f | 19565 | { |
95554aad | 19566 | cu->language = pretend_language; |
9cded63f TT |
19567 | cu->language_defn = language_def (cu->language); |
19568 | } | |
dee91e82 DE |
19569 | |
19570 | attr = dwarf2_attr (comp_unit_die, DW_AT_producer, cu); | |
19571 | if (attr) | |
19572 | cu->producer = DW_STRING (attr); | |
93311388 DE |
19573 | } |
19574 | ||
ae038cb0 DJ |
19575 | /* Release one cached compilation unit, CU. We unlink it from the tree |
19576 | of compilation units, but we don't remove it from the read_in_chain; | |
93311388 DE |
19577 | the caller is responsible for that. |
19578 | NOTE: DATA is a void * because this function is also used as a | |
19579 | cleanup routine. */ | |
ae038cb0 DJ |
19580 | |
19581 | static void | |
68dc6402 | 19582 | free_heap_comp_unit (void *data) |
ae038cb0 DJ |
19583 | { |
19584 | struct dwarf2_cu *cu = data; | |
19585 | ||
23745b47 DE |
19586 | gdb_assert (cu->per_cu != NULL); |
19587 | cu->per_cu->cu = NULL; | |
ae038cb0 DJ |
19588 | cu->per_cu = NULL; |
19589 | ||
19590 | obstack_free (&cu->comp_unit_obstack, NULL); | |
19591 | ||
19592 | xfree (cu); | |
19593 | } | |
19594 | ||
72bf9492 | 19595 | /* This cleanup function is passed the address of a dwarf2_cu on the stack |
ae038cb0 | 19596 | when we're finished with it. We can't free the pointer itself, but be |
dee91e82 | 19597 | sure to unlink it from the cache. Also release any associated storage. */ |
72bf9492 DJ |
19598 | |
19599 | static void | |
19600 | free_stack_comp_unit (void *data) | |
19601 | { | |
19602 | struct dwarf2_cu *cu = data; | |
19603 | ||
23745b47 DE |
19604 | gdb_assert (cu->per_cu != NULL); |
19605 | cu->per_cu->cu = NULL; | |
19606 | cu->per_cu = NULL; | |
19607 | ||
72bf9492 DJ |
19608 | obstack_free (&cu->comp_unit_obstack, NULL); |
19609 | cu->partial_dies = NULL; | |
ae038cb0 DJ |
19610 | } |
19611 | ||
19612 | /* Free all cached compilation units. */ | |
19613 | ||
19614 | static void | |
19615 | free_cached_comp_units (void *data) | |
19616 | { | |
19617 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19618 | ||
19619 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19620 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19621 | while (per_cu != NULL) | |
19622 | { | |
19623 | struct dwarf2_per_cu_data *next_cu; | |
19624 | ||
19625 | next_cu = per_cu->cu->read_in_chain; | |
19626 | ||
68dc6402 | 19627 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19628 | *last_chain = next_cu; |
19629 | ||
19630 | per_cu = next_cu; | |
19631 | } | |
19632 | } | |
19633 | ||
19634 | /* Increase the age counter on each cached compilation unit, and free | |
19635 | any that are too old. */ | |
19636 | ||
19637 | static void | |
19638 | age_cached_comp_units (void) | |
19639 | { | |
19640 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19641 | ||
19642 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
19643 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19644 | while (per_cu != NULL) | |
19645 | { | |
19646 | per_cu->cu->last_used ++; | |
19647 | if (per_cu->cu->last_used <= dwarf2_max_cache_age) | |
19648 | dwarf2_mark (per_cu->cu); | |
19649 | per_cu = per_cu->cu->read_in_chain; | |
19650 | } | |
19651 | ||
19652 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19653 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19654 | while (per_cu != NULL) | |
19655 | { | |
19656 | struct dwarf2_per_cu_data *next_cu; | |
19657 | ||
19658 | next_cu = per_cu->cu->read_in_chain; | |
19659 | ||
19660 | if (!per_cu->cu->mark) | |
19661 | { | |
68dc6402 | 19662 | free_heap_comp_unit (per_cu->cu); |
ae038cb0 DJ |
19663 | *last_chain = next_cu; |
19664 | } | |
19665 | else | |
19666 | last_chain = &per_cu->cu->read_in_chain; | |
19667 | ||
19668 | per_cu = next_cu; | |
19669 | } | |
19670 | } | |
19671 | ||
19672 | /* Remove a single compilation unit from the cache. */ | |
19673 | ||
19674 | static void | |
dee91e82 | 19675 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
19676 | { |
19677 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
19678 | ||
19679 | per_cu = dwarf2_per_objfile->read_in_chain; | |
19680 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
19681 | while (per_cu != NULL) | |
19682 | { | |
19683 | struct dwarf2_per_cu_data *next_cu; | |
19684 | ||
19685 | next_cu = per_cu->cu->read_in_chain; | |
19686 | ||
dee91e82 | 19687 | if (per_cu == target_per_cu) |
ae038cb0 | 19688 | { |
68dc6402 | 19689 | free_heap_comp_unit (per_cu->cu); |
dee91e82 | 19690 | per_cu->cu = NULL; |
ae038cb0 DJ |
19691 | *last_chain = next_cu; |
19692 | break; | |
19693 | } | |
19694 | else | |
19695 | last_chain = &per_cu->cu->read_in_chain; | |
19696 | ||
19697 | per_cu = next_cu; | |
19698 | } | |
19699 | } | |
19700 | ||
fe3e1990 DJ |
19701 | /* Release all extra memory associated with OBJFILE. */ |
19702 | ||
19703 | void | |
19704 | dwarf2_free_objfile (struct objfile *objfile) | |
19705 | { | |
19706 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
19707 | ||
19708 | if (dwarf2_per_objfile == NULL) | |
19709 | return; | |
19710 | ||
19711 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
19712 | free_cached_comp_units (NULL); | |
19713 | ||
7b9f3c50 DE |
19714 | if (dwarf2_per_objfile->quick_file_names_table) |
19715 | htab_delete (dwarf2_per_objfile->quick_file_names_table); | |
9291a0cd | 19716 | |
fe3e1990 DJ |
19717 | /* Everything else should be on the objfile obstack. */ |
19718 | } | |
19719 | ||
dee91e82 DE |
19720 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
19721 | We store these in a hash table separate from the DIEs, and preserve them | |
19722 | when the DIEs are flushed out of cache. | |
19723 | ||
19724 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 19725 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
19726 | or the type may come from a DWO file. Furthermore, while it's more logical |
19727 | to use per_cu->section+offset, with Fission the section with the data is in | |
19728 | the DWO file but we don't know that section at the point we need it. | |
19729 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
19730 | because we can enter the lookup routine, get_die_type_at_offset, from | |
19731 | outside this file, and thus won't necessarily have PER_CU->cu. | |
19732 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 19733 | |
dee91e82 | 19734 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 19735 | { |
dee91e82 | 19736 | const struct dwarf2_per_cu_data *per_cu; |
b64f50a1 | 19737 | sect_offset offset; |
1c379e20 DJ |
19738 | struct type *type; |
19739 | }; | |
19740 | ||
dee91e82 | 19741 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19742 | |
19743 | static hashval_t | |
dee91e82 | 19744 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 19745 | { |
dee91e82 | 19746 | const struct dwarf2_per_cu_offset_and_type *ofs = item; |
9a619af0 | 19747 | |
dee91e82 | 19748 | return (uintptr_t) ofs->per_cu + ofs->offset.sect_off; |
1c379e20 DJ |
19749 | } |
19750 | ||
dee91e82 | 19751 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
19752 | |
19753 | static int | |
dee91e82 | 19754 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 19755 | { |
dee91e82 DE |
19756 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs = item_lhs; |
19757 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs = item_rhs; | |
9a619af0 | 19758 | |
dee91e82 DE |
19759 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
19760 | && ofs_lhs->offset.sect_off == ofs_rhs->offset.sect_off); | |
1c379e20 DJ |
19761 | } |
19762 | ||
19763 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
19764 | table if necessary. For convenience, return TYPE. |
19765 | ||
19766 | The DIEs reading must have careful ordering to: | |
19767 | * Not cause infite loops trying to read in DIEs as a prerequisite for | |
19768 | reading current DIE. | |
19769 | * Not trying to dereference contents of still incompletely read in types | |
19770 | while reading in other DIEs. | |
19771 | * Enable referencing still incompletely read in types just by a pointer to | |
19772 | the type without accessing its fields. | |
19773 | ||
19774 | Therefore caller should follow these rules: | |
19775 | * Try to fetch any prerequisite types we may need to build this DIE type | |
19776 | before building the type and calling set_die_type. | |
e71ec853 | 19777 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
19778 | possible before fetching more types to complete the current type. |
19779 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 19780 | |
f792889a | 19781 | static struct type * |
1c379e20 DJ |
19782 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
19783 | { | |
dee91e82 | 19784 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
673bfd45 | 19785 | struct objfile *objfile = cu->objfile; |
1c379e20 | 19786 | |
b4ba55a1 JB |
19787 | /* For Ada types, make sure that the gnat-specific data is always |
19788 | initialized (if not already set). There are a few types where | |
19789 | we should not be doing so, because the type-specific area is | |
19790 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
19791 | where the type-specific area is used to store the floatformat). | |
19792 | But this is not a problem, because the gnat-specific information | |
19793 | is actually not needed for these types. */ | |
19794 | if (need_gnat_info (cu) | |
19795 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
19796 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
19797 | && !HAVE_GNAT_AUX_INFO (type)) | |
19798 | INIT_GNAT_SPECIFIC (type); | |
19799 | ||
dee91e82 | 19800 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19801 | { |
dee91e82 DE |
19802 | dwarf2_per_objfile->die_type_hash = |
19803 | htab_create_alloc_ex (127, | |
19804 | per_cu_offset_and_type_hash, | |
19805 | per_cu_offset_and_type_eq, | |
19806 | NULL, | |
19807 | &objfile->objfile_obstack, | |
19808 | hashtab_obstack_allocate, | |
19809 | dummy_obstack_deallocate); | |
f792889a | 19810 | } |
1c379e20 | 19811 | |
dee91e82 | 19812 | ofs.per_cu = cu->per_cu; |
1c379e20 DJ |
19813 | ofs.offset = die->offset; |
19814 | ofs.type = type; | |
dee91e82 DE |
19815 | slot = (struct dwarf2_per_cu_offset_and_type **) |
19816 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 JK |
19817 | if (*slot) |
19818 | complaint (&symfile_complaints, | |
19819 | _("A problem internal to GDB: DIE 0x%x has type already set"), | |
b64f50a1 | 19820 | die->offset.sect_off); |
673bfd45 | 19821 | *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot)); |
1c379e20 | 19822 | **slot = ofs; |
f792889a | 19823 | return type; |
1c379e20 DJ |
19824 | } |
19825 | ||
02142a6c DE |
19826 | /* Look up the type for the die at OFFSET in PER_CU in die_type_hash, |
19827 | or return NULL if the die does not have a saved type. */ | |
1c379e20 DJ |
19828 | |
19829 | static struct type * | |
b64f50a1 | 19830 | get_die_type_at_offset (sect_offset offset, |
673bfd45 | 19831 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 19832 | { |
dee91e82 | 19833 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 19834 | |
dee91e82 | 19835 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 19836 | return NULL; |
1c379e20 | 19837 | |
dee91e82 | 19838 | ofs.per_cu = per_cu; |
673bfd45 | 19839 | ofs.offset = offset; |
dee91e82 | 19840 | slot = htab_find (dwarf2_per_objfile->die_type_hash, &ofs); |
1c379e20 DJ |
19841 | if (slot) |
19842 | return slot->type; | |
19843 | else | |
19844 | return NULL; | |
19845 | } | |
19846 | ||
02142a6c | 19847 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
19848 | or return NULL if DIE does not have a saved type. */ |
19849 | ||
19850 | static struct type * | |
19851 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
19852 | { | |
19853 | return get_die_type_at_offset (die->offset, cu->per_cu); | |
19854 | } | |
19855 | ||
10b3939b DJ |
19856 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
19857 | ||
19858 | static void | |
19859 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
19860 | struct dwarf2_per_cu_data *ref_per_cu) | |
19861 | { | |
19862 | void **slot; | |
19863 | ||
19864 | if (cu->dependencies == NULL) | |
19865 | cu->dependencies | |
19866 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
19867 | NULL, &cu->comp_unit_obstack, | |
19868 | hashtab_obstack_allocate, | |
19869 | dummy_obstack_deallocate); | |
19870 | ||
19871 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
19872 | if (*slot == NULL) | |
19873 | *slot = ref_per_cu; | |
19874 | } | |
1c379e20 | 19875 | |
f504f079 DE |
19876 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
19877 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
19878 | cache that we must keep because we are keeping CU. */ |
19879 | ||
10b3939b DJ |
19880 | static int |
19881 | dwarf2_mark_helper (void **slot, void *data) | |
19882 | { | |
19883 | struct dwarf2_per_cu_data *per_cu; | |
19884 | ||
19885 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
19886 | |
19887 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
19888 | reading of the chain. As such dependencies remain valid it is not much | |
19889 | useful to track and undo them during QUIT cleanups. */ | |
19890 | if (per_cu->cu == NULL) | |
19891 | return 1; | |
19892 | ||
10b3939b DJ |
19893 | if (per_cu->cu->mark) |
19894 | return 1; | |
19895 | per_cu->cu->mark = 1; | |
19896 | ||
19897 | if (per_cu->cu->dependencies != NULL) | |
19898 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
19899 | ||
19900 | return 1; | |
19901 | } | |
19902 | ||
f504f079 DE |
19903 | /* Set the mark field in CU and in every other compilation unit in the |
19904 | cache that we must keep because we are keeping CU. */ | |
19905 | ||
ae038cb0 DJ |
19906 | static void |
19907 | dwarf2_mark (struct dwarf2_cu *cu) | |
19908 | { | |
19909 | if (cu->mark) | |
19910 | return; | |
19911 | cu->mark = 1; | |
10b3939b DJ |
19912 | if (cu->dependencies != NULL) |
19913 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
19914 | } |
19915 | ||
19916 | static void | |
19917 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
19918 | { | |
19919 | while (per_cu) | |
19920 | { | |
19921 | per_cu->cu->mark = 0; | |
19922 | per_cu = per_cu->cu->read_in_chain; | |
19923 | } | |
72bf9492 DJ |
19924 | } |
19925 | ||
72bf9492 DJ |
19926 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
19927 | is its offset in .debug_info for this objfile. */ | |
19928 | ||
19929 | static hashval_t | |
19930 | partial_die_hash (const void *item) | |
19931 | { | |
19932 | const struct partial_die_info *part_die = item; | |
9a619af0 | 19933 | |
b64f50a1 | 19934 | return part_die->offset.sect_off; |
72bf9492 DJ |
19935 | } |
19936 | ||
19937 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
19938 | are equal if they have the same offset. */ | |
19939 | ||
19940 | static int | |
19941 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
19942 | { | |
19943 | const struct partial_die_info *part_die_lhs = item_lhs; | |
19944 | const struct partial_die_info *part_die_rhs = item_rhs; | |
9a619af0 | 19945 | |
b64f50a1 | 19946 | return part_die_lhs->offset.sect_off == part_die_rhs->offset.sect_off; |
72bf9492 DJ |
19947 | } |
19948 | ||
ae038cb0 DJ |
19949 | static struct cmd_list_element *set_dwarf2_cmdlist; |
19950 | static struct cmd_list_element *show_dwarf2_cmdlist; | |
19951 | ||
19952 | static void | |
19953 | set_dwarf2_cmd (char *args, int from_tty) | |
19954 | { | |
19955 | help_list (set_dwarf2_cmdlist, "maintenance set dwarf2 ", -1, gdb_stdout); | |
19956 | } | |
19957 | ||
19958 | static void | |
19959 | show_dwarf2_cmd (char *args, int from_tty) | |
6e70227d | 19960 | { |
ae038cb0 DJ |
19961 | cmd_show_list (show_dwarf2_cmdlist, from_tty, ""); |
19962 | } | |
19963 | ||
4bf44c1c | 19964 | /* Free data associated with OBJFILE, if necessary. */ |
dce234bc PP |
19965 | |
19966 | static void | |
c1bd65d0 | 19967 | dwarf2_per_objfile_free (struct objfile *objfile, void *d) |
dce234bc PP |
19968 | { |
19969 | struct dwarf2_per_objfile *data = d; | |
8b70b953 | 19970 | int ix; |
8b70b953 | 19971 | |
95554aad TT |
19972 | for (ix = 0; ix < dwarf2_per_objfile->n_comp_units; ++ix) |
19973 | VEC_free (dwarf2_per_cu_ptr, | |
796a7ff8 DE |
19974 | dwarf2_per_objfile->all_comp_units[ix]->imported_symtabs); |
19975 | ||
19976 | for (ix = 0; ix < dwarf2_per_objfile->n_type_units; ++ix) | |
19977 | VEC_free (dwarf2_per_cu_ptr, | |
19978 | dwarf2_per_objfile->all_type_units[ix]->per_cu.imported_symtabs); | |
95554aad | 19979 | |
8b70b953 | 19980 | VEC_free (dwarf2_section_info_def, data->types); |
3019eac3 DE |
19981 | |
19982 | if (data->dwo_files) | |
19983 | free_dwo_files (data->dwo_files, objfile); | |
5c6fa7ab DE |
19984 | if (data->dwp_file) |
19985 | gdb_bfd_unref (data->dwp_file->dbfd); | |
36586728 TT |
19986 | |
19987 | if (data->dwz_file && data->dwz_file->dwz_bfd) | |
19988 | gdb_bfd_unref (data->dwz_file->dwz_bfd); | |
9291a0cd TT |
19989 | } |
19990 | ||
19991 | \f | |
ae2de4f8 | 19992 | /* The "save gdb-index" command. */ |
9291a0cd TT |
19993 | |
19994 | /* The contents of the hash table we create when building the string | |
19995 | table. */ | |
19996 | struct strtab_entry | |
19997 | { | |
19998 | offset_type offset; | |
19999 | const char *str; | |
20000 | }; | |
20001 | ||
559a7a62 JK |
20002 | /* Hash function for a strtab_entry. |
20003 | ||
20004 | Function is used only during write_hash_table so no index format backward | |
20005 | compatibility is needed. */ | |
b89be57b | 20006 | |
9291a0cd TT |
20007 | static hashval_t |
20008 | hash_strtab_entry (const void *e) | |
20009 | { | |
20010 | const struct strtab_entry *entry = e; | |
559a7a62 | 20011 | return mapped_index_string_hash (INT_MAX, entry->str); |
9291a0cd TT |
20012 | } |
20013 | ||
20014 | /* Equality function for a strtab_entry. */ | |
b89be57b | 20015 | |
9291a0cd TT |
20016 | static int |
20017 | eq_strtab_entry (const void *a, const void *b) | |
20018 | { | |
20019 | const struct strtab_entry *ea = a; | |
20020 | const struct strtab_entry *eb = b; | |
20021 | return !strcmp (ea->str, eb->str); | |
20022 | } | |
20023 | ||
20024 | /* Create a strtab_entry hash table. */ | |
b89be57b | 20025 | |
9291a0cd TT |
20026 | static htab_t |
20027 | create_strtab (void) | |
20028 | { | |
20029 | return htab_create_alloc (100, hash_strtab_entry, eq_strtab_entry, | |
20030 | xfree, xcalloc, xfree); | |
20031 | } | |
20032 | ||
20033 | /* Add a string to the constant pool. Return the string's offset in | |
20034 | host order. */ | |
b89be57b | 20035 | |
9291a0cd TT |
20036 | static offset_type |
20037 | add_string (htab_t table, struct obstack *cpool, const char *str) | |
20038 | { | |
20039 | void **slot; | |
20040 | struct strtab_entry entry; | |
20041 | struct strtab_entry *result; | |
20042 | ||
20043 | entry.str = str; | |
20044 | slot = htab_find_slot (table, &entry, INSERT); | |
20045 | if (*slot) | |
20046 | result = *slot; | |
20047 | else | |
20048 | { | |
20049 | result = XNEW (struct strtab_entry); | |
20050 | result->offset = obstack_object_size (cpool); | |
20051 | result->str = str; | |
20052 | obstack_grow_str0 (cpool, str); | |
20053 | *slot = result; | |
20054 | } | |
20055 | return result->offset; | |
20056 | } | |
20057 | ||
20058 | /* An entry in the symbol table. */ | |
20059 | struct symtab_index_entry | |
20060 | { | |
20061 | /* The name of the symbol. */ | |
20062 | const char *name; | |
20063 | /* The offset of the name in the constant pool. */ | |
20064 | offset_type index_offset; | |
20065 | /* A sorted vector of the indices of all the CUs that hold an object | |
20066 | of this name. */ | |
20067 | VEC (offset_type) *cu_indices; | |
20068 | }; | |
20069 | ||
20070 | /* The symbol table. This is a power-of-2-sized hash table. */ | |
20071 | struct mapped_symtab | |
20072 | { | |
20073 | offset_type n_elements; | |
20074 | offset_type size; | |
20075 | struct symtab_index_entry **data; | |
20076 | }; | |
20077 | ||
20078 | /* Hash function for a symtab_index_entry. */ | |
b89be57b | 20079 | |
9291a0cd TT |
20080 | static hashval_t |
20081 | hash_symtab_entry (const void *e) | |
20082 | { | |
20083 | const struct symtab_index_entry *entry = e; | |
20084 | return iterative_hash (VEC_address (offset_type, entry->cu_indices), | |
20085 | sizeof (offset_type) * VEC_length (offset_type, | |
20086 | entry->cu_indices), | |
20087 | 0); | |
20088 | } | |
20089 | ||
20090 | /* Equality function for a symtab_index_entry. */ | |
b89be57b | 20091 | |
9291a0cd TT |
20092 | static int |
20093 | eq_symtab_entry (const void *a, const void *b) | |
20094 | { | |
20095 | const struct symtab_index_entry *ea = a; | |
20096 | const struct symtab_index_entry *eb = b; | |
20097 | int len = VEC_length (offset_type, ea->cu_indices); | |
20098 | if (len != VEC_length (offset_type, eb->cu_indices)) | |
20099 | return 0; | |
20100 | return !memcmp (VEC_address (offset_type, ea->cu_indices), | |
20101 | VEC_address (offset_type, eb->cu_indices), | |
20102 | sizeof (offset_type) * len); | |
20103 | } | |
20104 | ||
20105 | /* Destroy a symtab_index_entry. */ | |
b89be57b | 20106 | |
9291a0cd TT |
20107 | static void |
20108 | delete_symtab_entry (void *p) | |
20109 | { | |
20110 | struct symtab_index_entry *entry = p; | |
20111 | VEC_free (offset_type, entry->cu_indices); | |
20112 | xfree (entry); | |
20113 | } | |
20114 | ||
20115 | /* Create a hash table holding symtab_index_entry objects. */ | |
b89be57b | 20116 | |
9291a0cd | 20117 | static htab_t |
3876f04e | 20118 | create_symbol_hash_table (void) |
9291a0cd TT |
20119 | { |
20120 | return htab_create_alloc (100, hash_symtab_entry, eq_symtab_entry, | |
20121 | delete_symtab_entry, xcalloc, xfree); | |
20122 | } | |
20123 | ||
20124 | /* Create a new mapped symtab object. */ | |
b89be57b | 20125 | |
9291a0cd TT |
20126 | static struct mapped_symtab * |
20127 | create_mapped_symtab (void) | |
20128 | { | |
20129 | struct mapped_symtab *symtab = XNEW (struct mapped_symtab); | |
20130 | symtab->n_elements = 0; | |
20131 | symtab->size = 1024; | |
20132 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
20133 | return symtab; | |
20134 | } | |
20135 | ||
20136 | /* Destroy a mapped_symtab. */ | |
b89be57b | 20137 | |
9291a0cd TT |
20138 | static void |
20139 | cleanup_mapped_symtab (void *p) | |
20140 | { | |
20141 | struct mapped_symtab *symtab = p; | |
20142 | /* The contents of the array are freed when the other hash table is | |
20143 | destroyed. */ | |
20144 | xfree (symtab->data); | |
20145 | xfree (symtab); | |
20146 | } | |
20147 | ||
20148 | /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to | |
559a7a62 JK |
20149 | the slot. |
20150 | ||
20151 | Function is used only during write_hash_table so no index format backward | |
20152 | compatibility is needed. */ | |
b89be57b | 20153 | |
9291a0cd TT |
20154 | static struct symtab_index_entry ** |
20155 | find_slot (struct mapped_symtab *symtab, const char *name) | |
20156 | { | |
559a7a62 | 20157 | offset_type index, step, hash = mapped_index_string_hash (INT_MAX, name); |
9291a0cd TT |
20158 | |
20159 | index = hash & (symtab->size - 1); | |
20160 | step = ((hash * 17) & (symtab->size - 1)) | 1; | |
20161 | ||
20162 | for (;;) | |
20163 | { | |
20164 | if (!symtab->data[index] || !strcmp (name, symtab->data[index]->name)) | |
20165 | return &symtab->data[index]; | |
20166 | index = (index + step) & (symtab->size - 1); | |
20167 | } | |
20168 | } | |
20169 | ||
20170 | /* Expand SYMTAB's hash table. */ | |
b89be57b | 20171 | |
9291a0cd TT |
20172 | static void |
20173 | hash_expand (struct mapped_symtab *symtab) | |
20174 | { | |
20175 | offset_type old_size = symtab->size; | |
20176 | offset_type i; | |
20177 | struct symtab_index_entry **old_entries = symtab->data; | |
20178 | ||
20179 | symtab->size *= 2; | |
20180 | symtab->data = XCNEWVEC (struct symtab_index_entry *, symtab->size); | |
20181 | ||
20182 | for (i = 0; i < old_size; ++i) | |
20183 | { | |
20184 | if (old_entries[i]) | |
20185 | { | |
20186 | struct symtab_index_entry **slot = find_slot (symtab, | |
20187 | old_entries[i]->name); | |
20188 | *slot = old_entries[i]; | |
20189 | } | |
20190 | } | |
20191 | ||
20192 | xfree (old_entries); | |
20193 | } | |
20194 | ||
156942c7 DE |
20195 | /* Add an entry to SYMTAB. NAME is the name of the symbol. |
20196 | CU_INDEX is the index of the CU in which the symbol appears. | |
20197 | IS_STATIC is one if the symbol is static, otherwise zero (global). */ | |
b89be57b | 20198 | |
9291a0cd TT |
20199 | static void |
20200 | add_index_entry (struct mapped_symtab *symtab, const char *name, | |
156942c7 | 20201 | int is_static, gdb_index_symbol_kind kind, |
9291a0cd TT |
20202 | offset_type cu_index) |
20203 | { | |
20204 | struct symtab_index_entry **slot; | |
156942c7 | 20205 | offset_type cu_index_and_attrs; |
9291a0cd TT |
20206 | |
20207 | ++symtab->n_elements; | |
20208 | if (4 * symtab->n_elements / 3 >= symtab->size) | |
20209 | hash_expand (symtab); | |
20210 | ||
20211 | slot = find_slot (symtab, name); | |
20212 | if (!*slot) | |
20213 | { | |
20214 | *slot = XNEW (struct symtab_index_entry); | |
20215 | (*slot)->name = name; | |
156942c7 | 20216 | /* index_offset is set later. */ |
9291a0cd TT |
20217 | (*slot)->cu_indices = NULL; |
20218 | } | |
156942c7 DE |
20219 | |
20220 | cu_index_and_attrs = 0; | |
20221 | DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs, cu_index); | |
20222 | DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs, is_static); | |
20223 | DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs, kind); | |
20224 | ||
20225 | /* We don't want to record an index value twice as we want to avoid the | |
20226 | duplication. | |
20227 | We process all global symbols and then all static symbols | |
20228 | (which would allow us to avoid the duplication by only having to check | |
20229 | the last entry pushed), but a symbol could have multiple kinds in one CU. | |
20230 | To keep things simple we don't worry about the duplication here and | |
20231 | sort and uniqufy the list after we've processed all symbols. */ | |
20232 | VEC_safe_push (offset_type, (*slot)->cu_indices, cu_index_and_attrs); | |
20233 | } | |
20234 | ||
20235 | /* qsort helper routine for uniquify_cu_indices. */ | |
20236 | ||
20237 | static int | |
20238 | offset_type_compare (const void *ap, const void *bp) | |
20239 | { | |
20240 | offset_type a = *(offset_type *) ap; | |
20241 | offset_type b = *(offset_type *) bp; | |
20242 | ||
20243 | return (a > b) - (b > a); | |
20244 | } | |
20245 | ||
20246 | /* Sort and remove duplicates of all symbols' cu_indices lists. */ | |
20247 | ||
20248 | static void | |
20249 | uniquify_cu_indices (struct mapped_symtab *symtab) | |
20250 | { | |
20251 | int i; | |
20252 | ||
20253 | for (i = 0; i < symtab->size; ++i) | |
20254 | { | |
20255 | struct symtab_index_entry *entry = symtab->data[i]; | |
20256 | ||
20257 | if (entry | |
20258 | && entry->cu_indices != NULL) | |
20259 | { | |
20260 | unsigned int next_to_insert, next_to_check; | |
20261 | offset_type last_value; | |
20262 | ||
20263 | qsort (VEC_address (offset_type, entry->cu_indices), | |
20264 | VEC_length (offset_type, entry->cu_indices), | |
20265 | sizeof (offset_type), offset_type_compare); | |
20266 | ||
20267 | last_value = VEC_index (offset_type, entry->cu_indices, 0); | |
20268 | next_to_insert = 1; | |
20269 | for (next_to_check = 1; | |
20270 | next_to_check < VEC_length (offset_type, entry->cu_indices); | |
20271 | ++next_to_check) | |
20272 | { | |
20273 | if (VEC_index (offset_type, entry->cu_indices, next_to_check) | |
20274 | != last_value) | |
20275 | { | |
20276 | last_value = VEC_index (offset_type, entry->cu_indices, | |
20277 | next_to_check); | |
20278 | VEC_replace (offset_type, entry->cu_indices, next_to_insert, | |
20279 | last_value); | |
20280 | ++next_to_insert; | |
20281 | } | |
20282 | } | |
20283 | VEC_truncate (offset_type, entry->cu_indices, next_to_insert); | |
20284 | } | |
20285 | } | |
9291a0cd TT |
20286 | } |
20287 | ||
20288 | /* Add a vector of indices to the constant pool. */ | |
b89be57b | 20289 | |
9291a0cd | 20290 | static offset_type |
3876f04e | 20291 | add_indices_to_cpool (htab_t symbol_hash_table, struct obstack *cpool, |
9291a0cd TT |
20292 | struct symtab_index_entry *entry) |
20293 | { | |
20294 | void **slot; | |
20295 | ||
3876f04e | 20296 | slot = htab_find_slot (symbol_hash_table, entry, INSERT); |
9291a0cd TT |
20297 | if (!*slot) |
20298 | { | |
20299 | offset_type len = VEC_length (offset_type, entry->cu_indices); | |
20300 | offset_type val = MAYBE_SWAP (len); | |
20301 | offset_type iter; | |
20302 | int i; | |
20303 | ||
20304 | *slot = entry; | |
20305 | entry->index_offset = obstack_object_size (cpool); | |
20306 | ||
20307 | obstack_grow (cpool, &val, sizeof (val)); | |
20308 | for (i = 0; | |
20309 | VEC_iterate (offset_type, entry->cu_indices, i, iter); | |
20310 | ++i) | |
20311 | { | |
20312 | val = MAYBE_SWAP (iter); | |
20313 | obstack_grow (cpool, &val, sizeof (val)); | |
20314 | } | |
20315 | } | |
20316 | else | |
20317 | { | |
20318 | struct symtab_index_entry *old_entry = *slot; | |
20319 | entry->index_offset = old_entry->index_offset; | |
20320 | entry = old_entry; | |
20321 | } | |
20322 | return entry->index_offset; | |
20323 | } | |
20324 | ||
20325 | /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with | |
20326 | constant pool entries going into the obstack CPOOL. */ | |
b89be57b | 20327 | |
9291a0cd TT |
20328 | static void |
20329 | write_hash_table (struct mapped_symtab *symtab, | |
20330 | struct obstack *output, struct obstack *cpool) | |
20331 | { | |
20332 | offset_type i; | |
3876f04e | 20333 | htab_t symbol_hash_table; |
9291a0cd TT |
20334 | htab_t str_table; |
20335 | ||
3876f04e | 20336 | symbol_hash_table = create_symbol_hash_table (); |
9291a0cd | 20337 | str_table = create_strtab (); |
3876f04e | 20338 | |
9291a0cd TT |
20339 | /* We add all the index vectors to the constant pool first, to |
20340 | ensure alignment is ok. */ | |
20341 | for (i = 0; i < symtab->size; ++i) | |
20342 | { | |
20343 | if (symtab->data[i]) | |
3876f04e | 20344 | add_indices_to_cpool (symbol_hash_table, cpool, symtab->data[i]); |
9291a0cd TT |
20345 | } |
20346 | ||
20347 | /* Now write out the hash table. */ | |
20348 | for (i = 0; i < symtab->size; ++i) | |
20349 | { | |
20350 | offset_type str_off, vec_off; | |
20351 | ||
20352 | if (symtab->data[i]) | |
20353 | { | |
20354 | str_off = add_string (str_table, cpool, symtab->data[i]->name); | |
20355 | vec_off = symtab->data[i]->index_offset; | |
20356 | } | |
20357 | else | |
20358 | { | |
20359 | /* While 0 is a valid constant pool index, it is not valid | |
20360 | to have 0 for both offsets. */ | |
20361 | str_off = 0; | |
20362 | vec_off = 0; | |
20363 | } | |
20364 | ||
20365 | str_off = MAYBE_SWAP (str_off); | |
20366 | vec_off = MAYBE_SWAP (vec_off); | |
20367 | ||
20368 | obstack_grow (output, &str_off, sizeof (str_off)); | |
20369 | obstack_grow (output, &vec_off, sizeof (vec_off)); | |
20370 | } | |
20371 | ||
20372 | htab_delete (str_table); | |
3876f04e | 20373 | htab_delete (symbol_hash_table); |
9291a0cd TT |
20374 | } |
20375 | ||
0a5429f6 DE |
20376 | /* Struct to map psymtab to CU index in the index file. */ |
20377 | struct psymtab_cu_index_map | |
20378 | { | |
20379 | struct partial_symtab *psymtab; | |
20380 | unsigned int cu_index; | |
20381 | }; | |
20382 | ||
20383 | static hashval_t | |
20384 | hash_psymtab_cu_index (const void *item) | |
20385 | { | |
20386 | const struct psymtab_cu_index_map *map = item; | |
20387 | ||
20388 | return htab_hash_pointer (map->psymtab); | |
20389 | } | |
20390 | ||
20391 | static int | |
20392 | eq_psymtab_cu_index (const void *item_lhs, const void *item_rhs) | |
20393 | { | |
20394 | const struct psymtab_cu_index_map *lhs = item_lhs; | |
20395 | const struct psymtab_cu_index_map *rhs = item_rhs; | |
20396 | ||
20397 | return lhs->psymtab == rhs->psymtab; | |
20398 | } | |
20399 | ||
20400 | /* Helper struct for building the address table. */ | |
20401 | struct addrmap_index_data | |
20402 | { | |
20403 | struct objfile *objfile; | |
20404 | struct obstack *addr_obstack; | |
20405 | htab_t cu_index_htab; | |
20406 | ||
20407 | /* Non-zero if the previous_* fields are valid. | |
20408 | We can't write an entry until we see the next entry (since it is only then | |
20409 | that we know the end of the entry). */ | |
20410 | int previous_valid; | |
20411 | /* Index of the CU in the table of all CUs in the index file. */ | |
20412 | unsigned int previous_cu_index; | |
0963b4bd | 20413 | /* Start address of the CU. */ |
0a5429f6 DE |
20414 | CORE_ADDR previous_cu_start; |
20415 | }; | |
20416 | ||
20417 | /* Write an address entry to OBSTACK. */ | |
b89be57b | 20418 | |
9291a0cd | 20419 | static void |
0a5429f6 DE |
20420 | add_address_entry (struct objfile *objfile, struct obstack *obstack, |
20421 | CORE_ADDR start, CORE_ADDR end, unsigned int cu_index) | |
9291a0cd | 20422 | { |
0a5429f6 | 20423 | offset_type cu_index_to_write; |
948f8e3d | 20424 | gdb_byte addr[8]; |
9291a0cd TT |
20425 | CORE_ADDR baseaddr; |
20426 | ||
20427 | baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)); | |
20428 | ||
0a5429f6 DE |
20429 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, start - baseaddr); |
20430 | obstack_grow (obstack, addr, 8); | |
20431 | store_unsigned_integer (addr, 8, BFD_ENDIAN_LITTLE, end - baseaddr); | |
20432 | obstack_grow (obstack, addr, 8); | |
20433 | cu_index_to_write = MAYBE_SWAP (cu_index); | |
20434 | obstack_grow (obstack, &cu_index_to_write, sizeof (offset_type)); | |
20435 | } | |
20436 | ||
20437 | /* Worker function for traversing an addrmap to build the address table. */ | |
20438 | ||
20439 | static int | |
20440 | add_address_entry_worker (void *datap, CORE_ADDR start_addr, void *obj) | |
20441 | { | |
20442 | struct addrmap_index_data *data = datap; | |
20443 | struct partial_symtab *pst = obj; | |
0a5429f6 DE |
20444 | |
20445 | if (data->previous_valid) | |
20446 | add_address_entry (data->objfile, data->addr_obstack, | |
20447 | data->previous_cu_start, start_addr, | |
20448 | data->previous_cu_index); | |
20449 | ||
20450 | data->previous_cu_start = start_addr; | |
20451 | if (pst != NULL) | |
20452 | { | |
20453 | struct psymtab_cu_index_map find_map, *map; | |
20454 | find_map.psymtab = pst; | |
20455 | map = htab_find (data->cu_index_htab, &find_map); | |
20456 | gdb_assert (map != NULL); | |
20457 | data->previous_cu_index = map->cu_index; | |
20458 | data->previous_valid = 1; | |
20459 | } | |
20460 | else | |
20461 | data->previous_valid = 0; | |
20462 | ||
20463 | return 0; | |
20464 | } | |
20465 | ||
20466 | /* Write OBJFILE's address map to OBSTACK. | |
20467 | CU_INDEX_HTAB is used to map addrmap entries to their CU indices | |
20468 | in the index file. */ | |
20469 | ||
20470 | static void | |
20471 | write_address_map (struct objfile *objfile, struct obstack *obstack, | |
20472 | htab_t cu_index_htab) | |
20473 | { | |
20474 | struct addrmap_index_data addrmap_index_data; | |
20475 | ||
20476 | /* When writing the address table, we have to cope with the fact that | |
20477 | the addrmap iterator only provides the start of a region; we have to | |
20478 | wait until the next invocation to get the start of the next region. */ | |
20479 | ||
20480 | addrmap_index_data.objfile = objfile; | |
20481 | addrmap_index_data.addr_obstack = obstack; | |
20482 | addrmap_index_data.cu_index_htab = cu_index_htab; | |
20483 | addrmap_index_data.previous_valid = 0; | |
20484 | ||
20485 | addrmap_foreach (objfile->psymtabs_addrmap, add_address_entry_worker, | |
20486 | &addrmap_index_data); | |
20487 | ||
20488 | /* It's highly unlikely the last entry (end address = 0xff...ff) | |
20489 | is valid, but we should still handle it. | |
20490 | The end address is recorded as the start of the next region, but that | |
20491 | doesn't work here. To cope we pass 0xff...ff, this is a rare situation | |
20492 | anyway. */ | |
20493 | if (addrmap_index_data.previous_valid) | |
20494 | add_address_entry (objfile, obstack, | |
20495 | addrmap_index_data.previous_cu_start, (CORE_ADDR) -1, | |
20496 | addrmap_index_data.previous_cu_index); | |
9291a0cd TT |
20497 | } |
20498 | ||
156942c7 DE |
20499 | /* Return the symbol kind of PSYM. */ |
20500 | ||
20501 | static gdb_index_symbol_kind | |
20502 | symbol_kind (struct partial_symbol *psym) | |
20503 | { | |
20504 | domain_enum domain = PSYMBOL_DOMAIN (psym); | |
20505 | enum address_class aclass = PSYMBOL_CLASS (psym); | |
20506 | ||
20507 | switch (domain) | |
20508 | { | |
20509 | case VAR_DOMAIN: | |
20510 | switch (aclass) | |
20511 | { | |
20512 | case LOC_BLOCK: | |
20513 | return GDB_INDEX_SYMBOL_KIND_FUNCTION; | |
20514 | case LOC_TYPEDEF: | |
20515 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20516 | case LOC_COMPUTED: | |
20517 | case LOC_CONST_BYTES: | |
20518 | case LOC_OPTIMIZED_OUT: | |
20519 | case LOC_STATIC: | |
20520 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20521 | case LOC_CONST: | |
20522 | /* Note: It's currently impossible to recognize psyms as enum values | |
20523 | short of reading the type info. For now punt. */ | |
20524 | return GDB_INDEX_SYMBOL_KIND_VARIABLE; | |
20525 | default: | |
20526 | /* There are other LOC_FOO values that one might want to classify | |
20527 | as variables, but dwarf2read.c doesn't currently use them. */ | |
20528 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20529 | } | |
20530 | case STRUCT_DOMAIN: | |
20531 | return GDB_INDEX_SYMBOL_KIND_TYPE; | |
20532 | default: | |
20533 | return GDB_INDEX_SYMBOL_KIND_OTHER; | |
20534 | } | |
20535 | } | |
20536 | ||
9291a0cd | 20537 | /* Add a list of partial symbols to SYMTAB. */ |
b89be57b | 20538 | |
9291a0cd TT |
20539 | static void |
20540 | write_psymbols (struct mapped_symtab *symtab, | |
987d643c | 20541 | htab_t psyms_seen, |
9291a0cd TT |
20542 | struct partial_symbol **psymp, |
20543 | int count, | |
987d643c TT |
20544 | offset_type cu_index, |
20545 | int is_static) | |
9291a0cd TT |
20546 | { |
20547 | for (; count-- > 0; ++psymp) | |
20548 | { | |
156942c7 DE |
20549 | struct partial_symbol *psym = *psymp; |
20550 | void **slot; | |
987d643c | 20551 | |
156942c7 | 20552 | if (SYMBOL_LANGUAGE (psym) == language_ada) |
9291a0cd | 20553 | error (_("Ada is not currently supported by the index")); |
987d643c | 20554 | |
987d643c | 20555 | /* Only add a given psymbol once. */ |
156942c7 | 20556 | slot = htab_find_slot (psyms_seen, psym, INSERT); |
987d643c TT |
20557 | if (!*slot) |
20558 | { | |
156942c7 DE |
20559 | gdb_index_symbol_kind kind = symbol_kind (psym); |
20560 | ||
20561 | *slot = psym; | |
20562 | add_index_entry (symtab, SYMBOL_SEARCH_NAME (psym), | |
20563 | is_static, kind, cu_index); | |
987d643c | 20564 | } |
9291a0cd TT |
20565 | } |
20566 | } | |
20567 | ||
20568 | /* Write the contents of an ("unfinished") obstack to FILE. Throw an | |
20569 | exception if there is an error. */ | |
b89be57b | 20570 | |
9291a0cd TT |
20571 | static void |
20572 | write_obstack (FILE *file, struct obstack *obstack) | |
20573 | { | |
20574 | if (fwrite (obstack_base (obstack), 1, obstack_object_size (obstack), | |
20575 | file) | |
20576 | != obstack_object_size (obstack)) | |
20577 | error (_("couldn't data write to file")); | |
20578 | } | |
20579 | ||
20580 | /* Unlink a file if the argument is not NULL. */ | |
b89be57b | 20581 | |
9291a0cd TT |
20582 | static void |
20583 | unlink_if_set (void *p) | |
20584 | { | |
20585 | char **filename = p; | |
20586 | if (*filename) | |
20587 | unlink (*filename); | |
20588 | } | |
20589 | ||
1fd400ff TT |
20590 | /* A helper struct used when iterating over debug_types. */ |
20591 | struct signatured_type_index_data | |
20592 | { | |
20593 | struct objfile *objfile; | |
20594 | struct mapped_symtab *symtab; | |
20595 | struct obstack *types_list; | |
987d643c | 20596 | htab_t psyms_seen; |
1fd400ff TT |
20597 | int cu_index; |
20598 | }; | |
20599 | ||
20600 | /* A helper function that writes a single signatured_type to an | |
20601 | obstack. */ | |
b89be57b | 20602 | |
1fd400ff TT |
20603 | static int |
20604 | write_one_signatured_type (void **slot, void *d) | |
20605 | { | |
20606 | struct signatured_type_index_data *info = d; | |
20607 | struct signatured_type *entry = (struct signatured_type *) *slot; | |
0186c6a7 | 20608 | struct partial_symtab *psymtab = entry->per_cu.v.psymtab; |
1fd400ff TT |
20609 | gdb_byte val[8]; |
20610 | ||
20611 | write_psymbols (info->symtab, | |
987d643c | 20612 | info->psyms_seen, |
3e43a32a MS |
20613 | info->objfile->global_psymbols.list |
20614 | + psymtab->globals_offset, | |
987d643c TT |
20615 | psymtab->n_global_syms, info->cu_index, |
20616 | 0); | |
1fd400ff | 20617 | write_psymbols (info->symtab, |
987d643c | 20618 | info->psyms_seen, |
3e43a32a MS |
20619 | info->objfile->static_psymbols.list |
20620 | + psymtab->statics_offset, | |
987d643c TT |
20621 | psymtab->n_static_syms, info->cu_index, |
20622 | 1); | |
1fd400ff | 20623 | |
b64f50a1 JK |
20624 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20625 | entry->per_cu.offset.sect_off); | |
1fd400ff | 20626 | obstack_grow (info->types_list, val, 8); |
3019eac3 DE |
20627 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20628 | entry->type_offset_in_tu.cu_off); | |
1fd400ff TT |
20629 | obstack_grow (info->types_list, val, 8); |
20630 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, entry->signature); | |
20631 | obstack_grow (info->types_list, val, 8); | |
20632 | ||
20633 | ++info->cu_index; | |
20634 | ||
20635 | return 1; | |
20636 | } | |
20637 | ||
95554aad TT |
20638 | /* Recurse into all "included" dependencies and write their symbols as |
20639 | if they appeared in this psymtab. */ | |
20640 | ||
20641 | static void | |
20642 | recursively_write_psymbols (struct objfile *objfile, | |
20643 | struct partial_symtab *psymtab, | |
20644 | struct mapped_symtab *symtab, | |
20645 | htab_t psyms_seen, | |
20646 | offset_type cu_index) | |
20647 | { | |
20648 | int i; | |
20649 | ||
20650 | for (i = 0; i < psymtab->number_of_dependencies; ++i) | |
20651 | if (psymtab->dependencies[i]->user != NULL) | |
20652 | recursively_write_psymbols (objfile, psymtab->dependencies[i], | |
20653 | symtab, psyms_seen, cu_index); | |
20654 | ||
20655 | write_psymbols (symtab, | |
20656 | psyms_seen, | |
20657 | objfile->global_psymbols.list + psymtab->globals_offset, | |
20658 | psymtab->n_global_syms, cu_index, | |
20659 | 0); | |
20660 | write_psymbols (symtab, | |
20661 | psyms_seen, | |
20662 | objfile->static_psymbols.list + psymtab->statics_offset, | |
20663 | psymtab->n_static_syms, cu_index, | |
20664 | 1); | |
20665 | } | |
20666 | ||
9291a0cd | 20667 | /* Create an index file for OBJFILE in the directory DIR. */ |
b89be57b | 20668 | |
9291a0cd TT |
20669 | static void |
20670 | write_psymtabs_to_index (struct objfile *objfile, const char *dir) | |
20671 | { | |
20672 | struct cleanup *cleanup; | |
20673 | char *filename, *cleanup_filename; | |
1fd400ff TT |
20674 | struct obstack contents, addr_obstack, constant_pool, symtab_obstack; |
20675 | struct obstack cu_list, types_cu_list; | |
9291a0cd TT |
20676 | int i; |
20677 | FILE *out_file; | |
20678 | struct mapped_symtab *symtab; | |
20679 | offset_type val, size_of_contents, total_len; | |
20680 | struct stat st; | |
987d643c | 20681 | htab_t psyms_seen; |
0a5429f6 DE |
20682 | htab_t cu_index_htab; |
20683 | struct psymtab_cu_index_map *psymtab_cu_index_map; | |
9291a0cd | 20684 | |
b4f2f049 | 20685 | if (!objfile->psymtabs || !objfile->psymtabs_addrmap) |
9291a0cd | 20686 | return; |
b4f2f049 | 20687 | |
9291a0cd TT |
20688 | if (dwarf2_per_objfile->using_index) |
20689 | error (_("Cannot use an index to create the index")); | |
20690 | ||
8b70b953 TT |
20691 | if (VEC_length (dwarf2_section_info_def, dwarf2_per_objfile->types) > 1) |
20692 | error (_("Cannot make an index when the file has multiple .debug_types sections")); | |
20693 | ||
9291a0cd | 20694 | if (stat (objfile->name, &st) < 0) |
7e17e088 | 20695 | perror_with_name (objfile->name); |
9291a0cd TT |
20696 | |
20697 | filename = concat (dir, SLASH_STRING, lbasename (objfile->name), | |
20698 | INDEX_SUFFIX, (char *) NULL); | |
20699 | cleanup = make_cleanup (xfree, filename); | |
20700 | ||
614c279d | 20701 | out_file = gdb_fopen_cloexec (filename, "wb"); |
9291a0cd TT |
20702 | if (!out_file) |
20703 | error (_("Can't open `%s' for writing"), filename); | |
20704 | ||
20705 | cleanup_filename = filename; | |
20706 | make_cleanup (unlink_if_set, &cleanup_filename); | |
20707 | ||
20708 | symtab = create_mapped_symtab (); | |
20709 | make_cleanup (cleanup_mapped_symtab, symtab); | |
20710 | ||
20711 | obstack_init (&addr_obstack); | |
20712 | make_cleanup_obstack_free (&addr_obstack); | |
20713 | ||
20714 | obstack_init (&cu_list); | |
20715 | make_cleanup_obstack_free (&cu_list); | |
20716 | ||
1fd400ff TT |
20717 | obstack_init (&types_cu_list); |
20718 | make_cleanup_obstack_free (&types_cu_list); | |
20719 | ||
987d643c TT |
20720 | psyms_seen = htab_create_alloc (100, htab_hash_pointer, htab_eq_pointer, |
20721 | NULL, xcalloc, xfree); | |
96408a79 | 20722 | make_cleanup_htab_delete (psyms_seen); |
987d643c | 20723 | |
0a5429f6 DE |
20724 | /* While we're scanning CU's create a table that maps a psymtab pointer |
20725 | (which is what addrmap records) to its index (which is what is recorded | |
20726 | in the index file). This will later be needed to write the address | |
20727 | table. */ | |
20728 | cu_index_htab = htab_create_alloc (100, | |
20729 | hash_psymtab_cu_index, | |
20730 | eq_psymtab_cu_index, | |
20731 | NULL, xcalloc, xfree); | |
96408a79 | 20732 | make_cleanup_htab_delete (cu_index_htab); |
0a5429f6 DE |
20733 | psymtab_cu_index_map = (struct psymtab_cu_index_map *) |
20734 | xmalloc (sizeof (struct psymtab_cu_index_map) | |
20735 | * dwarf2_per_objfile->n_comp_units); | |
20736 | make_cleanup (xfree, psymtab_cu_index_map); | |
20737 | ||
20738 | /* The CU list is already sorted, so we don't need to do additional | |
1fd400ff TT |
20739 | work here. Also, the debug_types entries do not appear in |
20740 | all_comp_units, but only in their own hash table. */ | |
9291a0cd TT |
20741 | for (i = 0; i < dwarf2_per_objfile->n_comp_units; ++i) |
20742 | { | |
3e43a32a MS |
20743 | struct dwarf2_per_cu_data *per_cu |
20744 | = dwarf2_per_objfile->all_comp_units[i]; | |
e254ef6a | 20745 | struct partial_symtab *psymtab = per_cu->v.psymtab; |
9291a0cd | 20746 | gdb_byte val[8]; |
0a5429f6 DE |
20747 | struct psymtab_cu_index_map *map; |
20748 | void **slot; | |
9291a0cd | 20749 | |
95554aad TT |
20750 | if (psymtab->user == NULL) |
20751 | recursively_write_psymbols (objfile, psymtab, symtab, psyms_seen, i); | |
9291a0cd | 20752 | |
0a5429f6 DE |
20753 | map = &psymtab_cu_index_map[i]; |
20754 | map->psymtab = psymtab; | |
20755 | map->cu_index = i; | |
20756 | slot = htab_find_slot (cu_index_htab, map, INSERT); | |
20757 | gdb_assert (slot != NULL); | |
20758 | gdb_assert (*slot == NULL); | |
20759 | *slot = map; | |
9291a0cd | 20760 | |
b64f50a1 JK |
20761 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, |
20762 | per_cu->offset.sect_off); | |
9291a0cd | 20763 | obstack_grow (&cu_list, val, 8); |
e254ef6a | 20764 | store_unsigned_integer (val, 8, BFD_ENDIAN_LITTLE, per_cu->length); |
9291a0cd TT |
20765 | obstack_grow (&cu_list, val, 8); |
20766 | } | |
20767 | ||
0a5429f6 DE |
20768 | /* Dump the address map. */ |
20769 | write_address_map (objfile, &addr_obstack, cu_index_htab); | |
20770 | ||
1fd400ff TT |
20771 | /* Write out the .debug_type entries, if any. */ |
20772 | if (dwarf2_per_objfile->signatured_types) | |
20773 | { | |
20774 | struct signatured_type_index_data sig_data; | |
20775 | ||
20776 | sig_data.objfile = objfile; | |
20777 | sig_data.symtab = symtab; | |
20778 | sig_data.types_list = &types_cu_list; | |
987d643c | 20779 | sig_data.psyms_seen = psyms_seen; |
1fd400ff TT |
20780 | sig_data.cu_index = dwarf2_per_objfile->n_comp_units; |
20781 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types, | |
20782 | write_one_signatured_type, &sig_data); | |
20783 | } | |
20784 | ||
156942c7 DE |
20785 | /* Now that we've processed all symbols we can shrink their cu_indices |
20786 | lists. */ | |
20787 | uniquify_cu_indices (symtab); | |
20788 | ||
9291a0cd TT |
20789 | obstack_init (&constant_pool); |
20790 | make_cleanup_obstack_free (&constant_pool); | |
20791 | obstack_init (&symtab_obstack); | |
20792 | make_cleanup_obstack_free (&symtab_obstack); | |
20793 | write_hash_table (symtab, &symtab_obstack, &constant_pool); | |
20794 | ||
20795 | obstack_init (&contents); | |
20796 | make_cleanup_obstack_free (&contents); | |
1fd400ff | 20797 | size_of_contents = 6 * sizeof (offset_type); |
9291a0cd TT |
20798 | total_len = size_of_contents; |
20799 | ||
20800 | /* The version number. */ | |
796a7ff8 | 20801 | val = MAYBE_SWAP (8); |
9291a0cd TT |
20802 | obstack_grow (&contents, &val, sizeof (val)); |
20803 | ||
20804 | /* The offset of the CU list from the start of the file. */ | |
20805 | val = MAYBE_SWAP (total_len); | |
20806 | obstack_grow (&contents, &val, sizeof (val)); | |
20807 | total_len += obstack_object_size (&cu_list); | |
20808 | ||
1fd400ff TT |
20809 | /* The offset of the types CU list from the start of the file. */ |
20810 | val = MAYBE_SWAP (total_len); | |
20811 | obstack_grow (&contents, &val, sizeof (val)); | |
20812 | total_len += obstack_object_size (&types_cu_list); | |
20813 | ||
9291a0cd TT |
20814 | /* The offset of the address table from the start of the file. */ |
20815 | val = MAYBE_SWAP (total_len); | |
20816 | obstack_grow (&contents, &val, sizeof (val)); | |
20817 | total_len += obstack_object_size (&addr_obstack); | |
20818 | ||
20819 | /* The offset of the symbol table from the start of the file. */ | |
20820 | val = MAYBE_SWAP (total_len); | |
20821 | obstack_grow (&contents, &val, sizeof (val)); | |
20822 | total_len += obstack_object_size (&symtab_obstack); | |
20823 | ||
20824 | /* The offset of the constant pool from the start of the file. */ | |
20825 | val = MAYBE_SWAP (total_len); | |
20826 | obstack_grow (&contents, &val, sizeof (val)); | |
20827 | total_len += obstack_object_size (&constant_pool); | |
20828 | ||
20829 | gdb_assert (obstack_object_size (&contents) == size_of_contents); | |
20830 | ||
20831 | write_obstack (out_file, &contents); | |
20832 | write_obstack (out_file, &cu_list); | |
1fd400ff | 20833 | write_obstack (out_file, &types_cu_list); |
9291a0cd TT |
20834 | write_obstack (out_file, &addr_obstack); |
20835 | write_obstack (out_file, &symtab_obstack); | |
20836 | write_obstack (out_file, &constant_pool); | |
20837 | ||
20838 | fclose (out_file); | |
20839 | ||
20840 | /* We want to keep the file, so we set cleanup_filename to NULL | |
20841 | here. See unlink_if_set. */ | |
20842 | cleanup_filename = NULL; | |
20843 | ||
20844 | do_cleanups (cleanup); | |
20845 | } | |
20846 | ||
90476074 TT |
20847 | /* Implementation of the `save gdb-index' command. |
20848 | ||
20849 | Note that the file format used by this command is documented in the | |
20850 | GDB manual. Any changes here must be documented there. */ | |
11570e71 | 20851 | |
9291a0cd TT |
20852 | static void |
20853 | save_gdb_index_command (char *arg, int from_tty) | |
20854 | { | |
20855 | struct objfile *objfile; | |
20856 | ||
20857 | if (!arg || !*arg) | |
96d19272 | 20858 | error (_("usage: save gdb-index DIRECTORY")); |
9291a0cd TT |
20859 | |
20860 | ALL_OBJFILES (objfile) | |
20861 | { | |
20862 | struct stat st; | |
20863 | ||
20864 | /* If the objfile does not correspond to an actual file, skip it. */ | |
20865 | if (stat (objfile->name, &st) < 0) | |
20866 | continue; | |
20867 | ||
20868 | dwarf2_per_objfile = objfile_data (objfile, dwarf2_objfile_data_key); | |
20869 | if (dwarf2_per_objfile) | |
20870 | { | |
20871 | volatile struct gdb_exception except; | |
20872 | ||
20873 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
20874 | { | |
20875 | write_psymtabs_to_index (objfile, arg); | |
20876 | } | |
20877 | if (except.reason < 0) | |
20878 | exception_fprintf (gdb_stderr, except, | |
20879 | _("Error while writing index for `%s': "), | |
20880 | objfile->name); | |
20881 | } | |
20882 | } | |
dce234bc PP |
20883 | } |
20884 | ||
9291a0cd TT |
20885 | \f |
20886 | ||
9eae7c52 TT |
20887 | int dwarf2_always_disassemble; |
20888 | ||
20889 | static void | |
20890 | show_dwarf2_always_disassemble (struct ui_file *file, int from_tty, | |
20891 | struct cmd_list_element *c, const char *value) | |
20892 | { | |
3e43a32a MS |
20893 | fprintf_filtered (file, |
20894 | _("Whether to always disassemble " | |
20895 | "DWARF expressions is %s.\n"), | |
9eae7c52 TT |
20896 | value); |
20897 | } | |
20898 | ||
900e11f9 JK |
20899 | static void |
20900 | show_check_physname (struct ui_file *file, int from_tty, | |
20901 | struct cmd_list_element *c, const char *value) | |
20902 | { | |
20903 | fprintf_filtered (file, | |
20904 | _("Whether to check \"physname\" is %s.\n"), | |
20905 | value); | |
20906 | } | |
20907 | ||
6502dd73 DJ |
20908 | void _initialize_dwarf2_read (void); |
20909 | ||
20910 | void | |
20911 | _initialize_dwarf2_read (void) | |
20912 | { | |
96d19272 JK |
20913 | struct cmd_list_element *c; |
20914 | ||
dce234bc | 20915 | dwarf2_objfile_data_key |
c1bd65d0 | 20916 | = register_objfile_data_with_cleanup (NULL, dwarf2_per_objfile_free); |
ae038cb0 | 20917 | |
1bedd215 AC |
20918 | add_prefix_cmd ("dwarf2", class_maintenance, set_dwarf2_cmd, _("\ |
20919 | Set DWARF 2 specific variables.\n\ | |
20920 | Configure DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20921 | &set_dwarf2_cmdlist, "maintenance set dwarf2 ", |
20922 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
20923 | ||
1bedd215 AC |
20924 | add_prefix_cmd ("dwarf2", class_maintenance, show_dwarf2_cmd, _("\ |
20925 | Show DWARF 2 specific variables\n\ | |
20926 | Show DWARF 2 variables such as the cache size"), | |
ae038cb0 DJ |
20927 | &show_dwarf2_cmdlist, "maintenance show dwarf2 ", |
20928 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
20929 | ||
20930 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, | |
7915a72c AC |
20931 | &dwarf2_max_cache_age, _("\ |
20932 | Set the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20933 | Show the upper bound on the age of cached dwarf2 compilation units."), _("\ | |
20934 | A higher limit means that cached compilation units will be stored\n\ | |
20935 | in memory longer, and more total memory will be used. Zero disables\n\ | |
20936 | caching, which can slow down startup."), | |
2c5b56ce | 20937 | NULL, |
920d2a44 | 20938 | show_dwarf2_max_cache_age, |
2c5b56ce | 20939 | &set_dwarf2_cmdlist, |
ae038cb0 | 20940 | &show_dwarf2_cmdlist); |
d97bc12b | 20941 | |
9eae7c52 TT |
20942 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
20943 | &dwarf2_always_disassemble, _("\ | |
20944 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
20945 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
20946 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
20947 | syntax. When disabled, expressions will be printed in a more\n\ | |
20948 | conversational style, when possible."), | |
20949 | NULL, | |
20950 | show_dwarf2_always_disassemble, | |
20951 | &set_dwarf2_cmdlist, | |
20952 | &show_dwarf2_cmdlist); | |
20953 | ||
45cfd468 DE |
20954 | add_setshow_boolean_cmd ("dwarf2-read", no_class, &dwarf2_read_debug, _("\ |
20955 | Set debugging of the dwarf2 reader."), _("\ | |
20956 | Show debugging of the dwarf2 reader."), _("\ | |
20957 | When enabled, debugging messages are printed during dwarf2 reading\n\ | |
20958 | and symtab expansion."), | |
20959 | NULL, | |
20960 | NULL, | |
20961 | &setdebuglist, &showdebuglist); | |
20962 | ||
ccce17b0 | 20963 | add_setshow_zuinteger_cmd ("dwarf2-die", no_class, &dwarf2_die_debug, _("\ |
d97bc12b DE |
20964 | Set debugging of the dwarf2 DIE reader."), _("\ |
20965 | Show debugging of the dwarf2 DIE reader."), _("\ | |
20966 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
20967 | The value is the maximum depth to print."), | |
ccce17b0 YQ |
20968 | NULL, |
20969 | NULL, | |
20970 | &setdebuglist, &showdebuglist); | |
9291a0cd | 20971 | |
900e11f9 JK |
20972 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
20973 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
20974 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
20975 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
20976 | the demangler."), | |
20977 | NULL, show_check_physname, | |
20978 | &setdebuglist, &showdebuglist); | |
20979 | ||
e615022a DE |
20980 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
20981 | no_class, &use_deprecated_index_sections, _("\ | |
20982 | Set whether to use deprecated gdb_index sections."), _("\ | |
20983 | Show whether to use deprecated gdb_index sections."), _("\ | |
20984 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
20985 | Normally they are ignored either because of a missing feature or\n\ | |
20986 | performance issue.\n\ | |
20987 | Warning: This option must be enabled before gdb reads the file."), | |
20988 | NULL, | |
20989 | NULL, | |
20990 | &setlist, &showlist); | |
20991 | ||
96d19272 | 20992 | c = add_cmd ("gdb-index", class_files, save_gdb_index_command, |
11570e71 | 20993 | _("\ |
fc1a9d6e | 20994 | Save a gdb-index file.\n\ |
11570e71 | 20995 | Usage: save gdb-index DIRECTORY"), |
96d19272 JK |
20996 | &save_cmdlist); |
20997 | set_cmd_completer (c, filename_completer); | |
f1e6e072 TT |
20998 | |
20999 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, | |
21000 | &dwarf2_locexpr_funcs); | |
21001 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
21002 | &dwarf2_loclist_funcs); | |
21003 | ||
21004 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
21005 | &dwarf2_block_frame_base_locexpr_funcs); | |
21006 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
21007 | &dwarf2_block_frame_base_loclist_funcs); | |
6502dd73 | 21008 | } |